/* ============================================================
   theme.css — Bootloop design tokens
   ============================================================
   Single source of truth for colors, typography, spacing,
   radius, shadows, transitions used across the app.

   Usage:
     <link rel="stylesheet" href="theme.css">
     <link rel="stylesheet" href="components.css">  <!-- when populated in M3 -->
     <style> /* page-specific styles using var(--xxx) */ </style>

   Always reference variables (e.g. var(--color-brand-500)) instead
   of hardcoding hex/px values, so retheming is a one-file change.

   Companion file: components.css (M3+, reusable component classes).
   See docs/design-system.md for the full reference.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
  /* ---------- Brand: Emerald (Bootloop green) ---------- */
  --color-brand-50:  #ECFDF5;
  --color-brand-100: #D1FAE5;
  --color-brand-200: #A7F3D0;
  --color-brand-300: #6EE7B7;
  --color-brand-400: #34D399;
  --color-brand-500: #10B981;  /* primary brand */
  --color-brand-600: #059669;
  --color-brand-700: #047857;
  --color-brand-800: #065F46;
  --color-brand-900: #064E3B;  /* Forest — hover/dark states */

  /* ---------- Neutrals: Slate ---------- */
  --color-slate-50:  #F8FAFC;
  --color-slate-100: #F1F5F9;
  --color-slate-200: #E2E8F0;
  --color-slate-300: #CBD5E1;
  --color-slate-400: #94A3B8;
  --color-slate-500: #64748B;
  --color-slate-600: #475569;
  --color-slate-700: #334155;
  --color-slate-800: #1E293B;
  --color-slate-900: #0F172A;

  /* ---------- Semantic colors ---------- */
  --color-success: var(--color-brand-500);
  --color-success-bg: var(--color-brand-50);
  --color-warning: #F59E0B;
  --color-warning-bg: #FFFBEB;
  --color-error: #EF4444;
  --color-error-bg: #FEF2F2;
  --color-info: #3B82F6;
  --color-info-bg: #EFF6FF;

  /* ---------- Surfaces & text ---------- */
  --color-bg-page:       var(--color-slate-50);
  --color-bg-surface:    #FFFFFF;
  --color-bg-elevated:   #FFFFFF;
  --color-border:        var(--color-slate-200);
  --color-border-strong: var(--color-slate-300);
  --color-text-primary:   var(--color-slate-900);
  --color-text-secondary: var(--color-slate-600);
  --color-text-muted:     var(--color-slate-400);
  --color-text-inverse:   #FFFFFF;
  --color-text-link:      var(--color-brand-600);
  --color-text-link-hover: var(--color-brand-900);

  /* ---------- Typography ---------- */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --fs-xs:   12px;
  --fs-sm:   14px;
  --fs-base: 16px;
  --fs-md:   18px;
  --fs-lg:   20px;
  --fs-xl:   24px;
  --fs-2xl:  30px;
  --fs-3xl:  36px;
  --fs-4xl:  48px;

  --fw-regular:  400;
  --fw-medium:   500;
  --fw-semibold: 600;
  --fw-bold:     700;

  --lh-tight:   1.2;
  --lh-snug:    1.35;
  --lh-normal:  1.5;
  --lh-relaxed: 1.65;

  /* ---------- Spacing scale (4px base, 12 steps) ---------- */
  --space-0:  0;
  --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;
  --space-24: 96px;

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

  /* ---------- Shadows (slate-tinted) ---------- */
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.08), 0 2px 4px -2px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.10), 0 4px 6px -4px rgba(15, 23, 42, 0.08);
  --shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, 0.12), 0 8px 10px -6px rgba(15, 23, 42, 0.08);

  /* ---------- Transitions ---------- */
  --transition-fast: 120ms ease-out;
  --transition-base: 200ms ease-out;
  --transition-slow: 320ms ease-out;
}

/* ---------- Base resets ---------- */
*, *::before, *::after { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: var(--lh-normal);
  color: var(--color-text-primary);
  background: var(--color-bg-page);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}