cuerpo3 {
    background: #f3f4f6;
    font-family: Helvetica Neue, Helvetica, Arial, sans-serif;
    font-size: 14px;
    color: #000;
    margin: 0;
    padding: 0;
}

.swiper-container {
    width: 80%;
    padding-top: 50px;
    padding-bottom: 50px;
}

.swiper-slide {
    background-position: center;
    background-size: cover;
    width: 300px;
    height: 300px;
}

header4{
    background: #3e9af5;
    width: 100%;
    height: 60px;
    position: relative;
}

header i{
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #f3f4f6;
    font-size: 20px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  cuerpo4 {
    font-family: Arial, sans-serif;
    background-color: #f3f3f3;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
  }
  
  .grid-container {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    width: 100%;
    max-width: 800px;
  }
  
  @media (max-width: 768px) {
    .grid-container {
      display: grid;
      grid-template-columns: repeat(1, 1fr);
      gap: 10px;
      width: 80%;
      max-width: 800px;
    }
  
    
  }

  .card-container {
    perspective: 1000px;
  }
  
  .card {
    width: 100%;
    aspect-ratio: 3 / 4;
    position: relative;
    transform-style: preserve-3d;
    transition: transform 0.6s;
    cursor: pointer;
  }
  
  .card.is-flipped {
    transform: rotateY(180deg);
  }
  
  .card-front, .card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
  }
  
  .card-front {
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
  }
  
  .card-front video {
    width: 100%;
    height: 90%;
    object-fit: cover;
  }
  
  .card-title {
    background-color: #003471;
    color: white;
    text-align: center;
    padding: 15px;
    font-size: 20px;
  }
  
  .card-back {
    background-size: cover;
    background-position: center;
    transform: rotateY(180deg);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 20px;
  }
  
  .card-back h3 {
    color: #fff;
    text-align: center;
    font-size: 18px;
    margin-bottom: 20px;
    background: rgba(0, 0, 0, 0.5);
    padding: 10px;
    border-radius: 5px;
  }
  
  .btn {
    background-color: #007BFF;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.3s ease;
  }
  
  .btn:hover {
    background-color: #0056b3;
  }