.site-header {
    position: fixed;
    inset: 0 0 auto;
    z-index: 1000;
    height: var(--header-height);
    background: linear-gradient(180deg, rgba(5, 6, 5, 0.72), transparent);
    transition:
        background-color 240ms ease,
        border-color 240ms ease,
        backdrop-filter 240ms ease;
}

.site-header.is-scrolled,
.site-header.nav-open {
    background: rgba(7, 8, 7, 0.82);
    border-bottom: 1px solid var(--color-line);
    backdrop-filter: blur(18px);
}

.site-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: min(100%, calc(var(--content-width) + (2 * var(--page-gutter))));
    height: 100%;
    margin: 0 auto;
    padding: 0 var(--page-gutter);
}

.site-logo {
    position: relative;
    z-index: 2;
    font-family: "Wuzhi Display", "Arial Black", sans-serif;
    font-size: 1.85rem;
    letter-spacing: 0.045em;
    line-height: 1;
}

.site-logo::after {
    position: absolute;
    right: -0.65rem;
    bottom: 0.08rem;
    width: 0.34rem;
    height: 0.34rem;
    content: "";
    background: var(--color-accent);
    border-radius: 50%;
}

.menu {
    display: flex;
    align-items: center;
    gap: clamp(0.2rem, 1vw, 1rem);
}

.menu-item {
    position: relative;
    margin: 0;
}

.menu-button {
    display: inline-flex;
    align-items: center;
    min-height: 2.75rem;
    padding: 0.6rem 0.75rem;
    color: rgba(242, 240, 233, 0.72);
    background: transparent;
    border: 0;
    cursor: pointer;
    font-size: 0.76rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    list-style: none;
    text-transform: uppercase;
    transition:
        color 180ms ease,
        background-color 180ms ease;
}

.menu-button::-webkit-details-marker {
    display: none;
}

.menu-button:hover,
.menu-button:focus-visible,
.menu-button[aria-current="page"],
.menu-item[open] > .menu-button {
    color: var(--color-text);
}

.menu-button[aria-current="page"]::before {
    width: 0.35rem;
    height: 0.35rem;
    margin-right: 0.55rem;
    content: "";
    background: var(--color-accent);
    border-radius: 50%;
}

.menu-more > .menu-button::after {
    width: 0.42rem;
    height: 0.42rem;
    margin: -0.2rem 0 0 0.65rem;
    content: "";
    border-right: 1px solid currentColor;
    border-bottom: 1px solid currentColor;
    transform: rotate(45deg);
    transition: transform 180ms ease;
}

.menu-more[open] > .menu-button::after {
    margin-top: 0.2rem;
    transform: rotate(225deg);
}

.dropdown {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    display: grid;
    width: max-content;
    min-width: 14rem;
    padding: 0.55rem;
    visibility: hidden;
    background: rgba(13, 15, 13, 0.96);
    border: 1px solid var(--color-line);
    border-radius: var(--radius-sm);
    box-shadow: 0 1.25rem 4rem rgba(0, 0, 0, 0.35);
    opacity: 0;
    transform: translateY(-0.35rem);
    transition:
        opacity 160ms ease,
        transform 160ms ease,
        visibility 160ms ease;
}

.dropdown a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    min-height: 2.7rem;
    padding: 0.55rem 0.8rem;
    color: var(--color-muted);
    border-radius: 0.5rem;
    font-size: 0.8rem;
    letter-spacing: 0.04em;
    transition:
        color 160ms ease,
        background-color 160ms ease;
}

.dropdown a::after {
    color: var(--color-accent);
    content: "↗";
    opacity: 0;
    transform: translate(-0.25rem, 0.25rem);
    transition:
        opacity 160ms ease,
        transform 160ms ease;
}

.dropdown a:hover,
.dropdown a:focus-visible,
.dropdown a[aria-current="page"] {
    color: var(--color-text);
    background: var(--color-surface-soft);
}

.dropdown a:hover::after,
.dropdown a:focus-visible::after,
.dropdown a[aria-current="page"]::after {
    opacity: 1;
    transform: translate(0, 0);
}

.menu-item[open] > .dropdown {
    visibility: visible;
    opacity: 1;
    transform: translateY(0);
}

.menu-toggle {
    position: relative;
    z-index: 2;
    display: none;
    width: 2.75rem;
    height: 2.75rem;
    padding: 0;
    background: transparent;
    border: 1px solid var(--color-line);
    border-radius: 50%;
    cursor: pointer;
}

.menu-toggle span,
.menu-toggle::before,
.menu-toggle::after {
    position: absolute;
    left: 50%;
    width: 1rem;
    height: 1px;
    content: "";
    background: currentColor;
    transform: translateX(-50%);
    transition:
        transform 180ms ease,
        opacity 180ms ease;
}

.menu-toggle::before {
    top: 0.95rem;
}

.menu-toggle span {
    top: 1.34rem;
}

.menu-toggle::after {
    top: 1.73rem;
}

.site-header.nav-open .menu-toggle::before {
    top: 1.34rem;
    transform: translateX(-50%) rotate(45deg);
}

.site-header.nav-open .menu-toggle span {
    opacity: 0;
}

.site-header.nav-open .menu-toggle::after {
    top: 1.34rem;
    transform: translateX(-50%) rotate(-45deg);
}

@media (hover: hover) and (min-width: 901px) {
    .menu-item:hover > .dropdown {
        visibility: visible;
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 900px) {
    .menu-toggle {
        display: block;
    }

    .menu {
        position: fixed;
        inset: var(--header-height) 0 0;
        display: flex;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        padding: 1rem var(--page-gutter) 2rem;
        visibility: hidden;
        overflow-y: auto;
        background: rgba(7, 8, 7, 0.98);
        opacity: 0;
        transform: translateY(-0.75rem);
        transition:
            opacity 200ms ease,
            transform 200ms ease,
            visibility 200ms ease;
    }

    .site-header.nav-open .menu {
        visibility: visible;
        opacity: 1;
        transform: translateY(0);
    }

    .menu-item {
        width: 100%;
        border-bottom: 1px solid var(--color-line);
    }

    .menu-button {
        justify-content: space-between;
        width: 100%;
        min-height: 3.8rem;
        padding: 0.85rem 0;
        font-size: 0.9rem;
    }

    .menu-button[aria-current="page"]::before {
        order: 2;
        margin: 0 0 0 auto;
    }

    .dropdown {
        position: static;
        width: 100%;
        min-width: 0;
        max-height: 0;
        padding: 0;
        visibility: hidden;
        overflow: hidden;
        background: transparent;
        border: 0;
        box-shadow: none;
        opacity: 1;
        transform: none;
        transition:
            max-height 240ms var(--ease-out),
            visibility 240ms ease;
    }

    .menu-item[open] > .dropdown {
        max-height: 25rem;
        padding: 0 0 0.75rem;
        visibility: visible;
    }

    .dropdown a {
        min-height: 2.8rem;
        padding: 0.55rem 1rem;
    }
}