.portal-back{display:grid;place-items:center;flex-shrink:0;width:44px;height:44px;color:#a6dcff;text-decoration:none;border:1px solid rgba(255,255,255,.17);border-radius:12px;font:22px system-ui}
.portal-back:hover{background:rgba(83,185,255,.15)}
.portal-back:focus-visible{outline:3px solid #53b9ff;outline-offset:3px}
@media(max-width:380px){.brand{gap:.5rem}.brand-mark{display:none}}