body {
  background-color: #f8f9fa;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
  margin: 0;
}
.register-container {
  max-width: 400px;
  width: 100%;
  padding: 20px;
  background-color: #fff;
  border-radius: 5px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}
.register-container .btn-primary {
  width: 100%;
}