:root{--bg:#f3efe7;--paper:#f7f4ee;--panel:#fffdf9;--line:#e3dccf;--ink:#2b2824;--muted:#8a8174;--accent:#b5653a;--accent-soft:#f3e3d8;--teal:#2f5d62}*{box-sizing:border-box}html,body{margin:0;height:100%;background:var(--bg);color:var(--ink);overflow:hidden;overscroll-behavior:none;touch-action:manipulation;-webkit-text-size-adjust:100%;-webkit-tap-highlight-color:transparent;font:13px/1.5 -apple-system,BlinkMacSystemFont,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif}button,input,select{font:inherit;color:inherit}.app{display:grid;grid-template-rows:auto minmax(0,1fr) 30px;grid-template-columns:236px minmax(0,1fr) 300px;height:100vh;height:100dvh;padding:env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);-webkit-user-select:none;user-select:none;-webkit-touch-callout:none}input{-webkit-user-select:text;user-select:text}header{grid-column:1/-1;display:flex;flex-wrap:wrap;align-items:center;gap:6px 10px;padding:8px 14px;background:var(--panel);border-bottom:1px solid var(--line)}.brand{display:flex;flex-direction:column;margin-right:8px;line-height:1.25}.brand b{font-size:15px;letter-spacing:.5px}.brand span{color:var(--muted);font-size:12px}.grp{display:flex;align-items:center;gap:2px;padding:2px;border:1px solid var(--line);border-radius:8px;background:#fff}.btn{border:0;background:transparent;padding:5px 9px;border-radius:6px;cursor:pointer;white-space:nowrap}.btn:hover{background:#f2ece2}.btn.on{background:var(--ink);color:#fff}.btn.chip.on{background:var(--accent-soft);color:var(--accent)}#langSel .btn{min-width:32px;font-weight:500}.btn.primary{background:var(--accent);color:#fff}.btn.primary:hover{background:#9f5530}.btn.danger{color:#b3372a}.spacer{flex:1}aside{background:var(--panel);overflow:auto;border-right:1px solid var(--line)}aside.right{border-right:0;border-left:1px solid var(--line)}.lib h4{margin:0;padding:12px 14px 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16px;color:var(--muted);font-size:12px}main{position:relative;overflow:hidden;background:var(--paper)}#plan{width:100%;height:100%;display:block;touch-action:none;cursor:default}#plan.panning{cursor:grabbing}#plan.tool-measure,#plan.tool-addWall{cursor:crosshair}#plan .wall{pointer-events:none}#plan.tool-demolish .wall{pointer-events:all;cursor:pointer}#plan.tool-demolish .wall:hover{fill:#d9894f}#plan.tool-select .wall{pointer-events:all;cursor:pointer}#plan.tool-addOpen .wall{pointer-events:all;cursor:crosshair}#plan.tool-addOpen .wall:hover{fill:#d9894f}#plan.tool-select [data-win],#plan.tool-select [data-door],#plan.tool-select [data-slide]{pointer-events:all;cursor:pointer}#plan.tool-select .room:hover{opacity:.82}#plan .furn{cursor:move}@media(hover:hover){#plan .furn:hover{filter:drop-shadow(0 0 2px rgba(181,101,58,.7))}}[data-handle]{cursor:pointer}[data-handle=size]{cursor:nwse-resize}.scalebar{position:absolute;left:14px;bottom:12px;background:#fffdf9eb;border:1px solid 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