html, body {
    margin: 0;
    padding:0;
    overflow: hidden;
    background:black;
    background-image: url("../images/nasa.gov_CG_581910main_PIA14293_full.jpg");
    font-size:1vw;
}

div.titlebox {
  margin: 20px;
  background-color: #ffffff;
  border: 3px solid black;
  display: inline-block; /*used to adjust the size of the block, be sure to put this in another div to avoid them stacking inline.*/
  opacity: 0.7;
  filter: alpha(opacity=70); /* For IE8 and earlier */
}

div.linkbox {
  margin: 20px;
  background-color: #ffffff;
  border: 2px solid black;
  display: inline-block;
  opacity: 0.7;
  filter: alpha(opacity=70);
}

div.contactbox {
  position: absolute;
  bottom: 5px;
  left: 20px;
  background-color: #ffffff;
  border: 2px solid black;
  display: inline-block;
  opacity: 0.7;
  filter: alpha(opacity=70);
}

div.sourcebox {
  position: absolute;
  bottom: 5px;
  right: 15px;
  background-color: #ffffff;
  border: 2px solid black;
  display: inline-block;
  opacity: 0.4;
  filter: alpha(opacity=40);
}

div.textbox {
  margin: 10px;
}

/* unvisited link */
a:link {
    color: blue;
}

/* visited link */
a:visited {
    color: slatesblue;
}

/* mouse over link */
a:hover {
    color: red;
}