Fixed full-screen on mobile

pico.css

         'media media'
     ;
     grid-template-columns: 1fr auto;
-    grid-template-rows: 140px auto auto;
+    grid-template-rows: 140px auto 1fr;
 
     position: fixed;
     top: 0;
     --pad: 3px;
     padding: var(--pad);
     width: calc(100vw - 2 * var(--pad));
+    height: 100%;
 }
 .online {
     grid-area: online;