/* =========================================================
   Stag Head — shared design tokens
   ========================================================= */

:root {
  /* Accent hue (tweakable) — logo amber */
  --accent-h: 70;
  --accent-c: 0.14;
  --accent-l: 0.72;
  --accent: oklch(var(--accent-l) var(--accent-c) var(--accent-h));
  --accent-soft: oklch(var(--accent-l) var(--accent-c) var(--accent-h) / 0.14);
  --accent-line: oklch(var(--accent-l) var(--accent-c) var(--accent-h) / 0.35);
  --accent-ink: oklch(0.3 0.08 var(--accent-h)); /* dark amber for light-mode text */

  /* Light mode (default) */
  --bg: oklch(0.985 0.003 80);
  --bg-elev: oklch(0.975 0.004 80);
  --bg-sunk: oklch(0.955 0.005 80);
  --ink: oklch(0.18 0.01 80);
  --ink-2: oklch(0.38 0.008 80);
  --ink-3: oklch(0.55 0.006 80);
  --line: oklch(0.88 0.004 80);
  --line-strong: oklch(0.78 0.005 80);

  /* Type */
  --font-display: "Space Grotesk", ui-sans-serif, system-ui, sans-serif;
  --font-body: "Inter", ui-sans-serif, system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  /* Geometry */
  --radius-sm: 4px;
  --radius: 8px;
  --radius-lg: 14px;

  --maxw: 1280px;
  --gutter: clamp(20px, 3vw, 48px);
}

[data-theme="dark"] {
  --bg: oklch(0.145 0.006 80);
  --bg-elev: oklch(0.185 0.006 80);
  --bg-sunk: oklch(0.115 0.005 80);
  --ink: oklch(0.97 0.004 80);
  --ink-2: oklch(0.78 0.006 80);
  --ink-3: oklch(0.58 0.007 80);
  --line: oklch(0.28 0.006 80);
  --line-strong: oklch(0.4 0.007 80);
  --accent-ink: oklch(0.88 0.13 var(--accent-h));
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  transition: background .3s ease, color .3s ease;
}

::selection { background: var(--accent); color: oklch(0.15 0.02 80); }

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

.mono { font-family: var(--font-mono); font-feature-settings: "zero", "ss01"; letter-spacing: -0.01em; }
.display { font-family: var(--font-display); letter-spacing: -0.02em; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-3);
}

/* ===== Shared shell ===== */
.shell { max-width: var(--maxw); margin: 0 auto; padding: 0 var(--gutter); }

/* ===== Top nav (shared across variations) ===== */
.topnav {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in oklab, var(--bg) 88%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.topnav__inner {
  max-width: var(--maxw); margin: 0 auto;
  padding: 14px var(--gutter);
  display: flex; align-items: center; gap: 24px;
}
.brand {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--font-display); font-weight: 600;
  letter-spacing: 0.02em;
  text-decoration: none;
}
.brand__logo {
  display: block;
  height: 32px;
  width: 32px;
  object-fit: contain;
}
.brand__mark {
  width: 28px; height: 28px; display: inline-grid; place-items: center;
}
.brand__text { font-size: 15px; }
.brand__text b { font-weight: 700; }

.nav-variants {
  display: flex; gap: 4px; margin-left: auto;
  padding: 4px; border: 1px solid var(--line); border-radius: 999px;
  background: var(--bg-elev);
}
.nav-variants a {
  padding: 6px 12px; border-radius: 999px;
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.06em;
  text-transform: uppercase; color: var(--ink-2);
  transition: background .15s ease, color .15s ease;
}
.nav-variants a.is-active { background: var(--ink); color: var(--bg); }
.nav-variants a:hover:not(.is-active) { color: var(--ink); }

.nav-links { display: flex; gap: 22px; font-size: 14px; color: var(--ink-2); }
.nav-links a:hover { color: var(--ink); }

.cta-btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 16px; border-radius: 999px;
  background: var(--ink); color: var(--bg);
  font-size: 13px; font-weight: 500;
  transition: transform .15s ease, background .15s ease;
  border: 1px solid var(--ink);
}
.cta-btn:hover { transform: translateY(-1px); }
.cta-btn--ghost { background: transparent; color: var(--ink); }
.cta-btn--accent { background: var(--accent); color: oklch(0.18 0.02 80); border-color: var(--accent); }

/* Footer */
.foot {
  border-top: 1px solid var(--line);
  padding: 40px var(--gutter);
  color: var(--ink-3);
  font-size: 13px;
  display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap;
  margin-top: 80px;
}
.foot .mono { font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; }

/* Utility animations */
@keyframes fadeup { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: none; } }
.fadeup { animation: fadeup .6s ease both; }

/* Hexagon SVG helper */
.hex-stroke { fill: none; stroke: currentColor; stroke-width: 1.5; }