body.main  {font-family:Arial,helvetica; background:lightyellow; color:black; font-size:medium}
body.toc   {font-family:Arial,helvetica; background:darkblue; color:black}
table.alert{font-family:Arial,helvetica; background:lightgreen; color:black; font-size:small}
table.exam {font-family:Arial,helvetica; background:#eeeebb; color:black; font-size:small}
table.main {font-family:Arial,helvetica; background:#ffcc99; color:black; font-size:small}
table.toc  {font-family:Arial,helvetica; background:#ffcc99; color:black; font-size:small}
table.rule {font-family:Arial,helvetica; color:maroon; font-weight:bold}
A:link     {text-decoration:underline; color:blue}
A:active   {text-decoration:underline; color:blue}
A:visited  {text-decoration:underline; color:blue}
A:hover    {text-decoration:none; color:red} 

@keyframes blink {
  50% {
    opacity: 0.0;
  }
}
@-webkit-keyframes blink {
  50% {
    opacity: 0.0;
  }
}
.blink {
  animation: blink 1s step-start 0s infinite;
  -webkit-animation: blink 1s step-start 0s infinite;
}