.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: var(--color-background);
    border-bottom: 1px solid var(--color-border);
}

.site-header__navigation {
    display: flex;
    min-height: var(--header-height);
    align-items: center;
    justify-content: space-between;
    gap: var(--space-5);
}

.site-header__logo {
    display: inline-flex;
    flex-shrink: 0;
    align-items: center;
    text-decoration: none;
}

.site-header__logo-image {
    display: block;
    width: auto;
    height: 3.6rem;
    max-width: 17rem;
    object-fit: contain;
}

.site-header__navigation-list {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    margin: 0;
    padding: 0;
    list-style: none;
}

.site-header__navigation-list a {
    display: inline-block;
    padding-block: var(--space-1);
    color: var(--color-text);
    border-bottom: 2px solid transparent;
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
    transition:
        color var(--transition-default),
        border-color var(--transition-default);
}

.site-header__navigation-list a:hover {
    color: var(--color-primary);
    border-bottom-color: var(--color-accent);
}

.site-header__navigation-list .site-header__contact-link {
    padding: 0.65rem 1rem;
    color: var(--color-surface);
    background-color: var(--color-primary);
    border: 1px solid var(--color-primary);
    border-radius: 0.25rem;
    transition:
        color var(--transition-default),
        background-color var(--transition-default),
        border-color var(--transition-default);
}

.site-header__navigation-list .site-header__contact-link:hover {
    color: var(--color-surface);
    background-color: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
}

.site-header__menu-toggle {
    position: relative;
    display: none;
    width: 2.75rem;
    height: 2.75rem;
    padding: 0;
    background-color: transparent;
    border: 1px solid var(--color-border);
    border-radius: 0.25rem;
    cursor: pointer;
}

.site-header__menu-toggle span {
    position: absolute;
    left: 50%;
    display: block;
    width: 1.25rem;
    height: 2px;
    margin: 0;
    background-color: var(--color-primary);
    transform: translate(-50%, -50%);
    transition:
        top var(--transition-default),
        transform var(--transition-default),
        opacity var(--transition-default);
}

.site-header__menu-toggle span:nth-child(1) {
    top: calc(50% - 0.4rem);
}

.site-header__menu-toggle span:nth-child(2) {
    top: 50%;
}

.site-header__menu-toggle span:nth-child(3) {
    top: calc(50% + 0.4rem);
}

.site-header__menu-toggle.is-open span:nth-child(1) {
    top: 50%;
    transform: translate(-50%, -50%) rotate(45deg);
}

.site-header__menu-toggle.is-open span:nth-child(2) {
    opacity: 0;
}

.site-header__menu-toggle.is-open span:nth-child(3) {
    top: 50%;
    transform: translate(-50%, -50%) rotate(-45deg);
}

@media (max-width: 850px) {
    .site-header__logo-image {
        height: 3rem;
        max-width: 13rem;
    }

    .site-header__navigation {
        position: relative;
    }

    .js .site-header__menu-toggle {
        display: block;
    }

    .js .site-header__navigation-list {
        position: absolute;
        top: 100%;
        right: 0;
        left: 0;
        display: none;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        padding: var(--space-3);
        background-color: var(--color-background);
        border: 1px solid var(--color-border);
        border-top: 0;
        box-shadow: 0 0.75rem 1.5rem rgb(15 39 64 / 8%);
    }

    .js .site-header__navigation-list.is-open {
        display: flex;
    }

    .site-header__navigation-list li {
        width: 100%;
    }

    .site-header__navigation-list a {
        display: block;
        width: 100%;
        padding: var(--space-2) var(--space-3);
        border-bottom: 0;
    }

    .site-header__navigation-list a:hover {
        background-color: var(--color-surface-muted);
        border-bottom-color: transparent;
    }

    .site-header__navigation-list .site-header__contact-link {
        margin-top: var(--space-2);
        text-align: center;
    }

    .no-js .site-header__navigation {
        flex-wrap: wrap;
    }

    .no-js .site-header__navigation-list {
        width: 100%;
        flex-wrap: wrap;
    }
}

@media (max-width: 600px) {
    .site-header__logo-image {
        height: 2.75rem;
        max-width: 4rem;
    }
}