.mailknop {
	--primary: #0092cf;
	--secondary: #756341;
	--base: #fff;
	--bg: #f3f3f3;
	/*height: 100vh;*/
    position: absolute;
    height: 100%;
	width: 100%;
	display: flex;
	justify-content: center;
	align-items: center;
	/*font-family: 'Montserrat', Arial, Helvetica, sans-serif;*/
    font-family: 'Lato', Calibri, Arial, sans-serif;
	font-size: 12px;
	color: var(--primary);	
	/*background: var(--bg);*/
	-webkit-user-select: none;
	   -moz-user-select: none;
	    -ms-user-select: none;
	        user-select: none;
    border-radius: 50%;
    transform: scale(0.7);
}

.mailknop span {
	display: inline-block;
	margin: 0 8px;
	font-size: 3rem;
    color: var(--base);
}

input {display: none;}

label {
	--w: 90px;
	--p: 2px;
	--ease: cubic-bezier(0.165, 0.84, 0.44, 1);
	position: relative;
	padding: var(--p);
	width: var(--w);
	border: 3px solid var(--secondary);
	border-radius: var(--w);
	cursor: pointer;
	background: var(--base);
}

label:before, label:after {
	position: absolute;
	width: 50%;
	top: calc(50% - .6em);
	display: inline-block;
	text-align: center;
	font-size: 3em;
	color: var(--secondary);
	transition: all .6s var(--ease);
	z-index: 10;
}

label:before {
	content: '';
    font-size: 2.5em;
    top: 0.15em;
	left: 0;
	color: var(--bg);
}
label:after {
	content: '@';
    font-size: 2.5em;
    top: 0.15em;
	left: 45px;
}

label i {
	--d: calc(var(--w)/2 - var(--p)/2);
	position: relative;
	display: block;
	height: var(--d);
	width: var(--d);
	border: 1px solid rgba(0,0,0,.1);
	border-radius: 100%;
	background: var(--primary);
	transition: all .6s var(--ease);
}

input[type="checkbox"]:checked + label i {
	transform: translatex(43px);
}

input[type="checkbox"]:checked + label:before {
	color: var(--secondary);
}

input[type="checkbox"]:checked + label:after {
	color: var(--base);
}