* {
    box-sizing: border-box;
  }
  
  body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    background: #f4f4f4;
    color: #111;
  }
  
  button,
  input {
    font: inherit;
  }
  
  button {
    cursor: pointer;
  }
  
  /* APP */
  
  .app {
    width: 100%;
    max-width: 700px;
    margin: 0 auto;
    padding: 30px;
  }
  
  
  /* HEADER */
  
  .header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 40px;
  }
  
  .header h1 {
    margin: 0;
    font-size: 28px;
  }
  
  #progress {
    margin: 7px 0 0;
    color: #777;
    font-size: 14px;
  }
  
  
  /* SEARCH */
  
  .search {
    margin-bottom: 35px;
  }
  
  .search label {
    display: block;
    margin-bottom: 10px;
    font-size: 14px;
    font-weight: 600;
  }
  
  .search-row {
    display: flex;
    gap: 10px;
  }
  
  #order-search {
    width: 100%;
    min-width: 0;
    height: 50px;
  
    padding: 0 15px;
  
    border: 1px solid #ccc;
    border-radius: 10px;
  
    background: #fff;
  
    font-size: 18px;
  
    outline: none;
  }
  
  #order-search:focus {
    border-color: #111;
  }
  
  #search-button {
    height: 50px;
    padding: 0 24px;
  
    border: 0;
    border-radius: 10px;
  
    background: #111;
    color: #fff;
  
    font-weight: 600;
  }
  
  
  /* ORDERS */
  
  .orders {
    display: flex;
    flex-direction: column;
    gap: 12px;
  }
  
  .order-card {
    background: #fff;
    border-radius: 14px;
    padding: 18px 20px;
  }
  
  .order-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
  }
  
  .order-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  
    min-width: 90px;
    padding: 8px 14px;
  
    background: #111;
    color: #fff;
  
    border-radius: 9px;
  
    font-size: 25px;
    font-weight: 800;
    letter-spacing: 1px;
  }
  
  .shop-name {
    font-size: 11px;
    color: #999;
    font-weight: 400;
  }
  
  
  /* PRODUCT */
  
  .product {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
  
    padding: 9px 0;
  }
  
  .product + .product {
    border-top: 1px solid #eee;
  }
  
  .product-name {
    font-size: 19px;
    font-weight: 700;
    line-height: 1.25;
  }
  
  .product-info {
    flex-shrink: 0;
  
    font-size: 18px;
    font-weight: 700;
    color: #111;
  }
  
  
  /* UNKNOWN PRODUCT */
  
  .product.unknown {
    display: block;
  
    padding: 12px;
  
    border-radius: 8px;
  
    background: #f2f2f2;
  }
  
  .unknown-title {
    margin-bottom: 5px;
  
    font-size: 14px;
    font-weight: 700;
  }
  
  .unknown-sku {
    font-size: 12px;
    color: #666;
  }
  
  
  /* PAGINATION */
  
  .pagination {
    display: flex;
    justify-content: space-between;
    gap: 15px;
  
    margin-top: 30px;
  }
  
  .pagination button {
    min-width: 130px;
    height: 48px;
  
    padding: 0 20px;
  
    border: 1px solid #ccc;
    border-radius: 10px;
  
    background: #fff;
    color: #111;
  
    font-weight: 600;
  }
  
  .pagination button:disabled {
    opacity: 0.35;
    cursor: default;
  }
  
  #next-button {
    background: #111;
    border-color: #111;
    color: #fff;
  }
  
  
  /* PAGE SIZE */
  
  .page-size {
    margin-top: 35px;
    padding-top: 25px;
  
    border-top: 1px solid #ddd;
  
    text-align: center;
  }
  
  .page-size > span {
    display: block;
  
    margin-bottom: 12px;
  
    color: #777;
    font-size: 13px;
  }
  
  .page-size-buttons {
    display: flex;
    justify-content: center;
    gap: 8px;
  }
  
  .page-size-buttons button {
    width: 45px;
    height: 40px;
  
    border: 1px solid #ccc;
    border-radius: 8px;
  
    background: #fff;
    color: #111;
  }
  
  .page-size-buttons button.active {
    background: #111;
    border-color: #111;
    color: #fff;
  }
  
  
  /* MOBILE */
  
  @media (max-width: 600px) {
  
    .app {
      padding: 20px 15px;
    }
  
    .header {
      margin-bottom: 30px;
    }
  
    .header h1 {
      font-size: 24px;
    }
  
    .search-row {
      flex-direction: column;
    }
  
    #search-button {
      width: 100%;
    }
  
    .order-card {
      padding: 16px;
    }
  
    .order-number {
      font-size: 22px;
    }
  
    .product {
      align-items: flex-start;
    }
  
    .pagination button {
      flex: 1;
      min-width: 0;
    }
  }