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Source: https://dev.to/klikvegas

  1. <!DOCTYPE html>
  2. <html>
  3. <head>
  4.  <title>The page you were looking for doesn't exist (404)</title>
  5.  <meta name="viewport" content="width=device-width,initial-scale=1">
  6.  <style>
  7.    .not-found-page {
  8.      height: 100vh;
  9.      min-height: 500px;
  10.    }
  11.    .tv__outer {
  12.      display: table;
  13.      position: absolute;
  14.      height: 98%;
  15.      width: 98%;
  16.    }
  17.  
  18.    .tv__middle {
  19.      display: table-cell;
  20.      vertical-align: middle;
  21.      position: relative;
  22.    }
  23.  
  24.    .tv__inner {
  25.      margin-left: auto;
  26.      margin-right: auto;
  27.      display: table;
  28.    }
  29.  
  30.    .tv__inner--special {
  31.      position: absolute;
  32.      left: 0;
  33.      right: 0;
  34.      margin: auto;
  35.      -webkit-animation-name: fade;
  36.      -webkit-animation-iteration-count: infinite;
  37.      -webkit-animation-duration: 2s;
  38.      animation-name: fade;
  39.      animation-iteration-count: infinite;
  40.      animation-duration: 2s;
  41.    }
  42.  
  43.    .tv__inner--text {
  44.      margin-left: auto;
  45.      margin-right: auto;
  46.      display: table;
  47.      font-size: 22px;
  48.      font-weight: 500;
  49.    }
  50.  
  51.    .tv__inner--special, .tv__inner {
  52.      max-width: 85%;
  53.      width: 300px;
  54.      border: 25px solid rgb(54, 55, 124);
  55.      border-radius: 36px;
  56.    }
  57.    .tv__inner--text {
  58.      text-align: center;
  59.      max-width: 90%;
  60.    }
  61.    .tv__inner--text::before {
  62.      content: "";
  63.      display: block;
  64.      height: 18px;
  65.    }
  66.    .tv__inner--text a::before {
  67.      content: "";
  68.      display: block;
  69.      height: 26px;
  70.    }
  71.  
  72.    @-webkit-keyframes fade {
  73.      0% {opacity: 1;}
  74.      10% {opacity: 1;}
  75.      20% {opacity: 0;}
  76.      25% {opacity: 0;}
  77.      28% {opacity: 0;}
  78.      30% {opacity: 0;}
  79.      33% {opacity: 1;}
  80.      45% {opacity: 1;}
  81.      53% {opacity: 0;}
  82.      100% {opacity: 0;}
  83.    }
  84.  
  85.    @keyframes fade {
  86.      0% {opacity: 1;}
  87.      10% {opacity: 1;}
  88.      20% {opacity: 0;}
  89.      25% {opacity: 0;}
  90.      28% {opacity: 0;}
  91.      30% {opacity: 0;}
  92.      33% {opacity: 1;}
  93.      45% {opacity: 1;}
  94.      53% {opacity: 0;}
  95.      100% {opacity: 0;}
  96.    }
  97.  </style>
  98. </head>
  99.  
  100. <body>
  101.  <div class="not-found-page base-background-color">
  102.    <div class="tv__outer">
  103.        <div class="tv__middle">
  104.          <img class="tv__inner" src="https://i.imgur.com/AdvTDlI.jpg" alt="404 not found">
  105.          <p class="tv__inner--text">This page does not exist<a href="/">Return to Home Page</a></p>
  106.        </div>
  107.      </div>
  108.  </div>
  109. </body>
  110. </html>
  111.  
Copyright © 2002-9 Sam Ruby, Mark Pilgrim, Joseph Walton, and Phil Ringnalda