:root {
  --bg: #fbfbfd;
  --fg: #1d1d1f;
  --muted: #6e6e73;
  --line: #e3e3e8;
  --card: #ffffff;
  --accent: #0a84ff;
  --code-bg: #f2f2f6;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111113;
    --fg: #f5f5f7;
    --muted: #a1a1a6;
    --line: #2c2c30;
    --card: #1a1a1d;
    --accent: #4aa3ff;
    --code-bg: #1f1f23;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 17px/1.55 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
main { max-width: 760px; margin: 0 auto; padding: 28px 20px 48px; }
nav { display: flex; gap: 20px; align-items: center; font-size: 15px; margin-bottom: 52px; }
nav .home { color: var(--fg); font-weight: 600; margin-right: auto; }
nav a[aria-current] { color: var(--fg); }
h1 { font-size: 44px; line-height: 1.1; letter-spacing: -0.02em; margin: 0 0 16px; }
h2 { font-size: 22px; letter-spacing: -0.01em; margin: 56px 0 14px; }
p { margin: 0 0 14px; }
.lede { font-size: 20px; color: var(--muted); max-width: 36em; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code, pre { font: 14px/1.5 ui-monospace, "SF Mono", Menlo, monospace; }
code { background: var(--code-bg); padding: 1px 5px; border-radius: 5px; }
pre {
  background: var(--code-bg);
  padding: 16px 18px;
  border-radius: 10px;
  overflow-x: auto;
  margin: 0 0 14px;
}
pre code { background: none; padding: 0; }
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 12px;
  margin-top: 8px;
}
.feature {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px 18px;
}
.feature strong { display: block; margin-bottom: 4px; }
.feature span { color: var(--muted); font-size: 15px; }
table { width: 100%; border-collapse: collapse; font-size: 15px; }
th, td { text-align: left; padding: 9px 10px 9px 0; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 500; }
td:first-child { white-space: nowrap; }
.table-wrap { overflow-x: auto; }
ol { padding-left: 22px; }
li { margin-bottom: 6px; }
.warn {
  border-left: 3px solid #ff9f0a;
  padding: 4px 0 4px 14px;
  margin: 18px 0;
}
.shot { margin: 18px 0 26px; }
.shot picture, .shot img { display: block; width: 100%; height: auto; }
.shot img { border-radius: 10px; border: 1px solid var(--line); box-shadow: 0 8px 30px rgba(0,0,0,.08); }
.shot.narrow img { max-width: 420px; }
.shot figcaption { color: var(--muted); font-size: 14px; margin-top: 8px; }
.steps { counter-reset: step; list-style: none; padding: 0; }
.steps > li { counter-increment: step; position: relative; padding-left: 44px; margin-bottom: 34px; }
.steps > li::before {
  content: counter(step); position: absolute; left: 0; top: 0;
  width: 30px; height: 30px; border-radius: 50%; background: var(--accent); color: #fff;
  font-weight: 600; font-size: 15px; display: flex; align-items: center; justify-content: center;
}
.steps h3 { font-size: 18px; margin: 2px 0 8px; }
footer {
  margin-top: 64px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}
.cta {
  display: inline-block; background: #0066cc; color: #fff; font-weight: 600;
  padding: 10px 18px; border-radius: 10px; margin: 10px 10px 0 0;
}
.cta:hover { text-decoration: none; filter: brightness(1.08); }
.cta.secondary { background: var(--code-bg); color: var(--fg); }
.toc { columns: 2; padding-left: 20px; font-size: 15px; }
h3 { font-size: 18px; margin: 32px 0 10px; }
@media (max-width: 520px) {
  nav { margin-bottom: 32px; }
  .toc { columns: 1; }
  h1 { font-size: 34px; }
  .lede { font-size: 18px; }
}
h3 small { font-size: 14px; font-weight: 500; color: var(--muted); }
.toc li { margin: 0; padding-bottom: 6px; break-inside: avoid; }