.success-page {
  max-width: 600px;
  margin: 60px auto;
  background: #fff;
  padding: 40px 30px;
  border-radius: 14px;
  text-align: center;
  box-shadow: 0 4px 14px rgba(0,0,0,0.1);
}
.success-page h1 {
  color: #2e7d32;
  margin-bottom: 20px;
}
.success-page p {
  color: #333;
  margin-bottom: 10px;
}
.button-primary {
  background-color: #5c6bc0;
  color: white;
  padding: 10px 20px;
  border: none;
  border-radius: 8px;
  text-decoration: none;
  font-weight: bold;
  display: inline-block;
  margin-top: 20px;
  transition: background 0.2s;
}
.button-primary:hover {
  background-color: #3f51b5;
}