body {
  font-family: Arial, sans-serif;
  text-align: center;
  background-color: #f4f4f4;
  margin-top: 100px;
}

.todo-container {
  background-color: white;
  padding: 20px;
  border-radius: 8px;
  display: inline-block;
  width: 300px;
}

input, button {
  padding: 10px;
  margin: 5px;
  font-size: 16px;
}

li {
  list-style: none;
  margin: 5px 0;
  padding: 8px;
  background: #f9f9f9;
  border-radius: 4px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

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

.action-buttons button {
  margin-left: 5px;
  cursor: pointer;
}

.complete-btn {
  background-color: #4CAF50;
  color: white;
  border: none;
  border-radius: 4px;
}

.edit-btn {
  background-color: #2196F3;
  color: white;
  border: none;
  border-radius: 4px;
}

.delete-btn {
  background-color: #f44336;
  color: white;
  border: none;
  border-radius: 4px;
}