refactor taxonomy layout and improve table styling

assets/sass/_taxonomy.sass

@@ -21,11 +21,11 @@ table#taxonomy-table
     thead
         text-align: left
         border: none
-        background: $darkest
         border-radius: $border-radius $border-radius 0 0
 
     th
         color: $text
+        background: $darkest !important
         padding: 0.6rem 0.6rem
         text-align: left
         font-weight: 600
@@ -62,6 +62,12 @@ table#taxonomy-table
         &:hover, &:focus
             color: $accent-light
 
+    a
+        color: $text
+        text-decoration: none
+        &:hover, &:focus
+            color: $accent
+
 #taxonomy-page a.term-link
     padding: 0.3rem 1.2rem
     margin: 0.2rem
@@ -69,9 +75,10 @@ table#taxonomy-table
     border-radius: $border-radius
     text-decoration: none
     font-weight: 500
-    color: $text
-    transition: color 0.4s ease-in-out
     font-size: 1.2rem
+    color: $text
+    transition: color 0.4s ease-in-out, background 0.4s ease-in-out
     &:hover, &:focus
-        color: $darkest
+        color: $darkest !important
+        background: $text-subtle !important