body {
    background: white;
    font-family: 'Lato', sans-serif;
}

.anchoContenedorPrincipal {
    width: 90%;
}

.centrarDiv {
    margin-left: auto;
    margin-right: auto;
}

#divPrincipal {
    background: turquoise;
    vertical-align: top;
}

#imgBanner {
    display: inline-block;
    width: 25%;
}

#textBanner {
    display: inline-block;
    background: white;
    vertical-align: top;
}

.fila {
    text-align: center;
    background: violet;
    margin-top: 5px; 
}

.tarjeta {
    margin-right: auto;
    margin-left: auto;
    display: inline-block;
    border: 1px solid #000000;
    width: 23%;
    vertical-align: top;
    height: 230px;
}


.tarjeta img {
    width: 100%;
    height: 150px;
}

.tarjeta .descripcion {
    height: 75px;
    background: white;
}

.tarjeta .descripcion span {
    vertical-align: middle;
}

#menu {
    background: black;
    text-align: center;
}

#menu li{
    display: inline-block;
    color: white;
    width: 100px;
}

#menu li:hover {
    background: #757575;
}

#menu a {
    color: yellow;
    text-decoration: underline;
}

#menu a:visited {
    color: yellow;
    text-decoration: underline;
}