:root{font-family:system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color:#213547;background-color:#fff;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}*{box-sizing:border-box}body{margin:0;min-width:320px;min-height:100vh}h1{font-size:2em;line-height:1.1}button,input,select{font-family:inherit}#root{width:100%;height:100vh;margin:0;padding:0}.app{display:flex;flex-direction:column;height:100vh;background-color:#f5f5f5}.app-header{background-color:#2c3e50;color:#fff;padding:1rem 2rem;box-shadow:0 2px 4px #0000001a}.app-header h1{margin:0;font-size:1.5rem}.app-main{flex:1;display:flex;flex-direction:column;padding:2rem;overflow:auto}.controls{display:flex;gap:2rem;margin-bottom:2rem;align-items:center}.upload-container{position:relative}.upload-label{display:inline-block;padding:.75rem 1.5rem;background-color:#3498db;color:#fff;border-radius:4px;cursor:pointer;transition:background-color .3s}.upload-label:hover{background-color:#2980b9}.upload-input{display:none}.floor-plan-selector{display:flex;align-items:center;gap:1rem}.floor-plan-selector label{font-weight:500}.floor-plan-dropdown{padding:.5rem 1rem;border:1px solid #ddd;border-radius:4px;background-color:#fff;font-size:1rem;cursor:pointer}.floor-plan-container{flex:1;background-color:#fff;border-radius:8px;box-shadow:0 2px 8px #0000001a;padding:1rem;overflow:hidden}.floor-plan-viewer{position:relative;width:100%;height:100%;cursor:crosshair;overflow:hidden}.floor-plan-image{width:100%;height:100%;object-fit:contain;-webkit-user-select:none;user-select:none}.sensor-dot{position:absolute;width:20px;height:20px;background-color:#e74c3c;border-radius:50%;transform:translate(-50%,-50%);cursor:pointer;transition:all .2s;z-index:10}.sensor-dot:hover{transform:translate(-50%,-50%) scale(1.2)}.sensor-dot.selected{background-color:#f39c12;box-shadow:0 0 0 3px #f39c124d}.sensor-tooltip{position:absolute;bottom:100%;left:50%;transform:translate(-50%);background-color:#000c;color:#fff;padding:.5rem .75rem;border-radius:4px;font-size:.875rem;white-space:nowrap;pointer-events:none;opacity:0;transition:opacity .2s;margin-bottom:8px}.sensor-dot:hover .sensor-tooltip{opacity:1;pointer-events:auto}.delete-button{margin-left:.5rem;background-color:transparent;border:none;color:#e74c3c;cursor:pointer;font-size:1.2rem;padding:0 .25rem;pointer-events:auto}.empty-state{flex:1;display:flex;align-items:center;justify-content:center;color:#666;font-size:1.2rem}.modal-overlay{position:fixed;inset:0;background-color:#00000080;display:flex;align-items:center;justify-content:center;z-index:1000}.modal-content{background-color:#fff;padding:2rem;border-radius:8px;box-shadow:0 4px 12px #00000026;min-width:300px}.modal-content h3{margin-top:0;margin-bottom:1.5rem}.form-group{margin-bottom:1.5rem}.form-group label{display:block;margin-bottom:.5rem;font-weight:500}.form-group input{width:100%;padding:.5rem;border:1px solid #ddd;border-radius:4px;font-size:1rem}.modal-actions{display:flex;gap:1rem;justify-content:flex-end}.btn-primary,.btn-secondary{padding:.5rem 1rem;border:none;border-radius:4px;cursor:pointer;font-size:1rem;transition:background-color .2s}.btn-primary{background-color:#3498db;color:#fff}.btn-primary:hover{background-color:#2980b9}.btn-secondary{background-color:#ecf0f1;color:#2c3e50}.btn-secondary:hover{background-color:#bdc3c7}