h2 {
  text-align: center;
  margin-bottom: 20px;
}

form {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="tel"] {
  padding: 12px;
  border: 1px solid #ccc;
  border-radius: 8px;
  font-size: 16px;
}

button,
input[type="submit"] {
  padding: 12px;
  background: #0d6efd;
  border: none;
  border-radius: 8px;
  color: white;
  font-size: 16px;
  cursor: pointer;
  transition: background 0.3s;
}

button:hover,
input[type="submit"]:hover {
  background: #0b5ed7;
}

.alert {
  padding: 12px;
  background: #f8d7da;
  border: 1px solid #f5c2c7;
  color: #842029;
  border-radius: 8px;
}

.success {
  background: #d1e7dd;
  color: #0f5132;
  border: 1px solid #badbcc;
}

.step-nav {
  display: flex;
  justify-content: space-between;
  margin-bottom: 20px;
}

.step-nav div {
  flex: 1;
  padding: 10px;
  text-align: center;
  background: #e9ecef;
  margin: 0 5px;
  border-radius: 6px;
}

.step-nav .active {
  background: #0d6efd;
  color: white;
}
 
    .invoice-box {
      background: #fff;
      max-width: 700px;
      margin: auto;
      padding: 30px;
      border: 1px solid #ddd;
      box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
      line-height: 1.6;
      font-size: 16px;
      color: #333;
    }

    .invoice-box h3 {
      text-align: center;
      border-bottom: 2px solid #007bff;
      padding-bottom: 10px;
      margin-bottom: 30px;
      color: #007bff;
    }

    .invoice-box ul {
      list-style: none;
      padding: 0;
    }

    .invoice-box li {
      margin-bottom: 12px;
      padding: 8px;
      background-color: #f1f1f1;
      border-radius: 5px;
    }

    .note {
      margin-top: 30px;
      font-style: italic;
      color: #dc3545;
    }

    .download-btn {
      display: block;
      text-align: center;
      margin-top: 30px;
    }

    .download-btn button {
      background-color: #007bff;
      color: white;
      padding: 10px 25px;
      font-size: 16px;
      border: none;
      border-radius: 6px;
      cursor: pointer;
    }

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