.paymentForm {
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  width: 100%;
  margin-top: 15px;
  margin-bottom: 25px;
}
.payment-box {
  background: #fff;
  padding: 35px;
  border-radius: 18px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.05);
  font-family: "Segoe UI", sans-serif;
}

.payment-box h3 {
  font-weight: 700;
  color: #212529;
}

.payment-box .form-group label {
  font-weight: 600;
  margin-bottom: 5px;
  font-size: 14px;
  color: #333;
}

.payment-box .form-control {
  border-radius: 10px;
  padding: 12px 14px;
  font-size: 16px;
  border: 1px solid #ddd;
  transition: border-color 0.2s ease;
}

.payment-box .form-control:focus {
  border-color: #3b82f6;
  outline: none;
  box-shadow: 0 0 0 0.1rem rgba(59, 130, 246, 0.25);
}

.pay-btn {
  background-color: #2563eb;
  color: white;
  padding: 12px;
  font-size: 16px;
  border-radius: 10px;
  font-weight: 600;
  margin-top: 10px;
  transition: all 0.3s ease;
}

.pay-btn:hover {
  background-color: #1d4ed8;
  box-shadow: 0 4px 10px rgba(37, 99, 235, 0.25);
}