body {
      background: linear-gradient(120deg, #f0f6ff, #ffffff);
      font-family: "Poppins", sans-serif;
  }

  .checkout-container {
      max-width: 1100px;
      margin: 60px auto;
      background: #fff;
      border-radius: 16px;
      padding: 40px 50px;
      box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
  }

  .checkout-header {
      text-align: center;
      font-weight: 700;
      font-size: 30px;
      color: #007bff;
      margin-bottom: 40px;
      letter-spacing: 0.5px;
  }

  .form-floating>.form-control,
  .form-floating>.form-select {
      height: calc(3.5rem + 2px);
      border-radius: 10px;
      box-shadow: none;
  }

  .form-floating label {
      color: #6c757d;
  }

  .order-summary {
      border: none;
      border-radius: 14px;
      background: #f8faff;
      padding: 25px;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
  }

  .order-summary h5 {
      font-weight: 600;
      margin-bottom: 20px;
      color: #333;
      border-bottom: 2px solid #007bff;
      padding-bottom: 8px;
  }

  .order-summary table {
      width: 100%;
  }

  .order-summary th,
  .order-summary td {
      padding: 10px 0;
      border-bottom: 1px solid #eaeaea;
      color: #444;
  }

  .place-order-btn {
      width: 100%;
      background: linear-gradient(90deg, #007bff, #0056b3);
      border: none;
      height: 48px;
      font-weight: 600;
      border-radius: 10px;
      color: #fff;
      transition: all 0.3s ease;
      letter-spacing: 0.5px;
  }

  .place-order-btn:hover {
      background: linear-gradient(90deg, #0056b3, #003d80);
      transform: translateY(-2px);
      box-shadow: 0 4px 10px rgba(0, 91, 187, 0.3);
  }

  @media (max-width: 767px) {
      .checkout-container {
          padding: 25px;
      }
  }