fixed some styling issues that prevented the enter email for login field from displaying on landscape breakpoints

src/static_src/scss/_base.scss

@@ -243,8 +243,27 @@ body {
             // margin-left: 0.75rem;
         }
 
-        // Login form: email input can't fit in narrow sidebar
-        .input-group { display: none; }
+        // Login form: pull out of narrow sidebar, centre in the viewport content area
+        .input-group {
+            display: flex;
+            position: fixed;
+            left: $sidebar-w;
+            right: $sidebar-w;
+            top: 50%;
+            transform: translateY(-50%);
+            flex-direction: column;
+            align-items: center;
+            z-index: 50;
+
+            .navbar-text {
+                writing-mode: horizontal-tb;
+                transform: none;
+                font-size: 0.75rem;
+                white-space: normal;
+                margin: 0 0 0.25rem;
+                text-align: center;
+            }
+        }
     }
 
     // Container: fill centre, compensate for fixed sidebars on both sides