*{
    box-sizing: border-box;
    list-style: none;
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
    
    
}
body{
    margin: 0px;
    padding: 0px;
    text-decoration: none;
}

html{
    background-color: #feffff;
}
header{
    display: flex;
    font-size: 1em;
    justify-content: space-evenly;
    background-color: #17252a;
    height: auto;
    align-items: center;
    color: white;
}
header h1{
    max-width: 75%;
}
header img{
    border-radius: 50%;
    height: 40%;
   
}
#bajada{
    font-size: .5em;
}

#navegar{
    background-color: #3aafa9;
    display: flex;
    flex-direction: row;
    justify-content: space-evenly;
    height: 100px;
    align-items: center;
    width: 100%;
    text-align: center;
    padding: 0px;
   
}

#navegar li {
    width: 20%;
    background-color: #17252a;
    text-align: center;
    transition: 0.5s;
    font-size: 1em;
    border-radius: 30px;
    height: 50%;  
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
   
}

#navegar li a{
    text-decoration: none;
    color: white;
}

#navegar li:hover{
    background-color: black;
    color:gray;
    border: 1px solid white;
}

main{
    background-color: #def2f1;
    
}
.titulo{
    text-align: center;
    border-bottom:#66D7D1 4px solid;
}

.titulo h3{
    margin: 0px;
    background-color:#17252a;
}
.contenido{
    text-align: center;
}

.contenido :last-child{
    padding-bottom: 50px;
}

footer{
    background-color:#2b7a78;
    min-height: 100px;
    display: block;
    margin: auto;
    width: 100%;
    padding: 20px;
    margin-top: 20px;
    
}
footer p{
    width: 50%;
    font-size: 0.85em;
    text-align: center;
    margin:auto;
    color: white;
}

#materiasaprobadas, #cursando{
    font-size: 1.5em;
    color:  white;
}

main,nav{
    display: block;
    margin: auto;
}

@media screen and (min-width: 950px){
    main,nav{
        width: 75%;
    }
    header{
        font-size: 1.5em;
    }
    #materiasaprobadas, #cursando{
        font-size: 2em;
        padding-bottom: 5px;
    }
    main{
        display: flex;
        flex-direction: row;
        justify-content: space-around;
        padding: 20px;
    }
    .ladoa , .ladob{
        background-color:#c0e4e2;
        margin: 10px;
        text-align: center;
        
    }
    .ladob{
        height: 250px;
    }
    .titulo h3{
        padding-left: 10%;
        padding-right: 10%;
    }
    #navegar li {
        font-size: 1.5em;
    }
}