:root{--bg-primary: #0d1117;--bg-secondary: #161b22;--bg-tertiary: #1c2128;--bg-hover: #21262d;--bg-active: #2d333b;--border-color: #30363d;--border-hover: #484f58;--text-primary: #e6edf3;--text-secondary: #7d8590;--text-tertiary: #484f58;--accent-blue: #58a6ff;--accent-green: #3fb950;--accent-red: #f85149;--accent-orange: #db6d28;--accent-purple: #bc8cff;--shadow: 0 8px 24px rgba(0, 0, 0, .4);--shadow-sm: 0 2px 8px rgba(0, 0, 0, .3);--transition: all .2s ease}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Helvetica,Arial,sans-serif;background:var(--bg-primary);color:var(--text-primary);overflow:hidden;height:100vh}.container{display:flex;height:100vh;overflow:hidden}.sidebar{width:260px;background:var(--bg-secondary);border-right:1px solid var(--border-color);display:flex;flex-direction:column;padding:16px;overflow-y:auto}.sidebar-header{display:flex;align-items:center;gap:12px;margin-bottom:24px;padding-bottom:16px;border-bottom:1px solid var(--border-color)}.sidebar-header i{font-size:24px;color:var(--accent-blue)}.sidebar-header h2{font-size:18px;font-weight:600}.sidebar-section{margin-bottom:24px}.sidebar-title{font-size:12px;font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.5px;margin-bottom:8px;padding:0 8px}.sidebar-item{display:flex;align-items:center;gap:12px;padding:10px 12px;border-radius:6px;cursor:pointer;transition:var(--transition);margin-bottom:4px;color:var(--text-primary);text-decoration:none}.sidebar-item:hover{background:var(--bg-hover);color:var(--text-primary);text-decoration:none}.sidebar-item.active{background:var(--bg-active);color:var(--accent-blue)}.sidebar-item i{width:16px;font-size:16px}.sidebar-item span{font-size:14px}.sidebar-item .badge{margin-left:auto;padding:2px 6px;font-size:11px;font-weight:600;border-radius:10px;min-width:20px;text-align:center}.badge-primary{background:var(--accent-blue);color:#fff}.badge-warning{background:#d29922;color:#fff}.storage-info{margin-top:auto;padding:16px;background:var(--bg-tertiary);border-radius:6px;border:1px solid var(--border-color)}.storage-header{display:flex;justify-content:space-between;margin-bottom:8px;font-size:12px}.storage-usage{color:var(--text-secondary)}.storage-bar{height:8px;background:var(--bg-hover);border-radius:4px;overflow:hidden}.storage-fill{height:100%;background:linear-gradient(90deg,var(--accent-blue),var(--accent-purple));border-radius:4px;transition:width .3s ease}.main-content{flex:1;display:flex;flex-direction:column;overflow-y:auto;overflow-x:hidden}.toolbar{display:flex;align-items:center;justify-content:space-between;padding:12px 20px;background:var(--bg-secondary);border-bottom:1px solid var(--border-color);gap:16px}.toolbar-left{display:flex;align-items:center;gap:8px;flex:1}.toolbar-right{display:flex;align-items:center;gap:12px}.btn-icon{background:transparent;border:1px solid var(--border-color);color:var(--text-primary);width:36px;height:36px;border-radius:6px;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:var(--transition)}.btn-icon:hover{background:var(--bg-hover);border-color:var(--border-hover)}.btn-icon.active{background:var(--bg-active);color:var(--accent-blue);border-color:var(--accent-blue)}.breadcrumb{display:flex;align-items:center;gap:8px;margin-left:12px;padding-left:12px;border-left:1px solid var(--border-color)}.breadcrumb-item{font-size:14px;color:var(--text-secondary);cursor:pointer;transition:var(--transition)}.breadcrumb-item:hover{color:var(--accent-blue)}.breadcrumb-item.active{color:var(--text-primary);font-weight:500}.breadcrumb-item:not(:last-child):after{content:"/";margin-left:8px;color:var(--text-tertiary)}.search-box{display:flex;align-items:center;gap:8px;background:var(--bg-tertiary);border:1px solid var(--border-color);border-radius:6px;padding:8px 12px;min-width:250px;transition:var(--transition)}.search-box:focus-within{border-color:var(--accent-blue);box-shadow:0 0 0 3px #58a6ff1a}.search-box i{color:var(--text-secondary);font-size:14px}.search-box input{background:transparent;border:none;outline:none;color:var(--text-primary);font-size:14px;flex:1}.search-box input::-moz-placeholder{color:var(--text-secondary)}.search-box input::placeholder{color:var(--text-secondary)}.view-toggle{display:flex;gap:4px}.action-bar{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;background:var(--bg-secondary);border-bottom:1px solid var(--border-color)}.action-bar-left,.action-bar-right{display:flex;gap:8px}.btn-primary,.btn-secondary,.btn-danger{padding:8px 16px;border-radius:6px;font-size:14px;font-weight:500;cursor:pointer;transition:var(--transition);display:flex;align-items:center;gap:8px;border:1px solid}.btn-primary{background:var(--accent-blue);border-color:var(--accent-blue);color:var(--bg-primary)}.btn-primary:hover{background:#4a96e6;border-color:#4a96e6}.btn-secondary{background:var(--bg-tertiary);border-color:var(--border-color);color:var(--text-primary)}.btn-secondary:hover{background:var(--bg-hover);border-color:var(--border-hover)}.btn-danger{background:transparent;border-color:var(--accent-red);color:var(--accent-red)}.btn-danger:hover{background:#f851491a}.sort-select{background:var(--bg-tertiary);border:1px solid var(--border-color);color:var(--text-primary);padding:8px 12px;border-radius:6px;font-size:14px;cursor:pointer;outline:none;transition:var(--transition)}.sort-select:hover{border-color:var(--border-hover)}.sort-select:focus{border-color:var(--accent-blue)}.file-grid{flex:1;padding:20px;overflow-y:auto;display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:16px;align-content:start}.file-item{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:8px;padding:16px;cursor:pointer;transition:var(--transition);display:flex;flex-direction:column;align-items:center;gap:12px;position:relative;-webkit-user-select:none;-moz-user-select:none;user-select:none}.file-item:hover{background:var(--bg-hover);border-color:var(--border-hover);transform:translateY(-2px)}.file-item.selected{background:var(--bg-active);border-color:var(--accent-blue)}.file-checkbox{position:absolute;top:8px;left:8px;width:20px;height:20px;background:var(--bg-tertiary);border:2px solid var(--border-color);border-radius:4px;cursor:pointer;transition:var(--transition);display:flex;align-items:center;justify-content:center;z-index:10}.file-checkbox:hover{border-color:var(--accent-blue);background:var(--bg-hover)}.file-item.selected .file-checkbox{background:var(--accent-blue);border-color:var(--accent-blue)}.file-checkbox i{font-size:12px;color:var(--bg-primary);display:none}.file-item.selected .file-checkbox i{display:block}.file-icon{font-size:48px;color:var(--text-secondary)}.file-icon.folder{color:var(--accent-blue)}.file-icon.image{color:var(--accent-green)}.file-icon.video{color:var(--accent-purple)}.file-icon.audio{color:var(--accent-orange)}.file-icon.document{color:var(--accent-blue)}.file-icon.archive{color:var(--text-secondary)}.file-info{text-align:center;width:100%}.file-name{font-size:13px;font-weight:500;color:var(--text-primary);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;margin-bottom:4px}.file-meta{font-size:11px;color:var(--text-secondary);display:flex;justify-content:center;gap:8px}.file-grid.list-view{display:flex;flex-direction:column;gap:0}.file-grid.list-view .file-item{flex-direction:row;padding:12px 16px 12px 40px;border-radius:0;border-left:none;border-right:none;border-top:none}.file-grid.list-view .file-item:first-child{border-top:1px solid var(--border-color);border-radius:8px 8px 0 0}.file-grid.list-view .file-item:last-child{border-radius:0 0 8px 8px}.file-grid.list-view .file-icon{font-size:24px}.file-grid.list-view .file-info{text-align:left;flex:1;display:flex;align-items:center;justify-content:space-between}.file-grid.list-view .file-name{flex:1}.file-grid.list-view .file-meta{gap:16px}.file-grid.list-view .file-checkbox{left:12px}.file-item.has-versions{padding-left:40px}.version-toggle{position:absolute;left:12px;top:50%;transform:translateY(-50%);width:20px;height:20px;background:transparent;border:none;color:var(--text-secondary);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:var(--transition);z-index:5}.version-toggle:hover{color:var(--accent-blue)}.version-toggle i{font-size:12px;transition:transform .2s ease}.version-toggle.expanded i{transform:rotate(90deg)}.version-badge{display:inline-flex;align-items:center;gap:4px;background:var(--bg-tertiary);border:1px solid var(--border-color);padding:2px 6px;border-radius:4px;font-size:10px;color:var(--text-secondary);margin-left:6px;vertical-align:middle}.version-badge i{font-size:9px}.version-list{background:var(--bg-tertiary);border:1px solid var(--border-color);border-radius:6px;margin:-8px 0 8px 48px;padding:8px}.version-loading{padding:12px;text-align:center;color:var(--text-secondary);font-size:12px}.version-item{display:flex;align-items:center;gap:12px;padding:8px 12px;background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:4px;margin-bottom:6px;transition:var(--transition);cursor:pointer}.version-item:last-child{margin-bottom:0}.version-item:hover{background:var(--bg-hover);border-color:var(--border-hover)}.version-item.current-version{border-color:var(--accent-blue);background:#58a6ff1a}.version-icon{width:32px;height:32px;display:flex;align-items:center;justify-content:center;background:var(--bg-tertiary);border-radius:4px;color:var(--text-secondary)}.version-info{flex:1;min-width:0}.version-name{font-size:12px;font-weight:500;color:var(--text-primary);display:flex;align-items:center;gap:6px}.version-current-badge{background:var(--accent-blue);color:var(--bg-primary);padding:1px 6px;border-radius:3px;font-size:9px;font-weight:600;text-transform:uppercase}.version-meta{font-size:10px;color:var(--text-secondary);margin-top:2px;display:flex;gap:8px}.version-actions{display:flex;gap:6px}.version-action{background:transparent;border:1px solid var(--border-color);color:var(--text-secondary);padding:4px 8px;border-radius:4px;font-size:11px;cursor:pointer;transition:var(--transition)}.version-action:hover{background:var(--bg-hover);border-color:var(--accent-blue);color:var(--accent-blue)}.version-action i{font-size:10px}.file-grid.list-view .file-item.has-versions{padding-left:52px}.file-grid.list-view .version-toggle{left:24px}.file-grid.list-view .version-list{margin-left:64px}.context-menu{position:fixed;background:var(--bg-tertiary);border:1px solid var(--border-color);border-radius:8px;box-shadow:var(--shadow);min-width:220px;padding:6px;z-index:1000;display:none}.context-menu.show{display:block}.context-menu-item{display:flex;align-items:center;gap:12px;padding:10px 12px;border-radius:6px;cursor:pointer;font-size:14px;transition:var(--transition)}.context-menu-item:hover{background:var(--bg-hover)}.context-menu-item i{width:16px;font-size:14px;color:var(--text-secondary)}.context-menu-item.danger{color:var(--accent-red)}.context-menu-item.danger:hover{background:#f851491a}.context-menu-item.danger i{color:var(--accent-red)}.context-menu-divider{height:1px;background:var(--border-color);margin:6px 0}.selection-bar{position:fixed;bottom:20px;left:50%;transform:translate(-50%) translateY(100px);background:var(--bg-tertiary);border:1px solid var(--border-color);border-radius:12px;padding:12px 20px;box-shadow:var(--shadow);display:flex;align-items:center;gap:20px;opacity:0;transition:all .3s ease;z-index:100}.selection-bar.show{transform:translate(-50%) translateY(0);opacity:1}.selection-info{font-size:14px;font-weight:500;padding-right:20px;border-right:1px solid var(--border-color)}.selection-actions{display:flex;gap:8px}.modal{position:fixed;top:0;left:0;width:100%;height:100%;background:#000000b3;display:none;align-items:center;justify-content:center;z-index:2000}.modal.show{display:flex}.modal-content{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:12px;width:90%;max-width:600px;max-height:80vh;overflow:hidden;box-shadow:var(--shadow)}.modal-content.small{max-width:400px}.modal-header{padding:20px;border-bottom:1px solid var(--border-color);display:flex;align-items:center;justify-content:space-between}.modal-header h3{font-size:18px;font-weight:600}.modal-close{background:transparent;border:none;color:var(--text-secondary);font-size:24px;cursor:pointer;width:32px;height:32px;display:flex;align-items:center;justify-content:center;border-radius:6px;transition:var(--transition)}.modal-close:hover{background:var(--bg-hover);color:var(--text-primary)}.modal-body{padding:20px;overflow-y:auto;max-height:calc(80vh - 140px)}.modal-footer{padding:16px 20px;border-top:1px solid var(--border-color);display:flex;gap:12px;justify-content:flex-end;background:var(--bg-primary)}.modal-input{width:100%;background:var(--bg-tertiary);border:1px solid var(--border-color);color:var(--text-primary);padding:10px 12px;border-radius:6px;font-size:14px;outline:none;transition:var(--transition)}.modal-input:focus{border-color:var(--accent-blue);box-shadow:0 0 0 3px #58a6ff1a}.modal-actions{display:flex;gap:8px;margin-top:16px;justify-content:flex-end}.properties-list{margin:0;padding:0;list-style:none}.property-item{display:flex;align-items:center;padding:14px 16px;background:var(--bg-tertiary);border:1px solid var(--border-color);border-bottom:none;transition:var(--transition)}.property-item:first-child{border-radius:8px 8px 0 0}.property-item:last-child{border-bottom:1px solid var(--border-color);border-radius:0 0 8px 8px}.property-item:only-child{border-radius:8px;border-bottom:1px solid var(--border-color)}.property-item:hover{background:var(--bg-hover)}.property-label{font-weight:600;font-size:13px;color:var(--text-secondary);min-width:120px;text-transform:uppercase;letter-spacing:.5px}.property-value{color:var(--text-primary);font-size:14px;flex:1;word-break:break-all}.property-icon{margin-right:12px;color:var(--accent-blue);font-size:16px;width:20px;text-align:center}.share-links{display:flex;flex-direction:column;gap:20px}.share-link-group label{display:block;font-size:13px;font-weight:500;color:var(--text-secondary);margin-bottom:8px}.link-input-group{display:flex;gap:8px}.link-input-group .modal-input{flex:1}.toast{position:fixed;bottom:20px;right:20px;background:var(--bg-tertiary);border:1px solid var(--border-color);border-radius:8px;padding:14px 18px;display:flex;align-items:center;gap:12px;box-shadow:var(--shadow);transform:translate(400px);transition:transform .3s ease;z-index:3000}.toast.show{transform:translate(0)}.toast i{color:var(--accent-green);font-size:18px}.toast span{font-size:14px}::-webkit-scrollbar{width:12px;height:12px}::-webkit-scrollbar-track{background:var(--bg-secondary)}::-webkit-scrollbar-thumb{background:var(--bg-hover);border-radius:6px;border:2px solid var(--bg-secondary)}::-webkit-scrollbar-thumb:hover{background:var(--text-tertiary)}@keyframes fadeIn{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}.file-item{animation:fadeIn .3s ease}.empty-folder{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:100px 20px;color:var(--text-secondary);grid-column:1 / -1}.empty-folder i{font-size:72px;margin-bottom:20px;opacity:.3;color:var(--text-tertiary)}.empty-folder h3{font-size:20px;margin-bottom:8px;color:var(--text-primary);font-weight:600}.empty-folder p{font-size:14px;margin-bottom:24px;text-align:center}.empty-actions{display:flex;gap:12px;flex-wrap:wrap;justify-content:center}.empty-actions .btn-primary,.empty-actions .btn-secondary{padding:8px 14px;font-size:13px}.empty-actions .btn-primary i,.empty-actions .btn-secondary i{font-size:12px}.folder-stats{display:flex;gap:20px;padding:12px 20px;background:var(--bg-tertiary);border-bottom:1px solid var(--border-color);font-size:13px;color:var(--text-secondary)}.folder-stat-item{display:flex;align-items:center;gap:8px}.folder-stat-item i{color:var(--accent-blue)}.folder-stat-item strong{color:var(--text-primary)}@media (max-width: 768px){.sidebar{width:80px}.sidebar-header h2,.sidebar-item span,.sidebar-title,.storage-info,.breadcrumb{display:none}.search-box{min-width:150px}.file-grid{grid-template-columns:repeat(auto-fill,minmax(100px,1fr));gap:12px}.folder-stats{flex-wrap:wrap;gap:12px}.empty-actions{flex-direction:column;width:100%;max-width:300px}}.folder-tree{max-height:400px;overflow-y:auto;border:1px solid var(--border-color);border-radius:8px;padding:12px;background:var(--bg-primary);margin-bottom:20px}.folder-tree-item{padding:10px 12px;margin-bottom:4px;border-radius:6px;cursor:pointer;display:flex;align-items:center;gap:8px;transition:var(--transition);-webkit-user-select:none;-moz-user-select:none;user-select:none}.folder-tree-item:hover{background:var(--bg-hover)}.folder-tree-item.selected{background:var(--accent-blue);color:var(--bg-primary)}.folder-tree-item.disabled{opacity:.5;cursor:not-allowed;pointer-events:none}.folder-tree-item.indent-1{padding-left:32px}.folder-tree-item.indent-2{padding-left:52px}.folder-tree-item.indent-3{padding-left:72px}.folder-tree-item.indent-4{padding-left:92px}.folder-tree-item i{font-size:16px;color:var(--accent-blue)}.folder-tree-item.selected i{color:var(--bg-primary)}.folder-tree-item .folder-path{font-size:12px;opacity:.7;margin-left:auto}