h1, h1.page-title{font-size:2rem;}
.catalog-product-view .product h1.page-title{
    font-size: 20px;
 }
.navigation, .breadcrumbs, .page-header .header.panel, .header.content, .footer.content, .page-wrapper > .widget, .page-wrapper > .page-bottom, .block.category.event, .top-container, .page-main, .page-header .header.content {
    max-width: none;
}