body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #f5f7fb;
  color: #222;
}

.container {
  max-width: 800px;
  margin: 80px auto;
  padding: 40px;
  background: white;
  border-radius: 16px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
  text-align: center;
}

h1 {
  color: #0f766e;
}

button {
  padding: 12px 20px;
  background: #0f766e;
  color: white;
  border: none;
  border-radius: 8px;
  cursor: pointer;
}

button:hover {
  background: #115e59;
}