body {
  font-family: Arial, sans-serif;
  text-align: center;
  margin-top: 50px;
}

input {
  padding: 10px;
  width: 200px;
}

button {
  padding: 10px 15px;
  margin-left: 5px;
  cursor: pointer;
}

ul {
  list-style: none;
  padding: 0;
  margin-top: 20px;
}

li {
  padding: 10px;
  border-bottom: 1px solid #ccc;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

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

li button.delete-btn {
  margin-left: 10px;
  background-color: red;
  color: white;
  border: none;
  cursor: pointer;
  padding: 3px 6px;
  border-radius: 3px;
}