:root{--bg-primary:#ffffff;--bg-secondary:#f5f5f5;--bg-card:#ffffff;--text-primary:#1a1a1a;--text-secondary:#666666;--border-color:#e0e0e0;--accent-color:#4099de;--accent-hover:#2563eb;--shadow-sm:0 1px 3px rgba(0,0,0,.1);--shadow-md:0 4px 6px rgba(0,0,0,.1);--shadow-lg:0 10px 15px rgba(0,0,0,.1);--transition:all .3s ease;}[data-theme="dark"]{--bg-primary:#0f172a;--bg-secondary:#1e293b;--bg-card:#1e293b;--text-primary:#f1f5f9;--text-secondary:#94a3b8;--border-color:#334155;--accent-color:#4099de;--accent-hover:#60a5fa;--shadow-sm:0 1px 3px rgba(0,0,0,.3);--shadow-md:0 4px 6px rgba(0,0,0,.3);--shadow-lg:0 10px 15px rgba(0,0,0,.3);}*{margin:0;padding:0;box-sizing:border-box;}body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;background-color:var(--bg-primary);color:var(--text-primary);transition:var(--transition);line-height:1.6;}.container{max-width:1400px;margin:0 auto;padding:20px;min-height:100vh;}.header{background-color:var(--bg-card);border-radius:12px;padding:15px;margin-bottom:24px;box-shadow:var(--shadow-sm);display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:20px;border:1px solid var(--border-color);transition:var(--transition);}.header img.logo{max-height:40px;}.header-left{display:flex;align-items:center;gap:16px;}.header h1{font-size:28px;font-weight:700;color:var(--text-primary);}.file-count{margin-top:9px;padding:6px 0;font-size:14px;color:var(--text-secondary);}.header-right{display:flex;align-items:center;gap:16px;}.view-controls{display:flex;gap:8px;background-color:var(--bg-secondary);padding:4px;border-radius:8px;}.upload-btn-text{margin-left:5px;}#uploadBtnContainer .view-btn:hover{background-color:var(--accent-hover);color:white;}.view-btn{background:transparent;border:none;padding:8px 12px;border-radius:6px;cursor:pointer;color:var(--text-secondary);transition:var(--transition);display:flex;align-items:center;justify-content:center;}.view-btn:hover{background-color:var(--bg-card);color:var(--text-primary);}.view-btn.active{background-color:var(--accent-color);color:white;}.scroll-mode-toggle{display:flex;align-items:center;gap:10px;}.toggle-label{font-size:14px;color:var(--text-secondary);white-space:nowrap;}.toggle-switch{position:relative;display:inline-block;width:50px;height:26px;}.toggle-switch input{opacity:0;width:0;height:0;}.slider{position:absolute;cursor:pointer;top:0;left:0;right:0;bottom:0;background-color:var(--border-color);transition:.3s;border-radius:26px;}.slider:before{position:absolute;content:"";height:20px;width:20px;left:3px;bottom:3px;background-color:white;transition:.3s;border-radius:50%;}input:checked + .slider{background-color:var(--accent-color);}input:checked + .slider:before{transform:translateX(24px);}.theme-toggle{background-color:var(--bg-secondary);border:none;padding:10px;border-radius:8px;cursor:pointer;color:var(--text-primary);transition:var(--transition);display:flex;align-items:center;justify-content:center;}.theme-toggle:hover{background-color:var(--border-color);}.upload-btn{background-color:var(--accent-color);border:none;padding:10px 16px;border-radius:8px;cursor:pointer;color:white;transition:var(--transition);display:flex;align-items:center;justify-content:center;gap:8px;font-size:14px;font-weight:500;}.upload-btn:hover{background-color:var(--accent-hover);}.upload-btn:disabled{opacity:.7;cursor:not-allowed;}.upload-btn svg.spinning{animation:spin 1s linear infinite;}@keyframes spin{from{transform:rotate(0deg)}to{transform:rotate(360deg)}}.sun-icon{display:block;}.moon-icon{display:none;}[data-theme="dark"] .sun-icon{display:none;}[data-theme="dark"] .moon-icon{display:block;}.main-content{min-height:400px;}.file-grid{display:grid;gap:20px;margin-bottom:32px;transition:var(--transition);}.file-grid.card-view{grid-template-columns:repeat(auto-fill,minmax(240px,1fr));}.file-grid.list-view{grid-template-columns:1fr;}.file-card{background-color:var(--bg-card);border-radius:12px;padding:20px;border:1px solid var(--border-color);transition:var(--transition);cursor:pointer;animation:fadeIn .3s ease;}.file-card:hover{box-shadow:var(--shadow-md);border-color:var(--accent-color);}.card-view .file-card{display:flex;flex-direction:column;align-items:center;text-align:center;}.list-view .file-card{display:flex;flex-direction:row;align-items:center;gap:20px;text-align:left;min-width:0;}.file-thumbnail{width:100%;height:120px;display:flex;align-items:center;justify-content:center;border-radius:8px;margin-bottom:12px;flex-shrink:0;background-size:cover,36px 36px;background-position:center;background-repeat:no-repeat;}.list-view .file-thumbnail{margin-bottom:0;width:80px;height:80px;background-size:cover;background-position:center;background-repeat:no-repeat;}.file-info{flex:1;width:100%;}.file-name{font-size:16px;font-weight:600;color:var(--text-primary);margin-bottom:4px;word-break:hidden;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:100%;display:block;}.list-view .file-name{max-width:50%;min-width:0;}.file-meta{font-size:13px;color:var(--text-secondary);display:flex;flex-direction:row;justify-content:space-between;align-items:center;gap:5px;margin-top:5px;}.file-meta svg{width:18px;height:18px;}.list-view .file-meta{justify-content:flex-start;gap:20px;}.file-meta span{display:flex;align-items:center;gap:4px;}.file-actions-inline{display:none;justify-content:center;align-items:center;gap:10px;}.list-view .file-actions-inline{display:flex;gap:10px;}.pagination{display:flex;justify-content:center;align-items:center;gap:12px;padding:20px;background-color:var(--bg-card);border-radius:12px;box-shadow:var(--shadow-sm);border:1px solid var(--border-color);transition:var(--transition);}.pagination.hidden{display:none;}.pagination-btn{padding:10px 20px;background-color:var(--accent-color);color:white;border:none;border-radius:8px;cursor:pointer;font-weight:500;transition:var(--transition);}.pagination-btn:hover:not(:disabled){background-color:var(--accent-hover);}.pagination-btn:disabled{background-color:var(--border-color);color:var(--text-secondary);cursor:not-allowed;opacity:.5;}.page-numbers{display:flex;gap:8px;}.page-number{padding:8px 14px;background-color:var(--bg-secondary);border:1px solid var(--border-color);border-radius:6px;cursor:pointer;transition:var(--transition);font-weight:500;color:var(--text-primary);}.page-number:hover{background-color:var(--border-color);}.page-number.active{background-color:var(--accent-color);color:white;border-color:var(--accent-color);}.loading-indicator{text-align:center;padding:40px;color:var(--text-secondary);}.spinner{border:3px solid var(--border-color);border-top:3px solid var(--accent-color);border-radius:50%;width:40px;height:40px;animation:spin 1s linear infinite;margin:0 auto 16px;}@keyframes spin{0%{transform:rotate(0deg)}100%{transform:rotate(360deg)}}@keyframes fadeIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@media (max-width:768px){.header{flex-direction:column;align-items:stretch}.header-left,.header-right{justify-content:space-between;width:100%}.header h1{font-size:24px}.file-grid.card-view{grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:16px}.pagination{flex-wrap:wrap}.page-numbers{order:3;width:100%;justify-content:center;margin-top:8px}}@media (max-width:480px){.container{padding:12px}.header{padding:16px}.file-grid.card-view{grid-template-columns:repeat(auto-fill,minmax(140px,1fr))}.scroll-mode-toggle .toggle-label{font-size:12px}}.lightbox{position:fixed;top:0;left:0;width:100%;height:100%;z-index:1000;display:none;}.lightbox.active{display:flex;align-items:center;justify-content:center;}.lightbox-overlay{position:absolute;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,.75);backdrop-filter:blur(4px);}.lightbox-content{position:relative;background:var(--bg-card);border-radius:16px;max-width:900px;width:90%;max-height:90vh;box-shadow:var(--shadow-lg);z-index:1001;animation:slideUp .3s ease;display:flex;flex-direction:column;}@keyframes slideUp{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}.lightbox-close{position:absolute;top:16px;right:16px;background:var(--bg-secondary);border:none;width:40px;height:40px;border-radius:50%;font-size:28px;line-height:1;cursor:pointer;color:var(--text-primary);transition:var(--transition);z-index:10;display:flex;align-items:center;justify-content:center;padding-bottom:4px;}.lightbox-close:hover{background:var(--accent-color);color:white;}.lightbox-arrow{position:absolute;top:50%;transform:translateY(-50%);background:var(--bg-secondary);border:none;width:48px;height:48px;border-radius:50%;display:flex;align-items:center;justify-content:center;color:var(--text-primary);box-shadow:var(--shadow-md);cursor:pointer;transition:var(--transition);z-index:10;}.lightbox-arrow svg{pointer-events:none;}.lightbox-arrow:hover{background:var(--accent-color);color:white;}.lightbox-arrow:disabled,.lightbox-arrow[disabled]{opacity:.4;cursor:not-allowed;}.lightbox-arrow-prev{left:-60px;}.lightbox-arrow-next{right:-60px;}.lightbox-body{padding:20px;flex:1;overflow:hidden;display:flex;flex-direction:column;}.file-preview{display:flex;flex-direction:column;height:100%;overflow:hidden;}.file-preview h2{color:var(--text-primary);font-size:24px;border-bottom:2px solid var(--border-color);padding-bottom:16px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:100%;display:block;padding-right:40px;flex-shrink:0;}.max-iframe-height,.max-iframe-height figure,.max-iframe-height iframe{max-height:50vh!important;}.add-scroll{max-height:60vh!important;height:auto!important;overflow-y:auto!important;scrollbar-width:thin;}.preview-info{margin-top:10px;}.preview-info p{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:100%;display:block;}.preview-content{padding-top:20px;flex:1;overflow:hidden;}.preview-thumbnail{position:relative;max-width:100%;margin-left:auto;margin-right:auto;overflow:hidden;background:var(--bg-card);aspect-ratio:var(--media-aspect,16 / 9);max-height:60vh;flex-shrink:0;}.preview-thumbnail::after{content:'';position:absolute;inset:0;pointer-events:none;box-shadow:inset 0 0 0 1px rgba(0,0,0,.05);border-radius:inherit;}.preview-thumbnail iframe,.preview-thumbnail embed,.preview-thumbnail video{width:100%;height:100%;border:0;display:block;object-fit:contain;}.image-placeholder,.video-placeholder{text-align:center;padding:48px;background:linear-gradient(135deg,var(--bg-card) 0%,var(--bg-secondary) 100%);border-radius:8px;}.image-icon,.video-icon{font-size:72px;margin-bottom:16px;}.image-desc,.video-desc{font-size:18px;color:var(--text-primary);margin-bottom:16px;font-weight:500;}.image-details,.video-details{display:flex;gap:24px;justify-content:center;flex-wrap:wrap;color:var(--text-secondary);font-size:14px;}.spreadsheet-preview table{width:100%;border-collapse:collapse;background:white;border-radius:8px;overflow:hidden;}.spreadsheet-preview th,.spreadsheet-preview td{padding:12px;text-align:left;border-bottom:1px solid #e0e0e0;color:#1a1a1a;}.spreadsheet-preview th{background:#f5f5f5;font-weight:600;}.spreadsheet-preview .positive{color:#22c55e;font-weight:600;}.spreadsheet-preview .negative{color:#ef4444;font-weight:600;}.archive-preview{color:var(--text-primary);}.archive-list{list-style:none;margin:16px 0;padding:0;}.archive-list li{padding:8px 12px;background:var(--bg-card);margin-bottom:8px;border-radius:6px;border:1px solid var(--border-color);}.archive-info{margin-top:16px;font-style:italic;color:var(--text-secondary);}.text-preview pre{background:white;padding:24px;border-radius:8px;color:#1a1a1a;overflow-x:auto;font-family:'Monaco','Courier New',monospace;font-size:14px;line-height:1.6;}.file-actions{margin-top:20px;display:flex;gap:12px;justify-content:center;flex-wrap:wrap;width:100%;}.action-btn{text-decoration:none;min-width:0;display:flex;align-items:center;justify-content:center;gap:8px;padding:10px 15px;background:var(--accent-color);color:white;border:none;border-radius:8px;font-size:14px;cursor:pointer;transition:var(--transition);font-weight:500;}.action-btn:hover{background:var(--accent-hover);box-shadow:var(--shadow-md);}@media (max-width:768px){.lightbox-content{width:95%;max-height:95vh;max-width:100%}.lightbox-body{padding:16px}.lightbox-close{width:44px;height:44px;font-size:32px;top:12px;right:12px}.lightbox-arrow{width:44px;height:44px}.lightbox-arrow svg{width:18px;height:18px}.lightbox-arrow-prev{left:8px}.lightbox-arrow-next{right:8px}.file-preview h2{font-size:18px}.preview-content{padding:12px}.preview-info{font-size:14px}.image-icon,.video-icon{font-size:56px}.file-actions{flex-direction:column;gap:8px}.action-btn{width:100%;font-size:14px;padding:12px 16px}}@media (max-width:480px){.lightbox-content{width:100%;height:auto;max-height:90vh;border-radius:12px;margin:auto}.lightbox-body{padding:12px;max-height:85vh}.lightbox-close{width:40px;height:40px;font-size:28px;top:8px;right:8px}.lightbox-arrow{width:40px;height:40px}.lightbox-arrow svg{width:16px;height:16px}.lightbox-arrow-prev{left:4px}.lightbox-arrow-next{right:4px}.file-preview h2{font-size:16px;padding-right:40px;padding-bottom:12px}.preview-content{padding:8px}.preview-thumbnail{max-height:50vh!important;max-width:90vw!important}.max-iframe-height,.max-iframe-height figure,.max-iframe-height iframe{max-height:50vh!important;height:auto!important}.add-scroll{max-height:50vh!important;height:auto!important;overflow-y:auto!important}.preview-info{font-size:13px}.preview-info p{margin:4px 0}.file-actions{margin-top:12px}.action-btn{font-size:13px;padding:10px 14px}.action-btn svg{width:16px;height:16px}}.dropzone-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background-color:rgba(64,153,222,.1);backdrop-filter:blur(4px);z-index:10000;display:flex;align-items:center;justify-content:center;opacity:0;pointer-events:none;transition:opacity .2s ease;}.dropzone-overlay.active{opacity:1;pointer-events:all;}.dropzone-content{background-color:var(--bg-card);border:3px dashed var(--accent-color);border-radius:12px;padding:48px 64px;text-align:center;box-shadow:var(--shadow-lg);color:var(--text-primary);}.dropzone-content svg{color:var(--accent-color);margin-bottom:16px;}.dropzone-content p{font-size:18px;font-weight:500;margin:0;color:var(--text-primary);}