html {
	background: url('../img/profbooks.png') repeat;
}

body {
	margin: 0 auto;
	width: 800px;
	background: url('../img/cardboard2.png') repeat;
	padding: 10px;
}

#ads {
	display: none;
	position: fixed;
	top: 0;
	left: 0;
	right: 0;
	bottom: 0;
	background-color: rgba(128, 128, 128, 0.4);
	background: url('../img/cruise.gif') no-repeat center/50%;
}

.valign img {
	vertical-align: middle;
}

.halign {
	text-align: center;
}

.hidden {
	display: none;
}

.important {
	font-weight: bold;
}

.red {
	color: red;
}

.big {
	font-size: 2em;
}

.space {
	height: 20px;
}

.widther {
	width: 600px;
	margin: auto;
}

.blink {
  animation: blink-animation 0.5s steps(2, start) infinite;
  -webkit-animation: blink-animation 0.5s steps(2, start) infinite;
}

@keyframes blink-animation {
  to {
    visibility: hidden;
  }
}

@-webkit-keyframes blink-animation {
  to {
    visibility: hidden;
  }
}