Demo for 404 Page with Swimming Fish

Preview

Source Code

                            <!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<!-- This script got from www.devanswer.com -->


<style>
html, body {
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
  background-color: #000;
}
.bg-img {
  position: absolute;
  width: 100%;
  height: 100%;
  background: url(https://devanswer.com/codes/files/fishschool_gif.gif) no-repeat center center fixed;
  background-size: cover;
  background-color: #000;
  opacity: 0.5;
  filter: alpha(opacity=50);
}
.content {
  font-family: "Avenir-Next", Avenir, Helvetica, sans-serif;
  color: #fff;
  background-color: none;
  z-index: 2;
  position: absolute;
  top: 50%;
  -webkit-transform: translateY(-50%);
  -ms-transform: translateY(-50%);
  transform: translateY(-50%);
}
h1 {
  font-size: 160px;
  margin-bottom: 0;
  margin-top: 0;
}
h2 {
  margin-top: 0;
  max-width: 700px;
  font-size: 30px;
  width: 90%;
}
p {
  text-align: left;
  padding-bottom: 32px;
}
.btn {
  display: inline-block;
  border: 1px solid #aaa;
  border-radius: 40px;
  padding: 15px 30px;
  margin-right: 15px;
  margin-bottom: 10px;
}
.btn:hover {
  color: #e2e2e2;
  background: rgba(255, 255, 255, 0.1);
}
@media only screen and (max-width: 480px) {
  .btn {
    background-color: white;
    color: #444444;
    width: 100%;
  }
  h1 {
    font-size: 120px;
  }
}
</style>

</head>
<body>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap-theme.min.css">
<div class="container-body">
	<div class='container'>
    <div class='row content'>
      <div class='col-lg-12'></div>
      <div class='col-lg-12'>
        <h1>404</h1>
        <h2>Oops, the page you're looking for does not exist.</h2>
        <p>
          You may want to head back to the homepage.
          <br>
            If you think something is broken, report a problem.
          </br>
        </p>
        <span class='btn'>RETURN HOME</span>
        <span class='btn'>REPORT PROBLEM</span>
      </div>
    </div>
  </div>
  <div class='bg-img'></div>
</div><div id="bcl"><a style="font-size:8pt;text-decoration:none;" href="http://www.devanswer.com">Developers Answer</a></div>

</body>
</html>

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