Add control UI

client/styles.css

@@ -0,0 +1,108 @@
+* {
+  box-sizing: border-box;
+}
+
+body {
+  font-family: "Inter", "Segoe UI", system-ui, sans-serif;
+  margin: 0;
+  background: #121212;
+  color: #f5f5f5;
+}
+
+main {
+  max-width: 960px;
+  margin: 0 auto;
+  padding: 24px;
+}
+
+header {
+  text-align: center;
+  margin-bottom: 24px;
+}
+
+header h1 {
+  margin-bottom: 8px;
+}
+
+.card {
+  background: #1f1f1f;
+  padding: 16px;
+  border-radius: 16px;
+  margin-bottom: 16px;
+  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.35);
+}
+
+label {
+  display: block;
+  margin-bottom: 12px;
+}
+
+label input,
+label textarea {
+  width: 100%;
+  border-radius: 10px;
+  border: 1px solid #333;
+  background: #0f0f0f;
+  color: #f1f1f1;
+  padding: 8px 12px;
+  margin-top: 4px;
+  font-family: inherit;
+}
+
+textarea {
+  font-family: inherit;
+}
+
+button {
+  background: linear-gradient(135deg, #6d7cff, #3b82f6);
+  border: none;
+  padding: 10px 20px;
+  color: white;
+  border-radius: 999px;
+  font-weight: 600;
+  cursor: pointer;
+  transition: transform 0.15s ease;
+}
+
+button:hover {
+  transform: translateY(-1px);
+}
+
+.button-row {
+  display: flex;
+  gap: 12px;
+  flex-wrap: wrap;
+  margin-bottom: 12px;
+}
+
+.monospace {
+  background: #0c0c0c;
+  border-radius: 12px;
+  padding: 12px;
+  border: 1px solid #333;
+  min-height: 80px;
+}
+
+.note {
+  font-size: 0.9rem;
+  margin-top: 8px;
+  color: #b0b0b0;
+}
+
+@media (min-width: 768px) {
+  label {
+    display: flex;
+    gap: 12px;
+    align-items: center;
+  }
+
+  label input,
+  label textarea {
+    width: auto;
+    flex: 1;
+  }
+
+  .stretch textarea {
+    width: 100%;
+  }
+}