body {
    animation: a 5s infinite alternate;
    color: yellow;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-image: url(https://images.squarespace-cdn.com/content/v1/582e76425016e1e2d5d3adff/1537827918819-3W1NQ7O95VJRCX6X2KNT/BelAndradeLima-UnderArmour-Sport.gif?format=1500w);
    background-position: center;
}

legend {

    text-align: center;
    background-color: black;
}

header {
    text-align: center;
    font-size: 49px;
    background-color: black;
    margin-top: 30;
    font-family: Impact, Haettenschweiler, 'Arial Narrow Bold', sans-serif;
    
   
}

h1 {
    text-align: center;
    background-color: black;
    margin-right: 34% ;
    margin-left: 34% ;
}

#nov {

    padding-left: 57px;
    display: inline-block;
   
}

#crb {
    
    display: inline-block;
    padding-left: 44px ;
    padding-right:44px ;

}

#pon{
    display: inline-block;

}

#bah {

    display: inline-block;
   
    padding-left: 57px;
    display: inline-block;
 
}

#gre
{
    display: inline-block;
    padding-left: 44px ;
    padding-right:44px ;
    margin-bottom: 60px;
}

#nau {
    display: inline-block;
    margin-top: 109px;

}