styles.css

body {
    font-family:'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    justify-content: center;
    align-items: center;

  }

  .container {
    display: flex;
    gap: 25px;
    width: 80vw;
    height: 80vh;
    margin: 50px 50px;
    padding: 20px 20px;
  }
  h2{
    margin-left: 10px;
    margin-right: 10px;
   text-transform: uppercase;
  
  }
  p{
    margin-left: 10px;
    margin-right: 10px;
    font-size: 12px;
  }

  .left-pane {
    flex: 1;
    height: fit-content; 
    border-style:solid;
    border-color: burlywood;
    overflow-y: auto;
  }

  .right-pane {
    flex: 1;
    height: fit-content; 
    justify-content: center;
    align-items: center;
  }
  
  input[type="text"] {
   width: auto;
    padding: 10px;
    border: none;
    font-size: 35px;
    font-style: oblique;
    font-weight: bold;
  }
  #task-input:focus {
    outline: none;
  }
  .complete{
    text-decoration: line-through;
  }
 div.show-item{
    display: flex;
    align-items: center;
  
 }
 
  div.items{
    display: flex;
    justify-content: space-between;
    gap: 25px;
    border-bottom: 1px solid #ccc;
    padding: 6px;
    margin:2px 10px;
  }
  
  input[type="checkbox"]{
    margin-left: 10px;
    margin-right: 10px;
    padding: 10px;
  }