body { 
    font-family: Arial, sans-serif; 
    display: flex; 
    justify-content: center; 
    padding-top: 50px; 
    background-color: #f4f4f9; 
}

.container { 
    background: white; 
    padding: 2rem; 
    border-radius: 8px; 
    box-shadow: 0 4px 6px rgba(0,0,0,0.1); 
    width: 300px; 
}

.input-group { 
    display: flex; 
    gap: 5px; 
    margin-bottom: 20px; 
}

input { 
    flex: 1; 
    padding: 8px; 
    border: 1px solid #ddd; 
    border-radius: 4px; 
}

button#addBtn { 
    background: #28a745; 
    color: white; 
    border: none; 
    padding: 8px 12px; 
    border-radius: 4px; 
    cursor: pointer; 
}

ul { 
    list-style: none; 
    padding: 0; 
}

li { 
    background: #fff; 
    border-bottom: 1px solid #eee; 
    padding: 10px; 
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
}

.task-text { 
    cursor: pointer; 
    flex: 1; 
}

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

.del-btn { 
    background: #dc3545; 
    color: white; 
    border: none; 
    padding: 4px 8px; 
    border-radius: 4px; 
    cursor: pointer; 
    font-size: 12px; 
}