:root{--primary-color: #0082c9;--primary-light: #00a2ff;--secondary-color: #ff6600;--secondary-light: #ff8533;--header-bg: #ffffff;--content-bg: #f8fafc;--sidebar-bg: #ffffff;--border-color: #e2e8f0;--hover-bg: #f1f5f9;--active-bg: #e2e8f0;--text-color: #1e293b;--text-secondary: #64748b;--folder-color: #0082c9;--image-color: #10b981;--document-color: #ef4444;--spreadsheet-color: #22c55e;--presentation-color: #f59e0b;--video-color: #8b5cf6;--audio-color: #ec4899;--archive-color: #6b7280;--shadow: 0 1px 3px 0 rgb(0 0 0 / .1), 0 1px 2px -1px rgb(0 0 0 / .1);--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .1), 0 4px 6px -4px rgb(0 0 0 / .1);--btn-primary-bg: #0082c9;--btn-primary-text: #ffffff;--btn-secondary-bg: #f1f5f9;--btn-secondary-text: #475569;--error-color: #ef4444;--success-color: #22c55e}[data-theme=dark]{--primary-color: #0ea5e9;--primary-light: #38bdf8;--secondary-color: #f97316;--secondary-light: #fb923c;--header-bg: #1e293b;--content-bg: #0f172a;--sidebar-bg: #1e293b;--border-color: #334155;--hover-bg: #334155;--active-bg: #475569;--text-color: #f8fafc;--text-secondary: #94a3b8;--folder-color: #0ea5e9;--image-color: #10b981;--document-color: #ef4444;--spreadsheet-color: #22c55e;--presentation-color: #f59e0b;--video-color: #8b5cf6;--audio-color: #ec4899;--archive-color: #9ca3af;--shadow: 0 1px 3px 0 rgb(0 0 0 / .3), 0 1px 2px -1px rgb(0 0 0 / .3);--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .3), 0 4px 6px -4px rgb(0 0 0 / .3);--btn-primary-bg: #0ea5e9;--btn-primary-text: #ffffff;--btn-secondary-bg: #334155;--btn-secondary-text: #e2e8f0}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background-color:var(--content-bg);color:var(--text-color);font-size:14px;line-height:1.5;transition:background-color .3s ease,color .3s ease}.app-container{display:flex;flex-direction:column;height:100vh;width:100vw;overflow:hidden}.header{height:60px;background-color:var(--header-bg);display:flex;align-items:center;justify-content:space-between;padding:0 20px;border-bottom:1px solid var(--border-color);transition:all .3s ease;z-index:10;margin-left:3rem;position:fixed;top:0;left:0;right:0}.header-left{display:flex;align-items:center;gap:12px}.logo{display:flex;align-items:center;width:2rem;height:2rem;color:var(--primary-color);font-size:1.5rem}.brand{font-size:20px;font-weight:700;letter-spacing:-.025em}.brand-name{color:var(--primary-color)}.brand-highlight{color:var(--secondary-color)}.header-right{display:flex;align-items:center;gap:8px}.icon-btn{width:50px;height:50px;display:flex;align-items:center;justify-content:center;border-radius:8px;color:#6b7280;transition:all .2s ease;cursor:pointer;border:none;background:none;position:relative}.icon-btn:hover{background-color:var(--hover-bg);color:var(--text-color)}.notification-btn{position:relative}.notification-badge{position:absolute;top:8px;right:8px;width:18px;height:18px;background-color:var(--secondary-color);color:#fff;border-radius:50%;font-size:11px;display:flex;align-items:center;justify-content:center;font-weight:600;border:2px solid var(--header-bg)}.search-bar{background-color:var(--content-bg);border:1px solid var(--border-color);border-radius:8px;display:flex;align-items:center;padding:0 12px;transition:all .3s ease;width:320px;height:40px;position:relative;margin-right:16px}.search-bar:focus-within{border-color:var(--primary-color);box-shadow:0 0 0 3px #0882c91a}.search-bar.expanded{width:400px}.search-bar i{color:var(--text-secondary);margin-right:8px}.search-bar input{flex:1;border:none;background:transparent;outline:none;color:var(--text-color);font-size:14px}.search-bar input::placeholder{color:var(--text-secondary)}.search-results{position:absolute;top:calc(100% + 4px);left:0;right:0;background-color:var(--header-bg);border:1px solid var(--border-color);border-radius:8px;box-shadow:var(--shadow-lg);z-index:100;max-height:300px;overflow-y:auto;display:none}.search-results.show{display:block}.search-result-item{display:flex;align-items:center;padding:12px;cursor:pointer;transition:background-color .2s;border-bottom:1px solid var(--border-color)}.search-result-item:last-child{border-bottom:none}.search-result-item:hover{background-color:var(--hover-bg)}.search-result-icon{margin-right:12px;width:20px;text-align:center;color:var(--text-secondary)}.search-result-content{flex:1;min-width:0}.search-result-name{font-weight:500;margin-bottom:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.search-result-name mark{background-color:var(--primary-color);color:#fff;padding:1px 3px;border-radius:3px}.search-result-meta{font-size:12px;color:var(--text-secondary)}.search-no-results{padding:20px;text-align:center;color:var(--text-secondary)}.content-container{flex:1;display:flex;overflow:hidden}.main-sidebar{width:3rem;background-color:var(--sidebar-bg);border-right:1px solid var(--border-color);display:flex;flex-direction:column;align-items:center;padding:20px 0;transition:all .3s ease;position:fixed;left:0;top:0;height:100vh;z-index:15}.nav-menu{display:flex;flex-direction:column;gap:8px;flex:1}.nav-item{width:36px;height:36px;align-items:center;justify-content:center;border-radius:8px;cursor:pointer;transition:all .2s ease;background:none;border:none;color:var(--text-secondary);position:relative}.nav-item:hover{background-color:var(--hover-bg);color:var(--text-color)}.nav-item.active{background-color:var(--primary-color);color:#fff}.nav-item i{font-size:16px}.sidebar-footer{margin-top:auto;display:flex;flex-direction:column;gap:8px;align-items:center}.user-avatar-container{margin-bottom:8px}.user-avatar{width:32px;height:32px;border-radius:50%;object-fit:cover;border:2px solid var(--border-color)}.logout-btn{color:var(--secondary-color)}.logout-btn:hover{background-color:#f973161a;color:var(--secondary-color)}.file-sidebar{width:240px;background-color:var(--sidebar-bg);border-right:1px solid var(--border-color);display:flex;flex-direction:column;overflow-y:auto;height:100vh;position:fixed;left:3rem;top:3.8rem;z-index:10}.file-sidebar .user-profile{padding:20px;display:flex;align-items:center;gap:12px;border-bottom:1px solid var(--border-color)}.file-sidebar .user-avatar{width:40px;height:40px;border-radius:50%;object-fit:cover}.user-info{flex:1;min-width:0}.user-name{font-size:16px;font-weight:600;margin-bottom:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.user-email{font-size:12px;color:var(--text-secondary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.file-sidebar .nav-menu{flex:1;padding:10px 0}.file-sidebar .nav-item{cursor:pointer;transition:background-color .2s;position:relative;width:100%;height:auto;border-radius:0}.file-sidebar .nav-item:hover{background-color:var(--hover-bg)}.file-sidebar .nav-item.active{background-color:var(--active-bg);border-right:3px solid var(--primary-color)}.nav-item-header{display:flex;align-items:center;gap:12px;padding:12px 20px;width:100%}.nav-item-header i{width:20px;text-align:center;color:var(--text-secondary);font-size:14px}.file-sidebar .nav-item.active .nav-item-header i{color:var(--primary-color)}.nav-item-header span{flex:1;font-size:14px;font-weight:500}.dropdown-icon{font-size:10px;transition:transform .2s;color:var(--text-secondary)}.nav-item.dropdown.open .dropdown-icon{transform:rotate(180deg)}.submenu{background-color:var(--content-bg);border-top:1px solid var(--border-color);border-bottom:1px solid var(--border-color)}.submenu-item{padding:10px 20px 10px 52px;font-size:13px}.submenu-item i{width:16px;font-size:12px}.storage-info{margin-top:auto;padding:20px;border-top:1px solid var(--border-color);cursor:pointer}.storage-text{font-size:12px;color:var(--text-secondary);margin-bottom:8px}.storage-bar{height:6px;background-color:var(--border-color);border-radius:3px;overflow:hidden}.storage-used{height:100%;background-color:var(--primary-color);border-radius:3px;transition:width .3s ease}.main-content{flex:1;display:flex;flex-direction:column;overflow:hidden;margin-left:3rem;margin-top:60px}.main-content.with-file-sidebar{margin-left:calc(3rem + 240px);margin-top:60px}.action-toolbar{height:56px;background-color:var(--header-bg);border-bottom:1px solid var(--border-color);display:flex;align-items:center;padding:0 20px;gap:12px}.action-button{background:none;border:1px solid var(--border-color);cursor:pointer;padding:8px 16px;display:flex;align-items:center;gap:8px;border-radius:8px;white-space:nowrap;transition:all .2s ease;color:var(--text-color);font-size:14px;font-weight:500}.action-button:hover{background-color:var(--hover-bg);border-color:var(--primary-color)}.action-button i{font-size:14px}.dropdown,.dropdown-toggle{position:relative}.dropdown-toggle .fa-chevron-down{margin-left:4px;font-size:12px}.dropdown-menu{position:absolute;top:calc(100% + 4px);left:0;background-color:var(--header-bg);border:1px solid var(--border-color);border-radius:8px;box-shadow:var(--shadow-lg);min-width:200px;z-index:10;display:none;max-height:300px;overflow-y:auto}.dropdown-menu.show{display:block}.dropdown-section{padding:8px 0;border-bottom:1px solid var(--border-color)}.dropdown-section:last-child{border-bottom:none}.dropdown-section-title{padding:8px 16px;font-size:12px;color:var(--text-secondary);font-weight:600;text-transform:uppercase;letter-spacing:.05em}.dropdown-item{display:flex;align-items:center;gap:12px;padding:10px 16px;text-decoration:none;color:var(--text-color);transition:background-color .2s;cursor:pointer;font-size:14px}.dropdown-item:hover{background-color:var(--hover-bg)}.dropdown-item i{width:16px;text-align:center;color:var(--text-secondary)}.files-container{flex:1;display:flex;flex-direction:column;overflow-y:auto;padding:20px}.view-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px}.view-title{display:flex;align-items:center;gap:12px}.back-button{width:36px;height:36px;display:flex;align-items:center;justify-content:center;border-radius:8px;background:none;border:1px solid var(--border-color);color:var(--text-secondary);cursor:pointer;transition:all .2s ease}.back-button:hover{background-color:var(--hover-bg);color:var(--text-color)}.breadcrumbs{display:flex;align-items:center;gap:4px}.breadcrumb-item{display:flex;align-items:center;gap:8px;padding:6px 12px;border-radius:6px;background:none;border:none;color:var(--text-secondary);cursor:pointer;transition:all .2s ease;font-size:14px;font-weight:500}.breadcrumb-item:hover{background-color:var(--hover-bg);color:var(--text-color)}.breadcrumb-item.active{color:var(--text-color);font-weight:600}.breadcrumb-item i{font-size:12px}.view-actions{display:flex;gap:4px;border:1px solid var(--border-color);border-radius:8px;padding:2px}.view-button{background:none;border:none;cursor:pointer;width:36px;height:36px;display:flex;align-items:center;justify-content:center;border-radius:6px;transition:all .2s ease;color:var(--text-secondary)}.view-button:hover{background-color:var(--hover-bg);color:var(--text-color)}.view-button.active{background-color:var(--primary-color);color:#fff}.view-button i{font-size:16px}.content-section{margin-bottom:32px}.section-title{font-size:18px;font-weight:600;margin-bottom:16px;color:var(--text-color)}.section-placeholder{flex:1;display:flex;align-items:center;justify-content:center;padding:40px}.placeholder-content{text-align:center;max-width:400px}.placeholder-icon{font-size:4rem;color:var(--text-secondary);margin-bottom:1rem}.placeholder-content h2{font-size:1.5rem;font-weight:600;margin-bottom:.5rem;color:var(--text-color)}.placeholder-content p{color:var(--text-secondary)}.folders-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:16px}.folder-item{background-color:var(--header-bg);border:1px solid var(--border-color);border-radius:12px;padding:20px;display:flex;flex-direction:column;align-items:center;gap:12px;cursor:pointer;transition:all .2s ease;position:relative}.folder-item:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);border-color:var(--primary-color)}.folder-icon{font-size:36px;color:var(--folder-color)}.folder-name{text-align:center;font-weight:500;font-size:14px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;width:100%}.folder-meta{font-size:12px;color:var(--text-secondary)}.folder-shared{position:absolute;top:12px;right:12px;color:var(--primary-color);font-size:14px}.files-header{display:flex;justify-content:space-between;align-items:center;padding:0 4px;margin-bottom:12px}.files-header-title{display:flex;align-items:center;gap:12px}.select-all-checkbox{width:16px;height:16px;accent-color:var(--primary-color)}.files-header-columns{display:flex;gap:24px;font-size:12px;color:var(--text-secondary);font-weight:500}.column-size{width:80px;text-align:right}.column-modified{width:120px;text-align:right}.files-list{display:flex;flex-direction:column;gap:4px}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:60px 20px;color:var(--text-secondary);text-align:center}.empty-state h3{font-size:18px;font-weight:600;margin-bottom:8px;color:var(--text-color)}.file-item{display:flex;align-items:center;padding:12px;background-color:var(--header-bg);border:1px solid transparent;border-radius:8px;cursor:pointer;transition:all .2s ease;width:100%}.file-item:hover{background-color:var(--hover-bg);border-color:var(--border-color)}.file-item.selected{background-color:#0882c91a;border-color:var(--primary-color)}.file-checkbox-container{margin-right:12px}.file-checkbox{width:16px;height:16px;accent-color:var(--primary-color)}.file-icon{width:24px;height:24px;display:flex;align-items:center;justify-content:center;margin-right:12px;border-radius:4px;flex-shrink:0}.file-icon i{font-size:16px}.file-icon.image i{color:var(--image-color)}.file-icon.document i{color:var(--document-color)}.file-icon.spreadsheet i{color:var(--spreadsheet-color)}.file-icon.presentation i{color:var(--presentation-color)}.file-icon.video i{color:var(--video-color)}.file-icon.audio i{color:var(--audio-color)}.file-icon.archive i{color:var(--archive-color)}.file-info{flex:1;min-width:0;display:flex;align-items:center}.file-name{flex:1;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.file-badges{display:flex;align-items:center;gap:12px;margin-left:12px}.file-shared{color:var(--primary-color)}.file-favorite{background:none;border:none;cursor:pointer;padding:4px;border-radius:4px;transition:all .2s ease;display:flex;align-items:center;justify-content:center}.file-favorite:hover{background-color:var(--hover-bg)}.file-actions{margin-left:12px}.file-menu-button{background:none;border:none;cursor:pointer;width:32px;height:32px;display:flex;align-items:center;justify-content:center;border-radius:6px;transition:all .2s ease;color:var(--text-secondary)}.file-menu-button:hover{background-color:var(--hover-bg);color:var(--text-color)}.file-size{width:80px;text-align:right;color:var(--text-secondary);font-size:12px}.file-modified{width:120px;text-align:right;color:var(--text-secondary);font-size:12px}.files-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:16px}.file-card{background-color:var(--header-bg);border:1px solid var(--border-color);border-radius:12px;overflow:hidden;cursor:pointer;transition:all .2s ease;position:relative;height:280px}.file-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);border-color:var(--primary-color)}.file-card.selected{border-color:var(--primary-color);box-shadow:0 0 0 3px #0882c91a}.file-thumbnail{height:180px;background-color:var(--content-bg);display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden}.file-thumbnail img{width:100%;height:100%;object-fit:cover}.file-thumbnail i{font-size:48px}.file-thumbnail.image i{color:var(--image-color)}.file-thumbnail.document i{color:var(--document-color)}.file-thumbnail.spreadsheet i{color:var(--spreadsheet-color)}.file-thumbnail.presentation i{color:var(--presentation-color)}.file-thumbnail.video i{color:var(--video-color)}.file-thumbnail.audio i{color:var(--audio-color)}.file-thumbnail.archive i{color:var(--archive-color)}.file-card-info{padding:16px}.file-card-name{font-weight:500;font-size:14px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin-bottom:8px}.file-card-meta{display:flex;justify-content:space-between;font-size:12px;color:var(--text-secondary);margin-bottom:8px}.file-card-actions{position:absolute;top:12px;right:12px;display:flex;gap:8px;opacity:0;transition:opacity .2s ease}.file-card:hover .file-card-actions{opacity:1}.file-card-actions button{width:32px;height:32px;display:flex;align-items:center;justify-content:center;border-radius:6px;border:none;background-color:#ffffffe6;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);cursor:pointer;transition:all .2s ease;box-shadow:var(--shadow)}.file-card-actions button:hover{background-color:#fff;transform:scale(1.05)}.favorite-button i{color:#f59e0b;font-size:14px}.file-card-actions .file-menu-button i{color:var(--text-secondary);font-size:14px}.file-shared-users{display:flex;gap:-8px}.shared-user-avatar{width:24px;height:24px;border-radius:50%;background-color:var(--primary-color);color:#fff;display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:600;margin-right:-8px;border:2px solid var(--header-bg)}.shared-user-more{width:24px;height:24px;border-radius:50%;background-color:var(--text-secondary);color:#fff;display:flex;align-items:center;justify-content:center;font-size:10px;font-weight:600;margin-right:-8px;border:2px solid var(--header-bg)}.file-card .file-checkbox{position:absolute;top:12px;left:12px;width:18px;height:18px;opacity:0;transition:opacity .2s ease;z-index:5;accent-color:var(--primary-color)}.file-card:hover .file-checkbox,.file-card .file-checkbox:checked{opacity:1}.files-section.grid-view .files-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:16px}.files-section.grid-view .file-item{display:none}.files-section.list-view .files-list{display:flex;flex-direction:column;gap:4px}.files-section.list-view .file-card{display:none}.list-view-only{display:flex}.files-section.grid-view .list-view-only{display:none}.context-menu{position:fixed;background-color:var(--header-bg);border:1px solid var(--border-color);border-radius:8px;box-shadow:var(--shadow-lg);z-index:1000;min-width:180px;padding:4px 0}.context-menu-item{display:flex;align-items:center;gap:12px;padding:10px 16px;cursor:pointer;transition:background-color .2s;font-size:14px}.context-menu-item:hover{background-color:var(--hover-bg)}.context-menu-item.danger{color:var(--error-color)}.context-menu-item.danger:hover{background-color:#ef44441a}.context-menu-item i{width:16px;text-align:center;font-size:14px}.context-menu-separator{height:1px;background-color:var(--border-color);margin:4px 0}.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background-color:#00000080;display:flex;align-items:center;justify-content:center;z-index:1000}.modal-content{background-color:var(--header-bg);border-radius:12px;box-shadow:var(--shadow-lg);width:90%;max-width:400px;max-height:90vh;overflow:hidden}.modal-header{display:flex;justify-content:space-between;align-items:center;padding:20px;border-bottom:1px solid var(--border-color)}.modal-header h3{font-size:18px;font-weight:600;margin:0}.close-button{background:none;border:none;cursor:pointer;width:32px;height:32px;display:flex;align-items:center;justify-content:center;border-radius:6px;transition:all .2s ease;color:var(--text-secondary)}.close-button:hover{background-color:var(--hover-bg);color:var(--text-color)}.modal-body{padding:20px}.modal-body label{display:block;margin-bottom:8px;font-weight:500;font-size:14px}.file-name-input{width:100%;padding:10px 12px;border:1px solid var(--border-color);border-radius:8px;outline:none;font-size:14px;background-color:var(--content-bg);color:var(--text-color);transition:border-color .2s ease}.file-name-input:focus{border-color:var(--primary-color);box-shadow:0 0 0 3px #0882c91a}.modal-footer{display:flex;justify-content:flex-end;gap:12px;padding:20px;border-top:1px solid var(--border-color)}.btn{padding:10px 16px;border:none;border-radius:8px;cursor:pointer;font-weight:500;transition:all .2s ease;font-size:14px;display:inline-flex;align-items:center;justify-content:center;gap:8px}.btn-primary{background-color:var(--btn-primary-bg);color:var(--btn-primary-text)}.btn-primary:hover{background-color:var(--primary-light)}.btn-secondary{background-color:var(--btn-secondary-bg);color:var(--btn-secondary-text);border:1px solid var(--border-color)}.btn-secondary:hover{background-color:var(--hover-bg)}@media (max-width: 1024px){.main-content.with-file-sidebar{margin-left:calc(3rem + 200px)}.file-sidebar{width:200px}}@media (max-width: 768px){.main-sidebar{transform:translate(-100%);transition:transform .3s ease}.main-sidebar.show{transform:translate(0)}.file-sidebar{transform:translate(-100%);transition:transform .3s ease;left:0;width:240px}.file-sidebar.show{transform:translate(0)}.main-content,.main-content.with-file-sidebar{margin-left:0}.header{padding:0 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576px){.brand{display:none}.search-bar{width:180px}.search-bar.expanded{width:220px}.files-grid{grid-template-columns:repeat(auto-fill,minmax(140px,1fr))}.folders-grid{grid-template-columns:repeat(auto-fill,minmax(120px,1fr))}.file-card{height:240px}.file-thumbnail{height:140px}.header-right{gap:4px}.icon-btn{width:36px;height:36px}.view-header{flex-direction:column;align-items:flex-start;gap:12px}.breadcrumb-item span{display:none}.breadcrumb-item:first-child span{display:inline}}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:var(--content-bg)}::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--text-secondary)}*:focus-visible{outline:2px solid var(--primary-color);outline-offset:2px}::selection{background-color:#0882c933}.loading{opacity:.6;pointer-events:none}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.fade-in{animation:fadeIn .3s 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