:root {
  --bg: #0c0c0e;
  --bg-elev: #1c1c1f;
  --text: #f4f4f4;
  --muted: #8a8a92;
  --line: rgba(255, 255, 255, 0.12);
  --accent: #ffd60a;
  --gold: #ffd60a;
  --max: 40rem;
  --font: ui-sans-serif, system-ui, -apple-system, 'Segoe UI', Roboto, 'PingFang SC',
    'Noto Sans SC', sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

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

a:hover {
  text-decoration: underline;
}

.wrap {
  width: min(100% - 2rem, var(--max));
  margin: 0 auto;
  padding: 2.5rem 0 4rem;
}

header.site {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 2.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--line);
}

.brand {
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
  text-decoration: none;
}

.brand:hover {
  text-decoration: none;
  color: var(--gold);
}

.brand span {
  color: var(--muted);
  font-weight: 500;
  margin-left: 0.35rem;
}

nav a {
  color: var(--muted);
  font-size: 0.92rem;
  margin-left: 1rem;
}

nav a:hover,
nav a[aria-current='page'] {
  color: var(--text);
}

h1 {
  font-size: clamp(1.6rem, 4vw, 2rem);
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin: 0 0 0.75rem;
}

h2 {
  font-size: 1.1rem;
  margin: 2rem 0 0.6rem;
  letter-spacing: -0.02em;
}

.lead {
  color: var(--muted);
  font-size: 1.05rem;
  margin: 0 0 1.75rem;
}

.card {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1.15rem 1.25rem;
  margin: 0 0 0.85rem;
}

.card h2 {
  margin: 0 0 0.4rem;
  font-size: 1rem;
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.cards {
  display: grid;
  gap: 0.85rem;
}

ul {
  padding-left: 1.2rem;
  color: var(--muted);
}

li {
  margin: 0.35rem 0;
}

.meta {
  margin-top: 2.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.85rem;
}

.btn {
  display: inline-block;
  margin-top: 0.75rem;
  padding: 0.65rem 1rem;
  border-radius: 999px;
  background: var(--accent);
  color: #121214;
  font-weight: 600;
  font-size: 0.95rem;
}

.btn:hover {
  text-decoration: none;
  filter: brightness(1.05);
}

.mark {
  display: block;
  width: 64px;
  height: 64px;
  border-radius: 16px;
  margin: 0 0 1.25rem;
  border: 1px solid var(--line);
}

.lang {
  color: var(--muted);
  font-size: 0.8rem;
  margin-bottom: 0.5rem;
}

.warn {
  border-color: rgba(255, 214, 10, 0.45);
  background: rgba(255, 214, 10, 0.08);
}

.warn p {
  color: var(--gold);
}

code {
  font-size: 0.9em;
}