support: add box for sponsors and underline Open in title

_sass/_basscss.scss

@@ -33,3 +33,4 @@
 @import "basscss/profile-picture";
 @import "basscss/commercial-link";
 @import "basscss/affiliate-disclaimer";
+@import "basscss/sponsor-box";

_sass/basscss/_sponsor-box.scss

@@ -0,0 +1,9 @@
+.sponsor-box {
+  background-color: #B3FFBB;
+  padding: 15px;
+  border: 1px solid #ddd;
+  border-radius: 5px;
+  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
+  margin-top: 10px;
+  margin-bottom: 30px;
+}

support.html

@@ -6,7 +6,7 @@
 ---
 
 <h2>
-	<center>Help me create more Open content</center>
+	<center>Help me create more <u>Open</u> content</center>
 </h2>
 
 <div class="support-buttons">
@@ -21,6 +21,14 @@ <h2>
 		<img src="/images/logos/paypal.webp" alt="PayPal" style="width: 75%; height: auto;"></a>
 </div>
 
+<div class="sponsor-box">
+  <div style="text-align: center;">
+    <span style="font-size:1.05em;">
+      🚀 Would you like to be my official sponsor? Reach out <a class="linkedin-link" href="{{ '/' | relative_url }}contact/">here</a> to chat about it!
+    </span>
+  </div>
+</div>
+
 <p><b>I want to keep my content open and up-to-date.</b> But to achieve that and keep creating new material, I
 	need your support.</p>