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video{width:100%;height:100%;max-height:100%;object-fit:contain}.preview-pdf-container{width:100%;height:100%;background-color:#fff}.preview-pdf-container iframe{width:100%;height:100%;border:none}.preview-text-container{width:100%;height:100%;padding:24px;overflow:auto;background-color:#1a1a1a;color:#e3e3e3;text-align:left}.preview-text-container pre{font-family:Courier New,Courier,monospace;font-size:13px;line-height:1.6;white-space:pre-wrap}.preview-loading{display:flex;flex-direction:column;justify-content:center;align-items:center;gap:12px;color:#fff}.preview-fallback{display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;color:#bac4cc;padding:40px}.preview-fallback h3{color:#fff;font-size:18px;margin-top:16px;margin-bottom:8px;font-weight:500}.preview-fallback p{font-size:14px;max-width:320px;line-height:1.5}.files-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:20px;padding:24px;background-color:var(--color-bg-card)}.grid-item-card{display:flex;flex-direction:column;background-color:var(--color-bg-card);border:1px solid var(--color-border);border-radius:var(--border-radius);padding:12px;cursor:pointer;transition:all .15s ease;position:relative}.grid-item-card:hover{border-color:#bac4cc;box-shadow:var(--box-shadow);background-color:var(--color-hover)}.grid-thumbnail-container{width:100%;height:120px;background-color:var(--color-bg-body);border-radius:var(--border-radius);overflow:hidden;display:flex;align-items:center;justify-content:center;position:relative;margin-bottom:10px}.grid-thumbnail-container img{width:100%;height:100%;object-fit:cover}.grid-icon-fallback{color:var(--color-text-secondary)}.grid-play-overlay{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:44px;height:44px;background-color:#1e1f2199;border-radius:50%;display:flex;align-items:center;justify-content:center;pointer-events:none;transition:background-color .15s ease}.grid-item-card:hover .grid-play-overlay{background-color:#0061fed9}.grid-item-info{display:flex;flex-direction:column;margin-bottom:8px;flex-grow:1}.grid-item-name{font-size:13px;font-weight:500;color:var(--color-text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:100%}.grid-item-size{font-size:11px;color:var(--color-text-secondary);margin-top:2px}.grid-item-actions{display:flex;align-items:center;justify-content:flex-end;gap:6px;border-top:1px solid var(--color-border);padding-top:8px}.view-mode-toggle button.active{background-color:var(--color-hover)!important;color:var(--color-primary)!important;border-color:#bac4cc!important}@media (max-width: 900px){.app-layout{flex-direction:column}.sidebar{width:100%;height:200px;border-right:none;border-bottom:1px solid var(--color-border)}.toolbar{flex-direction:column;align-items:stretch;gap:12px}.toolbar-actions{flex-direction:column;align-items:stretch}.url-upload-form input{width:100%}}[data-theme=dark]{--color-primary: #3b82f6;--color-primary-hover: #60a5fa;--color-primary-light: rgba(59, 130, 246, .15);--color-text-primary: #f3f4f6;--color-text-secondary: #9ca3af;--color-bg-body: #0b0f19;--color-bg-card: #111827;--color-border: #1f2937;--color-hover: #1f2937;--color-active: rgba(59, 130, 246, .2);--color-danger-light: rgba(239, 68, 68, .1);--color-success-light: rgba(16, 185, 129, .1)}.sub-toolbar{display:flex;align-items:center;justify-content:space-between;padding:12px 24px;border-bottom:1px solid 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ease}.sub-toolbar-btn:hover{background-color:var(--color-hover)}.sub-toolbar-btn.active{background-color:var(--color-primary-light);color:var(--color-primary);border-color:var(--color-primary)}.folder-item-btn{position:relative}.pin-btn{opacity:0;background:none;border:none;color:var(--color-text-secondary);cursor:pointer;padding:4px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;transition:all .15s ease;margin-left:auto}.folder-item-btn:hover .pin-btn,.folder-item-btn.active .pin-btn,.pin-btn.pinned{opacity:1}.pin-btn.pinned{color:#f59e0b}.pin-btn:hover{background-color:var(--color-hover)}.file-checkbox-wrapper{display:flex;align-items:center;justify-content:center;margin-right:12px}.file-checkbox{width:16px;height:16px;cursor:pointer;accent-color:var(--color-primary)}.grid-checkbox-wrapper{position:absolute;top:10px;left:10px;z-index:10;background-color:var(--color-bg-card);padding:4px;border-radius:var(--border-radius);border:1px solid var(--color-border);display:flex;align-items:center;justify-content:center;box-shadow:var(--box-shadow)}.multi-select-bar{position:fixed;bottom:24px;left:55%;transform:translate(-50%);background-color:var(--color-bg-card);border:1px solid var(--color-border);border-radius:8px;padding:12px 24px;display:flex;align-items:center;gap:20px;box-shadow:0 10px 15px -3px #00000026,0 4px 6px -2px #0000001a;z-index:100;animation:slideUp .2s cubic-bezier(.16,1,.3,1)}@keyframes slideUp{0%{transform:translate(-50%,100px);opacity:0}to{transform:translate(-50%);opacity:1}}.multi-select-bar span{font-size:14px;font-weight:500;color:var(--color-text-primary)}.zoom-controls{display:flex;align-items:center;gap:8px;background-color:#1e1f21d9;padding:6px 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8px;border-radius:12px;margin-left:8px;display:inline-flex;align-items:center}.theme-toggle-btn{background:none;border:1px solid var(--color-border);border-radius:var(--border-radius);color:var(--color-text-secondary);cursor:pointer;display:flex;align-items:center;justify-content:center;width:34px;height:34px;transition:all .15s ease}.theme-toggle-btn:hover{background-color:var(--color-hover);color:var(--color-primary)}.url-upload-form input{background-color:var(--color-bg-card);color:var(--color-text-primary)}.grid-item-card.folder-card{border-color:#d1d5db;background-color:var(--color-hover)}[data-theme=dark] .grid-item-card.folder-card{border-color:#374151;background-color:var(--color-hover)}.folder-card .grid-thumbnail-container{background-color:var(--color-bg-card);color:#f59e0b}.crumb-separator{color:var(--color-text-secondary)}.crumb-btn{background:none;border:none;font-family:inherit;font-size:14px;color:var(--color-primary);cursor:pointer;padding:2px 4px;border-radius:var(--border-radius);transition:all .15s ease}.crumb-btn:hover{background-color:var(--color-hover);text-decoration:underline}.crumb-active-text{font-size:14px;font-weight:600;color:var(--color-text-primary);padding:2px 4px}.create-folder-bar{display:flex;align-items:center;gap:8px;border-left:1px solid var(--color-border);padding-left:12px;margin-left:4px}.create-folder-input{height:34px;padding:0 10px;border:1px solid var(--color-border);border-radius:var(--border-radius);background-color:var(--color-bg-card);color:var(--color-text-primary);font-family:inherit;font-size:13px;outline:none;width:140px;transition:all .15s ease}.create-folder-input:focus{border-color:var(--color-primary);width:180px}.share-modal-content{display:flex;flex-direction:column;gap:16px;padding:8px 0}.share-select-group{display:flex;flex-direction:column;gap:6px}.share-select-group label{font-size:12px;font-weight:600;color:var(--color-text-secondary)}.share-link-box{display:flex;gap:8px;margin-top:8px}.share-link-box input{flex-grow:1;height:36px;padding:0 12px;border:1px solid var(--color-border);border-radius:var(--border-radius);background-color:var(--color-bg-body);color:var(--color-text-primary);font-family:inherit;font-size:13px;outline:none}.qr-code-container{display:flex;flex-direction:column;align-items:center;justify-content:center;margin-top:16px;gap:8px;padding:16px;background-color:#fff;border:1px solid var(--color-border);border-radius:var(--border-radius);width:fit-content;align-self:center}.qr-code-container span{font-size:11px;color:#5b616a;font-weight:500}.btn-icon.share-btn{color:var(--color-text-secondary);transition:color .15s ease}.btn-icon.share-btn:hover{color:var(--color-primary);background-color:var(--color-hover)}