/* Header — scrolls away with the page, semi-transparent, syncs with the warm-neutral palette */
header.site-header {
    position: static;
    z-index: 50;
    height: var(--header-height, 64px);
    background-color: var(--bgColor-default);
    border-bottom: 1px solid var(--borderColor-muted);
    backdrop-filter: saturate(180%) blur(8px);
    -webkit-backdrop-filter: saturate(180%) blur(8px);
    background-color: color-mix(in srgb, var(--bgColor-default) 88%, transparent);
}

.site-header__inner {
    max-width: var(--container-max, 1080px);
    height: 100%;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.site-header__brand {
    margin: 0;
    font-family: var(--serif);
    font-weight: 500;
    font-size: 1.5rem;
    letter-spacing: -0.01em;
    color: var(--fgColor-default);
    white-space: nowrap;
}

.site-header__brand a {
    color: inherit;
    text-decoration: none;
}

.site-header__nav {
    display: flex;
    gap: 0;
    flex-wrap: nowrap;
    justify-content: flex-end;
}

.navlink {
    padding: 6px 12px;
    color: var(--fgColor-muted);
    text-decoration: none;
    font-size: 0.95rem;
    border-radius: 999px;
    transition: color 0.15s ease, background-color 0.15s ease;
}

.navlink:hover,
.navlink:focus-visible {
    color: var(--fgColor-default);
    background-color: var(--bgColor-muted);
    outline: none;
}

.navlink.is-active {
    color: var(--fgColor-default);
    background-color: var(--bgColor-muted);
}

@media (max-width: 540px) {
    header.site-header {
        height: auto;
    }
    .site-header__inner {
        flex-direction: column;
        align-items: center;
        justify-content: center;
        padding: 12px 16px;
        gap: 8px;
    }
    .site-header__nav { justify-content: center; }
    .navlink { padding: 6px 10px; font-size: 0.9rem; }
}