/* Mobile navigation must remain collapsed until the menu button is opened. */
@media (max-width: 900px) {
    .header { position: relative; padding: 12px 16px; }
    .header .menu-toggle { display: block !important; position: absolute; z-index: 5; top: 18px; right: 12px; min-width: 48px; min-height: 48px; }
    .header #primary-navigation { display: none !important; width: auto; margin: 12px -16px -12px; padding: 14px 16px 17px; background: #fff; border-top: 1px solid #e5eaf0; }
    .header #primary-navigation.is-open { display: flex !important; flex-direction: column; align-items: stretch; gap: 3px; }
    .header #primary-navigation a, .header #primary-navigation .install-app-btn { width: 100%; box-sizing: border-box; margin: 0; padding: 12px 10px; text-align: left; }
    .header #primary-navigation .contact-btn { text-align: center; }
}