Match codeblock footer height with tabs

Author: satya164

src/css/custom.css

@@ -1000,30 +1000,29 @@ samp {
 }
 
 .code-block-footer {
-  height: 2.5em;
-  padding: 0 var(--ifm-pre-padding);
-  margin-bottom: 25px;
-  margin-top: -8px;
+  height: 2.625rem;
   justify-content: space-between;
 }
 
-.code-block-expand {
-  appearance: none;
-  border: none;
-  background: none;
-  font-size: inherit;
-  cursor: pointer;
-}
-
 .code-block-expand,
 .code-block-snack-link {
   display: flex;
   align-items: center;
-  padding: 0;
   margin: 0;
+  padding: 0 var(--ifm-pre-padding);
   height: 100%;
 }
 
+.code-block-expand {
+  appearance: none;
+  border: none;
+  background: none;
+  font-size: inherit;
+  cursor: pointer;
+  margin-left: -4px;
+  opacity: 0.7;
+}
+
 .code-block-snack-link {
   margin-left: auto;