to-do-list.css

body{
	background-color: #262626;
	margin: 0;
	padding: 0;
	font-family: "Montserrat", sans-serif;	
}

ul{
	margin: 0;
	padding: 0;
	position: absolute;
	top: 50%;
	left: 50%;
	transform: translate(-50%, -50%);
	background: #0C4C76;  
	padding: 10px 20px;
	width: 600px;
	border: 1px solid grey;
}

ul li{
	list-style: none;
	position: relative;
	padding: 10px 0;
	border-bottom: 1px solid rgba(0,0,0,0.2);
}

ul li:last-child{
	border-bottom: none;
}

ul li label{
	font-size: 60px;
	color: #fff;
	padding-left: 90px;
	cursor: pointer;
}

ul li label input{
	opacity: 0;
	cursor: pointer;
}

ul li label .check{
	position: absolute;
	top: 20px;
	left: 25px;
	width: 50px;
	height: 50px;
	background-color: #000;
	display: block;
	box-sizing: border-box;
	border: 2px solid #fff;
	border-radius: 12px;
}

ul li label .check:before{
	content: "";
	position: absolute;
	top: 9px;
	left: 9px;
	right: 9px;
	bottom: 9px;
	background: #F08080;
	border-radius: 2px;
	transition: .5s;
	transform: translateX(520px);
}

ul li label input:checked ~ .check:before{
	background: #FA8072;
	box-shadow: 0 0 15px #FA8072;
	transform: translateX(0);
}