:root{
    --color1:#05AFF2;
    --color2:#F2F2F2;
    --color3:#99E2F2;
    
}
*{
    padding:0;
    margin:0;
    box-sizing: border-box;
    font-family: sans-serif;
}
#contenedor{
    Width:80%;
    margin:20px auto;
    border:1px solid grey;
    padding: 5px;;
}
header{
    height: 100px;
    background-color: var(--color1);
    display:flex;
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    margin:5px;
}
header img{
    height: 100%;
}
header h3{
    color:var(--color2);
    padding-right: 10px;
    text-transform: uppercase;
}
nav{
    margin:10px;
    height: 90px;
}
nav ul{
    display:flex;
    flex-direction: row;
    justify-content: end;
}
nav ul li{
    list-style-type: none;
    min-width: 120px;
}
nav ul li a{
   text-decoration: none;
   background-color: black;
   color:var(--color2);
   padding:5px 20px;
   display: block;
}
nav ul li a:hover{
    background-color: #434343;
}
nav li ul{
    display:flex;
    flex-direction: column;
    display:none;
}
nav li:hover >ul{
    display:block; /* muestra el menu de 2do nivel*/
}
main{
    margin:5px;
    padding:5px;
    text-align: justify;
    display: flex;
    flex-direction: row;
    justify-content: space-around;

}
section{
    width:60%;
    padding:5px;
}
aside{
    width:30%;
    padding:5px;
}
article{
    margin:10px 5px;
}
article img{
    max-width: 90%;
    display:block;
    margin:auto;
    border-radius: 5px;;
}
aside img{
    max-width: 90% ;
    display:block;
    margin:auto
}h4,h5{
    text-align: center;
    padding:5px;
}
h4{
    background-color: black;
    color:var(--color2);
    padding:10px 0;
    text-transform: capitalize;
}
h5{
    margin-top:10px;
}
p{
    padding:10px;
}
article li{
    padding:5px 10px;
}
footer{
    background-color: var(--color1);
    margin:5px;
    padding:5px;
    text-align: center;
    color:var(--color2);
}
footer a{
    color:var(--color2);
}
footer p{
    padding:2px;
}
footer i{
    font-size: 1.5em;
}

/*estilo de video youtube*/
#content{
    width:70%;
    margin:25px auto;
    border:1px solid grey;
}
#titulo{
    background-color: #434343;
    color:var(--color2);
    font-size: 1.5em;
    text-align: center;
    padding: 10px;
    margin:10px;
}
#video-responsivo{
padding: 10px;
position:relative;
padding-bottom: 56.25%;
height: 0;
margin:10px;
}
iframe,video{
position: absolute;
top:0;
left:0;
width:100%;
height: 100%;
}
#inicio{
    text-align: center;
    font-size: 1em;
}