.site-header {

    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(5, 5, 5, 0.60);
    border-bottom: 1px solid var(--color-border);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(30px);
}

.header-container {

    width: min(100% - 2 * var(--container-padding), var(--container-width-wide));
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    height: var(--header-height);
    column-gap: 32px;
}

.brand {

    justify-self: start;
    display: inline-flex;
    align-items: center;
    gap: 0;
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 800;
    letter-spacing: -0.045em;
    text-decoration: none;

    transition:
        transform var(--transition-fast),
        opacity var(--transition-fast);
}

.brand:hover {
    transform: translateY(-1px);
}

.brand-mark {
    color: var(--color-brand-red);
}

.brand-name {
    color: var(--color-gold-light);
}

.brand .brand-mark {
    font-size: 1.20em;
}

.main-navigation {
    justify-self: center;
}

.navigation-list {

    display: flex;
    align-items: center;
    gap: 40px;
}

.navigation-link {

    position: relative;
    display: inline-block;
    padding-block: 12px;
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    font-weight: 600;
    transition: color var(--transition-fast);
}

.navigation-link::after {

    content: "";
    position: absolute;
    left: 0;
    bottom: 4px;
    width: 100%;
    height: 2px;

    background: linear-gradient(90deg,
            var(--color-gold-dark),
            var(--color-gold-light));

    transform: scaleX(0);
    transform-origin: right;
    transition: transform var(--transition-normal);
}

.navigation-link:hover,
.navigation-link.active,
.navigation-link.is-active {

    color: var(--color-text-primary);
}

.navigation-link:hover::after,
.navigation-link.active::after,
.navigation-link.is-active::after {

    transform: scaleX(1);
    transform-origin: left;
}

.header-actions {

    justify-self: end;
    display: flex;
    align-items: center;
    gap: 22px;
}

.header-link {

    color: var(--color-text-secondary);
    font-size: 0.95rem;
    font-weight: 600;
    transition: color var(--transition-fast);
}

.header-link:hover {
    color: var(--color-gold-light);
}

/* Mobile Navigation */

.mobile-menu-button {

    display: none;
    justify-self: end;
    grid-column: 3;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 44px;
    height: 44px;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-small);
    color: var(--color-text-primary);
    background: var(--color-surface);
    cursor: pointer;
    transition:
        border-color var(--transition-fast),
        background var(--transition-fast);
}

.mobile-menu-button:hover {
    border-color: var(--color-border-strong);
    background: rgba(214, 180, 106, 0.08);
}

.mobile-menu-button span {

    display: block;
    width: 20px;
    height: 2px;
    margin-inline: auto;
    background: currentColor;
    border-radius: 999px;
    transition:
        transform var(--transition-normal),
        opacity var(--transition-fast);
}

.mobile-menu-button[aria-expanded="true"] span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.mobile-menu-button[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-button[aria-expanded="true"] span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

.mobile-navigation {

    display: none;
    padding: 8px var(--container-padding) 28px;
    border-top: 1px solid var(--color-border);
    background: rgba(7, 7, 7, 0.96);
}

.mobile-navigation.is-open {
    display: block;
}

.mobile-navigation-list {
    display: grid;
    gap: 4px;
}

.mobile-navigation-link {

    display: block;
    padding: 14px 4px;
    color: var(--color-text-secondary);
    border-bottom: 1px solid rgba(214, 180, 106, 0.10);
    font-size: 1.05rem;
    font-weight: 600;
    transition: color var(--transition-fast);
}

.mobile-navigation-link:hover,
.mobile-navigation-link:focus-visible,
.mobile-navigation-link.active,
.mobile-navigation-link.is-active {
    color: var(--color-gold-light);
}

.mobile-navigation-actions {

    display: grid;
    gap: 16px;
    margin-top: 24px;
}

.mobile-navigation-actions .button {
    width: 100%;
}

body.nav-open {
    overflow: hidden;
}

@media (max-width: 1120px) {

    .main-navigation,
    .header-actions {
        display: none;
    }

    .mobile-menu-button {
        display: flex;
    }
}

@media (max-width: 600px) {

    .brand {
        font-size: 1.35rem;
    }
}