body {
  font-family: sans-serif;
  margin: 2em;
  background-color: #f5f5f5;
}

h1 {
  color: #333;
}

a {
  text-decoration: none;
  color: #0066cc;
}

.checklist-section {
  margin-top: 0.5em;
  padding-top:10px;
  padding-bottom:3px;
  padding-left:10px;
  padding-right:10px;
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 0 5px rgba(0,0,0,0.1);
}

.checklist-section h2 {
  margin-top: 0;
}

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

ul label {
  cursor:pointer
}

input[type="checkbox"]:checked + span {
  text-decoration: line-through;
  color: #5fc400;
}

.completed {
  text-decoration: line-through;
  color: #5fc400;
}