body {
  background-color: #f0f8ff;
  font-family: Arial, sans-serif;
  text-align: center;
}

h1 {
  color: #00796b;
  font-size: 2.5rem;
  margin-bottom: 20px;
}

form {
  display: inline-block;
  padding: 20px;
  border-radius: 10px;
  background-color: #ffffff;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

input[type="email"] {
  padding: 10px;
  width: 250px;
  border: 1px solid #ccc;
  border-radius: 5px;
}

button {
  padding: 10px 20px;
  background-color: #28a745;
  color: white;
  border: none;
  border-radius: 5px;
  margin-left: 10px;
  cursor: pointer;
}

.alert {
  margin: 15px auto;
  width: fit-content;
  padding: 10px 20px;
  border-radius: 5px;
  font-weight: bold;
  font-size: 16px;
}

.alert-success {
  background-color: #d4edda;
  color: #155724;
  border: 1px solid #c3e6cb;
}