.pdfs {
    text-align: center;
}

.pdfs img{
    margin: 1rem 0;
    border-radius: 15%;
    box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.19);
}