fix: tweak mega dropdown css

Author: pfitzseb

assets/default/multidoc.css

@@ -65,14 +65,19 @@ html {
     color: #ccc;
     text-transform: uppercase;
     border: none;
+    text-align: left;
     background: none;
 }
 
+#multi-page-nav .nav-expanded .dropdown-label {
+    text-decoration: underline;
+}
+
 #multi-page-nav .dropdown-label::after {
     content: "";
     margin-left: 5px;
 
-    /* caret */
+    /* caret down */
     display: inline-block;
     vertical-align: 0.2em;
     border-top: .3em solid;
@@ -81,6 +86,12 @@ html {
     border-left: .3em solid transparent;
 }
 
+#multi-page-nav .nav-expanded .dropdown-label::after {
+    /* caret up */
+    border-top: 0;
+    border-bottom: .3em solid;
+}
+
 #multi-page-nav .dropdown-label:hover {
     color: #fff;
 }
@@ -111,12 +122,12 @@ html {
     padding: 1em 2em;
     border-radius: 0;
     border: none;
-    flex-wrap: wrap;
     margin-top: 0;
+    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
 }
 
 #multi-page-nav .nav-mega-dropdown-container .nav-mega-column {
-    margin: 0 2em;
+    margin: 1em 2em;
 }
 
 #multi-page-nav .nav-mega-dropdown-container .column-header {
@@ -125,7 +136,7 @@ html {
 }
 
 #multi-page-nav .nav-expanded .nav-mega-dropdown-container {
-    display: flex;
+    display: grid;
 }
 
 #multi-page-nav .nav-dropdown-container a.nav-link {
@@ -191,6 +202,7 @@ html {
     #multi-page-nav #nav-items {
         flex-direction: column;
         margin-top: 1.5em;
+        flex-wrap: nowrap;
     }
 
     #multi-page-nav .hidden-on-mobile {
@@ -230,7 +242,7 @@ html {
     }
 
     #multi-page-nav .nav-mega-dropdown-container .nav-mega-column {
-        margin: 0 1em;
+        margin: 1em;
     }
 
     #documenter .docs-main header.docs-navbar.headroom--unpinned.headroom--not-top.headroom--not-bottom {