Bootstrap 4.1.1 Snippet by csshint

<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js"></script> <script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script> <!------ Include the above in your HEAD tag ----------> <section> <div class="container"> <div class="background-img"> <div class="box"> <span></span> <span></span> <span></span> <span></span> <div class="content"> <h2>My animated Border </h2> <p><a href="http://www.csshint.com/" style="color:#00ffe9;" target="_blank">All our modules are designed to play nicely with responsive of course. At the end of the day it comes down to the theme you use - our code doesn't get in your way.</a></p> </div> </div> </div> </div> </section>
*{ margin:0; padding:0; } .container{ padding-top: 20px; padding-bottom: 20px;} body{ background-color: #111845; } .background-img{ background-image: url("https://3.bp.blogspot.com/-piZWCW2uUbg/W2fPXxkWZgI/AAAAAAAAOu0/eydmMjTIqcwLMHEEr2H7imqoRTxMw4o9QCLcBGAs/s1600/among_trees_night_dribbble.png"); height: 400px; width: 800px; background-repeat: no-repeat; background-size: cover; margin: 5% auto; padding:20px; border: 1px solid #2a3cad; border-radius: 4px; box-shadow: 0px 0px 5px #2a3cad; position: relative; } .content h2{ font-size:19px;} .box{ position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); width: 300px; height: 300px; background: #111845a6; box-sizing: border-box; overflow: hidden; box-shadow: 0 20px 50px rgb(23, 32, 90); border: 2px solid #2a3cad; color: white; padding: 20px; } .box:before{ content: ''; position:absolute; top:0; left:-100%; width:100%; height:100%; background: rgba(255,255,255,0.1); transition:0.5s; pointer-events: none; } .box:hover:before{ left:-50%; transform: skewX(-5deg); } .box .content{ position:absolute; top:15px; left:15px; right:15px; bottom:15px; border:1px solid #f0a591; padding:20px; text-align:center; box-shadow: 0 5px 10px rgba(9,0,0,0.5); } .box span{ position: absolute; top: 0; left: 0; width: 100%; height: 100%; display: block; box-sizing: border-box; } .box span:nth-child(1) { transform:rotate(0deg); } .box span:nth-child(2) { transform:rotate(90deg); } .box span:nth-child(3) { transform:rotate(180deg); } .box span:nth-child(4) { transform:rotate(270deg); } .box span:before { content: ''; position: absolute; width:100%; height: 2px; background: #50dfdb; animation: animate 4s linear infinite; } @keyframes animate { 0% { transform:scaleX(0); transform-origin: left; } 50% { transform:scaleX(1); transform-origin: left; } 50.1% { transform:scaleX(1); transform-origin: right; } 100% { transform:scaleX(0); transform-origin: right; } }

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