body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #082f68;
}
.tarjeta-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
}
.tarjeta {
    width: 400px;
    background-color: #fff;
    border-radius: 10px;
    box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.1);
    padding: 20px;
    margin: 20px;
    display: none;
}
.imagen {
    text-align: center;
}
.imagen img {
    width: 400px;
}