/* ==========================================================================
   SmileCare Dental — Design Tokens & Variables
   ========================================================================== */

:root {
  /* --- Color Palette --- */
  --color-primary-50:  #eff8ff;
  --color-primary-100: #dbeafe;
  --color-primary-200: #bfdbfe;
  --color-primary-300: #93c5fd;
  --color-primary-400: #60a5fa;
  --color-primary-500: #0ea5e9;
  --color-primary-600: #0284c7;
  --color-primary-700: #0369a1;
  --color-primary-800: #075985;
  --color-primary-900: #0c4a6e;

  --color-accent-50:  #f0fdfa;
  --color-accent-100: #ccfbf1;
  --color-accent-200: #99f6e4;
  --color-accent-300: #5eead4;
  --color-accent-400: #2dd4bf;
  --color-accent-500: #14b8a6;
  --color-accent-600: #0d9488;
  --color-accent-700: #0f766e;
  --color-accent-800: #115e59;
  --color-accent-900: #134e4a;

  --color-gray-50:  #f9fafb;
  --color-gray-100: #f3f4f6;
  --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-white:  #ffffff;
  --color-black:  #000000;

  --color-warning: #f59e0b;
  --color-error:   #ef4444;
  --color-success: #10b981;

  /* --- Typography --- */
  --font-sans:    'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --font-display: 'Playfair Display', Georgia, 'Times New Roman', 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;
  --text-5xl:  3rem;
  --text-6xl:  3.75rem;

  --leading-tight:   1.15;
  --leading-snug:    1.35;
  --leading-normal:  1.6;
  --leading-relaxed: 1.75;

  --tracking-tight:  -0.025em;
  --tracking-wide:    0.05em;
  --tracking-wider:   0.1em;

  /* --- Spacing --- */
  --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;

  /* --- Radius --- */
  --radius-sm:   6px;
  --radius-md:   10px;
  --radius-lg:   16px;
  --radius-xl:   20px;
  --radius-2xl:  24px;
  --radius-full: 9999px;

  /* --- Shadows --- */
  --shadow-sm:   0 1px 2px rgba(0,0,0,0.04);
  --shadow-md:   0 4px 12px rgba(0,0,0,0.06);
  --shadow-lg:   0 8px 30px rgba(0,0,0,0.08);
  --shadow-xl:   0 20px 60px rgba(0,0,0,0.06);
  --shadow-2xl:  0 30px 80px rgba(0,0,0,0.08);
  --shadow-glow: 0 4px 20px rgba(14,165,233,0.25);

  /* --- Transitions --- */
  --transition-fast:   150ms ease;
  --transition-base:   300ms ease;
  --transition-slow:   500ms ease;
  --transition-spring: 500ms cubic-bezier(0.22, 1, 0.36, 1);

  /* --- Z-index --- */
  --z-navbar:    1000;
  --z-overlay:   900;
  --z-modal:     800;
  --z-dropdown:  700;
  --z-header:    600;
}