*{box-sizing:border-box;margin:0;padding:0}:root{--bg:#0f0f1a;--surface:#1a1a2e;--surface2:#222240;--border:#335;--text:#e0e0f0;--text-dim:#88a;--accent:#58f;--danger:#f45}body{background:var(--bg);color:var(--text);font-family:Segoe UI,system-ui,-apple-system,sans-serif;font-size:13px;overflow:hidden}#root{width:100vw;height:100vh}.app{flex-direction:column;height:100vh;display:flex}.toolbar{background:var(--surface);border-bottom:1px solid var(--border);flex-shrink:0;align-items:center;gap:16px;padding:6px 12px;display:flex}.toolbar-group{align-items:center;gap:4px;display:flex}.toolbar-label{color:var(--text-dim);text-transform:uppercase;letter-spacing:.5px;margin-right:4px;font-size:11px}button{background:var(--surface2);color:var(--text);border:1px solid var(--border);cursor:pointer;border-radius:4px;padding:4px 10px;font-size:12px;transition:background .1s}button:hover{background:var(--accent);border-color:var(--accent)}button:disabled{opacity:.4;cursor:default}button:disabled:hover{background:var(--surface2);border-color:var(--border)}.btn-danger{border-color:var(--danger);color:var(--danger)}.btn-danger:hover{background:var(--danger);color:#fff}.btn-small{padding:2px 8px;font-size:11px}.snap-active{background:var(--accent);border-color:var(--accent)}.toolbar-warnings{align-items:center;gap:6px;margin-left:auto;display:flex}.unresolved-y{color:#ffc828;white-space:nowrap;background:#ffc82826;border:1px solid #ffc82880;border-radius:4px;padding:3px 10px;font-size:11px;font-weight:600}.bounds-warning{color:#f33;white-space:nowrap;background:#ff282833;border:1px solid #ff2828b3;border-radius:4px;padding:3px 10px;font-size:11px;font-weight:700}.collision-warning{color:#f44;white-space:nowrap;background:#ff282826;border:1px solid #ff282899;border-radius:4px;padding:3px 10px;font-size:11px;font-weight:600}.main-area{flex:1;min-height:0;display:flex}.canvas-container{flex:1;min-width:0;position:relative}.side-panel{border-left:1px solid var(--border);flex-direction:column;flex-shrink:0;width:300px;display:flex;overflow-y:auto}.properties-panel{border-bottom:1px solid var(--border)}.panel-header{background:var(--surface);border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;padding:8px 12px;font-size:13px;font-weight:600;display:flex}.seg-index{color:var(--text-dim);font-size:11px;font-weight:400}.panel-body{padding:8px 12px}.panel-empty{color:var(--text-dim);padding:16px 12px;font-size:12px}.prop-row{justify-content:space-between;align-items:center;gap:8px;margin-bottom:6px;display:flex}.prop-row label{color:var(--text-dim);flex-shrink:0;min-width:80px;font-size:11px}.prop-row input[type=number],.prop-row input[type=text],.prop-row select{background:var(--bg);color:var(--text);border:1px solid var(--border);border-radius:3px;width:100px;padding:3px 6px;font-size:12px}.prop-row input[type=number]:focus,.prop-row input[type=text]:focus,.prop-row select:focus{border-color:var(--accent);outline:none}.toggle-group{gap:2px;display:flex}.toggle-group button,.degree-presets button{border-radius:3px;padding:2px 8px;font-size:11px}.toggle-active{background:var(--accent)!important;border-color:var(--accent)!important}.degree-presets{flex-wrap:wrap;align-items:center;gap:2px;display:flex}.track-stats{border-top:1px solid var(--border);color:var(--text-dim);padding:8px 12px;font-family:monospace;font-size:11px}.track-stats-title{color:var(--text);margin-bottom:2px;font-family:Segoe UI,system-ui,sans-serif;font-weight:600}.cursor-info{border-top:1px solid var(--border);color:var(--text-dim);padding:8px 12px;font-family:monospace;font-size:11px}.cursor-info-title{color:var(--text);margin-bottom:2px;font-family:Segoe 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16px;overflow:auto}.modal-hint{color:var(--text-dim);margin-bottom:8px;font-size:12px}.import-textarea{background:var(--bg);width:100%;height:280px;color:var(--text);border:1px solid var(--border);resize:vertical;border-radius:4px;padding:8px;font-family:Fira Code,Cascadia Code,JetBrains Mono,monospace;font-size:11px;line-height:1.5}.import-textarea:focus{border-color:var(--accent);outline:none}.import-textarea::placeholder{color:var(--text-dim);opacity:.5}.import-error{color:var(--danger);margin-top:6px;font-size:12px}.modal-footer{border-top:1px solid var(--border);justify-content:flex-end;gap:8px;padding:10px 16px;display:flex}