main.css

body {
    background: #eff8ff;
    height: 100vh;
    width: 100vw;
    font-family: system-ui, BlinkMacSystemFont, -apple-system, Segoe UI, Roboto,
      Oxygen, Ubuntu, Cantarell, Fira Sans, Droid Sans, Helvetica Neue, sans-serif;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0;
    padding: 0;
  }
  
  .counter {
    font-size: 0.8rem;
    padding-left: 10px;
    padding-right: 10px;
  }
  
  #shopping-list {
    background: #fff;
    padding: 2rem;
    margin: 1rem;
    border-radius: 3px;
    box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.12), 0 2px 4px 0 rgba(0, 0, 0, 0.08);
    width: 95%;
    max-width: 900px;
  }
  
  h1 {
    color: #3d4852;
  }
  
  ul {
    list-style: none;
    padding: 0;
  }
  
  a {
    color: #6cb2eb;
    font-size: 1.25rem;
    transition: all 0.1s ease-in;
    margin-top: 0.5rem;
    display: block;
  }
  
  a:hover {
    color: #3490dc;
  }
  
  li,
  p {
    display: flex;
    align-items: center;
    line-height: 1.75;
    letter-spacing: 0.5px;
    color: #3d4852;
    font-size: 1.25rem;
    cursor: pointer;
    transition: all 0.1s ease-in;
  }
  
  li:hover {
    color: #22292f;
  }
  
  li input {
    margin: 0 0.5rem 0;
  }
  
  #shopping-list > input,
  #shopping-list > select {
    width: 100%;
    border-radius: 3px;
    box-shadow: 0 2px 4px 0 rgba(0, 0, 0, 0.1);
    border: 1px solid #f1f5f8;
    color: #606f7b;
    padding: 0.5rem 0.75rem;
    box-sizing: border-box;
    font-size: 1rem;
    letter-spacing: 0.5px;
    margin: 0.5rem 0;
  }
  
  .add-item-form,
  .header {
    display: flex;
    align-items: center;
    justify-content: space-between;
  }
  
  .add-item-form input {
    width: 70%;
    border-radius: 3px;
    box-shadow: 0 2px 4px 0 rgba(0, 0, 0, 0.1);
    border: 1px solid #f1f5f8;
    color: #606f7b;
    padding: 0.5rem 0.75rem;
    box-sizing: border-box;
    font-size: 1rem;
    letter-spacing: 0.5px;
    margin: 0.5rem 0;
  }

  .add-item-form input[type='checkbox']{
    width: auto !important;
    background-color: transparent;
    border: 0;
    cursor: pointer;
  }

  label{
    cursor: pointer;
  }
  
  .btn {
    border: none;
    border-radius: 3px;
    margin: auto 0;
    padding: 0.5rem 0.75rem;
    flex-shrink: 0;
    cursor: pointer;
    font-size: 0.9rem;
    letter-spacing: 0.5px;
    transition: all 0.1s ease-in;
  }
  
  .btn[disabled] {
    background: #8795a1;
  }
  
  .btn[disabled]:hover {
    background: #606f7b;
  }
  
  .btn-primary {
    background: #6cb2eb;
    color: #fff;
  }
  
  .btn-primary:hover {
    background: #3490dc;
  }
  
  .btn-cancel {
    background: #ef5753;
    color: #fff;
  }
  
  .btn-cancel:hover {
    background: #e3342f;
    color: #fff;
  }
  
  .strikeout {
    text-decoration: line-through;
    color: #b8c2cc;
  }
  
  .strikeout:hover {
    color: #8795a1;
  }
  
  .priority {
    color: #de751f;
  }