body {
  font-family: Arial, sans-serif;
  margin: 40px;
}

li {
  padding: 10px;
  margin-bottom: 8px;
  border: 1px solid #ccc;
  display: flex;
  justify-content: space-between;
}

.todo { background: #f9f9f9; }
.in_progress { background: #fff3cd; }
.done { background: #d4edda; }

button {
  margin-left: 10px;
}