body {
  background-color: #f8f9fa;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

#bank-details {
  padding-top: 50px;
}

.heading-3 {
  font-weight: bold;
  margin-bottom: 30px;
  color: #333;
}

form {
  max-width: 500px;
  margin: auto;
  background: #ffffff;
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 0 15px rgba(0, 0, 0, 0.05);
}

form label {
  margin-top: 15px;
  font-weight: 500;
  color: #555;
}

.form-control {
  margin-top: 5px;
  margin-bottom: 10px;
  border-radius: 6px;
  border: 1px solid #ced4da;
  font-size: 15px;
}

.button-wrapper {
  margin-top: 30px;
  display: flex;
  justify-content: center;
}

button.btn-primary {
  padding: 10px 30px;
  font-size: 16px;
  border-radius: 6px;
  background-color: #007bff;
  border: none;
  transition: background-color 0.3s ease;
}

button.btn-primary:hover {
  background-color: #0056b3;
}

/* Responsive tweaks */
@media (max-width: 576px) {
  form {
    padding: 20px;
  }

  .heading-3 {
    font-size: 22px;
  }

  button.btn-primary {
    width: 100%;
  }
}