JSFiddle - React, Tailwind, and code Playground

HTML

<header> 
    <img class="logo" src="logo.gif"/>
</header>
<main>
    <div class="open-card-BG">main content</div>
</main>
<footer>
    I am footer
</footer>

CSS

main {
    background-color: lightgrey;
    padding: 50px;
    margin: 0 -10px;
}
header {
    background-color: white;
    width: 100%;
    height: 50px;
}
.content-section {
    background-color: lightgrey;
    width: 100%;    
}
.logo {
    height: 20px;
    margin: 15px 5px;
    width: 116px;   
}
.open-card-BG {
    font-weight: 300;
    margin: 0 auto;
    width: 65%;
    padding: 20px 40px;
    object-fit: contain;
    max-width: 325px;
    min-height: 200px;
    border-radius: 5px;
    display: table;
    background-color: white;
    position: relative;
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.2);
}
.open-card-BG::after {
    content: '';
    position: absolute;
    top: 30px;
    left: 100%;
    width: 30px;
    height: 30px;
    background: url(../secure.svg) center no-repeat;
    background-size: contain;
}