.layout-sidebar .app-main {
  margin-left: var(--layout-offset-left);
  width: calc(100% - var(--layout-offset-left));
}
/**
 * Kratevia Design System
 * A modern, contemplative design system for habit tracking
 * Version 2.0
 */

@font-face {
  font-family: 'Source Sans 3';
  src: url('../assets/fonts/source-sans-3-400.ttf') format('truetype');
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: 'Source Sans 3';
  src: url('../assets/fonts/source-sans-3-500.ttf') format('truetype');
  font-style: normal;
  font-weight: 500;
  font-display: swap;
}

@font-face {
  font-family: 'Source Sans 3';
  src: url('../assets/fonts/source-sans-3-600.ttf') format('truetype');
  font-style: normal;
  font-weight: 600;
  font-display: swap;
}

@font-face {
  font-family: 'Source Sans 3';
  src: url('../assets/fonts/source-sans-3-700.ttf') format('truetype');
  font-style: normal;
  font-weight: 700;
  font-display: swap;
}

@font-face {
  font-family: 'Inter';
  src: url('../assets/fonts/inter-400.ttf') format('truetype');
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: 'Inter';
  src: url('../assets/fonts/inter-500.ttf') format('truetype');
  font-style: normal;
  font-weight: 500;
  font-display: swap;
}

@font-face {
  font-family: 'Inter';
  src: url('../assets/fonts/inter-600.ttf') format('truetype');
  font-style: normal;
  font-weight: 600;
  font-display: swap;
}

@font-face {
  font-family: 'Inter';
  src: url('../assets/fonts/inter-700.ttf') format('truetype');
  font-style: normal;
  font-weight: 700;
  font-display: swap;
}

@font-face {
  font-family: 'Space Grotesk';
  src: url('../assets/fonts/space-grotesk-400.ttf') format('truetype');
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: 'Space Grotesk';
  src: url('../assets/fonts/space-grotesk-500.ttf') format('truetype');
  font-style: normal;
  font-weight: 500;
  font-display: swap;
}

@font-face {
  font-family: 'Space Grotesk';
  src: url('../assets/fonts/space-grotesk-600.ttf') format('truetype');
  font-style: normal;
  font-weight: 600;
  font-display: swap;
}

@font-face {
  font-family: 'Space Grotesk';
  src: url('../assets/fonts/space-grotesk-700.ttf') format('truetype');
  font-style: normal;
  font-weight: 700;
  font-display: swap;
}

/* ============================================
   1. CSS CUSTOM PROPERTIES (DESIGN TOKENS)
   ============================================ */

:root {
  /* === Color Palette === */
  
  /* Primary Accent - Warm Amber/Gold */
  --accent-50: #fffbeb;
  --accent-100: #fef3c7;
  --accent-200: #fde68a;
  --accent-300: #fcd34d;
  --accent-400: #fbbf24;
  --accent-500: #f59e0b;
  --accent-600: #d97706;
  --accent-700: #b45309;
  --accent-800: #92400e;
  --accent-900: #78350f;
  --gold-text-start: var(--accent-700);
  --gold-text-mid: var(--accent-400);
  --gold-text-end: var(--accent-500);
  --rarity-premium: #7f8fb8;
  --rarity-premium-soft: rgba(127, 143, 184, 0.24);
  --rarity-premium-glow: rgba(127, 143, 184, 0.14);
  --rarity-special: #c9893f;
  --rarity-special-soft: rgba(201, 137, 63, 0.28);
  --rarity-special-glow: rgba(201, 137, 63, 0.16);
  --rarity-legendary: #f6c65b;
  --rarity-legendary-soft: rgba(246, 198, 91, 0.3);
  --rarity-legendary-glow: rgba(246, 198, 91, 0.22);
  --mirror-accent: #d6b15a;
  --kv-ui-accent: var(--accent-500);
  --kv-ui-accent-soft: rgba(245, 158, 11, 0.18);
  --kv-ui-surface-tint: rgba(245, 158, 11, 0.08);
  --kv-ui-border-tint: rgba(245, 158, 11, 0.28);
  --kv-ui-gradient-start: var(--accent-500);
  --kv-ui-gradient-end: var(--accent-300);
  --kv-app-bg: var(--bg-base);
  --kv-app-bg-gradient: var(--bg-base);
  --kv-shell-bg: var(--surface-primary);
  --kv-sidebar-bg: var(--surface-primary);
  --kv-topbar-bg: var(--surface-primary);
  --kv-surface: var(--surface-primary);
  --kv-surface-raised: var(--surface-elevated);
  --kv-surface-soft: var(--surface-secondary);
  --kv-surface-hover: var(--surface-interactive-hover);
  --kv-surface-active: var(--accent-bg);
  --kv-text: var(--text-primary);
  --kv-text-muted: var(--text-secondary);
  --kv-text-soft: var(--text-tertiary);
  --kv-text-inverse: var(--text-inverse);
  --kv-border: var(--border-default);
  --kv-border-soft: var(--border-subtle);
  --kv-border-strong: var(--border-strong);
  --kv-shadow-soft: var(--shadow-sm);
  --kv-shadow-raised: var(--shadow-lg);
  --kv-focus-ring: var(--interactive-focus);
  --kv-accent: var(--accent-500);
  --kv-accent-hover: var(--accent-400);
  --kv-accent-active: var(--accent-600);
  --kv-accent-soft: var(--accent-bg);
  --kv-accent-text: var(--text-accent);
  --kv-btn-primary-bg: var(--button-primary-bg);
  --kv-btn-primary-bg-hover: var(--button-primary-hover);
  --kv-btn-primary-text: var(--button-primary-text);
  --kv-btn-secondary-bg: var(--surface-interactive);
  --kv-btn-secondary-bg-hover: var(--surface-interactive-hover);
  --kv-btn-secondary-text: var(--text-primary);
  --kv-btn-danger-bg: var(--danger);
  --kv-btn-danger-bg-hover: var(--danger-dark);
  --kv-btn-danger-text: #ffffff;
  --kv-success: var(--success);
  --kv-success-soft: var(--success-light);
  --kv-warning: var(--warning);
  --kv-warning-soft: var(--warning-light);
  --kv-danger: var(--danger);
  --kv-danger-soft: var(--danger-light);
  --kv-info: var(--info);
  --kv-info-soft: var(--info-light);
  --kv-card-bg: var(--surface-primary);
  --kv-card-bg-hover: var(--surface-interactive-hover);
  --kv-card-border: var(--card-border);
  --kv-modal-bg: var(--surface-primary);
  --kv-modal-border: var(--border-default);
  --kv-popover-bg: var(--surface-primary);
  --kv-popover-border: var(--border-default);
  --kv-input-bg: var(--input-bg);
  --kv-input-border: var(--input-border);
  --kv-input-focus-border: var(--input-focus-ring);
  --kv-input-placeholder: var(--text-muted);
  --kv-tab-bg: var(--surface-interactive);
  --kv-tab-bg-active: var(--accent-bg);
  --kv-tab-text: var(--text-secondary);
  --kv-tab-text-active: var(--text-accent);
  --kv-badge-bg: var(--accent-bg);
  --kv-badge-text: var(--text-accent);
  --kv-progress-bg: var(--surface-tertiary);
  --kv-progress-fill: var(--accent-500);
  --kv-calendar-bg: var(--surface-primary);
  --kv-calendar-toolbar-bg: var(--surface-secondary);
  --kv-calendar-header-bg: var(--surface-secondary);
  --kv-calendar-header-text: var(--text-secondary);
  --kv-calendar-sticky-bg: var(--surface-primary);
  --kv-calendar-sticky-row-bg: var(--surface-primary);
  --kv-calendar-sticky-category-bg: var(--surface-secondary);
  --kv-calendar-sticky-border: var(--border-subtle);
  --kv-calendar-grid-bg: var(--surface-primary);
  --kv-calendar-cell-bg: var(--surface-primary);
  --kv-calendar-cell-bg-hover: var(--surface-interactive-hover);
  --kv-calendar-cell-border: var(--border-subtle);
  --kv-calendar-cell-future-bg: transparent;
  --kv-calendar-cell-future-border: color-mix(in srgb, var(--border-subtle) 72%, transparent);
  --kv-calendar-cell-disabled-bg: var(--surface-secondary);
  --kv-calendar-cell-completed-bg: var(--success-light);
  --kv-calendar-cell-completed-border: color-mix(in srgb, var(--success) 52%, var(--border-subtle));
  --kv-calendar-cell-missed-bg: var(--danger-light);
  --kv-calendar-cell-missed-border: color-mix(in srgb, var(--danger) 52%, var(--border-subtle));
  --kv-calendar-cell-planned-bg: var(--warning-light);
  --kv-calendar-cell-planned-border: color-mix(in srgb, var(--warning) 52%, var(--border-subtle));
  --kv-calendar-today-bg: var(--accent-bg);
  --kv-calendar-today-border: var(--accent-border);
  --kv-calendar-cell-selected-bg: var(--accent-bg);
  --kv-calendar-cell-selected-border: var(--accent-border);
  --kv-calendar-check-bg: var(--success);
  --kv-calendar-check-border: var(--success);
  --kv-calendar-check-icon: #ffffff;
  --kv-calendar-metric-bg: var(--surface-secondary);
  --kv-calendar-metric-text: var(--text-primary);
  --kv-calendar-muted-text: var(--text-tertiary);
  --kv-calendar-row-divider: var(--border-subtle);
  --kv-calendar-category-accent: var(--accent-500);
  --kv-habit-card-bg: var(--kv-card-bg);
  --kv-habit-card-bg-hover: var(--kv-card-bg-hover);
  --kv-stats-card-bg: var(--kv-card-bg);
  --kv-stats-card-bg-hover: var(--kv-card-bg-hover);
  --kv-toggle-bg: var(--surface-tertiary);
  --kv-toggle-bg-active: var(--accent-bg);
  --kv-toggle-thumb-bg: var(--surface-primary);
  --kv-checkbox-bg: var(--surface-primary);
  --kv-checkbox-border: var(--border-default);
  --kv-disabled-bg: var(--surface-secondary);
  --kv-disabled-text: var(--text-muted);
  --kv-toast-bg: var(--surface-primary);
  --kv-toast-border: var(--border-default);
  
  /* Neutral Palette */
  --neutral-0: #ffffff;
  --neutral-50: #fafafa;
  --neutral-100: #f4f4f5;
  --neutral-200: #e4e4e7;
  --neutral-300: #d4d4d8;
  --neutral-400: #a1a1aa;
  --neutral-500: #71717a;
  --neutral-600: #52525b;
  --neutral-700: #3f3f46;
  --neutral-800: #27272a;
  --neutral-850: #1f1f23;
  --neutral-900: #18181b;
  --neutral-925: #121214;
  --neutral-950: #09090b;
  
  /* Semantic Colors */
  --success-light: #dcfce7;
  --success: #22c55e;
  --success-dark: #16a34a;
  
  --danger-light: #fee2e2;
  --danger: #ef4444;
  --danger-dark: #dc2626;
  
  --warning-light: #fef3c7;
  --warning: #f59e0b;
  --warning-dark: #d97706;
  
  --info-light: #dbeafe;
  --info: #3b82f6;
  --info-dark: #2563eb;
  
  /* === Typography === */
  --font-sans: 'Source Sans 3', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-display: 'Source Sans 3', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  
  /* Font Sizes */
  --text-xs: 0.75rem;      /* 12px */
  --text-sm: 0.875rem;     /* 14px */
  --text-base: 1rem;       /* 16px */
  --text-lg: 1.125rem;     /* 18px */
  --text-xl: 1.25rem;      /* 20px */
  --text-2xl: 1.5rem;      /* 24px */
  --text-3xl: 1.875rem;    /* 30px */
  --text-4xl: 2.25rem;     /* 36px */
  --text-5xl: 3rem;        /* 48px */
  --text-6xl: 3.75rem;     /* 60px */
  
  /* Font Weights */
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
  
  /* Line Heights */
  --leading-none: 1;
  --leading-tight: 1.25;
  --leading-snug: 1.375;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;
  
  /* Letter Spacing */
  --tracking-tighter: -0.05em;
  --tracking-tight: -0.025em;
  --tracking-normal: 0;
  --tracking-wide: 0.025em;
  --tracking-wider: 0.05em;
  --tracking-widest: 0.1em;
  
  /* === Spacing Scale === */
  --space-0: 0;
  --space-px: 1px;
  --space-0-5: 0.125rem;   /* 2px */
  --space-1: 0.25rem;      /* 4px */
  --space-1-5: 0.375rem;   /* 6px */
  --space-2: 0.5rem;       /* 8px */
  --space-2-5: 0.625rem;   /* 10px */
  --space-3: 0.75rem;      /* 12px */
  --space-3-5: 0.875rem;   /* 14px */
  --space-4: 1rem;         /* 16px */
  --space-5: 1.25rem;      /* 20px */
  --space-6: 1.5rem;       /* 24px */
  --space-7: 1.75rem;      /* 28px */
  --space-8: 2rem;         /* 32px */
  --space-9: 2.25rem;      /* 36px */
  --space-10: 2.5rem;      /* 40px */
  --space-12: 3rem;        /* 48px */
  --space-14: 3.5rem;      /* 56px */
  --space-16: 4rem;        /* 64px */
  --space-20: 5rem;        /* 80px */
  --space-24: 6rem;        /* 96px */
  --space-32: 8rem;        /* 128px */
  
  /* === Border Radius === */
  --radius-none: 0;
  --radius-sm: 0.25rem;    /* 4px */
  --radius-md: 0.5rem;     /* 8px */
  --radius-lg: 0.75rem;    /* 12px */
  --radius-xl: 1rem;       /* 16px */
  --radius-2xl: 1.25rem;   /* 20px */
  --radius-3xl: 1.5rem;    /* 24px */
  --radius-full: 9999px;
  
  /* === Shadows === */
  --shadow-xs: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-sm: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
  --shadow-inner: inset 0 2px 4px 0 rgb(0 0 0 / 0.05);

  /* === Mobile and app-shell guardrail tokens === */
  --ks-tap-target-min: 44px;
  --ks-mobile-gutter: clamp(0.875rem, 4vw, 1.25rem);
  --ks-safe-area-top: env(safe-area-inset-top, 0px);
  --ks-safe-area-right: env(safe-area-inset-right, 0px);
  --ks-safe-area-bottom: env(safe-area-inset-bottom, 0px);
  --ks-safe-area-left: env(safe-area-inset-left, 0px);
  --ks-mobile-safe-padding-x: max(var(--ks-mobile-gutter), var(--ks-safe-area-left));
  --ks-mobile-safe-padding-bottom: max(var(--space-4), var(--ks-safe-area-bottom));
  --ks-modal-mobile-max-height: calc(100dvh - max(1rem, var(--ks-safe-area-top)) - max(1rem, var(--ks-safe-area-bottom)));
  --ks-bottom-sheet-max-height: calc(100dvh - max(0.75rem, var(--ks-safe-area-top)));
  --ks-glass-surface-bg: rgb(255 255 255 / 0.78);
  --ks-glass-surface-border: rgb(255 255 255 / 0.5);
  --ks-status-plus-bg: rgb(245 158 11 / 0.14);
  --ks-status-plus-border: rgb(245 158 11 / 0.36);
  --ks-status-premium-bg: rgb(127 143 184 / 0.16);
  --ks-status-premium-border: rgb(127 143 184 / 0.34);
  
  /* Glow Effects */
  --glow-accent: 0 0 20px rgb(251 191 36 / 0.3);
  --glow-accent-strong: 0 0 30px rgb(251 191 36 / 0.5);
  
  /* === Transitions === */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slower: 500ms cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Calendar tokens - Base */
  --cal-cell: rgba(15, 23, 42, 0.06);
  --cal-cell-hover: rgba(15, 23, 42, 0.1);
  --cal-border: rgba(15, 23, 42, 0.12);
  
  /* Calendar - Status colors (current month) */
  --cal-done-bg: rgba(34, 197, 94, 0.15);
  --cal-done-br: rgba(34, 197, 94, 0.4);
  --cal-skip-bg: rgba(239, 68, 68, 0.15);
  --cal-skip-br: rgba(239, 68, 68, 0.4);
  --cal-plan-bg: rgba(251, 191, 36, 0.15);
  --cal-plan-br: rgba(251, 191, 36, 0.4);
  --cal-off-bg: rgba(15, 23, 42, 0.03);
  --cal-off-br: rgba(15, 23, 42, 0.1);
  
  /* Calendar - Status colors (out-of-month, dimmed) */
  --cal-done-bg-dim: rgba(34, 197, 94, 0.08);
  --cal-done-br-dim: rgba(34, 197, 94, 0.2);
  --cal-skip-bg-dim: rgba(239, 68, 68, 0.08);
  --cal-skip-br-dim: rgba(239, 68, 68, 0.2);
  --cal-plan-bg-dim: rgba(251, 191, 36, 0.08);
  --cal-plan-br-dim: rgba(251, 191, 36, 0.2);
  --cal-off-bg-dim: rgba(15, 23, 42, 0.02);
  --cal-off-br-dim: rgba(15, 23, 42, 0.06);
  
  /* Calendar - Today highlight */
  --cal-today-glow: rgba(245, 158, 11, 0);
  --cal-today-header-bg: rgba(245, 158, 11, 0.1);
  --cal-today-text: var(--accent-600);
  --cal-today-column-bg: rgba(245, 158, 11, 0.055);
  --cal-today-column-line: rgba(245, 158, 11, 0.48);
  --cal-today-border: rgba(245, 158, 11, 0.42);
  
  /* Calendar - Past states (solid backgrounds, pastel) */
  --cal-past-done-bg: rgba(74, 222, 128, 0.25);
  --cal-past-done-br: rgba(74, 222, 128, 0.5);
  --cal-past-skip-bg: rgba(248, 113, 113, 0.25);
  --cal-past-skip-br: rgba(248, 113, 113, 0.5);
  
  /* Calendar - Future states (outline only, more visible dashed) */
  --cal-future-plan-bg: transparent;
  --cal-future-plan-br: rgba(251, 191, 36, 0.45);
  --cal-future-off-bg: transparent;
  --cal-future-off-br: rgba(15, 23, 42, 0.1);
  
  /* Calendar - Month boundary */
  --cal-month-border: rgba(64, 91, 128, 0.72);
  --cal-month-separator-width: 2px;
  --cal-month-separator-opacity: 0.96;
  
  /* Calendar - Week separator */
  --cal-week-separator: rgba(91, 122, 153, 0.24);
  --cal-week-separator-width: 1px;
  
  /* === Z-Index Scale === */
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-drawer: 1040;
  --z-dropdown: 1080;
  --z-popover: 1120;
  --z-modal-backdrop: 1200;
  --z-modal: 1210;
  --z-tooltip: 1300;
  --z-toast: 1400;
  
  /* === Layout === */
  --sidebar-width: 240px;
  --header-height: 64px;
  --container-max: 1400px;
  --content-max: 1200px;
  --layout-offset-left: 0px;
  --layout-offset-right: 0px;
}

html[data-ui-skin="spring"] {
  color-scheme: light;
  --kv-ui-accent: #6fbf7a;
  --kv-ui-accent-soft: rgba(111, 191, 122, 0.18);
  --kv-ui-surface-tint: rgba(111, 191, 122, 0.08);
  --kv-ui-border-tint: rgba(111, 191, 122, 0.28);
  --kv-ui-gradient-start: #7bcf91;
  --kv-ui-gradient-end: #f4d36d;
  --kv-app-bg: #f1f7ed;
  --kv-app-bg-gradient: radial-gradient(circle at 12% 8%, rgba(173, 216, 119, 0.22), transparent 30rem), linear-gradient(180deg, #f8fbf0 0%, #edf7eb 54%, #e2f0df 100%);
  --kv-shell-bg: rgba(250, 253, 244, 0.94);
  --kv-sidebar-bg: linear-gradient(180deg, rgba(250, 253, 244, 0.97), rgba(235, 246, 229, 0.95));
  --kv-topbar-bg: rgba(250, 253, 244, 0.92);
  --kv-surface: #fbfef7;
  --kv-surface-raised: #ffffff;
  --kv-surface-soft: #edf7e8;
  --kv-surface-hover: #e2f1df;
  --kv-surface-active: rgba(111, 191, 122, 0.16);
  --kv-text: #1e2a1b;
  --kv-text-muted: #4f6548;
  --kv-text-soft: #6f8367;
  --kv-text-inverse: #13200f;
  --kv-border: #b7d1ad;
  --kv-border-soft: #dbe9d6;
  --kv-border-strong: #83aa74;
  --kv-shadow-soft: 0 16px 34px -28px rgba(54, 91, 41, 0.28);
  --kv-shadow-raised: 0 28px 58px -40px rgba(54, 91, 41, 0.34);
  --kv-focus-ring: #6fbf7a;
  --kv-accent: #5da96b;
  --kv-accent-hover: #73bd7a;
  --kv-accent-active: #3f874f;
  --kv-accent-soft: rgba(111, 191, 122, 0.18);
  --kv-accent-text: #2e703b;
  --kv-btn-primary-bg: linear-gradient(135deg, #5da96b, #d9b84c);
  --kv-btn-primary-bg-hover: linear-gradient(135deg, #68ba75, #e4c760);
  --kv-btn-primary-text: #15210f;
  --kv-btn-secondary-bg: rgba(255, 255, 255, 0.7);
  --kv-btn-secondary-bg-hover: rgba(226, 241, 223, 0.96);
  --kv-btn-secondary-text: #21321c;
  --kv-btn-danger-bg: #b86456;
  --kv-btn-danger-bg-hover: #cc7566;
  --kv-btn-danger-text: #fffaf6;
  --kv-success: #4f9d65;
  --kv-success-soft: rgba(79, 157, 101, 0.16);
  --kv-warning: #c8a130;
  --kv-warning-soft: rgba(200, 161, 48, 0.16);
  --kv-danger: #b86456;
  --kv-danger-soft: rgba(184, 100, 86, 0.15);
  --kv-info: #4f9ba0;
  --kv-info-soft: rgba(79, 155, 160, 0.15);
  --kv-card-bg: linear-gradient(160deg, rgba(255, 255, 250, 0.96), rgba(238, 249, 232, 0.98));
  --kv-card-bg-hover: linear-gradient(160deg, rgba(255, 255, 253, 0.98), rgba(226, 242, 219, 0.99));
  --kv-card-border: rgba(131, 170, 116, 0.42);
  --kv-modal-bg: linear-gradient(180deg, #fffdf7, #edf7e8);
  --kv-modal-border: rgba(131, 170, 116, 0.48);
  --kv-popover-bg: linear-gradient(180deg, rgb(255, 255, 249), rgb(238, 248, 232));
  --kv-popover-border: rgba(131, 170, 116, 0.52);
  --kv-input-bg: rgba(255, 255, 255, 0.78);
  --kv-input-border: rgba(131, 170, 116, 0.52);
  --kv-input-focus-border: #6fbf7a;
  --kv-input-placeholder: #708268;
  --kv-tab-bg: rgba(237, 247, 232, 0.72);
  --kv-tab-bg-active: rgba(111, 191, 122, 0.2);
  --kv-tab-text: #4f6548;
  --kv-tab-text-active: #2f6d3c;
  --kv-badge-bg: rgba(111, 191, 122, 0.18);
  --kv-badge-text: #2f6d3c;
  --kv-progress-bg: rgba(183, 209, 173, 0.46);
  --kv-progress-fill: linear-gradient(90deg, #5da96b, #d9b84c);
  --kv-calendar-cell-bg: rgba(251, 254, 247, 0.88);
  --kv-calendar-cell-bg-hover: rgba(226, 241, 223, 0.98);
  --kv-calendar-cell-border: rgba(131, 170, 116, 0.38);
  --kv-calendar-today-bg: rgba(244, 211, 109, 0.2);
  --kv-calendar-today-border: rgba(200, 161, 48, 0.52);
  --kv-habit-card-bg: linear-gradient(160deg, rgba(255, 255, 250, 0.95), rgba(232, 246, 225, 0.96));
  --kv-habit-card-bg-hover: linear-gradient(160deg, rgba(255, 255, 250, 0.98), rgba(220, 239, 211, 0.98));
  --kv-stats-card-bg: linear-gradient(160deg, rgba(250, 254, 244, 0.96), rgba(232, 246, 225, 0.98));
  --kv-stats-card-bg-hover: linear-gradient(160deg, rgba(255, 255, 250, 0.98), rgba(220, 239, 211, 0.98));
  --kv-toggle-bg: rgba(183, 209, 173, 0.46);
  --kv-toggle-bg-active: linear-gradient(135deg, #5da96b, #d9b84c);
  --kv-toggle-thumb-bg: #fffdf7;
  --kv-checkbox-bg: rgba(255, 255, 255, 0.82);
  --kv-checkbox-border: rgba(131, 170, 116, 0.58);
  --kv-disabled-bg: rgba(226, 241, 223, 0.72);
  --kv-disabled-text: #7d8e74;
  --kv-toast-bg: #fffdf7;
  --kv-toast-border: rgba(131, 170, 116, 0.5);
}

html[data-ui-skin="summer"] {
  color-scheme: light;
  --kv-ui-accent: #30b7b3;
  --kv-ui-accent-soft: rgba(48, 183, 179, 0.18);
  --kv-ui-surface-tint: rgba(48, 183, 179, 0.08);
  --kv-ui-border-tint: rgba(48, 183, 179, 0.28);
  --kv-ui-gradient-start: #30b7b3;
  --kv-ui-gradient-end: #f3c85f;
  --kv-app-bg: #edf8f7;
  --kv-app-bg-gradient: radial-gradient(circle at 86% 6%, rgba(243, 200, 95, 0.24), transparent 28rem), radial-gradient(circle at 16% 24%, rgba(48, 183, 179, 0.18), transparent 26rem), linear-gradient(180deg, #fbf8e9 0%, #edf8f7 55%, #e0f2f0 100%);
  --kv-shell-bg: rgba(252, 250, 235, 0.94);
  --kv-sidebar-bg: linear-gradient(180deg, rgba(252, 250, 235, 0.97), rgba(226, 246, 243, 0.95));
  --kv-topbar-bg: rgba(252, 250, 235, 0.92);
  --kv-surface: #fffff5;
  --kv-surface-raised: #ffffff;
  --kv-surface-soft: #e5f5f3;
  --kv-surface-hover: #d8efec;
  --kv-surface-active: rgba(48, 183, 179, 0.16);
  --kv-text: #172a29;
  --kv-text-muted: #476362;
  --kv-text-soft: #6d817b;
  --kv-text-inverse: #102221;
  --kv-border: #a8d2cc;
  --kv-border-soft: #d4e9e6;
  --kv-border-strong: #6eb9b1;
  --kv-shadow-soft: 0 16px 34px -28px rgba(24, 102, 100, 0.26);
  --kv-shadow-raised: 0 28px 58px -40px rgba(24, 102, 100, 0.32);
  --kv-focus-ring: #30b7b3;
  --kv-accent: #1caaa6;
  --kv-accent-hover: #37c5bf;
  --kv-accent-active: #14827f;
  --kv-accent-soft: rgba(48, 183, 179, 0.18);
  --kv-accent-text: #106b68;
  --kv-btn-primary-bg: linear-gradient(135deg, #1caaa6, #f0bf4e);
  --kv-btn-primary-bg-hover: linear-gradient(135deg, #31c0bb, #f4cc67);
  --kv-btn-primary-text: #102221;
  --kv-btn-secondary-bg: rgba(255, 255, 255, 0.72);
  --kv-btn-secondary-bg-hover: rgba(220, 243, 240, 0.96);
  --kv-btn-secondary-text: #172f2e;
  --kv-btn-danger-bg: #c06458;
  --kv-btn-danger-bg-hover: #d17466;
  --kv-btn-danger-text: #fffaf4;
  --kv-success: #44a970;
  --kv-success-soft: rgba(68, 169, 112, 0.16);
  --kv-warning: #d39f34;
  --kv-warning-soft: rgba(211, 159, 52, 0.16);
  --kv-danger: #c06458;
  --kv-danger-soft: rgba(192, 100, 88, 0.15);
  --kv-info: #1caaa6;
  --kv-info-soft: rgba(28, 170, 166, 0.15);
  --kv-card-bg: linear-gradient(160deg, rgba(255, 255, 246, 0.96), rgba(226, 247, 244, 0.98));
  --kv-card-bg-hover: linear-gradient(160deg, rgba(255, 255, 250, 0.98), rgba(214, 241, 237, 0.99));
  --kv-card-border: rgba(110, 185, 177, 0.42);
  --kv-modal-bg: linear-gradient(180deg, #fffdee, #e6f7f4);
  --kv-modal-border: rgba(96, 177, 170, 0.48);
  --kv-popover-bg: linear-gradient(180deg, rgb(255, 253, 239), rgb(229, 247, 244));
  --kv-popover-border: rgba(96, 177, 170, 0.52);
  --kv-input-bg: rgba(255, 255, 255, 0.78);
  --kv-input-border: rgba(110, 185, 177, 0.52);
  --kv-input-focus-border: #30b7b3;
  --kv-input-placeholder: #6b817b;
  --kv-tab-bg: rgba(229, 245, 243, 0.76);
  --kv-tab-bg-active: rgba(48, 183, 179, 0.2);
  --kv-tab-text: #476362;
  --kv-tab-text-active: #106b68;
  --kv-badge-bg: rgba(48, 183, 179, 0.17);
  --kv-badge-text: #106b68;
  --kv-progress-bg: rgba(168, 210, 204, 0.48);
  --kv-progress-fill: linear-gradient(90deg, #1caaa6, #f0bf4e);
  --kv-calendar-cell-bg: rgba(255, 255, 245, 0.88);
  --kv-calendar-cell-bg-hover: rgba(216, 239, 236, 0.98);
  --kv-calendar-cell-border: rgba(110, 185, 177, 0.38);
  --kv-calendar-today-bg: rgba(243, 200, 95, 0.22);
  --kv-calendar-today-border: rgba(211, 159, 52, 0.54);
  --kv-habit-card-bg: linear-gradient(160deg, rgba(255, 253, 239, 0.96), rgba(222, 244, 241, 0.97));
  --kv-habit-card-bg-hover: linear-gradient(160deg, rgba(255, 254, 245, 0.98), rgba(208, 237, 233, 0.98));
  --kv-stats-card-bg: linear-gradient(160deg, rgba(255, 253, 239, 0.96), rgba(222, 244, 241, 0.97));
  --kv-stats-card-bg-hover: linear-gradient(160deg, rgba(255, 254, 245, 0.98), rgba(208, 237, 233, 0.98));
  --kv-toggle-bg: rgba(168, 210, 204, 0.5);
  --kv-toggle-bg-active: linear-gradient(135deg, #1caaa6, #f0bf4e);
  --kv-toggle-thumb-bg: #fffdf1;
  --kv-checkbox-bg: rgba(255, 255, 255, 0.82);
  --kv-checkbox-border: rgba(110, 185, 177, 0.58);
  --kv-disabled-bg: rgba(220, 243, 240, 0.74);
  --kv-disabled-text: #728780;
  --kv-toast-bg: #fffdf1;
  --kv-toast-border: rgba(96, 177, 170, 0.5);
}

html[data-ui-skin="autumn"] {
  color-scheme: dark;
  --kv-ui-accent: #d58a3f;
  --kv-ui-accent-soft: rgba(213, 138, 63, 0.2);
  --kv-ui-surface-tint: rgba(213, 138, 63, 0.12);
  --kv-ui-border-tint: rgba(213, 138, 63, 0.42);
  --kv-ui-gradient-start: #7b3f24;
  --kv-ui-gradient-end: #d9a441;
  --kv-app-bg: #120c08;
  --kv-app-bg-gradient:
    radial-gradient(circle at 12% 8%, rgba(128, 70, 33, 0.34), transparent 28rem),
    radial-gradient(circle at 88% 12%, rgba(217, 164, 65, 0.16), transparent 24rem),
    radial-gradient(circle at 50% 110%, rgba(82, 41, 24, 0.42), transparent 36rem),
    linear-gradient(180deg, #180f0a 0%, #110b08 48%, #080604 100%);
  --kv-shell-bg: rgba(30, 20, 14, 0.94);
  --kv-sidebar-bg:
    radial-gradient(circle at 20% 0%, rgba(217, 164, 65, 0.12), transparent 18rem),
    linear-gradient(180deg, rgba(33, 21, 14, 0.98), rgba(18, 11, 7, 0.98));
  --kv-topbar-bg:
    linear-gradient(135deg, rgba(46, 30, 20, 0.94), rgba(24, 15, 10, 0.92));
  --kv-surface: #241711;
  --kv-surface-raised: #302018;
  --kv-surface-soft: #1b120d;
  --kv-surface-hover: #3a261b;
  --kv-surface-active: #4b2f1f;
  --kv-text: #f6ead8;
  --kv-text-muted: #ceb89a;
  --kv-text-soft: #a98f6f;
  --kv-text-inverse: #130c08;
  --kv-border: #5b3a25;
  --kv-border-soft: rgba(164, 109, 66, 0.34);
  --kv-border-strong: #a86a35;
  --kv-shadow-soft: 0 18px 36px -28px rgba(0, 0, 0, 0.72), 0 8px 18px -14px rgba(112, 58, 27, 0.22);
  --kv-shadow-raised: 0 34px 72px -44px rgba(0, 0, 0, 0.86), 0 16px 32px -22px rgba(143, 75, 35, 0.28);
  --kv-focus-ring: #d9a441;
  --kv-accent: #d58a3f;
  --kv-accent-hover: #f0a650;
  --kv-accent-active: #a95a2f;
  --kv-accent-soft: rgba(213, 138, 63, 0.2);
  --kv-accent-text: #ffd59b;
  --kv-btn-primary-bg: linear-gradient(135deg, #a95a2f 0%, #d58a3f 48%, #d9a441 100%);
  --kv-btn-primary-bg-hover: linear-gradient(135deg, #b86636 0%, #ee9f50 48%, #e7b858 100%);
  --kv-btn-primary-text: #170d07;
  --kv-btn-secondary-bg: rgba(83, 52, 33, 0.64);
  --kv-btn-secondary-bg-hover: rgba(112, 70, 42, 0.78);
  --kv-btn-secondary-text: #f5dfc1;
  --kv-btn-danger-bg: #9d4738;
  --kv-btn-danger-bg-hover: #b95341;
  --kv-btn-danger-text: #fff6ec;
  --kv-success: #7f9f5b;
  --kv-success-soft: rgba(127, 159, 91, 0.18);
  --kv-warning: #d9a441;
  --kv-warning-soft: rgba(217, 164, 65, 0.18);
  --kv-danger: #b5533e;
  --kv-danger-soft: rgba(181, 83, 62, 0.18);
  --kv-info: #c07a45;
  --kv-info-soft: rgba(192, 122, 69, 0.18);
  --kv-card-bg:
    radial-gradient(circle at 12% 0%, rgba(217, 164, 65, 0.1), transparent 14rem),
    linear-gradient(160deg, rgba(48, 32, 24, 0.96), rgba(28, 18, 13, 0.98));
  --kv-card-bg-hover:
    radial-gradient(circle at 14% 0%, rgba(217, 164, 65, 0.15), transparent 15rem),
    linear-gradient(160deg, rgba(58, 38, 27, 0.98), rgba(32, 21, 15, 0.99));
  --kv-card-border: rgba(184, 116, 55, 0.46);
  --kv-modal-bg: linear-gradient(180deg, #2c1d15, #1a110d);
  --kv-modal-border: rgba(184, 116, 55, 0.48);
  --kv-popover-bg: linear-gradient(180deg, rgb(44, 29, 21), rgb(26, 17, 13));
  --kv-popover-border: rgba(184, 116, 55, 0.52);
  --kv-input-bg: rgba(18, 11, 7, 0.72);
  --kv-input-border: rgba(166, 108, 61, 0.52);
  --kv-input-focus-border: #d9a441;
  --kv-input-placeholder: #a98f6f;
  --kv-tab-bg: rgba(48, 32, 24, 0.62);
  --kv-tab-bg-active: rgba(213, 138, 63, 0.2);
  --kv-tab-text: #cdb89a;
  --kv-tab-text-active: #ffd59b;
  --kv-badge-bg: rgba(213, 138, 63, 0.18);
  --kv-badge-text: #ffd59b;
  --kv-progress-bg: rgba(91, 58, 37, 0.58);
  --kv-progress-fill: linear-gradient(90deg, #a95a2f, #d9a441);
  --kv-calendar-cell-bg: rgba(36, 23, 17, 0.78);
  --kv-calendar-cell-bg-hover: rgba(67, 43, 28, 0.86);
  --kv-calendar-cell-border: rgba(164, 109, 66, 0.32);
  --kv-calendar-today-bg: rgba(217, 164, 65, 0.16);
  --kv-calendar-today-border: rgba(217, 164, 65, 0.6);
  --kv-habit-card-bg:
    radial-gradient(circle at 12% 0%, rgba(217, 164, 65, 0.09), transparent 14rem),
    linear-gradient(160deg, rgba(46, 30, 21, 0.96), rgba(27, 18, 13, 0.98));
  --kv-habit-card-bg-hover:
    radial-gradient(circle at 14% 0%, rgba(217, 164, 65, 0.14), transparent 15rem),
    linear-gradient(160deg, rgba(56, 37, 26, 0.98), rgba(31, 20, 15, 0.99));
  --kv-stats-card-bg:
    radial-gradient(circle at 12% 0%, rgba(217, 164, 65, 0.09), transparent 14rem),
    linear-gradient(160deg, rgba(46, 30, 21, 0.96), rgba(27, 18, 13, 0.98));
  --kv-stats-card-bg-hover:
    radial-gradient(circle at 14% 0%, rgba(217, 164, 65, 0.14), transparent 15rem),
    linear-gradient(160deg, rgba(56, 37, 26, 0.98), rgba(31, 20, 15, 0.99));
  --kv-toggle-bg: rgba(91, 58, 37, 0.62);
  --kv-toggle-bg-active: linear-gradient(135deg, #a95a2f, #d9a441);
  --kv-toggle-thumb-bg: #f6ead8;
  --kv-checkbox-bg: rgba(18, 11, 7, 0.74);
  --kv-checkbox-border: rgba(166, 108, 61, 0.56);
  --kv-disabled-bg: rgba(48, 32, 24, 0.62);
  --kv-disabled-text: #8d775f;
  --kv-toast-bg: #2c1d15;
  --kv-toast-border: rgba(184, 116, 55, 0.48);
}

html[data-ui-skin="winter"] {
  color-scheme: light;
  --kv-ui-accent: #7aa6c8;
  --kv-ui-accent-soft: rgba(122, 166, 200, 0.18);
  --kv-ui-surface-tint: rgba(122, 166, 200, 0.08);
  --kv-ui-border-tint: rgba(122, 166, 200, 0.3);
  --kv-ui-gradient-start: #7aa6c8;
  --kv-ui-gradient-end: #edf7ff;
  --kv-app-bg: #edf4f8;
  --kv-app-bg-gradient: radial-gradient(circle at 18% 0%, rgba(237, 247, 255, 0.72), transparent 28rem), radial-gradient(circle at 88% 20%, rgba(122, 166, 200, 0.18), transparent 26rem), linear-gradient(180deg, #f8fbff 0%, #edf4f8 54%, #e2edf3 100%);
  --kv-shell-bg: rgba(248, 252, 255, 0.94);
  --kv-sidebar-bg: linear-gradient(180deg, rgba(248, 252, 255, 0.98), rgba(230, 240, 247, 0.96));
  --kv-topbar-bg: rgba(248, 252, 255, 0.93);
  --kv-surface: #fbfdff;
  --kv-surface-raised: #ffffff;
  --kv-surface-soft: #e8f1f7;
  --kv-surface-hover: #dceaf3;
  --kv-surface-active: rgba(122, 166, 200, 0.18);
  --kv-text: #17242c;
  --kv-text-muted: #475d6c;
  --kv-text-soft: #6d7f8c;
  --kv-text-inverse: #132733;
  --kv-border: #afc7d6;
  --kv-border-soft: #d8e5ed;
  --kv-border-strong: #7aa6c8;
  --kv-shadow-soft: 0 16px 34px -28px rgba(37, 78, 103, 0.24);
  --kv-shadow-raised: 0 28px 58px -40px rgba(37, 78, 103, 0.3);
  --kv-focus-ring: #7aa6c8;
  --kv-accent: #5e94bd;
  --kv-accent-hover: #76add3;
  --kv-accent-active: #44769b;
  --kv-accent-soft: rgba(122, 166, 200, 0.18);
  --kv-accent-text: #315f80;
  --kv-btn-primary-bg: linear-gradient(135deg, #5e94bd, #dbeeff);
  --kv-btn-primary-bg-hover: linear-gradient(135deg, #6ba4cd, #edf7ff);
  --kv-btn-primary-text: #132733;
  --kv-btn-secondary-bg: rgba(255, 255, 255, 0.72);
  --kv-btn-secondary-bg-hover: rgba(224, 238, 247, 0.96);
  --kv-btn-secondary-text: #182b35;
  --kv-btn-danger-bg: #b86666;
  --kv-btn-danger-bg-hover: #c97878;
  --kv-btn-danger-text: #fff8f8;
  --kv-success: #5f9f8c;
  --kv-success-soft: rgba(95, 159, 140, 0.16);
  --kv-warning: #b89a49;
  --kv-warning-soft: rgba(184, 154, 73, 0.15);
  --kv-danger: #b86666;
  --kv-danger-soft: rgba(184, 102, 102, 0.15);
  --kv-info: #5e94bd;
  --kv-info-soft: rgba(94, 148, 189, 0.16);
  --kv-card-bg: linear-gradient(160deg, rgba(251, 253, 255, 0.97), rgba(232, 242, 248, 0.98));
  --kv-card-bg-hover: linear-gradient(160deg, rgba(255, 255, 255, 0.99), rgba(220, 234, 243, 0.99));
  --kv-card-border: rgba(122, 166, 200, 0.42);
  --kv-modal-bg: linear-gradient(180deg, #fcfeff, #e8f1f7);
  --kv-modal-border: rgba(122, 166, 200, 0.5);
  --kv-popover-bg: linear-gradient(180deg, rgb(252, 254, 255), rgb(232, 241, 247));
  --kv-popover-border: rgba(122, 166, 200, 0.54);
  --kv-input-bg: rgba(255, 255, 255, 0.78);
  --kv-input-border: rgba(122, 166, 200, 0.52);
  --kv-input-focus-border: #7aa6c8;
  --kv-input-placeholder: #708292;
  --kv-tab-bg: rgba(232, 241, 247, 0.78);
  --kv-tab-bg-active: rgba(122, 166, 200, 0.22);
  --kv-tab-text: #475d6c;
  --kv-tab-text-active: #315f80;
  --kv-badge-bg: rgba(122, 166, 200, 0.18);
  --kv-badge-text: #315f80;
  --kv-progress-bg: rgba(175, 199, 214, 0.5);
  --kv-progress-fill: linear-gradient(90deg, #5e94bd, #dbeeff);
  --kv-calendar-cell-bg: rgba(251, 253, 255, 0.88);
  --kv-calendar-cell-bg-hover: rgba(220, 234, 243, 0.98);
  --kv-calendar-cell-border: rgba(122, 166, 200, 0.4);
  --kv-calendar-today-bg: rgba(219, 238, 255, 0.58);
  --kv-calendar-today-border: rgba(94, 148, 189, 0.56);
  --kv-habit-card-bg: linear-gradient(160deg, rgba(252, 254, 255, 0.96), rgba(228, 239, 246, 0.97));
  --kv-habit-card-bg-hover: linear-gradient(160deg, rgba(255, 255, 255, 0.99), rgba(216, 232, 242, 0.99));
  --kv-stats-card-bg: linear-gradient(160deg, rgba(252, 254, 255, 0.96), rgba(228, 239, 246, 0.97));
  --kv-stats-card-bg-hover: linear-gradient(160deg, rgba(255, 255, 255, 0.99), rgba(216, 232, 242, 0.99));
  --kv-toggle-bg: rgba(175, 199, 214, 0.5);
  --kv-toggle-bg-active: linear-gradient(135deg, #5e94bd, #dbeeff);
  --kv-toggle-thumb-bg: #fcfeff;
  --kv-checkbox-bg: rgba(255, 255, 255, 0.84);
  --kv-checkbox-border: rgba(122, 166, 200, 0.58);
  --kv-disabled-bg: rgba(224, 238, 247, 0.74);
  --kv-disabled-text: #728390;
  --kv-toast-bg: #fcfeff;
  --kv-toast-border: rgba(122, 166, 200, 0.5);
}

/* Theme Visual Polish: seasonal premium skins are standalone palettes, not
   light/dark accent variants. Keep this late so it owns the visual contract. */
html[data-ui-skin="spring"] {
  color-scheme: light;
  --kv-ui-accent: #347f41;
  --kv-ui-accent-soft: rgba(52, 127, 65, 0.2);
  --kv-ui-surface-tint: rgba(110, 164, 91, 0.14);
  --kv-ui-border-tint: rgba(91, 135, 74, 0.36);
  --kv-ui-gradient-start: #dff0c8;
  --kv-ui-gradient-end: #eac65c;
  --kv-app-bg: #e7f0d9;
  --kv-app-bg-gradient:
    radial-gradient(circle at 11% 4%, rgba(234, 198, 92, 0.34), transparent 24rem),
    radial-gradient(circle at 86% 12%, rgba(94, 145, 82, 0.28), transparent 28rem),
    linear-gradient(180deg, #f4edcf 0%, #dfefcf 46%, #cfe4c4 100%);
  --kv-shell-bg: rgba(236, 246, 220, 0.96);
  --kv-sidebar-bg:
    radial-gradient(circle at 18% 0%, rgba(234, 198, 92, 0.22), transparent 18rem),
    linear-gradient(180deg, #e2f0d0 0%, #c8ddb9 100%);
  --kv-topbar-bg: linear-gradient(135deg, rgba(241, 245, 218, 0.97), rgba(210, 229, 194, 0.94));
  --kv-surface: #f4f2d6;
  --kv-surface-raised: #fff9dd;
  --kv-surface-soft: #d9eac9;
  --kv-surface-hover: #c6dfb8;
  --kv-surface-active: #b5d4a4;
  --kv-text: #16311f;
  --kv-text-muted: #405c3c;
  --kv-text-soft: #657754;
  --kv-text-inverse: #f9f3d5;
  --kv-border: #91ad76;
  --kv-border-soft: #c3d5ad;
  --kv-border-strong: #5f8d53;
  --kv-shadow-soft: 0 18px 34px -28px rgba(36, 74, 37, 0.34);
  --kv-shadow-raised: 0 30px 58px -40px rgba(35, 78, 38, 0.42);
  --kv-focus-ring: #4e9a58;
  --kv-accent: #347f41;
  --kv-accent-hover: #469a50;
  --kv-accent-active: #265f32;
  --kv-accent-soft: rgba(52, 127, 65, 0.2);
  --kv-accent-text: #1d6330;
  --kv-btn-primary-bg: linear-gradient(135deg, #2f793c 0%, #58a759 58%, #e3bd48 100%);
  --kv-btn-primary-bg-hover: linear-gradient(135deg, #398f45 0%, #67bc66 56%, #efcc5c 100%);
  --kv-btn-primary-text: #102211;
  --kv-btn-secondary-bg: linear-gradient(135deg, rgba(255, 250, 219, 0.82), rgba(208, 228, 190, 0.86));
  --kv-btn-secondary-bg-hover: linear-gradient(135deg, rgba(246, 239, 199, 0.96), rgba(188, 216, 171, 0.96));
  --kv-btn-secondary-text: #23401f;
  --kv-btn-danger-bg: #b85f50;
  --kv-btn-danger-bg-hover: #cb6f5f;
  --kv-btn-danger-text: #fff8ec;
  --kv-success: #3f8a49;
  --kv-success-soft: rgba(63, 138, 73, 0.18);
  --kv-warning: #c19a2b;
  --kv-warning-soft: rgba(193, 154, 43, 0.2);
  --kv-danger: #b85f50;
  --kv-danger-soft: rgba(184, 95, 80, 0.16);
  --kv-info: #4a8f89;
  --kv-info-soft: rgba(74, 143, 137, 0.16);
  --kv-card-bg:
    radial-gradient(circle at 14% 0%, rgba(234, 198, 92, 0.18), transparent 13rem),
    linear-gradient(160deg, rgba(255, 248, 219, 0.96), rgba(218, 236, 201, 0.98));
  --kv-card-bg-hover:
    radial-gradient(circle at 16% 0%, rgba(234, 198, 92, 0.25), transparent 14rem),
    linear-gradient(160deg, rgba(255, 249, 224, 0.99), rgba(200, 225, 183, 0.99));
  --kv-card-border: rgba(95, 141, 83, 0.5);
  --kv-modal-bg: linear-gradient(180deg, #fff7d9, #dceccf);
  --kv-modal-border: rgba(95, 141, 83, 0.56);
  --kv-popover-bg: linear-gradient(180deg, rgb(255, 248, 220), rgb(216, 235, 202));
  --kv-popover-border: rgba(95, 141, 83, 0.58);
  --kv-input-bg: rgba(255, 251, 225, 0.9);
  --kv-input-border: rgba(95, 141, 83, 0.62);
  --kv-input-focus-border: #4e9a58;
  --kv-input-placeholder: #667a58;
  --kv-tab-bg: rgba(211, 231, 195, 0.82);
  --kv-tab-bg-active: rgba(74, 147, 78, 0.24);
  --kv-tab-text: #405c3c;
  --kv-tab-text-active: #1d6330;
  --kv-badge-bg: rgba(52, 127, 65, 0.18);
  --kv-badge-text: #1d6330;
  --kv-progress-bg: rgba(145, 173, 118, 0.46);
  --kv-progress-fill: linear-gradient(90deg, #347f41, #e3bd48);
  --kv-calendar-bg: linear-gradient(160deg, #eaf2d6, #d1e5c2);
  --kv-calendar-header-bg: linear-gradient(180deg, #d6e8c2, #c5dcb3);
  --kv-calendar-cell-bg: rgba(247, 243, 213, 0.93);
  --kv-calendar-cell-bg-hover: rgba(216, 234, 197, 0.98);
  --kv-calendar-cell-border: rgba(95, 141, 83, 0.42);
  --kv-calendar-today-bg: rgba(232, 194, 64, 0.28);
  --kv-calendar-today-border: rgba(184, 142, 32, 0.62);
  --kv-habit-card-bg: linear-gradient(160deg, rgba(255, 247, 218, 0.96), rgba(213, 234, 198, 0.98));
  --kv-habit-card-bg-hover: linear-gradient(160deg, rgba(255, 249, 224, 0.99), rgba(195, 223, 179, 0.99));
  --kv-stats-card-bg: linear-gradient(160deg, rgba(255, 247, 218, 0.96), rgba(214, 235, 199, 0.98));
  --kv-stats-card-bg-hover: linear-gradient(160deg, rgba(255, 249, 224, 0.99), rgba(196, 224, 181, 0.99));
  --kv-toggle-bg: rgba(145, 173, 118, 0.5);
  --kv-toggle-bg-active: linear-gradient(135deg, #347f41, #e3bd48);
  --kv-toggle-thumb-bg: #fff8dc;
  --kv-checkbox-bg: rgba(255, 250, 222, 0.92);
  --kv-checkbox-border: rgba(95, 141, 83, 0.64);
  --kv-disabled-bg: rgba(206, 224, 189, 0.78);
  --kv-disabled-text: #68765c;
  --kv-toast-bg: #fff7d9;
  --kv-toast-border: rgba(95, 141, 83, 0.54);
}

html[data-ui-skin="summer"] {
  color-scheme: light;
  --kv-ui-accent: #087f89;
  --kv-ui-accent-soft: rgba(8, 127, 137, 0.2);
  --kv-ui-surface-tint: rgba(8, 127, 137, 0.12);
  --kv-ui-border-tint: rgba(20, 129, 136, 0.36);
  --kv-ui-gradient-start: #74d6cf;
  --kv-ui-gradient-end: #e4aa31;
  --kv-app-bg: #e2f2ec;
  --kv-app-bg-gradient:
    radial-gradient(circle at 86% 4%, rgba(228, 170, 49, 0.38), transparent 25rem),
    radial-gradient(circle at 12% 24%, rgba(42, 169, 168, 0.28), transparent 27rem),
    linear-gradient(180deg, #f5e7bd 0%, #d8f0ec 48%, #bde2dd 100%);
  --kv-shell-bg: rgba(239, 235, 201, 0.96);
  --kv-sidebar-bg:
    radial-gradient(circle at 20% 0%, rgba(240, 188, 70, 0.24), transparent 18rem),
    linear-gradient(180deg, #f0e4be 0%, #bfe4dc 100%);
  --kv-topbar-bg: linear-gradient(135deg, rgba(246, 235, 199, 0.97), rgba(190, 230, 224, 0.94));
  --kv-surface: #fff3cb;
  --kv-surface-raised: #fff8dc;
  --kv-surface-soft: #cbe8df;
  --kv-surface-hover: #afdcd7;
  --kv-surface-active: #91d1d0;
  --kv-text: #12353a;
  --kv-text-muted: #385f60;
  --kv-text-soft: #637977;
  --kv-text-inverse: #fff4cf;
  --kv-border: #80bbb4;
  --kv-border-soft: #b9d9d2;
  --kv-border-strong: #2d969a;
  --kv-shadow-soft: 0 18px 34px -28px rgba(11, 85, 92, 0.32);
  --kv-shadow-raised: 0 30px 58px -40px rgba(8, 90, 96, 0.42);
  --kv-focus-ring: #149ca2;
  --kv-accent: #087f89;
  --kv-accent-hover: #0aa0a7;
  --kv-accent-active: #05636b;
  --kv-accent-soft: rgba(8, 127, 137, 0.2);
  --kv-accent-text: #075d65;
  --kv-btn-primary-bg: linear-gradient(135deg, #087f89 0%, #16aaa8 58%, #e4aa31 100%);
  --kv-btn-primary-bg-hover: linear-gradient(135deg, #08949f 0%, #22c0bd 56%, #efbd49 100%);
  --kv-btn-primary-text: #09282c;
  --kv-btn-secondary-bg: linear-gradient(135deg, rgba(255, 242, 200, 0.84), rgba(190, 227, 221, 0.88));
  --kv-btn-secondary-bg-hover: linear-gradient(135deg, rgba(252, 230, 178, 0.98), rgba(167, 217, 211, 0.98));
  --kv-btn-secondary-text: #173d41;
  --kv-btn-danger-bg: #bd6255;
  --kv-btn-danger-bg-hover: #d07062;
  --kv-btn-danger-text: #fff7ee;
  --kv-success: #3b9a72;
  --kv-success-soft: rgba(59, 154, 114, 0.18);
  --kv-warning: #cf9230;
  --kv-warning-soft: rgba(207, 146, 48, 0.2);
  --kv-danger: #bd6255;
  --kv-danger-soft: rgba(189, 98, 85, 0.16);
  --kv-info: #087f89;
  --kv-info-soft: rgba(8, 127, 137, 0.16);
  --kv-card-bg:
    radial-gradient(circle at 86% 0%, rgba(228, 170, 49, 0.18), transparent 13rem),
    linear-gradient(160deg, rgba(255, 245, 210, 0.97), rgba(203, 233, 226, 0.98));
  --kv-card-bg-hover:
    radial-gradient(circle at 86% 0%, rgba(228, 170, 49, 0.24), transparent 14rem),
    linear-gradient(160deg, rgba(255, 248, 218, 0.99), rgba(182, 223, 216, 0.99));
  --kv-card-border: rgba(45, 150, 154, 0.5);
  --kv-modal-bg: linear-gradient(180deg, #fff3cb, #cae9e2);
  --kv-modal-border: rgba(45, 150, 154, 0.56);
  --kv-popover-bg: linear-gradient(180deg, rgb(255, 243, 205), rgb(201, 232, 225));
  --kv-popover-border: rgba(45, 150, 154, 0.58);
  --kv-input-bg: rgba(255, 247, 219, 0.9);
  --kv-input-border: rgba(45, 150, 154, 0.62);
  --kv-input-focus-border: #149ca2;
  --kv-input-placeholder: #647d78;
  --kv-tab-bg: rgba(200, 232, 224, 0.82);
  --kv-tab-bg-active: rgba(8, 127, 137, 0.24);
  --kv-tab-text: #385f60;
  --kv-tab-text-active: #075d65;
  --kv-badge-bg: rgba(8, 127, 137, 0.18);
  --kv-badge-text: #075d65;
  --kv-progress-bg: rgba(128, 187, 180, 0.48);
  --kv-progress-fill: linear-gradient(90deg, #087f89, #e4aa31);
  --kv-calendar-bg: linear-gradient(160deg, #f1e5bd, #c0e4dd);
  --kv-calendar-header-bg: linear-gradient(180deg, #efdca7, #b8ded8);
  --kv-calendar-cell-bg: rgba(255, 244, 206, 0.94);
  --kv-calendar-cell-bg-hover: rgba(182, 222, 216, 0.98);
  --kv-calendar-cell-border: rgba(45, 150, 154, 0.42);
  --kv-calendar-today-bg: rgba(228, 170, 49, 0.3);
  --kv-calendar-today-border: rgba(194, 126, 30, 0.64);
  --kv-habit-card-bg: linear-gradient(160deg, rgba(255, 241, 202, 0.96), rgba(195, 230, 223, 0.98));
  --kv-habit-card-bg-hover: linear-gradient(160deg, rgba(255, 245, 212, 0.99), rgba(176, 219, 212, 0.99));
  --kv-stats-card-bg: linear-gradient(160deg, rgba(255, 241, 202, 0.96), rgba(195, 230, 223, 0.98));
  --kv-stats-card-bg-hover: linear-gradient(160deg, rgba(255, 245, 212, 0.99), rgba(176, 219, 212, 0.99));
  --kv-toggle-bg: rgba(128, 187, 180, 0.5);
  --kv-toggle-bg-active: linear-gradient(135deg, #087f89, #e4aa31);
  --kv-toggle-thumb-bg: #fff3cb;
  --kv-checkbox-bg: rgba(255, 246, 218, 0.92);
  --kv-checkbox-border: rgba(45, 150, 154, 0.64);
  --kv-disabled-bg: rgba(198, 225, 219, 0.78);
  --kv-disabled-text: #667c78;
  --kv-toast-bg: #fff3cb;
  --kv-toast-border: rgba(45, 150, 154, 0.54);
}

html[data-ui-skin="autumn"] {
  color-scheme: dark;
  --kv-app-bg: #120c08;
  --kv-app-bg-gradient:
    radial-gradient(circle at 10% 6%, rgba(142, 72, 33, 0.44), transparent 27rem),
    radial-gradient(circle at 88% 10%, rgba(221, 164, 61, 0.18), transparent 24rem),
    radial-gradient(circle at 52% 110%, rgba(91, 45, 24, 0.48), transparent 36rem),
    linear-gradient(180deg, #21130c 0%, #140c08 48%, #0a0604 100%);
  --kv-shell-bg: rgba(39, 24, 15, 0.96);
  --kv-sidebar-bg:
    radial-gradient(circle at 18% 0%, rgba(221, 164, 61, 0.16), transparent 18rem),
    linear-gradient(180deg, #2a1a11 0%, #140c08 100%);
  --kv-topbar-bg: linear-gradient(135deg, rgba(55, 35, 22, 0.96), rgba(27, 16, 10, 0.94));
  --kv-surface: #2a1a11;
  --kv-surface-raised: #37241a;
  --kv-surface-soft: #20130d;
  --kv-surface-hover: #452c1d;
  --kv-surface-active: #563620;
  --kv-text: #f8ead4;
  --kv-text-muted: #d0b58d;
  --kv-text-soft: #ab8c66;
  --kv-border: #704524;
  --kv-border-soft: rgba(172, 107, 54, 0.38);
  --kv-border-strong: #b87538;
  --kv-accent: #d58a3f;
  --kv-accent-hover: #f0a650;
  --kv-accent-active: #a95a2f;
  --kv-accent-text: #ffd79a;
  --kv-card-bg:
    radial-gradient(circle at 12% 0%, rgba(221, 164, 61, 0.13), transparent 14rem),
    linear-gradient(160deg, rgba(59, 39, 27, 0.97), rgba(30, 19, 13, 0.99));
  --kv-card-bg-hover:
    radial-gradient(circle at 14% 0%, rgba(221, 164, 61, 0.18), transparent 15rem),
    linear-gradient(160deg, rgba(70, 46, 31, 0.99), rgba(36, 23, 15, 0.99));
  --kv-card-border: rgba(190, 118, 50, 0.5);
  --kv-calendar-bg: linear-gradient(160deg, #2b1a11, #1a100b);
  --kv-calendar-header-bg: linear-gradient(180deg, #4b2f1f, #2a1a11);
  --kv-calendar-cell-bg: rgba(50, 31, 20, 0.9);
  --kv-calendar-cell-bg-hover: rgba(78, 49, 29, 0.96);
  --kv-calendar-cell-border: rgba(184, 116, 55, 0.4);
  --kv-calendar-today-bg: rgba(221, 164, 61, 0.24);
  --kv-calendar-today-border: rgba(221, 164, 61, 0.68);
  --kv-habit-card-bg:
    radial-gradient(circle at 12% 0%, rgba(221, 164, 61, 0.12), transparent 14rem),
    linear-gradient(160deg, rgba(56, 36, 24, 0.98), rgba(29, 18, 12, 0.99));
  --kv-habit-card-bg-hover:
    radial-gradient(circle at 14% 0%, rgba(221, 164, 61, 0.18), transparent 15rem),
    linear-gradient(160deg, rgba(70, 45, 29, 0.99), rgba(36, 22, 15, 0.99));
}

html[data-ui-skin="winter"] {
  color-scheme: light;
  --kv-ui-accent: #2f77a8;
  --kv-ui-accent-soft: rgba(47, 119, 168, 0.2);
  --kv-ui-surface-tint: rgba(89, 142, 176, 0.12);
  --kv-ui-border-tint: rgba(89, 142, 176, 0.36);
  --kv-ui-gradient-start: #e7f4fb;
  --kv-ui-gradient-end: #2f77a8;
  --kv-app-bg: #e5eff5;
  --kv-app-bg-gradient:
    radial-gradient(circle at 18% 0%, rgba(255, 255, 255, 0.9), transparent 24rem),
    radial-gradient(circle at 86% 15%, rgba(76, 140, 181, 0.24), transparent 27rem),
    linear-gradient(180deg, #f9fcff 0%, #dbeaf2 47%, #c8dce8 100%);
  --kv-shell-bg: rgba(240, 248, 252, 0.96);
  --kv-sidebar-bg:
    radial-gradient(circle at 18% 0%, rgba(255, 255, 255, 0.84), transparent 15rem),
    linear-gradient(180deg, #edf7fc 0%, #c9dce8 100%);
  --kv-topbar-bg: linear-gradient(135deg, rgba(247, 252, 255, 0.97), rgba(212, 231, 241, 0.94));
  --kv-surface: #f2f7fa;
  --kv-surface-raised: #ffffff;
  --kv-surface-soft: #d9e8f0;
  --kv-surface-hover: #c6dbe7;
  --kv-surface-active: #b3d0df;
  --kv-text: #122f3d;
  --kv-text-muted: #405d6d;
  --kv-text-soft: #667b88;
  --kv-text-inverse: #f8fcff;
  --kv-border: #8fb5ca;
  --kv-border-soft: #c6d9e4;
  --kv-border-strong: #4d8ab0;
  --kv-shadow-soft: 0 18px 34px -28px rgba(32, 74, 103, 0.3);
  --kv-shadow-raised: 0 30px 58px -40px rgba(32, 77, 108, 0.4);
  --kv-focus-ring: #2f77a8;
  --kv-accent: #2f77a8;
  --kv-accent-hover: #3f8fc0;
  --kv-accent-active: #215c84;
  --kv-accent-soft: rgba(47, 119, 168, 0.2);
  --kv-accent-text: #245f87;
  --kv-btn-primary-bg: linear-gradient(135deg, #2f77a8 0%, #5ba3ca 62%, #dcebf3 100%);
  --kv-btn-primary-bg-hover: linear-gradient(135deg, #3586ba 0%, #6ab4d6 58%, #eef8fc 100%);
  --kv-btn-primary-text: #0e2734;
  --kv-btn-secondary-bg: linear-gradient(135deg, rgba(255, 255, 255, 0.86), rgba(207, 225, 235, 0.9));
  --kv-btn-secondary-bg-hover: linear-gradient(135deg, rgba(248, 252, 255, 0.98), rgba(190, 213, 227, 0.98));
  --kv-btn-secondary-text: #183948;
  --kv-btn-danger-bg: #b65d66;
  --kv-btn-danger-bg-hover: #c97078;
  --kv-btn-danger-text: #fff8f9;
  --kv-success: #4d917f;
  --kv-success-soft: rgba(77, 145, 127, 0.17);
  --kv-warning: #b49343;
  --kv-warning-soft: rgba(180, 147, 67, 0.18);
  --kv-danger: #b65d66;
  --kv-danger-soft: rgba(182, 93, 102, 0.16);
  --kv-info: #2f77a8;
  --kv-info-soft: rgba(47, 119, 168, 0.16);
  --kv-card-bg:
    radial-gradient(circle at 14% 0%, rgba(255, 255, 255, 0.58), transparent 13rem),
    linear-gradient(160deg, rgba(249, 253, 255, 0.98), rgba(218, 232, 240, 0.99));
  --kv-card-bg-hover:
    radial-gradient(circle at 14% 0%, rgba(255, 255, 255, 0.76), transparent 14rem),
    linear-gradient(160deg, rgba(255, 255, 255, 0.99), rgba(199, 220, 232, 0.99));
  --kv-card-border: rgba(77, 138, 176, 0.5);
  --kv-modal-bg: linear-gradient(180deg, #fbfeff, #d9e8f0);
  --kv-modal-border: rgba(77, 138, 176, 0.56);
  --kv-popover-bg: linear-gradient(180deg, rgb(252, 254, 255), rgb(215, 230, 239));
  --kv-popover-border: rgba(77, 138, 176, 0.58);
  --kv-input-bg: rgba(255, 255, 255, 0.9);
  --kv-input-border: rgba(77, 138, 176, 0.62);
  --kv-input-focus-border: #2f77a8;
  --kv-input-placeholder: #6b7f8c;
  --kv-tab-bg: rgba(213, 230, 239, 0.84);
  --kv-tab-bg-active: rgba(47, 119, 168, 0.24);
  --kv-tab-text: #405d6d;
  --kv-tab-text-active: #245f87;
  --kv-badge-bg: rgba(47, 119, 168, 0.18);
  --kv-badge-text: #245f87;
  --kv-progress-bg: rgba(143, 181, 202, 0.48);
  --kv-progress-fill: linear-gradient(90deg, #2f77a8, #9fd0ea);
  --kv-calendar-bg: linear-gradient(160deg, #e4f0f6, #cddfeb);
  --kv-calendar-header-bg: linear-gradient(180deg, #d6e7f0, #c1d6e3);
  --kv-calendar-cell-bg: rgba(246, 251, 254, 0.94);
  --kv-calendar-cell-bg-hover: rgba(202, 223, 235, 0.98);
  --kv-calendar-cell-border: rgba(77, 138, 176, 0.42);
  --kv-calendar-today-bg: rgba(159, 208, 234, 0.44);
  --kv-calendar-today-border: rgba(47, 119, 168, 0.66);
  --kv-habit-card-bg: linear-gradient(160deg, rgba(252, 254, 255, 0.98), rgba(214, 229, 238, 0.99));
  --kv-habit-card-bg-hover: linear-gradient(160deg, rgba(255, 255, 255, 0.99), rgba(196, 218, 231, 0.99));
  --kv-stats-card-bg: linear-gradient(160deg, rgba(252, 254, 255, 0.98), rgba(214, 229, 238, 0.99));
  --kv-stats-card-bg-hover: linear-gradient(160deg, rgba(255, 255, 255, 0.99), rgba(196, 218, 231, 0.99));
  --kv-toggle-bg: rgba(143, 181, 202, 0.52);
  --kv-toggle-bg-active: linear-gradient(135deg, #2f77a8, #9fd0ea);
  --kv-toggle-thumb-bg: #fbfeff;
  --kv-checkbox-bg: rgba(255, 255, 255, 0.94);
  --kv-checkbox-border: rgba(77, 138, 176, 0.64);
  --kv-disabled-bg: rgba(211, 226, 235, 0.78);
  --kv-disabled-text: #687d8a;
  --kv-toast-bg: #fbfeff;
  --kv-toast-border: rgba(77, 138, 176, 0.54);
}

/* Calendar semantic state contract for premium seasonal skins. */
html[data-ui-skin="spring"] {
  --kv-calendar-toolbar-bg: linear-gradient(135deg, #eef0c5, #cfe5bd);
  --kv-calendar-header-text: #244820;
  --kv-calendar-sticky-bg: #d8e9c3;
  --kv-calendar-sticky-row-bg: #eef0c9;
  --kv-calendar-sticky-category-bg: #bed9aa;
  --kv-calendar-sticky-border: #789961;
  --kv-calendar-grid-bg: #cfdfb7;
  --kv-calendar-cell-bg: #f4edc8;
  --kv-calendar-cell-bg-hover: #d6ecc7;
  --kv-calendar-cell-border: rgba(95, 141, 83, 0.5);
  --kv-calendar-cell-future-bg: #e8e4c3;
  --kv-calendar-cell-future-border: rgba(135, 154, 106, 0.48);
  --kv-calendar-cell-disabled-bg: #d7e0c3;
  --kv-calendar-cell-completed-bg: #b7db9b;
  --kv-calendar-cell-completed-border: #3f8a49;
  --kv-calendar-cell-missed-bg: #f1c1ad;
  --kv-calendar-cell-missed-border: #b85f50;
  --kv-calendar-cell-planned-bg: #efe0a1;
  --kv-calendar-cell-planned-border: #b78e24;
  --kv-calendar-today-bg: #f1d866;
  --kv-calendar-today-border: #9c7a1d;
  --kv-calendar-cell-selected-bg: #cae8b8;
  --kv-calendar-cell-selected-border: #347f41;
  --kv-calendar-check-bg: #347f41;
  --kv-calendar-check-border: #265f32;
  --kv-calendar-check-icon: #fff8dc;
  --kv-calendar-metric-bg: #eaf1cf;
  --kv-calendar-metric-text: #16311f;
  --kv-calendar-muted-text: #5a704e;
  --kv-calendar-row-divider: rgba(95, 141, 83, 0.42);
  --kv-calendar-category-accent: #347f41;
}

html[data-ui-skin="summer"] {
  --kv-calendar-toolbar-bg: linear-gradient(135deg, #f4dfab, #b6e3dc);
  --kv-calendar-header-text: #123f42;
  --kv-calendar-sticky-bg: #c8e1d7;
  --kv-calendar-sticky-row-bg: #f0dfb6;
  --kv-calendar-sticky-category-bg: #a7d9d1;
  --kv-calendar-sticky-border: #2d969a;
  --kv-calendar-grid-bg: #b7dcd5;
  --kv-calendar-cell-bg: #fff0bc;
  --kv-calendar-cell-bg-hover: #abe2dc;
  --kv-calendar-cell-border: rgba(45, 150, 154, 0.52);
  --kv-calendar-cell-future-bg: #eadfb9;
  --kv-calendar-cell-future-border: rgba(97, 150, 143, 0.48);
  --kv-calendar-cell-disabled-bg: #d3ded2;
  --kv-calendar-cell-completed-bg: #9fddd5;
  --kv-calendar-cell-completed-border: #087f89;
  --kv-calendar-cell-missed-bg: #f3b7a5;
  --kv-calendar-cell-missed-border: #bd6255;
  --kv-calendar-cell-planned-bg: #efd180;
  --kv-calendar-cell-planned-border: #b8771b;
  --kv-calendar-today-bg: #f0bf4e;
  --kv-calendar-today-border: #9d6417;
  --kv-calendar-cell-selected-bg: #b7e6df;
  --kv-calendar-cell-selected-border: #087f89;
  --kv-calendar-check-bg: #087f89;
  --kv-calendar-check-border: #05636b;
  --kv-calendar-check-icon: #fff7df;
  --kv-calendar-metric-bg: #dcebd8;
  --kv-calendar-metric-text: #12353a;
  --kv-calendar-muted-text: #4f6b68;
  --kv-calendar-row-divider: rgba(45, 150, 154, 0.42);
  --kv-calendar-category-accent: #087f89;
}

html[data-ui-skin="autumn"] {
  --kv-calendar-toolbar-bg: linear-gradient(135deg, #4a2d1c, #25150e);
  --kv-calendar-header-text: #f6dfba;
  --kv-calendar-sticky-bg: #2f1d13;
  --kv-calendar-sticky-row-bg: #3a2518;
  --kv-calendar-sticky-category-bg: #4a2d1c;
  --kv-calendar-sticky-border: #9f6230;
  --kv-calendar-grid-bg: #21140d;
  --kv-calendar-cell-bg: #321f14;
  --kv-calendar-cell-bg-hover: #55341f;
  --kv-calendar-cell-border: rgba(184, 116, 55, 0.5);
  --kv-calendar-cell-future-bg: #241711;
  --kv-calendar-cell-future-border: rgba(128, 80, 43, 0.5);
  --kv-calendar-cell-disabled-bg: #20140f;
  --kv-calendar-cell-completed-bg: #7c5827;
  --kv-calendar-cell-completed-border: #d58a3f;
  --kv-calendar-cell-missed-bg: #633025;
  --kv-calendar-cell-missed-border: #b5533e;
  --kv-calendar-cell-planned-bg: #5e4521;
  --kv-calendar-cell-planned-border: #d9a441;
  --kv-calendar-today-bg: #8c5f24;
  --kv-calendar-today-border: #efbd66;
  --kv-calendar-cell-selected-bg: #68401f;
  --kv-calendar-cell-selected-border: #f0a650;
  --kv-calendar-check-bg: #d58a3f;
  --kv-calendar-check-border: #f0a650;
  --kv-calendar-check-icon: #170d07;
  --kv-calendar-metric-bg: #4b2f1f;
  --kv-calendar-metric-text: #f8ead4;
  --kv-calendar-muted-text: #d0b58d;
  --kv-calendar-row-divider: rgba(184, 116, 55, 0.44);
  --kv-calendar-category-accent: #d58a3f;
}

html[data-ui-skin="winter"] {
  --kv-calendar-toolbar-bg: linear-gradient(135deg, #e7f4fb, #c6dce9);
  --kv-calendar-header-text: #16394e;
  --kv-calendar-sticky-bg: #dceaf2;
  --kv-calendar-sticky-row-bg: #eef6fb;
  --kv-calendar-sticky-category-bg: #c7ddeb;
  --kv-calendar-sticky-border: #5e94bd;
  --kv-calendar-grid-bg: #cfdfeb;
  --kv-calendar-cell-bg: #f7fbfd;
  --kv-calendar-cell-bg-hover: #cfe6f3;
  --kv-calendar-cell-border: rgba(77, 138, 176, 0.52);
  --kv-calendar-cell-future-bg: #edf2f5;
  --kv-calendar-cell-future-border: rgba(113, 148, 170, 0.5);
  --kv-calendar-cell-disabled-bg: #dce7ed;
  --kv-calendar-cell-completed-bg: #c0e4f0;
  --kv-calendar-cell-completed-border: #2f77a8;
  --kv-calendar-cell-missed-bg: #eec4c8;
  --kv-calendar-cell-missed-border: #b65d66;
  --kv-calendar-cell-planned-bg: #efe2b8;
  --kv-calendar-cell-planned-border: #9d7e2d;
  --kv-calendar-today-bg: #a8d4ed;
  --kv-calendar-today-border: #245f87;
  --kv-calendar-cell-selected-bg: #bdddf0;
  --kv-calendar-cell-selected-border: #2f77a8;
  --kv-calendar-check-bg: #2f77a8;
  --kv-calendar-check-border: #215c84;
  --kv-calendar-check-icon: #f8fcff;
  --kv-calendar-metric-bg: #e4eef4;
  --kv-calendar-metric-text: #122f3d;
  --kv-calendar-muted-text: #4b6574;
  --kv-calendar-row-divider: rgba(77, 138, 176, 0.44);
  --kv-calendar-category-accent: #2f77a8;
}

/* ============================================
   2. LIGHT THEME - Material Premium
   ============================================ */

:root,
[data-theme="light"] {
  /* === BACKGROUNDS - Editorial ivory === */
  --bg-base: #f5efe5;
  --bg-elevated: #fcf8f1;
  --bg-sunken: #eadfce;
  --bg-overlay: rgb(252 247 239 / 0.92);
  
  /* === SURFACES - Refined warm layers === */
  --surface-primary: #fffdfa;
  --surface-secondary: #fcf7ef;
  --surface-tertiary: #f4ecdf;
  --surface-elevated: #fffaf2;
  --surface-interactive: #fdf7ee;
  --surface-interactive-hover: #f2e7d7;
  
  /* === TEXT - Warm editorial contrast === */
  --text-primary: #201811;
  --text-secondary: #4b4033;
  --text-tertiary: #6b5c4d;
  --text-muted: #8a7867;
  --text-inverse: #ffffff;
  --text-accent: #764d19;
  
  /* === BORDERS - Soft but intentional === */
  --border-default: #d5c4ad;
  --border-subtle: #efe4d6;
  --border-strong: #b89f7f;
  --border-interactive: #c8b292;
  --border-accent: #bf8a43;
  --border-week: rgba(91, 122, 153, 0.24);
  --border-month: rgba(64, 91, 128, 0.72);
  
  /* === INTERACTIVE === */
  --interactive-hover: #f4eadb;
  --interactive-active: #e9dcc7;
  --interactive-focus: #b8732f;
  
  /* === ACCENT === */
  --accent-bg: #f6ecdc;
  --accent-bg-hover: #efdfc3;
  --accent-text: #764d19;
  --accent-border: #bf8a43;
  
  /* === COMPONENTS === */
  --input-bg: #fffdfa;
  --input-border: #d3c0a8;
  --input-focus-ring: #b8732f;
  
  --button-primary-bg: #f59e0b;
  --button-primary-text: #2b1906;
  --button-primary-hover: #f7ad1f;
  --button-create-bg: linear-gradient(180deg, rgba(255, 215, 92, 0.96) 0%, rgba(255, 191, 43, 0.92) 54%, rgba(248, 153, 4, 0.9) 100%);
  --button-create-hover: linear-gradient(180deg, rgba(255, 223, 108, 0.98) 0%, rgba(255, 198, 58, 0.95) 50%, rgba(250, 161, 16, 0.92) 100%);
  --button-create-text: #fff9ee;
  --button-create-border: rgba(228, 146, 16, 0.58);
  --button-create-shadow: 0 16px 28px -20px rgba(255, 161, 21, 0.26), 0 8px 14px -10px rgba(153, 90, 13, 0.12);
  --button-create-shadow-hover: 0 20px 30px -20px rgba(255, 166, 20, 0.3), 0 10px 16px -10px rgba(153, 90, 13, 0.14);
  --button-create-ring: rgba(255, 179, 28, 0.28);
  --button-template-bg: linear-gradient(180deg, rgba(255, 255, 255, 0.985) 0%, rgba(248, 251, 255, 0.995) 48%, rgba(236, 243, 251, 0.985) 100%);
  --button-template-text: #35506f;
  --button-template-border: rgba(151, 181, 221, 0.46);
  --button-template-shadow: 0 16px 28px -24px rgba(102, 143, 193, 0.16), 0 8px 14px -12px rgba(73, 108, 149, 0.08);
  --button-template-shadow-hover: 0 20px 32px -24px rgba(102, 143, 193, 0.2), 0 10px 16px -12px rgba(73, 108, 149, 0.1);
  --button-template-ring: rgba(108, 159, 230, 0.18);
  --button-template-sheen: linear-gradient(180deg, rgba(255, 255, 255, 0.54) 0%, rgba(255, 255, 255, 0.18) 26%, rgba(255, 255, 255, 0) 56%);
  --button-template-glow: radial-gradient(138% 148% at 16% 12%, rgba(255, 255, 255, 0.96) 0%, rgba(233, 245, 255, 0.38) 28%, rgba(233, 245, 255, 0) 58%), radial-gradient(112% 118% at 82% 100%, rgba(181, 214, 246, 0.18) 0%, rgba(181, 214, 246, 0) 46%);
  --button-template-highlight: linear-gradient(115deg, rgba(255, 255, 255, 0) 0%, rgba(255, 255, 255, 0.12) 16%, rgba(255, 255, 255, 0.84) 40%, rgba(226, 242, 255, 0.9) 48%, rgba(180, 218, 248, 0.42) 58%, rgba(255, 255, 255, 0.08) 74%, rgba(255, 255, 255, 0) 100%);
  --button-template-highlight-opacity: 0.96;
  
  /* === ELEVATION SYSTEM - Controlled premium depth === */
  --shadow-xs: 0 1px 2px rgb(56 39 13 / 0.05);
  --shadow-sm: 0 14px 28px -22px rgb(56 39 13 / 0.2), 0 5px 10px rgb(56 39 13 / 0.06);
  --shadow-md: 0 24px 44px -30px rgb(56 39 13 / 0.24), 0 14px 22px -16px rgb(56 39 13 / 0.09);
  --shadow-lg: 0 34px 62px -38px rgb(56 39 13 / 0.28), 0 20px 32px -24px rgb(56 39 13 / 0.11);
  --shadow-xl: 0 46px 82px -46px rgb(56 39 13 / 0.32), 0 26px 40px -28px rgb(56 39 13 / 0.13);
  
  /* Card elevation: border + shadow = object */
  --card-shadow: 0 28px 52px -38px rgb(54 38 13 / 0.18), 0 16px 24px -18px rgb(54 38 13 / 0.08);
  --card-border: #e0d1be;
  --card-hover-shadow: 0 34px 64px -38px rgb(54 38 13 / 0.22), 0 20px 30px -22px rgb(54 38 13 / 0.1);
  
  /* === SCROLLBAR === */
  --scrollbar-track: #e7dfd4;
  --scrollbar-thumb: #cabfad;
  --scrollbar-thumb-hover: #aa9f90;
  
  /* === RITUAL/PARCHMENT TOKENS === */
  --parchment-bg: linear-gradient(145deg, #fffdf9 0%, #f7efe2 52%, #eee3d3 100%);
  --parchment-border: #d4c4ad;
  --parchment-shadow: 0 18px 36px -28px rgb(57 39 11 / 0.24), 0 6px 14px -12px rgb(57 39 11 / 0.12);
  --parchment-shadow-hover: 0 28px 48px -30px rgb(57 39 11 / 0.3), 0 12px 24px -18px rgb(57 39 11 / 0.14);
  --seal-glow: 0 0 20px rgba(226, 171, 69, 0.24);
  --ritual-accent: linear-gradient(135deg, #f0c97c 0%, #d6a74b 50%, #ba8a2d 100%);
}

/* === LIGHT THEME - Component Styles === */

/* Body/Page: Solid warm background with subtle texture */
[data-theme="light"] body,
[data-theme="light"] .app-page {
  background: 
    radial-gradient(circle at 14% 0%, rgba(255, 255, 255, 0.88) 0%, transparent 34%),
    radial-gradient(circle at 88% 8%, rgba(234, 197, 138, 0.16) 0%, transparent 24%),
    radial-gradient(circle at 50% 100%, rgba(255, 254, 250, 0.56) 0%, transparent 44%),
    linear-gradient(180deg, #fbf7f0 0%, #f2eadf 55%, #e9dfd0 100%);
}

/* CARDS: White objects floating on sand */
[data-theme="light"] .card,
[data-theme="light"] .app-card {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.992) 0%, rgba(255, 252, 247, 0.99) 58%, rgba(249, 241, 231, 0.994) 100%);
  border: 1px solid color-mix(in srgb, var(--card-border) 44%, transparent);
  box-shadow:
    var(--card-shadow),
    inset 0 1px 0 rgba(255, 255, 255, 0.54);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

[data-theme="light"] .card:hover,
[data-theme="light"] .app-card:hover {
  box-shadow: var(--card-hover-shadow);
  transform: translateY(-1px);
}

[data-theme="light"] .app-card-header,
[data-theme="light"] .card-header {
  border-bottom-color: color-mix(in srgb, var(--border-subtle) 52%, transparent);
}

[data-theme="light"] .app-card-footer,
[data-theme="light"] .card-footer {
  border-top-color: color-mix(in srgb, var(--border-subtle) 52%, transparent);
  background:
    linear-gradient(180deg,
      color-mix(in srgb, var(--surface-secondary) 74%, rgba(255, 255, 255, 0.84)) 0%,
      color-mix(in srgb, var(--surface-primary) 96%, transparent) 100%);
}

/* HEADER TOP: Elevated white bar */
[data-theme="light"] .app-header {
  background: rgb(255 252 247 / 0.9);
  backdrop-filter: blur(18px) saturate(1.05);
  border-bottom: 1px solid color-mix(in srgb, var(--border-default) 84%, transparent);
  box-shadow: 0 20px 38px -32px rgb(54 38 13 / 0.18), 0 12px 20px -18px rgb(54 38 13 / 0.08);
}

/* SIDEBAR LEFT: Elevated white panel */
[data-theme="light"] .app-sidebar {
  background:
    linear-gradient(180deg, rgba(255, 254, 250, 0.98) 0%, rgba(251, 245, 236, 0.98) 100%);
  border-right: 1px solid color-mix(in srgb, var(--border-default) 74%, transparent);
  box-shadow: 20px 0 38px -36px rgb(54 38 13 / 0.18), 8px 0 16px -18px rgb(54 38 13 / 0.05);
}

/* AUTH CARD: Prominent elevation */
[data-theme="light"] .auth-card {
  background: #ffffff;
  border: 1px solid var(--border-default);
  box-shadow: var(--shadow-xl);
}

/* INPUTS: Inset feeling */
[data-theme="light"] .form-input,
[data-theme="light"] .form-select,
[data-theme="light"] .form-textarea {
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  box-shadow: inset 0 1px 2px rgb(57 39 11 / 0.03);
}

[data-theme="light"] .form-input:focus,
[data-theme="light"] .form-select:focus,
[data-theme="light"] .form-textarea:focus {
  border-color: var(--accent-500);
  box-shadow: 
    inset 0 1px 2px rgb(57 39 11 / 0.03),
    0 0 0 3px rgba(226, 171, 69, 0.16);
}

/* BUTTONS */
[data-theme="light"] .btn-primary:not(.btn-create) {
  box-shadow: 0 16px 26px -22px rgba(245, 158, 11, 0.26), 0 8px 14px -10px rgba(120, 71, 10, 0.1);
}

[data-theme="light"] .btn-primary:not(.btn-create):hover:not(:disabled) {
  box-shadow: 0 20px 30px -22px rgba(245, 158, 11, 0.3), 0 10px 16px -10px rgba(120, 71, 10, 0.12);
  transform: translateY(-1px);
}

/* NAV LINKS */
[data-theme="light"] .nav-link:hover,
[data-theme="light"] .header-nav-link:hover,
[data-theme="light"] .sidebar-nav-link:hover {
  background: var(--interactive-hover);
}

[data-theme="light"] .nav-link.active,
[data-theme="light"] .sidebar-nav-link.active {
  background: var(--accent-bg);
  border-left: 3px solid var(--accent-500);
}

/* DROPDOWNS & MENUS */
[data-theme="light"] .dropdown-menu,
[data-theme="light"] .popover {
  background: #ffffff;
  border: 1px solid var(--border-default);
  box-shadow: var(--shadow-lg);
}

/* TABLE ROWS */
[data-theme="light"] .table-row:hover,
[data-theme="light"] tr:hover {
  background: var(--interactive-hover);
}

/* MODAL */
[data-theme="light"] .modal-content {
  background: #ffffff;
  border: 1px solid var(--border-default);
  box-shadow: var(--shadow-xl);
}

/* SCROLLBAR */
[data-theme="light"] ::-webkit-scrollbar-thumb {
  background: var(--scrollbar-thumb);
  border: 2px solid var(--bg-base);
}

/* ============================================
   3. DARK THEME
   ============================================ */

[data-theme="dark"],
body.dark-theme {
  /* Backgrounds - Layered, not flat black */
  --bg-base: var(--neutral-925);
  --bg-elevated: var(--neutral-850);
  --bg-sunken: var(--neutral-950);
  --bg-overlay: rgb(0 0 0 / 0.6);
  
  /* Surfaces (Cards, Panels) */
  --surface-primary: var(--neutral-850);
  --surface-secondary: var(--neutral-800);
  --surface-tertiary: var(--neutral-700);
  --surface-elevated: #2f2f35;
  --surface-interactive: var(--neutral-800);
  --surface-interactive-hover: var(--neutral-700);
  
  /* Text Colors */
  --text-primary: var(--neutral-50);
  --text-secondary: var(--neutral-300);
  --text-tertiary: var(--neutral-400);
  --text-muted: var(--neutral-500);
  --text-inverse: var(--neutral-900);
  --text-accent: var(--accent-400);
  
  /* Border Colors */
  --border-default: var(--neutral-700);
  --border-subtle: var(--neutral-800);
  --border-strong: var(--neutral-600);
  --border-interactive: var(--neutral-600);
  --border-accent: var(--accent-500);
  --border-week: rgba(148, 163, 184, 0.24);
  --border-month: rgba(148, 163, 184, 0.68);
  
  /* Interactive States */
  --interactive-hover: var(--neutral-700);
  --interactive-active: var(--neutral-600);
  --interactive-focus: var(--accent-500);
  
  /* Accent Variants */
  --accent-bg: rgb(251 191 36 / 0.1);
  --accent-bg-hover: rgb(251 191 36 / 0.15);
  --accent-text: var(--accent-400);
  --accent-border: var(--accent-600);
  
  /* Component Specific */
  --input-bg: var(--neutral-800);
  --input-border: var(--neutral-600);
  --input-focus-ring: var(--accent-500);
  
  --button-primary-bg: var(--accent-500);
  --button-primary-text: var(--neutral-900);
  --button-primary-hover: var(--accent-400);
  --button-create-bg: linear-gradient(180deg, rgba(255, 209, 78, 0.95) 0%, rgba(255, 182, 23, 0.9) 54%, rgba(243, 138, 0, 0.88) 100%);
  --button-create-hover: linear-gradient(180deg, rgba(255, 217, 96, 0.97) 0%, rgba(255, 190, 38, 0.93) 50%, rgba(246, 148, 8, 0.9) 100%);
  --button-create-text: #fff8ea;
  --button-create-border: rgba(255, 184, 48, 0.42);
  --button-create-shadow: 0 14px 26px -18px rgba(255, 148, 0, 0.3), 0 10px 16px -12px rgba(0, 0, 0, 0.3);
  --button-create-shadow-hover: 0 18px 30px -18px rgba(255, 155, 0, 0.34), 0 12px 18px -12px rgba(0, 0, 0, 0.34);
  --button-create-ring: rgba(255, 184, 52, 0.22);
  --button-template-bg: linear-gradient(180deg, rgba(38, 49, 68, 0.96) 0%, rgba(43, 59, 86, 0.98) 48%, rgba(48, 75, 111, 1) 100%);
  --button-template-text: #eef6ff;
  --button-template-border: rgba(130, 177, 241, 0.42);
  --button-template-shadow: 0 14px 24px -18px rgba(69, 118, 189, 0.26), 0 10px 16px -12px rgba(0, 0, 0, 0.32);
  --button-template-shadow-hover: 0 18px 28px -18px rgba(88, 141, 220, 0.34), 0 12px 18px -12px rgba(0, 0, 0, 0.36);
  --button-template-ring: rgba(130, 177, 246, 0.22);
  --button-template-sheen: linear-gradient(180deg, rgba(236, 246, 255, 0.13) 0%, rgba(236, 246, 255, 0.05) 28%, rgba(236, 246, 255, 0) 58%);
  --button-template-glow: radial-gradient(140% 150% at 16% 12%, rgba(230, 242, 255, 0.2) 0%, rgba(146, 196, 250, 0.12) 30%, rgba(146, 196, 250, 0) 60%), radial-gradient(120% 126% at 84% 100%, rgba(112, 165, 236, 0.16) 0%, rgba(112, 165, 236, 0) 48%);
  --button-template-highlight: linear-gradient(115deg, rgba(255, 255, 255, 0) 0%, rgba(255, 255, 255, 0.02) 14%, rgba(207, 233, 255, 0.24) 34%, rgba(246, 250, 255, 0.78) 48%, rgba(177, 217, 255, 0.58) 56%, rgba(118, 176, 246, 0.22) 66%, rgba(255, 255, 255, 0) 100%);
  --button-template-highlight-opacity: 0.98;
  
  --card-shadow: 0 4px 12px rgb(0 0 0 / 0.4), 0 2px 4px rgb(0 0 0 / 0.3);
  --card-border: var(--neutral-700);
  --card-hover-shadow: 0 8px 24px rgb(0 0 0 / 0.5), 0 4px 8px rgb(0 0 0 / 0.4);
  --card-glow: 0 0 0 1px rgba(251, 191, 36, 0.1);
  
  /* Scrollbar */
  --scrollbar-track: var(--neutral-800);
  --scrollbar-thumb: var(--neutral-600);
  --scrollbar-thumb-hover: var(--neutral-500);
  
  /* Shadows adjusted for dark */
  --shadow-xs: 0 1px 2px rgb(0 0 0 / 0.3);
  --shadow-sm: 0 1px 3px rgb(0 0 0 / 0.4), 0 1px 2px rgb(0 0 0 / 0.3);
  --shadow-md: 0 4px 8px rgb(0 0 0 / 0.5), 0 2px 4px rgb(0 0 0 / 0.4);
  --shadow-lg: 0 12px 24px rgb(0 0 0 / 0.5), 0 4px 8px rgb(0 0 0 / 0.4);
  --shadow-xl: 0 24px 48px rgb(0 0 0 / 0.6), 0 8px 16px rgb(0 0 0 / 0.5);
  
  /* Calendar tokens - Dark theme overrides */
  --cal-done-bg: rgba(34, 197, 94, 0.18);
  --cal-done-br: rgba(34, 197, 94, 0.45);
  --cal-skip-bg: rgba(239, 68, 68, 0.18);
  --cal-skip-br: rgba(239, 68, 68, 0.45);
  --cal-plan-bg: rgba(251, 191, 36, 0.18);
  --cal-plan-br: rgba(251, 191, 36, 0.45);
  --cal-off-bg: rgba(255, 255, 255, 0.03);
  --cal-off-br: rgba(255, 255, 255, 0.08);
  
  --cal-done-bg-dim: rgba(34, 197, 94, 0.08);
  --cal-done-br-dim: rgba(34, 197, 94, 0.18);
  --cal-skip-bg-dim: rgba(239, 68, 68, 0.08);
  --cal-skip-br-dim: rgba(239, 68, 68, 0.18);
  --cal-plan-bg-dim: rgba(251, 191, 36, 0.08);
  --cal-plan-br-dim: rgba(251, 191, 36, 0.18);
  --cal-off-bg-dim: rgba(255, 255, 255, 0.02);
  --cal-off-br-dim: rgba(255, 255, 255, 0.05);
  
  --cal-today-glow: rgba(251, 191, 36, 0);
  --cal-today-header-bg: rgba(251, 191, 36, 0.12);
  --cal-today-text: var(--accent-400);
  --cal-today-column-bg: rgba(251, 191, 36, 0.06);
  --cal-today-column-line: rgba(251, 191, 36, 0.54);
  --cal-today-border: rgba(251, 191, 36, 0.44);
  
  /* Calendar - Past states (solid backgrounds, pastel) - Dark */
  --cal-past-done-bg: rgba(74, 222, 128, 0.28);
  --cal-past-done-br: rgba(74, 222, 128, 0.5);
  --cal-past-skip-bg: rgba(248, 113, 113, 0.28);
  --cal-past-skip-br: rgba(248, 113, 113, 0.5);
  
  /* Calendar - Future states (outline only, more visible) - Dark */
  --cal-future-plan-bg: transparent;
  --cal-future-plan-br: rgba(251, 191, 36, 0.4);
  --cal-future-off-bg: transparent;
  --cal-future-off-br: rgba(255, 255, 255, 0.1);
  
  --cal-month-border: rgba(148, 163, 184, 0.68);
  --cal-month-separator-width: 2px;
  --cal-month-separator-opacity: 0.98;
  --cal-week-separator: rgba(148, 163, 184, 0.24);
  --cal-week-separator-width: 1px;
  
  /* === RITUAL/PARCHMENT TOKENS - Dark === */
  --parchment-bg: linear-gradient(145deg, var(--neutral-800) 0%, var(--neutral-850) 50%, var(--neutral-875) 100%);
  --parchment-border: var(--neutral-600);
  --parchment-shadow: 0 4px 20px rgb(0 0 0 / 0.4), 0 2px 8px rgb(0 0 0 / 0.3);
  --parchment-shadow-hover: 0 16px 40px rgb(0 0 0 / 0.5), 0 6px 16px rgb(0 0 0 / 0.4);
  --seal-glow: 0 0 30px rgba(251, 191, 36, 0.25);
  --ritual-accent: linear-gradient(135deg, #fbbf24 0%, #d97706 50%, #b45309 100%);
}

/* === DARK THEME - Component Styles === */

/* Body/Page: Deep layered background */
[data-theme="dark"] body,
[data-theme="dark"] .app-page {
  background: 
    radial-gradient(ellipse 100% 60% at 50% 0%, rgba(251, 191, 36, 0.03) 0%, transparent 50%),
    var(--bg-base);
}

/* CARDS: Elevated with subtle glow */
[data-theme="dark"] .card,
[data-theme="dark"] .app-card {
  background: var(--surface-primary);
  border: 1px solid var(--card-border);
  box-shadow: var(--card-shadow), var(--card-glow);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

[data-theme="dark"] .card:hover,
[data-theme="dark"] .app-card:hover {
  box-shadow: var(--card-hover-shadow), 0 0 0 1px rgba(251, 191, 36, 0.15);
}

/* HEADER TOP: Elevated dark panel */
[data-theme="dark"] .app-header {
  background: var(--surface-primary);
  border-bottom: 1px solid var(--border-default);
  box-shadow: 0 2px 12px rgb(0 0 0 / 0.3);
}

/* SIDEBAR LEFT: Elevated dark panel */
[data-theme="dark"] .app-sidebar {
  background: var(--surface-primary);
  border-right: 1px solid var(--border-default);
  box-shadow: 2px 0 16px rgb(0 0 0 / 0.3);
}

/* AUTH CARD */
[data-theme="dark"] .auth-card {
  background: var(--surface-primary);
  border: 1px solid var(--border-default);
  box-shadow: var(--shadow-xl), 0 0 0 1px rgba(251, 191, 36, 0.08);
}

/* INPUTS */
[data-theme="dark"] .form-input:focus,
[data-theme="dark"] .form-select:focus,
[data-theme="dark"] .form-textarea:focus {
  border-color: var(--accent-500);
  box-shadow: 0 0 0 3px rgba(251, 191, 36, 0.15);
}

/* BUTTONS */
[data-theme="dark"] .btn-primary:not(.btn-create) {
  box-shadow: 0 2px 8px rgb(245 158 11 / 0.3), 0 0 0 1px rgba(251, 191, 36, 0.2) inset;
}

[data-theme="dark"] .btn-primary:not(.btn-create):hover:not(:disabled) {
  box-shadow: 0 4px 16px rgb(245 158 11 / 0.4), 0 0 24px rgb(251 191 36 / 0.2);
  transform: translateY(-1px);
}

/* NAV LINKS */
[data-theme="dark"] .nav-link.active,
[data-theme="dark"] .sidebar-nav-link.active {
  background: var(--accent-bg);
  border-left: 3px solid var(--accent-500);
  box-shadow: inset 0 0 12px rgba(251, 191, 36, 0.1);
}

/* DROPDOWNS & MENUS */
[data-theme="dark"] .dropdown-menu,
[data-theme="dark"] .popover {
  background: var(--surface-primary);
  border: 1px solid var(--border-default);
  box-shadow: var(--shadow-lg), 0 0 0 1px rgba(251, 191, 36, 0.05);
}

/* MODAL */
[data-theme="dark"] .modal-content {
  background: var(--surface-primary);
  border: 1px solid var(--border-default);
  box-shadow: var(--shadow-xl), 0 0 0 1px rgba(251, 191, 36, 0.08);
}

/* ============================================
   IMMERSIVE UI SKIN CONTRACT
   data-theme remains light/dark; non-default data-ui-skin owns the graphical layer.
   ============================================ */

html[data-ui-skin]:not([data-ui-skin="default"]),
html[data-ui-skin]:not([data-ui-skin="default"]) body {
  --bg-base: var(--kv-app-bg);
  --bg-elevated: var(--kv-surface-raised);
  --bg-sunken: var(--kv-surface-soft);
  --bg-overlay: color-mix(in srgb, var(--kv-app-bg) 78%, rgba(0, 0, 0, 0.72));
  --surface-primary: var(--kv-surface);
  --surface-secondary: var(--kv-surface-soft);
  --surface-tertiary: var(--kv-surface-hover);
  --surface-elevated: var(--kv-surface-raised);
  --surface-interactive: var(--kv-btn-secondary-bg);
  --surface-interactive-hover: var(--kv-btn-secondary-bg-hover);
  --text-primary: var(--kv-text);
  --text-secondary: var(--kv-text-muted);
  --text-tertiary: var(--kv-text-soft);
  --text-muted: var(--kv-text-soft);
  --text-inverse: var(--kv-text-inverse);
  --text-accent: var(--kv-accent-text);
  --border-default: var(--kv-border);
  --border-subtle: var(--kv-border-soft);
  --border-strong: var(--kv-border-strong);
  --border-interactive: var(--kv-border-strong);
  --border-accent: var(--kv-accent);
  --interactive-hover: var(--kv-surface-hover);
  --interactive-active: var(--kv-surface-active);
  --interactive-focus: var(--kv-focus-ring);
  --accent-300: var(--kv-accent-hover);
  --accent-400: var(--kv-accent-hover);
  --accent-500: var(--kv-accent);
  --accent-600: var(--kv-accent-active);
  --accent-700: var(--kv-accent-active);
  --accent-bg: var(--kv-accent-soft);
  --accent-bg-hover: color-mix(in srgb, var(--kv-accent-soft) 76%, var(--kv-surface-hover));
  --accent-text: var(--kv-accent-text);
  --accent-border: var(--kv-border-strong);
  --input-bg: var(--kv-input-bg);
  --input-border: var(--kv-input-border);
  --input-focus-ring: var(--kv-input-focus-border);
  --input-placeholder: var(--kv-input-placeholder);
  --button-primary-bg: var(--kv-btn-primary-bg);
  --button-primary-hover: var(--kv-btn-primary-bg-hover);
  --button-primary-text: var(--kv-btn-primary-text);
  --button-secondary-bg: var(--kv-btn-secondary-bg);
  --button-secondary-hover: var(--kv-btn-secondary-bg-hover);
  --button-secondary-text: var(--kv-btn-secondary-text);
  --button-danger-bg: var(--kv-btn-danger-bg);
  --button-danger-hover: var(--kv-btn-danger-bg-hover);
  --button-danger-text: var(--kv-btn-danger-text);
  --success: var(--kv-success);
  --success-dark: color-mix(in srgb, var(--kv-success) 82%, #000000);
  --success-light: var(--kv-success-soft);
  --warning: var(--kv-warning);
  --warning-dark: color-mix(in srgb, var(--kv-warning) 82%, #000000);
  --warning-light: var(--kv-warning-soft);
  --danger: var(--kv-danger);
  --danger-dark: color-mix(in srgb, var(--kv-danger) 82%, #000000);
  --danger-light: var(--kv-danger-soft);
  --info: var(--kv-info);
  --info-dark: color-mix(in srgb, var(--kv-info) 82%, #000000);
  --info-light: var(--kv-info-soft);
  --card-border: var(--kv-card-border);
  --card-shadow: var(--kv-shadow-soft);
  --card-hover-shadow: var(--kv-shadow-raised);
  --shadow-sm: var(--kv-shadow-soft);
  --shadow-md: var(--kv-shadow-raised);
  --shadow-lg: var(--kv-shadow-raised);
  --shadow-xl: var(--kv-shadow-raised);
  --glow-accent: 0 0 24px color-mix(in srgb, var(--kv-accent) 28%, transparent);
  --glow-accent-strong: 0 0 34px color-mix(in srgb, var(--kv-accent) 42%, transparent);
  --scrollbar-track: color-mix(in srgb, var(--kv-app-bg) 82%, #000000);
  --scrollbar-thumb: color-mix(in srgb, var(--kv-border-strong) 70%, var(--kv-surface-hover));
  --scrollbar-thumb-hover: var(--kv-accent);
  --cal-cell: var(--kv-calendar-cell-bg);
  --cal-cell-hover: var(--kv-calendar-cell-bg-hover);
  --cal-border: var(--kv-calendar-cell-border);
  --cal-done-bg: var(--kv-calendar-cell-completed-bg, var(--kv-success-soft));
  --cal-done-br: var(--kv-calendar-cell-completed-border, color-mix(in srgb, var(--kv-success) 52%, transparent));
  --cal-skip-bg: var(--kv-calendar-cell-missed-bg, var(--kv-danger-soft));
  --cal-skip-br: var(--kv-calendar-cell-missed-border, color-mix(in srgb, var(--kv-danger) 52%, transparent));
  --cal-plan-bg: var(--kv-calendar-cell-planned-bg, var(--kv-warning-soft));
  --cal-plan-br: var(--kv-calendar-cell-planned-border, color-mix(in srgb, var(--kv-warning) 52%, transparent));
  --cal-off-bg: var(--kv-calendar-cell-disabled-bg, color-mix(in srgb, var(--kv-calendar-cell-bg) 72%, transparent));
  --cal-off-br: var(--kv-calendar-cell-border);
  --cal-done-bg-dim: color-mix(in srgb, var(--kv-calendar-cell-completed-bg, var(--kv-success-soft)) 58%, var(--kv-calendar-cell-future-bg, var(--kv-calendar-cell-bg)));
  --cal-done-br-dim: color-mix(in srgb, var(--kv-calendar-cell-completed-border, var(--kv-success)) 56%, var(--kv-calendar-cell-future-border, var(--kv-calendar-cell-border)));
  --cal-skip-bg-dim: color-mix(in srgb, var(--kv-calendar-cell-missed-bg, var(--kv-danger-soft)) 58%, var(--kv-calendar-cell-future-bg, var(--kv-calendar-cell-bg)));
  --cal-skip-br-dim: color-mix(in srgb, var(--kv-calendar-cell-missed-border, var(--kv-danger)) 56%, var(--kv-calendar-cell-future-border, var(--kv-calendar-cell-border)));
  --cal-plan-bg-dim: color-mix(in srgb, var(--kv-calendar-cell-planned-bg, var(--kv-warning-soft)) 52%, var(--kv-calendar-cell-future-bg, var(--kv-calendar-cell-bg)));
  --cal-plan-br-dim: color-mix(in srgb, var(--kv-calendar-cell-planned-border, var(--kv-warning)) 52%, var(--kv-calendar-cell-future-border, var(--kv-calendar-cell-border)));
  --cal-off-bg-dim: var(--kv-calendar-cell-future-bg, var(--kv-calendar-cell-disabled-bg));
  --cal-off-br-dim: var(--kv-calendar-cell-future-border, var(--kv-calendar-cell-border));
  --cal-past-done-bg: var(--kv-calendar-cell-completed-bg, var(--cal-done-bg));
  --cal-past-done-br: var(--kv-calendar-cell-completed-border, var(--cal-done-br));
  --cal-past-skip-bg: var(--kv-calendar-cell-missed-bg, var(--cal-skip-bg));
  --cal-past-skip-br: var(--kv-calendar-cell-missed-border, var(--cal-skip-br));
  --cal-future-plan-bg: color-mix(in srgb, var(--kv-calendar-cell-planned-bg, var(--cal-plan-bg)) 62%, var(--kv-calendar-cell-future-bg, var(--kv-calendar-cell-bg)));
  --cal-future-plan-br: var(--kv-calendar-cell-planned-border, var(--cal-plan-br));
  --cal-future-off-bg: var(--kv-calendar-cell-future-bg, var(--kv-calendar-cell-disabled-bg));
  --cal-future-off-br: var(--kv-calendar-cell-future-border, var(--kv-calendar-cell-border));
  --cal-today-header-bg: color-mix(in srgb, var(--kv-accent) 18%, transparent);
  --cal-today-text: var(--kv-accent-text);
  --cal-today-column-bg: color-mix(in srgb, var(--kv-accent) 9%, transparent);
  --cal-today-column-line: color-mix(in srgb, var(--kv-accent) 68%, transparent);
  --cal-today-border: var(--kv-calendar-today-border, color-mix(in srgb, var(--kv-accent) 52%, transparent));
  --calendar-streak-accent: var(--kv-danger);
  --checkbox-bg: var(--kv-checkbox-bg);
  --checkbox-border: var(--kv-checkbox-border);
  --checkbox-checked-bg: var(--kv-accent);
  --toggle-bg: var(--kv-toggle-bg);
  --toggle-bg-active: var(--kv-toggle-bg-active);
}

html[data-ui-skin]:not([data-ui-skin="default"]) body,
html[data-ui-skin]:not([data-ui-skin="default"]) .app-page {
  background: var(--kv-app-bg-gradient);
  color: var(--kv-text);
}

html[data-ui-skin]:not([data-ui-skin="default"]) .app-header {
  border-bottom-color: var(--kv-border-soft);
  background: var(--kv-topbar-bg);
  box-shadow: var(--kv-shadow-soft);
}

html[data-ui-skin]:not([data-ui-skin="default"]) .app-sidebar {
  border-right-color: var(--kv-border-soft);
  background: var(--kv-sidebar-bg);
  box-shadow: var(--kv-shadow-soft);
}

html[data-ui-skin]:not([data-ui-skin="default"]) .card,
html[data-ui-skin]:not([data-ui-skin="default"]) .app-card,
html[data-ui-skin]:not([data-ui-skin="default"]) .auth-card {
  border-color: var(--kv-card-border);
  background: var(--kv-card-bg);
  color: var(--kv-text);
  box-shadow: var(--kv-shadow-soft);
}

html[data-ui-skin]:not([data-ui-skin="default"]) .card:hover,
html[data-ui-skin]:not([data-ui-skin="default"]) .app-card:hover {
  border-color: var(--kv-border-strong);
  background: var(--kv-card-bg-hover);
  box-shadow: var(--kv-shadow-raised);
}

html[data-ui-skin]:not([data-ui-skin="default"]) .app-card-header,
html[data-ui-skin]:not([data-ui-skin="default"]) .card-header,
html[data-ui-skin]:not([data-ui-skin="default"]) .app-card-footer,
html[data-ui-skin]:not([data-ui-skin="default"]) .card-footer {
  border-color: var(--kv-border-soft);
  background: color-mix(in srgb, var(--kv-surface-soft) 80%, transparent);
}

html[data-ui-skin]:not([data-ui-skin="default"]) .btn-primary:not(.btn-create) {
  border-color: color-mix(in srgb, var(--kv-accent) 46%, var(--kv-border));
  background: var(--kv-btn-primary-bg);
  color: var(--kv-btn-primary-text);
  box-shadow: 0 18px 32px -24px color-mix(in srgb, var(--kv-accent) 60%, transparent);
}

html[data-ui-skin]:not([data-ui-skin="default"]) .btn-primary:not(.btn-create):hover:not(:disabled) {
  border-color: color-mix(in srgb, var(--kv-accent-hover) 58%, var(--kv-border-strong));
  background: var(--kv-btn-primary-bg-hover);
  color: var(--kv-btn-primary-text);
  box-shadow: 0 22px 38px -24px color-mix(in srgb, var(--kv-accent-hover) 66%, transparent);
}

html[data-ui-skin]:not([data-ui-skin="default"]) .btn-secondary,
html[data-ui-skin]:not([data-ui-skin="default"]) .btn-tertiary {
  border-color: var(--kv-border);
  background: var(--kv-btn-secondary-bg);
  color: var(--kv-btn-secondary-text);
}

html[data-ui-skin]:not([data-ui-skin="default"]) .btn-secondary:hover:not(:disabled),
html[data-ui-skin]:not([data-ui-skin="default"]) .btn-tertiary:hover:not(:disabled),
html[data-ui-skin]:not([data-ui-skin="default"]) .btn-ghost:hover:not(:disabled) {
  border-color: var(--kv-border-strong);
  background: var(--kv-btn-secondary-bg-hover);
  color: var(--kv-text);
}

html[data-ui-skin]:not([data-ui-skin="default"]) .btn-danger,
html[data-ui-skin]:not([data-ui-skin="default"]) .btn-delete,
html[data-ui-skin]:not([data-ui-skin="default"]) .action-btn.danger {
  border-color: color-mix(in srgb, var(--kv-danger) 54%, var(--kv-border));
  background: var(--kv-btn-danger-bg);
  color: var(--kv-btn-danger-text);
}

html[data-ui-skin]:not([data-ui-skin="default"]) .btn-danger:hover:not(:disabled),
html[data-ui-skin]:not([data-ui-skin="default"]) .btn-delete:hover:not(:disabled),
html[data-ui-skin]:not([data-ui-skin="default"]) .action-btn.danger:hover:not(:disabled) {
  background: var(--kv-btn-danger-bg-hover);
  color: var(--kv-btn-danger-text);
}

html[data-ui-skin]:not([data-ui-skin="default"]) .nav-link:hover,
html[data-ui-skin]:not([data-ui-skin="default"]) .sidebar-nav-link:hover,
html[data-ui-skin]:not([data-ui-skin="default"]) .header-nav-link:hover {
  background: var(--kv-surface-hover);
  color: var(--kv-text);
}

html[data-ui-skin]:not([data-ui-skin="default"]) .nav-link.active,
html[data-ui-skin]:not([data-ui-skin="default"]) .sidebar-nav-link.active,
html[data-ui-skin]:not([data-ui-skin="default"]) .header-nav-link.active {
  border-color: var(--kv-border-strong);
  background: var(--kv-tab-bg-active);
  color: var(--kv-tab-text-active);
  box-shadow: inset 3px 0 0 var(--kv-accent);
}

html[data-ui-skin]:not([data-ui-skin="default"]) .form-input,
html[data-ui-skin]:not([data-ui-skin="default"]) .form-select,
html[data-ui-skin]:not([data-ui-skin="default"]) .form-textarea,
html[data-ui-skin]:not([data-ui-skin="default"]) input:not([type="checkbox"]):not([type="radio"]):not([type="range"]),
html[data-ui-skin]:not([data-ui-skin="default"]) textarea,
html[data-ui-skin]:not([data-ui-skin="default"]) select {
  border-color: var(--kv-input-border);
  background: var(--kv-input-bg);
  color: var(--kv-text);
}

html[data-ui-skin]:not([data-ui-skin="default"]) .form-input:focus,
html[data-ui-skin]:not([data-ui-skin="default"]) .form-select:focus,
html[data-ui-skin]:not([data-ui-skin="default"]) .form-textarea:focus,
html[data-ui-skin]:not([data-ui-skin="default"]) input:not([type="checkbox"]):not([type="radio"]):not([type="range"]):focus,
html[data-ui-skin]:not([data-ui-skin="default"]) textarea:focus,
html[data-ui-skin]:not([data-ui-skin="default"]) select:focus {
  border-color: var(--kv-input-focus-border);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--kv-input-focus-border) 24%, transparent);
  outline: none;
}

html[data-ui-skin]:not([data-ui-skin="default"]) .dropdown-menu,
html[data-ui-skin]:not([data-ui-skin="default"]) .popover,
html[data-ui-skin]:not([data-ui-skin="default"]) .modal,
html[data-ui-skin]:not([data-ui-skin="default"]) .modal-content {
  border-color: var(--kv-modal-border);
  background: var(--kv-modal-bg);
  color: var(--kv-text);
  box-shadow: var(--kv-shadow-raised);
}

html[data-ui-skin]:not([data-ui-skin="default"]) .modal-header,
html[data-ui-skin]:not([data-ui-skin="default"]) .modal-footer {
  border-color: var(--kv-border-soft);
  background: color-mix(in srgb, var(--kv-surface-soft) 84%, transparent);
}

html[data-ui-skin]:not([data-ui-skin="default"]) .badge,
html[data-ui-skin]:not([data-ui-skin="default"]) .badge-default,
html[data-ui-skin]:not([data-ui-skin="default"]) .badge-accent {
  border: 1px solid color-mix(in srgb, var(--kv-accent) 32%, var(--kv-border));
  background: var(--kv-badge-bg);
  color: var(--kv-badge-text);
}

html[data-ui-skin]:not([data-ui-skin="default"]) .badge-success {
  border-color: color-mix(in srgb, var(--kv-success) 42%, var(--kv-border));
  background: var(--kv-success-soft);
  color: color-mix(in srgb, var(--kv-success) 78%, var(--kv-text));
}

html[data-ui-skin]:not([data-ui-skin="default"]) .badge-danger {
  border-color: color-mix(in srgb, var(--kv-danger) 42%, var(--kv-border));
  background: var(--kv-danger-soft);
  color: color-mix(in srgb, var(--kv-danger) 78%, var(--kv-text));
}

html[data-ui-skin]:not([data-ui-skin="default"]) .badge-warning {
  border-color: color-mix(in srgb, var(--kv-warning) 42%, var(--kv-border));
  background: var(--kv-warning-soft);
  color: color-mix(in srgb, var(--kv-warning) 78%, var(--kv-text));
}

html[data-ui-skin]:not([data-ui-skin="default"]) .progress {
  background: var(--kv-progress-bg);
}

html[data-ui-skin]:not([data-ui-skin="default"]) .progress-bar {
  background: var(--kv-progress-fill);
}

/* ============================================
   4. BASE RESET & DEFAULTS
   ============================================ */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--text-primary);
  background-color: var(--bg-base);
  min-height: 100vh;
  transition: background-color var(--transition-slow), color var(--transition-slow);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--scrollbar-track);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb {
  background: var(--scrollbar-thumb);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--scrollbar-thumb-hover);
}

/* Selection */
::selection {
  background-color: var(--accent-400);
  color: var(--neutral-900);
}

/* Focus Visible */
:focus-visible {
  outline: 2px solid var(--interactive-focus);
  outline-offset: 2px;
}

/* Screen Reader Only */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ============================================
   5. TYPOGRAPHY
   ============================================ */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: var(--font-semibold);
  line-height: var(--leading-tight);
  color: var(--text-primary);
}

.heading-1 { font-size: var(--text-5xl); letter-spacing: var(--tracking-tight); }
.heading-2 { font-size: var(--text-4xl); letter-spacing: var(--tracking-tight); }
.heading-3 { font-size: var(--text-3xl); }
.heading-4 { font-size: var(--text-2xl); }
.heading-5 { font-size: var(--text-xl); }
.heading-6 { font-size: var(--text-lg); }

.text-display {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: var(--font-medium);
  line-height: var(--leading-none);
  letter-spacing: var(--tracking-tight);
}

.text-body {
  font-size: calc(var(--text-base) * 1.08);
  color: var(--text-secondary);
}

.text-body-lg {
  font-size: calc(var(--text-lg) * 1.08);
  color: var(--text-secondary);
}

.text-body-sm {
  font-size: calc(var(--text-sm) * 1.12);
  color: var(--text-secondary);
}

.text-caption {
  font-size: calc(var(--text-xs) * 1.12);
  color: var(--text-tertiary);
  letter-spacing: var(--tracking-wide);
}

.text-overline {
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  text-transform: uppercase;
  letter-spacing: var(--tracking-widest);
  color: var(--text-tertiary);
}

.text-accent { color: var(--text-accent); }
.text-muted { color: var(--text-muted); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-warning { color: var(--warning); }

/* ============================================
   6. LAYOUT SYSTEM
   ============================================ */

/* App Shell - Supports both header and sidebar layouts */
.app-shell {
  display: flex;
  min-height: 100vh;
  flex-direction: column;
}

/* Header Layout (Default) */
.app-shell[data-layout="header"],
.app-shell:not([data-layout]) {
  flex-direction: column;
}

.app-shell[data-layout="header"] .app-sidebar,
.app-shell:not([data-layout]) .app-sidebar {
  display: none;
}

/* Sidebar Layout */
.app-shell[data-layout="sidebar"] {
  flex-direction: row;
  --layout-offset-left: var(--sidebar-width);
}

.app-shell[data-layout="sidebar"] .app-header {
  display: none;
}

.app-shell[data-layout="sidebar"] .app-sidebar {
  display: flex;
  flex-direction: column;
  width: var(--sidebar-width);
  min-height: 100vh;
  position: fixed;
  left: 0;
  top: 0;
  z-index: var(--z-fixed);
  background: var(--surface-primary);
  border-right: 1px solid var(--border-subtle);
}

.app-shell[data-layout="sidebar"] .app-main {
  margin-left: var(--sidebar-width);
  width: calc(100% - var(--sidebar-width));
}

/* App Header */
.app-header {
  height: var(--header-height);
  background: var(--surface-primary);
  border-bottom: 1px solid var(--border-subtle);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  backdrop-filter: blur(12px);
}

.app-header-inner {
  max-width: var(--container-max);
  height: 100%;
  margin: 0 auto;
  padding: 0 var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

/* App Sidebar */
.app-sidebar {
  padding: var(--space-6);
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding-bottom: var(--space-6);
  margin-bottom: var(--space-6);
  border-bottom: 1px solid var(--border-subtle);
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  flex: 1;
}

.sidebar-footer {
  margin-top: auto;
  padding-top: var(--space-6);
  border-top: 1px solid var(--border-subtle);
}

/* App Main Content */
.app-main {
  flex: 1;
  display: flex;
  flex-direction: column;
}

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: var(--space-6);
}

.container-sm { max-width: 640px; }
.container-md { max-width: 768px; }
.container-lg { max-width: 1024px; }
.container-xl { max-width: var(--content-max); }

/* Page Layout */
.page {
  padding: var(--space-8) var(--space-6);
}

.page-header {
  margin-bottom: var(--space-8);
}

.page-title {
  font-size: var(--text-3xl);
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-2);
}

.page-subtitle {
  font-size: var(--text-lg);
  color: var(--text-secondary);
}

/* ============================================
   7. COMPONENTS - BUTTONS
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2-5) var(--space-4);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  line-height: var(--leading-normal);
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Primary Button - With Accent Glow */
.btn-primary {
  background: var(--button-primary-bg);
  color: var(--button-primary-text);
  border-color: transparent;
  box-shadow: var(--shadow-sm);
}

.btn-primary:not(.btn-create):hover:not(:disabled) {
  background: var(--button-primary-hover);
  box-shadow: var(--glow-accent);
  transform: translateY(-1px);
}

.btn-primary:not(.btn-create):active:not(:disabled) {
  transform: translateY(0);
}

/* Secondary Button */
.btn-secondary {
  background: var(--surface-interactive);
  color: var(--text-primary);
  border-color: var(--border-default);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--surface-interactive-hover);
  border-color: var(--border-strong);
}

/* Ghost Button */
.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border-color: transparent;
}

.btn-ghost:hover:not(:disabled) {
  background: var(--interactive-hover);
  color: var(--text-primary);
}

.btn-tertiary {
  background:
    linear-gradient(180deg,
      color-mix(in srgb, var(--surface-primary) 88%, transparent) 0%,
      color-mix(in srgb, var(--surface-secondary) 78%, transparent) 100%);
  color: color-mix(in srgb, var(--text-secondary) 96%, transparent);
  border-color: color-mix(in srgb, var(--border-default) 22%, transparent);
  box-shadow:
    inset 0 1px 0 rgb(255 255 255 / 0.16),
    0 10px 18px -24px rgba(15, 23, 42, 0.08);
}

.btn-tertiary:hover:not(:disabled) {
  background:
    linear-gradient(180deg,
      color-mix(in srgb, var(--surface-primary) 90%, rgba(255, 255, 255, 0.78)) 0%,
      color-mix(in srgb, var(--surface-secondary) 84%, var(--surface-primary)) 100%);
  color: var(--text-primary);
  border-color: color-mix(in srgb, var(--border-strong) 32%, transparent);
  box-shadow: 0 14px 22px -24px rgba(15, 23, 42, 0.1);
}

[data-theme="light"] .btn-tertiary {
  border-color: color-mix(in srgb, var(--border-default) 16%, transparent);
  background:
    linear-gradient(180deg,
      rgba(255, 255, 255, 0.86) 0%,
      color-mix(in srgb, var(--surface-secondary) 70%, var(--surface-primary)) 100%);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.48),
    0 12px 20px -24px rgba(76, 53, 22, 0.12);
}

[data-theme="light"] .btn-tertiary:hover:not(:disabled) {
  border-color: color-mix(in srgb, var(--accent-500) 14%, var(--border-default));
  background:
    linear-gradient(180deg,
      rgba(255, 255, 255, 0.92) 0%,
      color-mix(in srgb, var(--accent-bg) 14%, var(--surface-secondary)) 100%);
}


/* ── Liquid-flow animation for premium .btn-create CTA ── */
/* Premium sweep animation for .btn-template */
@keyframes btn-template-sweep {
  0%,
  12% {
    transform: translate3d(-185%, 0, 0) rotate(12deg) scale(1.02);
    opacity: 0;
  }
  22% {
    opacity: calc(var(--button-template-highlight-opacity, 0.86) * 0.78);
  }
  58% {
    transform: translate3d(182%, 0, 0) rotate(12deg) scale(1.08);
    opacity: var(--button-template-highlight-opacity, 0.86);
  }
  72% {
    opacity: 0;
  }
  100% {
    transform: translate3d(238%, 0, 0) rotate(12deg) scale(1.04);
    opacity: 0;
  }
}

.btn-template {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  min-height: 40px;
  padding-inline: 1rem 1.2rem;
  border-radius: 999px;
  border: 1px solid var(--button-template-border);
  background:
    var(--button-template-sheen),
    var(--button-template-glow),
    var(--button-template-bg);
  background-size: 100% 100%, 100% 100%, 100% 100%;
  background-repeat: no-repeat;
  background-position: 0 0, 0 0, 0 0;
  color: var(--button-template-text);
  box-shadow:
    var(--button-template-shadow),
    inset 0 1px 0 rgba(255, 255, 255, 0.74),
    inset 0 -1px 0 rgba(119, 162, 219, 0.08);
  text-shadow: 0 1px 0 rgba(255, 255, 255, 0.34);
  transition:
    transform var(--transition-fast),
    box-shadow var(--transition-fast),
    border-color var(--transition-fast),
    filter var(--transition-fast);
}

.btn-template::after {
  content: "";
  position: absolute;
  z-index: -1;
  top: -62%;
  bottom: -62%;
  left: -30%;
  width: 54%;
  border-radius: 999px;
  background: var(--button-template-highlight);
  filter: blur(11px);
  opacity: 0;
  transform: translate3d(-185%, 0, 0) rotate(12deg) scale(1.02);
  transform-origin: center;
  will-change: transform, opacity;
  pointer-events: none;
  animation: btn-template-sweep 5.4s cubic-bezier(0.42, 0, 0.2, 1) infinite;
}

.btn-template:hover:not(:disabled) {
  border-color: color-mix(in srgb, var(--button-template-border) 78%, rgba(124, 175, 240, 0.94));
  box-shadow:
    var(--button-template-shadow-hover),
    inset 0 1px 0 rgba(255, 255, 255, 0.8),
    inset 0 -1px 0 rgba(126, 170, 230, 0.1);
  transform: translateY(-1px);
  filter: saturate(1.02) brightness(1.015);
}

.btn-template:hover:not(:disabled)::after {
  filter: blur(12px);
}

.btn-template:active:not(:disabled) {
  transform: translateY(0.5px) scale(0.986);
  box-shadow:
    0 10px 18px -14px rgba(84, 126, 181, 0.18),
    inset 0 1px 0 rgba(255, 255, 255, 0.62),
    inset 0 2px 4px rgba(95, 135, 191, 0.12);
  filter: brightness(0.99) saturate(1.02);
}

.btn-template:focus-visible {
  outline: none;
  box-shadow:
    0 0 0 3px var(--button-template-ring),
    var(--button-template-shadow-hover),
    inset 0 1px 0 rgba(255, 255, 255, 0.82);
}

.btn-sm.btn-template {
  min-height: 35px;
  padding-inline: 0.88rem 1.04rem;
  font-size: 12.5px;
}

[data-theme="dark"] .btn-template {
  box-shadow:
    var(--button-template-shadow),
    inset 0 1px 0 rgba(240, 247, 255, 0.16),
    inset 0 -1px 0 rgba(138, 180, 240, 0.1);
  text-shadow: 0 1px 0 rgba(7, 14, 26, 0.24);
}

[data-theme="dark"] .btn-template::after {
  filter: blur(13px);
}

[data-theme="dark"] .btn-template:hover:not(:disabled) {
  border-color: color-mix(in srgb, var(--button-template-border) 72%, rgba(174, 208, 255, 0.54));
  filter: saturate(1.03) brightness(1.03);
}

@media (prefers-reduced-motion: reduce) {
  .btn-template::after {
    animation: none;
    opacity: 0.46;
    transform: translate3d(36%, 0, 0) rotate(12deg) scale(1.03);
  }
}

/* Liquid-flow animation for premium .btn-create CTA */
@keyframes btn-create-flow {
  0% {
    transform: translate(-5%, -8%) rotate(0deg) scale(1);
  }
  14% {
    transform: translate(8%, -12%) rotate(50deg) scale(1.03);
  }
  32% {
    transform: translate(10%, 5%) rotate(115deg) scale(0.98);
  }
  48% {
    transform: translate(-4%, 10%) rotate(170deg) scale(1.01);
  }
  65% {
    transform: translate(-12%, 2%) rotate(235deg) scale(1.04);
  }
  82% {
    transform: translate(-7%, -10%) rotate(310deg) scale(0.97);
  }
  100% {
    transform: translate(-5%, -8%) rotate(360deg) scale(1);
  }
}

.btn-create {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  min-height: 40px;
  gap: 0.52rem;
  padding-inline: 1.1rem 1.24rem;
  border-radius: 999px;
  font-weight: 700;
  letter-spacing: 0.012em;
  line-height: 1;
  text-shadow: 0 1px 0 rgba(74, 38, 9, 0.15);
  transition:
    transform var(--transition-fast),
    box-shadow var(--transition-fast),
    border-color var(--transition-fast),
    filter var(--transition-fast);
}

.btn-sm.btn-create {
  min-height: 35px;
  gap: 0.44rem;
  padding-inline: 0.9rem 1.04rem;
  border-radius: 999px;
  font-size: 12.5px;
}

.btn-create::before {
  content: "+";
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: auto;
  height: auto;
  font-size: 1.02em;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.04em;
  flex: 0 0 auto;
  transform: translateY(-0.03em);
  opacity: 0.96;
}

.btn-primary.btn-create {
  color: var(--button-create-text, var(--button-primary-text));
  border-width: 1.5px;
  border-color: color-mix(in srgb, var(--button-create-border, var(--button-primary-bg)) 82%, rgba(255, 243, 208, 0.42));
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.3) 0%, rgba(255, 248, 223, 0.12) 28%, rgba(255, 241, 206, 0) 52%),
    radial-gradient(130% 120% at 16% 14%, rgba(255, 242, 181, 0.26) 0%, rgba(255, 242, 181, 0) 42%),
    var(--button-create-bg, var(--button-primary-bg));
  box-shadow:
    var(--button-create-shadow, 0 18px 30px -22px rgba(155, 96, 27, 0.3)),
    inset 0 1px 0 rgba(255, 252, 236, 0.56),
    inset 0 -1px 0 rgba(215, 124, 0, 0.18);
}

/* Animated liquid blobs — two radial masses on oversized rotating layer */
.btn-primary.btn-create::after {
  content: '';
  position: absolute;
  z-index: -1;
  width: 260%;
  height: 260%;
  top: -80%;
  left: -80%;
  border-radius: 50%;
  background:
    radial-gradient(ellipse 46% 50% at 26% 74%,
      rgba(255, 219, 103, 0.96) 0%,
      rgba(255, 209, 74, 0.8) 34%,
      rgba(255, 209, 74, 0.34) 58%,
      transparent 78%),
    radial-gradient(ellipse 42% 64% at 56% 18%,
      rgba(255, 154, 2, 0.94) 0%,
      rgba(255, 137, 0, 0.8) 36%,
      rgba(255, 137, 0, 0.34) 62%,
      transparent 80%),
    radial-gradient(ellipse 30% 38% at 78% 62%,
      rgba(255, 187, 46, 0.46) 0%,
      transparent 72%);
  filter: blur(18px) saturate(1.12);
  will-change: transform;
  animation: btn-create-flow 6s cubic-bezier(0.37, 0, 0.63, 1) infinite;
  pointer-events: none;
  transition: filter var(--transition-fast);
}

.btn-primary.btn-create::before {
  color: currentColor;
}

.btn-primary.btn-create:hover:not(:disabled) {
  border-color: color-mix(in srgb, var(--button-create-border, var(--button-primary-bg)) 88%, rgba(255, 248, 222, 0.54));
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.34) 0%, rgba(255, 248, 223, 0.14) 30%, rgba(255, 241, 206, 0) 54%),
    radial-gradient(130% 120% at 16% 14%, rgba(255, 242, 181, 0.28) 0%, rgba(255, 242, 181, 0) 42%),
    var(--button-create-hover, var(--button-create-bg));
  box-shadow:
    var(--button-create-shadow-hover, 0 22px 36px -22px rgba(170, 104, 28, 0.34)),
    inset 0 1px 0 rgba(255, 252, 238, 0.6),
    inset 0 -1px 0 rgba(220, 128, 0, 0.18);
  transform: translateY(-1px);
  filter: brightness(1.02) saturate(1.08);
}

.btn-primary.btn-create:hover:not(:disabled)::after {
  filter: blur(16px) brightness(1.08) saturate(1.16);
}

.btn-primary.btn-create:active:not(:disabled) {
  transform: translateY(0.5px) scale(0.985);
  filter: saturate(1.02) brightness(0.98);
  box-shadow:
    0 8px 14px -10px rgba(208, 116, 0, 0.24),
    inset 0 1px 0 rgba(255, 249, 232, 0.22),
    inset 0 2px 4px rgba(176, 97, 0, 0.14);
}

.btn-primary.btn-create:focus-visible {
  outline: none;
  box-shadow:
    0 0 0 3px var(--button-create-ring, rgba(212, 138, 46, 0.24)),
    var(--button-create-shadow, 0 18px 30px -22px rgba(155, 96, 27, 0.28)),
    inset 0 1px 0 rgba(255, 252, 238, 0.52),
    inset 0 -1px 0 rgba(220, 128, 0, 0.16);
}

.btn-primary.btn-create:disabled::after {
  animation-play-state: paused;
  opacity: 0.4;
}

[data-theme="light"] .btn-primary.btn-create {
  text-shadow: 0 1px 0 rgba(153, 83, 0, 0.16);
}

[data-theme="dark"] .btn-primary.btn-create,
body.dark-theme .btn-primary.btn-create {
  text-shadow: 0 1px 0 rgba(115, 61, 0, 0.26);
}

[data-theme="dark"] .btn-primary.btn-create::after,
body.dark-theme .btn-primary.btn-create::after {
  background:
    radial-gradient(ellipse 46% 50% at 26% 74%,
      rgba(255, 214, 92, 0.92) 0%,
      rgba(255, 202, 58, 0.76) 34%,
      rgba(255, 202, 58, 0.3) 58%,
      transparent 78%),
    radial-gradient(ellipse 42% 64% at 56% 18%,
      rgba(255, 148, 0, 0.92) 0%,
      rgba(255, 132, 0, 0.78) 36%,
      rgba(255, 132, 0, 0.3) 62%,
      transparent 80%),
    radial-gradient(ellipse 30% 38% at 78% 62%,
      rgba(255, 182, 42, 0.4) 0%,
      transparent 72%);
}

@media (prefers-reduced-motion: reduce) {
  .btn-primary.btn-create::after {
    animation: none;
    transform: translate(-4%, -4%);
    filter: blur(24px);
    opacity: 0.6;
  }
}


/* ── Create Spark — adopted create-action candidate ────────────── */
/* Replaces btn-create for create-oriented CTAs. Preserves production
   font-family and text color; uses create-spark gradient direction
   with a subtler idle shimmer and refined interaction states. */

@keyframes btn-spark-shimmer {
  0%   { background-position: 200% 50%; }
  100% { background-position: -200% 50%; }
}

.btn-create-spark {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  min-height: 40px;
  gap: 0.52rem;
  padding-inline: 1.1rem 1.24rem;
  border-radius: 999px;
  font-family: inherit;
  font-weight: 700;
  letter-spacing: 0.012em;
  line-height: 1;
  color: var(--button-create-text, var(--button-primary-text));
  border-width: 1.5px;
  border-style: solid;
  border-color: rgba(255, 244, 214, 0.36);
  background:
    linear-gradient(135deg, #ffd670 0%, #f59e0b 60%, #e8890a 100%);
  box-shadow:
    0 18px 30px -22px rgba(245, 158, 11, 0.52),
    inset 0 1px 0 rgba(255, 252, 236, 0.48),
    inset 0 -1px 0 rgba(215, 124, 0, 0.14);
  text-shadow: 0 1px 0 rgba(74, 38, 9, 0.12);
  transition:
    transform var(--transition-fast),
    box-shadow var(--transition-fast),
    border-color var(--transition-fast),
    filter var(--transition-fast);
}

.btn-sm.btn-create-spark {
  min-height: 35px;
  gap: 0.44rem;
  padding-inline: 0.9rem 1.04rem;
  border-radius: 999px;
  font-size: 12.5px;
}

.btn-create-spark::before {
  content: "+";
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: auto;
  height: auto;
  font-size: 1.02em;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.04em;
  flex: 0 0 auto;
  transform: translateY(-0.03em);
  opacity: 0.96;
  color: currentColor;
}

/* Subtle shimmer overlay — gentler than liquid blob */
.btn-create-spark::after {
  content: '';
  position: absolute;
  z-index: -1;
  inset: 0;
  border-radius: inherit;
  background:
    linear-gradient(
      105deg,
      transparent 20%,
      rgba(255, 255, 255, 0.22) 38%,
      rgba(255, 255, 255, 0.32) 50%,
      rgba(255, 255, 255, 0.22) 62%,
      transparent 80%
    );
  background-size: 400% 100%;
  animation: btn-spark-shimmer 4.5s ease-in-out infinite;
  pointer-events: none;
}

.btn-create-spark:hover:not(:disabled) {
  border-color: rgba(255, 248, 222, 0.54);
  box-shadow:
    0 22px 36px -22px rgba(245, 158, 11, 0.58),
    inset 0 1px 0 rgba(255, 252, 238, 0.56),
    inset 0 -1px 0 rgba(220, 128, 0, 0.16);
  transform: translateY(-1px);
  filter: brightness(1.04) saturate(1.06);
}

.btn-create-spark:hover:not(:disabled)::after {
  animation-duration: 2.8s;
}

.btn-create-spark:active:not(:disabled) {
  transform: translateY(0.5px) scale(0.985);
  filter: saturate(1.02) brightness(0.97);
  box-shadow:
    0 8px 14px -10px rgba(208, 116, 0, 0.24),
    inset 0 1px 0 rgba(255, 249, 232, 0.22),
    inset 0 2px 4px rgba(176, 97, 0, 0.14);
}

.btn-create-spark:focus-visible {
  outline: none;
  box-shadow:
    0 0 0 3px var(--button-create-ring, rgba(212, 138, 46, 0.24)),
    0 18px 30px -22px rgba(245, 158, 11, 0.48),
    inset 0 1px 0 rgba(255, 252, 238, 0.52),
    inset 0 -1px 0 rgba(220, 128, 0, 0.16);
}

.btn-create-spark:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-create-spark:disabled::after {
  animation-play-state: paused;
  opacity: 0.3;
}

[data-theme="light"] .btn-create-spark {
  text-shadow: 0 1px 0 rgba(153, 83, 0, 0.14);
}

[data-theme="dark"] .btn-create-spark,
body.dark-theme .btn-create-spark {
  background: linear-gradient(135deg, #f0c44a 0%, #d98b08 60%, #c27a05 100%);
  border-color: rgba(255, 220, 140, 0.28);
  text-shadow: 0 1px 0 rgba(115, 61, 0, 0.22);
}

@media (prefers-reduced-motion: reduce) {
  .btn-create-spark::after {
    animation: none;
    opacity: 0.18;
  }
}

/* Premium Action — special Plus CTA with restrained animated border */
@keyframes ks-premium-border-sweep {
  0% { background-position: 120% 50%; }
  100% { background-position: -120% 50%; }
}

.btn.ks-premium-action,
.ks-premium-action {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  max-width: 100%;
  border: 1px solid color-mix(in srgb, var(--accent-400) 36%, var(--border-default) 64%);
  background:
    linear-gradient(180deg,
      color-mix(in srgb, var(--surface-primary) 94%, var(--accent-500) 6%) 0%,
      color-mix(in srgb, var(--surface-secondary) 90%, var(--accent-700) 10%) 100%);
  color: var(--text-primary);
  box-shadow:
    0 14px 28px -24px color-mix(in srgb, var(--accent-500) 36%, transparent),
    inset 0 1px 0 color-mix(in srgb, var(--neutral-0) 16%, transparent);
  font-weight: 760;
  letter-spacing: 0;
  white-space: nowrap;
  transition:
    transform var(--transition-fast),
    border-color var(--transition-fast),
    background var(--transition-fast),
    box-shadow var(--transition-fast),
    filter var(--transition-fast);
}

.btn-sm.ks-premium-action {
  min-height: 34px;
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 0.82rem;
}

.ks-premium-action::after {
  content: '';
  position: absolute;
  left: 12px;
  right: 12px;
  top: 0;
  height: 1px;
  border-radius: 999px;
  background: linear-gradient(90deg, transparent, rgba(255, 222, 139, 0.86), transparent);
  opacity: 0.62;
  pointer-events: none;
}

@supports ((-webkit-mask-composite: xor) or (mask-composite: exclude)) {
  .ks-premium-action::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    padding: 1.25px;
    background: linear-gradient(110deg,
      transparent 0%,
      transparent 12%,
      rgba(251, 191, 36, 0.28) 20%,
      rgba(255, 225, 153, 0.88) 31%,
      rgba(245, 158, 11, 0.74) 42%,
      rgba(139, 92, 246, 0.16) 52%,
      transparent 66%,
      transparent 100%);
    background-size: 260% 100%;
    background-repeat: repeat;
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
            mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
            mask-composite: exclude;
    pointer-events: none;
    animation: ks-premium-border-sweep 5.8s linear infinite;
  }
}

.ks-premium-action:hover:not(:disabled):not([aria-disabled="true"]) {
  transform: translateY(-1px);
  border-color: color-mix(in srgb, var(--accent-300) 58%, var(--border-default) 42%);
  background:
    linear-gradient(180deg,
      color-mix(in srgb, var(--surface-primary) 88%, var(--accent-400) 12%) 0%,
      color-mix(in srgb, var(--surface-secondary) 86%, var(--accent-600) 14%) 100%);
  box-shadow:
    0 18px 34px -24px color-mix(in srgb, var(--accent-500) 48%, transparent),
    0 0 0 3px color-mix(in srgb, var(--accent-400) 9%, transparent),
    inset 0 1px 0 color-mix(in srgb, var(--neutral-0) 20%, transparent);
  filter: brightness(1.03) saturate(1.03);
}

.ks-premium-action:active:not(:disabled):not([aria-disabled="true"]) {
  transform: translateY(0);
  filter: brightness(0.98);
}

.ks-premium-action:focus-visible {
  outline: 2px solid color-mix(in srgb, var(--accent-400) 74%, transparent);
  outline-offset: 3px;
  box-shadow:
    0 0 0 4px color-mix(in srgb, var(--accent-400) 18%, transparent),
    0 18px 34px -24px color-mix(in srgb, var(--accent-500) 42%, transparent),
    inset 0 1px 0 color-mix(in srgb, var(--neutral-0) 18%, transparent);
}

.ks-premium-action:disabled,
.ks-premium-action[aria-disabled="true"] {
  cursor: not-allowed;
  opacity: 0.58;
  transform: none;
  filter: grayscale(0.08);
}

[data-theme="dark"] .ks-premium-action,
body.dark-theme .ks-premium-action {
  background:
    linear-gradient(180deg,
      color-mix(in srgb, var(--surface-secondary) 88%, rgba(251, 191, 36, 0.08)) 0%,
      color-mix(in srgb, var(--surface-primary) 94%, rgba(146, 64, 14, 0.1)) 100%);
  color: color-mix(in srgb, var(--text-primary) 94%, #fff7d6 6%);
  border-color: color-mix(in srgb, var(--accent-400) 34%, var(--border-default) 66%);
  box-shadow:
    0 16px 30px -24px rgba(245, 158, 11, 0.34),
    inset 0 1px 0 rgba(255, 255, 255, 0.055);
}

@media (prefers-reduced-motion: reduce) {
  .ks-premium-action,
  .ks-premium-action::before {
    animation: none !important;
    transition-duration: 1ms;
  }

  .ks-premium-action::before {
    background-position: 48% 50%;
  }
}

/* Danger Button */
.btn-danger {
  background: var(--danger);
  color: var(--neutral-0);
  border-color: transparent;
}

.btn-danger:hover:not(:disabled) {
  background: var(--danger-dark);
}

/* Link Button */
.btn-link {
  background: transparent;
  color: var(--text-accent);
  border-color: transparent;
  padding: 0;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.btn-link:hover:not(:disabled) {
  color: var(--accent-500);
}

/* Button Sizes */
.btn-sm {
  padding: var(--space-1-5) var(--space-3);
  font-size: var(--text-xs);
  border-radius: var(--radius-md);
}

.btn-lg {
  padding: var(--space-3-5) var(--space-6);
  font-size: var(--text-base);
  border-radius: var(--radius-xl);
}

.btn-icon {
  padding: var(--space-2);
  aspect-ratio: 1;
}

.btn-full {
  width: 100%;
}

/* ============================================
   7b. COMPONENTS - LOADING PRIMITIVES
   ============================================ */

@keyframes ks-loader-bar-slide {
  0% { transform: translateX(-125%); }
  100% { transform: translateX(285%); }
}

@keyframes ks-shimmer-sweep {
  0% { background-position: 180% 50%; }
  100% { background-position: -180% 50%; }
}

@keyframes ks-spinner-soft-spin {
  to { transform: rotate(360deg); }
}

.ks-loader-block {
  display: grid;
  justify-items: center;
  align-content: center;
  gap: var(--space-3);
  min-width: 0;
  color: var(--text-secondary);
  text-align: center;
}

.ks-loader-block--page {
  min-height: 220px;
  padding: var(--space-8) var(--space-4);
}

.ks-page-loader {
  min-height: clamp(260px, 52vh, 480px);
  padding: var(--space-10) var(--space-4);
}

.ks-page-loader[hidden],
[data-page-content][hidden] {
  display: none !important;
}

.ks-loader-block--inline {
  min-height: 58px;
  padding: var(--space-3) var(--space-2);
  gap: var(--space-2);
}

.ks-loader-label {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.ks-loader-bar {
  position: relative;
  display: block;
  width: min(240px, 100%);
  height: 5px;
  overflow: hidden;
  border: 1px solid color-mix(in srgb, var(--accent-400) 18%, var(--border-default) 82%);
  border-radius: 999px;
  background: color-mix(in srgb, var(--surface-tertiary) 66%, transparent);
  box-shadow:
    inset 0 1px 1px color-mix(in srgb, var(--neutral-950) 14%, transparent),
    0 10px 22px -20px color-mix(in srgb, var(--accent-500) 42%, transparent);
}

.ks-loader-bar::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 42%;
  border-radius: inherit;
  background: linear-gradient(90deg,
    transparent 0%,
    color-mix(in srgb, var(--accent-500) 42%, transparent) 14%,
    color-mix(in srgb, var(--accent-300) 86%, #fff7d6 14%) 50%,
    color-mix(in srgb, var(--accent-600) 54%, transparent) 86%,
    transparent 100%);
  box-shadow: 0 0 16px color-mix(in srgb, var(--accent-400) 32%, transparent);
  transform: translateX(-125%);
  animation: ks-loader-bar-slide 1.65s ease-in-out infinite;
}

.ks-loader-bar--page {
  width: min(300px, calc(100vw - 64px));
  height: 6px;
}

.ks-loader-bar--inline {
  width: min(180px, 100%);
  height: 4px;
}

.ks-shimmer-lines {
  display: grid;
  gap: var(--space-2);
  width: min(260px, 100%);
}

.ks-shimmer-line {
  display: block;
  height: 10px;
  border-radius: 999px;
  background:
    linear-gradient(90deg,
      color-mix(in srgb, var(--surface-tertiary) 80%, transparent) 0%,
      color-mix(in srgb, var(--accent-500) 18%, var(--surface-secondary)) 48%,
      color-mix(in srgb, var(--surface-tertiary) 80%, transparent) 100%);
  background-size: 220% 100%;
  animation: ks-shimmer-sweep 1.55s ease-in-out infinite;
}

.ks-shimmer-line:nth-child(1) { width: 94%; }
.ks-shimmer-line:nth-child(2) { width: 76%; }
.ks-shimmer-line:nth-child(3) { width: 58%; }

.ks-spinner-soft {
  display: inline-block;
  width: 1.15em;
  height: 1.15em;
  flex: 0 0 auto;
  border: 2px solid color-mix(in srgb, var(--accent-400) 18%, var(--border-default) 82%);
  border-top-color: color-mix(in srgb, var(--accent-400) 92%, var(--text-primary) 8%);
  border-radius: 50%;
  animation: ks-spinner-soft-spin 820ms linear infinite;
}

@media (prefers-reduced-motion: reduce) {
  .ks-loader-bar::before,
  .ks-shimmer-line,
  .ks-spinner-soft {
    animation: none !important;
  }

  .ks-loader-bar::before {
    transform: translateX(72%);
  }
}

/* ============================================
   8. COMPONENTS - CARDS
   ============================================ */

.card {
  background: var(--surface-primary);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--card-shadow);
  overflow: hidden;
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.card-hover:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.card-header {
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--border-subtle);
}

.card-title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
}

.card-subtitle {
  font-size: var(--text-sm);
  color: var(--text-tertiary);
  margin-top: var(--space-1);
}

.card-body {
  padding: var(--space-6);
}

.card-footer {
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--border-subtle);
  background: var(--surface-secondary);
}

/* Card Variants */
.card-flat {
  box-shadow: none;
  border: 1px solid var(--border-default);
}

.card-elevated {
  box-shadow: var(--shadow-xl);
}

.card-accent {
  border-color: var(--border-accent);
  background: linear-gradient(135deg, var(--surface-primary), var(--accent-bg));
}

/* ============================================
   9. COMPONENTS - FORMS
   ============================================ */

.form-group {
  margin-bottom: var(--space-5);
}

.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.form-label-optional {
  font-weight: var(--font-normal);
  color: var(--text-muted);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: var(--space-2-5) var(--space-3);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  color: var(--text-primary);
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:hover,
.form-select:hover,
.form-textarea:hover {
  border-color: var(--border-strong);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--input-focus-ring);
  box-shadow: 0 0 0 3px rgb(251 191 36 / 0.15);
}

.form-input::placeholder {
  color: var(--text-muted);
}

.form-textarea {
  min-height: 100px;
  resize: vertical;
}

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' viewBox='0 0 20 20' fill='%2371717a'%3E%3Cpath fill-rule='evenodd' d='M5.293 7.293a1 1 0 011.414 0L10 10.586l3.293-3.293a1 1 0 111.414 1.414l-4 4a1 1 0 01-1.414 0l-4-4a1 1 0 010-1.414z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-3) center;
  padding-right: var(--space-10);
}

.form-hint {
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  margin-top: var(--space-1-5);
}

.form-error {
  font-size: var(--text-xs);
  color: var(--danger);
  margin-top: var(--space-1-5);
}

/* Checkbox & Radio */
.form-check {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.form-check-input {
  width: 18px;
  height: 18px;
  accent-color: var(--accent-500);
  cursor: pointer;
}

.form-check-label {
  font-size: var(--text-sm);
  color: var(--text-primary);
  cursor: pointer;
}

/* ============================================
   10. COMPONENTS - NAVIGATION
   ============================================ */

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2-5) var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
}

.nav-link:hover {
  background: var(--interactive-hover);
  color: var(--text-primary);
}

.nav-link.active {
  background: var(--accent-bg);
  color: var(--text-accent);
}

.nav-link-icon {
  width: 20px;
  height: 20px;
  opacity: 0.7;
}

.nav-link:hover .nav-link-icon,
.nav-link.active .nav-link-icon {
  opacity: 1;
}

/* ============================================
   11. COMPONENTS - BADGES & TAGS
   ============================================ */

.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-0-5) var(--space-2);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.badge-default {
  background: var(--surface-tertiary);
  color: var(--text-secondary);
}

.badge-accent {
  background: var(--accent-bg);
  color: var(--text-accent);
}

.badge-success {
  background: var(--success-light);
  color: var(--success-dark);
}

.badge-danger {
  background: var(--danger-light);
  color: var(--danger-dark);
}

.badge-warning {
  background: var(--warning-light);
  color: var(--warning-dark);
}

/* ============================================
   12. COMPONENTS - ALERTS
   ============================================ */

.alert {
  display: flex;
  gap: var(--space-3);
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  font-size: var(--text-sm);
}

.alert-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
}

.alert-content {
  flex: 1;
}

.alert-title {
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-1);
}

.alert-info {
  background: var(--info-light);
  color: var(--info-dark);
  border: 1px solid var(--info);
}

.alert-success {
  background: var(--success-light);
  color: var(--success-dark);
  border: 1px solid var(--success);
}

.alert-warning {
  background: var(--warning-light);
  color: var(--warning-dark);
  border: 1px solid var(--warning);
}

.alert-error {
  background: var(--danger-light);
  color: var(--danger-dark);
  border: 1px solid var(--danger);
}

/* Dark theme alerts */
[data-theme="dark"] .alert-info,
body.dark-theme .alert-info {
  background: rgb(59 130 246 / 0.1);
  border-color: rgb(59 130 246 / 0.3);
}

[data-theme="dark"] .alert-success,
body.dark-theme .alert-success {
  background: rgb(34 197 94 / 0.1);
  border-color: rgb(34 197 94 / 0.3);
}

[data-theme="dark"] .alert-warning,
body.dark-theme .alert-warning {
  background: rgb(245 158 11 / 0.1);
  border-color: rgb(245 158 11 / 0.3);
}

[data-theme="dark"] .alert-error,
body.dark-theme .alert-error {
  background: rgb(239 68 68 / 0.1);
  border-color: rgb(239 68 68 / 0.3);
}

/* ============================================
   13. COMPONENTS - TABLES
   ============================================ */

.table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-default);
}

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}

.table th,
.table td {
  padding: var(--space-3) var(--space-4);
  text-align: left;
  border-bottom: 1px solid var(--border-subtle);
}

.table th {
  font-weight: var(--font-semibold);
  color: var(--text-tertiary);
  background: var(--surface-secondary);
  text-transform: uppercase;
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wide);
}

.table tbody tr:hover {
  background: var(--interactive-hover);
}

.table tbody tr:last-child td {
  border-bottom: none;
}

/* ============================================
   14. COMPONENTS - MODAL
   ============================================ */

/* ============================================
   CALENDAR HABIT CELL GRID LAYOUT
   ============================================ */

.habit-cell-grid {
  display: grid;
  grid-template-columns: 1.1em 1fr auto;
  grid-template-rows: auto auto;
  column-gap: 16px;
  row-gap: 6px;
  align-items: center;
  width: 100%;
}

.habit-icon-wrap {
  grid-column: 1;
  grid-row: 1;
  background: transparent !important;
  padding: 0 !important;
  border-radius: 0 !important;
  box-shadow: none !important;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

.habit-icon-wrap img,
.habit-icon-wrap svg,
.habit-icon-wrap .habit-icon {
  width: 1.1em !important;
  height: 1.1em !important;
  display: block;
}

.habit-title {
  grid-column: 2;
  grid-row: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 1rem;
  font-weight: 600;
}

.habit-progress-wrap {
  grid-column: 3;
  grid-row: 1;
  justify-self: end;
  align-self: start;
}

.habit-meta-row {
  grid-column: 1 / 3;
  grid-row: 2;
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.habit-frequency {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.68);
  font-weight: 500;
  margin: 0 !important;
  padding: 0 !important;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.habit-streak {
  background: transparent !important;
  padding: 0 !important;
  border-radius: 0 !important;
  box-shadow: none !important;
  font-size: 0.9rem;
  color: rgba(255,255,255,0.78);
  flex-shrink: 0;
}

/* Icon-only mode: hide meta row */
.icon-only-mode .habit-meta-row {
  display: none;
}

/* rimuove qualunque badge/cerchio dietro l'icona SOLO nella cella abitudine */
.habit-cell-grid .habit-icon-wrap,
.habit-cell-grid .habit-icon-wrap *{
  background: transparent !important;
  border: 0 !important;
  box-shadow: none !important;
  outline: 0 !important;
}

/* se qualche elemento applica forma circolare via radius/padding */
.habit-cell-grid .habit-icon-wrap,
.habit-cell-grid .habit-icon-wrap *{
  border-radius: 0 !important;
  padding: 0 !important;
}

/* evita che eventuali pseudo-elementi disegnino il cerchio */
.habit-cell-grid .habit-icon-wrap::before,
.habit-cell-grid .habit-icon-wrap::after,
.habit-cell-grid .habit-icon-wrap *::before,
.habit-cell-grid .habit-icon-wrap *::after{
  content: none !important;
  background: transparent !important;
  box-shadow: none !important;
}

/* Se l'icona è dentro una classe specifica che forza il cerchio */
.habit-cell-grid .habit-icon,
.habit-cell-grid .icon,
.habit-cell-grid .icon-badge{
  background: transparent !important;
  border-radius: 0 !important;
  padding: 0 !important;
  box-shadow: none !important;
}

/* Light theme overrides for frequency and streak colors */
[data-theme="light"] .habit-frequency {
  color: rgba(0,0,0,0.6);
}

[data-theme="light"] .habit-streak {
  color: rgba(0,0,0,0.7);
}

/* ============================================
   ICON-ONLY MODE COLUMN SIZING
   ============================================ */

/* quando icon-only è attivo, la colonna abitudine deve essere stretta */
.calendar-board.icon-only-mode #habit-calendar th.habit-header-cell,
.calendar-board.icon-only-mode #habit-calendar td.habit-name-cell.habit-column-cell {
  width: 64px !important;
  min-width: 64px !important;
  max-width: 64px !important;
}

/* sincronizza anche il colgroup per header/body */
.calendar-board.icon-only-mode #habit-calendar colgroup col.habit-column {
  width: 64px !important;
  min-width: 64px !important;
  max-width: 64px !important;
}

/* Icon-only: riduci padding della colonna sticky */
.calendar-board.icon-only-mode #habit-calendar td.habit-name-cell.habit-column-cell {
  padding-left: 8px !important;
  padding-right: 8px !important;
}

/* in icon-only nascondi titolo/meta/pill e centra l'icona */
.calendar-board.icon-only-mode .habit-title,
.calendar-board.icon-only-mode .habit-meta-row,
.calendar-board.icon-only-mode .habit-progress-wrap {
  display: none !important;
}

.calendar-board.icon-only-mode .habit-cell-grid {
  grid-template-columns: 1fr !important;
  justify-items: center;
}

/* ============================================
   CALENDAR STRUCTURE - OVERFLOW CORRECTIONS
   ============================================ */

/* Container esterno con card e rounding */
.calendar-board {
  border-radius: 16px;
  overflow: hidden; /* clip rounding */
  position: relative;
  isolation: isolate;
}

/* Wrapper che scorre - SOLO orizzontale */
.calendar-wrapper {
  overflow-x: auto;
  overflow-y: hidden; /* VIETATO scroll verticale interno */
  scrollbar-gutter: stable;
  max-height: none; /* Rimuovi eventuali limiti di altezza */
}

/* Tabella */
#habit-calendar {
  border-collapse: separate;
  border-spacing: 0;
  overflow: visible; /* CRITICO: rimuove containing block che blocca sticky */
}

/* ============================================
   STICKY COLUMN - CROSS-BROWSER
   ============================================ */

/* Header colonna abitudini */
#habit-calendar th.habit-header-cell {
  position: sticky;
  left: 0;
  top: 0;
  z-index: 60;
  background: var(--surface-secondary);
  border-top-left-radius: 16px;
}

/* Angolo in alto a destra dell'ultima week-header */
#habit-calendar th.week-header:last-child {
  border-top-right-radius: 16px;
}

/* Body colonna abitudini */
#habit-calendar td.habit-name-cell,
#habit-calendar td.habit-column-cell {
  position: sticky;
  left: 0;
  z-index: 50;
  background: var(--surface-primary);
  contain: layout; /* Aiuta Firefox con sticky in tabelle */
  transform: translateZ(0); /* Forza compositor layer per Firefox */
  will-change: transform; /* Ottimizza Firefox */
}

/* Separatore interno (non esterno per non rompere rounding) */
#habit-calendar th.habit-header-cell,
#habit-calendar td.habit-name-cell,
#habit-calendar td.habit-column-cell {
  box-shadow: inset -1px 0 0 rgba(255,255,255,0.06);
}

/* Bottom-left rounding per ultima riga */
#habit-calendar tbody tr:last-child td.habit-name-cell,
#habit-calendar tbody tr:last-child td.habit-column-cell {
  border-bottom-left-radius: 16px;
}

/* ============================================
   FIREFOX - STICKY FALLBACK
   ============================================ */

/* Firefox: il th.habit-header-cell ora usa position:sticky nativo grazie alla
   rimozione di isolation:isolate sul wrapper (via @supports in app.css).
   I td del body restano statici come fallback sicuro per Firefox. */
.is-firefox #habit-calendar td.habit-name-cell,
.is-firefox #habit-calendar td.habit-column-cell {
  position: static;
  z-index: auto;
}

/* ============================================
   14. COMPONENTS - MODAL
   ============================================ */

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: var(--bg-overlay);
  backdrop-filter: blur(4px);
  z-index: var(--z-modal-backdrop);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), visibility var(--transition-base);
}

.modal-backdrop.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.95);
  z-index: var(--z-modal);
  width: min(90vw, 500px);
  max-height: 90vh;
  overflow-y: auto;
  background: var(--surface-primary);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-2xl);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.modal.active {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, -50%) scale(1);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--border-subtle);
}

.modal-title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
}

.modal-close {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: transparent;
  color: var(--text-tertiary);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.modal-close:hover {
  background: var(--interactive-hover);
  color: var(--text-primary);
}

.modal-body {
  padding: var(--space-6);
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--border-subtle);
  background: var(--surface-secondary);
}

/* ============================================
   15. COMPONENTS - TOGGLE & SWITCH
   ============================================ */

.toggle {
  position: relative;
  display: inline-flex;
  align-items: center;
  cursor: pointer;
}

.toggle-input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-track {
  width: 44px;
  height: 24px;
  background: var(--surface-tertiary);
  border-radius: var(--radius-full);
  transition: background var(--transition-fast);
}

.toggle-thumb {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 20px;
  height: 20px;
  background: var(--neutral-0);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast);
}

.toggle-input:checked + .toggle-track {
  background: var(--accent-500);
}

.toggle-input:checked + .toggle-track + .toggle-thumb {
  transform: translateX(20px);
}

.toggle-input:focus-visible + .toggle-track {
  outline: 2px solid var(--interactive-focus);
  outline-offset: 2px;
}

/* ============================================
   16. COMPONENTS - PROGRESS
   ============================================ */

.progress {
  height: 8px;
  background: var(--surface-tertiary);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background: var(--accent-500);
  border-radius: var(--radius-full);
  transition: width var(--transition-slow);
}

.progress-sm { height: 4px; }
.progress-lg { height: 12px; }

/* ============================================
   17. UTILITY CLASSES
   ============================================ */

/* Display */
.hidden { display: none !important; }
.block { display: block; }
.inline { display: inline; }
.inline-block { display: inline-block; }
.flex { display: flex; }
.inline-flex { display: inline-flex; }
.grid { display: grid; }

/* Flex Utilities */
.flex-col { flex-direction: column; }
.flex-row { flex-direction: row; }
.flex-wrap { flex-wrap: wrap; }
.items-start { align-items: flex-start; }
.items-center { align-items: center; }
.items-end { align-items: flex-end; }
.justify-start { justify-content: flex-start; }
.justify-center { justify-content: center; }
.justify-end { justify-content: flex-end; }
.justify-between { justify-content: space-between; }
.flex-1 { flex: 1; }
.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-5 { gap: var(--space-5); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

/* Spacing */
.m-0 { margin: 0; }
.m-auto { margin: auto; }
.mt-0 { margin-top: 0; }
.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mb-0 { margin-bottom: 0; }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }
.mx-auto { margin-left: auto; margin-right: auto; }

.p-0 { padding: 0; }
.p-2 { padding: var(--space-2); }
.p-4 { padding: var(--space-4); }
.p-6 { padding: var(--space-6); }
.p-8 { padding: var(--space-8); }
.px-4 { padding-left: var(--space-4); padding-right: var(--space-4); }
.px-6 { padding-left: var(--space-6); padding-right: var(--space-6); }
.py-4 { padding-top: var(--space-4); padding-bottom: var(--space-4); }
.py-6 { padding-top: var(--space-6); padding-bottom: var(--space-6); }

/* Text Alignment */
.text-left { text-align: left; }
.text-center { text-align: center; }
.text-right { text-align: right; }

/* Border Radius */
.rounded-none { border-radius: var(--radius-none); }
.rounded-sm { border-radius: var(--radius-sm); }
.rounded-md { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-2xl { border-radius: var(--radius-2xl); }
.rounded-full { border-radius: var(--radius-full); }

/* Width/Height */
.w-full { width: 100%; }
.h-full { height: 100%; }
.min-h-screen { min-height: 100vh; }

/* Overflow */
.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }
.overflow-x-auto { overflow-x: auto; }

/* Position */
.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }
.sticky { position: sticky; }

/* Cursor */
.cursor-pointer { cursor: pointer; }
.cursor-not-allowed { cursor: not-allowed; }

/* Opacity */
.opacity-0 { opacity: 0; }
.opacity-50 { opacity: 0.5; }
.opacity-75 { opacity: 0.75; }
.opacity-100 { opacity: 1; }

/* Transitions */
.transition { transition: all var(--transition-base); }
.transition-fast { transition: all var(--transition-fast); }
.transition-slow { transition: all var(--transition-slow); }

/* Divider */
.divider {
  height: 1px;
  background: var(--border-subtle);
  margin: var(--space-4) 0;
}

/* ============================================
   18. RESPONSIVE BREAKPOINTS
   ============================================ */

/* Mobile First Approach */
/* sm: 640px, md: 768px, lg: 1024px, xl: 1280px, 2xl: 1536px */

@media (max-width: 768px) {
  .app-shell[data-layout="sidebar"] .app-sidebar {
    transform: translateX(-100%);
    transition: transform var(--transition-base);
  }
  
  .app-shell[data-layout="sidebar"] .app-sidebar.open {
    transform: translateX(0);
  }
  
  .app-shell[data-layout="sidebar"] .app-main {
    margin-left: 0;
    width: 100%;
  }
  
  .container {
    padding: var(--space-4);
  }
  
  .page {
    padding: var(--space-4);
  }
  
  .hide-mobile { display: none !important; }
}

@media (min-width: 769px) {
  .hide-desktop { display: none !important; }
}

/* ============================================
   19. ANIMATIONS
   ============================================ */

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeOut {
  from { opacity: 1; }
  to { opacity: 0; }
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.animate-fade-in { animation: fadeIn var(--transition-base) forwards; }
.animate-slide-up { animation: slideUp var(--transition-base) forwards; }
.animate-slide-down { animation: slideDown var(--transition-base) forwards; }
.animate-scale-in { animation: scaleIn var(--transition-base) forwards; }
.animate-pulse { animation: pulse 2s infinite; }
.animate-spin { animation: spin 1s linear infinite; }

/* ============================================
   20. PRINT STYLES
   ============================================ */

@media print {
  .app-header,
  .app-sidebar,
  .btn,
  .no-print {
    display: none !important;
  }
  
  body {
    background: white;
    color: black;
  }
  
  .card {
    box-shadow: none;
    border: 1px solid #ddd;
  }
}

/* ============================================
   21. SHARED LANGUAGE PILL
   ============================================ */

.ks-locale-pill {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  min-height: 40px;
  padding: 2px;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  background: var(--surface-primary);
}

.ks-locale-pill__item {
  min-height: 40px;
  min-width: 68px;
  padding: 0 var(--space-2-5);
  border-radius: var(--radius-full);
  border: 1px solid transparent;
  text-decoration: none;
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1-5);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  letter-spacing: 0.02em;
  transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.ks-locale-pill__item:hover {
  color: var(--text-primary);
  background: var(--surface-interactive-hover);
}

.ks-locale-pill__item:focus-visible {
  outline: none;
  border-color: var(--accent-400);
  box-shadow: inset 0 0 0 1px rgba(251, 191, 36, 0.35), 0 0 0 2px rgba(251, 191, 36, 0.18);
}

.ks-locale-pill__item.is-active {
  color: var(--text-primary);
  background: color-mix(in srgb, var(--accent-400) 18%, var(--surface-primary));
  border-color: color-mix(in srgb, var(--accent-500) 45%, var(--border-default));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.16);
}

.ks-locale-pill__item.is-busy,
.ks-locale-pill__item[aria-disabled="true"] {
  opacity: 0.65;
  pointer-events: none;
}

.ks-locale-pill__flag {
  display: inline-block;
  border-radius: 2px;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.1);
}

.ks-locale-pill__label {
  line-height: 1;
}

.ks-locale-pill--compact .ks-locale-pill__item {
  min-width: 56px;
  padding: 0 var(--space-2);
}

.ks-locale-pill--settings {
  width: 100%;
  justify-content: center;
}

.ks-locale-pill--on-dark {
  background: rgba(10, 10, 12, 0.35);
  border-color: rgba(255, 255, 255, 0.2);
}

.ks-locale-pill--on-dark .ks-locale-pill__item {
  color: rgba(255, 255, 255, 0.82);
}

.ks-locale-pill--on-dark .ks-locale-pill__item:hover {
  color: var(--neutral-50);
  background: rgba(255, 255, 255, 0.08);
}

.ks-locale-pill--on-dark .ks-locale-pill__item.is-active {
  color: var(--neutral-50);
  background: rgba(251, 191, 36, 0.22);
  border-color: rgba(251, 191, 36, 0.45);
}

html[data-theme="dark"] .ks-locale-pill,
:root[data-theme="dark"] .ks-locale-pill,
.dark-theme .ks-locale-pill {
  background: rgba(255, 255, 255, 0.03);
  border-color: rgba(255, 255, 255, 0.12);
}

html[data-theme="dark"] .ks-locale-pill__item,
:root[data-theme="dark"] .ks-locale-pill__item,
.dark-theme .ks-locale-pill__item {
  color: rgba(245, 245, 245, 0.88);
}

html[data-theme="dark"] .ks-locale-pill__item:hover,
:root[data-theme="dark"] .ks-locale-pill__item:hover,
.dark-theme .ks-locale-pill__item:hover {
  color: var(--neutral-50);
  background: rgba(255, 255, 255, 0.08);
}

html[data-theme="dark"] .ks-locale-pill__item.is-active,
:root[data-theme="dark"] .ks-locale-pill__item.is-active,
.dark-theme .ks-locale-pill__item.is-active {
  background: rgba(251, 191, 36, 0.2);
  border-color: rgba(251, 191, 36, 0.42);
}