@keyframes blink {
  50% { opacity: 0; }
}

@keyframes rainbow {
  0% { color: #ff0000; }
  16% { color: #ff8800; }
  33% { color: #ffff00; }
  50% { color: #00ff00; }
  66% { color: #00ffff; }
  83% { color: #ff00ff; }
  100% { color: #ff0000; }
}

.blink { animation: blink 1s step-end infinite; }
.rainbow { animation: rainbow 2s linear infinite; font-weight: bold; }

body {
  background-color: #000080;
  background-image:
    radial-gradient(white 1px, transparent 1.5px),
    radial-gradient(white 1px, transparent 1.5px);
  background-size: 50px 50px;
  background-position: 0 0, 25px 25px;
  color: #ffff00;
  font-family: "Comic Sans MS", "Comic Sans", "Chalkboard", cursive;
  text-align: center;
}

a:link { color: #00ffff; }
a:visited { color: #ff66ff; }
a:hover { color: #ff0000; background: #ffff00; }
a:active { color: #ff0000; }

h1, h2, h3 {
  color: #ff00ff;
  text-shadow: 2px 2px 0 #00ffff, 4px 4px 0 #000;
  text-align: center;
}

hr {
  border: none;
  height: 4px;
  background: linear-gradient(90deg, red, orange, yellow, green, cyan, blue, magenta);
}

table {
  margin: 0 auto;
  border: 3px outset #c0c0c0;
  background: #000080;
}

td, th {
  border: 2px inset #c0c0c0;
  padding: 6px 10px;
  color: #ffff00;
}

.box {
  display: inline-block;
  margin: 10px auto;
  padding: 12px 18px;
  background: #000080;
  border: 3px ridge #c0c0c0;
  box-shadow: 4px 4px 0 #000;
}

.construction {
  background: repeating-linear-gradient(
    45deg,
    #ffcc00,
    #ffcc00 10px,
    #000 10px,
    #000 20px
  );
  color: #000;
  font-weight: bold;
  padding: 6px 12px;
  display: inline-block;
  margin: 8px 0;
  -webkit-text-stroke: 1px #fff;
}

.counter {
  display: inline-block;
  background: #000;
  color: #00ff00;
  font-family: "Courier New", monospace;
  font-weight: bold;
  padding: 4px 10px;
  border: 2px inset #888;
  letter-spacing: 4px;
}

.fire {
  color: #ff6600;
  text-shadow: 0 0 4px #ff0, 0 0 8px #f80, 0 0 12px #f00;
  font-weight: bold;
}

.glow {
  color: #fff;
  text-shadow: 0 0 4px #0ff, 0 0 8px #0ff, 0 0 12px #00f;
}

.signpost {
  border: 4px double #ffff00;
  padding: 10px;
  margin: 12px auto;
  display: inline-block;
  background: rgba(0, 0, 80, 0.7);
}

.webring {
  border: 2px ridge #ff00ff;
  padding: 8px;
  margin: 12px auto;
  display: inline-block;
  background: #000;
}