/* ═══════════════════════════════════════════════════════════════
   variables.css — Design tokens, reset and base typography
   Part of a three-file CSS architecture:
     variables.css  → tokens, reset, base, typography
     layout.css     → structural utilities and responsive breakpoints
     components.css → all UI component styles
═══════════════════════════════════════════════════════════════ */

/* ─────────────────────────────────────────
   1. DESIGN TOKENS
   Single source of truth for all colours, spacing,
   radii, shadows and motion values. All component
   styles reference these variables — never raw values.
───────────────────────────────────────── */
:root {
  /* Palette — light mode */
  --color-bg:          #f5f2ec;
  --color-bg-alt:      #eeeae2;
  --color-surface:     #ffffff;
  --color-ink:         #1a1916;
  --color-ink-2:       #4a4740;
  --color-ink-3:       #9a9790;
  --color-accent:      #b84030;
  --color-accent-soft: rgba(184, 64, 48, 0.08);
  --color-accent-mid:  rgba(184, 64, 48, 0.22);
  --color-border:      rgba(26, 25, 22, 0.1);
  --color-border-soft: rgba(26, 25, 22, 0.05);

  /* Typography */
  --font-display: 'Fraunces', Georgia, serif;
  --font-body:    'Figtree', system-ui, sans-serif;

  /* Spacing scale (8-pt base) */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-24: 6rem;

  /* Layout */
  --container-max: 1160px;
  --container-pad: clamp(1.25rem, 5vw, 2.5rem);
  --nav-height:    64px;
  --radius:        12px;
  --radius-sm:     6px;
  --radius-pill:   999px;

  /* Motion */
  --ease-out:    cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);

  /* Elevation shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.09), 0 1px 4px rgba(0,0,0,0.06);
  --shadow-lg: 0 12px 48px rgba(0,0,0,0.12), 0 4px 12px rgba(0,0,0,0.08);
}

/* Dark mode — overrides light palette only.
   All other tokens (spacing, radii, motion) remain unchanged. */
[data-theme="dark"] {
  --color-bg:          #111009;
  --color-bg-alt:      #181612;
  --color-surface:     #1e1c18;
  --color-ink:         #f0ece3;
  --color-ink-2:       #b0ada6;
  --color-ink-3:       #6a6760;
  --color-accent:      #e05540;
  --color-accent-soft: rgba(224, 85, 64, 0.1);
  --color-accent-mid:  rgba(224, 85, 64, 0.25);
  --color-border:      rgba(240, 236, 227, 0.1);
  --color-border-soft: rgba(240, 236, 227, 0.05);

  /* Deepen shadows to account for dark canvas */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.25);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.35);
  --shadow-lg: 0 12px 48px rgba(0,0,0,0.55);
}

/* ─────────────────────────────────────────
   2. RESET & BASE
   Minimal opinionated reset — normalises box model,
   removes default margins/padding, sets global defaults.
───────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  background-color: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.65;
  /* Smooth theme transitions — applied only to background/color
     to avoid inadvertently delaying layout-affecting properties */
  transition: background-color 0.4s, color 0.4s;
  overflow-x: hidden;
}

img, svg, video { display: block; max-width: 100%; }

a {
  color: inherit;
  text-decoration: none;
}

button {
  cursor: pointer;
  font-family: inherit;
  border: none;
  background: none;
}

/* Suppress list markers on semantic lists that use role="list"
   (these are styled explicitly in components) */
ul[role="list"],
ol[role="list"] { list-style: none; }

/* Visible focus ring — uses accent colour so it's always visible
   regardless of the surrounding context */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* Selection highlight matches brand accent */
::selection {
  background: var(--color-accent);
  color: #fff;
}

/* Custom scrollbar — WebKit only, degrades gracefully in Firefox */
::-webkit-scrollbar       { width: 5px; }
::-webkit-scrollbar-track { background: var(--color-bg); }
::-webkit-scrollbar-thumb { background: var(--color-accent); border-radius: 3px; }

/* ─────────────────────────────────────────
   3. TYPOGRAPHY SCALE
   Display headings use Fraunces (optical serif).
   Body/UI copy uses Figtree (geometric sans).
   Sizes are set in components — this block
   sets only shared type properties.
───────────────────────────────────────── */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--color-ink);
}

p { color: var(--color-ink-2); }
p + p { margin-top: var(--space-4); }

strong { color: var(--color-ink); font-weight: 600; }