.portal-preview-frame,
.portal-preview-card,
.portal-config-card,
.portal-config-section { contain: layout paint; }

.portal-config-card:focus-visible { transform: translateY(-2px); }

.portal-preview-card label,
.portal-preview-card input,
.portal-preview-card button { font-size: max(.95rem, 16px); }