:root{--bg-primary: #FAFBFC;--bg-secondary: #FFFFFF;--bg-tertiary: #F1F3F5;--border-color: #E1E4E8;--border-light: #EBEDEF;--accent: #1565C0;--accent-hover: #0D47A1;--accent-light: #E3F2FD;--accent-subtle: #F0F6FF;--text-primary: #24292E;--text-secondary: #586069;--text-muted: #8B949E;--danger: #D73A49;--danger-hover: #CB2431;--danger-bg: #FFEEF0;--success: #28A745;--success-bg: #DCFFE4;--warning: #F9A825;--shadow-sm: 0 1px 3px rgba(0,0,0,.08);--shadow-md: 0 4px 12px rgba(0,0,0,.1);--shadow-lg: 0 8px 24px rgba(0,0,0,.12);--radius-sm: 4px;--radius-md: 8px;--radius-lg: 12px;--sidebar-width: 280px;--header-height: 52px;--transition: .2s ease;--font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body{height:100%;font-family:var(--font-family);font-size:14px;color:var(--text-primary);background:var(--bg-primary);-webkit-font-smoothing:antialiased}#root{height:100%}.btn{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border:1px solid var(--border-color);border-radius:var(--radius-sm);background:var(--bg-secondary);color:var(--text-primary);font-size:13px;font-family:inherit;cursor:pointer;transition:all var(--transition);white-space:nowrap}.btn:hover{background:var(--bg-tertiary);border-color:#ccd1d5}.btn:active{transform:scale(.97)}.btn-primary{background:var(--accent);color:#fff;border-color:var(--accent)}.btn-primary:hover{background:var(--accent-hover);border-color:var(--accent-hover)}.btn-primary:disabled{opacity:.5;cursor:not-allowed}.btn-secondary{background:var(--bg-tertiary);border-color:var(--border-color)}.btn-ghost{background:#ffffff1a;border-color:#ffffff40;color:#ffffffe6;border-radius:20px;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);font-weight:500;letter-spacing:.3px}.btn-ghost:hover{background:#fff3;border-color:#fff6;color:#fff;box-shadow:0 0 8px #ffffff1a}.btn-sm{padding:5px 10px;font-size:12px}.btn-outline{background:transparent}.btn-outline:hover{background:var(--accent-light);border-color:var(--accent);color:var(--accent)}.btn-icon{display:flex;align-items:center;justify-content:center;width:32px;height:32px;padding:0;border:none;border-radius:var(--radius-sm);background:transparent;cursor:pointer;color:#ffffffb3;transition:all var(--transition)}.btn-icon:hover{background:#ffffff26;color:#fff}.btn.has-changes{animation:pulse-save 1.5s infinite}@keyframes pulse-save{0%,to{box-shadow:0 0 #1565c04d}50%{box-shadow:0 0 0 4px #1565c026}}.login-screen{display:flex;align-items:center;justify-content:center;min-height:100vh;background:linear-gradient(135deg,#1565c0,#0d47a1,#1a237e)}.login-card{background:var(--bg-secondary);padding:48px 40px;border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);text-align:center;max-width:400px;width:90%}.login-logo{width:120px;height:auto;margin-bottom:16px}.login-title{font-size:28px;font-weight:700;color:var(--text-primary);margin-bottom:8px}.login-subtitle{color:var(--text-secondary);margin-bottom:32px;font-size:15px}.login-btn-container{display:flex;justify-content:center}.app-container{display:flex;flex-direction:column;height:100vh;overflow:hidden}.app-header{display:flex;align-items:center;justify-content:space-between;height:var(--header-height);padding:0 20px;background:#1576d2;border-bottom:3px solid #ff7c06;z-index:100;flex-shrink:0;position:relative}.app-header:after{content:"";position:absolute;top:0;left:-100%;width:60%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.07),transparent);animation:headerShine 6s ease-in-out infinite;pointer-events:none}@keyframes headerShine{0%,to{left:-60%}50%{left:100%}}.header-left{display:flex;align-items:center;gap:10px}.app-name{font-size:18px;font-weight:800;color:#fff;letter-spacing:.5px}.header-right{display:flex;align-items:center;gap:12px}.user-avatar{width:30px;height:30px;border-radius:50%;object-fit:cover}.user-avatar:hover{border-color:#fffc}.user-name{font-size:13px;color:#eee;font-weight:500}.btn-back-mobile{display:none}.btn-logout{color:#ffffffbf;transition:color .2s ease}.btn-logout:hover{color:#fff}.app-statusbar{display:flex;align-items:center;height:30px;padding:0 12px;flex-shrink:0;z-index:100;justify-content:center;position:relative;background:#fafdfe;border-top:1px solid #eee}.statusbar-links{position:absolute;left:12px;display:flex;align-items:center;gap:4px}.statusbar-links a{color:#999;text-decoration:none;font-size:11px;transition:color .2s}.statusbar-links a:hover{color:#1565c0}.statusbar-sep{color:#ccc;font-size:10px}.statusbar-loading{position:absolute;left:12px;top:50%;transform:translateY(-50%);display:flex;align-items:center}.statusbar-spinner{width:14px;height:14px;border:2px solid rgba(255,255,255,.25);border-top-color:#ffffffe6;border-radius:50%;animation:spin .7s linear infinite}.statusbar-brand{display:flex;align-items:end;gap:6px;text-decoration:none;color:#1675d1;font-size:11px;transition:color .2s ease}.statusbar-brand:hover{color:#1675d1}.statusbar-logo{height:25px;object-fit:contain;opacity:1}.statusbar-brand:hover .statusbar-logo{opacity:1}.app-main{display:flex;flex:1;overflow:hidden}.sidebar{width:var(--sidebar-width);min-width:var(--sidebar-width);background-color:#fcfcfc;border-right:1px solid var(--border-color);display:flex;flex-direction:column;overflow:hidden}.sidebar-header{padding:5px 12px;border-bottom:1px solid var(--border-light);display:flex;flex-direction:column;gap:3px}.search-box{display:flex;align-items:center;background:var(--bg-tertiary);border:1px solid var(--border-light);border-radius:var(--radius-sm);padding:0 8px;transition:border-color var(--transition)}.search-box:focus-within{border-color:var(--accent);background:var(--bg-secondary)}.search-icon{flex-shrink:0;color:var(--text-muted)}.search-input{flex:1;border:none;background:transparent;padding:7px 8px;font-size:13px;font-family:inherit;color:var(--text-primary);outline:none}.search-clear{display:flex;align-items:center;justify-content:center;width:20px;height:20px;border:none;background:transparent;color:var(--text-muted);cursor:pointer;font-size:12px;border-radius:50%}.search-clear:hover{background:var(--border-color);color:var(--text-primary)}.sidebar-actions{display:flex;gap:6px;flex-direction:row-reverse}.sidebar-actions .btn{border:none!important;color:#82addf!important}.sidebar-actions .btn:hover{background:none!important;color:#ff7d04!important}.sidebar-actions .btn-sm{padding:3px}.tree-container{flex:1;overflow-y:auto;padding:3px 10px}.tree-container::-webkit-scrollbar{width:6px}.tree-container::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:3px}.tree-container::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}.tree-folder{position:relative}.tree-item{display:flex;align-items:center;cursor:pointer;transition:background var(--transition);-webkit-user-select:none;user-select:none;min-height:20px;position:relative}.tree-item:hover,.tree-item.active{color:var(--accent)}.tree-icon{font-size:16px;flex-shrink:0;margin-right:4px;display:flex;align-items:center}.tree-name{flex:1;font-size:13px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;padding:8px 0}.tree-menu-btn{opacity:.6;border:none;background:transparent;cursor:pointer;color:var(--text-muted);font-size:16px;padding:2px 4px;border-radius:var(--radius-sm);flex-shrink:0;transition:all var(--transition)}.tree-item:hover .tree-menu-btn{opacity:1}.tree-menu-btn:hover{background:var(--border-color);color:var(--text-primary)}.tree-children{position:relative;margin-left:9px;padding-left:18px}.tree-children:before{content:"";position:absolute;left:0;top:0;bottom:0;width:1px;background:#b0bec5}.tree-children>:last-child:before{content:"";position:absolute;left:-18px;top:50%;bottom:0;width:1px;background:var(--bg-secondary);z-index:1}.tree-children>.tree-folder>.tree-item:after,.tree-children>.tree-item.tree-file:after{content:"";position:absolute;left:-18px;top:50%;width:14px;height:1px;background:#b0bec5}.tree-empty{padding:24px;text-align:center;color:var(--text-muted);font-size:13px}.editor-area{flex:1;display:flex;flex-direction:column;overflow:hidden;background:var(--bg-primary)}.editor-placeholder{display:flex;align-items:center;justify-content:center;flex:1}.placeholder-content{text-align:center;color:var(--text-muted)}.placeholder-logo{width:120px;height:auto;opacity:.4;margin-bottom:16px}.editor-content{display:flex;flex-direction:column;flex:1;overflow:hidden}.editor-toolbar{display:flex;align-items:center;justify-content:space-between;padding:8px 16px;background:var(--bg-secondary);border-bottom:1px solid var(--border-light);flex-shrink:0}.editor-filename{font-size:14px;font-weight:600;color:var(--text-primary);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.editor-breadcrumb{display:flex;align-items:center;overflow:hidden;min-width:0}.breadcrumb-path{font-size:12px;color:var(--text-muted);white-space:nowrap;flex-shrink:1;overflow:hidden;text-overflow:ellipsis;display:flex;align-items:center;gap:2px}.breadcrumb-path:not(:empty){margin-right:6px}.breadcrumb-path .breadcrumb-item{color:var(--text-muted)}.breadcrumb-path .breadcrumb-sep{margin:0 3px;color:var(--border-color)}.attachment-bar{display:flex;align-items:center;gap:8px;padding:6px 16px;background:var(--bg-secondary);border-bottom:1px solid var(--border-light);flex-shrink:0;flex-wrap:wrap;min-height:36px}.attachment-list{display:flex;flex-wrap:wrap;gap:6px;align-items:center}.attachment-chip{display:inline-flex;align-items:center;gap:4px;padding:3px 8px;background:var(--accent-subtle);border:1px solid var(--accent-light);border-radius:20px;font-size:12px;max-width:200px;transition:all var(--transition)}.attachment-chip:hover{background:var(--accent-light);border-color:var(--accent)}.attachment-name{display:inline-flex;align-items:center;gap:4px;color:var(--accent);text-decoration:none;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:160px}.attachment-name:hover{text-decoration:underline}.attachment-delete{border:none;background:transparent;color:var(--text-muted);cursor:pointer;font-size:10px;padding:1px 3px;border-radius:50%;line-height:1;transition:all var(--transition)}.attachment-delete:hover{background:var(--danger-bg);color:var(--danger)}.attachment-add-btn{display:inline-flex;align-items:center;gap:4px;padding:3px 10px;border:1px dashed var(--border-color);border-radius:20px;background:transparent;color:var(--text-muted);font-size:12px;cursor:pointer;font-family:inherit;transition:all var(--transition)}.attachment-add-btn:hover{border-color:var(--accent);color:var(--accent);background:var(--accent-subtle)}.attachment-add-btn:disabled{opacity:.5;cursor:not-allowed}.editor-body{flex:1;overflow:hidden;display:flex;flex-direction:column;min-height:0;position:relative}.editor-body .tox.tox-tinymce{flex:1;min-height:400px;border:none!important;border-radius:0!important}.tox .tox-edit-area{height:500px!important;min-height:500px!important}.tox .tox-edit-area:before{border:1px solid #f0f5fb!important;border-radius:0!important;content:""}.editor-plain{flex:1;width:100%;border:none;padding:16px;font-family:SF Mono,Fira Code,Cascadia Code,Consolas,monospace;font-size:14px;line-height:1.6;color:var(--text-primary);background:var(--bg-secondary);resize:none;outline:none}.modal-overlay{display:none;position:fixed;top:0;right:0;bottom:0;left:0;background:#0006;z-index:1000;align-items:center;justify-content:center;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px)}.modal-overlay.active{display:flex}.modal{background:var(--bg-secondary);border-radius:var(--radius-md);box-shadow:var(--shadow-lg);width:90%;max-width:420px;padding:24px;animation:modal-in .2s ease}@keyframes modal-in{0%{opacity:0;transform:scale(.95) translateY(-10px)}to{opacity:1;transform:scale(1) translateY(0)}}.modal-title{font-size:16px;font-weight:600;margin-bottom:12px}.modal-body{margin-bottom:20px;color:var(--text-secondary);font-size:14px}.modal-body p{margin-bottom:8px}.modal-input{width:100%;padding:9px 12px;border:1px solid var(--border-color);border-radius:var(--radius-sm);font-size:14px;font-family:inherit;color:var(--text-primary);outline:none;transition:border-color var(--transition)}.modal-input:focus{border-color:var(--accent);box-shadow:0 0 0 3px #1565c01a}.modal-actions{display:flex;justify-content:flex-end;gap:8px}.move-list{max-height:300px;overflow-y:auto;border:1px solid var(--border-color);border-radius:var(--radius-sm)}.move-item{display:block;width:100%;padding:10px 12px;border:none;background:transparent;text-align:left;font-size:13px;font-family:inherit;color:var(--text-primary);cursor:pointer;transition:background var(--transition)}.move-item:hover{background:var(--accent-light)}.move-item+.move-item{border-top:1px solid var(--border-light)}.context-menu{position:fixed;background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius-md);box-shadow:var(--shadow-md);min-width:180px;padding:4px;z-index:500;animation:ctx-in .15s ease}@keyframes ctx-in{0%{opacity:0;transform:scale(.95)}to{opacity:1;transform:scale(1)}}.context-menu-item{display:flex;align-items:center;gap:8px;width:100%;padding:8px 12px;border:none;background:transparent;font-size:13px;font-family:inherit;color:var(--text-primary);cursor:pointer;border-radius:var(--radius-sm);transition:background var(--transition)}.context-menu-item:hover{background:var(--bg-tertiary)}.context-menu-item.danger{color:var(--danger)}.context-menu-item.danger:hover{background:var(--danger-bg)}.context-menu-icon{font-size:14px;width:18px;text-align:center}.context-menu-separator{height:1px;background:var(--border-light);margin:4px 8px}.loading-overlay{display:none;position:fixed;top:0;right:0;bottom:0;left:0;background:#fff9;z-index:2000;align-items:center;justify-content:center;-webkit-backdrop-filter:blur(1px);backdrop-filter:blur(1px)}.loading-overlay.active{display:flex}.spinner{width:36px;height:36px;border:3px solid var(--border-color);border-top-color:var(--accent);border-radius:50%;animation:spin .7s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.toast-container{position:fixed;bottom:20px;right:20px;z-index:3000;display:flex;flex-direction:column;gap:8px}.toast{display:flex;align-items:center;gap:8px;padding:12px 16px;background:var(--bg-secondary);border-radius:var(--radius-md);box-shadow:var(--shadow-md);font-size:13px;transform:translate(120%);transition:transform .3s ease;border-left:3px solid var(--accent)}.toast.show{transform:translate(0)}.toast-success{border-left-color:var(--success)}.toast-error{border-left-color:var(--danger)}.toast-icon{font-size:16px;flex-shrink:0}@media(max-width:768px){.sidebar{position:fixed;inset:var(--header-height) 0 0 0;width:100%;min-width:unset;z-index:50;transform:translate(0);transition:transform .3s ease}.editor-area{position:fixed;inset:var(--header-height) 0 0 0;z-index:49;transform:translate(100%);transition:transform .3s ease}.app-container.file-open .sidebar{transform:translate(-100%)}.app-container.file-open .editor-area{transform:translate(0)}.app-container.file-open .btn-back-mobile{display:flex}.user-name{display:none}.app-statusbar{position:fixed;bottom:0;left:0;right:0;z-index:200;flex-direction:column;height:auto;padding:6px 12px;gap:2px}.statusbar-links{position:static;justify-content:center}}@media(max-width:480px){.login-card{padding:32px 24px}.login-title{font-size:24px}}