/* ============================================================
   Hyman Bloom Catalogue Raisonné — header.css
   Single source of truth for the site header.
   Include this on every page via header.php.
   ============================================================ */

.site-header {
    background: #F0EFEA;
    border-bottom: 3px solid #602E37;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 90px;
    position: sticky;
    top: 0;
    z-index: 100;
}

.site-header-inner {
    width: 100%;
    max-width: 1600px;
    padding: 0.6rem 2rem;
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    gap: 0.3rem 1.5rem;
}

.site-title {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    text-decoration: none;
}

.site-monogram {
    height: 44px;
    width: auto;
    display: block;
    opacity: 0.88;
}

.site-title-text {
    font-family: 'Libre Baskerville', serif;
    font-size: 0.9rem;
    font-weight: 700;
    color: #1a1a1a;
    letter-spacing: 0.01em;
    line-height: 1.45;
}

.site-title:hover .site-title-text {
    color: #602E37;
}

.site-title:hover .site-monogram {
    opacity: 1;
}

.site-title-stack {
    display: flex;
    flex-direction: column;
}

.site-subtitle {
    font-size: 0.7rem;
    color: #767676;
    font-family: 'Inter', sans-serif;
    letter-spacing: 0.03em;
    margin-top: 0.1rem;
}

.site-nav {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-group {
    display: inline-flex;
    align-items: center;
    gap: 0;
    border: 2px solid transparent;
    border-top: 3px solid transparent;
    border-radius: 2px;
    padding: 4px 8px;
    transition: border-color 0.15s, background 0.15s, box-shadow 0.15s;
}

.nav-group.active-volume {
    background: #fff;
    border-color: #D4D2CC;
    border-top-color: #602E37;
    border-top-width: 3px;
    padding: 6px 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.nav-group.active-volume .nav-link {
    font-family: 'Libre Baskerville', serif;
    text-transform: none;
    letter-spacing: 0.01em;
    font-size: 0.8rem;
}

.site-nav .nav-link {
    font-family: 'Inter', -apple-system, sans-serif;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: #4a4a4a;
    text-decoration: none;
    padding: 0.4rem 0.875rem;
    border-radius: 2px;
    border-bottom: 2px solid transparent;
    transition: color 0.15s, background 0.15s;
}

.site-nav .nav-link:hover {
    color: #DA481F;
    background: rgba(0,0,0,0.05);
}

.site-nav .nav-link.active {
    color: #602E37;
    background: transparent;
    border-bottom-color: transparent;
    font-weight: 700;
    position: relative;
}

.site-nav .nav-link.active::before {
    content: '';
    position: absolute;
    top: auto;
    bottom: -2px;
    left: 50%;
    transform: translateX(-50%);
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: #602E37;
}

.site-header-right {
    display: flex;
    align-items: center;
    gap: 1.25rem;
}

.session-info {
    font-size: 0.75rem;
    color: #767676;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    white-space: nowrap;
}

.session-info a {
    color: #4a4a4a;
    text-decoration: none;
    font-weight: 600;
}

.session-info a:hover {
    color: #DA481F;
}

.session-role {
    color: #767676;
}

.session-divider {
    color: #C7C6C1;
}

/* ── Pubcat section nav (Museum Collections | Missing Works) ─ */
.pubcat-nav {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.pubcat-nav-link {
    font-family: 'Inter', sans-serif;
    font-size: 0.8rem;
    font-weight: 500;
    color: #4a4a4a;
    text-decoration: none;
    padding: 0.35rem 0.875rem;
    border-radius: 999px;
    border: 1.5px solid transparent;
    transition: color 0.15s, border-color 0.15s, background 0.15s;
    white-space: nowrap;
}

.pubcat-nav-link:hover {
    color: #602E37;
    border-color: #602E37;
}

.pubcat-nav-link.active {
    color: #602E37;
    border-color: #602E37;
    font-weight: 600;
}

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 639px) {
    .site-header {
        min-height: 56px;
    }

    .site-header-inner {
        padding: 0.6rem 1rem;
        gap: 0.3rem 1rem;
    }

    .site-title {
        font-size: 0.8rem;
    }

    .site-header-inner {
        grid-template-columns: 1fr;
    }

    .site-header-right {
        justify-self: center;
        gap: 0.75rem;
    }

    .session-info {
        display: none;
    }

    .nav-group.active-volume {
        padding: 3px 6px;
        box-shadow: none;
    }

    .nav-group.active-volume .nav-link {
        font-size: 0.65rem;
        padding: 0.3rem 0.5rem;
    }
}