:root{
  --bg:#fbfaf8; --panel:#ffffff; --ink:#1f2328; --ink-soft:#5b636d; --ink-faint:#8a929c;
  --line:#e9e6e0; --line-strong:#ddd8cf; --sunk:#f7f5f0;
  --accent:#3b5bdb; --agent:#0d9488; --comment:#f0a500; --pr:#7048e8;
  --add:#e6f4ea; --add-ink:#1a7f37; --del:#fce8e6; --del-ink:#b42318;
  --radius:12px; --shadow:0 1px 2px rgba(20,20,20,.05),0 8px 28px rgba(20,20,20,.06);
  --serif:"Iowan Old Style","Palatino Linotype",Palatino,"Book Antiqua",Georgia,serif;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Inter,Roboto,Helvetica,Arial,sans-serif;
  --mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,monospace;
}
*{box-sizing:border-box}
html,body{margin:0;height:100%}
body{background:var(--bg);color:var(--ink);font-family:var(--sans);-webkit-font-smoothing:antialiased;overflow:hidden}
button{font-family:inherit;cursor:pointer}
a{color:var(--accent)}
::selection{background:#dfe4ff}
.scroll{overflow-y:auto;overflow-x:hidden}
.scroll::-webkit-scrollbar{width:9px;height:9px}
.scroll::-webkit-scrollbar-thumb{background:#e0dcd3;border-radius:9px;border:2px solid transparent;background-clip:content-box}
.hide{display:none !important}

/* ---------------- shell ---------------- */
#shell{display:grid;grid-template-columns:248px 1fr 340px;height:100vh}
#shell.no-comments{grid-template-columns:248px 1fr 0}
#shell.no-nav{grid-template-columns:0 1fr 340px}
#shell.no-nav.no-comments{grid-template-columns:0 1fr 0}

/* ---------------- left rail ---------------- */
#nav{background:var(--sunk);border-right:1px solid var(--line);display:flex;flex-direction:column;height:100vh;overflow:hidden}
#nav .pad{padding:14px 12px 0}
.brand{display:flex;align-items:center;gap:8px;font-weight:700;letter-spacing:-.02em;padding:2px 4px 12px;font-size:15px}
.brand .dot{width:22px;height:22px;border-radius:7px;background:linear-gradient(135deg,var(--accent),var(--pr));box-shadow:inset 0 0 0 1px rgba(255,255,255,.25)}
.brand .v{font-size:10px;font-weight:700;color:var(--ink-faint);border:1px solid var(--line-strong);border-radius:5px;padding:0 4px;letter-spacing:.04em}
.search{display:flex;align-items:center;gap:7px;background:#fff;border:1px solid var(--line);border-radius:9px;padding:6px 9px;color:var(--ink-faint);font-size:13px}
.search input{border:0;background:transparent;outline:none;font:inherit;color:var(--ink);width:100%}
.navlbl{font-size:11px;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--ink-faint);margin:16px 8px 6px;display:flex;align-items:center}
.navlbl button{margin-left:auto;background:none;border:0;color:var(--ink-faint);font-size:15px;line-height:1;padding:0 3px;border-radius:5px}
.navlbl button:hover{background:#eceae4;color:var(--ink)}
#doclist{padding:0 12px 14px;flex:1}
.navitem{display:flex;align-items:center;gap:9px;padding:7px 8px;border-radius:8px;font-size:13.5px;color:var(--ink-soft);cursor:pointer;position:relative}
.navitem:hover{background:#eceae4;color:var(--ink)}
.navitem.active{background:#eef1ff;color:var(--accent);font-weight:600}
.navitem .ic{flex:none;opacity:.8}
.navitem .t{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.navitem .cbadge{flex:none;font-size:10.5px;font-weight:700;background:#fff4d6;color:#8a6100;border:1px solid #f3e2b4;border-radius:999px;padding:0 6px}
.navempty{font-size:12.5px;color:var(--ink-faint);padding:6px 8px;line-height:1.5}
#navfoot{border-top:1px solid var(--line);padding:10px 14px;font-size:12px;color:var(--ink-faint);display:flex;align-items:center;gap:8px}
#navfoot .me{display:flex;align-items:center;gap:7px;cursor:pointer;border-radius:7px;padding:3px 5px;margin:-3px -5px}
#navfoot .me:hover{background:#eceae4;color:var(--ink)}

/* ---------------- main ---------------- */
#main{display:flex;flex-direction:column;height:100vh;min-width:0;background:var(--bg)}
#bar{display:flex;align-items:center;gap:10px;padding:9px 14px;background:var(--panel);border-bottom:1px solid var(--line);flex:none}
#bar .title{font-weight:700;font-size:14px;letter-spacing:-.01em;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:38ch}
#bar .path{font:11.5px var(--mono);color:var(--ink-faint);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
#bar .sp{flex:1}
.tbtn{background:#fff;border:1px solid var(--line);border-radius:8px;padding:5px 10px;font-size:12.5px;color:var(--ink-soft);display:inline-flex;align-items:center;gap:6px}
.tbtn:hover{background:var(--sunk);color:var(--ink)}
.tbtn.on{background:#eef1ff;border-color:#ccd6ff;color:var(--accent);font-weight:600}
.seg{display:inline-flex;background:var(--sunk);border:1px solid var(--line);border-radius:9px;padding:2px;gap:2px}
.seg button{background:transparent;border:0;border-radius:7px;padding:4px 10px;font-size:12.5px;color:var(--ink-faint)}
.seg button:hover{color:var(--ink)}
.seg button.on{background:#fff;color:var(--ink);font-weight:600;box-shadow:0 1px 2px rgba(0,0,0,.06)}
#status{font-size:12px;color:var(--ink-faint);min-width:76px;display:flex;align-items:center;gap:6px}
#status .dt{width:6px;height:6px;border-radius:50%;background:var(--add-ink)}
#status.dirty .dt{background:var(--comment)}
#status.err .dt{background:var(--del-ink)}
.presence{display:flex;align-items:center}
.presence .avatar{margin-left:-6px}
.avatar{width:25px;height:25px;border-radius:50%;display:grid;place-items:center;color:#fff;font-size:10.5px;font-weight:700;box-shadow:0 0 0 2px var(--panel);flex:none}

#banner{display:flex;align-items:center;gap:10px;padding:8px 14px;font-size:13px;background:#fff7e6;border-bottom:1px solid #fbe3b0;color:#7a5210;flex:none}
#banner button{margin-left:auto}

#split{flex:1;display:grid;grid-template-columns:1fr 1fr;min-height:0}
#split.editor-only{grid-template-columns:1fr 0}
#split.preview-only{grid-template-columns:0 1fr}
.pane{min-height:0;min-width:0;display:flex;flex-direction:column;overflow:hidden}
.pane + .pane{border-left:1px solid var(--line)}
.paneh{padding:6px 16px;font-size:10.5px;font-weight:700;letter-spacing:.05em;text-transform:uppercase;color:var(--ink-faint);background:#faf9f6;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:8px;flex:none}
/* CodeMirror host — the editor owns its own scrolling and padding. */
#src{flex:1;min-height:0;overflow:hidden;background:#fcfbf9}
#src .cm-editor{height:100%}
.linkish{background:none;border:0;font:inherit;color:var(--ink-faint);padding:0;text-transform:none;letter-spacing:0;font-weight:600}
.linkish:hover{color:var(--accent)}
#multihint{font-size:10.5px;font-weight:700;color:var(--accent);background:#eef1ff;border:1px solid #ccd6ff;border-radius:999px;padding:1px 8px;letter-spacing:0;text-transform:none}
#keysmodal{position:fixed;inset:0;background:rgba(30,28,25,.35);backdrop-filter:blur(3px);display:grid;place-items:center;z-index:110}
#keysmodal .card{background:#fff;border-radius:16px;padding:22px 24px;width:420px;box-shadow:0 24px 60px rgba(0,0,0,.25)}
#keysmodal h2{font-family:var(--serif);font-size:20px;margin:0 0 12px}
table.keys{width:100%;border-collapse:collapse;font-size:13px}
table.keys td{padding:5px 0;vertical-align:middle;color:var(--ink-soft)}
table.keys td:first-child{width:150px;white-space:nowrap}
kbd{font:11px var(--mono);border:1px solid var(--line-strong);border-bottom-width:2px;border-radius:5px;padding:1px 5px;background:#faf9f6;color:var(--ink);margin-right:2px}
#keysmodal .go{width:100%;margin-top:16px;background:var(--accent);color:#fff;border:0;border-radius:9px;padding:9px;font-size:14px;font-weight:600}
#previewwrap{flex:1;padding:26px 30px 40vh}
#preview{max-width:760px;margin:0 auto}

/* ---------------- rendered markdown ---------------- */
#preview h1{font-family:var(--serif);font-size:30px;line-height:1.18;margin:0 0 10px;letter-spacing:-.01em}
#preview h2{font-family:var(--serif);font-size:21px;margin:30px 0 8px;letter-spacing:-.01em;padding-bottom:5px;border-bottom:1px solid var(--line)}
#preview h3{font-family:var(--serif);font-size:17px;margin:22px 0 6px}
#preview p,#preview li{font-size:15.5px;line-height:1.72;color:#2b3138}
#preview ul,#preview ol{padding-left:22px;margin:8px 0}
#preview li{margin:4px 0}
#preview li>p{margin:2px 0}
#preview code{font:12.8px var(--mono);background:#f2f0eb;padding:1.5px 5px;border-radius:5px;border:1px solid var(--line)}
#preview pre{background:#f7f5f0;border:1px solid var(--line);border-radius:10px;padding:13px 15px;overflow-x:auto}
#preview pre code{background:none;border:0;padding:0;font-size:12.5px;line-height:1.6}
#preview blockquote{margin:12px 0;padding:2px 0 2px 15px;border-left:3px solid var(--line-strong);color:var(--ink-soft)}
#preview table{border-collapse:collapse;width:100%;margin:14px 0;font-size:14px;display:block;overflow-x:auto}
#preview th,#preview td{border:1px solid var(--line-strong);padding:7px 11px;text-align:left;vertical-align:top}
#preview th{background:var(--sunk);font-weight:700}
#preview tr:nth-child(even) td{background:#fdfcfa}
#preview hr{border:0;border-top:1px solid var(--line);margin:26px 0}
#preview img{max-width:100%}
.mermaid-block{margin:16px 0;padding:14px;background:#fff;border:1px solid var(--line);border-radius:12px;overflow-x:auto;text-align:center}
/* Natural size, not clamped — the wrapper scrolls when a diagram is wider than
   the pane. Clamping to 100% shrank text to nothing in the split view. */
.mermaid-block svg{max-width:none}
.mermaid-block.failed{background:#fdf3f2;border-color:#f3d3cf;text-align:left}
.mermaid-block.failed pre{background:none;border:0;padding:0;color:var(--del-ink);font-size:12px;white-space:pre-wrap}

/* comment anchors inside the preview */
.cmark{background:#fff4d6;border-bottom:2px solid var(--comment);border-radius:2px;cursor:pointer;padding:0 1px}
.cmark:hover{background:#ffeab0}
.cmark.active{background:#ffe08a;box-shadow:0 0 0 2px rgba(240,165,0,.3)}
.cmark.pending{background:#e5ecff;border-bottom-color:var(--accent)}

/* selection → comment bubble */
#bubble{position:absolute;z-index:70;background:#211f1c;color:#fff;border:0;border-radius:9px;padding:6px 11px;font-size:12.5px;font-weight:600;box-shadow:0 8px 24px rgba(0,0,0,.25);display:flex;align-items:center;gap:6px}
#bubble:hover{background:#332f2a}

/* ---------------- comments rail ---------------- */
#rail{background:var(--sunk);border-left:1px solid var(--line);display:flex;flex-direction:column;height:100vh;overflow:hidden}
#railh{padding:12px 14px;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:8px;flex:none}
#railh .h{font-weight:700;font-size:13.5px}
#railh .n{font-size:12px;color:var(--ink-faint)}
#threads{padding:12px;display:flex;flex-direction:column;gap:10px;flex:1}
.thread{border:1px solid var(--line);border-radius:11px;background:var(--panel);padding:10px 11px;box-shadow:var(--shadow);cursor:pointer}
.thread.active{border-color:#f3d089;box-shadow:0 0 0 2px rgba(240,165,0,.18),var(--shadow)}
.thread.orphan{opacity:.75}
.thread .anchor{font-size:12px;color:#8a6100;font-weight:600;border-left:2px solid var(--comment);padding-left:8px;margin-bottom:8px;line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.thread.orphan .anchor{color:var(--ink-faint);border-left-color:var(--line-strong);text-decoration:line-through}
.crow{display:flex;gap:8px;margin:8px 0}
.crow .avatar{width:23px;height:23px}
.cbody{min-width:0;flex:1}
.cbody .who{font-size:12.5px;font-weight:600}
.cbody .who .when{font-size:11px;color:var(--ink-faint);margin-left:6px;font-weight:400}
.cbody .ctext{font-size:13px;line-height:1.5;color:#333b43;margin-top:1px;white-space:pre-wrap;word-wrap:break-word}
.cfoot{display:flex;gap:7px;margin-top:8px;align-items:center}
.cfoot input{flex:1;min-width:0;border:1px solid var(--line);border-radius:8px;padding:6px 9px;font:12.5px var(--sans);outline:none;background:#fff}
.cfoot input:focus{border-color:var(--accent)}
.mini{font-size:11.5px;color:var(--ink-faint);border:1px solid var(--line);background:#fff;border-radius:7px;padding:4px 8px;white-space:nowrap}
.mini:hover{color:var(--add-ink);border-color:#c6ecd3;background:#f4fbf6}
.mini.danger:hover{color:var(--del-ink);border-color:#f3d3cf;background:#fdf3f2}
#composer{border:1px solid #ccd6ff;border-radius:11px;background:#fff;padding:10px 11px;box-shadow:0 0 0 2px rgba(59,91,219,.1),var(--shadow)}
#composer textarea{width:100%;border:1px solid var(--line);border-radius:8px;padding:7px 9px;font:13px var(--sans);outline:none;resize:vertical;min-height:60px}
#composer textarea:focus{border-color:var(--accent)}
#composer .go{background:var(--accent);color:#fff;border:1px solid var(--accent);font-weight:600}
#composer .go:hover{background:#3450c9;color:#fff}
.railempty{font-size:12.5px;color:var(--ink-faint);line-height:1.6;padding:10px 4px}
#resolvedwrap{border-top:1px solid var(--line);padding:10px 12px}
#resolvedtoggle{font-size:12px;color:var(--ink-faint);background:none;border:0;padding:2px}
#resolvedtoggle:hover{color:var(--ink)}

/* ---------------- modal ---------------- */
#modal{position:fixed;inset:0;background:rgba(30,28,25,.35);backdrop-filter:blur(3px);display:grid;place-items:center;z-index:100}
#modal .card{background:#fff;border-radius:16px;padding:22px 24px;width:340px;box-shadow:0 24px 60px rgba(0,0,0,.25)}
#modal h2{font-family:var(--serif);font-size:20px;margin:0 0 4px}
#modal p{font-size:13px;color:var(--ink-soft);margin:0 0 14px;line-height:1.5}
#modal input{width:100%;border:1px solid var(--line-strong);border-radius:9px;padding:9px 11px;font:14px var(--sans);outline:none}
#modal input:focus{border-color:var(--accent)}
#modal .go{width:100%;margin-top:12px;background:var(--accent);color:#fff;border:0;border-radius:9px;padding:9px;font-size:14px;font-weight:600}
#toast{position:fixed;bottom:20px;left:50%;transform:translateX(-50%) translateY(20px);background:#211f1c;color:#fff;font-size:13px;padding:8px 15px;border-radius:999px;box-shadow:0 10px 30px rgba(0,0,0,.28);opacity:0;transition:opacity .18s,transform .18s;pointer-events:none;z-index:120}
#toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* A guest reached one open doc by link — there's no library for them to browse.
   The nav keeps its grid slot at zero width: display:none would drop it out of
   the grid and shift main and the rail into the wrong columns. */
#shell.guest{grid-template-columns:0 1fr 340px}
#shell.guest.no-comments{grid-template-columns:0 1fr 0}
#shell.guest #nav{visibility:hidden}
#shell.guest #navbtn{display:none}

/* ---------------- copy menu ---------------- */
.menuwrap{position:relative}
.menu{position:absolute;top:calc(100% + 6px);right:0;z-index:80;background:#fff;border:1px solid var(--line-strong);border-radius:11px;box-shadow:0 14px 40px rgba(0,0,0,.16);padding:5px;min-width:290px}
.menu button{display:block;width:100%;text-align:left;background:none;border:0;border-radius:8px;padding:8px 10px}
.menu button:hover{background:var(--sunk)}
.menu button b{display:block;font-size:13px;color:var(--ink)}
.menu button span{display:block;font-size:11.5px;color:var(--ink-faint);margin-top:1px}

/* ---------------- open / private pill ---------------- */
.openpill{cursor:pointer;border-width:1px;border-style:solid;font-size:11.5px;flex:none}
.openpill.isprivate{background:#f2f0eb;color:var(--ink-soft);border-color:var(--line-strong)}
.openpill.isopen{background:#eafaf1;color:var(--add-ink);border-color:#c6ecd3}
.openpill:hover{filter:brightness(.97)}
.iconly{padding:5px 9px;display:none}
.signout{margin-left:auto;font-size:11.5px}

/* ---------------- gate / modals ---------------- */
#gate{position:fixed;inset:0;background:var(--bg);display:grid;place-items:center;z-index:200;padding:20px}
#gate .card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:30px 32px;width:min(420px,100%);box-shadow:var(--shadow);text-align:center}
#gate .brand.big{justify-content:center;font-size:19px;margin-bottom:18px}
#gate h2{font-family:var(--serif);font-size:23px;margin:0 0 6px}
#gate p{font-size:13.5px;color:var(--ink-soft);margin:0 0 20px;line-height:1.55}
#gbtn{display:flex;justify-content:center;min-height:44px}
.note{margin-top:16px;font-size:12.5px;color:#7a5210;background:#fff7e6;border:1px solid #fbe3b0;border-radius:9px;padding:9px 11px;line-height:1.5;text-align:left}
.err{margin-top:14px;font-size:12.5px;color:var(--del-ink);background:#fdf3f2;border:1px solid #f3d3cf;border-radius:9px;padding:9px 11px;line-height:1.5;text-align:left}
#copyfallback{position:fixed;inset:0;background:rgba(30,28,25,.35);backdrop-filter:blur(3px);display:grid;place-items:center;z-index:115;padding:16px}
#copyfallback .card{background:#fff;border-radius:16px;padding:22px 24px;width:min(680px,100%);box-shadow:0 24px 60px rgba(0,0,0,.25)}
#copyfallback h2{font-family:var(--serif);font-size:20px;margin:0 0 4px}
#copyfallback p{font-size:13px;color:var(--ink-soft);margin:0 0 12px}
#copyfallback textarea{width:100%;border:1px solid var(--line-strong);border-radius:10px;padding:11px 13px;font:12px/1.6 var(--mono);outline:none;resize:vertical}
#newmodal{position:fixed;inset:0;background:rgba(30,28,25,.35);backdrop-filter:blur(3px);display:grid;place-items:center;z-index:110;padding:16px}
#newmodal .card{background:#fff;border-radius:16px;padding:22px 24px;width:min(620px,100%);box-shadow:0 24px 60px rgba(0,0,0,.25)}
#newmodal h2{font-family:var(--serif);font-size:20px;margin:0 0 4px}
#newmodal p{font-size:13px;color:var(--ink-soft);margin:0 0 14px}
#newmodal textarea{width:100%;border:1px solid var(--line-strong);border-radius:10px;padding:11px 13px;font:12.5px/1.65 var(--mono);outline:none;resize:vertical}
#newmodal textarea:focus,#newmodal input:focus{border-color:var(--accent)}
#newmodal input{width:100%;border:1px solid var(--line-strong);border-radius:9px;padding:9px 11px;font:13.5px var(--sans);outline:none}
.row{display:flex;gap:9px;margin-top:10px;align-items:center}
.row.end{justify-content:flex-end}
.go.inline{width:auto;margin:0;padding:8px 18px;background:var(--accent);color:#fff;border:0;border-radius:9px;font-size:13.5px;font-weight:600}
.go.inline:disabled{opacity:.6}
.cbody .who .guesttag{font-size:10px;font-weight:700;color:var(--ink-faint);border:1px solid var(--line-strong);border-radius:4px;padding:0 4px;margin-left:5px}

/* ---------------- mobile ---------------- */
@media (max-width:1100px) and (min-width:821px){
  #shell{grid-template-columns:0 1fr 320px}
  #shell.nav-open{grid-template-columns:248px 1fr 320px}
  #split{grid-template-columns:0 1fr}
  .iconly{display:inline-flex}
}

@media (max-width:820px){
  body.narrow #shell,#shell{grid-template-columns:1fr !important}
  .iconly{display:inline-flex}
  #bar{flex-wrap:wrap;gap:7px;padding:8px 10px}
  #bar .path,#bar .presence{display:none}
  #bar .title{max-width:14ch;font-size:13px}
  .tbtn{padding:5px 8px;font-size:12px}
  .wide{display:none}
  #status{min-width:0}
  #status span:not(.dt){display:none}

  /* nav + comments become overlay drawers */
  #nav,#rail{position:fixed;top:0;bottom:0;z-index:90;width:min(300px,86vw);transition:transform .22s ease;box-shadow:0 0 40px rgba(0,0,0,.18)}
  #nav{left:0;transform:translateX(-102%)}
  #rail{right:0;transform:translateX(102%)}
  #shell.nav-open #nav{transform:none}
  #shell:not(.no-comments) #rail{transform:none}
  #main{grid-column:1/-1}
  #split{grid-template-columns:1fr !important}
  #split.editor-only .pane:last-child,#split.preview-only .pane:first-child{display:none}
  #previewwrap{padding:18px 16px 40vh}
  #preview h1{font-size:25px}
  #preview p,#preview li{font-size:15px}
  .menu{right:auto;left:0;min-width:min(300px,88vw)}
  #keysmodal .card{width:min(420px,94vw)}
}