* {
            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;
            padding: 20px;
        }

        .container {
            max-width: 800px;
            margin: 0 auto;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-radius: 20px;
            padding: 30px;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
        }

        h1 {
            text-align: center;
            color: #333;
            margin-bottom: 30px;
            font-size: 2.5rem;
            background: linear-gradient(135deg, #667eea, #764ba2);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .input-section {
            display: flex;
            gap: 10px;
            margin-bottom: 30px;
            flex-wrap: wrap;
        }

        .todo-input {
            flex: 1;
            min-width: 250px;
            padding: 15px;
            border: 2px solid #e1e5e9;
            border-radius: 12px;
            font-size: 16px;
            transition: all 0.3s ease;
            background: rgba(255, 255, 255, 0.9);
        }

        .todo-input:focus {
            outline: none;
            border-color: #667eea;
            box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
            transform: translateY(-2px);
        }

        .add-btn {
            padding: 15px 25px;
            background: linear-gradient(135deg, #667eea, #764ba2);
            color: white;
            border: none;
            border-radius: 12px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            transition: all 0.3s ease;
            min-width: 120px;
        }

        .add-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
        }

        .tabs {
            display: flex;
            margin-bottom: 20px;
            background: rgba(255, 255, 255, 0.7);
            border-radius: 12px;
            padding: 5px;
            gap: 5px;
        }

        .tab {
            flex: 1;
            padding: 12px;
            background: transparent;
            border: none;
            border-radius: 8px;
            cursor: pointer;
            font-size: 14px;
            font-weight: 600;
            transition: all 0.3s ease;
            color: #666;
        }

        .tab.active {
            background: linear-gradient(135deg, #667eea, #764ba2);
            color: white;
            transform: translateY(-1px);
        }

        .todo-list {
            min-height: 200px;
        }

        .todo-item {
            background: rgba(255, 255, 255, 0.9);
            margin-bottom: 10px;
            padding: 20px;
            border-radius: 15px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            transition: all 0.3s ease;
            border-left: 4px solid #667eea;
        }

        .todo-item:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
        }

        .todo-item.completed {
            opacity: 0.7;
            border-left-color: #28a745;
        }

        .todo-item.completed .todo-text {
            text-decoration: line-through;
            color: #666;
        }

        .todo-item.archived {
            border-left-color: #ffc107;
            background: rgba(255, 193, 7, 0.1);
        }

        .todo-text {
            flex: 1;
            font-size: 16px;
            color: #333;
            margin-right: 15px;
        }

        .todo-actions {
            display: flex;
            gap: 8px;
        }

        .action-btn {
            padding: 8px 12px;
            border: none;
            border-radius: 8px;
            cursor: pointer;
            font-size: 12px;
            font-weight: 600;
            transition: all 0.3s ease;
            text-transform: uppercase;
        }

        .complete-btn {
            background: #28a745;
            color: white;
        }

        .complete-btn:hover {
            background: #218838;
            transform: scale(1.05);
        }

        .archive-btn {
            background: #ffc107;
            color: #333;
            margin-right: 8px;
        }

        .archive-btn:hover {
            background: #e0a800;
            transform: scale(1.1);
        }

        .delete-btn {
            background: #dc3545;
            color: white;
        }

        .delete-btn:hover {
            background: #c82333;
            transform: scale(1.05);
        }

        .restore-btn {
            background: #17a2b8;
            color: white;
        }

        .restore-btn:hover {
            background: #138496;
            transform: scale(1.05);
        }

        .empty-state {
            text-align: center;
            padding: 40px;
            color: #666;
            font-style: italic;
        }

        .stats {
            display: flex;
            justify-content: space-around;
            margin-bottom: 20px;
            padding: 15px;
            background: rgba(255, 255, 255, 0.7);
            border-radius: 12px;
        }

        .stat {
            text-align: center;
        }

        .stat-number {
            font-size: 24px;
            font-weight: bold;
            color: #667eea;
        }

        .stat-label {
            font-size: 12px;
            color: #666;
            text-transform: uppercase;
        }

        @media (max-width: 600px) {
            .container {
                margin: 10px;
                padding: 20px;
            }

            h1 {
                font-size: 2rem;
            }

            .input-section {
                flex-direction: column;
            }

            .todo-input {
                min-width: auto;
            }

            .todo-item {
                flex-direction: column;
                align-items: stretch;
                gap: 15px;
            }

            .todo-actions {
                justify-content: center;
            }

            .stats {
                flex-direction: column;
                gap: 10px;
            }
        }