.main-header {
    background-color: var(--color-white);
    border-bottom: 0.0625rem solid var(--color-border);
    box-shadow: 0 0.125rem 0.5rem rgba(0, 0, 0, 0.05);
}

.header-container {
    max-width: 75rem;
    margin: 0 auto;
    padding: var(--space-md) var(--space-lg);
}

.logo-brand {
    height: 3.125rem; /* ~50px, scala perfettamente */
    width: auto;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--space-lg);
}

.nav-link-custom {
    font-size: 0.9375rem; /* ~15px */
    font-weight: 600;
    color: var(--color-dark);
    padding: var(--space-sm) 0;
    border-bottom: 0.125rem solid transparent;
}

.nav-link-custom:hover,
.nav-link-custom.active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
}