header {
    text-align: center;
}

header .logo {
    margin-top: 3rem;
    height: 5rem;
}

header,
main {
    max-width: 768px;
    margin-left: auto;
    margin-right: auto;
}

ul.links {
    padding-left: 0;
    list-style: none;
}

ul.links > li {
    margin-top: 0.5rem;
    margin-bottom: 0.5rem;
}

ul.buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.3rem;
    padding-left: 0;
    list-style: none;
}

.button,
.button a {
    display: inline-block;
    width: 88px;
    height: 31px;
    line-height: 1;
    text-decoration: none;
    vertical-align: middle;
}

.button img {
    width: 88px;
    height: 31px;
    object-fit: contain;
    image-rendering: crisp-edges;
}