/* SparkBench Brand Tokens
   Drop this into your global stylesheet (or import as a module).
   Values match SPARKBENCH_BRAND.md exactly. */

:root {
  /* ── Colors ─────────────────────────────────────── */
  --sb-ink:       #1a1410;
  --sb-cream:     #fdf8ef;
  --sb-paper:     #fff4e6;
  --sb-slate:     #4a3f36;

  --sb-tangerine: #ff6b2b;
  --sb-teal:      #2ea3a3;
  --sb-lilac:     #b388eb;
  --sb-lemon:     #ffd23f;

  --sb-ink-08:    rgba(26,20,16,0.08);
  --sb-ink-12:    rgba(26,20,16,0.12);
  --sb-ink-20:    rgba(26,20,16,0.20);

  /* ── Fonts ──────────────────────────────────────── */
  --font-display: 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-serif:   'Fraunces', Georgia, serif;
  --font-mono:    'JetBrains Mono', ui-monospace, monospace;

  /* ── Radii ──────────────────────────────────────── */
  --sb-radius-sm: 8px;
  --sb-radius-md: 12px;
  --sb-radius-lg: 16px;
  --sb-radius-pill: 999px;

  /* ── Shadows ────────────────────────────────────── */
  --sb-shadow-sm: 0 4px 12px -6px rgba(26,20,16,0.15);
  --sb-shadow-md: 0 12px 24px -12px rgba(26,20,16,0.2);
  --sb-shadow-lg: 0 20px 40px -20px rgba(26,20,16,0.25);
}

/* Base */
html, body {
  background: var(--sb-cream);
  color: var(--sb-ink);
  font-family: var(--font-display);
  -webkit-font-smoothing: antialiased;
}

/* Italic highlight */
.sb-hl { font-family: var(--font-serif); font-style: italic; font-weight: 500; letter-spacing: -0.02em; }
.sb-hl--tang { color: var(--sb-tangerine); }
.sb-hl--teal { color: var(--sb-teal); }
.sb-hl--lilac { color: var(--sb-lilac); }

/* Buttons */
.sb-btn {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 15px;
  padding: 14px 24px;
  border-radius: var(--sb-radius-pill);
  border: none;
  cursor: pointer;
  transition: transform .12s ease, background .15s ease;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
}
.sb-btn:hover { transform: translateY(-1px); }
.sb-btn--primary { background: var(--sb-ink); color: var(--sb-cream); }
.sb-btn--primary:hover { background: #2a2018; }
.sb-btn--accent { background: var(--sb-tangerine); color: var(--sb-cream); }
.sb-btn--accent:hover { background: #f65a15; }
.sb-btn--ghost { background: transparent; color: var(--sb-ink); border: 1.5px solid var(--sb-ink); }
.sb-btn--ghost:hover { background: var(--sb-ink); color: var(--sb-cream); }

/* Tag */
.sb-tag {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--sb-slate);
}

/* Tile */
.sb-tile {
  border-radius: var(--sb-radius-lg);
  padding: 18px;
  min-height: 180px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  color: var(--sb-ink);
  text-decoration: none;
  transition: transform .15s ease, box-shadow .15s ease;
}
.sb-tile:hover { transform: translateY(-2px); box-shadow: var(--sb-shadow-md); }
.sb-tile__tag { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.12em; opacity: 0.75; text-transform: uppercase; }
.sb-tile__title { font-family: var(--font-display); font-size: 28px; font-weight: 700; letter-spacing: -0.02em; line-height: 1; margin: 0; }
.sb-tile__meta { display: flex; justify-content: space-between; align-items: center; font-family: var(--font-mono); font-size: 11px; opacity: 0.7; }
.sb-tile--paper { background: var(--sb-paper); }
.sb-tile--teal  { background: var(--sb-teal);     color: var(--sb-cream); }
.sb-tile--lemon { background: var(--sb-lemon); }
.sb-tile--ink   { background: var(--sb-ink);      color: var(--sb-cream); }
.sb-tile--lilac { background: var(--sb-lilac);    color: var(--sb-cream); }
.sb-tile--tang  { background: var(--sb-tangerine);color: var(--sb-cream); }
.sb-tile--cream { background: var(--sb-cream); border: 1px solid var(--sb-ink-20); }

/* Nav */
.sb-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 48px;
  background: var(--sb-cream);
}
.sb-nav__links { list-style: none; display: flex; gap: 32px; margin: 0; padding: 0; }
.sb-nav__links a {
  color: var(--sb-ink); text-decoration: none; font-size: 15px;
  padding: 6px 0; border-bottom: 1.5px solid transparent; transition: border-color .15s;
}
.sb-nav__links a:hover { border-color: var(--sb-tangerine); }

/* Hero */
.sb-hero__title {
  font-family: var(--font-display);
  font-size: clamp(40px, 7vw, 72px);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1;
  color: var(--sb-ink);
  max-width: 15ch;
  margin: 0;
  padding: 40px 48px 24px;
}

/* Experiment grid */
.sb-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  padding: 20px 48px 48px;
  max-width: 1280px;
  margin: 0 auto;
}
@media (max-width: 900px) {
  .sb-grid { grid-template-columns: repeat(2, 1fr); padding: 20px 24px 32px; }
  .sb-nav  { padding: 16px 24px; }
  .sb-hero__title { padding: 24px 24px 16px; }
}
@media (max-width: 560px) {
  .sb-grid { grid-template-columns: 1fr; }
}