* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: Arial, sans-serif;
}

body {
  background: #f0f2f5;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

.container {
  background: white;
  padding: 20px;
  border-radius: 12px;
  box-shadow: 0px 4px 10px rgba(0,0,0,0.1);
  width: 350px;
  text-align: center;
}

h1 {
  margin-bottom: 15px;
  color: #333;
}

.input-section {
  display: flex;
  gap: 10px;
}

#taskInput {
  flex: 1;
  padding: 10px;
  border: 1px solid #ddd;
  border-radius: 6px;
}

#addBtn {
  padding: 10px 15px;
  background: #4CAF50;
  border: none;
  color: white;
  border-radius: 6px;
  cursor: pointer;
  transition: 0.3s;
}

#addBtn:hover {
  background: #45a049;
}

#taskList {
  list-style: none;
  margin-top: 20px;
  text-align: left;
}

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

.task.completed {
  text-decoration: line-through;
  color: gray;
  background: #e8e8e8;
}

.deleteBtn {
  background: red;
  border: none;
  color: white;
  padding: 5px 8px;
  border-radius: 4px;
  cursor: pointer;
}