.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    padding-block: 12px;
    background: var(--color-background);
}

.site-header__bar {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    height: 72px;
    padding-inline: 24px;
    background: var(--color-surface-container-lowest);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-card);
}

.site-header__brand {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.site-header__logo {
    width: 52px;
    height: 58px;
}

.site-header__title {
    font-size: var(--text-headline-md-size);
    line-height: var(--text-headline-md-line);
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: -0.01em;
    white-space: nowrap;
    transform: translateY(3px);
}

.site-header__nav {
    display: none;
    align-items: center;
    justify-content: center;
    gap: 24px;
    flex: 1;
    min-width: 0;
}

.site-header__link {
    font-size: var(--text-body-md-size);
    color: var(--color-secondary);
    padding-bottom: 4px;
    border-bottom: 2px solid transparent;
    transition: color 0.2s ease, border-color 0.2s ease;
}

.site-header__link:hover {
    color: var(--color-primary);
}

.site-header__link--active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
}

.site-header__actions {
    display: flex;
    align-items: center;
    gap: 12px;
    flex: 1;
    min-width: 0;
    justify-content: flex-end;
}

.site-header__search {
    position: relative;
    width: 100%;
    min-width: 0;
    max-width: 256px;
    display: block;
    flex: 1;
}

.site-header__search-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-outline);
    pointer-events: none;
}

.site-header__search-input {
    width: 100%;
    border: none;
    border-radius: var(--radius-xl);
    background: var(--color-surface-container-low);
    padding: 10px 12px 10px 40px;
    outline: none;
    transition: box-shadow 0.2s ease;
}

.site-header__search-input:focus {
    box-shadow: 0 0 0 2px var(--color-primary);
}

.site-header__menu-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    flex: 0 0 40px;
    background: none;
    border: none;
    padding: 8px;
    color: var(--color-on-surface-variant);
    cursor: pointer;
    border-radius: var(--radius-full);
}

.site-header__menu-toggle:hover {
    background: var(--color-surface-container-low);
}

.site-header__mobile-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: 10;
    display: flex;
    flex-direction: column;
    gap: 4px;
    margin-top: 8px;
    padding: 16px;
    background: var(--color-surface-container-lowest);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-card);
}

.site-header__mobile-nav[hidden] {
    display: none;
}

.site-header__mobile-link {
    padding: 8px 0;
    color: var(--color-on-surface);
    font-size: var(--text-body-md-size);
}

@media (max-width: 479px) {
    .site-header__bar {
        gap: 10px;
        padding-inline: 16px;
    }

    .site-header__brand {
        gap: 6px;
    }

    .site-header__logo {
        width: 44px;
        height: 49px;
    }

    .site-header__title {
        font-size: 22px;
        line-height: 28px;
    }

    .site-header__search-icon {
        left: 10px;
        font-size: 22px;
    }

    .site-header__search-input {
        padding-inline: 36px 10px;
        font-size: var(--text-body-sm-size);
    }
}

@media (min-width: 1200px) {
    .site-header__bar {
        gap: 24px;
    }

    .site-header__nav {
        display: flex;
    }

    .site-header__actions {
        gap: 16px;
        flex: 0 0 auto;
    }

    .site-header__menu-toggle {
        display: none;
    }
}