[TASK] add registration box

static/serve/style.css

@@ -44,7 +44,8 @@ h2 {
 
 /** Button Styles */
 input[type="submit"], 
-button:not([class="secondary"]) {
+button:not([class="secondary"]),
+.btn {
     transition: box-shadow 0.3s ease;
 
     background: var(--pico-primary-background);
@@ -118,6 +119,14 @@ input[type="submit"]:active {
   .gap-lg {
     grid-gap: 5rem;
   }
+
+  .grid-cols-2 {
+    grid-template-columns: repeat(2, minmax(0, 1fr));
+  }
+
+  .col-span-2 {
+    grid-column: span 2 / span 2;
+  }
 }
 
 /** custom ol style */