body {
      font-family: Arial, sans-serif;
      max-width: 500px;
      margin: 40px auto;
      padding: 20px;
    }

    h1 {
      text-align: center;
    }

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

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

    button {
      padding: 10px 15px;
      cursor: pointer;
    }

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

    li {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 10px;
      border: 1px solid #ddd;
      margin-bottom: 8px;
      border-radius: 5px;
    }

    .task {
      flex: 1;
      cursor: pointer;
    }

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

    .delete-btn {
      background: crimson;
      color: white;
      border: none;
      border-radius: 4px;
      padding: 5px 10px;
    }