:root{--bg: #f7f7f8;--text: #1d1f23;--muted: #6b7280;--primary: #1f78ff}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,"Apple Color Emoji","Segoe UI Emoji";background:var(--bg);color:var(--text);-webkit-user-select:none;user-select:none}.app-root{display:flex;flex-direction:column;height:100%}.app-header{display:flex;align-items:center;justify-content:space-between;padding:12px 24px;background:#fff;border-bottom:1px solid #e5e7eb;box-shadow:0 1px 3px #0000000d}.app-header h1{font-size:20px;margin:0;font-weight:600}.toolbar{display:flex;gap:8px}.btn{padding:8px 16px;border:1px solid #e5e7eb;background:#fff;border-radius:6px;cursor:pointer;font-size:14px;font-weight:500;transition:all .15s ease}.btn:hover{border-color:#d1d5db;background:#f9fafb}.btn.active{background:var(--primary);color:#fff;border-color:var(--primary)}.btn.active:hover{background:#1565c0;border-color:#1565c0}.app-main{flex:1;overflow:auto;padding:24px}.plan-canvas{display:inline-block;background:#fff;border:1px solid #e5e7eb;border-radius:8px;box-shadow:0 4px 6px #0000000d;padding:8px}.plan-svg{display:block}.axis-label{font-size:12px;fill:var(--muted);font-weight:500}.label{font-size:12px;fill:#111827;font-weight:500}.dim-label{font-size:11px;fill:#374151;font-weight:500;dominant-baseline:central}.dim-label-small{font-size:9px;fill:#6b7280;font-weight:500;dominant-baseline:central}.legend-text{font-size:12px;fill:#111827;font-weight:500}.room-label{font-size:11px;fill:#1f2937;font-weight:600}.room-area-label{font-size:9px;fill:#6b7280;font-weight:500}.floor2-label{font-size:13px;fill:#7c3aed;font-weight:600;font-style:italic}.building-group rect{transition:fill .15s ease}.building-group rect:hover{fill:#dbeafe!important}.room-group rect{transition:all .15s ease}.room-group rect:hover{stroke-width:2!important}.parking-group rect{transition:all .15s ease}.parking-group rect:hover{stroke-width:2!important}.element-group rect{transition:all .15s ease}.element-group rect:hover{stroke-width:2.5!important}.component-palette{background:#fff;border:1px solid #e5e7eb;border-radius:8px;padding:16px;margin-bottom:16px;box-shadow:0 2px 4px #0000000d;display:inline-block}.component-palette h3{margin:0 0 12px;font-size:14px;font-weight:600;color:var(--text)}.palette-buttons{display:flex;gap:8px;flex-wrap:wrap}.palette-btn{padding:8px 16px;border:2px solid #e5e7eb;background:#fff;border-radius:6px;cursor:pointer;font-size:14px;font-weight:500;transition:all .15s ease;display:flex;align-items:center;gap:6px}.palette-btn:hover{border-color:var(--primary);background:#f0f9ff}.palette-btn.selected{background:var(--primary);color:#fff;border-color:var(--primary)}.palette-hint{margin:12px 0 0;font-size:12px;color:var(--muted);font-style:italic}