*{padding: 0; margin: 0;}

body {font-family: 'quicksand';}

header{ 
   background-image: url(https://images.unsplash.com/photo-1463171515643-952cee54d42a?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=1050&q=80);
    background-size: cover;
    background-position: center;
    height: 15rem;}

nav .rotulo {
    font-family: sans-serif;
    color: #fff;
    display: flex;
    background-color: gainsboro;
    padding: 1rem;
    width: 200%;
    align-items: center;}
.rotulo ul {    
    color: #fff;
    display: flex;
    background-color: rgba(0, 0, 0, 0.2);
    padding: 1rem;
    width: 100%;
    justify-content: space-between;}

.rotulo li {list-style:none; }

.rotulo a {     
    text-decoration: none;
    color: #fff;
    width: 100%;
    margin: 1rem;
    padding: 0rem 2rem 2rem 2rem;}

/*********************
*  CENTER   * 
**********************/

center {
    display: block;
    text-align: -webkit-center;}

center img {
    margin: auto;
    display: block;
    border: 0.2rem solid #fff;
    border-radius: 5rem;
    padding: 0;
    width: 150px;}

h1 { 
    text-align: center; padding: 1rem;
    color: white;
    font-size: 2rem;
    font-weight: 400;
    margin-top: 1rem;
    padding-top: 0.8rem;
    letter-spacing: 0.20rem;
    text-transform: uppercase;} 

.titulodg {
    text-align: center;
    color: dimgray;
    font-size: 1rem;
    font-weight: 400;
    margin-bottom: 2rem;}
main{
    padding: 0;
    text-align: center;
    margin: 1rem;}



h2 {
    color: black; 
    text-decoration: none;
    font-size: 1rem;
    margin-top: 4rem;
    padding: 3 0 0rem 1rem;
    letter-spacing: 0rem;
    font-family: 'Quicksand', sans-serif;
    font-weight: 700;
    text-align: center;
}



section {
     width: 100%;
}

.materias {
    display: flex;
    justify-content: space-around;
    margin: 0 rem, 2rem;
    font-size: 4rem;
    width: auto;
    flex-wrap: wrap;
   
    
}


article div {
    font-size: 0.8rem;
    color: dimgray;
    text-align: center;
    padding: 1.5rem;
    list-style-type: none;
    justify-content: center; 
    display: inline;
    width: 30%;

}

article div p {
    font-family: 'Quicksand', sans-serif;
    font-weight: 400;
    font-size: 0.8rem;
    text-align: center;
    list-style-type: none;
    line-height: 2rem;
    }

footer {
    color: #7c7c7c;
    font-size: 0.7rem;
    text-align: center;
    margin: 5rem 3rem 1rem 3rem;
    padding: 2rem;
    width: auto;}