style.css

body {
  color: #484848;
  font-family: "Lato", sans-serif;
  padding: 0.45em 2.65em 3em;
  line-height: 1.5;
}
h1 {
  color: #508abc;
  margin-bottom: 0;
}
h1 + p {
  font-size: 1.08em;
  color: #508abc;
  margin-top: 0.5em;
  margin-bottom: 2.65em;
  padding-bottom: 1.325em;
  border-bottom: 5px dotted;
}
ul {
  padding-left: 0;
  list-style: none;
  width: 100%;
}
li {
  padding: 0.45em 0.5em;
  margin-bottom: 0.35em;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
  max-width: 500px;
}
input,
button {
  font-size: 0.85em;
  padding: 0.65em 1em;
  border-radius: 0.3em;
  outline: 0;
}
input {
  border: 1px solid #dcdcdc;
  margin-right: 1em;
}

button {
  color: white;
  background: dodgerblue;
  border: solid 1px;
  border-color: rgba(0, 0, 0, 0.1);
  cursor: pointer;
}

#delete {
  margin-left: auto;
  cursor: pointer;
  background: #52bab3;
  position: absolute;
  right: 0;
  margin-right: 2em;
  text-decoration: none !important;
}

.done {
  text-decoration: line-through;
}

.container {
  display: flex;
}