* {
    margin: 0px;
    padding: 0px;
/*    font-family: helvetica;*/
}

.contenedor1 {
    width: 80%;
    margin: 0 auto;
}

h1 {
    text-align: center;
}
/*

strong {
    color: darkblue;
    font-weight: bold;
}
*/

em {
    color: red;
    font-weight: bold;
}

.grid-container,
.grid-container2 {
    /*despliegue*/
    display: grid;
    /*grid de columnas*/
    grid-template-columns: auto auto;

    background-color: #e7e7e7;
    padding: 10px;
}

.grid-container2 {
    /*despliegue inline*/
    display: inline-grid;
}

.grid-item {
    color: black;
    /*
  background-color: rgba(255, 255, 255, 0.6);
  border: 1px solid rgba(0, 0, 0, 0.2);
*/
    padding: 20px;
    font-size: 1.0em;
    text-align: left;
}

.video-player {
    display: block;
    width: 100%;
    height: 100%;
    overflow: hidden;
    position: relative;
}

.video-frame {
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
}

.panel-group {
    display: none;
    width: 80%;
    margin: 0 auto;
}

@media (max-width:768px) {
    
    .grid-container {
        display: none;
    }
    
    .panel-group {
        display: block;
    }
}