tshirt popup

tshirt.html

<div id="tshirt-claim">
  <div class="close" onclick="document.getElementById('tshirt-claim').style.display = 'none';">&times;</div>
  <img src="https://gifts.offerzen.com/tshirt.jpg" alt="Offerzen Tshirt">
  <h3>Get a free shirt!</h3>
  <h4>JSinSA attendees get a free tshirt, just complete Offerzen's onboarding.</h4>
  <a class="button button-primary" href="https://www.offerzen.com?source=jsinsa&id=IDPARAMGOESHERE">Claim my tshirt</a>
</div>

<style>
  #tshirt-claim {
    display:none;
    font-family: Arial;
    box-shadow: 4px 3px 8px rgba(0,0,0,0.2);
    z-index:1000;
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: #FFF;
    padding: 30px 4px 25px 30px;
  }
  #tshirt-claim h3 {
    font-size: 32px;
    padding: 32px 0 0 0;
  }
  #tshirt-claim h4 {
    padding: 5px 0 12px 0;
    font-size: 20px;
    color: gray;
    font-weight: 300;
  }
  #tshirt-claim img {
    float: left;
    height: 225px;
    padding: 0 40px 0 0;
  }
  #tshirt-claim .close {
    position: absolute;
    top: 5px;
    right: 17px;
    font-size: 32px;
    font-weight: 200;
    cursor: pointer;
  }
  @media only screen and (max-width : 435px) {
    #tshirt-claim {
      bottom: 0;
      right: 0;
      padding: 30px 4px 25px 30px;
    }
    #tshirt-claim img {
      height: 145px;
      padding: 0 30px 0 0;
    }
    #tshirt-claim h4 {
      padding: 13px 10px 12px 0;
      clear: both;
    }
  }
</style>
<script>
  setTimeout(function(){
    document.getElementById('tshirt-claim').style.display = 'block'
  }, 15000)
</script>