to do list.css

#container{
	background-color:#f7f7f7;
	margin:100px auto;
	width:360px;
	box-shadow:0 0 5px rgba(0,0,0,0.7);
}
span{
	background-color:red;
	margin-right:20px;
	height:40px;
	text-align:center;
	color:white;
	display: inline-block;
	width:0;
	margin-left:0;
	opacity:0;
}

li:hover span{
	width:40px;
	transition:0.2s linear;
	opacity:1;
}

.completed{
	text-decoration: line-through;
	color:gray;
}
input{
	background-color:#f7f7f7;
	width:100%;
	font-size:18px;
	padding:13px 13px 13px 20px;
	box-sizing:border-box;
	color:#2980b9;
	border:3px solid rgba(0,0,0,0);
}

input:focus{
	background-color: #fff;
	border:3px solid #2980b9;
	outline: none;
}
i{
	float:right;
}
h1{
	background-color: #2980b9;
	margin:0;
	color:white;
	text-transform: uppercase;
	padding:10px 20px;
	font-size:24px;
	font-weight:normal;
}

ul{
	list-style-type: none;
	margin:0;
	padding:0;
}

li{
	padding:15px 20px;
	font-family:segoe print;
	background-color: #fff;
	height:40px;
	line-height:40px;
	color:#666;
	padding:0;
}

body{
	background: #a8ff78;  /* fallback for old browsers */
background: -webkit-linear-gradient(to right, #78ffd6, #a8ff78);  /* Chrome 10-25, Safari 5.1-6 */
background: linear-gradient(to right, #78ffd6, #a8ff78); /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */

}

li:nth-of-type(2n){
	background-color: #f7f7f7
}