:root {
  color-scheme: light;
  --bg: #fafafa;
  --card: #ffffff;
  --text: #202124;
  --muted: #74777d;
  --line: #e9e9e9;
  --accent: #5569e8;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-width: 320px;
  color: var(--text);
  background: var(--bg);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
}

.layout { display: grid; grid-template-columns: 240px minmax(0, 1fr); min-height: 100vh; }

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  padding: 34px 20px;
  border-right: 1px solid var(--line);
  background: var(--card);
}

.brand {
  display: block;
  margin: 0 10px 28px;
  color: var(--text);
  font-size: 22px;
  font-weight: 760;
  letter-spacing: -.03em;
  text-decoration: none;
}

.documents { display: grid; gap: 3px; }

.document {
  width: 100%;
  padding: 9px 10px;
  border: 0;
  border-radius: 8px;
  color: var(--muted);
  background: transparent;
  cursor: pointer;
  font: inherit;
  font-size: 14px;
  text-align: left;
}

.document:hover, .document[aria-current="page"] { color: var(--accent); background: #f0f2ff; }
.document-name, .document small { display: block; }
.document small { margin-top: 2px; color: #9a9da4; font-size: 11px; line-height: 1.35; overflow-wrap: anywhere; }

.reader { min-width: 0; padding: 68px clamp(24px, 8vw, 120px); }
.content { width: min(100%, 860px); margin: 0 auto; font-size: 16px; line-height: 1.85; overflow-wrap: anywhere; }
.loading { color: var(--muted); }

.content h1, .content h2, .content h3, .content h4, .content h5, .content h6 { color: #17181a; line-height: 1.35; }
.content h1 { margin: 0 0 36px; font-size: clamp(28px, 4vw, 38px); letter-spacing: -.04em; }
.content h2 { margin: 48px 0 16px; font-size: 24px; }
.content h3 { margin: 34px 0 12px; font-size: 19px; }
.content h4, .content h5, .content h6 { margin: 25px 0 10px; font-size: 16px; }
.content p { margin: 0 0 18px; }
.content ul, .content ol { margin: 0 0 18px; padding-left: 1.5em; }
.content li + li { margin-top: 5px; }
.content blockquote { margin: 0 0 24px; padding: 10px 16px; border-left: 3px solid #aeb9ff; color: #575b65; background: #f7f8ff; }
.content pre { margin: 0 0 22px; padding: 16px; overflow: auto; border-radius: 10px; background: #f4f5f7; font: 13px/1.65 "SFMono-Regular", Consolas, monospace; }
.content :not(pre) > code { padding: 2px 5px; border-radius: 4px; background: #f1f2f4; font: .88em "SFMono-Regular", Consolas, monospace; }
.content table { display: block; width: 100%; margin: 0 0 22px; overflow-x: auto; border-collapse: collapse; }
.content th, .content td { min-width: 110px; padding: 9px 12px; border: 1px solid var(--line); text-align: left; vertical-align: top; }
.content th { background: #f5f6f8; }
.content a { color: var(--accent); }
.content hr { margin: 32px 0; border: 0; border-top: 1px solid var(--line); }
.mobile-top { display: none; }

@media (max-width: 720px) {
  .layout { display: block; }
  .sidebar { display: none; }
  .reader { padding: 20px 20px 48px; }
  .mobile-top { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 34px; }
  .mobile-top .brand { margin: 0; }
  .mobile-top select { min-width: 0; max-width: 62%; padding: 8px; border: 1px solid var(--line); border-radius: 7px; color: var(--text); background: #fff; font: inherit; font-size: 14px; }
  .content h1 { margin-bottom: 28px; }
  .content h2 { margin-top: 38px; }
}