.site-header {
    min-height: 4.5rem;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: .5rem 2.5rem;
    padding: .75rem max(1.5rem, calc((100vw - 86rem) / 2));
    border-bottom: 1px solid var(--color-border-subtle);
    background: var(--color-header);
    font-family: var(--font-mono);
    font-size: .8125rem;
}
.site-brand { display: inline-flex; align-items: center; gap: .75rem; color: var(--color-text); font-size: 1rem; font-weight: 600; text-decoration: none; }
.site-brand__mark { display: grid; place-items: center; width: 2rem; height: 2rem; color: var(--color-header); background: var(--color-accent); border-radius: 6px; font-size: 1.3rem; }
.site-brand__suffix { color: var(--color-muted); font-weight: 400; }
.site-nav { display: flex; align-items: center; flex-wrap: wrap; gap: .25rem; }
.site-nav--account { margin-left: auto; }
.site-nav a, .site-nav [aria-disabled] {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: .75rem;
    min-height: 2.75rem;
    padding: .5rem .875rem;
    border-radius: 5px;
    color: var(--color-muted);
    text-decoration: none;
    transition: color .15s, background .15s;
}
.site-nav a:hover { color: var(--color-text); background: var(--color-header-hover); }
.site-nav .site-nav__active { color: var(--color-accent); background: var(--color-accent-surface); }
.site-nav--account a { color: var(--color-text-soft); }
.site-nav--account button { min-height: 2.75rem; padding: .5rem .875rem; border: 0; border-radius: 5px; background: transparent; color: var(--color-text-soft); cursor: pointer; }
.site-nav--account button:hover { background: var(--color-header-hover); color: var(--color-text); }
.site-nav [aria-disabled] { opacity: .6; cursor: default; }
@media (max-width: 48rem) {
    .site-header { gap: .5rem 1rem; padding: .75rem 1.25rem; }
    .site-header:has(.site-brand) > .site-nav:not(.site-nav--account) { order: 3; flex-basis: 100%; }
    .site-nav a, .site-nav [aria-disabled] { padding-inline: .75rem; }
}