h1 {
  background: #2980b9;
  color: white;
  margin: 0;
  padding: 10px 20px;
  text-transform: uppercase;
  font-size: 24px;
  font-weight: normal;
}

.fa-plus {
  float: right;
}

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

body {
  font-family: Roboto;
  background: -webkit-linear-gradient(90deg, #2BC0E4 10%, #EAECC6 90%);
  background:    -moz-linear-gradient(90deg, #2BC0E4 10%, #EAECC6 90%);
  background:     -ms-linear-gradient(90deg, #2BC0E4 10%, #EAECC6 90%);
  background:      -o-linear-gradient(90deg, #2BC0E4 10%, #EAECC6 90%);
  background:         linear-gradient(90deg, #2BC0E4 10%, #EAECC6 90%);
}

li{
  background: white;
  height: 40px;
  line-height: 40px;
  color: #667;
}

li:nth-child(2n) {
  background: #f7f7f7;
}

span {
  background: #e74c3c;
  height: 40px;
  margin-right: 20px;
  text-align: center;
  color: white;
  width: 0;
  display: inline-block;
  transition: 0.7s linear;
  opacity: 0;
}

li:hover span {
  width: 40px;
  opacity: 1.0;
}
input {
  font-size: 18px;
  color: #2980b9;
  background-color: #f7f7f7;
  width: 100%;
  padding: 13px 13px 13px 20px;
  box-sizing: border-box;
  border: 3px solid rgba(0, 0, 0, 0);
}

input:focus {
  background: #fff;
  border: 3px solid #2980b9;
}

#container {
  width: 360px;
  background: #f7f7f7;
  margin: 100px auto;
  box-shadow: 0 0 3px rgba(0, 0, 0, 0.1);
}

.completed {
  color: gray;
  text-decoration: line-through;
}