/*
  tokens.css — Design System Tokens
  ─────────────────────────────────
  All colors, spacing, type, radius, and shadow live here.
  No component-level values are defined here — this is pure
  primitives that components reference. This approach allows
  a future "theme" system by swapping out a single CSS file.

  Design philosophy:
  - Neutral palette inspired by Linear/Stripe/Notion
  - No gradients, no glows, no neon
  - Flat, structured, developer-tool aesthetic
*/

:root {
  /* ── Color Palette ─────────────────────────────── */
  --color-white: #ffffff;
  --color-black: #0a0a0a;

  /* Grays — the backbone of the UI */
  --color-gray-50:  #f9fafb;
  --color-gray-100: #f3f4f6;
  --color-gray-150: #eaecf0;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-400: #9ca3af;
  --color-gray-500: #6b7280;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2937;
  --color-gray-900: #111827;
  --color-gray-950: #030712;

  /* Blue — primary accent only. Used for CTAs, links, active states */
  --color-blue-50:  #eff6ff;
  --color-blue-100: #dbeafe;
  --color-blue-500: #3b82f6;
  --color-blue-600: #2563eb;
  --color-blue-700: #1d4ed8;

  /* Semantic Colors */
  --color-success: #16a34a;
  --color-success-bg: #f0fdf4;
  --color-success-border: #bbf7d0;

  --color-warning: #ca8a04;
  --color-warning-bg: #fefce8;
  --color-warning-border: #fef08a;

  --color-danger: #dc2626;
  --color-danger-bg: #fef2f2;
  --color-danger-border: #fecaca;

  --color-info: #0284c7;
  --color-info-bg: #f0f9ff;
  --color-info-border: #bae6fd;

  /* ── Surface Colors ─────────────────────────────── */
  --surface-page:     var(--color-gray-50);
  --surface-card:     var(--color-white);
  --surface-sidebar:  var(--color-white);
  --surface-header:   var(--color-white);
  --surface-overlay:  rgba(0, 0, 0, 0.4);
  --surface-code:     var(--color-gray-950);

  /* ── Border ─────────────────────────────────────── */
  --border-color:       var(--color-gray-200);
  --border-color-strong: var(--color-gray-300);
  --border-radius-sm:   4px;
  --border-radius-md:   6px;
  --border-radius-lg:   8px;

  /* ── Typography ─────────────────────────────────── */
  --font-sans: 'Inter', 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;

  --text-xs:   0.75rem;   /* 10.5px */
  --text-sm:   0.857rem;  /* 12px   */
  --text-base: 1rem;      /* 14px   */
  --text-md:   1.143rem;  /* 16px   */
  --text-lg:   1.286rem;  /* 18px   */
  --text-xl:   1.571rem;  /* 22px   */
  --text-2xl:  1.857rem;  /* 26px   */

  --font-weight-normal:   400;
  --font-weight-medium:   500;
  --font-weight-semibold: 600;
  --font-weight-bold:     700;

  --line-height-tight:  1.25;
  --line-height-base:   1.5;
  --line-height-relaxed: 1.75;

  /* Text Colors */
  --text-primary:   var(--color-gray-900);
  --text-secondary: var(--color-gray-600);
  --text-muted:     var(--color-gray-400);
  --text-link:      var(--color-blue-600);
  --text-on-dark:   var(--color-white);

  /* ── Spacing (4px base unit) ─────────────────────── */
  --space-1:  4px;
  --space-2:  8px;
  --space-3:  12px;
  --space-4:  16px;
  --space-5:  20px;
  --space-6:  24px;
  --space-8:  32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;

  /* ── Shadows ─────────────────────────────────────── */
  --shadow-xs: 0 1px 2px 0 rgba(0,0,0,0.05);
  --shadow-sm: 0 1px 3px 0 rgba(0,0,0,0.08), 0 1px 2px -1px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.06);

  /* ── Layout ──────────────────────────────────────── */
  --sidebar-width: 220px;
  --header-height: 52px;
  --panel-min-width: 300px;

  /* ── Transitions ─────────────────────────────────── */
  --transition-fast: 100ms ease;
  --transition-base: 150ms ease;
  --transition-slow: 250ms ease;

  /* ── Z-Index Scale ───────────────────────────────── */
  --z-base:       0;
  --z-raised:     10;
  --z-dropdown:   100;
  --z-overlay:    200;
  --z-modal:      300;
  --z-toast:      400;
}

/* ── Dark Mode Overrides ────────────────────────── */
[data-theme="dark"] {
  --color-white: #111111;
  --color-black: #f9fafb;

  --color-gray-50:  #0a0a0a;
  --color-gray-100: #1a1a1a;
  --color-gray-150: #222222;
  --color-gray-200: #2a2a2a;
  --color-gray-300: #333333;
  --color-gray-400: #666666;
  --color-gray-500: #888888;
  --color-gray-600: #aaaaaa;
  --color-gray-700: #cccccc;
  --color-gray-800: #e2e2e2;
  --color-gray-900: #f5f5f5;
  --color-gray-950: #ffffff;

  --surface-page:     #050505;
  --surface-card:     #111111;
  --surface-sidebar:  #0a0a0a;
  --surface-header:   #0a0a0a;
  --surface-code:     #000000;

  --border-color:       #2a2a2a;
  --border-color-strong: #333333;

  --text-primary:   #ededed;
  --text-secondary: #a1a1aa;
  --text-muted:     #71717a;
  --text-on-dark:   #050505;

  --shadow-xs: 0 1px 2px 0 rgba(0,0,0,0.5);
  --shadow-sm: 0 1px 3px 0 rgba(0,0,0,0.8), 0 1px 2px -1px rgba(0,0,0,0.6);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.7), 0 2px 4px -2px rgba(0,0,0,0.6);
}