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HTML 

              
                <!-- about -->
<div class="about">
   <a class="bg_links social portfolio" href="https://www.rafaelalucas.com/dailyui" target="_blank">
      <span class="icon"></span>
   </a>
   <a class="bg_links social dribbble" href="https://dribbble.com/rafaelalucas" target="_blank">
      <span class="icon"></span>
   </a>
   <a class="bg_links social linkedin" href="https://www.linkedin.com/in/rafaelalucas/" target="_blank">
      <span class="icon"></span>
   </a>
   <a class="bg_links logo"></a>
</div>
<!-- end about -->

<div class="wrapper">
        <nav>
            <div class="mainLogo">Logo</div>
            <div class="menu">
                <div class="menuLinks">
                    <a href="" class="menuLink">About</a>
                    <a href="" class="menuLink">Store</a>
                    <a href="" class="menuLink">Contacts</a>
                </div>

                <div class="shoppingCart">
                    <div class="shoppingIcon">
                        <img src="https://rafaelalucas.com/dailyui/12/assets/shopping-cart.svg" alt="">
                        <span class="itemNumber">0</span>
                    </div>
                    <div class="shoppingMenu">
                        <p class="shoppingTitle">Your Shopping Cart</p>
                        <div class="productResume">
                            <img src="https://rafaelalucas.com/dailyui/12/assets/img01.png" alt="" class="shoppingThumb">
                            <article>
                                <p class="shoppingProduct">Nike Air Max 200</p>
                                <p class="shoppingQuantity">0</p>
                                <p class="shoppingTotal"></p>
                            </article>
                        </div>
                        <div class="shoppingBtn">
                            <a class="link emptyCart"> <img src="https://rafaelalucas.com/dailyui/12/assets/trash.svg" alt=""> Empty Shopping Cart</a>
                            <button class="btn">Finish Shopping</button>
                        </div>

                    </div>
                </div>

                <i class="iconMenu">
                    <img src="https://rafaelalucas.com/dailyui/12/assets/menu.svg" alt="">
                </i>
            </div>
        </nav>

        <div class="content">

            <section class="left">
                <div class="swiper-container galleryMain ">
                    <div class="swiper-wrapper">
                    </div>

                </div>
                <!-- Add Arrows -->
                <div class="sliderNavigation">
                    <div class="swiper-button-prev"></div>
                    <div class="swiper-pagination"></div>
                    <div class="swiper-button-next"></div>
                </div>
            </section>

            <section class="right">
                <div class="rightContent">
                    <div class="model">
                        <p class="modelTitle">Nike Air Max 200</p>
                        <p class="modelDesc">AQ2568-005</p>
                    </div>


                    <div class="price">
                        <p class="priceFinal"></p>
                        <p class="priceOriginal"></p>
                    </div>

                    <div class="specs">
                        <div class="size">
                            <h3 class="subtitle">Size</h3>
                            <div class="dropdown">
                                <div class="form dropContent">
                                    <p class="sizeNumber">40</p>
                                    <i class="icon arrowDrop">
                                        <img src="https://rafaelalucas.com/dailyui/12/assets/arrow-down.svg" alt="">
                                    </i>
                                </div>
                                <div class="dropOpen">
                                    <ul class="dropItems">
                                        <li class="dropItem">38</li>
                                        <li class="dropItem">39</li>
                                        <li class="dropItem">40</li>
                                        <li class="dropItem">41</li>
                                        <li class="dropItem">42</li>
                                        <li class="dropItem">43</li>
                                        <li class="dropItem">44</li>
                                        <li class="dropItem">45</li>
                                    </ul>
                                </div>
                            </div>
                        </div>

                        <div class="quantity">
                            <h3 class="subtitle">Quantity</h3>
                            <div class="form quantityCounter">
                                <input class="inputQuantity" onKeyDown="return false" type="number" value="1" />

                                <i class="icon btnQuantity minus">
                                    <img src="https://rafaelalucas.com/dailyui/12/assets/minus.svg" alt="">
                                </i>
                                <i class="icon btnQuantity plus">
                                    <img src="https://rafaelalucas.com/dailyui/12/assets/plus.svg" alt="">
                                </i>
                            </div>

                            <p class="error">We only have 5 items in stock.</p>
                        </div>
                    </div>
                    <div class="swiper-container galleryThumbs">
                        <div class="swiper-wrapper">
                        </div>
                    </div>
                    <div class="btnContainer">
                        <button class="btn add">
                            <img src="https://rafaelalucas.com/dailyui/12/assets/shopping-cart-w.svg" alt="">
                            add to cart</button>
                    </div>

                </div>
            </section>
            <!-- Swiper -->

        </div>

    </div>
!

CSS 

              
                .about {
   $cubic: cubic-bezier(0.64, 0.01, 0.07, 1.65);
   $transition: 0.6s $cubic;
   $size: 40px;
   position: fixed;
   z-index: 10;
   bottom: 10px;
   right: 10px;
   width: $size;
   height: $size;
   display: flex;
   justify-content: flex-end;
   align-items: flex-end;
   transition: all 0.2s ease;

   .bg_links {
      width: $size;
      height: $size;
      border-radius: 100%;
      display: flex;
      justify-content: center;
      align-items: center;
      background-color: rgba(#000000, 0.2);
      border-radius: 100%;
      backdrop-filter: blur(5px);
      position: absolute;
   }

   .logo {
      width: $size;
      height: $size;
      z-index: 9;
      background-image: url(https://rafaelavlucas.github.io/assets/codepen/logo_white.svg);
      background-size: 50%;
      background-repeat: no-repeat;
      background-position: 10px 7px;
      opacity: 0.9;
      transition: all 1s 0.2s ease;
      bottom: 0;
      right: 0;
   }

   .social {
      opacity: 0;
      right: 0;
      bottom: 0;

      .icon {
         width: 100%;
         height: 100%;
         background-size: 20px;
         background-repeat: no-repeat;
         background-position: center;
         background-color: transparent;
         display: flex;
         transition: all 0.2s ease, background-color 0.4s ease;
         opacity: 0;
         border-radius: 100%;
      }

      &.portfolio {
         transition: all 0.8s ease;

         .icon {
            background-image: url(https://rafaelavlucas.github.io/assets/codepen/link.svg);
         }
      }

      &.dribbble {
         transition: all 0.3s ease;
         .icon {
            background-image: url(https://rafaelavlucas.github.io/assets/codepen/dribbble.svg);
         }
      }

      &.linkedin {
         transition: all 0.8s ease;
         .icon {
            background-image: url(https://rafaelavlucas.github.io/assets/codepen/linkedin.svg);
         }
      }
   }

   &:hover {
      width: 105px;
      height: 105px;
      transition: all $transition;

      .logo {
         opacity: 1;
         transition: all 0.6s ease;
      }

      .social {
         opacity: 1;

         .icon {
            opacity: 0.9;
         }

         &:hover {
            background-size: 28px;
            .icon {
               background-size: 65%;
               opacity: 1;
            }
         }

         &.portfolio {
            right: 0;
            bottom: calc(100% - 40px);
            transition: all 0.3s 0s $cubic;
            .icon {
               &:hover {
                  background-color: #698fb7;
               }
            }
         }

         &.dribbble {
            bottom: 45%;
            right: 45%;
            transition: all 0.3s 0.15s $cubic;
            .icon {
               &:hover {
                  background-color: #ea4c89;
               }
            }
         }

         &.linkedin {
            bottom: 0;
            right: calc(100% - 40px);
            transition: all 0.3s 0.25s $cubic;
            .icon {
               &:hover {
                  background-color: #0077b5;
               }
            }
         }
      }
   }
}

@import url("https://fonts.googleapis.com/css?family=Barlow+Condensed:200,300,400,500,600,700,800,900|Barlow:200,300,400,500,600,700,800,900&display=swap");
 
$font-01: "Barlow",
sans-serif;
$font-02: "Barlow Condensed",
sans-serif;

$m-01: #FD6561;

$neu-01: #363636;
$neu-02: #5A5A5A;
$neu-03: #909090;
$neu-04: #979797;
$neu-05: #BDBDBD;
$neu-06: #F5F5F5;


$cubic: cubic-bezier(0.51, -0.12, 0.25, 1.15);

@mixin lg {
    @media screen and (max-width: 1919px) {
        @content;
    }
}

@mixin md {
    @media screen and (max-width: 1023px) {
        @content;
    }
}

@mixin sm {
    @media screen and (max-width: 799px) {
        @content;
    }
}

@mixin xs {
    @media screen and (max-width: 512px) {
        @content;
    }
}


* {
    margin: 0;
    padding: 0;
    list-style: none;
    border: 0;
    -webkit-tap-highlight-color: transparent;
    text-decoration: none;
    color: inherit;
    box-sizing: border-box;

    &:focus {
        outline: 0;
    }

    input::-webkit-outer-spin-button,
    input::-webkit-inner-spin-button {
        -webkit-appearance: none;
        margin: 0;
    }
}

body {
    background-color: #e1e1e1;
    font-family: $font-01;
    font-weight: normal;
    transition: all 0.4s ease;

    @include sm {
        background-color: white;
    }
}

.logo {
    position: fixed;
    z-index: 5;
    bottom: 10px;
    right: 10px;
    width: 40px;
    height: 40px;
    border-radius: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    background: rgba(0, 0, 0, 0.1);
    border-radius: 100%;
    backdrop-filter: blur(5px);

    img {
        width: 55%;
        height: 55%;
        transform: translateY(-1px);
        opacity: 0.8;
    }

    @include sm {
        display: none;
    }
}

.wrapper {
    width: 100%;
    font-family: $font-01;
    user-select: none;
    letter-spacing: 0.8px;
    margin: 0 auto;

    .btnContainer {
        width: 100%;
        height: auto;
        position: relative;
        z-index: 3;

        &.fixedBtn {
            @include sm {
                position: fixed;
                bottom: 0;
                left: 0;
                padding: 20px 5%;

                &:before {
                    content: '';
                    position: fixed;
                    width: 100vw;
                    height: 110px;
                    background: linear-gradient(0deg, white 60%, transparent 90%);
                    z-index: -2;
                    display: none;
                    left: 0;
                    bottom: 0;

                    @include sm {
                        display: block;
                    }
                }

                .btn {
                    max-width: 400px;
                    margin: 0 auto;
                }
            }
        }
    }

    .btn {
        background: $m-01;
        box-shadow: 0px 10px 20px -5px rgba($m-01, 0.4);
        padding: 18px 50px;
        font-size: 18px;
        line-height: 22px;
        text-align: center;
        text-transform: uppercase;
        border-radius: 6px;
        color: white;
        font-weight: 600;
        letter-spacing: 0.5px;
        font-family: $font-01;
        transition: transform 0.2s ease, box-shadow 0.2s ease;
        cursor: pointer;
        display: flex;
        justify-content: center;
        align-items: center;

        img {
            margin-right: 10px;
            transform: translateX(-6px);
        }

        &:hover {
            transform: translateY(3px);
            box-shadow: 0px 2px 10px -5px rgba($m-01, 0.4);

            @include sm {
                transform: translateY(0px);
            }
        }

        @include sm {
            width: 100%;
        }
    }

    nav {
        background-color: rgba($neu-03, 0.1);
        display: flex;
        position: absolute;
        width: 100%;
        height: 140px;
        z-index: 2;
        transition: all 0.4s ease;

        &.fixed {
            background-color: rgba($neu-03, 0.1);
            box-shadow: 00;

            @include sm {
                background-color: rgba(white, 0.9);
                box-shadow: 0px 0px 20px rgba(black, 0.2);
            }
        }

        @include sm {
            height: 60px;
            position: fixed;
            justify-content: space-between;
        }

        .mainLogo {
            width: 40%;
            display: flex;
            align-items: center;
            padding: 0 60px;
            font-size: 28px;
            color: $m-01;
            font-weight: 800;

            @include sm {
                width: auto;
                padding: 0 5vw;
                font-size: 20px;
            }
        }

        .menu {
            width: 60%;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 0 60px 0 5vw;

            @include sm {
                width: auto;
                padding: 0 5vw;
            }

            .menuLinks {
                width: calc(100% - 48px);

                @include sm {
                    display: none;
                }

                .menuLink {
                    font-weight: 800;
                    font-size: 20px;
                    line-height: 24px;
                    color: $neu-04;
                    position: relative;
                    margin-right: 10%;
                    transition: all 0.3s ease;

                    &:last-of-type {
                        margin-right: 0;
                    }

                    &:before {
                        content: '';
                        position: absolute;
                        background-color: $neu-05;
                        width: 6px;
                        height: 6px;
                        border-radius: 6px;
                        bottom: -10px;
                        transition: all 0.3s ease;
                    }

                    &:hover {
                        color: $m-01;

                        &:before {
                            background-color: $m-01;
                            width: 100%;
                            left: calc(100% - 100%);
                        }
                    }
                }
            }
        }

        .shoppingCart {
            z-index: 6;

            .shoppingIcon {
                width: 48px;
                height: 48px;
                background-color: white;
                display: flex;
                justify-content: center;
                align-items: center;
                position: relative;
                border-radius: 100%;
                cursor: pointer;

                @include sm {
                    background-color: transparent;
                }
            }

            .itemNumber {
                width: 16px;
                height: 16px;
                display: none;
                justify-content: center;
                align-items: center;
                background-color: $m-01;
                border-radius: 100%;
                font-size: 10px;
                color: white;
                font-weight: bold;
                position: absolute;
                top: -2px;
                right: -2px;
                padding-left: 1px;
                transform: translate(0, 0);

                @include sm {
                    top: 0px;
                    right: 0px;
                }

                &.addItem {
                    display: flex;
                    animation: addItem 0.4s ease;

                    @keyframes addItem {

                        0% {
                            opacity: 0;
                            transform: translate(-50px, 100px);
                        }

                        80% {
                            width: 20px;
                            height: 20px;
                            opacity: 1;
                            transform: translate(0%, 0%);
                        }

                        100% {
                            width: 16px;
                            height: 16px;
                        }
                    }
                }
            }

            .shoppingMenu {
                width: 300px;
                background-color: white;
                box-shadow: 0px 30px 50px -20px rgba($neu-02, 0.3);
                position: absolute;
                top: 120px;
                right: 40px;
                border-radius: 10px;
                padding: 20px;
                display: flex;
                justify-content: center;
                align-items: center;
                flex-direction: column;
                visibility: hidden;
                opacity: 0;
                transition: all 0.4s ease;
                transform: translateY(50px);

                @include sm {
                    top: 80px;
                    right: 3%;
                }

                &:before {
                    content: '';
                    position: absolute;
                    background-color: white;
                    width: 30px;
                    height: 30px;
                    border-radius: 3px;
                    top: -8px;
                    right: 30px;
                    transform: rotate(45deg);

                    @include sm {
                        right: 76px;
                    }
                }

                .shoppingTitle {
                    font-size: 20px;
                    font-weight: 600;
                    color: $m-01;
                    margin: 10px 0 30px 0;
                }

                .productResume {
                    display: flex;
                    align-items: center;

                    .shoppingThumb {
                        width: 80px;
                        height: 80px;
                        margin-right: 20px;
                        border: 2px solid $neu-06;
                        padding: 5px;
                        border-radius: 4px;
                    }

                    .shoppingProduct {
                        color: $neu-04;
                        font-size: 16px;
                        font-weight: 500;
                        margin-bottom: 5px;
                    }

                    .shoppingQuantity {
                        color: $m-01;
                        font-weight: 600;
                        font-size: 18px;
                    }
                }

                .shoppingBtn {
                    display: flex;
                    justify-content: center;
                    align-items: center;
                    flex-direction: column;
                }

                .btn {
                    width: 100%;
                }

                .link {
                    margin: 50px 0 20px 0;
                    text-transform: uppercase;
                    font-weight: 500;
                    color: $neu-04;
                    font-size: 14px;
                    transition: all 0.2s ease;
                    display: flex;
                    align-items: center;
                    cursor: pointer;

                    img {
                        width: 20px;
                        height: 20px;
                        margin-right: 10px;
                        opacity: 0.3;
                        transition: all 0.2s ease;
                    }

                    &:hover {
                        color: $neu-02;

                        img {
                            opacity: 0.5;
                        }
                    }
                }

                &.openShopping {
                    visibility: visible;
                    opacity: 1;
                    transform: translateY(0);
                }
            }
        }

        .iconMenu {
            width: 48px;
            height: 48px;
            display: none;
            justify-content: center;
            align-items: center;
            margin-left: 10px;
            cursor: pointer;

            @include sm {
                display: flex;
            }
        }
    }

    .content {
        display: grid;
        grid-template-columns: 40% 60%;
        justify-content: center;
        align-items: center;
        width: 100%;
        margin: 0 auto;
        min-height: 800px;
        height: 100%;
        transition: all 0.4s ease;

        @include md {
            height: auto;
            min-height: auto;
        }

        @include sm {
            align-items: flex-start;
            grid-template-columns: 1fr;
            grid-template-rows: repeat(2, auto);
        }

        .left,
        .right {
            width: 100%;
            height: 100%;

            @include sm {
                height: auto;
            }
        }

        // Left Side - Main Slider

        .left {
            padding-top: 140px;
            background-color: $neu-01;
            position: relative;

            @include sm {
                padding: 60px 0px;
            }

            .sliderNavigation {
                width: fit-content;
                margin: 0 auto;
                left: 50%;
                transform: translateX(-50%);
                height: 40px;
                display: flex;
                justify-content: space-around;
                align-items: center;
                position: absolute;
                bottom: 40px;

                @include sm {
                    bottom: 20px;
                }

                .swiper-pagination {
                    position: initial;
                    margin: 0 20px;
                    z-index: 2;

                    .swiper-pagination-bullet {
                        width: 10px;
                        height: 10px;
                        border: 1px solid white;
                        background-color: transparent;
                        margin: 0 10px;
                        border-radius: 10px;
                        transition: all 0.4s ease;
                        opacity: 1;
                    }

                    .swiper-pagination-bullet-active {
                        width: 20px;
                        background-color: $m-01;
                        border: 1px solid $m-01;
                    }
                }

                .swiper-button-next,
                .swiper-button-prev {
                    margin: 0;
                    top: initial;
                    left: initial;
                    right: initial;
                    position: initial;
                    background-repeat: repeat;
                    background-position: center;
                    transition: all 0.2s ease;

                    @include sm {
                        display: none;
                    }
                }

                .swiper-button-next {
                    background-image: url(https://rafaelalucas.com/dailyui/12//assets/arrow-next.svg);

                    &:hover {
                        transform: translateX(5px);
                    }
                }

                .swiper-button-prev {
                    background-image: url(https://rafaelalucas.com/dailyui/12//assets/arrow-prev.svg);

                    &:hover {
                        transform: translateX(-5px);
                    }
                }
            }
        }

        // Right Side - Product Info
        .right {
            background-color: white;
            padding: 0px 60px 40px 15%;

            @include sm {
                height: auto;
                padding: 0px 5vw;
                padding-bottom: 100px;
            }

            .subtitle {
                color: $neu-02;
                font-weight: 600;
                font-size: 16px;
            }

            // Details

            .rightContent {
                max-width: 600px;
                margin-top: 220px;

                @include sm {
                    max-width: 400px;
                    margin: auto;
                    margin-top: 60px;
                }

                // Product Name
                .model {
                    margin-bottom: 40px;

                    .modelTitle {
                        color: $m-01;
                        font-weight: 800;
                        font-size: 36px;
                        margin-bottom: 10px;

                        @include sm {
                            font-size: 28px;
                        }
                    }

                    .modelDesc {
                        font-size: 18px;
                        color: $neu-02;
                    }
                }

                // Product Price
                .price {
                    display: flex;
                    align-items: center;
                    margin-bottom: 40px;
                    transition: all 0.4s ease;

                    .priceFinal {
                        font-weight: bold;
                        font-size: 28px;
                        color: $neu-02;
                        margin-right: 10px;
                        transition: all 0.4s ease;

                        &.anime {
                            animation: price 0.4s ease;

                            @keyframes price {
                                0% {
                                    transform: scale(1);
                                }

                                50% {
                                    transform: scale(1.2);
                                }

                                100% {
                                    transform: scale(1);
                                }
                            }
                        }

                        @include sm {
                            font-size: 24px;
                        }
                    }

                    .priceOriginal {
                        text-decoration: line-through;
                        color: $neu-05;
                        transition: all 0.4s ease;
                    }
                }

                // Product Specs
                .specs {
                    display: flex;
                    margin-bottom: 60px;

                    @include sm {
                        margin-bottom: 60px;
                    }

                    .form {
                        background-color: $neu-06;
                        border-radius: 4px;
                        min-height: 36px;
                        padding: 4px;
                        color: $neu-02;
                        font-size: 14px;
                        margin-top: 15px;
                        transition: all 0.4s ease;
                    }

                    .icon {
                        width: 28px;
                        height: 28px;
                        display: flex;
                        justify-content: center;
                        align-items: center;
                        background-color: white;
                        border-radius: 2px;
                        cursor: pointer;
                        transition: all 0.4s ease;

                        img {
                            width: 16px;
                            height: 16px;
                            transition: all 0.1s ease-in-out;
                        }

                        &:hover {
                            background-color: $neu-06;

                            img {
                                transform: scale(1.4);

                                @include sm {
                                    transform: scale(1);
                                }
                            }

                            @include sm {
                                background-color: white;
                            }
                        }
                    }

                    .size {

                        .dropdown {
                            position: relative;
                            z-index: 2;

                            .dropContent {
                                display: flex;

                                .sizeNumber {
                                    display: flex;
                                    justify-content: center;
                                    align-items: center;
                                    width: 28px;
                                    height: 28px;
                                    margin: 0 8px 0px 4px;
                                }

                                .arrowDrop {
                                    width: 28px;
                                    height: 28px;
                                    display: flex;
                                    justify-content: center;
                                    align-items: center;
                                    border-radius: 2px;

                                    img {
                                        transition: all 0.3s ease;
                                    }
                                }
                            }

                            .dropOpen {
                                width: 100%;
                                display: flex;
                                visibility: hidden;
                                flex-direction: column;
                                position: absolute;
                                padding: 4px;
                                color: $neu-02;
                                margin-bottom: 20px;

                                @include sm {
                                    bottom: 16px;
                                }


                                &:before,
                                &:after {
                                    content: '';
                                    position: absolute;
                                    width: 100%;
                                    height: 0;
                                    top: 0;
                                    left: 0;
                                    background-color: $neu-06;
                                    transition: all 0.4s ease;
                                    border-radius: 0px 0px 4px 4px;
                                    z-index: -1;

                                    @include sm {
                                        top: initial;
                                        bottom: 0;
                                        border-radius: 4px 4px 0px 0px;
                                    }
                                }

                                &:after {
                                    z-index: -2;
                                    border-radius: 4px;
                                    background-color: transparent;
                                    box-shadow: 0px 0px 0px 0px rgba(black, 0);
                                    top: -36px;

                                    @include sm {
                                        top: 0;
                                    }
                                }

                                .dropItems {
                                    transition: all 0.4s ease;
                                    height: 0;
                                    overflow-y: auto;

                                    .dropItem {
                                        z-index: 1;
                                        display: flex;
                                        align-items: center;
                                        width: 100%;
                                        padding: 10px;
                                        font-size: 14px;
                                        opacity: 0;
                                        border-radius: 4px;
                                        cursor: pointer;
                                        transform: translateY(-40px);
                                        transition: all 0.4s ease, transform 0.4s 0.3s ease, opacity 0.3s ease;
                                        background-color: transparent;

                                        &:hover {
                                            color: $m-01;
                                            transition: all 0.4s ease;
                                            background-color: white;
                                        }
                                    }
                                }
                            }

                            &.open {
                                .dropContent {
                                    border-radius: 4px 4px 0px 0px;

                                    @include sm {
                                        border-radius: 0px 0px 4px 4px;
                                    }

                                    .arrowDrop {
                                        img {
                                            transform: rotate(180deg);
                                        }
                                    }
                                }

                                .dropOpen {
                                    visibility: visible;
                                    display: flex;

                                    &:before,
                                    &:after {
                                        transition: all 0.4s ease;
                                        height: 100%;
                                    }

                                    &:after {
                                        box-shadow: 0px 10px 15px 0px rgba(black, 0.3);
                                        height: calc(100% + 36px);

                                        @include sm {
                                            //height: 100%;
                                            bottom: -16px;
                                            box-shadow: 0px -10px 15px 0px rgba(black, 0.3);
                                        }
                                    }

                                    .dropItems {
                                        height: 148px;
                                        display: flex;
                                        flex-direction: column;

                                        @include sm {
                                            flex-direction: column-reverse;
                                        }

                                        .dropItem {
                                            transition: all 0.4s ease, transform 0.4s 0.1s ease, opacity 0.3s 0.2s ease;
                                            opacity: 1;
                                            transform: translateY(0px);
                                        }
                                    }
                                }
                            }
                        }
                    }

                    .quantity {
                        margin-left: 60px;
                        display: flex;
                        flex-direction: column;
                        position: relative;

                        .quantityCounter {
                            display: flex;
                            align-items: center;
                            width: fit-content;

                            .inputQuantity {
                                width: 28px;
                                margin: 0 8px 0px 4px;
                                text-align: center;
                                background-color: transparent;
                                font-size: 14px;
                                color: $neu-02;
                                font-family: $font-01;
                                cursor: default;
                                user-select: none;
                            }

                            .btnQuantity {

                                &:first-of-type {
                                    margin-right: 4px;
                                }
                            }
                        }

                        .error {
                            position: absolute;
                            display: none;
                            bottom: -25px;
                            width: max-content;
                            color: #dd2828;

                            animation: error 0.3s ease;

                            @keyframes error {

                                0% {
                                    opacity: 0;
                                    transform: translateX(20px);
                                }
                            }
                        }
                    }
                }
            }
        }
    }
}


// Swiper

.galleryMain {
    width: 100%;
    margin-right: auto;
    position: relative;

    &:before {
        content: '';
        position: absolute;
        width: 100px;
        height: 100%;
        background-color: red;
        background: linear-gradient(90deg, transparent 50%, white 80%);
        right: 0;
        z-index: 2;
        display: none;

        @include lg {
            display: block;
        }

        @include sm {
            display: none;
        }
    }

    @include lg {
        margin-right: 0;
        width: calc(100% + 20%);
    }

    @include sm {
        margin-right: auto;
        transform: translateX(0px);
        width: 100vw;
    }


    .swiper-slide {
        width: 100%;

        transition: all 0.4s ease;

        @include sm {
            height: 300px;
            width: 100vw;
        }

        @include xs {
            height: 200px;
        }

        .scene {
            display: flex;
            justify-content: center;
            align-items: center;
            position: relative;

            @include lg {
                justify-content: flex-end;
            }


            @include sm {
                display: flex;
                justify-content: center;
                align-items: center;
                object-fit: cover;
                height: 300px;
            }

            @include xs {
                height: 200px;
            }
        }

        img {
            max-width: 600px;
            width: 100%;
            height: 100%;
            object-fit: cover;
            position: relative;

            @include lg {
                padding-right: 60px;
            }

            @include md {
                width: 90%;
                height: 90%;
                padding-right: 30px;
            }

            @include sm {
                width: initial;
                height: 100%;
            }
        }

        .shadow {
            position: absolute;
            filter: saturate(0%) blur(20px) contrast(0) grayscale(1) brightness(0);
            z-index: -1;
            top: 40px !important;
            left: initial !important;
            opacity: 0.3;

            @include lg {
                right: 20px;
            }

            @include sm {
                display: none !important;
            }
        }

        &.swiper-slide-next,
        &.swiper-slide-prev {
            opacity: 0.5;

            @include sm {
                opacity: 1;
            }
        }
    }
}

.galleryThumbs {
    height: auto;
    margin: 0;
    margin-bottom: 60px;

    @include sm {
        display: none;
    }

    .swiper-wrapper {
        display: grid;
        grid-template-columns: repeat(6, 1fr);
        grid-template-rows: auto;
        grid-column-gap: 20px;
        overflow: visible;

        @include md {
            grid-template-rows: repeat(2, 60px);
            grid-template-columns: repeat(3, 60px);
            grid-row-gap: 10px;
        }
    }

    .swiper-slide {
        width: 100%;
        height: 100%;
        opacity: 0.4;
        background-color: white;
        cursor: pointer;
        transition: all 0.3s ease;
        border-radius: 4px;
        display: flex;
        align-items: center;

        img {
            width: 100%;
            object-fit: cover;
            border: 2px solid $neu-05;
            transition: all 0.2s ease;
            border-radius: 4px;
        }

        &:hover {
            img {
                border: 6px solid rgba($neu-05, 0.5);
            }
        }

        &.swiper-slide-thumb-active {
            opacity: 1;

            img {
                border: 4px solid $m-01;
            }
        }
    }
}
!

JS 

              
                window.addEventListener("load", event => {

    function productHeading() {
        ////////////////
        // Variables
        ////////////////

        const product = {

            value: 125,
            images: [{
                    img: 'https://rafaelalucas.com/dailyui/12/assets/img01.png'
                },
                {
                    img: 'https://rafaelalucas.com/dailyui/12/assets/img02.png'
                },
                {
                    img: 'https://rafaelalucas.com/dailyui/12/assets/img03.png'
                },
                {
                    img: 'https://rafaelalucas.com/dailyui/12/assets/img04.png'
                },
                {
                    img: 'https://rafaelalucas.com/dailyui/12/assets/img05.png'
                },
                {
                    img: 'https://rafaelalucas.com/dailyui/12/assets/img06.png'
                }
            ]
        }

        const btnAdd = document.querySelector('.btn.add'),
            btnContainer = document.querySelector('.btnContainer'),
            wrapper = document.querySelector('.wrapper'),
            itemNumber = document.querySelector('.itemNumber'),
            shoppingQuantity = document.querySelector('.shoppingQuantity'),
            inputQuantity = document.querySelector('.inputQuantity'),
            plus = document.querySelector('.plus'),
            minus = document.querySelector('.minus'),
            arrowDrop = document.querySelector('.arrowDrop'),
            dropdown = document.querySelector('.dropdown'),
            nav = document.querySelector('nav'),
            error = document.querySelector('.error'),
            shoppingIcon = document.querySelector('.shoppingIcon'),
            shoppingMenu = document.querySelector('.shoppingMenu'),
            emptyCart = document.querySelector('.emptyCart');

        let = priceFinal = document.querySelector('.priceFinal'),
            priceOriginal = document.querySelector('.priceOriginal'),
            discount = null,
            sizeNumber = document.querySelector('.sizeNumber'),
            dropItem = document.querySelectorAll('.dropItem'),
            maxQuantity = 5,
            newMaxQuantity = maxQuantity;

        ////////////////
        // Events
        ////////////////

        btnAdd.addEventListener('click', addItem);
        plus.addEventListener("click", plusQuantity);
        minus.addEventListener("click", minusQuantity);
        arrowDrop.addEventListener("click", openDrop);
        shoppingIcon.addEventListener("click", openShoppingCart);

        emptyCart.addEventListener("click", cleanCart);

        dropItem.forEach(function (el) {
            el.addEventListener("click", getSize);
        })

        window.addEventListener("resize", resize);


        ////////////////
        // Functions
        //////////////// 

        // Fixed Nav 

        window.onscroll = function () {
            if (window.pageYOffset >= 60) {
                nav.classList.add("fixed");
            } else {
                nav.classList.remove("fixed");
            }
        };

        // Change button position on mobile

        function resize() {
            //Button
            if (window.innerHeight > wrapper.offsetHeight) {
                btnContainer.classList.remove('fixedBtn');
            } else {
                btnContainer.classList.add('fixedBtn');
            }
            parallax();
        }

        // Parallax

        function parallax() {
            if (window.innerWidth > 800) {
                var scene = document.querySelectorAll('.scene');
                scene.forEach(pic => {
                    var parallax = new Parallax(pic);
                })
            }
        }

        // Calculate the Discount

        function getDisccount() {
            priceOriginal.innerText = product.value + "€";
            discount = product.value - (product.value * (30 / 100));
            priceFinal.innerText = discount + "€";
        }

        // Calculate the the Prices with discounts

        function getPrice() {

            priceFinal.innerText = discount * inputQuantity.value + "€";
            priceOriginal.innerText = product.value * inputQuantity.value + "€";

            setTimeout(() => {
                priceFinal.classList.remove('anime');
            }, 400);
        }

        // Update the prices with the quantity counter

        function plusQuantity() {
            if (inputQuantity.value < maxQuantity) {
                inputQuantity.value == inputQuantity.value++;
                priceFinal.classList.add('anime');
            }
            getPrice();
        }

        function minusQuantity() {
            if (inputQuantity.value > 1) {
                inputQuantity.value == inputQuantity.value--;
                priceFinal.classList.add('anime');
            }
            getPrice();
        }

        // Add items to shopping cart

        function addItem() {

            let cenas = parseInt(itemNumber.innerText) + parseInt(inputQuantity.value);

            if (cenas <= newMaxQuantity) {
                itemNumber.style.display = "flex";
                itemNumber.innerText = cenas;
                shoppingQuantity.innerText = "x" + cenas;
                itemNumber.classList.add("addItem");
                error.style.display = "none";
            } else {
                error.style.display = "flex";
            }

            setTimeout(() => {
                itemNumber.classList.remove("addItem");
            }, 700);
        }

        // Open Drop

        function openDrop() {
            if (dropdown.classList.contains('open')) {
                dropdown.classList.remove('open');
            } else {
                dropdown.classList.add('open');
            }
        }

        //get Drop Size Number Value 

        function getSize(e) {
            sizeNumber.innerText = e.currentTarget.innerText;
            openDrop();
        }

        // Open Shopphing cart

        function openShoppingCart() {
            if (itemNumber.innerText != "0") {
                if (shoppingMenu.classList.contains('openShopping')) {
                    shoppingMenu.classList.remove('openShopping');
                } else {
                    shoppingMenu.classList.add('openShopping');
                }
            }
        }

        //Clean Shopping Cart

        function cleanCart() {
            shoppingMenu.classList.remove('openShopping');
            itemNumber.style.display = "none";
            itemNumber.classList.remove('addItem');
            itemNumber.innerText = "0";
        }

        // Populate the images for Swiper

        product.images.forEach(function (el) {

            let template = `
                <div class="swiper-slide">
                    <div class="scene" data-hover-only="false"> 
                        <img src="${el.img}" data-depth="0.5">
                        <img src="${el.img}" data-depth="1" class="shadow">
                    </div>
                </div>`;

            let template2 = `
                <div class="swiper-slide">
                    <img src="${el.img}">
                </div>`;

            document.querySelector('.galleryMain .swiper-wrapper').insertAdjacentHTML('beforeend', template);
            document.querySelector('.galleryThumbs .swiper-wrapper').insertAdjacentHTML('beforeend', template2);
        });


        // Make the slider function

        var galleryThumbs = new Swiper('.galleryThumbs', {
            spaceBetween: 0,
            slidesPerView: 'auto',
            loop: false,
            allowTouchMove: false,
            allowSlidePrev: false,
            allowSlideNext: false,

        });

        var galleryMain = new Swiper('.galleryMain', {
            spaceBetween: 300,
            speed: 500,
            loop: true,
            loopedSlides: 5, //looped slides should be the same
            effect: "coverflow",
            coverflowEffect: {
                rotate: 50,
                slideShadows: false,
                depth: 200,
                stretch: 50,

            },
            navigation: {
                nextEl: '.swiper-button-next',
                prevEl: '.swiper-button-prev',
            },
            pagination: {
                el: '.swiper-pagination',
                clickable: true,

            },
            thumbs: {
                swiper: galleryThumbs,
            },
        });

        // Call functions 
        getDisccount();
        parallax();
        resize();
    }

    productHeading();
});
!
999px

Console