:root {
  --bg: #fafafa;
  --fg: #1a1a1a;
  --muted: #666;
  --line: #e4e4e4;
  --code-bg: #f0f0f0;
  --accent: #1a1a1a;
  --topbg: rgba(250, 250, 250, 0.92);
  --max: 740px;
}
:root[data-theme="dark"] {
  --bg: #111;
  --fg: #f0f0f0;
  --muted: #a0a0a0;
  --line: #2b2b2b;
  --code-bg: #232323;
  --accent: #000;
  --topbg: rgba(17, 17, 17, 0.92);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
}
.top {
  position: sticky;
  top: 0;
  background: var(--topbg);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
nav {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0.7rem 1.2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.brand {
  font-weight: 700;
  letter-spacing: -0.02em;
  text-decoration: none;
  color: var(--fg);
}
.links { display: flex; gap: 1rem; flex-wrap: wrap; }
.links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.9rem;
}
.links a:hover, .links a.active { color: var(--fg); }
#theme {
  background: transparent;
  border: 0;
  padding: 0;
  margin: 0;
  color: var(--muted);
  font: inherit;
  font-size: 0.9rem;
  cursor: pointer;
}
#theme:hover { color: var(--fg); }
main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 2rem 1.2rem 4rem;
}
.hero { padding: 3rem 0 2rem; }
.hero h1 {
  font-size: 3rem;
  margin: 0 0 0.5rem;
  letter-spacing: -0.04em;
}
.hero p { font-size: 1.15rem; color: var(--muted); max-width: 34rem; }
.badges { display: flex; gap: 0.5rem; margin-top: 1rem; }
.badges span {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.15rem 0.7rem;
  font-size: 0.8rem;
  color: var(--muted);
}
section { margin-top: 3rem; }
h2 {
  font-size: 1.5rem;
  letter-spacing: -0.02em;
  border-bottom: 1px solid var(--line);
  padding-bottom: 0.4rem;
}
h3 { font-size: 1.1rem; margin-top: 2rem; }
a { color: var(--fg); }
p code, li code, td code {
  background: var(--code-bg);
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  font-size: 0.88em;
}
pre {
  position: relative;
  background: var(--accent);
  color: #f5f5f5;
  border-radius: 8px;
  padding: 1rem 1.1rem;
  overflow-x: auto;
  font-size: 0.85rem;
  line-height: 1.6;
}
pre code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.copy {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  border: 1px solid #444;
  background: transparent;
  color: #bbb;
  border-radius: 6px;
  font-size: 0.75rem;
  padding: 0.2rem 0.55rem;
  cursor: pointer;
}
.copy:hover { color: #fff; border-color: #888; }
ol, ul { padding-left: 1.3rem; }
li { margin-bottom: 0.4rem; }
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  margin-top: 1rem;
}
th, td {
  text-align: left;
  padding: 0.5rem 0.6rem;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
th { font-weight: 600; }
footer {
  border-top: 1px solid var(--line);
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
  padding: 1.5rem;
}
@media (max-width: 640px) {
  .hero h1 { font-size: 2.2rem; }
  .links { gap: 0.7rem; }
}