/* ============================================
   BuildGuide — Design Tokens / Custom Properties
   ============================================ */

:root {
  /* ---- Primary ---- */
  --color-primary-50:  #eff6ff;
  --color-primary-100: #dbeafe;
  --color-primary-200: #bfdbfe;
  --color-primary-300: #93c5fd;
  --color-primary-400: #60a5fa;
  --color-primary-500: #3b82f6;
  --color-primary-600: #1a56db;
  --color-primary-700: #1d4ed8;
  --color-primary-800: #1e40af;
  --color-primary-900: #1e3a8a;

  --color-primary:     var(--color-primary-600);
  --color-primary-hover: var(--color-primary-700);
  --color-primary-light: var(--color-primary-50);

  /* ---- Secondary / Green ---- */
  --color-secondary-50:  #f0fdf4;
  --color-secondary-100: #dcfce7;
  --color-secondary-200: #bbf7d0;
  --color-secondary-300: #86efac;
  --color-secondary-400: #4ade80;
  --color-secondary-500: #22c55e;
  --color-secondary-600: #16a34a;
  --color-secondary-700: #15803d;
  --color-secondary-800: #166534;
  --color-secondary-900: #14532d;

  --color-secondary:       var(--color-secondary-600);
  --color-secondary-hover:  var(--color-secondary-700);
  --color-verified:         var(--color-secondary-600);

  /* ---- Grays ---- */
  --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;

  /* ---- Semantic ---- */
  --color-danger:   #dc2626;
  --color-danger-light: #fef2f2;
  --color-warning:  #f59e0b;
  --color-warning-light: #fffbeb;
  --color-success:  #16a34a;
  --color-success-light: #f0fdf4;
  --color-info:     #1a56db;
  --color-info-light: #eff6ff;

  /* ---- Surfaces ---- */
  --color-bg:       #ffffff;
  --color-bg-alt:   var(--color-gray-50);
  --color-text:     var(--color-gray-900);
  --color-text-secondary: var(--color-gray-500);
  --color-text-muted: var(--color-gray-400);
  --color-border:   var(--color-gray-200);

  /* ---- Typography ---- */
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
    "Liberation Mono", monospace;

  --text-xs:   0.75rem;   /* 12px */
  --text-sm:   0.875rem;  /* 14px */
  --text-base: 1rem;      /* 16px */
  --text-lg:   1.125rem;  /* 18px */
  --text-xl:   1.25rem;   /* 20px */
  --text-2xl:  1.5rem;    /* 24px */
  --text-3xl:  1.875rem;  /* 30px */
  --text-4xl:  2.25rem;   /* 36px */

  --leading-tight:  1.25;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;

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

  /* ---- Spacing scale (4px base) ---- */
  --space-0:  0;
  --space-1:  0.25rem;   /* 4 */
  --space-2:  0.5rem;    /* 8 */
  --space-3:  0.75rem;   /* 12 */
  --space-4:  1rem;      /* 16 */
  --space-5:  1.25rem;   /* 20 */
  --space-6:  1.5rem;    /* 24 */
  --space-8:  2rem;      /* 32 */
  --space-10: 2.5rem;    /* 40 */
  --space-12: 3rem;      /* 48 */
  --space-16: 4rem;      /* 64 */
  --space-20: 5rem;      /* 80 */
  --space-24: 6rem;      /* 96 */

  /* ---- Border radius ---- */
  --radius-sm:   0.25rem;  /* 4px */
  --radius-md:   0.375rem; /* 6px */
  --radius-lg:   0.5rem;   /* 8px */
  --radius-xl:   0.75rem;  /* 12px */
  --radius-2xl:  1rem;     /* 16px */
  --radius-full: 9999px;

  /* ---- Shadows ---- */
  --shadow-xs:  0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-sm:  0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-md:  0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg:  0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl:  0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);

  /* ---- Transitions ---- */
  --transition-fast:   150ms ease;
  --transition-base:   200ms ease;
  --transition-slow:   300ms ease;
  --transition-spring: 300ms cubic-bezier(0.34, 1.56, 0.64, 1);

  /* ---- Z-index layers ---- */
  --z-dropdown:  100;
  --z-sticky:    200;
  --z-fixed:     300;
  --z-overlay:   400;
  --z-modal:     500;
  --z-toast:     600;

  /* ---- Layout ---- */
  --container-sm:  640px;
  --container-md:  768px;
  --container-lg:  1024px;
  --container-xl:  1200px;

  --header-height: 64px;
  --sidebar-width: 260px;
}