Update style.css

style.css

@@ -1,28 +1,71 @@
+* {
+  margin: 0;
+  padding: 0;
+  box-sizing: border-box;
+}
+
 body {
-	padding: 2rem;
-	font-family: -apple-system, BlinkMacSystemFont, "Arial", sans-serif;
+  background: radial-gradient(circle at center, #020617, #000);
+  color: #e5e7eb;
+  font-family: system-ui, sans-serif;
+  overflow: hidden;
+}
+
+canvas {
+  position: fixed;
+  inset: 0;
+}
+
+.panel {
+  position: absolute;
+  top: 2rem;
+  left: 2rem;
+  width: 240px;
+  background: linear-gradient(
+    135deg,
+    rgba(255, 255, 255, 0.06),
+    rgba(255, 255, 255, 0.02)
+  );
+  backdrop-filter: blur(14px);
+  padding: 1.4rem;
+  border-radius: 18px;
+  box-shadow:
+    0 0 40px rgba(255, 255, 255, 0.15),
+    inset 0 0 20px rgba(255, 255, 255, 0.05);
 }
 
 h1 {
-	font-size: 16px;
-	margin-top: 0;
+  font-size: 1.4rem;
 }
 
 p {
-	color: rgb(107, 114, 128);
-	font-size: 15px;
-	margin-bottom: 10px;
-	margin-top: 5px;
+  font-size: 0.8rem;
+  opacity: 0.7;
+  margin-bottom: 1rem;
+}
+
+label {
+  display: block;
+  font-size: 0.75rem;
+  margin-bottom: 0.7rem;
+}
+
+input[type="range"] {
+  width: 100%;
+  margin-top: 0.3rem;
 }
 
-.card {
-	max-width: 620px;
-	margin: 0 auto;
-	padding: 16px;
-	border: 1px solid lightgray;
-	border-radius: 16px;
+button {
+  width: 100%;
+  margin-top: 0.6rem;
+  padding: 0.6rem;
+  background: rgba(0, 0, 0, 0.6);
+  color: #fff;
+  border: 1px solid rgba(255, 255, 255, 0.15);
+  border-radius: 10px;
+  cursor: pointer;
 }
 
-.card p:last-child {
-	margin-bottom: 0;
+button:hover {
+  background: rgba(255, 255, 255, 0.08);
 }