/* ==========================================================================
   variables.css — Design Tokens & Custom Properties
   Ramayana: Beyond What We Were Told
   ========================================================================== */

/* --------------------------------------------------------------------------
   Google Fonts Import
   -------------------------------------------------------------------------- */
@import url('https://fonts.googleapis.com/css2?family=Cinzel:wght@400;500;600;700&family=Inter:wght@300;400;500;600;700&family=Noto+Serif+Devanagari:wght@400;500;600;700&display=swap');

/* --------------------------------------------------------------------------
   Light Theme (Default) — White & Blue
   -------------------------------------------------------------------------- */
:root {
  /* Background layers */
  --bg-deepest: #FFFFFF;
  --bg-deep: #F8FAFC;
  --bg-surface: #F1F5F9;
  --bg-elevated: #FFFFFF;
  --bg-hover: #E2E8F0;

  /* Text colors */
  --text-primary: #1E293B;
  --text-secondary: #475569;
  --text-tertiary: #94A3B8;
  --text-inverse: #FFFFFF;

  /* Accent colors — blue family */
  --accent: #2563EB;
  --accent-light: #3B82F6;
  --accent-dim: #1D4ED8;
  --accent-glow: rgba(37, 99, 235, 0.12);
  --accent-warm: #1E40AF;
  --accent-warm-light: #2563EB;
  --maroon: #DC2626;
  --maroon-deep: #B91C1C;
  --parchment: #1E293B;

  /* Legacy aliases for gold → accent (used by components) */
  --gold: #2563EB;
  --gold-light: #3B82F6;
  --gold-dim: #1D4ED8;
  --gold-glow: rgba(37, 99, 235, 0.12);
  --saffron: #1E40AF;
  --saffron-light: #2563EB;

  /* Confidence badge colors */
  --badge-attested: #16A34A;
  --badge-attested-bg: rgba(22, 163, 74, 0.10);
  --badge-tradition: #2563EB;
  --badge-tradition-bg: rgba(37, 99, 235, 0.10);
  --badge-interpretation: #7C3AED;
  --badge-interpretation-bg: rgba(124, 58, 237, 0.10);
  --badge-debated: #DC2626;
  --badge-debated-bg: rgba(220, 38, 38, 0.08);

  /* Source badge colors */
  --source-primary: #2563EB;
  --source-primary-bg: rgba(37, 99, 235, 0.08);
  --source-critical: #16A34A;
  --source-critical-bg: rgba(22, 163, 74, 0.08);
  --source-academic: #7C3AED;
  --source-academic-bg: rgba(124, 58, 237, 0.08);
  --source-commentary: #D97706;
  --source-commentary-bg: rgba(217, 119, 6, 0.08);

  /* Borders */
  --border-subtle: rgba(30, 41, 59, 0.06);
  --border-default: rgba(30, 41, 59, 0.12);
  --border-strong: rgba(30, 41, 59, 0.20);
  --border-gold: rgba(37, 99, 235, 0.30);

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(30, 41, 59, 0.06);
  --shadow-md: 0 4px 12px rgba(30, 41, 59, 0.08);
  --shadow-lg: 0 8px 32px rgba(30, 41, 59, 0.10);
  --shadow-gold: 0 4px 20px rgba(37, 99, 235, 0.10);

  /* Overlay */
  --overlay: rgba(255, 255, 255, 0.92);

  /* Scrollbar */
  --scrollbar-track: #F1F5F9;
  --scrollbar-thumb: #94A3B8;

  /* Selection */
  --selection-bg: rgba(37, 99, 235, 0.20);
  --selection-text: #1E293B;

  /* --------------------------------------------------------------------------
     Typography
     -------------------------------------------------------------------------- */
  --font-heading: 'Cinzel', 'Georgia', 'Times New Roman', serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-devanagari: 'Noto Serif Devanagari', 'Siddhanta', serif;

  /* Font sizes — modular scale ~1.25 */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  --text-6xl: 3.75rem;

  /* Font weights */
  --weight-light: 300;
  --weight-regular: 400;
  --weight-medium: 500;
  --weight-semibold: 600;
  --weight-bold: 700;

  /* Line heights */
  --leading-tight: 1.2;
  --leading-snug: 1.4;
  --leading-normal: 1.6;
  --leading-relaxed: 1.75;
  --leading-loose: 2;

  /* Letter spacing */
  --tracking-tight: -0.02em;
  --tracking-normal: 0;
  --tracking-wide: 0.05em;
  --tracking-wider: 0.1em;
  --tracking-widest: 0.2em;

  /* --------------------------------------------------------------------------
     Spacing Scale
     -------------------------------------------------------------------------- */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* --------------------------------------------------------------------------
     Layout
     -------------------------------------------------------------------------- */
  --content-max-width: 780px;
  --site-max-width: 1200px;
  --header-height: 64px;
  --sidebar-width: 280px;

  /* --------------------------------------------------------------------------
     Border Radius
     -------------------------------------------------------------------------- */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* --------------------------------------------------------------------------
     Transitions
     -------------------------------------------------------------------------- */
  --ease-default: cubic-bezier(0.25, 0.1, 0.25, 1);
  --ease-in-out: cubic-bezier(0.42, 0, 0.58, 1);
  --ease-out: cubic-bezier(0, 0, 0.2, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);

  --duration-fast: 150ms;
  --duration-normal: 250ms;
  --duration-slow: 400ms;

  --transition-colors: color var(--duration-normal) var(--ease-default),
                       background-color var(--duration-normal) var(--ease-default),
                       border-color var(--duration-normal) var(--ease-default);
  --transition-transform: transform var(--duration-normal) var(--ease-out);
  --transition-shadow: box-shadow var(--duration-normal) var(--ease-default);
  --transition-opacity: opacity var(--duration-normal) var(--ease-default);

  /* --------------------------------------------------------------------------
     Z-Index Scale
     -------------------------------------------------------------------------- */
  --z-behind: -1;
  --z-base: 0;
  --z-raised: 10;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-header: 300;
  --z-overlay: 400;
  --z-modal: 500;
  --z-toast: 600;
  --z-max: 9999;

  /* --------------------------------------------------------------------------
     Reading progress bar
     -------------------------------------------------------------------------- */
  --reading-progress: 0%;
}

/* --------------------------------------------------------------------------
   Dark / Night Mode
   -------------------------------------------------------------------------- */
html[data-theme="dark"] {
  --bg-deepest: #0F172A;
  --bg-deep: #1E293B;
  --bg-surface: #1E293B;
  --bg-elevated: #334155;
  --bg-hover: #334155;

  --text-primary: #F1F5F9;
  --text-secondary: #CBD5E1;
  --text-tertiary: #94A3B8;
  --text-inverse: #0F172A;

  --accent: #60A5FA;
  --accent-light: #93C5FD;
  --accent-dim: #3B82F6;
  --accent-glow: rgba(96, 165, 250, 0.20);

  --gold: #60A5FA;
  --gold-light: #93C5FD;
  --gold-dim: #3B82F6;
  --gold-glow: rgba(96, 165, 250, 0.20);
  --saffron: #3B82F6;
  --saffron-light: #60A5FA;

  --border-subtle: rgba(241, 245, 249, 0.06);
  --border-default: rgba(241, 245, 249, 0.12);
  --border-strong: rgba(241, 245, 249, 0.20);
  --border-gold: rgba(96, 165, 250, 0.40);

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  --shadow-gold: 0 4px 20px rgba(96, 165, 250, 0.15);

  --overlay: rgba(15, 23, 42, 0.85);

  --scrollbar-track: #1E293B;
  --scrollbar-thumb: #475569;

  --selection-bg: rgba(96, 165, 250, 0.30);
  --selection-text: #F1F5F9;

  --badge-attested-bg: rgba(22, 163, 74, 0.15);
  --badge-tradition-bg: rgba(96, 165, 250, 0.15);
  --badge-interpretation-bg: rgba(124, 58, 237, 0.15);
  --badge-debated-bg: rgba(220, 38, 38, 0.12);

  --source-primary-bg: rgba(96, 165, 250, 0.12);
  --source-critical-bg: rgba(22, 163, 74, 0.12);
  --source-academic-bg: rgba(124, 58, 237, 0.12);
  --source-commentary-bg: rgba(217, 119, 6, 0.12);
}