:root{
  --bg:#0d1117; --panel:#161b22; --panel2:#1c222b; --border:#30363d; --border2:#3d444d;
  --txt:#e6edf3; --muted:#8b949e; --dim:#6e7681;
  --cyan:#58a6ff; --green:#3fb950; --amber:#d29922; --red:#f85149;
  --mono:ui-monospace,SFMono-Regular,'SF Mono',Menlo,Consolas,monospace;
}
*{box-sizing:border-box}
html,body{margin:0}
body{background:var(--bg);color:var(--txt);font:15px/1.5 -apple-system,BlinkMacSystemFont,'Segoe UI',system-ui,sans-serif;padding-bottom:env(safe-area-inset-bottom)}
a{color:var(--cyan)}
button{font:inherit;cursor:pointer}
input,textarea,select{background:var(--panel);color:var(--txt);border:1px solid var(--border);border-radius:8px;padding:8px 10px;font:inherit;font-size:14px}
.hidden{display:none !important}
.muted{color:var(--muted)}
.btn{border:1px solid var(--border);background:var(--panel2);color:var(--txt);border-radius:8px;padding:7px 13px;font-size:14px;white-space:nowrap;text-decoration:none;display:inline-block}
.btn:hover{border-color:var(--border2)}
.btn.primary{background:#238636;border-color:#2ea043;color:#fff}
.btn.danger{color:var(--red)}
.err{color:var(--red);font-size:13px;margin-right:auto}

.gate{max-width:440px;margin:12vh auto;padding:28px;background:var(--panel);border:1px solid var(--border);border-radius:14px;text-align:center}
.gate h1{font-size:20px;margin:0 0 8px}

.layout{display:grid;grid-template-columns:300px 1fr;min-height:calc(100vh - 52px)}
.side{border-right:1px solid var(--border);background:#0f141a;padding:12px;position:sticky;top:0;align-self:start;max-height:calc(100vh - 52px);overflow-y:auto}
.side-head{display:flex;gap:8px;margin-bottom:12px}
.side-head input{flex:1;min-width:0}
.tree .cat{font-size:11.5px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);margin:16px 6px 6px}
.tree .cat:first-child{margin-top:4px}
.tree a{display:flex;gap:7px;align-items:baseline;padding:6px 8px;border-radius:7px;color:var(--txt);text-decoration:none;font-size:14px}
.tree a:hover{background:var(--panel)}
.tree a.on{background:var(--panel2);box-shadow:inset 2px 0 0 var(--cyan)}
.tree a .ic{width:18px;flex:none;text-align:center}
.tree .kids{margin-left:16px;border-left:1px solid var(--border);padding-left:4px}
.tree .none{color:var(--muted);font-size:14px;padding:8px}

.main{padding:22px 34px 80px;min-width:0}
.doc{max-width:820px}
.crumbs{font-size:13px;color:var(--muted);margin-bottom:6px}
.crumbs a{color:var(--muted)}
.doc-head{display:flex;gap:12px;align-items:flex-start;flex-wrap:wrap}
.doc-head h1{font-size:28px;line-height:1.2;margin:0;flex:1;min-width:240px}
.doc-actions{display:flex;gap:8px;flex-wrap:wrap}
.meta{color:var(--muted);font-size:13px;margin:8px 0 22px}
.back{display:none}

.md{font-size:15.5px;line-height:1.65;overflow-wrap:anywhere}
.md h1,.md h2,.md h3{line-height:1.25;margin:1.6em 0 .5em}
.md h1{font-size:23px} .md h2{font-size:19px} .md h3{font-size:16.5px}
.md p{margin:.55em 0}
.md ul,.md ol{padding-left:1.5em;margin:.4em 0}
.md li{margin:.2em 0}
.md li > input[type=checkbox]{margin-right:6px;vertical-align:-1px}
.md img{max-width:100%;border-radius:8px;border:1px solid var(--border)}
.md blockquote{margin:.8em 0;padding:.3em 1em;border-left:3px solid var(--border2);color:#c9d1d9}
.md code{font-family:var(--mono);font-size:13px;background:var(--panel2);padding:1px 5px;border-radius:5px}
.md pre{background:#0b0f14;border:1px solid var(--border);border-radius:8px;padding:12px;overflow:auto}
.md pre code{background:none;padding:0}
.md hr{border:0;border-top:1px solid var(--border);margin:1.6em 0}
.md table{border-collapse:collapse;display:block;overflow-x:auto;max-width:100%;margin:.8em 0}
.md th,.md td{border:1px solid var(--border);padding:6px 10px;text-align:left;vertical-align:top}
.md th{background:var(--panel)}
.md details{border:1px solid var(--border);border-radius:8px;padding:6px 12px;margin:.5em 0;background:#0f141a}
.md summary{cursor:pointer;font-weight:600}
.md .callout{display:flex;gap:10px;background:var(--panel);border:1px solid var(--border);border-radius:8px;padding:10px 14px;margin:.8em 0}
.md .callout > p:first-child{margin-top:0}
.subpages{margin-top:28px;border-top:1px solid var(--border);padding-top:14px}
.subpages h3{font-size:13px;color:var(--muted);text-transform:uppercase;letter-spacing:.05em;margin:0 0 8px}
.subpages a{display:block;padding:5px 0}

.home h1{font-size:24px;margin:0 0 6px}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:10px;margin-top:18px}
.card{display:block;background:var(--panel);border:1px solid var(--border);border-radius:12px;padding:12px 14px;color:var(--txt);text-decoration:none}
.card:hover{border-color:var(--border2)}
.card .t{font-weight:600}
.card .c{color:var(--muted);font-size:12.5px;margin-top:3px}

.editor .row{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:10px}
.editor .row input{flex:1;min-width:200px}
.editor .title-in{font-size:20px;font-weight:600;width:100%}
.split{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.split textarea{width:100%;min-height:62vh;font:13.5px/1.55 var(--mono);resize:vertical}
.split .preview{border:1px solid var(--border);border-radius:8px;padding:6px 16px;min-height:62vh;overflow:auto;background:#0f141a}
.toolbar{display:flex;gap:8px;align-items:center;margin-bottom:8px;flex-wrap:wrap}
.hint{color:var(--muted);font-size:12.5px}

.modal{position:fixed;inset:0;background:rgba(1,4,9,.7);display:flex;align-items:center;justify-content:center;z-index:100;padding:16px}
.modal-card{background:var(--panel);border:1px solid var(--border);border-radius:14px;width:min(560px,100%);max-height:88vh;display:flex;flex-direction:column}
.modal-head{display:flex;align-items:center;padding:14px 18px;border-bottom:1px solid var(--border)}
.modal-head h2{font-size:17px;margin:0;flex:1}
.x{background:none;border:0;color:var(--muted);font-size:26px;line-height:1}
.modal-body{padding:14px 18px;overflow-y:auto}
.modal-foot{display:flex;gap:8px;align-items:center;padding:12px 18px;border-top:1px solid var(--border)}
.people input[type=search]{width:100%;margin-bottom:10px}
.person{display:flex;gap:10px;align-items:center;padding:7px 4px;border-bottom:1px solid #21262d}
.person:last-child{border-bottom:0}
.person .n{flex:1;min-width:0}
.person .n small{display:block;color:var(--muted);font-size:12px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.person .tag{font-size:12px;color:var(--green);white-space:nowrap}
.person input{width:18px;height:18px}

@media (max-width:820px){
  .layout{grid-template-columns:1fr}
  .side{position:static;max-height:none;border-right:0}
  .main{padding:16px 16px 60px}
  .layout.reading .side{display:none}
  .layout:not(.reading) .main{display:none}
  .back{display:inline-block;margin-bottom:10px}
  .split{grid-template-columns:1fr}
  .split .preview{min-height:30vh}
  .doc-head h1{font-size:23px}
}