* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

        body {
            background: linear-gradient(135deg, #6a11cb 0%, #2575fc 100%);
            min-height: 100vh;
            display: flex;
            justify-content: center;
            align-items: flex-start;
            padding: 40px 20px;
            color: #333;
        }

        .container {
            width: 100%;
            max-width: 500px;
            background: white;
            border-radius: 16px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
            overflow: hidden;
        }

        header {
            background: #4a6fc7;
            color: white;
            padding: 25px 20px;
            text-align: center;
        }

        h1 {
            font-size: 28px;
            margin-bottom: 5px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
        }

        .subtitle {
            font-size: 14px;
            opacity: 0.9;
        }

        .input-section {
            padding: 20px;
            border-bottom: 1px solid #eee;
            display: flex;
            gap: 10px;
        }

        #task-input {
            flex: 1;
            padding: 14px;
            border: 2px solid #ddd;
            border-radius: 8px;
            font-size: 16px;
            transition: border-color 0.3s;
        }

        #task-input:focus {
            outline: none;
            border-color: #4a6fc7;
        }

        #add-btn {
            background: #4a6fc7;
            color: white;
            border: none;
            border-radius: 8px;
            padding: 0 20px;
            cursor: pointer;
            font-size: 16px;
            transition: background 0.3s;
        }

        #add-btn:hover {
            background: #3b5aa6;
        }

        .tasks-section {
            padding: 20px;
        }

        .section-title {
            font-size: 18px;
            margin-bottom: 15px;
            color: #4a6fc7;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        #tasks-list {
            list-style-type: none;
            max-height: 400px;
            overflow-y: auto;
        }

        .task-item {
            display: flex;
            align-items: center;
            padding: 15px;
            margin-bottom: 12px;
            background: #f8f9fa;
            border-radius: 8px;
            box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
            transition: transform 0.2s, box-shadow 0.2s;
        }

        .task-item:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
        }

        .task-checkbox {
            margin-right: 15px;
            width: 20px;
            height: 20px;
            cursor: pointer;
        }

        .task-text {
            flex: 1;
            font-size: 16px;
            word-break: break-word;
        }

        .completed .task-text {
            text-decoration: line-through;
            color: #888;
        }

        .task-actions {
            display: flex;
            gap: 10px;
        }

        .task-actions button {
            background: none;
            border: none;
            cursor: pointer;
            font-size: 16px;
            color: #6c757d;
            transition: color 0.3s;
            width: 32px;
            height: 32px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .edit-btn:hover {
            color: #ffc107;
            background: #fff9e6;
        }

        .delete-btn:hover {
            color: #dc3545;
            background: #ffe6e6;
        }

        .empty-state {
            text-align: center;
            padding: 30px;
            color: #6c757d;
        }

        .empty-state i {
            font-size: 50px;
            margin-bottom: 15px;
            color: #ced4da;
        }

        .empty-state p {
            font-size: 16px;
        }

        footer {
            padding: 20px;
            text-align: center;
            color: #6c757d;
            font-size: 14px;
            border-top: 1px solid #eee;
        }

        .edit-input {
            flex: 1;
            padding: 10px;
            border: 2px solid #4a6fc7;
            border-radius: 6px;
            font-size: 16px;
        }

        @media (max-width: 500px) {
            .container {
                border-radius: 12px;
            }
            
            h1 {
                font-size: 24px;
            }
            
            .input-section {
                flex-direction: column;
            }
            
            #add-btn {
                padding: 12px;
            }
        }