/* ===================================
   Design Tokens & Theme
   
   All visual constants are defined here.
   Modify these to change the app's look.
   =================================== */

:root {
  /* ── Background ── */
  --bg-base: #0a0f1e;
  --bg-elevated: #111827;
  --bg-surface: #1a2235;
  --bg-card: #1e293b;
  --bg-card-hover: #243044;

  /* ── Glass Effect ── */
  --glass-bg: rgba(30, 41, 59, 0.7);
  --glass-border: rgba(148, 163, 184, 0.1);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);

  /* ── Primary (Indigo) ── */
  --primary-50: #eef2ff;
  --primary-100: #e0e7ff;
  --primary-200: #c7d2fe;
  --primary-400: #818cf8;
  --primary-500: #6366f1;
  --primary-600: #4f46e5;
  --primary-700: #4338ca;

  /* ── Accent (Cyan) ── */
  --accent-400: #22d3ee;
  --accent-500: #06b6d4;

  /* ── Success (Emerald) ── */
  --success-400: #34d399;
  --success-500: #10b981;

  /* ── Warning (Amber) ── */
  --warning-400: #fbbf24;
  --warning-500: #f59e0b;

  /* ── Text ── */
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-inverse: #0f172a;

  /* ── Borders ── */
  --border-subtle: rgba(148, 163, 184, 0.08);
  --border-default: rgba(148, 163, 184, 0.15);
  --border-strong: rgba(148, 163, 184, 0.25);

  /* ── 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;

  /* ── Border Radius ── */
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.25rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  /* ── Typography ── */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --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;

  /* ── Shadows ── */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -2px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -4px rgba(0, 0, 0, 0.3);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.4);
  --shadow-glow-primary: 0 0 20px rgba(99, 102, 241, 0.15);
  --shadow-glow-success: 0 0 20px rgba(16, 185, 129, 0.15);

  /* ── Transitions ── */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  --duration-fast: 150ms;
  --duration-base: 250ms;
  --duration-slow: 400ms;
  --duration-flip: 500ms;

  /* ── Layout ── */
  --max-width: 480px;
}