:root {
  --bg: #fafaf9;
  --text: #1c1917;
  --muted: #57534e;
  --accent: #2563eb;
  --border: #e7e5e4;
  --card: #ffffff;
  --max: 720px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0c0a09;
    --text: #f5f5f4;
    --muted: #a8a29e;
    --accent: #60a5fa;
    --border: #292524;
    --card: #1c1917;
  }
}

:root[data-theme="dark"] {
  --bg: #0c0a09;
  --text: #f5f5f4;
  --muted: #a8a29e;
  --accent: #60a5fa;
  --border: #292524;
  --card: #1c1917;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.6;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.site-header {
  position: sticky;
  top: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: var(--max);
  margin: 0 auto;
  padding: 1rem;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}

.logo { font-weight: 700; color: var(--text); }

nav { display: flex; gap: 1rem; align-items: center; }
nav a { color: var(--muted); }

#theme-toggle {
  background: none;
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  padding: 0.2rem 0.5rem;
  cursor: pointer;
}

main { max-width: var(--max); margin: 0 auto; padding: 0 1rem; }

section { padding: 4rem 0; border-bottom: 1px solid var(--border); }
section:last-child { border-bottom: none; }

.hero { padding: 6rem 0 4rem; }
.eyebrow { color: var(--muted); margin: 0; }
h1 { font-size: clamp(2.5rem, 8vw, 4rem); margin: 0.2rem 0 1rem; line-height: 1.1; }
h2 { font-size: 1.5rem; margin-top: 0; }
.lead { font-size: 1.2rem; color: var(--muted); }

.actions { display: flex; gap: 0.75rem; flex-wrap: wrap; margin-top: 2rem; }
.btn {
  display: inline-block;
  padding: 0.6rem 1.2rem;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
}
.btn:hover { text-decoration: none; opacity: 0.9; }
.btn-ghost { background: transparent; color: var(--text); border: 1px solid var(--border); }

.tags, .links { list-style: none; padding: 0; display: flex; flex-wrap: wrap; gap: 0.5rem; }
.tags li {
  padding: 0.25rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.9rem;
  color: var(--muted);
}
.links { gap: 1.5rem; }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 1rem; }
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem;
}
.card h3 { margin-top: 0; }

.site-footer {
  max-width: var(--max);
  margin: 0 auto;
  padding: 2rem 1rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.legal { padding: 4rem 0; }
.legal h1 { font-size: 2.25rem; }
.legal h2 { margin-top: 2rem; }
.muted { color: var(--muted); }