<header> <nav class="navbar navbar-dark bg-primary"> <a href="#" class="navbar-brand lht-0"> <i class="fas fa-chevron-left fs-12 p-1"></i> <span class="d-none d-md-inline fs-10"> 戻る </span> </a> <div class="navbar-nav"> <div class="nav-item"> <div class="text-size btn-group btn-group-sm" role="group"> <button type="button" class="btn btn-white btn-sm border size-button smaller"><i class="fas fa-minus"></i></button> <button type="button" class="btn btn-white btn-sm border size-button defaulter"><i class="fas fa-font"></i></button> <button type="button" class="btn btn-white btn-sm border size-button larger"><i class="fas fa-plus"></i></button> </div> </div> </div> </nav> </header>