Napassung von home.php und der main.css fuer responsive design

content/home.php

@@ -13,22 +13,28 @@
         sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no
         sea takimata sanctus est Lorem ipsum dolor sit amet.
     </p>
-    <div>
+
-    <a href = "content/informatik.php" style = "padding: 5px; text-align: center; text-decoration: none; display: inline-block;"><b>Informatik</b></a> <br>
+    <!-- Flexbox -->
-    <div>
+     <div class="flexbox">
+        <div class="container">
+            <a href="content/informatik.php" class="category-link">Informatik</a>
+            <div class="article-link">
                 <a href="articles/datenschutz.php">Datenschutz vs. Datensicherheit</a>
             </div>
         </div>
-    <div>
+
-    <a href = "content/mathe.php" style = "padding: 5px; text-align: center; text-decoration: none; display: inline-block;"><b>Mathe</b></a> <br>
+        <div class="container">
-    <div>
+            <a href="content/mathe.php" class="category-link">Mathe</a>
+            <div class="article-link">
                 <a href="articles/pythagoras.php">Satz des Pythagoras</a>
             </div>
         </div>
-    <div>
+        
-    <a href = "content/physik.php" style = "padding: 5px; text-align: center; text-decoration: none; display: inline-block;"><b>Physik</b></a>
+        <div class="container">
-    <div>
+            <a href="content/physik.php" class="category-link">Physik</a>
+            <div class="aritcles-link">
                 <a href="articles/tunneleffekt.php">Der Tunneleffekt</a>
             </div>
         </div>
+    </div>
 </main>

css/main.css

@@ -1,3 +1,50 @@
+/** Standard Layout */
+main {
+  max-width:1200px;
+  margin: 0 auto;
+  padding: 20px;
+  font-family: Arial;
+}
+
+.flexbox {
+  display: flex;
+  flex-direction: column;
+  gap: 20px;
+  margin-top: 30px;
+}
+
+.container {
+  border: 1px solid #ddd;
+  padding: 15px;
+  border-radius: 8px;
+  background-color: #f9f9f9;
+  transition: transform 0.2s;
+}
+
+.category-link {
+  display: block;
+  text-align: center;
+  text-decoration: none;
+  font-weight: none;
+  padding: 10px;
+  background-color: #007bff;
+  color: white;
+  border-radius: 4px;
+  margin-bottom: 10px;
+}
+
+.article-link a {
+  color: orange;
+  text-decoration: none;
+}
+
+/** Anpassung fuer grosse Monitore */
+@media (min-width: 1024px) {
+  .container {
+    padding 25px
+  }
+}
+
 body {
   background-color: coral;
 }