body {
  font-family: -apple-system, BlinkMacSystemFont, sans-serif;
  background: #0f172a;
  color: white;
  margin: 0;
  padding: 20px;
}

.container {
  max-width: 700px;
  margin: auto;
}

h1 {
  text-align: center;
  margin-bottom: 30px;
}

.section {
  background: #1e293b;
  padding: 20px;
  margin-bottom: 20px;
  border-radius: 14px;
}

.section h2 {
  margin-top: 0;
}

button {
  display: block;
  width: 100%;
  margin-bottom: 10px;
  padding: 12px;
  border: none;
  border-radius: 10px;
  background: #22c55e;
  color: white;
  font-weight: bold;
  cursor: pointer;
}

button:hover {
  opacity: 0.85;
}