header{
    width: auto;
    height: 85px;
    background-color: yellow;
    text-align: center;
    font-size: 34px;
    color: blue;
    text-shadow: 4px 5px 6px #aaa;
    
}
header article{
    background-color: yellow;
    text-align:center;
    font-size: 20px;
    width: 50%;
    height: 70px;
    color: blue;
    border-bottom-color:black;
    border-bottom-width: thin;
    border-bottom-style:ridge;
}
nav{
    text-align: center;
    top: 5px;
    position: relative;
    width: auto;
    margin-left: 5px;
    margin-right: 5px;
    height: 20px;
    font-size-adjust: auto;
    word-spacing:15px;
    color: deepskyblue;
    background-color: black;
}
nav a{
    text-decoration: none;
    color: aliceblue;
}
a:hover{
    background-color: deepskyblue;
}
section{
     width: 25%;
    height: 80%;
    float: left;
    position: relative;
    top:7px;
    margin-left: 5px;
    margin-right: 5px;
    width:0%;
    line-height: 80px;
    text-align: lefth;
    word-spacing: 100px;
    background-color: white; 
}
section img{
    display
    box-shadow: 4px 5px 6px #aaa;
    transition: transform 0.5s;
}
section img:hover{
    transform: scale(1.05);
}
section tr{
    width:auto;
}
aside{
    position:relative;
    background-color:snow;
    color: black;
    margin-top: 10px;
    width:15%;
    margin-left: 83%;
    margin-right: 0px;
    
}

#cabecera img{
    align-content: center;
    width: 100%;
}

 article{
     font-size: 18px;
    text-align: justify;
    float: right;
    width: 50%;
    height: 320px;
    background-color: white;
    color: black;
}
footer{
    position:fixed;
    bottom: 0;
    width: auto;
    height: 30px;
    font-size-adjust: auto;
    background-color: black;
    color: deepskyblue;
    line-height: 35px;
    font-size: 20px;
    margin-bottom: 2px;
    letter-spacing: 2px;
}