:root {
  --bg: #ffffff; --bg2: #f5f7fa; --bg3: #eceff3; --fg: #111827; --fg2: #4b5563; --muted: #6b7280;
  --line: #e5e7eb; --accent: #2563eb; --accent-fg: #ffffff; --danger: #dc2626; --ok: #059669; --warn: #d97706;
  --radius: 10px; --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) {
  --bg: #0f1115; --bg2: #161a21; --bg3: #1f2530; --fg: #e5e7eb; --fg2: #c3c8d1; --muted: #8b93a1;
  --line: #2a3140; --accent: #3b82f6; --accent-fg: #ffffff; --danger: #f87171; --ok: #34d399; --warn: #fbbf24;
} }
:root[data-theme="dark"] {
  --bg: #0f1115; --bg2: #161a21; --bg3: #1f2530; --fg: #e5e7eb; --fg2: #c3c8d1; --muted: #8b93a1;
  --line: #2a3140; --accent: #3b82f6; --accent-fg: #ffffff; --danger: #f87171; --ok: #34d399; --warn: #fbbf24;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body { background: var(--bg); color: var(--fg); font-family: var(--font); line-height: 1.55; min-height: 100vh; display: flex; flex-direction: column; }
a { color: var(--accent); text-decoration: none; } a:hover { text-decoration: underline; }
code, pre { font-family: var(--mono); font-size: 0.92em; }
pre { background: var(--bg2); border: 1px solid var(--line); border-radius: var(--radius); padding: 12px 14px; overflow-x: auto; }
code:not(pre code) { background: var(--bg3); padding: 1px 5px; border-radius: 5px; }
button, .btn { font: inherit; cursor: pointer; border: 1px solid var(--line); background: var(--bg2); color: var(--fg); padding: 7px 13px; border-radius: 8px; }
button:hover, .btn:hover { background: var(--bg3); text-decoration: none; }
.btn.primary, button.primary { background: var(--accent); color: var(--accent-fg); border-color: var(--accent); }
.btn.ghost { background: transparent; }
button.danger { color: var(--danger); }
button:disabled { opacity: 0.5; cursor: default; }
input, textarea, select { font: inherit; color: var(--fg); background: var(--bg); border: 1px solid var(--line); border-radius: 8px; padding: 8px 10px; width: 100%; }
textarea { resize: vertical; }
label { display: block; font-size: 0.9em; color: var(--fg2); margin: 10px 0 4px; }
.muted { color: var(--muted); }
.top { display: flex; align-items: center; justify-content: space-between; padding: 10px 16px; border-bottom: 1px solid var(--line); background: var(--bg); position: sticky; top: 0; z-index: 5; }
.top nav { display: flex; gap: 14px; align-items: center; }
.brand { color: var(--fg); font-weight: 600; display: flex; align-items: center; gap: 8px; }
.logo { background: var(--accent); color: var(--accent-fg); border-radius: 7px; padding: 1px 6px; font-size: 0.8em; font-weight: 700; }
.theme-toggle { padding: 3px 8px; }
.container { width: 100%; max-width: 980px; margin: 0 auto; padding: 24px 16px; flex: 1; }
.site-footer { border-top: 1px solid var(--line); padding: 14px 16px; display: flex; gap: 8px; flex-wrap: wrap; justify-content: center; color: var(--muted); font-size: 0.9em; }
.hero { padding: 40px 0 24px; } .hero h1 { font-size: 2.2rem; line-height: 1.15; margin: 0 0 12px; }
.lead { font-size: 1.1em; color: var(--fg2); max-width: 70ch; }
.cta { display: flex; gap: 10px; flex-wrap: wrap; }
.grid3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; }
.grid3 article { background: var(--bg2); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; }
.grid3 h2 { font-size: 1.05em; margin: 0 0 8px; }
.grid3 pre { font-size: 0.8em; white-space: pre-wrap; word-break: break-all; }

/* public pages */
.public.with-sidebar { display: grid; grid-template-columns: 240px 1fr; gap: 28px; max-width: 1100px; }
.sidebar { font-size: 0.93em; }
.tree { list-style: none; padding-left: 14px; margin: 4px 0; } .tree > li { margin: 3px 0; }
.sidebar .tree { padding-left: 0; } .sidebar .tree .tree { padding-left: 14px; }
.tree li.current > a { font-weight: 600; }
.tree .summary { display: block; color: var(--muted); font-size: 0.9em; }
.crumbs { color: var(--muted); font-size: 0.9em; margin: 0 0 6px; }
.doc h1 { margin: 0 0 8px; font-size: 2rem; line-height: 1.2; }
.meta { color: var(--muted); font-size: 0.9em; margin-bottom: 20px; }
.tag { display: inline-block; background: var(--bg3); border-radius: 999px; padding: 1px 9px; font-size: 0.85em; margin-right: 4px; }
.prose img { max-width: 100%; } .prose table { border-collapse: collapse; } .prose th, .prose td { border: 1px solid var(--line); padding: 6px 10px; }
.prose blockquote { border-left: 3px solid var(--line); margin: 0; padding-left: 14px; color: var(--fg2); }
@media (max-width: 760px) { .public.with-sidebar { grid-template-columns: 1fr; } .sidebar { order: 2; border-top: 1px solid var(--line); padding-top: 12px; } }

/* editor */
.app-body main { flex: 1; } .app-main { display: flex; flex-direction: column; }
#app { flex: 1; display: flex; flex-direction: column; }
.auth { max-width: 380px; margin: 60px auto; padding: 0 16px; } .auth h1 { font-size: 1.5rem; }
.auth .error { color: var(--danger); margin: 8px 0; }
.shell { display: grid; grid-template-columns: 280px 1fr; min-height: calc(100vh - 110px); }
.side { border-right: 1px solid var(--line); background: var(--bg2); padding: 12px; overflow-y: auto; }
.side .row { display: flex; gap: 6px; align-items: center; margin-bottom: 8px; }
.side select { flex: 1; }
.side .mini { padding: 4px 8px; font-size: 0.85em; }
.ptree { list-style: none; padding: 0; margin: 8px 0; font-size: 0.93em; } .ptree ul { list-style: none; padding-left: 14px; margin: 0; }
.ptree li > .n { display: flex; align-items: center; gap: 5px; padding: 3px 6px; border-radius: 6px; cursor: pointer; }
.ptree li > .n:hover { background: var(--bg3); } .ptree li > .n.sel { background: var(--accent); color: var(--accent-fg); }
.ptree .k { opacity: 0.7; font-size: 0.85em; width: 14px; text-align: center; }
.ptree .pub { margin-left: auto; font-size: 0.75em; opacity: 0.8; }
.side nav.views { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 14px; border-top: 1px solid var(--line); padding-top: 10px; }
.side nav.views a { font-size: 0.9em; }
.pane { padding: 16px 20px; min-width: 0; }
.editor .bar { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; margin-bottom: 10px; }
.editor .bar input[type=text] { flex: 1; min-width: 200px; font-size: 1.1em; font-weight: 600; }
.editor textarea { min-height: 60vh; font-family: var(--mono); font-size: 0.95em; line-height: 1.5; }
.editor .split { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.editor .preview { border: 1px solid var(--line); border-radius: var(--radius); padding: 12px 16px; overflow: auto; max-height: 70vh; }
.status { color: var(--muted); font-size: 0.88em; margin: 8px 0; display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.status .ok { color: var(--ok); } .status .warn { color: var(--warn); } .status .bad { color: var(--danger); }
.toast { position: fixed; bottom: 18px; left: 50%; transform: translateX(-50%); background: var(--fg); color: var(--bg); padding: 9px 16px; border-radius: 999px; font-size: 0.9em; z-index: 10; max-width: 90vw; }
.toast.bad { background: var(--danger); color: #fff; }
.card { background: var(--bg2); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; margin-bottom: 14px; }
table.list { width: 100%; border-collapse: collapse; font-size: 0.93em; } table.list th, table.list td { text-align: left; padding: 6px 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
.results li { margin: 6px 0; } .results .score { color: var(--muted); font-size: 0.85em; }
.keyshow { font-family: var(--mono); background: var(--bg3); padding: 8px 10px; border-radius: 8px; word-break: break-all; }
.empty { color: var(--muted); padding: 40px 0; text-align: center; }
@media (max-width: 820px) { .shell { grid-template-columns: 1fr; } .side { border-right: 0; border-bottom: 1px solid var(--line); max-height: 40vh; } .editor .split { grid-template-columns: 1fr; } }