reformatted index.css for consistent indentation and structure, improving readability and maintainability of styles

Signed-off-by: Matthias Puchstein <matthias@puchstein.bayern>

src/index.css

@@ -87,6 +87,7 @@ a {
     color: var(--accent);
     text-decoration: inherit;
 }
+
 a:hover {
     color: var(--text-muted);
 }
@@ -120,9 +121,11 @@ button {
     cursor: pointer;
     transition: border-color 0.25s, background-color 0.3s, color 0.3s;
 }
+
 button:hover {
     border-color: var(--accent);
 }
+
 button:focus,
 button:focus-visible {
     outline: 4px auto -webkit-focus-ring-color;
@@ -239,7 +242,6 @@ button:focus-visible {
     -webkit-background-clip: text;
     -webkit-text-fill-color: transparent;
     margin-bottom: 0.5rem;
-  text-shadow: 0 1px 2px var(--text-shadow);
     text-rendering: geometricPrecision;
     -webkit-font-smoothing: antialiased;
     -moz-osx-font-smoothing: grayscale;
@@ -318,9 +320,11 @@ button:focus-visible {
     h1 {
         font-size: 2.5em;
     }
+
     h2 {
         font-size: 1.8em;
     }
+
     p {
         font-size: 0.95em;
     }