Update style.css

style.css

@@ -21,6 +21,21 @@ h1 {
   animation: pulse 2s infinite;
 }
 
+#starfield {
+  position: fixed;
+  top: 0;
+  left: 0;
+  z-index: 0;
+  background: black;
+}
+
+.container {
+  position: relative;
+  z-index: 1;
+  max-width: 600px;
+}
+
+
 #countdown {
   display: flex;
   justify-content: center;