@layer reset, base, components, modules, utilities;

:root {
  /* Spacing */
  --inline-space: 1rem;
  --inline-space-quarter: 0.25rem;
  --inline-space-half: 0.5rem;
  --inline-space-double: 2rem;
  --block-space: 1rem;
  --block-space-quarter: 0.25rem;
  --block-space-half: 0.5rem;
  --block-space-double: 2rem;

  /* Typography - System font stack for performance and privacy (no external requests) */
  --font-sans: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  --font-display: ui-sans-serif, system-ui, -apple-system, sans-serif;

  --text-2xs: 0.6875rem;
  --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;

  /* Radii */
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-2xl: 2rem;
  --radius-3xl: 2.5rem;
  --radius-pill: 999px;

  /* Layout */
  --container-max: 87rem;
  --container-padding: clamp(1rem, 3vw, 2rem);

  /* Shadows - Refined for depth without heaviness */
  --shadow-sm: 0 1px 3px 0 rgb(15 23 42 / 8%), 0 1px 2px -1px rgb(15 23 42 / 5%);
  --shadow-md: 0 4px 6px -1px rgb(15 23 42 / 10%), 0 2px 4px -2px rgb(15 23 42 / 8%);
  --shadow-lg: 0 10px 15px -3px rgb(15 23 42 / 12%), 0 4px 6px -4px rgb(15 23 42 / 8%);
  --shadow-xl: 0 20px 25px -5px rgb(15 23 42 / 10%), 0 8px 10px -6px rgb(15 23 42 / 8%);

  /* Palette */
  --color-white: #ffffff;
  --color-black: #0f172a;

  --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;
  --color-slate-950: #020617;

  --color-emerald-50: #ecfdf5;
  --color-emerald-100: #d1fae5;
  --color-emerald-200: #a7f3d0;
  --color-emerald-300: #6ee7b7;
  --color-emerald-400: #34d399;
  --color-emerald-500: #10b981;
  --color-emerald-600: #059669;
  --color-emerald-700: #047857;
  --color-emerald-800: #065f46;
  --color-emerald-900: #064e3b;

  --color-amber-50: #fffbeb;
  --color-amber-100: #fef3c7;
  --color-amber-200: #fde68a;
  --color-amber-500: #f59e0b;
  --color-amber-700: #b45309;

  --color-rose-50: #fff1f2;
  --color-rose-100: #ffe4e6;
  --color-rose-200: #fecdd3;
  --color-rose-600: #e11d48;
  --color-rose-700: #be123c;

  --color-sky-50: #f0f9ff;
  --color-sky-200: #bae6fd;
  --color-sky-500: #0ea5e9;
  --color-sky-700: #0369a1;

  /* Semantic */
  --color-canvas: var(--color-slate-50);
  --color-surface: var(--color-white);
  --color-ink: var(--color-slate-900);
  --color-ink-subtle: var(--color-slate-600);
  --color-ink-muted: var(--color-slate-500);
  --color-border: var(--color-slate-200);
  --color-border-strong: var(--color-slate-300);
  --color-link: var(--color-emerald-700);
  --color-accent: var(--color-emerald-500);
  --color-accent-strong: var(--color-emerald-600);
  --color-accent-soft: var(--color-emerald-100);
  --color-success: var(--color-emerald-600);
  --color-success-soft: var(--color-emerald-100);
  --color-warning: var(--color-amber-500);
  --color-warning-soft: var(--color-amber-100);
  --color-danger: var(--color-rose-600);
  --color-danger-soft: var(--color-rose-100);
  --color-info: var(--color-sky-700);
  --color-info-soft: var(--color-sky-50);

  /* Focus */
  --focus-ring-color: var(--color-accent);
  --focus-ring-size: 2px;
  --focus-ring-offset: 2px;

  /* Motion */
  --transition-fast: 120ms ease;
}

@media (max-width: 640px) {
  :root {
    --text-base: 1.05rem;
    --text-lg: 1.2rem;
    --text-xl: 1.35rem;
    --text-2xl: 1.6rem;
  }
}