.portada
{
    width: 100%;
    height: 30vh;
   
}
.portada img
{
    width: 100%;
    height: inherit;
    max-height: inherit;
  
}
.portada
{
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;   
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    min-height: 35vh;
    max-height: 35vh;
}
.portada h2
{

    border-radius: 20px;
    margin: 0px 5px;
    padding: 10px 25px;
    font-size: 40px;
    font-weight: bolder;   
    color: white;  
}