art/_sass/components/_button.scss

///
/// Forty by HTML5 UP
/// html5up.net | @ajlkn
/// Free for personal and commercial use under the CCA 3.0 license (html5up.net/license)
///

/* Button */

	input[type="submit"],
	input[type="reset"],
	input[type="button"],
	button,
	.button {
		@include vendor('appearance', 'none');
		@include vendor('transition', (
			'background-color #{_duration(transition)} ease-in-out',
			'box-shadow #{_duration(transition)} ease-in-out',
			'color #{_duration(transition)} ease-in-out'
		));
		background-color: transparent;
		border: 0;
		border-radius: 0;
		box-shadow: inset 0 0 0 2px _palette(fg-bold);
		color: _palette(fg-bold);
		cursor: pointer;
		display: inline-block;
		font-size: 0.8em;
		font-weight: _font(weight-bold);
		height: 3.5em;
		letter-spacing: _font(letter-spacing-alt);
		line-height: 3.5em;
		padding: 0 1.75em;
		text-align: center;
		text-decoration: none;
		text-transform: uppercase;
		white-space: nowrap;

		&:hover, &:active {
			box-shadow: inset 0 0 0 2px _palette(highlight);
			color: _palette(highlight);
		}

		&:active {
			background-color: transparentize(_palette(highlight), 0.9);
			box-shadow: inset 0 0 0 2px desaturate(darken(_palette(highlight), 15), 5);
			color: desaturate(darken(_palette(highlight), 15), 5);
		}

		&.icon {
			&:before {
				margin-right: 0.5em;
			}
		}

		&.fit {
			display: block;
			margin: 0 0 (_size(element-margin) * 0.5) 0;
			width: 100%;
		}

		&.small {
			font-size: 0.6em;
		}

		&.big {
			font-size: 1.25em;
			height: 3em;
			line-height: 3em;
		}

		&.next {
			padding-right: 4.5em;
			position: relative;

			&:before, &:after {
				@include vendor('transition', 'opacity #{_duration(transition)} ease-in-out');
				background-position: center right;
				background-repeat: no-repeat;
				background-size: 36px 24px;
				content: '';
				display: block;
				height: 100%;
				position: absolute;
				right: 1.5em;
				top: 0;
				vertical-align: middle;
				width: 36px;
			}

			&:before {
				background-image: svg-url('<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="36px" height="24px" viewBox="0 0 36 24" zoomAndPan="disable"><style>line { stroke: #{_palette(fg-bold)}; stroke-width: 2px; }</style><line x1="0" y1="12" x2="34" y2="12" /><line x1="25" y1="4" x2="34" y2="12.5" /><line x1="25" y1="20" x2="34" y2="11.5" /></svg>');
			}

			&:after {
				background-image: svg-url('<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="36px" height="24px" viewBox="0 0 36 24" zoomAndPan="disable"><style>line { stroke: #{_palette(highlight)}; stroke-width: 2px; }</style><line x1="0" y1="12" x2="34" y2="12" /><line x1="25" y1="4" x2="34" y2="12.5" /><line x1="25" y1="20" x2="34" y2="11.5" /></svg>');
				opacity: 0;
				z-index: 1;
			}

			&:hover, &:active {
				&:after {
					opacity: 1;
				}
			}

			@include breakpoint(large) {
				padding-right: 5em;
			}
		}

		&.special {
			background-color: _palette(fg-bold);
			box-shadow: none;
			color: _palette(bg);

			&:hover, &:active {
				background-color: _palette(highlight);
				color: _palette(bg) !important;
			}

			&:active {
				background-color: desaturate(darken(_palette(highlight), 15), 5);
			}
		}

		&.disabled,
		&:disabled {
			@include vendor('pointer-events', 'none');
			cursor: default;
			opacity: 0.25;
		}
	}