:root {
  color-scheme: light dark;
  --bg: #f6f4ef;
  --fg: #1c1b19;
  --muted: #5c574f;
  --card: #ffffffcc;
  --accent: #0f6b5c;
  --line: #d9d2c5;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --sans: "Segoe UI", system-ui, -apple-system, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121411;
    --fg: #ece8df;
    --muted: #b3ab9c;
    --card: #1c1f1bcc;
    --accent: #6fd3bf;
    --line: #2d322c;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--sans);
  line-height: 1.6;
  color: var(--fg);
  background:
    radial-gradient(1200px 500px at 10% -10%, #cdeee5 0%, transparent 55%),
    radial-gradient(900px 400px at 100% 0%, #f0e2c8 0%, transparent 50%),
    var(--bg);
  min-height: 100vh;
}

.site-header,
main,
footer {
  width: min(720px, calc(100% - 2rem));
  margin-left: auto;
  margin-right: auto;
}

.site-header {
  display: flex;
  gap: 1rem;
  align-items: center;
  padding: 2.5rem 0 1rem;
}

.site-header h1 {
  margin: 0;
  font-size: 1.75rem;
  letter-spacing: -0.02em;
}

.site-header p {
  margin: 0.25rem 0 0;
  color: var(--muted);
}

main {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 1.25rem 1.4rem 1.5rem;
  backdrop-filter: blur(8px);
}

section + section { margin-top: 1.4rem; }

h2 {
  margin: 0 0 0.6rem;
  font-size: 1.05rem;
  color: var(--accent);
}

ul {
  margin: 0;
  padding-left: 1.15rem;
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

.cover {
  display: block;
  width: 100%;
  height: auto;
  margin-top: 1.4rem;
  border-radius: 12px;
  border: 1px solid var(--line);
}

pre {
  margin: 0;
  padding: 0.9rem 1rem;
  overflow: auto;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 70%, transparent);
  font-family: var(--mono);
  font-size: 0.9rem;
}

footer {
  padding: 1.2rem 0 2.5rem;
  color: var(--muted);
  font-size: 0.92rem;
}