/* Buttons Preview */
.usof-btn-preview {
	display: flex;
	align-items: center;
	min-height: 60px;
	max-height: 20vh;
	cursor: pointer;
	}
	.usof-btn {
		text-align: center;
		line-height: 1.2; /* fallback value */
		padding: .8em 1.8em; /* fallback value */
		position: relative;
		overflow: hidden;
		transform: translateZ(0); /* fix fo Safari */
		transition-property: background, border, box-shadow, color, opacity, transform;
		transition-duration: .3s;
		-webkit-tap-highlight-color: rgba(0,0,0,0);
		}
		.usof-btn:before {
			content: '';
			position: absolute;
			top: 0;
			left: 0;
			right: 0;
			bottom: 0;
			border-radius: inherit;
			border-style: solid;
			border-color: inherit;
			border-image: inherit;
			}
		.usof-btn-label {
			position: relative;
			z-index: 1;
			}
		.usof-btn:after {
			content: '';
			position: absolute;
			top: 0;
			left: 0;
			right: 0;
			transition: height .3s, opacity .3s;
			}
		.usof-btn-preview.hov_fade .usof-btn:after {
			bottom: 0;
			opacity: 0;
			}
		.usof-btn-preview.hov_fade .usof-btn:hover:after {
			opacity: 1;
			}
		.usof-btn-preview.hov_slide .usof-btn:after {
			height: 0;
			}
		.usof-btn-preview.hov_slide .usof-btn:hover:after {
			height: 100%;
			}