Add styled button for landmark table in index.qmd

Author: JuliusWelzel

index.qmd

@@ -29,6 +29,43 @@ A **coordinate system** is fully described by:
 2. The interpretation of the three axes
 3. The units in which measurements are expressed
 
+
+<style>
+/* Style the button to appear as a box */
+.centered-button {
+  display: flex;
+  justify-content: center;
+  align-items: center;
+  height: 20vh; /* Vertically center */
+  margin: 0; /* Remove default margin */
+}
+
+.button-box {
+  background-color: #4CAF50; /* Replace with your desired color */
+  color: white;
+  padding: 15px 30px;
+  text-align: center;
+  text-decoration: none;
+  font-size: 16px;
+  font-weight: bold;
+  border-radius: 8px;
+  border: none;
+  cursor: pointer;
+  box-shadow: 0px 4px 6px rgba(0, 0, 0, 0.1);
+  transition: background-color 0.3s, transform 0.3s;
+}
+
+.button-box:hover {
+  background-color: #45a049; /* Darker green on hover */
+  transform: scale(1.05); /* Slightly enlarges on hover */
+}
+</style>
+
+<div class="centered-button">
+  <a href="subpage.html" class="button-box">Landmark table</a>
+</div>
+
+
 ### Hierarchical Structure
 
 Reference frames can have a hierarchical structure, where one frame is nested within another. For example: