body {
    background-image: url('./vibrant-background.avif'); 
    background-repeat: no-repeat;
    background-size: cover;
    background-position: center;
    margin: 0;
    padding: 0;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
}

.todo-box {
    width: 100%;
    max-width: 500px;
    background-color: rgba(255, 255, 255, 0.9);
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

@media (max-width: 768px) {
    .todo-box {
        padding: 15px;
    }

    h1 {
        font-size: 24px;
    }

    button {
        padding: 8px 10px;
    }

    #task-input, #due-date, #category {
        font-size: 14px;
    }
}

@media (max-width: 576px) {
    .todo-box {
        padding: 10px;
    }

    h1 {
        font-size: 20px;
    }

    button {
        padding: 6px 8px;
    }

    #task-input, #due-date, #category {
        font-size: 12px;
    }
}

#task-list .task-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.task-item.completed {
    text-decoration: line-through;
    color: gray;
}

button {
    margin: 5px;
    padding: 5px 10px;
    font-size: 14px;
}