body{background-image: url('tumblr_inline_mlky878ojb1r53miq.png');}

header{margin: auto;margin-top:10px; width:50%;height:20%;background:rgba(0,0,0,0.5);border:solid;border-color:grey; 
border-radius: 10; color: white;padding: 5%;box-shadow: 0 0 50px 5px #808080;text-align:center;}


main{margin: auto;margin-top:5%; width:50%;background:rgba(0,0,0,0.5);border:solid;border-color:grey; 
border-radius: 10; color: white;padding: 5%;box-shadow: 0 0 50px 5px #808080;
text-align:center;}


nav{margin: auto; width:50%;background:rgba(0,0,0,0.5);border:solid;border-color:grey; 
border-radius: 10; color: white;padding: 5%;box-shadow: 0 0 50px 5px #808080;text-align:center;}

a{border: dotted; border-color: white}
nav, a:link{color: white;}
a:hover{color:grey;border-color:grey}