/* ==========================================================================
   Design Tokens — Premium Glass & Light
   ========================================================================== */

:root {
  /* Light mode (default) */
  --bg:              #f5f6fa;
  --bg-gradient:     linear-gradient(160deg, #f5f6fa 0%, #eef0f5 50%, #f0f2f8 100%);
  --surface-glass:   rgba(255, 255, 255, 0.72);
  --surface-solid:   #ffffff;
  --surface-hover:   #f1f4f9;
  --surface-raised:  #ffffff;

  --text:            #0f172a;
  --text-secondary:  #475569;
  --text-muted:      #94a3b8;
  --text-inverse:    #f8fafc;

  --border:          rgba(15, 23, 42, 0.06);
  --border-strong:   rgba(15, 23, 42, 0.10);
  --border-focus:    rgba(124, 58, 237, 0.30);

  --accent:          #7c3aed;
  --accent-light:    #a78bfa;
  --accent-dark:     #6d28d9;
  --accent-gradient: linear-gradient(135deg, #7c3aed 0%, #3b82f6 100%);
  --accent-glow:     rgba(124, 58, 237, 0.12);
  --accent-glow-strong: rgba(124, 58, 237, 0.25);

  --success:         #10b981;
  --success-bg:      rgba(16, 185, 129, 0.08);
  --success-glow:    rgba(16, 185, 129, 0.20);
  --danger:          #ef4444;
  --danger-bg:       rgba(239, 68, 68, 0.08);
  --warning:         #f59e0b;
  --warning-bg:      rgba(245, 158, 11, 0.08);
  --info:            #3b82f6;
  --info-bg:         rgba(59, 130, 246, 0.08);

  --radius-sm:       8px;
  --radius:          12px;
  --radius-lg:       16px;
  --radius-xl:       20px;

  --shadow-sm:       0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow:          0 2px 8px rgba(15, 23, 42, 0.06), 0 1px 3px rgba(15, 23, 42, 0.04);
  --shadow-md:       0 8px 24px rgba(15, 23, 42, 0.08), 0 2px 8px rgba(15, 23, 42, 0.04);
  --shadow-lg:       0 16px 40px rgba(15, 23, 42, 0.10), 0 4px 12px rgba(15, 23, 42, 0.05);
  --shadow-xl:       0 24px 60px rgba(15, 23, 42, 0.14);

  --font-sans:       'Inter', system-ui, -apple-system, sans-serif;
  --font-mono:       'JetBrains Mono', monospace;

  --blur-glass:      24px;
  --blur-overlay:    4px;

  --transition-fast: 150ms ease;
  --transition:      250ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 500ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* Dark mode — richer, deeper */
[data-theme="dark"] {
  --bg:              #08080f;
  --bg-gradient:     linear-gradient(160deg, #08080f 0%, #0d0d1a 50%, #0a0a16 100%);
  --surface-glass:   rgba(255, 255, 255, 0.04);
  --surface-solid:   #121220;
  --surface-hover:   rgba(255, 255, 255, 0.05);
  --surface-raised:  #181828;

  --text:            #e8ecf2;
  --text-secondary:  #9ca3b0;
  --text-muted:      #6b7280;
  --text-inverse:    #0f172a;

  --border:          rgba(255, 255, 255, 0.06);
  --border-strong:   rgba(255, 255, 255, 0.10);
  --border-focus:    rgba(124, 58, 237, 0.40);

  --shadow-sm:       0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow:          0 2px 8px rgba(0, 0, 0, 0.4), 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md:       0 8px 24px rgba(0, 0, 0, 0.5), 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-lg:       0 16px 40px rgba(0, 0, 0, 0.6), 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-xl:       0 24px 60px rgba(0, 0, 0, 0.7);
}