:root {
  --fg: #1f2328;
  --muted: #636c76;
  --bg: #ffffff;
  --bg-soft: #f6f8fa;
  --border: #d0d7de;
  --primary: #2563eb;
  --primary-d: #1d4ed8;
  --danger: #dc2626;
  --radius: 6px;
}
* { box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--fg);
  background: var(--bg);
  margin: 0;
  line-height: 1.6;
}
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
code { font-family: "SF Mono", Menlo, Consolas, monospace; background: var(--bg-soft); padding: 1px 5px; border-radius: 3px; }
pre { background: var(--bg-soft); padding: 12px; border-radius: var(--radius); overflow-x: auto; }
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 24px; border-bottom: 1px solid var(--border); background: var(--bg);
  position: sticky; top: 0; z-index: 10;
}
.brand { font-weight: 700; font-size: 16px; color: var(--fg); }
.topbar nav { display: flex; gap: 8px; align-items: center; }
.container { max-width: 1280px; margin: 0 auto; padding: 24px; }
.btn {
  border: 1px solid var(--border); background: var(--bg); color: var(--fg);
  padding: 6px 14px; border-radius: var(--radius); cursor: pointer; font-size: 14px;
}
.btn:hover { background: var(--bg-soft); }
.btn-primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-d); }
.btn-ghost { background: transparent; color: var(--muted); }
.muted { color: var(--muted); font-size: 13px; }
.alert { padding: 10px 14px; border-radius: var(--radius); background: #fef3c7; border: 1px solid #fcd34d; margin-bottom: 12px; }
.alert-error { background: #fee2e2; border-color: #fecaca; color: #991b1b; }
.badge { display: inline-block; padding: 2px 8px; border-radius: 10px; background: var(--bg-soft); border: 1px solid var(--border); font-size: 12px; color: var(--muted); }
.badge-danger { background: #fee2e2; color: #991b1b; border-color: #fecaca; }
.search { display: flex; gap: 6px; }
.search input { padding: 6px 10px; border: 1px solid var(--border); border-radius: var(--radius); width: 240px; }

label { display: block; margin: 10px 0; }
input { padding: 7px 10px; border: 1px solid var(--border); border-radius: var(--radius); width: 100%; }
.login-card input { font-size: 15px; }

/* tree */
.tree, .tree ul { list-style: none; padding-left: 18px; }
.tree > li { margin: 4px 0; }
.tree summary { cursor: pointer; user-select: none; }

/* doc view grid */
.grid { display: grid; grid-template-columns: 1fr 360px; gap: 24px; }
@media (max-width: 900px) { .grid { grid-template-columns: 1fr; } }
.card { border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; background: var(--bg); margin-bottom: 16px; }
.card h3 { margin-top: 0; }
.share-row { padding: 10px 0; border-bottom: 1px dashed var(--border); }
.share-row.revoked { opacity: 0.5; }
.share-head { display: flex; align-items: center; gap: 8px; }
.share-meta { font-size: 12px; color: var(--muted); margin: 4px 0; }
.share-actions { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.share-actions label { margin: 0; }
.share-actions input { width: 80px; padding: 4px 6px; }
.code { letter-spacing: 2px; font-size: 15px; font-weight: 700; }

.log-table { width: 100%; border-collapse: collapse; font-size: 12px; }
.log-table th, .log-table td { text-align: left; padding: 4px 6px; border-bottom: 1px solid var(--border); }
.log-table .ua { color: var(--muted); max-width: 320px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* markdown body */
.markdown-body { line-height: 1.7; font-size: 15px; }
.markdown-body h1, .markdown-body h2, .markdown-body h3 { border-bottom: 1px solid var(--border); padding-bottom: 6px; margin-top: 28px; }
.markdown-body table { border-collapse: collapse; }
.markdown-body th, .markdown-body td { border: 1px solid var(--border); padding: 6px 10px; }
.markdown-body blockquote { color: var(--muted); border-left: 4px solid var(--border); padding-left: 12px; margin: 0; }
.markdown-body img { max-width: 100%; }
.markdown-body .mermaid { text-align: center; margin: 16px 0; }
.markdown-body task-list-item { list-style: none; }