body {
  font-family: Arial, sans-serif;
  background: #f3f3f3;
  display: flex;
  justify-content: center;
  padding-top: 50px;
}

.container {
  background: #fff;
  padding: 25px;
  border-radius: 10px;
  width: 350px;
  box-shadow: 0px 0px 10px rgba(0,0,0,0.1);
}

h1 {
  text-align: center;
}

.input-area {
  display: flex;
  margin-bottom: 20px;
}

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

#add-btn {
  margin-left: 10px;
  padding: 10px 15px;
  background: #4caf50;
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
}

#add-btn:hover {
  background: #45a049;
}

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

.task {
  background: #fafafa;
  padding: 12px;
  margin-bottom: 10px;
  border-radius: 6px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-left: 4px solid #4caf50;
}

.task.completed {
  text-decoration: line-through;
  opacity: 0.6;
}

.delete-btn {
  background: #e74c3c;
  border: none;
  color: white;
  padding: 6px 10px;
  border-radius: 6px;
  cursor: pointer;
}

.delete-btn:hover {
  background: #c0392b;
}