:root{
  --bg:#12141a; --panel:#1b1e27; --panel2:#232733; --line:#2f3443; --text:#e8eaf0; --dim:#8b93a7;
  --accent:#ffb703; --good:#5ad17c; --bad:#ff5d5d;
  color-scheme: dark;
}
*{box-sizing:border-box}
html,body{margin:0;height:100%;background:var(--bg);color:var(--text);font:14px/1.35 system-ui,-apple-system,"Segoe UI",sans-serif;overflow:hidden}
#app{display:grid;grid-template-columns:232px 1fr;height:100vh}
#side{background:var(--panel);border-right:1px solid var(--line);display:flex;flex-direction:column;min-height:0}
.brand{padding:14px 16px;font-size:16px;letter-spacing:.2px;border-bottom:1px solid var(--line)}
.brand b{color:var(--accent)}
.section{padding:12px 16px;border-bottom:1px solid var(--line)}
.label{font-size:11px;text-transform:uppercase;letter-spacing:.08em;color:var(--dim)}
.label.pad{padding:10px 16px 6px}
#brushName{color:var(--text);text-transform:none;letter-spacing:0;margin-left:4px}
#brushPreview{width:72px;height:72px;margin:8px 0;border:1px solid var(--line);border-radius:8px;background:#0c0e13 center/contain no-repeat;transition:transform .12s}
.hint{font-size:12px;color:var(--dim)}
#side .custom{display:flex;gap:8px;margin:2px 0 8px}
#side .custom label{display:flex;flex-direction:column;gap:3px;font-size:11px;color:var(--dim);flex:1;min-width:0}
#side .custom input{width:100%;padding:4px 6px}
kbd{background:var(--panel2);border:1px solid var(--line);border-bottom-width:2px;border-radius:4px;padding:0 5px;font:11px ui-monospace,monospace;color:var(--text)}
#palette{overflow:auto;padding:0 12px 16px;display:grid;grid-template-columns:repeat(4,1fr);gap:6px;align-content:start;flex:1}
.tile{aspect-ratio:1;border:1px solid var(--line);border-radius:6px;background:#0c0e13 center/contain no-repeat;cursor:pointer;padding:0;position:relative}
.tile:hover{border-color:var(--dim)}
.tile.sel{border-color:var(--accent);box-shadow:0 0 0 1px var(--accent) inset}
.tile i{position:absolute;right:2px;bottom:1px;font:9px ui-monospace,monospace;color:var(--dim);font-style:normal}
#main{position:relative;min-width:0;min-height:0}
#cv{position:absolute;inset:0;width:100%;height:100%;display:block;cursor:crosshair;background:#000}
#cv.pan{cursor:grab}
#cv.panning{cursor:grabbing}
#top{position:absolute;top:10px;left:10px;right:10px;display:flex;gap:10px;align-items:center;justify-content:space-between;pointer-events:none;flex-wrap:wrap}
#top>*{pointer-events:auto}
.group{display:flex;gap:6px;align-items:center;background:rgba(27,30,39,.92);border:1px solid var(--line);border-radius:10px;padding:5px 6px;backdrop-filter:blur(6px)}
#users{display:flex;gap:6px;flex:1;justify-content:center;pointer-events:none;flex-wrap:wrap}
.user{display:flex;align-items:center;gap:6px;background:rgba(27,30,39,.92);border:1px solid var(--line);border-radius:999px;padding:3px 10px 3px 4px;font-size:12px;pointer-events:auto}
.user .sw{width:14px;height:14px;border-radius:50%}
.user.me{border-color:var(--accent)}
.chip{padding:3px 8px;cursor:pointer;font-size:13px}
.chip .copy{color:var(--dim);margin-left:6px;font-size:11px}
.chip:hover .copy{color:var(--accent)}
.dot{width:9px;height:9px;border-radius:50%;margin-right:4px}
.dot.on{background:var(--good)} .dot.off{background:var(--bad)}
button,input{font:inherit;color:var(--text)}
button{background:var(--panel2);border:1px solid var(--line);border-radius:7px;padding:5px 11px;cursor:pointer}
button:hover:not(:disabled){border-color:var(--dim)}
button:disabled{opacity:.4;cursor:default}
button.primary{background:var(--accent);color:#1a1300;border-color:var(--accent);font-weight:600}
input{background:#0c0e13;border:1px solid var(--line);border-radius:7px;padding:5px 9px;width:120px}
#status{position:absolute;left:10px;bottom:10px;display:flex;gap:14px;font-size:12px;color:var(--dim);background:rgba(27,30,39,.85);border:1px solid var(--line);border-radius:8px;padding:4px 10px;pointer-events:none}
#coords{font-family:ui-monospace,monospace;color:var(--text)}
#cmdBox{position:absolute;left:50%;bottom:64px;transform:translateX(-50%);width:min(420px,90%);background:var(--panel);border:1px solid var(--accent);border-radius:10px;padding:10px 12px;box-shadow:0 8px 30px rgba(0,0,0,.45)}
#cmdBox input{width:100%;margin:6px 0 4px;font:14px ui-monospace,monospace}
#cmdTitle{font-size:12px;color:var(--dim)}
#cmdTitle b{color:var(--text)}
#playBanner{position:absolute;top:64px;left:50%;transform:translateX(-50%);background:rgba(0,0,0,.75);border:1px solid var(--accent);color:var(--text);padding:6px 14px;border-radius:999px;font-size:13px}
#playBanner.win{border-color:var(--good);color:var(--good)}
#toast{position:absolute;bottom:50px;left:50%;transform:translateX(-50%);background:var(--panel2);border:1px solid var(--line);padding:7px 14px;border-radius:8px}
#loading{position:absolute;inset:0;display:grid;place-items:center;background:var(--bg);color:var(--dim)}
[hidden]{display:none!important}
dialog{background:var(--panel);color:var(--text);border:1px solid var(--line);border-radius:12px;width:min(560px,92vw);padding:18px}
dialog::backdrop{background:rgba(0,0,0,.6)}
dialog h3{margin:0 0 4px}
dialog p{margin:0 0 10px;color:var(--dim)}
dialog textarea{width:100%;height:150px;background:#0c0e13;border:1px solid var(--line);border-radius:8px;color:var(--text);font:12px ui-monospace,monospace;padding:8px;resize:vertical}
dialog .row{display:flex;gap:8px;justify-content:flex-end;margin-top:12px}
@media (max-width:820px){#app{grid-template-columns:150px 1fr}#palette{grid-template-columns:repeat(2,1fr)}#users{display:none}}

.dimnote{text-transform:none;letter-spacing:0;color:var(--dim);opacity:.7;margin-left:4px}
#side .hues{margin-bottom:6px}
.hueBtns{display:flex;gap:6px;margin-bottom:6px}
.hueBtns button{flex:1;padding:3px 6px;font-size:12px}
.hueBtns button.on{border-color:var(--accent);color:var(--accent)}

/* ---- new features ---- */
#side .custom label .dimnote{display:inline}
#side .custom input[type=text]{font:12px ui-monospace,monospace}
.checks{display:flex;flex-direction:column;gap:2px;font-size:12px;color:var(--dim);margin:0 0 8px}
.checks label{display:flex;gap:6px;align-items:center}
.checks input{width:auto;padding:0}
.palHead{display:flex;align-items:center;gap:6px;padding:10px 12px 4px 16px}
.palHead .label{flex:1}
.palHead select{background:#0c0e13;color:var(--text);border:1px solid var(--line);border-radius:6px;font-size:11px;padding:2px 3px;max-width:92px}
.palHead button{padding:2px 7px;font-size:11px;white-space:nowrap}
.palHint{padding:0 16px 6px;font-size:11px}
button.link{background:none;border:0;padding:0;color:var(--accent);text-decoration:underline;font-size:11px;cursor:pointer}
.tile .pv{position:absolute;inset:2px;background:center/contain no-repeat;pointer-events:none}
.tile.custom{border-color:#4a5170}
.tile.custom::after{content:"";position:absolute;top:2px;right:2px;width:6px;height:6px;border-radius:50%;background:var(--accent);opacity:.85}
.tile.over{outline:2px dashed var(--accent);outline-offset:-2px}
.tile.dragging{opacity:.35}
.tile .cm{position:absolute;left:2px;top:1px;max-width:90%;overflow:hidden;white-space:nowrap;font:bold 8px ui-monospace,monospace;color:var(--accent);text-shadow:0 0 2px #000,0 0 2px #000}
.tile .rt{position:absolute;left:2px;bottom:1px;font:8px ui-monospace,monospace;color:#9fc4ff;text-shadow:0 0 2px #000}
#viewMode{color:var(--accent);font-weight:600;text-transform:uppercase;letter-spacing:.06em;font-size:11px}
/* dock: comment list, bottom-left above the status bar */
#dock{position:absolute;left:10px;bottom:46px;display:flex;flex-direction:column;gap:8px;align-items:flex-start;pointer-events:none;z-index:3}
#dock>*{pointer-events:auto}
#cPanel{width:min(300px,60vw);background:rgba(27,30,39,.94);border:1px solid var(--line);border-radius:10px;overflow:hidden;backdrop-filter:blur(6px)}
#cHead{width:100%;text-align:left;border:0;border-radius:0;background:transparent;display:flex;gap:6px;align-items:center;padding:6px 10px}
#cHead .dimnote{margin-left:auto}
#cBadge{background:var(--accent);color:#1a1300;border-radius:999px;font-size:11px;font-weight:700;padding:0 6px}
#cBody{display:flex;flex-direction:column;border-top:1px solid var(--line)}
#cPanel.collapsed #cBody{display:none}
.cTabs{display:flex;gap:4px;padding:6px 8px 0}
.cTabs button{flex:1;padding:3px 6px;font-size:12px;background:transparent}
.cTabs button.on{background:var(--panel2);border-color:var(--dim)}
#cList{max-height:min(280px,40vh);overflow:auto;padding:6px 8px 8px;display:flex;flex-direction:column;gap:5px}
#cList .empty{color:var(--dim);font-size:12px;padding:8px 4px;line-height:1.4}
.cItem{display:block;width:100%;text-align:left;background:var(--panel2);border:1px solid var(--line);border-radius:8px;padding:6px 8px;font-size:12.5px;line-height:1.3}
.cItem .meta{display:flex;gap:6px;align-items:center;color:var(--dim);font-size:11px;margin-bottom:2px}
.cItem .meta .sw{width:9px;height:9px;border-radius:50%;flex:none}
.cItem .meta .at{margin-left:auto;font-family:ui-monospace,monospace}
.cItem .txt{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;word-break:break-word;white-space:pre-line}
.cItem .rc{color:var(--accent);font-size:11px;margin-top:2px}
/* comment popover, anchored to a tile */
#cPop{position:absolute;z-index:4;width:290px;max-height:min(480px,70vh);overflow:auto;background:var(--panel);border:1px solid var(--accent);border-radius:10px;box-shadow:0 8px 30px rgba(0,0,0,.5);font-size:13px}
#cPop .ph{display:flex;align-items:center;gap:6px;padding:7px 10px;border-bottom:1px solid var(--line);color:var(--dim);font-size:12px;position:sticky;top:0;background:var(--panel);z-index:1}
#cPop .ph b{color:var(--text)}
#cPop .ph .x{margin-left:auto;padding:0 7px;line-height:20px;background:transparent;border:0;font-size:15px}
.cThread{padding:8px 10px;border-bottom:1px solid var(--line)}
.cThread.res{opacity:.65}
.cMsg{margin-bottom:8px}
.cMsg .who{display:flex;align-items:center;gap:6px;font-size:12px}
.cMsg .who .sw{width:10px;height:10px;border-radius:50%;flex:none}
.cMsg .who b{font-weight:600}
.cMsg .who .when{color:var(--dim);font-size:11px}
.cMsg .who .del{margin-left:auto;padding:0 6px;line-height:18px;background:transparent;border:0;color:var(--dim);font-size:13px;visibility:hidden}
.cMsg:hover .who .del{visibility:visible}
.cMsg .del:hover{color:var(--bad)}
.cMsg .body{margin:2px 0 0 16px;white-space:pre-wrap;word-break:break-word;line-height:1.35}
.cThread textarea,.cNew textarea{width:100%;resize:none;height:34px;background:#0c0e13;border:1px solid var(--line);border-radius:7px;color:var(--text);padding:6px 8px;font:inherit;display:block}
.cThread textarea:focus,.cNew textarea:focus{outline:0;border-color:var(--accent)}
.cActs{display:flex;gap:6px;margin-top:6px;align-items:center}
.cActs button{padding:2px 9px;font-size:12px}
.cActs .note{color:var(--dim);font-size:11px;margin-right:auto}
.cNew{padding:8px 10px}
.cNew .newLink{background:transparent;border:0;color:var(--accent);padding:0;font-size:12px}
#cv.chit{cursor:pointer}
/* dialogs */
#histList{max-height:50vh;overflow:auto;display:flex;flex-direction:column;gap:6px;margin-bottom:4px}
#histList h4{margin:8px 0 2px;font-size:11px;text-transform:uppercase;letter-spacing:.08em;color:var(--dim);font-weight:500}
.hrow{display:flex;gap:8px;align-items:center;background:var(--panel2);border:1px solid var(--line);border-radius:8px;padding:6px 8px;font-size:13px}
.hrow .when{flex:1;min-width:0}.hrow .when small{color:var(--dim);margin-left:6px}
.hrow button{padding:3px 9px;font-size:12px}
.hrow button.armed{background:var(--bad);border-color:var(--bad);color:#190000}
.hempty{color:var(--dim);font-size:13px;padding:4px 2px}
.edges{display:flex;flex-direction:column;gap:6px;margin:6px 0 10px}
.edge{display:flex;gap:6px;align-items:center}
.edge>span:first-child{width:58px;color:var(--dim);font-size:13px}
.edge input{width:72px}
.edge .x{color:var(--dim)}
.edge button{padding:4px 10px}
.pad0{margin-top:6px}

#side{overflow-y:auto}
#palette{grid-template-columns:repeat(4,minmax(0,1fr));flex:1 0 300px;overflow:visible}
.tile{min-width:0}
details.section>summary{cursor:pointer;list-style:none}
details.section>summary::-webkit-details-marker{display:none}
details.section>summary::before{content:"▸";display:inline-block;width:12px;color:var(--dim)}
details.section[open]>summary::before{content:"▾"}
details.section[open]>summary{margin-bottom:8px}
.palHead select{max-width:84px}
#palette{align-items:start;grid-auto-rows:min-content}
.tile{width:100%;height:auto;margin:0}
.cNew:empty{display:none}

#helpModal{width:min(640px,94vw)}
#helpBody{max-height:68vh;overflow:auto;padding-right:6px;font-size:13px;line-height:1.45}
#helpBody h4{margin:14px 0 6px;font-size:11px;text-transform:uppercase;letter-spacing:.08em;color:var(--dim);font-weight:500}
#helpBody h4:first-child{margin-top:0}
#helpBody dl{display:grid;grid-template-columns:minmax(120px,max-content) 1fr;gap:5px 14px;margin:0}
#helpBody dt{color:var(--text);white-space:nowrap}
#helpBody dd{margin:0;color:var(--dim)}
#helpBody code{background:var(--panel2);border-radius:4px;padding:0 4px;font:12px ui-monospace,monospace;color:var(--text)}
.cNew .cActs{justify-content:flex-end}