:root, html[data-theme="dark"]{
  --bg:#0f1420; --bg2:#161c2b; --panel:#1a2133; --line:#2a3350;
  --fg:#e8ecf5; --muted:#9aa5c0; --accent:#6c8cff; --accent2:#8f6cff;
  --node:#1e2740; --node-line:#3b4a7a; --ok:#3ecf8e; --warn:#ffb020; --danger:#ff5d5d;
}
html[data-theme="light"]{
  --bg:#f4f6fb; --bg2:#ffffff; --panel:#ffffff; --line:#dfe5f2;
  --fg:#1b2334; --muted:#5b6a8c; --accent:#2f5bff; --accent2:#7a3cff;
  --node:#ffffff; --node-line:#b9c6ea;
}
*{box-sizing:border-box}
button{touch-action:manipulation}
[hidden]{display:none !important}
#tour:empty,#nodeMenu:empty{display:none !important}
html,body{height:100%}
body{margin:0;background:var(--bg);color:var(--fg);font:14px/1.45 system-ui,Segoe UI,Roboto,Arial}
#app{display:flex;flex-direction:column;height:100vh;height:100dvh}
#btnMenu{display:none;background:var(--panel);border:1px solid var(--line);color:var(--fg);border-radius:8px;padding:6px 10px;cursor:pointer}
#topbar{display:flex;align-items:center;gap:12px;padding:8px 12px;background:var(--bg2);border-bottom:1px solid var(--line)}
.brand{font-weight:800;letter-spacing:.5px}
.tabs{display:flex;gap:6px}
.tab{background:transparent;border:1px solid var(--line);color:var(--fg);border-radius:8px;padding:6px 14px;cursor:pointer}
.tab.active{background:var(--accent);border-color:var(--accent);color:#fff}
.top-actions{margin-left:auto;display:flex;gap:6px}
.top-actions button,.toolgrid button,.ai-modes button{background:var(--panel);border:1px solid var(--line);color:var(--fg);border-radius:8px;padding:6px 10px;cursor:pointer}
.top-actions button:hover,.toolgrid button:hover,.ai-modes button:hover{border-color:var(--accent)}
button.accent{background:var(--accent);border-color:var(--accent);color:#fff}
.dberr{background:#4a1d1d;color:#ffd7d7;padding:8px 12px;border-bottom:1px solid #7a2e2e}
#main{flex:1;display:flex;min-height:0}
#left{width:230px;background:var(--bg2);border-right:1px solid var(--line);padding:10px;overflow:auto}
.side-head{display:flex;gap:6px}
.side-head select{flex:1;background:var(--panel);color:var(--fg);border:1px solid var(--line);border-radius:8px;padding:6px}
#libList{list-style:none;margin:8px 0;padding:0}
#libList li{padding:7px 9px;border:1px solid transparent;border-radius:8px;cursor:pointer;display:flex;justify-content:space-between;gap:6px}
#libList li:hover{border-color:var(--line)}
#libList li.sel{background:var(--panel);border-color:var(--accent)}
#libList li .del{opacity:.5}#libList li .del:hover{opacity:1;color:var(--danger)}
.side-sec{margin:12px 0 6px;color:var(--muted);font-size:12px;text-transform:uppercase;letter-spacing:.6px}
.toolgrid{display:grid;grid-template-columns:1fr 1fr;gap:6px}
#swatches{display:flex;gap:6px;flex-wrap:wrap}
.sw{width:26px;height:26px;border-radius:50%;border:2px solid transparent;cursor:pointer}
.sw.sel{border-color:#fff}
#icons{display:flex;gap:4px;flex-wrap:wrap;margin-top:6px}
#icons button{background:transparent;border:1px solid var(--line);border-radius:8px;cursor:pointer;font-size:16px;padding:2px 6px}
#center{flex:1;display:flex;flex-direction:column;min-width:0;position:relative}
#plannerBar{display:flex;gap:6px;padding:8px;background:var(--bg2);border-bottom:1px solid var(--line)}
#plannerBar input,#plannerBar select{background:var(--panel);border:1px solid var(--line);color:var(--fg);border-radius:8px;padding:6px 8px}
#taskTitle{flex:1}
#viewport{flex:1;position:relative;overflow:hidden;touch-action:none;background:radial-gradient(circle at 1px 1px,var(--line) 1px,transparent 1px);background-size:26px 26px;background-color:var(--bg)}
#edges{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;overflow:visible}
#edges path.link{pointer-events:stroke;cursor:pointer}
#edges path.link:hover{stroke-width:4}
#world{position:absolute;left:0;top:0;transform-origin:0 0;min-width:10px;min-height:10px}
#empty{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;text-align:center;color:var(--muted);font-size:18px;pointer-events:none}
#empty span{font-size:13px}
.node{position:absolute;min-width:130px;max-width:240px;background:var(--node);border:2px solid var(--node-line);border-radius:12px;padding:8px 10px;cursor:grab;user-select:none;box-shadow:0 4px 14px rgba(0,0,0,.35)}
.node.sel{border-color:var(--accent);box-shadow:0 0 0 2px var(--accent)}
.node.root{border-width:3px;font-weight:700}
.node .lbl{outline:none;word-break:break-word}
.node .lbl[contenteditable="true"]{background:rgba(255,255,255,.08);border-radius:6px;cursor:text}
.node .meta{display:flex;gap:6px;align-items:center;margin-top:4px;font-size:12px;color:var(--muted)}
.node img.thumb{max-width:100%;border-radius:8px;margin-top:6px;display:block}
.node .collapse{position:absolute;right:-11px;top:50%;transform:translateY(-50%);width:20px;height:20px;border-radius:50%;background:var(--accent);color:#fff;border:none;cursor:pointer;font-size:12px;line-height:1}
.bitem{position:absolute;background:var(--node);border:2px solid var(--node-line);border-radius:10px;padding:10px;min-width:120px;min-height:60px;cursor:grab;user-select:none}
.bitem.sel{border-color:var(--accent)}
.bitem .txt{outline:none;white-space:pre-wrap;word-break:break-word}
.bitem img{max-width:100%;display:block;border-radius:6px}
.bitem .rs{position:absolute;right:2px;bottom:2px;width:14px;height:14px;cursor:nwse-resize;background:var(--accent);border-radius:4px}
.bitem .golink{margin-top:6px;background:var(--accent);border:1px solid var(--accent);color:#fff;border-radius:6px;cursor:pointer;padding:3px 8px;font-size:12px}
#minimap{position:absolute;right:12px;bottom:34px;background:var(--bg2);border:1px solid var(--line);border-radius:8px;opacity:.92}
#statusbar{display:flex;justify-content:space-between;padding:5px 12px;background:var(--bg2);border-top:1px solid var(--line);color:var(--muted);font-size:12px}
#kanban{flex:1;display:flex;gap:10px;padding:12px;overflow:auto}
.kcol{flex:1;background:var(--bg2);border:1px solid var(--line);border-radius:12px;padding:10px;min-width:220px}
.kcol h3{margin:0 0 8px}
.klist{min-height:120px;display:flex;flex-direction:column;gap:8px}
.kcard{background:var(--panel);border:1px solid var(--line);border-left:5px solid var(--accent);border-radius:8px;padding:8px;cursor:grab}
.kcard.done{opacity:.65;text-decoration:line-through}
.kcard .kd{font-size:12px;color:var(--muted)}
.kcard.overdue{border-left-color:var(--danger)}
.kcard.overdue .kd b{color:var(--danger)}
#search{width:150px;background:var(--panel);border:1px solid var(--line);color:var(--fg);border-radius:8px;padding:6px 8px}
#searchRes{position:absolute;top:46px;right:10px;width:300px;max-height:320px;overflow:auto;background:var(--panel);border:1px solid var(--accent);border-radius:10px;z-index:60}
#searchRes button{display:block;width:100%;text-align:left;background:transparent;border:none;color:var(--fg);padding:8px 10px;cursor:pointer}
#searchRes button:hover{background:var(--accent);color:#fff}
#searchRes .sk{font-size:11px;color:var(--muted);text-transform:uppercase}
#peers{display:flex;gap:4px;align-items:center}
.pchip{font-size:12px;background:var(--panel);border:1px solid var(--peer,#888);color:var(--fg);border-radius:20px;padding:2px 8px;white-space:nowrap}
#myName{width:90px;background:var(--panel);border:1px solid var(--line);color:var(--fg);border-radius:8px;padding:6px 8px}
.node.peer,.bitem.peer{box-shadow:0 0 0 3px var(--peer,#ff5d5d)}
#taskList{flex:1;overflow:auto;padding:12px}
#taskList table{width:100%;border-collapse:collapse}
#taskList th,#taskList td{text-align:left;padding:8px;border-bottom:1px solid var(--line)}
#taskList th{color:var(--muted);font-size:12px;text-transform:uppercase}
#taskList tr.overdue td:first-child{border-left:4px solid var(--danger)}
#present{position:fixed;inset:0;background:rgba(5,8,16,.96);z-index:100;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:40px}
#present h1{font-size:44px;margin:0 0 12px;max-width:800px}
#present p{font-size:20px;color:var(--muted);max-width:700px;white-space:pre-wrap}
#present img{max-width:60vw;max-height:40vh;border-radius:12px;margin-top:14px}
#present .pbar{position:absolute;bottom:26px;display:flex;gap:10px;align-items:center;color:var(--muted)}
#present .pbar button{background:var(--panel);border:1px solid var(--line);color:var(--fg);border-radius:8px;padding:8px 16px;cursor:pointer;font-size:16px}
#tour{position:fixed;inset:0;background:rgba(0,0,0,.55);z-index:101;display:flex;align-items:center;justify-content:center}
#tour .tcard{background:var(--panel);border:1px solid var(--accent);border-radius:14px;padding:22px;max-width:420px}
#tour .tcard h2{margin:0 0 8px}
#tour .tcard .row{justify-content:flex-end}
.kcol h3 .cnt{font-size:12px;color:var(--muted);font-weight:400}
body.readonly #left,body.readonly #aiPanel,body.readonly #plannerBar,
body.readonly #btnUndo,body.readonly #btnRedo,body.readonly #btnAI,
body.readonly #btnPresent,body.readonly #btnLive,body.readonly #myName,
body.readonly #peers,body.readonly #btnMenu,body.readonly #search{display:none}
body.readonly .kcard .kr{display:none}
body.readonly .kcard{cursor:default}

/* ============ mobile ============ */
@media(max-width:900px){
  #btnMenu{display:block}
  #topbar{flex-wrap:wrap;gap:8px}
  .brand{font-size:15px}
  .tab{padding:8px 10px}
  #search{width:110px}
  #myName{display:none}
  .top-actions{flex-wrap:wrap}
  .top-actions button,.toolgrid button,.ai-modes button{min-height:40px}
  #left{position:fixed;left:0;top:0;bottom:0;z-index:80;width:min(270px,84vw);transform:translateX(-105%);transition:transform .2s;box-shadow:0 0 30px rgba(0,0,0,.5)}
  body.menu-open #left{transform:none}
  #aiPanel{position:fixed;right:0;top:0;bottom:0;z-index:80;width:min(320px,88vw);box-shadow:0 0 30px rgba(0,0,0,.5)}
  #kanban{scroll-snap-type:x mandatory}
  .kcol{flex:0 0 80vw;scroll-snap-align:start}
  #plannerBar{flex-wrap:wrap}
  #taskTitle{flex:1 1 100%}
  #minimap{transform:scale(.72);transform-origin:bottom right;right:8px;bottom:30px}
  .node{min-width:110px;max-width:190px;font-size:13px}
  #present h1{font-size:28px}
  #present p{font-size:16px}
  #nodeMenu{min-width:170px}
  #nodeMenu button{padding:10px;font-size:14px}
}
.kcard .kr{display:flex;gap:4px;margin-top:6px}
.kcard .kr button{background:transparent;border:1px solid var(--line);color:var(--fg);border-radius:6px;cursor:pointer;font-size:12px}
#aiPanel{width:300px;background:var(--bg2);border-left:1px solid var(--line);padding:10px;overflow:auto}
#aiPanel.hide{display:none}
.ai-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}
#aiSettings label{display:block;margin:6px 0;font-size:12px}
#aiSettings input{width:100%;background:var(--panel);border:1px solid var(--line);color:var(--fg);border-radius:8px;padding:6px;margin-top:2px}
#aiSettings small{display:block;color:var(--muted);font-size:11px;margin-top:2px;line-height:1.4}
.row{display:flex;gap:6px;align-items:center;margin:6px 0}
.ai-modes{display:grid;grid-template-columns:1fr 1fr;gap:6px;margin:8px 0}
#aiPrompt{width:100%;min-height:80px;background:var(--panel);border:1px solid var(--line);color:var(--fg);border-radius:8px;padding:8px}
.ai-out{background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:8px;margin-top:8px;white-space:pre-wrap;overflow-wrap:anywhere;word-break:break-word;min-height:120px;max-height:50vh;overflow:auto;font-size:13px;line-height:1.55}
#nodeMenu{position:fixed;background:var(--panel);border:1px solid var(--accent);border-radius:10px;padding:6px;z-index:50;display:flex;flex-direction:column;gap:2px;min-width:200px;box-shadow:0 8px 24px rgba(0,0,0,.45)}
#nodeMenu button{background:transparent;border:none;color:var(--fg);border-radius:6px;cursor:pointer;padding:7px 10px;text-align:left;font-size:13px}
#nodeMenu button:hover{background:var(--accent);color:#fff}
#nodeMenu hr{border:none;border-top:1px solid var(--line);margin:4px 0}
@media(max-width:1000px){#left{width:180px}#aiPanel{width:250px}}