:root{--bg-primary: #0f0f0f;--bg-secondary: #1a1a1a;--bg-tertiary: #242424;--bg-hover: #2a2a2a;--bg-active: #333333;--text-primary: #f5f5f5;--text-secondary: #a0a0a0;--text-muted: #666666;--border-color: #333333;--border-light: #404040;--accent-color: #6366f1;--accent-hover: #818cf8;--danger-color: #ef4444;--success-color: #10b981;--sidebar-width: 260px;--list-width: 320px;--radius-sm: 6px;--radius-md: 8px;--radius-lg: 12px;--font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif}*{margin:0;padding:0;box-sizing:border-box}html,body,#root{height:100%}body{font-family:var(--font-sans);background-color:var(--bg-primary);color:var(--text-primary);line-height:1.5}.app{display:flex;height:100%;overflow:hidden}.app.loading{align-items:center;justify-content:center}.sidebar{width:var(--sidebar-width);background-color:var(--bg-secondary);border-right:1px solid var(--border-color);display:flex;flex-direction:column;flex-shrink:0}.sidebar-header{padding:20px;border-bottom:1px solid var(--border-color)}.app-logo{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:600;color:var(--text-primary)}.app-logo svg{color:var(--accent-color)}.sidebar-nav{flex:1;overflow-y:auto;padding:16px 12px}.nav-section{margin-bottom:24px}.nav-section-header{display:flex;align-items:center;justify-content:space-between;padding:8px 12px;font-size:12px;font-weight:600;text-transform:uppercase;color:var(--text-muted);letter-spacing:.5px}.icon-btn{display:flex;align-items:center;justify-content:center;width:24px;height:24px;background:none;border:none;color:var(--text-muted);cursor:pointer;border-radius:var(--radius-sm);transition:all .15s ease}.icon-btn:hover{background-color:var(--bg-hover);color:var(--text-primary)}.add-input{display:flex;gap:8px;padding:8px 12px}.add-input input{flex:1;padding:6px 10px;background-color:var(--bg-tertiary);border:1px solid var(--border-color);border-radius:var(--radius-sm);color:var(--text-primary);font-size:13px}.add-input input:focus{outline:none;border-color:var(--accent-color)}.add-input button{display:flex;align-items:center;justify-content:center;width:28px;height:28px;background-color:var(--accent-color);border:none;border-radius:var(--radius-sm);color:#fff;cursor:pointer;transition:background-color .15s ease}.add-input button:hover{background-color:var(--accent-hover)}.nav-item{display:flex;align-items:center;gap:10px;width:100%;padding:10px 12px;background:none;border:none;border-radius:var(--radius-md);color:var(--text-secondary);font-size:14px;cursor:pointer;transition:all .15s ease;text-align:left}.nav-item:hover{background-color:var(--bg-hover);color:var(--text-primary)}.nav-item.active{background-color:var(--bg-active);color:var(--text-primary)}.tag-list{display:flex;flex-wrap:wrap;gap:6px;padding:8px 12px}.tag-chip{display:flex;align-items:center;gap:6px;padding:4px 10px;background-color:var(--bg-tertiary);border:1px solid var(--border-color);border-radius:20px;font-size:12px;color:var(--text-secondary)}.tag-dot{width:6px;height:6px;border-radius:50%}.sidebar-footer{padding:16px 20px;border-top:1px solid var(--border-color);font-size:12px;color:var(--text-muted)}.main-content{flex:1;display:flex;overflow:hidden}.note-list-panel{width:var(--list-width);background-color:var(--bg-secondary);border-right:1px solid var(--border-color);display:flex;flex-direction:column;flex-shrink:0}.editor-panel{flex:1;display:flex;flex-direction:column;background-color:var(--bg-primary);overflow:hidden}.search-bar{display:flex;align-items:center;gap:12px;padding:16px;border-bottom:1px solid var(--border-color)}.search-input-wrapper{flex:1;position:relative;display:flex;align-items:center}.search-icon{position:absolute;left:12px;color:var(--text-muted);pointer-events:none}.search-input{width:100%;padding:10px 12px 10px 38px;background-color:var(--bg-tertiary);border:1px solid var(--border-color);border-radius:var(--radius-md);color:var(--text-primary);font-size:14px}.search-input:focus{outline:none;border-color:var(--accent-color)}.search-input::placeholder{color:var(--text-muted)}.create-btn{display:flex;align-items:center;justify-content:center;width:40px;height:40px;background-color:var(--accent-color);border:none;border-radius:var(--radius-md);color:#fff;cursor:pointer;transition:background-color .15s ease;flex-shrink:0}.create-btn:hover{background-color:var(--accent-hover)}.note-list{flex:1;overflow-y:auto;padding:8px}.note-list-empty{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;color:var(--text-muted);gap:12px}.note-item{padding:14px;margin-bottom:6px;background-color:transparent;border-radius:var(--radius-md);cursor:pointer;transition:all .15s ease;border:1px solid transparent}.note-item:hover{background-color:var(--bg-hover)}.note-item.selected{background-color:var(--bg-tertiary);border-color:var(--border-light)}.note-item-header{display:flex;align-items:flex-start;justify-content:space-between;gap:8px;margin-bottom:6px}.note-title{font-size:14px;font-weight:600;color:var(--text-primary);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;flex:1}.note-delete{display:flex;align-items:center;justify-content:center;width:24px;height:24px;background:none;border:none;color:var(--text-muted);cursor:pointer;border-radius:var(--radius-sm);opacity:0;transition:all .15s ease}.note-item:hover .note-delete{opacity:1}.note-delete:hover{background-color:var(--danger-color);color:#fff}.note-preview{font-size:13px;color:var(--text-secondary);line-height:1.4;margin-bottom:10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.note-meta{display:flex;align-items:center;justify-content:space-between}.note-date{font-size:11px;color:var(--text-muted)}.note-tags{display:flex;gap:4px}.note-tag{padding:2px 8px;background-color:var(--bg-hover);border-radius:10px;font-size:10px;color:var(--text-secondary)}.note-editor{flex:1;display:flex;flex-direction:column;overflow:hidden}.editor-header{display:flex;align-items:center;justify-content:space-between;padding:20px 24px 12px;border-bottom:1px solid var(--border-color)}.title-input{flex:1;padding:8px 0;background:none;border:none;color:var(--text-primary);font-size:24px;font-weight:600}.title-input:focus{outline:none}.title-input::placeholder{color:var(--text-muted)}.timestamp{font-size:12px;color:var(--text-muted);white-space:nowrap;margin-left:16px}.editor-tags{display:flex;flex-wrap:wrap;align-items:center;gap:8px;padding:12px 24px;position:relative}.tag-badge{display:flex;align-items:center;gap:6px;padding:4px 10px;border:1px solid;border-radius:20px;font-size:12px}.tag-remove{display:flex;align-items:center;justify-content:center;background:none;border:none;color:inherit;cursor:pointer;padding:0;opacity:.6}.tag-remove:hover{opacity:1}.add-tag-btn{display:flex;align-items:center;gap:4px;padding:4px 10px;background:none;border:1px dashed var(--border-light);border-radius:20px;color:var(--text-muted);font-size:12px;cursor:pointer;transition:all .15s ease}.add-tag-btn:hover{border-color:var(--accent-color);color:var(--accent-color)}.tag-picker{position:absolute;top:100%;left:24px;padding:8px;background-color:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius-md);box-shadow:0 4px 12px #0000004d;z-index:100;min-width:160px}.tag-option{display:flex;align-items:center;gap:8px;width:100%;padding:8px 12px;background:none;border:none;border-radius:var(--radius-sm);color:var(--text-secondary);font-size:13px;cursor:pointer;text-align:left}.tag-option:hover{background-color:var(--bg-hover);color:var(--text-primary)}.tag-option.selected{background-color:var(--bg-active);color:var(--text-primary)}.no-tags{padding:8px 12px;font-size:12px;color:var(--text-muted)}.editor-content{flex:1;padding:16px 24px;overflow-y:auto}.content-textarea{width:100%;min-height:300px;padding:0;background:none;border:none;color:var(--text-primary);font-size:15px;line-height:1.7;resize:none;font-family:var(--font-sans)}.content-textarea:focus{outline:none}.content-textarea::placeholder{color:var(--text-muted)}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;color:var(--text-muted);text-align:center;padding:40px}.empty-icon{margin-bottom:20px;opacity:.3}.empty-state h2{font-size:18px;font-weight:600;color:var(--text-secondary);margin-bottom:8px}.empty-state p{font-size:14px;margin-bottom:24px}.btn-primary{padding:12px 24px;background-color:var(--accent-color);border:none;border-radius:var(--radius-md);color:#fff;font-size:14px;font-weight:500;cursor:pointer;transition:background-color .15s ease}.btn-primary:hover{background-color:var(--accent-hover)}.loader{width:40px;height:40px;border:3px solid var(--border-color);border-top-color:var(--accent-color);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background-color:var(--border-light);border-radius:4px}::-webkit-scrollbar-thumb:hover{background-color:var(--text-muted)}@media(max-width:768px){.sidebar{position:fixed;left:-100%;z-index:1000;transition:left .3s ease}.sidebar.open{left:0}.note-list-panel{width:100%;border-right:none}.editor-panel{display:none}.editor-panel.active{display:flex;position:fixed;inset:0;z-index:999}}