:root {
  color-scheme: light;
  --bg: #ffffff;
  --bg-subtle: #f5f8fc;
  --surface: #f3f6fa;
  --text: #1b2430;
  --muted: #4a5668;
  --border: #d5dde8;
  --blue: #306998;
  --blue-strong: #255077;
  --yellow: #ffd43b;
  --purple: #9945ff;
  --mint: #14f195;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}
a { color: var(--blue-strong); }
nav {
  display: flex;
  gap: 18px;
  align-items: center;
  padding: 14px 24px;
  background: #fff;
  border-bottom: 3px solid var(--blue);
  position: sticky;
  top: 0;
}
nav .mark {
  margin: 0;
  font-size: 20px;
  text-decoration: none;
  color: var(--text);
  box-shadow: inset 0 -3px 0 var(--mint);
}
nav .mark .po { color: var(--yellow); font-weight: 800; }
nav .mark .so {
  font-weight: 800;
  background: linear-gradient(90deg, var(--mint) 0%, var(--purple) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
nav a.item { color: var(--muted); text-decoration: none; font-weight: 600; }
nav a.item:hover, nav a.item[aria-current="page"] { color: var(--blue-strong); }
.cmd {
  display: inline-block;
  margin-top: 22px;
  padding: 10px 18px;
  border: 1px solid var(--border);
  border-left: 4px solid var(--blue);
  border-radius: 8px;
  background: var(--surface);
  font-size: 15px;
}
.hero {
  padding: 56px 24px 28px;
  background:
    linear-gradient(#fff, #fff) padding-box,
    linear-gradient(90deg, var(--yellow), var(--mint)) border-box;
  border-bottom: 4px solid transparent;
}
.hero h1 { margin: 0 0 8px; font-size: 40px; letter-spacing: -0.03em; }
.hero p { margin: 0; max-width: 38rem; color: var(--muted); font-size: 18px; }
.actions { display: flex; gap: 10px; margin-top: 20px; flex-wrap: wrap; }
.actions a {
  display: inline-block;
  background: var(--blue);
  color: #fff;
  text-decoration: none;
  border-radius: 8px;
  padding: 10px 16px;
  font-weight: 650;
}
.actions a.quiet {
  background: #fff;
  color: var(--blue);
  border: 1px solid var(--border);
}
.wrap { max-width: 980px; margin: 0 auto; padding: 28px 24px 48px; }
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
pre, code {
  font-family: ui-monospace, Consolas, monospace;
}
pre {
  margin: 0;
  padding: 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: auto;
  font-size: 13px;
}
.cards, .steps, .commands {
  display: grid;
  gap: 12px;
}
.cards { grid-template-columns: repeat(3, 1fr); margin-top: 18px; }
.steps { grid-template-columns: 1fr 1fr; }
.card, .step, .command {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px;
  background: #fff;
}
.card { border-top: 4px solid var(--yellow); }
.step { border-left: 4px solid var(--mint); }
h2 { margin: 32px 0 8px; }
.note { color: var(--muted); font-size: 14px; }
footer {
  padding: 16px 24px 32px;
  color: var(--muted);
  font-size: 13px;
  border-top: 1px solid var(--border);
}
@media (max-width: 800px) {
  .split, .cards, .steps { grid-template-columns: 1fr; }
  .hero h1 { font-size: 30px; }
}