Add media to layout

pico.css

     grid-template-areas:
         'posts online'
         'actions actions'
+        'media media'
     ;
     grid-template-columns: 1fr auto;
-    grid-template-rows: 140px auto;
+    grid-template-rows: 140px auto auto;
 
     position: fixed;
     top: 0;
     display: grid;
     grid-template-columns: 1fr auto;
 }
+.media {
+    grid-area: media;
+}
 #textbox {
     resize: vertical;
 }