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HTML

              
                <!DOCTYPE html>
<html lang="en" >

<head>
  <meta charset="UTF-8">
  <title>market-wp.com</title>
  
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/normalize/5.0.0/normalize.min.css">

</head>

<body>

  <div id='oopss'>
    <div id='error-text'>
        <img src="https://cdn.rawgit.com/ahmedhosna95/upload/1731955f/sad404.svg" alt="404">
        <span>404 PAGE</span>
        <p class="p-a">
           . The page you were looking for could not be found</p>
        <p class="p-b">
            ... Back to previous page
        </p>
        <a href='#' class="back">... Back to previous page</a>
    </div>
</div>
  
  

</body>

</html>
              
            
!

CSS

              
                #oopss {
  background: linear-gradient(-45deg, #fff300, #efe400);
  position: fixed;
  left: 0px;
  top: 0;
  width: 100%;
  height: 100%;
  line-height: 1.5em;
  z-index: 9999;
}
#oopss #error-text {
  font-size: 40px;
  display: flex;
  flex-direction: column;
  align-items: center;
  font-family: 'Shabnam', Tahoma, sans-serif;
  color: #000;
  direction: rtl;
}
#oopss #error-text img {
  margin: 85px auto 20px;
  height: 342px;
}
#oopss #error-text span {
  position: relative;
  font-size: 3.3em;
  font-weight: 900;
  margin-bottom: 50px;
}
#oopss #error-text p.p-a {
  font-size: 19px;
  margin: 30px 0 15px 0;
}
#oopss #error-text p.p-b {
  font-size: 15px;
}
#oopss #error-text .back {
  background: #fff;
  color: #000;
  font-size: 30px;
  text-decoration: none;
  margin: 2em auto 0;
  padding: .7em 2em;
  border-radius: 500px;
  box-shadow: 0 20px 70px 4px rgba(0, 0, 0, 0.1), inset 7px 33px 0 0px #fff300;
  font-weight: 900;
  transition: all 300ms ease;
}
#oopss #error-text .back:hover {
  -webkit-transform: translateY(-13px);
          transform: translateY(-13px);
  box-shadow: 0 35px 90px 4px rgba(0, 0, 0, 0.3), inset 0px 0 0 3px #000;
}

@font-face {
  font-family: Shabnam;
  src: url("https://cdn.rawgit.com/ahmedhosna95/upload/ba6564f8/fonts/Shabnam/Shabnam-Bold.eot");
  src: url("https://cdn.rawgit.com/ahmedhosna95/upload/ba6564f8/fonts/Shabnam/Shabnam-Bold.eot?#iefix") format("embedded-opentype"), url("https://cdn.rawgit.com/ahmedhosna95/upload/ba6564f8/fonts/Shabnam/Shabnam-Bold.woff") format("woff"), url("https://cdn.rawgit.com/ahmedhosna95/upload/ba6564f8/fonts/Shabnam/Shabnam-Bold.woff2") format("woff2"), url("https://cdn.rawgit.com/ahmedhosna95/upload/ba6564f8/fonts/Shabnam/Shabnam-Bold.ttf") format("truetype");
  font-weight: bold;
}
@font-face {
  font-family: Shabnam;
  src: url("https://cdn.rawgit.com/ahmedhosna95/upload/ba6564f8/fonts/Shabnam/Shabnam.eot");
  src: url("https://cdn.rawgit.com/ahmedhosna95/upload/ba6564f8/fonts/Shabnam/Shabnam.eot?#iefix") format("embedded-opentype"), url("https://cdn.rawgit.com/ahmedhosna95/upload/ba6564f8/fonts/Shabnam/Shabnam.woff") format("woff"), url("https://cdn.rawgit.com/ahmedhosna95/upload/ba6564f8/fonts/Shabnam/Shabnam.woff2") format("woff2"), url("https://cdn.rawgit.com/ahmedhosna95/upload/ba6564f8/fonts/Shabnam/Shabnam.ttf") format("truetype");
  font-weight: normal;
}

              
            
!

JS

              
                
              
            
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