Restyle links to only colour underline

assets/css/extended/overrides.css

@@ -24,21 +24,16 @@ main {
 /* box-shadow behaves weirdly in some situations, so let's use the more appropriate
  * text-underline-offset property to achieve the same look. */
 .post-content a, .post-content a > code {
-  color: color-mix(in srgb, var(--secondary) 35%, var(--content));
   box-shadow: none;
   text-decoration: underline;
+  text-decoration-color: color-mix(in srgb, var(--secondary), transparent 40%);
 }
 
 a:hover {
   color: var(--secondary);
   transition-duration: 70ms;
 }
 
-:is(.post-header, .post-content, .post-footer) a:active {
-  filter: brightness(75%);
-  transition-duration: 70ms;
-}
-
 .post-content blockquote {
   background-color: color-mix(in srgb,var(--secondary), var(--theme) 96%);
   max-width: fit-content;