@import"https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=Spectral:wght@400;600&display=swap";@import"https://fonts.googleapis.com/css2?family=VT323&display=swap";.create-modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background-color:var(--overlay-bg);display:flex;justify-content:center;align-items:center;z-index:1000;animation:fadeIn .2s ease-out}.create-modal-card{background-color:var(--surface);border-radius:var(--radius-md);box-shadow:var(--shadow-3);width:100%;max-width:420px;animation:slideUp .3s ease-out}.create-modal-header{padding:var(--space-lg);border-bottom:1px solid var(--border);display:flex;align-items:center;gap:var(--space-sm)}.create-modal-icon{font-size:28px;line-height:1}.create-modal-title{flex:1;margin:0;font-size:var(--font-lg);font-weight:600;color:var(--text-main)}.create-modal-close{background:none;border:none;font-size:28px;line-height:1;cursor:pointer;color:var(--text-secondary);transition:color .2s ease;padding:0;width:28px;height:28px;display:flex;align-items:center;justify-content:center}.create-modal-close:hover{color:var(--text-main)}.create-modal-body{padding:var(--space-lg)}.create-modal-form-group{margin-bottom:var(--space-lg)}.create-modal-label{display:block;font-size:var(--font-sm);font-weight:500;color:var(--text-main);margin-bottom:var(--space-xs)}.create-modal-input{width:100%;padding:var(--space-sm) var(--space-md);font-size:var(--font-md);font-family:var(--font-family);border:2px solid var(--border);border-radius:var(--radius-sm);transition:border-color .2s ease;box-sizing:border-box}.create-modal-input:focus{outline:none;border-color:var(--primary)}.create-modal-input:disabled{background-color:var(--bg-secondary);cursor:not-allowed}.create-modal-error{margin-top:var(--space-xs);font-size:var(--font-xs);color:var(--error);min-height:16px}.create-modal-footer{display:flex;gap:var(--space-sm);justify-content:flex-end}.create-modal-btn{padding:var(--space-xs) var(--space-lg);font-size:var(--font-md);font-weight:500;font-family:var(--font-family);border-radius:var(--radius-sm);cursor:pointer;transition:all .2s ease;border:2px solid transparent}.create-modal-btn:disabled{opacity:.5;cursor:not-allowed}.create-modal-btn-cancel{background:transparent;border-color:var(--border);color:var(--text-secondary)}.create-modal-btn-cancel:hover:not(:disabled){border-color:var(--text-secondary);color:var(--text-main)}.create-modal-btn-create{background-color:var(--primary);border-color:var(--primary);color:#fff;box-shadow:0 2px 4px #1a73e833}.create-modal-btn-create:hover:not(:disabled){background-color:var(--primary-hover);border-color:var(--primary-hover);box-shadow:0 4px 8px #1a73e84d;transform:translateY(-1px)}.create-modal-btn-create:active:not(:disabled){transform:scale(.98)}.node-actions-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background-color:var(--overlay-bg);display:flex;justify-content:center;align-items:center;z-index:1000;animation:fadeIn .2s ease-out}.node-actions-card{background-color:var(--surface);border-radius:var(--radius-md);box-shadow:var(--shadow-3);width:100%;max-width:320px;animation:slideUp .3s ease-out}.node-actions-header{position:relative;padding:50px var(--space-lg) 15px;display:flex;align-items:center;justify-content:center}.node-actions-title{position:relative;margin:0;font-size:25px;font-weight:500;font-family:var(--font-family);color:var(--text-main);line-height:1.4;word-break:break-word;text-align:center;cursor:default;transition:color .2s ease}.node-actions-title:hover{color:var(--primary)}.info-tooltip{display:none;position:absolute;top:calc(100% + 8px);left:50%;transform:translate(-50%);background-color:#1a1a1a;color:#fff;padding:var(--space-sm) var(--space-md);border-radius:var(--radius-sm);white-space:nowrap;font-size:var(--font-xs);font-weight:400;z-index:1001;box-shadow:0 4px 12px #0006}.node-actions-title:hover .info-tooltip{display:block}.tooltip-row{display:flex;align-items:center;gap:var(--space-xs);margin-bottom:var(--space-sm);padding-bottom:var(--space-sm);border-bottom:1px solid rgba(255,255,255,.15)}.tooltip-icon{font-size:18px;line-height:1}.tooltip-type{font-size:var(--font-sm);font-weight:600}.tooltip-item{font-size:var(--font-xs);line-height:1.6;color:#ffffffe6}.node-actions-close{position:absolute;top:var(--space-lg);right:var(--space-lg);background:none;border:none;font-size:28px;line-height:1;cursor:pointer;color:var(--text-secondary);transition:color .2s ease;padding:0;width:28px;height:28px;display:flex;align-items:center;justify-content:center}.node-actions-close:hover{color:var(--text-main)}.node-actions-body{padding:15px var(--space-lg) var(--space-lg);display:flex;flex-direction:column;gap:var(--space-sm)}.node-action-btn{display:flex;align-items:center;gap:var(--space-md);padding:var(--space-md);font-size:var(--font-md);font-weight:500;font-family:var(--font-family);border:2px solid var(--border);border-radius:var(--radius-sm);background:var(--surface);color:var(--text-main);cursor:pointer;transition:all .2s ease;text-align:left}.node-action-btn:hover{border-color:var(--primary);transform:translateY(-1px);box-shadow:var(--shadow-1)}.node-action-btn:active{transform:translateY(0)}.action-icon{font-size:20px;line-height:1;flex-shrink:0}.action-label{flex:1}.node-action-btn-danger{border-color:var(--error);color:var(--error)}.node-action-btn-danger:hover{border-color:var(--error);background:#d930250d;box-shadow:0 2px 4px #d9302533}.move-modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background-color:var(--overlay-bg);display:flex;justify-content:center;align-items:center;z-index:1000;animation:fadeIn .2s ease-out}.move-modal-card{background-color:var(--surface);border-radius:var(--radius-md);box-shadow:var(--shadow-3);width:100%;max-width:420px;animation:slideUp .3s ease-out}.move-modal-header{position:relative;padding:50px var(--space-lg) 15px;display:flex;align-items:center;justify-content:center}.move-modal-title{position:relative;margin:0;font-size:25px;font-weight:500;font-family:var(--font-family);color:var(--text-main);line-height:1.4;text-align:center}.move-modal-close{position:absolute;top:var(--space-lg);right:var(--space-lg);background:none;border:none;font-size:28px;line-height:1;cursor:pointer;color:var(--text-secondary);transition:color .2s ease;padding:0;width:28px;height:28px;display:flex;align-items:center;justify-content:center}.move-modal-close:hover{color:var(--text-main)}.move-modal-body{padding:15px var(--space-lg) var(--space-lg);position:relative}.move-modal-label{display:block;font-size:16px;font-weight:500;font-family:var(--font-family);color:var(--text-main);margin-bottom:var(--space-xs)}.move-modal-input{width:100%;height:36px;padding:var(--space-sm) var(--space-md);font-size:var(--font-md);font-family:var(--font-family);border:2px solid var(--border);border-radius:var(--radius-sm);transition:border-color .2s ease;box-sizing:border-box}.move-modal-input:focus{outline:none;border-color:var(--primary)}.move-modal-input.shake{animation:shake .3s ease-in-out;border-color:var(--error)}.folder-dropdown{position:absolute;top:calc(100% - 8px);left:var(--space-lg);right:var(--space-lg);max-height:300px;overflow-y:auto;background:var(--surface);border:2px solid var(--border);border-radius:var(--radius-sm);box-shadow:var(--shadow-2);z-index:10}.folder-tree-list{padding:var(--space-xs) 0}.folder-tree-item{-webkit-user-select:none;user-select:none}.folder-tree-row{display:flex;align-items:center;justify-content:flex-start;gap:var(--space-xs);padding:var(--space-sm) var(--space-md);cursor:pointer;transition:background-color .15s ease}.folder-tree-row:hover{background-color:var(--bg-hover)}.expand-icon{width:16px;font-size:10px;color:var(--text-secondary);cursor:pointer;display:flex;align-items:center;justify-content:center;flex-shrink:0}.expand-icon-placeholder{width:16px;flex-shrink:0}.folder-name{font-size:18px;font-weight:500;font-family:var(--font-family);color:var(--text-main);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.folder-loading{padding:var(--space-sm) var(--space-md);font-size:var(--font-sm);color:var(--text-secondary)}.folder-tree-empty{padding:var(--space-md);text-align:center;font-size:var(--font-sm);color:var(--text-secondary)}.move-modal-footer{padding:var(--space-md) var(--space-lg) var(--space-lg);display:flex;gap:var(--space-sm);justify-content:flex-end}.move-modal-btn{padding:var(--space-xs) var(--space-lg);font-size:var(--font-md);font-weight:500;font-family:var(--font-family);border-radius:var(--radius-sm);cursor:pointer;transition:all .2s ease;border:2px solid transparent}.move-modal-btn:disabled{opacity:.5;cursor:not-allowed}.move-modal-btn-cancel{background:transparent;border-color:var(--border);color:var(--text-secondary)}.move-modal-btn-cancel:hover:not(:disabled){border-color:var(--text-secondary);color:var(--text-main)}.move-modal-btn-move{background-color:var(--primary);border-color:var(--primary);color:#fff;box-shadow:0 2px 4px #1a73e833}.move-modal-btn-move:hover:not(:disabled){background-color:var(--primary-hover);border-color:var(--primary-hover);box-shadow:0 4px 8px #1a73e84d;transform:translateY(-1px)}.move-modal-btn-move:active:not(:disabled){transform:scale(.98)}.rename-modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background-color:var(--overlay-bg);display:flex;justify-content:center;align-items:center;z-index:1000;animation:fadeIn .2s ease-out}.rename-modal-card{background-color:var(--surface);border-radius:var(--radius-md);box-shadow:var(--shadow-3);width:100%;max-width:420px;animation:slideUp .3s ease-out}.rename-modal-header{position:relative;padding:50px var(--space-lg) 15px;display:flex;align-items:center;justify-content:center}.rename-modal-title{position:relative;margin:0;font-size:25px;font-weight:500;font-family:var(--font-family);color:var(--text-main);line-height:1.4;text-align:center}.rename-modal-close{position:absolute;top:var(--space-lg);right:var(--space-lg);background:none;border:none;font-size:28px;line-height:1;cursor:pointer;color:var(--text-secondary);transition:color .2s ease;padding:0;width:28px;height:28px;display:flex;align-items:center;justify-content:center}.rename-modal-close:hover{color:var(--text-main)}.rename-modal-body{padding:15px var(--space-lg) var(--space-lg)}.rename-modal-label{display:block;font-size:16px;font-weight:500;font-family:var(--font-family);color:var(--text-main);margin-bottom:var(--space-xs)}.rename-modal-input{width:100%;height:36px;padding:var(--space-sm) var(--space-md);font-size:var(--font-md);font-family:var(--font-family);border:2px solid var(--border);border-radius:var(--radius-sm);transition:border-color .2s ease;box-sizing:border-box}.rename-modal-input:focus{outline:none;border-color:var(--primary)}.rename-modal-input:disabled{opacity:.5;cursor:not-allowed}.rename-modal-error{margin-top:var(--space-xs);font-size:var(--font-sm);color:var(--error);animation:shake .3s ease-in-out}.rename-modal-footer{padding:var(--space-md) var(--space-lg) var(--space-lg);display:flex;gap:var(--space-sm);justify-content:flex-end}.rename-modal-btn{padding:var(--space-xs) var(--space-lg);font-size:var(--font-md);font-weight:500;font-family:var(--font-family);border-radius:var(--radius-sm);cursor:pointer;transition:all .2s ease;border:2px solid transparent}.rename-modal-btn:disabled{opacity:.5;cursor:not-allowed}.rename-modal-btn-cancel{background:transparent;border-color:var(--border);color:var(--text-secondary)}.rename-modal-btn-cancel:hover:not(:disabled){border-color:var(--text-secondary);color:var(--text-main)}.rename-modal-btn-rename{background-color:var(--primary);border-color:var(--primary);color:#fff;box-shadow:0 2px 4px #1a73e833}.rename-modal-btn-rename:hover:not(:disabled){background-color:var(--primary-hover);border-color:var(--primary-hover);box-shadow:0 4px 8px #1a73e84d;transform:translateY(-1px)}.rename-modal-btn-rename:active:not(:disabled){transform:scale(.98)}.delete-modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background-color:var(--overlay-bg);display:flex;justify-content:center;align-items:center;z-index:1000;animation:fadeIn .2s ease-out}.delete-modal-card{background-color:var(--surface);border-radius:var(--radius-md);box-shadow:var(--shadow-3);width:100%;max-width:420px;animation:slideUp .3s ease-out}.delete-modal-header{position:relative;padding:50px var(--space-lg) 15px;display:flex;align-items:center;justify-content:center}.delete-modal-title{position:relative;margin:0;font-size:25px;font-weight:500;font-family:var(--font-family);color:var(--text-main);line-height:1.4;text-align:center}.delete-modal-close{position:absolute;top:var(--space-lg);right:var(--space-lg);background:none;border:none;font-size:28px;line-height:1;cursor:pointer;color:var(--text-secondary);transition:color .2s ease;padding:0;width:28px;height:28px;display:flex;align-items:center;justify-content:center}.delete-modal-close:hover{color:var(--text-main)}.delete-modal-body{padding:15px var(--space-lg) var(--space-lg)}.delete-modal-warning{text-align:center}.delete-modal-message{font-size:16px;font-family:var(--font-family);color:var(--text-main);margin:0 0 var(--space-md) 0;line-height:1.5}.delete-modal-node-info{font-size:18px;font-family:var(--font-family);color:var(--text-main);margin:var(--space-md) 0;padding:var(--space-md);background-color:var(--bg-hover);border-radius:var(--radius-sm)}.delete-modal-hint{font-size:14px;font-family:var(--font-family);color:var(--text-secondary);margin:var(--space-md) 0 0 0;font-style:italic}.delete-modal-error{margin-top:var(--space-md);font-size:var(--font-sm);color:var(--error);text-align:center;animation:shake .3s ease-in-out}.delete-modal-footer{padding:var(--space-md) var(--space-lg) var(--space-lg);display:flex;gap:var(--space-sm);justify-content:flex-end}.delete-modal-btn{padding:var(--space-xs) var(--space-lg);font-size:var(--font-md);font-weight:500;font-family:var(--font-family);border-radius:var(--radius-sm);cursor:pointer;transition:all .2s ease;border:2px solid transparent}.delete-modal-btn:disabled{opacity:.5;cursor:not-allowed}.delete-modal-btn-cancel{background:transparent;border-color:var(--primary);color:var(--primary)}.delete-modal-btn-cancel:hover:not(:disabled){background-color:var(--primary);color:#fff;box-shadow:0 2px 4px #1a73e833}.delete-modal-btn-delete{background:transparent;border-color:var(--error);color:var(--error)}.delete-modal-btn-delete:hover:not(:disabled){background-color:var(--error);color:#fff;box-shadow:0 2px 4px #dc26264d;transform:translateY(-1px)}.delete-modal-btn-delete:active:not(:disabled){transform:scale(.98)}.drag-move-modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background-color:var(--overlay-bg);display:flex;justify-content:center;align-items:center;z-index:1000;animation:fadeIn .2s ease-out}.drag-move-modal-card{background-color:var(--surface);border-radius:var(--radius-md);box-shadow:var(--shadow-3);width:100%;max-width:420px;animation:slideUp .3s ease-out}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.drag-move-modal-header{position:relative;padding:50px var(--space-lg) 15px;display:flex;align-items:center;justify-content:center}.drag-move-modal-title{position:relative;margin:0;font-size:25px;font-weight:500;font-family:var(--font-family);color:var(--text-main);line-height:1.4;text-align:center}.drag-move-modal-close{position:absolute;top:var(--space-lg);right:var(--space-lg);background:none;border:none;font-size:28px;line-height:1;cursor:pointer;color:var(--text-secondary);transition:color .2s ease;padding:0;width:28px;height:28px;display:flex;align-items:center;justify-content:center}.drag-move-modal-close:hover{color:var(--text-main)}.drag-move-modal-body{padding:15px var(--space-lg) var(--space-lg)}.drag-move-modal-confirmation{text-align:center}.drag-move-modal-message{font-size:16px;font-family:var(--font-family);color:var(--text-main);margin:0 0 var(--space-sm) 0;line-height:1.5}.drag-move-modal-node-info{font-size:18px;font-family:var(--font-family);color:var(--text-main);margin:var(--space-sm) 0;padding:var(--space-md);background-color:var(--bg-hover);border-radius:var(--radius-sm)}.drag-move-modal-error{margin-top:var(--space-md);font-size:var(--font-sm);color:var(--error);text-align:center;animation:shake .3s ease-in-out}@keyframes shake{0%,to{transform:translate(0)}25%{transform:translate(-8px)}75%{transform:translate(8px)}}.drag-move-modal-footer{padding:var(--space-md) var(--space-lg) var(--space-lg);display:flex;gap:var(--space-sm);justify-content:flex-end}.drag-move-modal-btn{padding:var(--space-xs) var(--space-lg);font-size:var(--font-md);font-weight:500;font-family:var(--font-family);border-radius:var(--radius-sm);cursor:pointer;transition:all .2s ease;border:2px solid transparent}.drag-move-modal-btn:disabled{opacity:.5;cursor:not-allowed}.drag-move-modal-btn-cancel{background:transparent;border-color:var(--primary);color:var(--primary)}.drag-move-modal-btn-cancel:hover:not(:disabled){background-color:var(--primary);color:#fff;box-shadow:0 2px 4px #1a73e833}.drag-move-modal-btn-confirm{background-color:var(--primary);border-color:var(--primary);color:#fff}.drag-move-modal-btn-confirm:hover:not(:disabled){background-color:var(--primary-hover);border-color:var(--primary-hover);box-shadow:0 2px 4px #1a73e84d;transform:translateY(-1px)}.drag-move-modal-btn-confirm:active:not(:disabled){transform:scale(.98)}.logout-button-wrapper{position:relative;width:200px;margin:0 auto;padding:var(--space-md)}.logout-button{width:200px;padding:var(--space-xs) var(--space-sm);font-size:var(--font-md);border:2px solid var(--primary);background:transparent;color:var(--primary);border-radius:var(--radius-sm);cursor:pointer;font-family:var(--font-family);font-weight:500;transition:all .2s ease;text-align:center}.logout-button:hover{border-color:var(--error);color:var(--error)}.logout-button:active{transform:scale(.98)}.logout-dialog{position:absolute;bottom:calc(100% + 8px);left:50%;transform:translate(-50%);width:200px;background-color:var(--surface);border-radius:var(--radius-sm);box-shadow:var(--shadow-3);padding:var(--space-md);z-index:1001;animation:dialogSlideUp .2s ease-out}@keyframes dialogSlideUp{0%{opacity:0;transform:translate(-50%) translateY(8px)}to{opacity:1;transform:translate(-50%) translateY(0)}}.logout-dialog-text{margin:0 0 var(--space-md) 0;font-size:var(--font-sm);color:var(--text-main);text-align:center;line-height:1.4}.logout-dialog-buttons{display:flex;gap:var(--space-sm);justify-content:center}.logout-dialog-btn{flex:1;padding:var(--space-xs) var(--space-sm);font-size:var(--font-sm);border-radius:var(--radius-sm);cursor:pointer;font-family:var(--font-family);font-weight:500;transition:all .2s ease;border:2px solid}.logout-btn-no{border-color:var(--primary);background:transparent;color:var(--primary)}.logout-btn-no:hover{background-color:var(--primary-bg)}.logout-btn-yes{border-color:var(--error);background:transparent;color:var(--error)}.logout-btn-yes:hover{background-color:#d9302514}.logout-dialog-btn:active{transform:scale(.97)}.test-sign-banner{position:relative;background:linear-gradient(135deg,#e3f2fd,#bbdefb);border-left:4px solid #1976d2;border-radius:8px;padding:12px 48px 12px 16px;margin:0 var(--space-lg);margin-bottom:var(--space-md);box-shadow:0 2px 8px #1976d226;animation:slideDown .4s ease-out;z-index:50}@keyframes slideDown{0%{opacity:0;transform:translateY(-20px)}to{opacity:1;transform:translateY(0)}}.test-sign-content{display:flex;align-items:center;gap:12px}.test-sign-icon{font-size:24px;flex-shrink:0;animation:pulse 2s ease-in-out infinite}@keyframes pulse{0%,to{transform:scale(1)}50%{transform:scale(1.1)}}.test-sign-text{flex:1;font-size:16px;line-height:1.6;color:#0d47a1;font-family:var(--font-family)}.test-sign-text strong{font-weight:600;color:#01579b}.test-sign-link{color:#1976d2;text-decoration:none;font-weight:500;transition:all .2s ease;border-bottom:1px solid transparent}.test-sign-link:hover{color:#0d47a1;border-bottom-color:#0d47a1}.test-sign-wechat{font-family:Courier New,monospace;background-color:#1976d21a;padding:2px 6px;border-radius:4px;font-weight:500;color:#01579b;font-size:16px;cursor:pointer;transition:all .2s ease;-webkit-user-select:none;user-select:none}.test-sign-wechat:hover{background-color:#1976d233;transform:scale(1.05)}.test-sign-wechat:active{transform:scale(.98)}.test-sign-close{position:absolute;top:8px;right:8px;background:none;border:none;font-size:24px;line-height:1;cursor:pointer;color:#1976d2;width:28px;height:28px;border-radius:50%;display:flex;align-items:center;justify-content:center;transition:all .2s ease;padding:0}.test-sign-close:hover{background-color:#1976d226;color:#0d47a1;transform:rotate(90deg)}.test-sign-close:active{transform:rotate(90deg) scale(.9)}.test-sign-toast{position:fixed;top:20px;left:50%;transform:translate(-50%);background-color:#2e2e2e;color:#fff;padding:12px 20px;border-radius:8px;box-shadow:0 4px 12px #0000004d;display:flex;align-items:center;gap:8px;font-size:15px;font-family:var(--font-family);z-index:10000;animation:toastSlideIn .3s ease-out}.test-sign-toast.fade-out{animation:toastFadeOut .3s ease-out forwards}@keyframes toastSlideIn{0%{opacity:0;transform:translate(-50%) translateY(-20px)}to{opacity:1;transform:translate(-50%) translateY(0)}}@keyframes toastFadeOut{0%{opacity:1;transform:translate(-50%) translateY(0)}to{opacity:0;transform:translate(-50%) translateY(-20px)}}.test-sign-toast-icon{color:#4caf50;font-size:18px;font-weight:700}.sort-toggles{display:flex;gap:8px;align-items:center}.sort-toggle{display:flex;align-items:center;gap:4px;padding:6px 12px;background-color:transparent;border:1px solid #d1d5db;border-radius:6px;cursor:pointer;transition:all .2s ease;color:#6b7280}.sort-toggle:hover{background-color:#f3f4f6;border-color:#9ca3af}.sort-toggle[data-state=on]{background-color:#1a73e8;border-color:#1a73e8;color:#fff}.sort-toggle[data-state=on]:hover{background-color:#1557b0;border-color:#1557b0}.sort-toggle-icon{width:16px;height:16px}.sort-direction-icon{width:14px;height:14px}.sort-tooltip-content{background-color:#000;color:#fff;padding:8px 12px;border-radius:4px;font-size:13px;line-height:1.4;box-shadow:0 2px 8px #00000026;z-index:1000;animation:fadeIn .2s ease-out}.sort-tooltip-arrow{fill:#000}@keyframes fadeIn{0%{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:translateY(0)}}:root{--primary: #1A73E8;--primary-hover: #174EA6;--primary-bg: #E8F0FE;--surface: #FFFFFF;--bg-app: #F8F9FA;--text-main: #202124;--text-secondary: #5F6368;--text-disabled: #DADCE0;--border: #DADCE0;--success: #1E8E3E;--error: #D93025;--warning: #F9AB00;--font-family: "Google Sans", "Roboto", -apple-system, sans-serif;--font-xs: 12px;--font-sm: 14px;--font-md: 16px;--font-lg: 20px;--font-xl: 24px;--radius-pill: 20px;--radius-sm: 4px;--radius-md: 8px;--radius-lg: 16px;--space-xs: 4px;--space-sm: 8px;--space-md: 16px;--space-lg: 24px;--space-xl: 32px;--shadow-1: 0 1px 2px 0 rgba(60,64,67,.3), 0 1px 3px 1px rgba(60,64,67,.15);--shadow-2: 0 4px 8px 3px rgba(60,64,67,.15);--shadow-3: 0 8px 16px 4px rgba(60,64,67,.15);--overlay-bg: rgba(0, 0, 0, .4);--bg-secondary: #EEEEEE;--bg-hover: rgba(0, 0, 0, .04)}.login-container{display:flex;justify-content:center;align-items:center;height:100vh;background-color:var(--bg-app)}.login-card{background-color:var(--surface);padding:var(--space-xl);border-radius:var(--radius-md);box-shadow:var(--shadow-1);width:100%;max-width:400px}.login-title{font-family:var(--font-family);font-size:var(--font-xl);color:var(--text-main);margin-bottom:var(--space-lg);text-align:center}.login-footer{margin-top:var(--space-lg);text-align:center;font-size:var(--font-sm);color:var(--text-secondary)}.login-footer a{color:var(--primary);text-decoration:none}.login-footer a:hover{text-decoration:underline}.signup-container{display:flex;justify-content:center;align-items:center;height:100vh;background-color:var(--bg-app)}.signup-card{background-color:var(--surface);padding:var(--space-xl);border-radius:var(--radius-md);box-shadow:var(--shadow-1);width:100%;max-width:400px}.signup-title{font-family:var(--font-family);font-size:var(--font-xl);color:var(--text-main);margin-bottom:var(--space-lg);text-align:center}.form-group{margin-bottom:var(--space-md)}.form-group label{display:block;font-family:var(--font-family);font-size:var(--font-xs);color:var(--text-secondary);margin-bottom:var(--space-xs)}.form-group input{width:100%;padding:var(--space-sm);border:1px solid var(--border);border-radius:var(--radius-sm);font-family:var(--font-family);font-size:var(--font-sm);box-sizing:border-box}.form-group input:focus{outline:none;border-color:var(--primary)}.btn-primary{width:100%;padding:var(--space-sm) var(--space-md);background-color:var(--primary);color:#fff;border:none;border-radius:var(--radius-pill);font-family:var(--font-family);font-size:var(--font-sm);cursor:pointer;transition:background-color .2s}.btn-primary:hover{background-color:var(--primary-hover)}.btn-primary:disabled{background-color:var(--text-disabled);cursor:not-allowed}.error-message{color:var(--error);font-size:var(--font-sm);margin-bottom:var(--space-md);min-height:20px;text-align:center}.signup-footer{margin-top:var(--space-lg);text-align:center;font-size:var(--font-sm);color:var(--text-secondary)}.signup-footer a{color:var(--primary);text-decoration:none}.signup-footer a:hover{text-decoration:underline}.hidden{display:none!important}.verification-text{font-family:var(--font-family);font-size:var(--font-sm);color:var(--text-secondary);text-align:center;margin-bottom:var(--space-lg)}.resend-container{margin-top:var(--space-md);text-align:center;font-size:var(--font-sm)}.btn-link{background:none;border:none;color:var(--primary);cursor:pointer;font-family:var(--font-family);font-size:var(--font-sm);padding:0}.btn-link:hover{text-decoration:underline}.btn-link:disabled{color:var(--text-disabled);cursor:default;text-decoration:none}.workspace-container{display:grid;grid-template-columns:280px 1fr;min-height:calc(100vh - 200px);background-color:var(--bg-app);font-family:var(--font-family)}.workspace-sidebar{background-color:var(--surface);border-right:1px solid var(--border);display:flex;flex-direction:column;padding:var(--space-md);position:sticky;top:0;height:calc(100vh - 120px);overflow-y:auto;align-self:flex-start}.sidebar-header{display:flex;flex-direction:column;align-items:center;margin-bottom:var(--space-lg);gap:var(--space-sm);position:relative;z-index:101}.sidebar-header .btn-primary{width:200px;align-self:center;border-radius:var(--radius-sm);padding:var(--space-xs) var(--space-sm);font-size:var(--font-md);font-weight:500;font-family:var(--font-family);background-color:var(--primary);color:#fff;border:none;cursor:pointer;transition:all .2s ease;box-shadow:0 2px 4px #1a73e833}.sidebar-header .btn-primary:hover{transform:translateY(-2px);box-shadow:0 4px 8px #1a73e84d;background-color:var(--primary-hover)}.sidebar-header .btn-primary:active{transform:scale(.98)}.sidebar-header h2{font-size:var(--font-md);color:var(--text-main)}.btn-sm{padding:var(--space-xs) var(--space-sm);font-size:var(--font-md)}.workspace-search-row{width:200px;position:relative}#workspace-search-input{width:200px;padding:6px 28px 6px 10px;border:1px solid var(--border);border-radius:var(--radius-sm);font-size:var(--font-sm);font-family:var(--font-family);box-sizing:border-box}#workspace-search-input:focus{outline:none;border-color:var(--primary)}#workspace-search-clear{position:absolute;top:50%;right:6px;transform:translateY(-50%);width:18px;height:18px;border-radius:50%;border:none;background:#e0e0e0;color:#333;font-size:12px;line-height:1;cursor:pointer}#workspace-search-clear:hover{background:#d0d0d0}.form-error{margin-top:6px;font-size:12px;color:var(--error);min-height:14px}.workspace-main{display:flex;flex-direction:column;position:relative;min-height:100vh}.workspace-main:before{content:"";position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:600px;height:600px;background:url(/assets/desktop/cat_mainpage.png?v=3) center center no-repeat;background-size:contain;z-index:1;pointer-events:none;opacity:1}.main-header{background-color:var(--surface);padding:var(--space-md) var(--space-lg);border-bottom:1px solid var(--border);display:flex;align-items:center;gap:var(--space-md);position:relative;z-index:100}.breadcrumb{display:flex;gap:var(--space-xs);font-size:var(--font-sm);color:var(--text-secondary);position:relative;z-index:101}.breadcrumb-item{cursor:pointer}.breadcrumb-item:hover{color:var(--primary);text-decoration:underline}.breadcrumb-item:after{content:"/";margin-left:var(--space-xs);color:var(--text-disabled)}.breadcrumb-item:last-child:after{content:""}.path-jump{flex:0 0 320px}.view-options{margin-left:auto;display:flex;align-items:center}#path-input{width:100%;padding:6px 10px;border:1px solid var(--border);border-radius:var(--radius-sm);font-size:var(--font-sm);font-family:var(--font-family);position:relative;z-index:101}#path-input:focus{outline:none;border-color:var(--primary)}.path-input-shake{animation:path-shake .3s ease-in-out}@keyframes path-shake{0%{transform:translate(0)}25%{transform:translate(-4px)}50%{transform:translate(4px)}75%{transform:translate(-3px)}to{transform:translate(0)}}.items-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:var(--space-lg);padding:var(--space-lg);position:relative;background-color:#ffffff0a}.grid-item{background-color:#ffffffb3;border-radius:var(--radius-md);padding:var(--space-md);display:flex;flex-direction:column;align-items:center;cursor:pointer;transition:transform .2s,box-shadow .2s;border:1px solid transparent;position:relative;z-index:10}.grid-item:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:var(--primary-bg)}.grid-item.drag-over{border-color:var(--primary);box-shadow:var(--shadow-1);transform:translateY(-2px)}.grid-item.shake{animation:item-shake .3s ease-in-out}@keyframes item-shake{0%{transform:translate(0)}25%{transform:translate(-4px)}50%{transform:translate(4px)}75%{transform:translate(-3px)}to{transform:translate(0)}}.item-icon{color:var(--primary);margin-bottom:var(--space-sm);position:relative;z-index:10}.item-info{text-align:center;width:100%}.item-title{display:block;font-size:var(--font-sm);font-weight:600;color:var(--text-main);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;position:relative;z-index:10}.item-meta{font-size:var(--font-xs);color:var(--text-secondary);position:relative;z-index:10}.item-title-input{width:100%;padding:4px 6px;border:1px solid var(--border);border-radius:var(--radius-sm);font-size:var(--font-sm);font-family:var(--font-family)}.item-error{display:block;min-height:14px;font-size:12px;color:var(--error);margin-top:4px}.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background-color:var(--overlay-bg);display:flex;justify-content:center;align-items:center;z-index:1000}.modal-card{background-color:var(--surface);border-radius:var(--radius-lg);box-shadow:var(--shadow-3);width:100%;max-width:450px;display:flex;flex-direction:column}.modal-header{padding:var(--space-md) var(--space-lg);border-bottom:1px solid var(--border);display:flex;justify-content:space-between;align-items:center;cursor:move}.modal-header h3{margin:0;font-size:var(--font-lg)}.modal-close{background:none;border:none;font-size:24px;cursor:pointer;color:var(--text-secondary)}.modal-body{padding:var(--space-lg)}.modal-footer{padding:var(--space-md) var(--space-lg);border-top:1px solid var(--border);display:flex;justify-content:flex-end;gap:var(--space-md)}.btn-text{background:none;border:none;color:var(--text-secondary);cursor:pointer;padding:var(--space-sm) var(--space-md)}.btn-text:hover{color:var(--text-main)}.action-card,.move-card,.confirm-card{max-width:420px}.modal-title-group{display:flex;flex-direction:column;gap:4px}.modal-eyebrow{font-size:var(--font-xs);color:var(--text-secondary);text-transform:uppercase;letter-spacing:.08em}.modal-title{margin:0}.action-body{display:grid;gap:var(--space-md)}.action-btn{border:1px solid var(--border);background:var(--surface);padding:var(--space-md);border-radius:var(--radius-md);font-size:var(--font-sm);cursor:pointer;transition:border-color .2s,transform .2s,box-shadow .2s}.action-btn:hover{border-color:var(--primary);transform:translateY(-1px);box-shadow:var(--shadow-1)}.action-btn.danger{border-color:var(--danger, #e05d5d);color:var(--danger, #e05d5d)}.confirm-text{margin:0;color:var(--text-main);font-size:var(--font-sm)}.btn-danger{background:var(--danger, #e05d5d);color:#fff;border:none;padding:var(--space-sm) var(--space-md);border-radius:var(--radius-md);cursor:pointer}#logout-button-container{margin-top:auto}.study-container{display:grid;--splitter-width: 8px;--study-left-width: 240px;--study-right-width: 320px;grid-template-columns:var(--study-left-width) var(--splitter-width) 1fr var(--splitter-width) var(--study-right-width);background-color:var(--bg-app);font-family:var(--font-family);margin-bottom:60px}.study-sidebar,.study-right-panel{background-color:var(--surface);display:flex;flex-direction:column;min-height:0;position:relative;z-index:3}.study-right-panel{border-left:none}.panel-splitter{width:var(--splitter-width);cursor:col-resize;background:linear-gradient(to right,transparent,rgba(0,0,0,.08),transparent);position:relative;z-index:2}.panel-splitter:hover:after{opacity:1}.panel-splitter:after{content:"";position:absolute;top:0;bottom:0;left:2px;right:2px;background:#00000014;opacity:0;transition:opacity .2s}.panel-header{padding:var(--space-sm) var(--space-md);border-bottom:1px solid var(--border);display:flex;justify-content:space-between;align-items:center;position:relative;z-index:4}.panel-header-left{display:flex;align-items:center;gap:var(--space-sm)}.btn-back{font-size:var(--font-xs);padding:var(--space-xs) var(--space-sm)}.panel-header h3{font-size:var(--font-sm);margin:0}.panel-actions{display:flex;gap:var(--space-xs);position:relative;z-index:5}.chapter-list{flex:1;min-height:0}.chapter-empty{padding:var(--space-md);color:var(--text-secondary);font-size:var(--font-sm)}.chapter-item{padding:var(--space-sm) var(--space-md);cursor:pointer;display:flex;gap:var(--space-sm);font-size:var(--font-sm);border-bottom:1px solid var(--bg-app)}.chapter-item:hover{background-color:var(--primary-bg)}.chapter-item.active{background-color:var(--primary-bg);color:var(--primary);font-weight:600}.chapter-order{color:var(--text-secondary);min-width:20px}.study-center-panel{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:var(--space-lg);background-color:var(--bg-app);min-height:0;gap:var(--space-lg)}.board-mount{width:100%;flex:1 1 auto;min-height:0;display:flex;align-items:center;justify-content:center;overflow:hidden}.board-mount>.chessboard{width:100%;height:100%;aspect-ratio:1 / 1;box-shadow:var(--shadow-2)}.board-mount>.chessboard-v2{width:66.6667%;height:auto;aspect-ratio:1 / 1;margin-left:auto;margin-right:auto;box-shadow:var(--shadow-2)}.board-mount .chessboard .square{aspect-ratio:1 / 1}.board-controls{margin-top:var(--space-lg);display:flex;gap:var(--space-md)}.panel-tabs{display:flex;border-bottom:1px solid var(--border)}.tab-btn{flex:1;padding:var(--space-sm);background:none;border:none;border-bottom:2px solid transparent;cursor:pointer;font-size:var(--font-xs);font-weight:600;color:var(--text-secondary)}.tab-btn.active{color:var(--primary);border-bottom-color:var(--primary)}.tab-content{display:none;flex:1;padding:var(--space-md);min-height:0}.tab-content.active{display:flex;flex-direction:column}.tab-content#tab-pgn{overflow:hidden}.analysis-module{margin-bottom:var(--space-md)}.move-tree{font-size:var(--font-sm);line-height:1.6;flex:1;min-height:0}.move-tree-row{display:grid;grid-template-columns:40px 1fr 1fr;align-items:center;gap:var(--space-xs);margin-bottom:var(--space-xs)}.move-tree-number{color:var(--text-secondary);font-variant-numeric:tabular-nums}.move-tree-move{border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--bg-panel);padding:var(--space-xxs) var(--space-xs);text-align:left;cursor:pointer}.move-tree-move:disabled{opacity:.4;cursor:default}.move-tree-move:not(:disabled):hover{background:var(--bg-app)}.pgn-comment{margin-top:var(--space-md);display:flex;flex-direction:column;gap:var(--space-sm);flex-shrink:0}.pgn-comment-tabs{display:flex;gap:var(--space-xs);align-items:center}.pgn-tab-btn{border:1px solid var(--border);border-radius:999px;background:var(--bg-panel);padding:4px 10px;font-size:var(--font-xs);cursor:pointer}.pgn-tab-btn.active{background:var(--text-primary);color:var(--bg-app)}.pgn-comment-panel{display:none;flex-direction:column;gap:var(--space-sm)}.pgn-comment-panel.active{display:flex}#pgn-comment-input{width:100%;min-height:70px;padding:var(--space-sm);border:1px solid var(--border);border-radius:var(--radius-sm);font-family:var(--font-family);font-size:var(--font-sm);resize:vertical}#pgn-fen-display{width:100%;min-height:70px;padding:var(--space-sm);border:1px solid var(--border);border-radius:var(--radius-sm);font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,Courier New,monospace;font-size:var(--font-sm);resize:vertical}.move-tree-empty,.board-empty,.discussion-empty{color:var(--text-secondary);font-size:var(--font-sm)}.btn-icon{background:none;border:1px solid var(--border);border-radius:var(--radius-sm);padding:var(--space-xs) var(--space-sm);cursor:pointer}.btn-icon:hover{background-color:var(--bg-app)}.discussion-container{display:flex;flex-direction:column;height:100%}.discussion-thread-list{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:var(--space-md);padding-bottom:var(--space-md)}.discussion-thread-item{border-bottom:1px solid 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24px;height:100px;background-color:#fff;border-bottom:1px solid #dbdbdb;font-family:Roboto,sans-serif;position:sticky;top:0;z-index:1000}.header-left{display:flex;align-items:center;gap:24px}.header-left .logo{display:flex;align-items:center;text-decoration:none;color:#202124;height:100%}.header-left .logo-image{height:100px;width:auto;display:block}.header-center{display:flex;align-items:center;gap:8px}.header-center .nav-link{font-size:20px;font-weight:500;color:#5f6368;text-decoration:none;padding:8px 16px;border-radius:4px;transition:background-color .3s}.header-center .nav-link:hover{background-color:#f1f3f4}.header-right .username{font-size:18px;font-weight:500;color:#202124}.header-right .nav-link{font-size:18px;font-weight:500;color:#1a73e8;text-decoration:none}.header-right{display:flex;align-items:center;gap:12px}body{background:var(--bg-app, #F8F9FA);margin:0}main{background:transparent}.app-footer{position:relative;width:100%;background:linear-gradient(135deg,#231a4a,#2d1f5c,#1a0f3a);color:#fff;padding:2rem 3rem 1.5rem;margin-top:auto;overflow:hidden}.app-footer:before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent 0%,rgba(212,175,55,.6) 20%,rgba(240,198,116,.8) 50%,rgba(212,175,55,.6) 80%,transparent 100%)}.footer-gradient-overlay{position:absolute;top:0;left:0;right:0;bottom:0;background:radial-gradient(ellipse at bottom,rgba(138,103,255,.08) 0%,transparent 60%);pointer-events:none}.footer-content{position:relative;display:grid;grid-template-columns:1.2fr 1fr 1.5fr;gap:3rem;max-width:1400px;margin:0 auto;margin-bottom:1.5rem}.footer-main{display:flex;align-items:center}.footer-brand{display:flex;align-items:center;gap:1.2rem}.brand-icon{font-size:3.5rem;color:#d4af37;text-shadow:0 0 20px rgba(212,175,55,.5);animation:gentleGlow 3s ease-in-out infinite}@keyframes 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