.protobyte_copy {
    display: inline-block;
    position: relative;
    color:#aaa;
    text-decoration: none;
}
.protobyte_copy img {
    filter: grayscale(100%);
    -webkit-filter: grayscale(100%);
    transition: 0.8s;
    opacity: 0.5;
}
.protobyte_copy:hover img {
    filter: none;
    -webkit-filter: none;
    opacity: 1;
}
.table-simple {
	box-sizing: border-box;
}
.auto-tube__list {
	-webkit-columns: 3; 
	-moz-columns: 3; 
	columns: 3;
}
#footerLine .callback {
	display: none;
}
.tubes-sample {
    max-width: 900px;
}
@media (max-width: 500px) {
	.auto-tube__list {
		-webkit-columns: 2; 
		-moz-columns: 2; 
		columns: 2;
	}
}