todo.css

html {
  font-size: 16px;
}

body {
  font-size: 100%;
  font-family: 'Roboto', arial, sans-serif;
  background: url(background2.jpg) no-repeat center center fixed;
  background-size: cover;
}

.container {
  margin-top: 5rem;
  margin-right: auto;
  margin-left: auto;
  overflow: hidden;
  max-width: remy(420px);
  background: #fff;
  border-radius: $radius;
  box-shadow: 0 1px 3px rgba(0,0,0,.025), 0 3px 6px rgba(0,0,0,.065);
}

.input-group {
  height: 10em;
  display: flex;
  align-items: center;
  justify-content: center
}

.form {
  height: 30%;
  width: 40%;
  border: 0;
  text-align: center;
  font-size: 20px;
  background-color: rgba(255, 255, 255, 0.8);
}

.button {
  height: 30%;
  width: 12%;
  border: 0;
  color: #fff;
  background-color: rgba(189, 241, 134, 0.6);
}

.list {
  overflow: hidden;
  align-items: center;
  justify-content: center;
  list-style-type: none;
  padding-left: 21%;
  padding-right: 21%;
  overflow: hidden;
}

.item {
  padding-top: 0.75rem;
  padding-right: 0.75rem;
  padding-bottom: 0.75rem;
  padding-left: 0.75rem;
  width: 100%;
  cursor: default;
  background-color: rgba(255, 255, 255, 0.6);
  color: #0b1a31;
}

.remove {
  line-height: 1.45;
  color: gray;
  cursor: pointer;
  transition: color .25s ease-in-out;
  float: right;

  &:focus,
  &:hover {
    color: #e53935;
  }
}