style.css

html {
    box-sizing: border-box;
  }
  
  *, *::before, *::after {
    box-sizing: inherit;
    margin: 0;
    padding: 0;
  }
  
  body {
   font-family:
   -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen-Sans,
    Ubuntu, Cantarell, 'Helvetica Neue', sans-serif;
   line-height: 1.4;
  }
  
  .container {
    width: 100%;
    max-width: 500px;
    margin: 0 auto;
    padding-left: 10px;
    padding-right: 10px;
    color: #333;
    height: 90vh;
    margin-top: 5vh;
    margin-bottom: 5vh;
    overflow-y: auto;
  }
  
  .app-title {
    text-align: center;
    margin-bottom: 20px;
    font-size: 80px;
    opacity: 0.5;
  }
  
  svg {
    width: 64px;
    height: 64px;
  }
  
  .todo-list {
    list-style: none;
    margin-bottom: 20px;
  }
  
  .todo-item {
    margin-bottom: 10px;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
  }
  
  .todo-item span {
    flex-grow: 1;
    margin-left: 10px;
    margin-right: 10px;
    font-size: 22px;
  }
  
  .done span {
    text-decoration: line-through;
  }
  
  input[type="checkbox"] {
    display: none;
  }
  
  .tick {
    width: 30px;
    height: 30px;
    border: 3px solid #333;
    border-radius: 50%;
    display: inline-flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
  }
  
  .tick::before {
    content: '✓';
    font-size: 20px;
    display: none;
  }
  
  .done .tick::before {
    display: inline;
  }
  
  .delete-todo {
    border: none;
    background-color: transparent;
    outline: none;
    cursor: pointer;
  }
  
  .delete-todo svg {
    width: 30px;
    height: 30px;
    pointer-events: none;
  }
  
  form {
    width: 100%;
    display: flex;
    justify-content: space-between;
  }
  
  input[type="text"] {
    width: 100%;
    padding: 10px;
    border-radius: 4px;
    border: 3px solid #333;
  }
  
  /* Add this below all the other styles */
  
  .empty-state {
    flex-direction: column;
    align-items: center;
    justify-content: center;
    display: none;
  }
  
  .checklist-icon {
    margin-bottom: 20px;
  }
  
  .empty-state__title, .empty-state__description {
    margin-bottom: 20px;
  }
  
  /* Add this below the other styles */
  .todo-list:empty {
    display: none;
  }
  
  .todo-list:empty + .empty-state {
    display: flex;
  }