CSS class starting with number is not getting applied

Question

I\'m trying to create a webpage that contains images. However, I want all the images to be the same size and in the same format. I have the following CSS class which applies

Answer 1

you Should not begin class name with number preferably.for fix it ,change class name.

.img-container {
    border: thin solid #C4C4C4;
    border-radius: 10px;
    overflow: hidden;
    margin-left: auto;
    margin-right: auto;
}

.c200 {
    width: 200px;
    height: 200px;
}