@import url(https://fonts.googleapis.com/css?family=Exo:400,600,900);
body {
    margin: 0px;
    font-family: Exo;
}

header {
    width: 100%;
    position: fixed;
    margin: 0px;
    top: 0;
    background-color: black
}

header h1 {
    text-align: center;
    color: white;
}

nav ul {
    padding: 0px;
    text-align: center;
}

nav ul li {
    text-align: center;
    display: inline-block;
    color: white;
   
}

nav ul li a {
    color: white;
    text-decoration: none;
    padding: 0 10px;
}

main {
    padding-top: 9em;
}

section h2 {
    text-align: center;
    margin-top: 0px;
}

img {
    width: 100%;
    margin: auto;
}

.foto {
    width: 20%;
    margin: auto;
}

article {
    display: inline-block;

}

.lista {
    float: left;
    text-align: left;
}

.container-900 {
    width: 100%;
    max-width: 900px;
    margin: 0px auto;
    text-align: center;
}
.estilo-lista {    padding: 0px;
    margin: 0px;
    list-style-type: none;
}

a {
    width: 51%;
    display: inline-block;
}

.a {
    color: white;
}