Code Css

  div.in-mobile>p {
    font-size : 16px;
  }
  
  div.pdp-fieldset__size-label {
    font-size : 24px;
  }
  
  #pdp-fit-assist {
    line-height : 20px !important;
    font-size : 18px !important;
  }
  
  li.description>p:nth-of-type(1)>strong,
  li.description>p:nth-of-type(2)>strong,
  li.description>p:nth-of-type(3)>strong,
  li.description>p:nth-of-type(4)>strong,
  li.description>p:nth-of-type(5)>strong {
    font-size : 24px;
  }

  div.inline-cart__items-container>div:nth-of-type(1)>div:nth-of-type(1)>h4,
  div.inline-cart__items-container>div:nth-of-type(2)>div:nth-of-type(1)>h4 {
    font-size : 18px;
    line-height : 20px;
  }

  div.inline-cart__items-container>div:nth-of-type(1)>div:nth-of-type(1)>h5,
  div.inline-cart__items-container>div:nth-of-type(2)>div:nth-of-type(1)>h5 {
    font-size : 16px;
  }

  div.inline-cart__items-container>div:nth-of-type(1)>div:nth-of-type(1)>div>div,
  div.inline-cart__items-container>div:nth-of-type(2)>div:nth-of-type(1)>div>div {
    font-size : 18px;
    font-weight : bold;
  }

  div.inline-cart__items-container>div:nth-of-type(1)>div:nth-of-type(2)>button,
  div.inline-cart__items-container>div:nth-of-type(2)>div:nth-of-type(2)>button {
    font-size : 18px;
  }

  a.inline-cart__btn {
    line-height : 30px;
  }
  
  div.inline-cart__total-amount-title {
    font-size : 22px;
  }
  
  div.inline-cart__total-amount {
    font-weight : bold;
    font-size : 22px;
  }
  
  div.inline-cart__footer-info {
    font-size : 18px;
  }
  
  h3.inline-cart__header {
    font-size : 20px;
  }
  
  #pdp--title>p>span {
    font-size : 26px;
    font-weight : bold;
    line-height : 30px;
  }
  
  #pdp--details>div:nth-of-type(2)>div {
    font-size : 18px;
  }
  
  #pdp--details>p {
    font-size : 16px;
  }
  
  div.title-price>p>span {
    font-weight : bold !important;
    font-size : 26px !important;
    line-height : 30px !important;
  }

  div.inline-cart__items-container>div:nth-of-type(2)>div:nth-of-type(2)>div>input,
  div.inline-cart__items-container>div:nth-of-type(1)>div:nth-of-type(2)>div>input  {
    font-weight : bold;
  }

  
  fieldset.pdp-fieldset>div:nth-of-type(1)>a:nth-of-type(1),
  fieldset.pdp-fieldset>div:nth-of-type(1)>a:nth-of-type(2),
  fieldset.pdp-fieldset>div:nth-of-type(1)>a:nth-of-type(5),
  fieldset.pdp-fieldset>div:nth-of-type(1)>a:nth-of-type(6),
  fieldset.pdp-fieldset>div:nth-of-type(1)>a:nth-of-type(7),
  fieldset.pdp-fieldset>div:nth-of-type(1)>a:nth-of-type(4),
  fieldset.pdp-fieldset>div:nth-of-type(1)>a:nth-of-type(3){
    font-weight : bold !important;
  }



/********Mobile Screen*******/

  @media screen and (max-width: 500px) {
    div.pdp-fieldset__size-label{
      font-size: 20px;
    }

    #pdp-fit-assist {
      font-size : 16px !important;
    }

    li.description>p:nth-of-type(1)>strong,
    li.description>p:nth-of-type(2)>strong,
    li.description>p:nth-of-type(3)>strong,
    li.description>p:nth-of-type(4)>strong,
    li.description>p:nth-of-type(5)>strong {
      font-size : 18px!important;
    }

    a.inline-cart__btn {
      line-height: 35px !important;
    }

   div.inline-cart__total-amount-title {
      font-size : 19px !important;
    }

   div.inline-cart__total-amount {
     font-weight : bold;
     font-size : 19px !important;
   }

   div.title-price>p>span {
    font-size : 24px !important;
    line-height : 26px !important;
  }
}