.social-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    margin: 0 auto;
    padding: 0;
    width: 210px;
    list-style: none;
}

@media (min-width: 600px) {
    .social-links {
        width: 430px;
    }
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 14px;
    width: 60px;
    height: 60px;
    font-size: 24px;
    color: #fdb924;
    border-radius: 50%;
    border: 2px solid #656565;
    transition: border-color 400ms cubic-bezier(0,0,0.3,1),
                color 400ms cubic-bezier(0,0,0.3,1);
}

.social-links a:hover {
    color: #fff;
    text-decoration: none;
    border: 2px solid #00A4EF;
}

@media (min-width: 800px) {
    .social-links a { margin-bottom: 0; }
}