.but 
{
	display: inline-block;
	padding: 10px 20px;
	text-decoration: none;
	box-sizing: border-box;
	font-family: Helvetica, Arial, sans-serif;
	font-size: 18px;
	border: 0px;
	text-transform: uppercase;
	width: 100%;
	text-align: center;
	font-weight: bold;
}

.but:hover 
{
	background-image: linear-gradient(to bottom, transparent, rgba(0,0,0,.15));
	cursor: pointer;
}

/* EFEITOS */
 
.but-shadow {
box-shadow: 1px 1px 1px #999;
}
 
.but-rc {
border-radius: 4px;
}
 
/* TAMANHOS */
.but-large {
font-size: 140%;
}