body{
    background: #136a8a;  /* fallback for old browsers */
    background: -webkit-linear-gradient(to right, #267871, #136a8a);  /* Chrome 10-25, Safari 5.1-6 */
    background: linear-gradient(to right, #267871, #136a8a); /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */

}
article {
    display:flex;
    justify-content: center;
    margin : 10px;
    background: #cfd6d0;
    border-radius: 5px;
    padding:15px;
}
#contenedorIntroduccion{
    background:#EEEE;
    text-align:normal;
    width: 100%;
    max-width: auto;
    margin: 0 auto;
    display: flex;
    font-size:18px;
    
  }
#imagenInro{s
    width: 450px;
    height: 300px;
    padding: 20px;

  }

#contenedorIntroduccion p{
    text-align: justify;
    font-style: normal;
    margin-left: 40px;
    width: 90%;
    max-width: auto;
}
#contenedorIntroduccion h1{
    color:brown;
    text-align: center;
}
article div {
    width :400px;
    background: #EEEEEE;
    padding: 20px;
    border-radius: 6px;
}

article div p {
    background: #d3eefa;
    border-radius: 5px;
    font-weight: 300;
    padding :15px;
    font-style: italic;
    color : #3b72a0;
    text-align: justify;
    font-size: 15px;
}
article div h1{
    color: brown;
    
}

article  img {
    margin : 15px;
}

footer{
    background : #EEEEEE;
    border-radius: 5px;
    padding : 2px;
    display : flex;
}

.footer-p{
    color : black;
    font-weight: bolder;
    font-size: 20px;
    width : 50%;
    font-style: oblique;
    text-align: center
}
#contenedorPrincipal{
    display:flex;
    width:auto;
}
section {
  width: 80%;  
}

aside{ 
    width: 20%;
    border: 1px white solid;
    padding:5px;
    border-radius: 2px;
    background:#EEEEEE;
    margin: 5px;
    opacity: 0.5;

}
aside:hover{
    opacity: 1;
}
aside img{
    width: 200px;
    height: 200px;
    padding: 5px;

}
aside p{
    border-radius:5px;
    font-weight: 300;
    padding :10px;
    font-size: 15px;
    text-align: justify;
}
img{
    width: 450px;
    height:300px;
    
}