:root {
  --bg: #f1f1f2; --bar: #f9f9fa; --line: #e0e0e3; --text: #25221e; --muted: #6b6f76;
  --accent: #2f6fe4; --soft: rgba(47, 111, 228, .1); --code: #e9eaec;
}
:root[data-theme="dark"] {
  --bg: #121417; --bar: #1a1d21; --line: #2a2f36; --text: #e5e7ea; --muted: #8b94a1;
  --accent: #5a9bff; --soft: rgba(90, 155, 255, .14); --code: #262a30;
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 16px/1.7 "Segoe UI", "Malgun Gothic", system-ui, -apple-system, Arial, sans-serif;
}
a { color: var(--accent); }
.site-head {
  display: flex; align-items: center; gap: 18px; flex-wrap: wrap; padding: 12px 24px;
  background: var(--bar); border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: 9px; font-weight: 700; font-size: 18px; color: var(--text); text-decoration: none; }
.logo { width: 26px; height: 26px; display: block; }
.site-nav { display: flex; flex-wrap: wrap; gap: 4px 18px; margin-left: 8px; flex: 1; }
.site-nav a { color: var(--muted); text-decoration: none; font-size: 15px; padding: 4px 0; border-bottom: 2px solid transparent; }
.site-nav a:hover, .site-nav a.cur { color: var(--text); border-color: var(--accent); }
.open-app { background: var(--accent); color: #fff; text-decoration: none; padding: 7px 16px; border-radius: 7px; font-weight: 600; font-size: 14px; }
.doc { max-width: 780px; margin: 0 auto; padding: 40px 24px 64px; }
h1 { font-size: 34px; line-height: 1.25; margin: 0 0 8px; letter-spacing: -.3px; }
h2 { font-size: 22px; margin: 38px 0 8px; padding-top: 6px; }
h3 { font-size: 17px; margin: 22px 0 2px; }
p, li { color: var(--text); }
.lead { font-size: 18px; color: var(--muted); margin: 6px 0 22px; }
.meta { color: var(--muted); font-size: 14px; margin: 0 0 6px; }
ul, ol { padding-left: 22px; }
li { margin: 6px 0; }
code, kbd { background: var(--code); border-radius: 4px; padding: 1px 6px; font: 14px Consolas, monospace; }
kbd { border: 1px solid var(--line); border-bottom-width: 2px; }
.callout { background: var(--soft); border-left: 4px solid var(--accent); border-radius: 6px; padding: 14px 18px; margin: 16px 0; }
.toc { display: flex; flex-wrap: wrap; gap: 6px 16px; background: var(--bar); border: 1px solid var(--line); border-radius: 10px; padding: 14px 18px; margin: 18px 0; font-size: 15px; }
.toc strong { width: 100%; }
.site-foot { border-top: 1px solid var(--line); background: var(--bar); padding: 22px 24px; text-align: center; color: var(--muted); font-size: 14px; line-height: 2; }
.site-foot a { color: var(--muted); }
.site-foot a:hover { color: var(--accent); }
@media (max-width: 600px) { h1 { font-size: 28px; } .doc { padding-top: 28px; } .site-head { padding: 10px 16px; } }

pre { background: var(--code); border-radius: 8px; padding: 14px 18px; overflow-x: auto; font: 14px/1.6 Consolas, monospace; }
.articles { list-style: none; padding: 0; }
.articles li { padding: 16px 0; border-bottom: 1px solid var(--line); margin: 0; }
.articles a { text-decoration: none; font-size: 18px; }
.articles a:hover { text-decoration: underline; }