* {
    font-family: Arial, Helvetica, sans-serif;
}

header {
    background-color: rgb(77, 69, 93);
}

header h1{
    background-color: rgb(0, 129, 201);
    margin: 0;
    padding: 10px;
    color: white;
    text-align: center;
}

.articulos {
    padding: 10px;
    border-style: solid;
    border-width: 2px;
    border-color: rgb(91, 192, 248);
}

.principal{
    display: flex;
    justify-content: space-between;
}

.textos {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.caja {
    color: black;
    background:rgb(156, 222, 248);
    border: rgb(91, 192, 248) 2px solid;
    margin: 5px;
    padding: 5px;
}

aside {
    background: rgb(156, 222, 248);
    /*width: 32%;*/
    padding:5px;
    box-sizing: border-box;
    margin-bottom: 10px;
    margin-top: 10px;
    text-align: center;
    border-style: solid;
    border-width: 2px;
    border-color: rgb(91, 192, 248);
}

aside img{
    margin: auto;
    border-radius: 50px;
    border-style: solid;
    border-width: 3px;
    border-color: black;
}

header, footer, #menu, .principal{
    width: 90%;
    margin: auto;
}

#menu {
    background-color:rgb(91, 192, 248);
    margin-top: 5px;
    margin-bottom: 5px;
}

#menu ul{
    list-style: none;
    margin: 0;
    padding: 0;
}

#menu ul li{
    display: inline-block;
    text-align: center;
}

#menu ul li a{
    color: white;
    display: block;
    padding: 20px 20px;
    text-decoration: none;
}

#menu ul li a:hover{
    background-color: rgb(0, 129, 201);
}

footer {
    color: white;
    background: black;
    clear: both;
}

footer p {
    text-align: center;
    padding: 10px;
}