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HTML CSS kodu paylaşıyorum.
1-sol tarafa kutucuk lazım
2-arka plan gri olacak
3-bakiyeler değişken mi olacak bilemedim
4-kategori ürün çubuğu ortalamak lazım
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="stylesheet" href="css/main.css">
    <title>epin</title>
    <link rel="stylesheet" href="style.css">
</head>
<link rel="stylesheet" href="styles/style.css">
<body>
    <div class="container">
        <header class="header"></header>
        <a href="#" class="logo">
            <img src="images/logout.png" alt="logoo">
        </a>
        <div class="navbar">
        
            <ul>
                <a href="#" class="logo">
                    <img src="images/information-button.png" alt="logoo">
                </a>
                <li><a href="#">Hakkımızda</a></li>
                <a href="#">
                    <img src="images/phone.png" alt="logoo">
                </a>
                <li><a href="#">İletişim</a></li>
                <a href="#">
                    <img src="images/computer.png" alt="logoo">
                </a>
                <li><a href="#">Blog</a></li>
                <a href="#">
                    <img src="images/faq.png" alt="logoo">
                </a>
                <li><a href="#">Sıkça Sorulan Sorular</a></li>
            </ul>
            <div class="showcase-content" >
   
                <div class="search-box">
                <input class="search-txt" type="text" name="box" placeholder="Kategori veya ürün arayın"><a href="#" class="btn  btn-x1"><i class="fas fa-chevron-right btn-icon"></i>
                </a>            
                </div>
            </div>
            
        </div>
        <div class="navbar">
            <ul>
            
                <a href="#">
                    <img src="images/menu (4).png" alt="logoo">
                </a>
                <li><a href="#">Kategoriler</a></li>
                <a href="#">
                    <img src="images/live.png" alt="logoo">
                </a>
                <li><a href="#">Yayıncılar</a></li>
                <a href="#">
                    <img src="images/boxes.png" alt="logoo">
                </a>
                <li><a href="#">CD Key</a></li>
                <a href="#">
                    <img src="images/lightning.png" alt="logoo">
                </a>
                <li><a href="#">Valorant</a></li>
                <a href="#">
                    <img src="images/rocket.png" alt="logoo">
                </a>
                <li><a href="#">Pubg Mobile</a></li>
                <a href="#">
                    <img src="images/handshake.png" alt="logoo">
                </a>
                <li><a href="#">Oyuncu Pazarı</a></li>
                <a href="#">
                    <img src="images/trophy.png" alt="logoo">
                </a>
                <li><a href="#">Çekilişler</a></li>
                <a href="#">
                    <img src="images/shield.png" alt="logoo">
                </a>
                <li><a href="#">Knight Online</a></li>
                <a href="#">
                    <img src="images/helmet.png" alt="logoo">
                </a>
                <li><a href="#">Rise Online</a></li>
            </ul>
        </div>
    </div>
    <section>
        <h1>LOGO</h1>
    </section>
    <div class="buttons">
        <button>
            <a href="#">
                <img src="images/cart.png" alt="logoo">
            </a>
            <i class="class">Sepetim</i>
        </button>
    </div>
    <nav>
        <ul>
            <li><a href="#">Hesabım</a></li>
            <li><a href="#">Siparişlerim</a></li>
            <li><a href="#">Favorilerim</a></li>
            <li><a href="#">Bildirimlerim</a></li>
        </ul>
    </nav>
    <section class="menu">
        <h1> <span>Hızlı Menü</span></h1>
        <div class="box-container">
            <div class="box">
                <div class="box-head">
                    <img src="images/wallet2.png" alt="menu">
                </div>
                <div class="box-bottom">
                    <a href="#" class="btn">Bakiye yükle</a>
                </div>
            </div>
            <div class="box">
                <div class="box-head">
                    <img src="images/box.png" alt="menu">
                </div>
                <div class="box-bottom">
                    <a href="#" class="btn">Siparişlerim</a>
                </div>
            </div>
            <div class="box">
                <div class="box-head">
                    <img src="images/store.png" alt="menu">
                </div>
                <div class="box-bottom">
                    <a href="#" class="btn">Mağazam</a>
                </div>
            </div>
            <div class="box">
                <div class="box-head">
                    <img src="images/add.png" alt="menu">
                </div>
                <div class="box-bottom">
                    <a href="#" class="btn">İlan ekle</a>
                </div>
            </div>
            <div class="box">
                <div class="box-head">
                    <img src="images/heart22.png" alt="menu">
                </div>
                <div class="box-bottom">
                    <a href="#" class="btn">Favoriler</a>
                </div>
            </div>
        </div>
    </section>
    <section class="bakiye">
        <div class="box-container">
            <div class="box">
                <div class="box-head">
                    <span class="title">Toplam bakiye</span>
                </div>
            </div>
            <div class="box">
                <div class="box-head">
                    <span class="title">Kullanılabilir bakiye</span>
                </div>
            </div>
            <div class="box">
                <div class="box-head">
                    <span class="title">Çekilebilir bakiye</span>
                </div>
            </div>
            <div class="box">
                <div class="box-head">
                    <span class="title">Bonus bakiye</span>
                </div>
            </div>
            <div class="box">
                <div class="box-head">
                    <span class="title">Bloke bakiye</span>
                </div>
            </div>
        </div>
    </section>
    <section class="footer">
        <div class="share">
            <a href="#">
                <i>linkk</i>
                <i>linkk</i>
                <i>linkk</i>
                <i>linkk</i>
                <i>linkk</i>
            </a>
        </div>
    </section>
    <div class="watch-everywhere">
        <h2>Kurumsal</h2>
    
    </div>
    <footer class="page-down">
    
        <p><a href="#">Hakkımızda</a></p>   
        <p><a href="#">Marka Yönergeleri</a></p>
        <p><a href="#">Sertifikalarımız</a></p>
        <p><a href="#">İnsan Kaynakları</a></p>
        <p><a href="#">Sponsorluk</a></p>
        <p><a href="#">WhatsApp Destek</a></p>
        <p><a href="#">Sipariş Sorgula</a></p>
        <p><a href="#">Steam Cüzdan Kodu</a></p>
    
</footer>
    <div id="alt">Alt</div>
    
   
</body>
</html> 
CSS
*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    outline: none;
    border: none;
    text-decoration: none;
    text-transform: capitalize;
}
.logo img{
    height: 1rem;
}
.container .navbar{
    width: 100%;
    height: 50px;
    background: rgba(220, 220, 220);
}
.navbar ul{
    float: left;
    margin-left: 20px;
}
.navbar ul{
    float: left;
    margin-left: 20px;
}
.navbar .logo{
    display: inline-block;
}
.navbar .logo a{
    text-decoration: none;
    font-size: 30px;
    font-family: sans-serif;
    color: #000000;
}
.navbar ul li{
    list-style: none;
    display: inline-block;
    margin: 0 8px;
}
.navbar ul li a{
    color: black;
    text-decoration: none;
}
.section{
    section-spacing: 60px;
    shadow: 0px 2px 5px 0px hsla(0, 0%, 0%, 0.2);
}
a{
    color: var(--black-color);
    text-decoration: none;
}
.heading {
    color: black;
    text-transform: uppercase;
    font-size: 4rem;
    margin-bottom: 3.5rem;
    border-bottom: 0.1rem solid #000000;
}
.heading span {
    text-transform: uppercase;
}
.header .navbar a{
    margin: 0 1rem;
    font-size: 1.6rem;
    color: var(--black-color);
    border-bottom: 0.1rem solid transparent;
}
.menu .box-container{
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(10rem,1fr));
    gap: 1.5rem;
}
.menu .box-container .box{
    padding: 1rem;
    background-color: aqua;
    border-radius: 1rem;
    background-color: aqua;
    min-height: 2;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: space-between;
}
.menu .box-container .box img{
    width: 100%;
    object-fit: cover;
}
.bakiye .box-container{
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(10rem,1fr));
    gap: 1.5rem;
}
.bakiye .box-container .box{
    text-align: center;
    background-color: white;
    position: relative;
    border-radius: 3rem;
    height: 60rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 3rem;
}
.bakiye .box-container .box .box-head{
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    position: relative;
    z-index: 10;
}
.bakiye .box-container .box .box-head .title{
    font-size: 1.4rem;
}
.bakiye .box-container .box .box-head .name{
    font-size: 4rem;
    font-weight: bold;
    text-align: start;
    overflow-wrap: anywhere;
}
.footer .share {
    padding: 2rem 0;
}
.footer .share a {
    width: 5rem;
    height: 5rem;
    line-height: 5rem;
    color: black;
    font-size: 2rem;
    border: var(--border);
    border-radius: 50%;
    margin: 0.3rem;
}
.alt{
    width:100px;
    height:1px;
    position:absolute;
    bottom:0px;
    
    }