html, body {
	margin: 0;
	padding: 0;
	font-family: Arial, Verdana, Tahima, Geneva, sans-serif;
}
html { 
  background: url(../images/background.jpg) no-repeat center center fixed; 
  -webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
}

.tresc { position: relative; width: 400px; height: 400px; margin: 0 auto; background: #3f5d6f; }
.wewn { position: absolute; width: 100%; background: #f0ae00; top: 50%; transform: translateY(-50%); }