[Glitch] Add logged-out access to the web UI

Port part of 43b5d5e38d to glitch-soc

Signed-off-by: Claire <claire.github-309c@sitedethib.com>

app/javascript/flavours/glitch/styles/components/single_column.scss

@@ -6,6 +6,26 @@
   height: calc(100% - 10px);
   overflow-y: hidden;
 
+  .hero-widget {
+    box-shadow: none;
+
+    &__text,
+    &__img,
+    &__img img {
+      border-radius: 0;
+    }
+
+    &__text {
+      padding: 15px;
+      color: $secondary-text-color;
+
+      strong {
+        font-weight: 700;
+        color: $primary-text-color;
+      }
+    }
+  }
+
   .search__input {
     line-height: 18px;
     font-size: 16px;
@@ -21,10 +41,6 @@
     flex: 0 1 48px;
   }
 
-  .flex-spacer {
-    background: transparent;
-  }
-
   .composer {
     flex: 1;
     overflow-y: hidden;
@@ -61,6 +77,14 @@
     flex: 0 0 auto;
   }
 
+  .logo {
+    height: 30px;
+    width: auto;
+  }
+}
+
+.navigation-panel,
+.compose-panel {
   hr {
     flex: 0 0 auto;
     border: 0;