body {
  font-family: 'Arial', sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  background-color: #f5f5f5;
}

#todo-list-app {
  background: white;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

#todo-input {
  padding: 10px;
  width: 200px;
  margin-right: 10px;
  border: 1px solid #ccc;
  border-radius: 4px;
}

#add-todo-btn {
  background-color: #007bff;
  color: white;
  border: none;
  padding: 10px 15px;
  border-radius: 4px;
  cursor: pointer;
}

#add-todo-btn:hover {
  background-color: #0056b3;
}

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

#todo-list li {
  padding: 10px;
  background-color: #f9f9f9;
  margin-bottom: 5px;
  border-radius: 4px;
}

/* Existing styles... */

.done {
  text-decoration: line-through;
  color: #6c757d;
}

.delete-btn,
.done-btn {
  margin-left: 10px;
  cursor: pointer;
}

.delete-btn {
  background-color: #dc3545;
  color: white;
  border: none;
  padding: 5px 10px;
  border-radius: 4px;
}

.done-btn {
  background-color: #28a745;
  color: white;
  border: none;
  padding: 5px 10px;
  border-radius: 4px;
}

.delete-btn:hover {
  background-color: #c82333;
}

.done-btn:hover {
  background-color: #218838;
}