.pagenav { display:grid; grid-template-columns:minmax(0,1fr) minmax(0,1fr); align-items:start; gap:12px; }
.pagenav .nav-back { grid-column:1; justify-self:start; }
.pagenav .nav-next { grid-column:2; grid-row:1; justify-self:end; }
.pagenav .nav-contents { grid-column:1; grid-row:2; justify-self:start; }
.pagenav .button { width:auto; max-width:100%; text-align:center; }

.guide-page .topbar { font-size:16px; line-height:1.6; position:sticky; top:0; }
.guide-page .header-menu .nav-group h2 { font-size:.78rem; line-height:1.6; margin:0 0 5px; }
.guide-page .header-menu > summary { font-size:16px; }
@media print { .guide-page .topbar { display:none; } }