/* One header and one navigation tree, shared by wide and compact layouts. */
.site-header {
    position: sticky;
    top: 0;
    z-index: var(--layer-header);
    background: var(--color-bg-main);
    border-bottom: 1px solid var(--color-border);
    color: var(--color-text-main);
}

.site-header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--site-header-gap);
    min-height: var(--site-header-height);
    position: relative;
}

.site-brand {
    display: flex;
    align-items: center;
    flex: 0 0 auto;
    width: 12.5rem;
    min-height: 44px;
    border-radius: var(--radius-sm);
    text-decoration: none;
}

.site-brand img {
    display: block;
    width: 100%;
    height: auto;
}

.site-menu {
    margin-left: auto;
}

.site-menu > summary {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: .5rem;
    min-height: 48px;
    padding: .65rem .85rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text-main);
    background: var(--color-bg-card);
    font: 600 .875rem/1 var(--font-family);
    list-style: none;
    cursor: pointer;
    touch-action: manipulation;
}

.site-menu > summary::-webkit-details-marker {
    display: none;
}

.site-menu[open] > summary,
.site-menu > summary:hover {
    border-color: var(--color-primary-light);
    background: var(--color-bg-elevated);
}

.site-menu-icon {
    flex: 0 0 24px;
}

.site-navigation {
    position: absolute;
    top: 100%;
    right: 1rem;
    display: flex;
    flex-direction: column;
    gap: .25rem;
    width: min(24rem, calc(100% - 2rem));
    max-height: calc(100vh - var(--site-header-height) - 1rem);
    max-height: calc(100dvh - var(--site-header-height) - 1rem);
    margin-top: .5rem;
    padding: .75rem;
    overflow-y: auto;
    overscroll-behavior: contain;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-bg-card);
    box-shadow: var(--shadow-card);
}

.site-navigation a {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    min-height: 44px;
    padding: .65rem .85rem;
    border-radius: var(--radius-sm);
    color: var(--color-text-soft);
    font: 600 .875rem/1.3 var(--font-family);
    white-space: nowrap;
    text-decoration: none;
    transition: background-color var(--transition-fast), color var(--transition-fast);
}

.site-navigation a:hover {
    color: var(--color-text-main);
    background: var(--color-bg-elevated);
}

.site-navigation a.site-nav-quote {
    justify-content: center;
    color: var(--white);
    background: var(--gradient-action);
}

.site-navigation a.site-nav-quote:hover {
    background: var(--action-blue-dark);
}

.site-header a:focus-visible,
.site-menu > summary:focus-visible {
    outline: 3px solid var(--focus-color);
    outline-offset: 3px;
}

.site-header[data-layout="desktop"] .site-menu {
    display: contents;
}

.site-header[data-layout="desktop"] .site-menu > summary {
    display: none;
}

.site-header[data-layout="desktop"] .site-navigation {
    position: static;
    flex-direction: row;
    align-items: center;
    gap: .25rem;
    width: auto;
    max-height: none;
    margin: 0;
    padding: 0;
    overflow: visible;
    border: 0;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
}

/* The temporary measurement is synchronous, hidden, and never moves content. */
.site-header.is-measuring .site-navigation {
    position: absolute;
    display: flex;
    flex-direction: row;
    width: max-content;
    max-width: none;
    max-height: none;
    margin: 0;
    padding: 0;
    overflow: visible;
    border: 0;
    visibility: hidden;
}

@media (max-width: 40rem) {
    :root {
        --site-header-height: 4.25rem;
    }

    .site-brand {
        width: 11rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    .site-navigation a {
        transition: none;
    }
}