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

.container {
  width: 400px;
  background: white;
  padding: 20px;
  border-radius: 12px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.2);
}

h1 {
  text-align: center;
  color: #333;
}

.task-input {
  display: flex;
  margin-bottom: 15px;
}

.task-input input {
  flex: 1;
  padding: 10px;
  border: 1px solid #ccc;
  border-radius: 6px;
}

.task-input button {
  margin-left: 10px;
  padding: 10px 15px;
  background: #007BFF;
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
}

.task-input button:hover {
  background: #0056b3;
}

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

li {
  background: #f9f9f9;
  margin: 6px 0;
  padding: 10px;
  border-radius: 6px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

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

button.edit, button.delete {
  margin-left: 8px;
  padding: 5px 10px;
  border: none;
  border-radius: 6px;
  cursor: pointer;
}

button.edit { background: #ffc107; color: white; }
button.delete { background: #dc3545; color: white; }

button.edit:hover { background: #e0a800; }
button.delete:hover { background: #b02a37; }