a.pdf-link {
    display: inline-block;
    margin-top: 0.5rem;
    padding: 0.5rem 1rem;
    border: 1px solid #222;
    border-radius: 8px;
    text-decoration: none;
    font-size: 0.9rem;
    transition: all 0.3s;
}

a.pdf-link:hover {
    background: #222;
    color: #fff;
}