styles.css

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: #f8f9fa;
  margin: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

.container {
  width: 80%;
  max-width: 600px;
  padding: 20px;
  background-color: #fff;
  border-radius: 10px;
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
}

h1 {
  text-align: center;
  margin-top: 0;
  color: #333;
  font-size: 2.5rem;
  margin-bottom: 20px;
}

.todo-wrapper {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

input[type="text"] {
  flex: 1;
  padding: 15px;
  border: 2px solid #ddd;
  border-radius: 30px;
  margin-right: 10px;
  font-size: 1.1rem;
  outline: none;
  transition: border-color 0.3s ease;
}

input[type="text"]::placeholder {
  color: #aaa;
}

input[type="text"]:focus {
  border-color: #4CAF50;
}

button {
  padding: 10px 20px;
  background-color: #4CAF50;
  color: #fff;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  font-size: 1rem;
  transition: background-color 0.3s ease;
}

button:hover {
  background-color: #45a049;
}

.add-task-btn {
  background-color: #007bff;
}

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

.clear-all-btn {
  background-color: #dc3545;
}

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

ul {
  list-style-type: none;
  padding: 0;
}

li {
  padding: 15px;
  background-color: #f9f9f9;
  border-radius: 10px;
  margin-bottom: 10px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

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

footer {
  text-align: center;
  margin-top: 20px;
  color: #888;
}