body {
        background-image: url('../imagenes/carrera/fondo_pago.jpg');
        background-size: cover;
        background-position: center;
        background-repeat: no-repeat;
        background-attachment: fixed;
        font-family: Arial, sans-serif;
        margin: 0;
        padding: 20px;
        min-height: 100vh;
        display: flex;
        justify-content: center;
        align-items: center;
      }
      
      section {
        background-color: rgba(18, 18, 18, 0.92);
        border-radius: 15px;
        padding: 10px;
        max-width: 750px;
        width: 90%;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
      }
      
      .header-logos {
        display: flex;
        justify-content: space-between;
        align-items: center;
     
        border-bottom: 2px solid #eee;
      }
      
      .carrera-logo {
        height: 90px;
        width: auto;
      }
      
      .competencia-logo {
        height: 200px;
        width: auto;
      }
      
      .instructions-container {
        background-color: #f8f9fa;
        border-left: 5px solid #3498db;
        padding: 10px;
        margin: 25px 0;
        border-radius: 8px;
      }
      
      .instructions-container h2 {
        color: #2c3e50;
        margin-top: 0;
        margin-bottom: 15px;
        font-size: 1.5em;
      }
      
      .instructions-list {
        padding-left: 20px;
      }
      
      .instructions-list li {
        margin-bottom: 12px;
        line-height: 1.5;
        color: #34495e;
      }
      
      .step-number {
        display: inline-block;
        background-color: #3498db;
        color: white;
        width: 25px;
        height: 25px;
        border-radius: 50%;
        text-align: center;
        line-height: 25px;
        margin-right: 10px;
        font-weight: bold;
      }
      
      .product {
        display: flex;
        align-items: center;
        gap: 25px;
        margin-bottom: 25px;
        padding: 20px;
        background-color: white;
        border-radius: 10px;
        box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
      }
      
      .product img {
        width: 150px;
        height: auto;
        border-radius: 10px;
        object-fit: cover;
      }
      
      .description {
        flex-grow: 1;
      }
      
      .description h3 {
        margin-top: 0;
        color: #2c3e50;
        font-size: 1.8em;
      }
      
      .description h5 {
        color: #27ae60;
        font-size: 1.8em;
        margin: 10px 0;
      }
      
      form {
        text-align: center;
        margin-top: 30px;
      }
      
      #checkout-button {
        background-color: #3498db;
        color: white;
        border: none;
        padding: 16px 40px;
        font-size: 1.2em;
        border-radius: 50px;
        cursor: pointer;
        transition: all 0.3s ease;
        font-weight: bold;
        letter-spacing: 0.5px;
        box-shadow: 0 5px 15px rgba(52, 152, 219, 0.3);
      }
      
      #checkout-button:hover {
        background-color: #2980b9;
        transform: translateY(-3px);
        box-shadow: 0 8px 20px rgba(52, 152, 219, 0.4);
      }
      
      .note {
        text-align: center;
        margin-top: 15px;
        font-style: italic;
        color: #7f8c8d;
        font-size: 0.9em;
      }