:root{--bg-primary: #121212;--bg-secondary: #1a1a1a;--bg-tertiary: #242424;--bg-hover: #2d2d2d;--bg-active: #333333;--text-primary: #e0e0e0;--text-secondary: #999999;--text-muted: #666666;--border-color: #333333;--accent-color: #6366f1;--accent-hover: #5558e3;--danger-color: #ef4444;--success-color: #22c55e}[data-theme=light]{--bg-primary: #ffffff;--bg-secondary: #f8f9fa;--bg-tertiary: #f0f1f3;--bg-hover: #e9ecef;--bg-active: #dee2e6;--text-primary: #1a1a1a;--text-secondary: #4a5568;--text-muted: #718096;--border-color: #e2e8f0;--accent-color: #6366f1;--accent-hover: #5558e3;--danger-color: #ef4444;--success-color: #22c55e}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica 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.15s}button:hover{background-color:var(--accent-hover)}button:disabled{background-color:var(--bg-active);color:var(--text-muted);cursor:not-allowed}.error{color:var(--danger-color);font-size:14px;margin-top:10px;margin-bottom:16px}.success{color:var(--success-color);font-size:14px;margin-top:5px}.link{color:var(--accent-color);text-decoration:none;cursor:pointer}.link:hover{text-decoration:underline}.text-center{text-align:center}.mt-2{margin-top:16px}.loading-screen{min-height:100vh;display:flex;align-items:center;justify-content:center;background:var(--bg-primary);color:var(--text-secondary);font-size:16px}.app-layout{display:flex;height:100vh;overflow:hidden}.sidebar{width:220px;background: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)}.sidebar-logo{font-size:20px;font-weight:700;color:var(--accent-color);margin:0}.sidebar-nav{flex:1;overflow-y:auto;padding:12px 0}.sidebar-section{margin-bottom:16px}.sidebar-section-header{padding:8px 20px;font-size:11px;font-weight:600;text-transform:uppercase;color:var(--text-muted);letter-spacing:.5px}.sidebar-item{display:flex;align-items:center;gap:10px;width:100%;padding:10px 20px;background:none;border:none;color:var(--text-secondary);font-size:14px;cursor:pointer;text-align:left;transition:background-color .15s,color .15s}.sidebar-item:hover{background:var(--bg-hover);color:var(--text-primary)}.sidebar-item.active{background:var(--bg-active);color:var(--text-primary)}.sidebar-icon{font-size:16px;width:20px;text-align:center}.sidebar-label{flex:1}.sidebar-count{font-size:12px;color:var(--text-muted);background:var(--bg-tertiary);padding:2px 8px;border-radius:10px}.sidebar-color-dot{width:10px;height:10px;border-radius:50%;flex-shrink:0}.sidebar-footer{border-top:1px solid var(--border-color);padding:8px 0}.sidebar-add-category{display:flex;align-items:center;gap:8px;width:calc(100% - 24px);margin:4px 12px;padding:8px 12px;background:none;border:1px dashed var(--border-color);border-radius:6px;color:var(--text-muted);font-size:13px;cursor:pointer;transition:all .15s}.sidebar-add-category:hover{background:var(--bg-hover);border-color:var(--text-muted);color:var(--text-secondary)}.notes-list{width:300px;background:var(--bg-primary);border-right:1px solid var(--border-color);display:flex;flex-direction:column;flex-shrink:0}.notes-list-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid 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var(--border-color)}.sidebar-nav{display:flex;flex-wrap:wrap;padding:8px;gap:4px}.sidebar-section{display:flex;flex-wrap:wrap;gap:4px;margin-bottom:0}.sidebar-section-header{display:none}.sidebar-item{width:auto;padding:8px 12px;border-radius:6px}.sidebar-footer{display:flex;border-top:none;padding:8px;gap:4px}.sidebar-add-category{width:auto;margin:0}.notes-list{width:100%;height:300px;border-right:none;border-bottom:1px solid var(--border-color)}.note-editor{flex:1}}.connection-status{position:fixed;bottom:16px;right:16px;display:flex;align-items:center;gap:8px;padding:8px 14px;background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:20px;font-size:12px;font-weight:500;box-shadow:0 4px 12px #0000004d;z-index:1000;animation:slideIn .2s ease-out}@keyframes slideIn{0%{transform:translateY(10px);opacity:0}to{transform:translateY(0);opacity:1}}.connection-status-dot{width:8px;height:8px;border-radius:50%}.connection-status.connecting .connection-status-dot,.connection-status.reconnecting .connection-status-dot{background:#f59e0b;animation:pulse 1.5s ease-in-out infinite}.connection-status.disconnected .connection-status-dot{background:#ef4444}@keyframes pulse{0%,to{opacity:1}50%{opacity:.4}}.connection-status.connecting .connection-status-label,.connection-status.reconnecting .connection-status-label{color:#f59e0b}.connection-status.disconnected .connection-status-label{color:#ef4444}