.file-uploader{padding:1.5rem}.file-uploader h3{font-size:1.1rem;margin-bottom:1rem;color:#fff}.upload-zone{border:2px dashed #444;border-radius:8px;padding:2rem 1rem;text-align:center;cursor:pointer;transition:all .3s ease;position:relative}.upload-zone:hover{border-color:#667eea;background:#667eea0d}.upload-zone.drag-active{border-color:#667eea;background:#667eea1a}.upload-zone input[type=file]{display:none}.upload-zone label{display:block;cursor:pointer}.upload-icon{font-size:2.5rem;margin-bottom:1rem;opacity:.7}.upload-text{font-size:1rem;color:#fff;margin-bottom:.5rem}.upload-hint{font-size:.85rem;color:#666}.error-message{margin-top:1rem;padding:.75rem;background:#dc26261a;border:1px solid rgba(220,38,38,.3);border-radius:4px;color:#fca5a5;font-size:.9rem}@media (max-width: 768px){.file-uploader{padding:1rem}.file-uploader h3{font-size:1rem}.upload-zone{padding:1.5rem .8rem}.upload-icon{font-size:2rem}.upload-text{font-size:.9rem}.upload-hint{font-size:.75rem}}@media (max-width: 480px){.file-uploader{padding:.8rem}.file-uploader h3{font-size:.95rem}.upload-zone{padding:1.2rem .6rem}.upload-icon{font-size:1.8rem;margin-bottom:.8rem}.upload-text{font-size:.85rem}.upload-hint{font-size:.7rem;line-height:1.4}}.three-viewer{width:100%;height:100%;display:flex;flex-direction:column;background:#111}.viewer-header{padding:1rem 1.5rem;background:#1a1a1af2;border-bottom:1px solid #333;display:flex;justify-content:space-between;align-items:center;flex-shrink:0}.file-info{display:flex;align-items:center;gap:1rem}.file-name{font-size:.95rem;color:#fff;font-weight:500}.file-format{padding:.25rem .75rem;background:#667eea;border-radius:4px;font-size:.75rem;font-weight:600}.viewer-canvas{flex:1;width:100%}.viewer-controls{position:absolute;bottom:1rem;left:1rem;right:1rem;display:flex;justify-content:center}.control-info{display:flex;gap:2rem;padding:.75rem 1.5rem;background:#000000b3;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-radius:8px;font-size:.85rem;color:#888}.control-info span{display:flex;align-items:center;gap:.5rem}.loading-spinner{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);display:flex;flex-direction:column;align-items:center;gap:1rem;color:#888;z-index:100}.spinner{width:40px;height:40px;border:3px solid #333;border-top-color:#667eea;border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.error-message{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);background:#dc2626e6;padding:1.5rem 2rem;border-radius:8px;color:#fff;text-align:center;z-index:100;max-width:80%}.error-message p{margin:0;font-size:1rem}@media (max-width: 768px){.viewer-header{padding:.8rem 1rem}.file-name{font-size:.85rem;max-width:calc(100% - 60px);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.file-format{padding:.2rem .5rem;font-size:.7rem}.viewer-controls{bottom:.5rem;left:.5rem;right:.5rem}.control-info{gap:1rem;padding:.5rem 1rem;font-size:.75rem}.spinner{width:35px;height:35px}}@media (max-width: 480px){.viewer-header{padding:.6rem .8rem}.file-name{font-size:.8rem}.file-format{padding:.15rem .4rem;font-size:.65rem}.control-info{flex-wrap:wrap;justify-content:center;gap:.5rem;padding:.5rem .8rem;font-size:.7rem}.control-info span{font-size:.65rem}.spinner{width:30px;height:30px;border-width:2px}.error-message{padding:1rem 1.5rem;max-width:90%}.error-message p{font-size:.9rem}}@media (hover: none) and (pointer: coarse){.control-info{background:#000000d9}}.file-list{padding:0 1.5rem 1.5rem;display:flex;flex-direction:column}.file-list-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem}.file-list-header h3{font-size:1.1rem;color:#fff}.header-actions{display:flex;align-items:center;gap:.5rem}.clear-btn{background:transparent;border:none;color:#888;cursor:pointer;font-size:.85rem;padding:.4rem .6rem;border-radius:4px;transition:all .3s}.clear-btn:hover{color:#fca5a5;background:#fca5a51a}.refresh-btn{background:transparent;border:none;color:#888;cursor:pointer;font-size:1.2rem;padding:.5rem;transition:color .3s}.refresh-btn:hover{color:#667eea;transform:rotate(180deg)}.files{flex:1;overflow-y:auto;overflow-x:hidden;-webkit-overflow-scrolling:touch}.file-item{display:flex;justify-content:space-between;align-items:center;padding:.75rem 1rem;background:#222;border-radius:6px;margin-bottom:.5rem;cursor:pointer;transition:all .2s;border:1px solid transparent}.file-item:hover{background:#2a2a2a;border-color:#444}.file-item.active{background:#667eea1a;border-color:#667eea}.file-item.demo-file{background:#667eea0d;border:1px solid rgba(102,126,234,.3)}.demo-badge{display:inline-block;background:#667eea;color:#fff;font-size:.7rem;padding:.1rem .4rem;border-radius:3px;margin-left:.5rem;vertical-align:middle}.file-info{flex:1;min-width:0}.file-name{font-size:.9rem;color:#fff;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.file-meta{font-size:.75rem;color:#666;margin-top:.25rem}.delete-btn{background:transparent;border:none;color:#666;cursor:pointer;font-size:1rem;padding:.25rem;margin-left:.5rem;transition:all .2s}.delete-btn:hover{color:#fca5a5}.loading,.empty,.error-message{text-align:center;padding:2rem 1rem;color:#666;font-size:.9rem}.error-message{color:#fca5a5}.files::-webkit-scrollbar{width:4px}.files::-webkit-scrollbar-track{background:transparent}.files::-webkit-scrollbar-thumb{background:#333;border-radius:2px}.files::-webkit-scrollbar-thumb:hover{background:#444}@media (max-width: 768px){.file-list{padding:0 1rem 1rem;flex:0 0 auto}.file-list-header h3{font-size:1rem}.file-item{padding:.6rem .8rem}.file-name{font-size:.85rem}.file-meta{font-size:.7rem}.delete-btn{font-size:.9rem;padding:.2rem}}@media (max-width: 480px){.file-list{padding:0 .8rem .8rem;flex:0 0 auto}.file-list-header h3{font-size:.95rem}.file-item{padding:.5rem .6rem;flex-wrap:wrap}.file-name{font-size:.8rem;max-width:calc(100% - 40px)}.file-meta{font-size:.65rem;margin-top:.2rem}.delete-btn{font-size:1rem;padding:.25rem .5rem}}.app{width:100%;height:100%;display:flex;flex-direction:column;background:#0a0a0a}.app-header{padding:1.5rem 2rem;background:linear-gradient(135deg,#667eea,#764ba2);box-shadow:0 2px 10px #0000004d;flex-shrink:0}.app-header h1{font-size:1.8rem;font-weight:700;margin-bottom:.5rem}.subtitle{font-size:.9rem;opacity:.9;font-weight:300}.app-main{flex:1;display:flex;overflow:hidden;position:relative}.sidebar{width:320px;background:#1a1a1a;border-right:1px solid #333;display:flex;flex-direction:column;overflow-y:auto;flex-shrink:0;transition:transform .3s ease}.divider{height:1px;background:#333;margin:1.5rem 1rem}.viewer-container{flex:1;position:relative;overflow:hidden}@media (max-width: 768px){.app-header{padding:1rem 1.5rem;flex-shrink:0}.app-header h1{font-size:1.4rem}.subtitle{font-size:.8rem}.app-main{flex-direction:column;flex-wrap:nowrap;overflow:hidden}.viewer-container{width:100%;height:55vh;min-height:55vh;max-height:55vh;flex-shrink:0;order:1}.sidebar{width:100%;height:45vh;max-height:45vh;min-height:45vh;order:2;border-right:none;border-top:1px solid #333;overflow-y:auto;overflow-x:hidden}.file-uploader{padding:1rem;flex:0 0 auto}.file-list{padding:0 1rem 1rem}.three-viewer,.viewer-canvas{height:100%}}@media (max-width: 480px){.app-header{padding:.8rem 1rem;flex-shrink:0}.app-header h1{font-size:1.2rem}.subtitle{font-size:.75rem;display:none}.viewer-container{height:50vh;min-height:50vh;max-height:50vh;flex-shrink:0}.sidebar{height:50vh;max-height:50vh;min-height:50vh;overflow-y:auto;overflow-x:hidden}.file-uploader{padding:.8rem;flex:0 0 auto}.upload-zone{padding:1.5rem .8rem}.upload-icon{font-size:2rem}.upload-text{font-size:.9rem}.upload-hint{font-size:.75rem}.placeholder h2{font-size:1.2rem}.placeholder p{font-size:.9rem}.note{padding:.8rem 1rem;font-size:.85rem}}.placeholder{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;color:#666}.placeholder-icon{font-size:4rem;margin-bottom:1.5rem;opacity:.5}.placeholder h2{font-size:1.5rem;margin-bottom:1rem;color:#888}.placeholder p{font-size:1rem;margin-bottom:.5rem}.note{margin-top:2rem;padding:1rem 1.5rem;background:#1a1a1a;border-radius:8px;border-left:4px solid #667eea}.note-label{font-weight:600;color:#667eea}.sidebar::-webkit-scrollbar{width:6px}.sidebar::-webkit-scrollbar-track{background:#1a1a1a}.sidebar::-webkit-scrollbar-thumb{background:#333;border-radius:3px}.sidebar::-webkit-scrollbar-thumb:hover{background:#444}*{margin:0;padding:0;box-sizing:border-box}html,body,#root{width:100%;height:100%}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background:#0a0a0a;color:#fff;overflow:hidden}code{font-family:source-code-pro,Menlo,Monaco,Consolas,Courier New,monospace}