feat: Underline links for accessebility, add active style for clickable elements, use current year in footer

sass/_buttons.scss

@@ -13,6 +13,7 @@
   display: inline-block;
   font-size: 0.9rem;
   padding: 0.4rem 1rem;
+  text-decoration: none;
   transition: var(--transition);
 
   &:hover {
@@ -20,6 +21,10 @@
     text-decoration: none;
   }
 
+  &:active {
+    transform: scale(var(--active));
+  }
+
   &.colored {
     color: var(--primary-color);
     background-color: transparent;