JSFiddle - React, Tailwind, and code Playground

HTML

<div class="background">
    <div class="tablet-container">
        <div class="tablet-background"></div>
        				
        <div class="close-button"></div>
        				
        <div class="tablet-content"></div>
    </div>
</div>

CSS

* {
  box-sizing: border-box;
  padding: 0;
  margin: 0;
}

.background {
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.3);
    display: flex;
    justify-content: center;
    align-items: center;
}

.tablet-container {
    width: 1130px;
    height: 760px;
    background-image: url("https://i.imgur.com/3ylmPlN.png");
    background-size: cover;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.close-button {
    width: 40px;
    height: 40px;
    background-color: #bbb;
    border: 1px solid #fff;
    border-radius: 50%;
    position: absolute;
    right: 18px;
}

.close-button:hover {
    background-color: #333;
}

.tablet-background {
    width: 1000px;
    height: 640px;
    position: absolute;
}

.tablet-content {
    width: 1000px;
	  height: 640px;
    background-color: #020104;
    position: relative;
	  z-index: 2;
}

JavaScript

$(".tablet-container").mouseenter(function() {
    $(this).css("opacity", 0.3)
})

$(".tablet-content").mouseenter(function() {
    $(".tablet-container").css("opacity", 1)
})