responsive nft card

the :hover pseudo-class is missing:

h1:hover, strong:hover{
color: aqua;
}

to make your span more aligned with the image, try to put the values ​​of width and height:

.image-section span {
    position: absolute;
    z-index: 100;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    cursor: pointer;
    border-radius: 15px;
    width: 100%;
    height: 98%;
    transition: background-color 0.25s ease;
}