.site-header {
    position: sticky;
    z-index: 50;
    top: 0;
    border-bottom: 1px solid rgba(229, 220, 229, 0.8);
    background: rgba(252, 250, 248, 0.94);
    backdrop-filter: blur(14px);
}

.site-header__inner {
    display: flex;
    min-height: 5.25rem;
    align-items: center;
    justify-content: space-between;
    gap: var(--abk-space-6);
}

.site-header__brand,
.site-footer__brand {
    display: inline-flex;
    align-items: center;
    gap: var(--abk-space-3);
    color: var(--abk-color-plum);
    font-weight: 800;
    letter-spacing: -0.03em;
    text-decoration: none;
}

.site-header__brand-logo,
.site-footer__brand-logo {
    display: block;
    flex: 0 0 auto;
    width: 13.5rem;
    height: auto;
    object-fit: contain;
}

.site-header__menu {
    display: flex;
    align-items: center;
    gap: clamp(0.8rem, 1.7vw, 1.7rem);
    padding: 0;
    margin: 0;
    list-style: none;
}

.site-header__menu a {
    color: var(--abk-color-muted);
    font-size: var(--abk-text-sm);
    font-weight: 650;
    text-decoration: none;
    transition: color var(--abk-transition);
}

.site-header__menu a:hover,
.site-header__menu .current-menu-item > a { color: var(--abk-color-jade); }

.site-header__toggle {
    display: none;
    width: 2.75rem;
    min-height: 2.75rem;
    padding: 0.65rem;
    border: 1px solid var(--abk-color-border);
    border-radius: var(--abk-radius-sm);
    background: var(--abk-color-white);
    color: var(--abk-color-plum);
}

.site-header__toggle > span[aria-hidden="true"] {
    display: block;
    width: 100%;
    height: 2px;
    margin-block: 4px;
    border-radius: 2px;
    background: currentColor;
}

.site-footer {
    margin-top: var(--abk-space-section);
    background: var(--abk-color-plum-dark);
    color: rgba(255, 255, 255, 0.78);
}

.site-footer__inner {
    display: grid;
    grid-template-columns: minmax(15rem, 1.4fr) repeat(3, minmax(9rem, 1fr));
    gap: var(--abk-space-10);
    padding-block: clamp(3.5rem, 7vw, 6rem);
}

.site-footer__brand {
    width: max-content;
    max-width: 100%;
    padding: 0.7rem 0.9rem;
    border-radius: var(--abk-radius-sm);
    background: var(--abk-color-paper);
    box-shadow: var(--abk-shadow-sm);
}
.site-footer__brand-logo { width: 13.5rem; max-width: 100%; }
.site-footer h2 { margin: 0 0 var(--abk-space-4); color: var(--abk-color-white); font-size: var(--abk-text-sm); }
.site-footer__intro h2 { margin-top: var(--abk-space-5); font-family: var(--abk-font-display); font-size: var(--abk-text-xl); line-height: 1.25; }
.site-footer p { margin: 0; font-size: var(--abk-text-sm); }
.site-footer ul { padding: 0; margin: 0; list-style: none; }
.site-footer li + li { margin-top: var(--abk-space-3); }
.site-footer li a,
.text-link { color: rgba(255, 255, 255, 0.78); font-size: var(--abk-text-sm); text-decoration: none; }
.site-footer li a:hover,
.text-link:hover { color: var(--abk-color-champagne); }
.site-footer__contact .text-link { display: inline-flex; margin-top: var(--abk-space-5); color: var(--abk-color-champagne); font-weight: 700; }

.site-footer__bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--abk-space-4);
    padding-block: var(--abk-space-6);
    border-top: 1px solid rgba(255, 255, 255, 0.14);
}

.site-footer__bottom small { font-size: var(--abk-text-xs); }
.site-footer__back-to-top { color: var(--abk-color-champagne); font-size: var(--abk-text-sm); font-weight: 700; text-decoration: none; white-space: nowrap; }

@media (max-width: 1023px) {
    .site-header__toggle { display: block; }
    .site-header__navigation {
        position: absolute;
        inset: calc(100% + 1px) 0 auto;
        display: none;
        border-bottom: 1px solid var(--abk-color-border);
        background: var(--abk-color-paper);
        box-shadow: var(--abk-shadow-md);
    }
    .site-header__navigation.is-open { display: block; }
    .site-header__menu { display: grid; gap: 0; width: min(100% - (var(--abk-page-gutter) * 2), var(--abk-container-max)); margin: 0 auto; padding-block: var(--abk-space-3); }
    .site-header__menu a { display: block; padding-block: var(--abk-space-3); }
    .site-footer__inner { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .site-footer__intro { grid-column: 1 / -1; max-width: 35rem; }
}

@media (max-width: 767px) {
    .site-header__inner { min-height: 4.6rem; }
    .site-header__brand-logo { width: 10.5rem; }
    .site-footer__brand-logo { width: 12rem; }
    .site-footer__inner { grid-template-columns: 1fr; gap: var(--abk-space-8); }
    .site-footer__bottom { align-items: flex-start; flex-direction: column; }
}