body {
      font-family: 'Arial', sans-serif;
      background-color: #f5f5f5;
    }
    .payment-container {
      max-width: 500px;
      margin: 30px auto;
      padding: 25px;
      border-radius: 15px;
      background: white;
      box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    }
    .payment-header {
      text-align: center;
      margin-bottom: 25px;
    }
    .payment-header h3 {
      color: #333;
      margin-bottom: 10px;
    }
    .payment-option {
      margin-bottom: 25px;
      border: 1px solid #eee;
      border-radius: 10px;
      overflow: hidden;
    }
    .payment-btn {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 15px;
      width: 100%;
      border: none;
      color: white;
      font-weight: bold;
      cursor: pointer;
      transition: all 0.3s;
    }
    .yape-btn {
      background: #6a1b9a; /* Morado Yape */
    }
    .plin-btn {
      background: #00a859; /* Verde Plin */
    }
    .payment-btn:hover {
      opacity: 0.9;
    }
    .payment-content {
      padding: 0 15px;
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out;
    }
    .payment-content.active {
      padding: 15px;
      max-height: 1000px;
    }
    .qr-container {
      text-align: center;
      margin: 15px 0;
    }
    .qr-container img {
      max-width: 200px;
      border: 1px solid #ddd;
      border-radius: 8px;
    }
    .payment-info {
      margin: 15px 0;
      padding: 10px;
      background: #f9f9f9;
      border-radius: 8px;
    }
    .copy-btn {
      background: #333;
      color: white;
      border: none;
      border-radius: 4px;
      padding: 3px 8px;
      cursor: pointer;
      margin-left: 10px;
      font-size: 12px;
    }
    .form-group {
      margin-bottom: 15px;
    }
    .form-group label {
      display: block;
      margin-bottom: 5px;
      font-weight: bold;
    }
    .form-group input, .form-group textarea {
      width: 100%;
      padding: 8px;
      border: 1px solid #ddd;
      border-radius: 4px;
      box-sizing: border-box;
    }
    .submit-btn {
      background: #2c3e50;
      color: white;
      border: none;
      padding: 10px 15px;
      border-radius: 4px;
      cursor: pointer;
      width: 100%;
      font-weight: bold;
    }
    .submit-btn:hover {
      background: #1a252f;
    }
    .btn-inscribir {
      background: #4e73df;
      color: white;
      font-weight: bold;
      padding: 12px 25px;
      border-radius: 5px;
      border: none;
      margin: 20px auto;
      display: block;
      font-size: 18px;
    }

    .qr-container {
    text-align: center;
    margin: 15px 0;
  }
  .qr-container img {
    width: 180px; /* Tamaño personalizado */
    height: 180px;
    object-fit: contain;
    border: 1px solid #ddd;
    border-radius: 8px;
    background: white; /* Fondo blanco para QRs transparentes */
    padding: 10px; /* Espacio alrededor del QR */
    box-shadow: 0 2px 5px rgba(0,0,0,0.1); /* Sutil sombra */
  }
  
  @media (max-width: 576px) {
    .qr-container img {
      width: 180px;
      height: 180px;
    }
  }