body {
    font-family: Arial, sans-serif;
    max-width: 500px;
    margin: 0 auto;
    padding: 20px;
    background-color: #f4f4f4;
    display: flex;
    height: 100vh;
    justify-content: center;
    align-items: center;
  }
  .container {
    max-width: 500px;
    width: 100%;
    margin: auto;
    padding: 20px;
    background-color: white;
    border-radius: 20px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
  }
  h1 {
    text-align: center;
  }
  #todoInput {
    width: 70%;
    float: left;
    margin-left: 20px;
    padding: 10px;
    border-radius: 20px;
  }
  .addButton {
    background-color: rgb(252, 252, 0);
    color: rgb(2, 2, 2);
    font-weight: bold;
    border-radius: 20px;
    padding: 10px;
  }
  ul {
    list-style-type: none;
    padding: 0;
    cursor: pointer;
  }
  li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 20px;
  }
  ul li.checked .task-text {
    text-decoration: line-through;
  }
  .task-text {
    font-size: 16px;
    font-weight: bold;
  }
  .buttonClose {
    background-color: rgb(255, 0, 0);
    border-radius: 20px;
    padding: 5px;
    color: rgb(255, 255, 255);
  }
  .buttonComplete {
    background-color: green;
    border-radius: 20px;
    padding: 5px;
    color: rgb(255, 255, 255);
    margin-right: 5px;
  }
  .button-gap {
    display: flex;
  }