:root{--bg:#f1f5f9;--panel:#ffffff;--line:#e2e8f0;--text:#0f172a;--muted:#64748b;--accent:#2563eb;--danger:#dc2626}@media (prefers-color-scheme: dark){:root{--bg:#0f172a;--panel:#1e293b;--line:#334155;--text:#f1f5f9;--muted:#94a3b8;--accent:#60a5fa}}*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text)}button{cursor:pointer;border:1px solid var(--line);background:var(--panel);color:var(--text);border-radius:8px;padding:6px 10px;font-size:13px}button:hover{border-color:var(--accent)}button.active{background:var(--accent);color:#fff;border-color:var(--accent)}button:disabled{opacity:.45;cursor:not-allowed}button.danger{color:var(--danger);border-color:#fca5a5}input,textarea,select{font:inherit;color:var(--text);background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:7px 9px;width:100%}input[type=checkbox]{width:auto}input[type=color]{height:34px;padding:2px}.app{display:flex;flex-direction:column;height:100vh}.toolbar{display:flex;align-items:center;gap:10px;padding:10px 12px;background:var(--panel);border-bottom:1px solid var(--line);flex-wrap:wrap;position:relative;z-index:20}.brand{font-weight:800;font-size:16px;white-space:nowrap}.name-input{max-width:240px;font-weight:700}.toolbar-group{display:flex;gap:6px;align-items:center;flex-wrap:wrap}.segmented{display:flex;gap:0}.segmented button{border-radius:0}.segmented button:first-child{border-radius:8px 0 0 8px}.segmented button:last-child{border-radius:0 8px 8px 0}.popover{position:absolute;top:100%;right:12px;background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:14px;width:340px;max-width:90vw;box-shadow:0 12px 40px #0003;z-index:50}.popover ul{padding-left:18px;font-size:13px;line-height:1.6}.template-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:10px 0}.toast{position:fixed;bottom:18px;left:50%;transform:translate(-50%);background:#0f172a;color:#fff;padding:10px 16px;border-radius:999px;font-size:13px;z-index:100;box-shadow:0 8px 30px #0000004d}.main{display:flex;flex:1;min-height:0}.library{width:250px;flex-shrink:0;background:var(--panel);border-right:1px solid var(--line);padding:12px;overflow-y:auto;display:flex;flex-direction:column;gap:10px}.collapse-btn{text-align:left}.chip-row{display:flex;flex-wrap:wrap;gap:6px}.chip{font-size:12px;padding:4px 8px;border-radius:999px}.chip.active{background:var(--accent);color:#fff}.hint{font-size:12px;color:var(--muted);margin:0}.lib-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px}.lib-card{display:flex;flex-direction:column;gap:4px;text-align:left;padding:10px}.lib-swatch{width:100%;height:10px;border-radius:4px;display:block}.lib-card small{color:var(--muted)}.stage{flex:1;display:flex;flex-direction:column;min-width:0}.canvas-wrap{flex:1;display:flex;flex-direction:column;min-height:0}.canvas-toolbar{display:flex;gap:10px;align-items:center;padding:8px 12px;background:var(--panel);border-bottom:1px solid var(--line);flex-wrap:wrap;font-size:13px}.canvas-toolbar label{display:flex;gap:6px;align-items:center}.cursor-coords{margin-left:auto;color:var(--muted)}.tool-hint{color:var(--accent);font-weight:600}.canvas-scroll{flex:1;overflow:auto;background:#e8eef5}.canvas-svg{background:#fff;display:block;cursor:crosshair;touch-action:none}.props{width:280px;flex-shrink:0;background:var(--panel);border-left:1px solid var(--line);padding:14px;overflow-y:auto;display:flex;flex-direction:column;gap:12px}.props h3{margin:0;font-size:15px}.props label{display:flex;flex-direction:column;gap:6px;font-size:13px}.btn-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px}.stats{display:flex;gap:16px;padding:10px 12px;background:var(--panel);border-top:1px solid var(--line);flex-wrap:wrap;font-size:13px;position:relative}.stat{display:flex;flex-direction:column;gap:2px}.stat span{color:var(--muted);font-size:12px}.conflict-banner{width:100%;background:#fef3c7;color:#92400e;border:1px solid #fcd34d;padding:8px 10px;border-radius:8px;font-weight:600}.bad{color:var(--danger)}.good{color:#16a34a}.view3d-wrap{flex:1;display:flex;flex-direction:column;min-height:0}.view3d-mount{flex:1;min-height:320px}.view3d-mount canvas{display:block;width:100%!important;height:100%!important}@media (max-width: 900px){.main{flex-direction:column;overflow-y:auto}.library,.props{width:100%;border:none;border-bottom:1px solid var(--line)}.stage{min-height:70vh}.name-input{max-width:160px}}