.site-header {
    position: sticky;
    top: 0;
    z-index: 30;
    display: grid;
    min-height: var(--header-height);
    grid-template-columns: minmax(170px, 1fr) auto minmax(170px, 1fr);
    align-items: center;
    gap: 1rem;
    padding: 0.75rem clamp(1rem, 3vw, 2.5rem);
    border-bottom: 1px solid var(--color-border);
    background:
        linear-gradient(90deg, rgba(0, 214, 255, 0.08), transparent 24%, transparent 76%, rgba(77, 226, 125, 0.07)),
        rgba(2, 7, 11, 0.88);
    backdrop-filter: blur(14px);
}

.site-header__user,
.site-header__auth {
    display: flex;
    align-items: center;
}

.site-header__user {
    min-width: 0;
    gap: 0.45rem;
    color: var(--color-muted);
}

.site-header__label {
    color: var(--color-soft);
    font-size: 0.78rem;
    text-transform: uppercase;
}

.site-header__value {
    overflow: hidden;
    max-width: 16rem;
    color: var(--color-text);
    font-weight: 700;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.site-header__center {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.8rem;
}

.site-header__home {
    display: inline-flex;
    min-height: 42px;
    align-items: center;
    justify-content: center;
    padding: 0 1rem;
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius-sm);
    background: rgba(0, 214, 255, 0.08);
    box-shadow: var(--shadow-cyan);
    color: var(--color-text);
    font-weight: 800;
    text-decoration: none;
}

.site-header__auth {
    justify-content: flex-end;
}

@media (max-width: 840px) {
    .site-header {
        grid-template-columns: 1fr;
        justify-items: stretch;
    }

    .site-header__center {
        order: -1;
        justify-content: space-between;
    }

    .site-header__auth {
        justify-content: flex-start;
    }
}