* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            min-height: 100vh;
            color: #333;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px;
        }

        .header {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-radius: 15px;
            padding: 20px;
            margin-bottom: 20px;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .header h1 {
            color: #4a5568;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .user-info {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .connection-status {
            display: flex;
            align-items: center;
            gap: 5px;
            padding: 5px 10px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: bold;
        }

        .connection-status.connected {
            background: #48bb78;
            color: white;
        }

        .connection-status.disconnected {
            background: #f56565;
            color: white;
        }

        .main-content {
            display: grid;
            grid-template-columns: 1fr 2fr;
            gap: 20px;
        }

        .sidebar {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-radius: 15px;
            padding: 20px;
            height: fit-content;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
        }

        .todo-section {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-radius: 15px;
            padding: 20px;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
        }

        .btn {
            padding: 10px 20px;
            border: none;
            border-radius: 8px;
            cursor: pointer;
            font-weight: 500;
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            text-decoration: none;
        }

        .btn-primary {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
        }

        .btn-success {
            background: #48bb78;
            color: white;
        }

        .btn-danger {
            background: #f56565;
            color: white;
        }

        .btn-secondary {
            background: #e2e8f0;
            color: #4a5568;
        }

        .form-group {
            margin-bottom: 15px;
        }

        .form-group label {
            display: block;
            margin-bottom: 5px;
            font-weight: 500;
            color: #4a5568;
        }

        .form-control {
            width: 100%;
            padding: 12px;
            border: 2px solid #e2e8f0;
            border-radius: 8px;
            font-size: 14px;
            transition: border-color 0.3s ease;
        }

        .form-control:focus {
            outline: none;
            border-color: #667eea;
            box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
        }

        .todo-item {
            background: #f8f9fa;
            border-radius: 10px;
            padding: 15px;
            margin-bottom: 10px;
            border-left: 4px solid #667eea;
            transition: all 0.3s ease;
        }

        .todo-item:hover {
            transform: translateX(5px);
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        }

        .todo-item.completed {
            opacity: 0.6;
            border-left-color: #48bb78;
            text-decoration: line-through;
        }

        .todo-item.high-priority {
            border-left-color: #f56565;
        }

        .todo-item.medium-priority {
            border-left-color: #ed8936;
        }

        .todo-item.low-priority {
            border-left-color: #48bb78;
        }

        .todo-header {
            display: flex;
            justify-content: space-between;
            align-items: flex-start;
            margin-bottom: 10px;
        }

        .todo-title {
            font-weight: 600;
            color: #2d3748;
            margin-bottom: 5px;
        }

        .todo-meta {
            font-size: 12px;
            color: #718096;
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }

        .todo-actions {
            display: flex;
            gap: 5px;
        }

        .btn-sm {
            padding: 5px 10px;
            font-size: 12px;
        }

        .modal {
            display: none;
            position: fixed;
            z-index: 1000;
            left: 0;
            top: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.5);
            backdrop-filter: blur(5px);
        }

        .modal.show {
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .modal-content {
            background: white;
            border-radius: 15px;
            padding: 25px;
            width: 90%;
            max-width: 500px;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
        }

        .modal-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 20px;
        }

        .close {
            cursor: pointer;
            font-size: 24px;
            color: #718096;
        }

        .filter-section {
            margin-bottom: 20px;
        }

        .filter-buttons {
            display: flex;
            gap: 5px;
            flex-wrap: wrap;
            margin-bottom: 10px;
        }

        .filter-btn {
            padding: 5px 12px;
            border: 1px solid #e2e8f0;
            background: white;
            border-radius: 20px;
            cursor: pointer;
            font-size: 12px;
            transition: all 0.3s ease;
        }

        .filter-btn.active {
            background: #667eea;
            color: white;
            border-color: #667eea;
        }

        .search-box {
            margin-bottom: 15px;
        }

        .notification {
            position: fixed;
            top: 20px;
            right: 20px;
            padding: 15px 20px;
            border-radius: 10px;
            color: white;
            font-weight: 500;
            z-index: 2000;
            transform: translateX(400px);
            opacity: 0;
            transition: all 0.3s ease;
        }

        .notification.show {
            transform: translateX(0);
            opacity: 1;
        }

        .notification.success {
            background: #48bb78;
        }

        .notification.error {
            background: #f56565;
        }

        .notification.info {
            background: #4299e1;
        }

        .notification.warning {
            background: #ed8936;
        }

        .reminder-popup {
            position: fixed;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            background: white;
            border-radius: 15px;
            padding: 25px;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
            z-index: 3000;
            min-width: 400px;
            border: 3px solid #f56565;
            animation: reminderPulse 1s infinite alternate;
        }

        @keyframes reminderPulse {
            from { box-shadow: 0 20px 40px rgba(245, 101, 101, 0.3); }
            to { box-shadow: 0 20px 40px rgba(245, 101, 101, 0.6); }
        }

        .login-container {
            display: flex;
            align-items: center;
            justify-content: center;
            min-height: 100vh;
        }

        .login-form {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-radius: 15px;
            padding: 40px;
            width: 400px;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
        }

        .login-form h2 {
            text-align: center;
            margin-bottom: 30px;
            color: #4a5568;
        }

        .tabs {
            display: flex;
            margin-bottom: 20px;
            border-bottom: 2px solid #e2e8f0;
        }

        .tab {
            flex: 1;
            padding: 10px;
            text-align: center;
            cursor: pointer;
            border-bottom: 2px solid transparent;
            transition: all 0.3s ease;
        }

        .tab.active {
            border-bottom-color: #667eea;
            color: #667eea;
        }

        .pagination {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 10px;
            margin-top: 20px;
        }

        .page-btn {
            padding: 8px 12px;
            border: 1px solid #e2e8f0;
            background: white;
            border-radius: 5px;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .page-btn:hover, .page-btn.active {
            background: #667eea;
            color: white;
            border-color: #667eea;
        }

        .loading {
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 20px;
        }

        .spinner {
            border: 3px solid #f3f3f3;
            border-top: 3px solid #667eea;
            border-radius: 50%;
            width: 30px;
            height: 30px;
            animation: spin 1s linear infinite;
        }

        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }

        @media (max-width: 768px) {
            .main-content {
                grid-template-columns: 1fr;
            }
            
            .header {
                flex-direction: column;
                gap: 15px;
                text-align: center;
            }
            
            .modal-content {
                width: 95%;
                padding: 20px;
            }
        } 
		
		/* 样式补充 *//* 样式补充 *//* 样式补充 */
		.badge {
		     display: inline-block;
		     padding: 4px 8px;
		     font-size: 12px;
		     font-weight: 500;
		     color: white;
		     background: #667eea;
		     border-radius: 12px;
		     margin-right: 8px;
		 }
		
		 .priority-badge {
		     font-size: 10px;
		     padding: 2px 6px;
		     border-radius: 10px;
		     color: white;
		     font-weight: bold;
		 }
		
		.priority-Low { background: #48bb78; }
		.priority-Medium { background: #ed8936; }
		.priority-High { background: #f56565; }
		
		 .todo-description {
		     margin-top: 10px;
		     color: #666;
		     font-size: 14px;
		     line-height: 1.4;
		 }
		
		 .group-item:hover {
		     background: #e2e8f0 !important;
		 }
		
		 .todo-stats {
		     display: flex;
		     gap: 10px;
		     align-items: center;
		 }
		
		 @media (max-width: 768px) {
		     .todo-header {
		         flex-direction: column;
		         gap: 10px;
		     }
		     
		     .todo-actions {
		         justify-content: flex-start;
		     }
		     
		     .filter-buttons {
		         flex-direction: column;
		     }
		     
		     .todo-stats {
		         flex-direction: column;
		         gap: 5px;
		     }
		 }