JSFiddle - React, Tailwind, and code Playground

HTML

<a class="download_button_block js-send_btn" href="http://google.com/">
    <span class="download_button">
        <span class="icon">
            <span class="arrow"></span>
        </span>
        <span class="text">Скачать видеоуроки</span>
    </span>
</a>

CSS

.download_button_block {
	-webkit-box-sizing: border-box;
	-moz-box-sizing: border-box;
	box-sizing: border-box;
	display: block;
	margin: 0 auto;
	width: 100%;
	max-width: 476px;
	height: 88px;
	-webkit-border-radius: 5px;
	-moz-border-radius: 5px;
	border-radius: 5px;
	outline: none;
  cursor: default;
}

.download_button {
	-webkit-box-sizing: border-box;
	-moz-box-sizing: border-box;
	box-sizing: border-box;
	display: block;
	float: left;
	padding: 0;
	width: 100%;
	height: 85px;
	border: none;
	-webkit-border-radius: 5px;
	-moz-border-radius: 5px;
	border-radius: 5px;
	background: #f7c62f;
	-webkit-box-shadow: 0 3px 0 0 #b26303, 0 0 0 1px #ffba56 inset;
	-moz-box-shadow: 0 3px 0 0 #b26303, 0 0 0 1px #ffba56 inset;
	box-shadow: 0 3px 0 0 #b26303, 0 0 0 1px #ffba56 inset;
	cursor: pointer;
	-webkit-text-shadow: 1px 1px 0 rgba(255,255,255,0.3);
	-moz-text-shadow: 1px 1px 0 rgba(255,255,255,0.3);
	text-shadow: 1px 1px 0 rgba(255,255,255,0.3);
	outline: none;
	-webkit-appearance: none;
	-webkit-animation: shadow  1.5s infinite ease-in-out;
	animation: shadow  1.5s infinite ease-in-out;
}

.download_button:hover {
	background: #fed146;
}

.download_button_block:active .download_button:hover {
	margin: 3px 0 0 0;
	-webkit-box-shadow: none;
	-moz-box-shadow: none;
	box-shadow: none;
}

.download_button .icon {
	display: block;
	float: left;
	margin: 11px 0 0 0;
	width: 75px;
	height: 63px;
	border-right: 1px solid #d69517;
	background: url(../images/download_button__icon.png) 29px center no-repeat;
	position: relative;
}

.download_button .arrow {
	display: block;
	width: 20px;
	height: 19px;
	background: url(../images/download_button__arrow.png) center no-repeat;
	position: absolute;
	top: 14px;
	left: 29px;
	-webkit-animation: arrow  1.5s infinite ease-in-out;
	animation: arrow  1.5s infinite ease-in-out;
}

.download_button .text {
	display: block;
	float: left;
	width: calc(100% - 76px);
	font-family: 'Roboto', sans-serif;
	font-weight: 700;
	font-size:...