* {
  box-sizing: border-box;
  position: relative;
  font-family: Trebuchet MS, Helvetica, sans-serif;
}
a:link { text-decoration: none; color: blue }
a:visited { text-decoration: none; color: blue }
a:hover { text-decoration: underline; color: red }
a.link-external {
  background: url(../css/external.gif) no-repeat;
}