body {
  font-family: Arial, sans-serif;
  background-color: #f4f7fb;
  margin: 0;
  padding: 0;
}

.container {
  max-width: 600px;
  margin: 50px auto;
  background: white;
  padding: 20px;
  border-radius: 10px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

h1 {
  margin-top: 0;
  text-align: center;
}

.subtitle {
  text-align: center;
  color: #666;
  margin-bottom: 20px;
}

.task-input {
  display: flex;
  gap: 10px;
  margin-bottom: 20px;
}

.task-input input {
  flex: 1;
  padding: 10px;
  font-size: 16px;
}

.task-input button {
  padding: 10px 15px;
  font-size: 16px;
  cursor: pointer;
}

#taskList {
  list-style: none;
  padding: 0;
}

#taskList li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #eef2f7;
  margin-bottom: 10px;
  padding: 10px;
  border-radius: 6px;
}

.task-text.completed {
  text-decoration: line-through;
  color: #888;
}

.task-buttons {
  display: flex;
  gap: 8px;
}

.task-buttons button {
  cursor: pointer;
  padding: 5px 10px;
}