img.showcase {
    border-style: solid;
    border-width: 3px;
    border-color: rgba(0, 0, 0, 0.4);
    border-radius: 2rem;
    box-shadow: 0.5px 0.5px 7px 3px;
    margin-left: auto;
    margin-right: auto;
    margin-top: 20px;
    width: 80%;
}

@media screen and (width >=545px) {
    img.showcase {
        border-style: solid;
        border-width: 3px;
        border-color: rgba(0, 0, 0, 0.4);
        border-radius: 2rem;
        box-shadow: 0.5px 0.5px 7px 3px;
        margin-left: auto;
        margin-right: auto;
        margin-top: 20px;
        margin-bottom: 15%;
        width: 80%;
    }
}