#mainContainer {
    position: relative;
    /*width: 640px;*/
    width: 100%;
    height: 360px;
}
#content, #adContainer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 2px;
    border-radius: 12px;
    /* padding: 5px; */
}  

#contentElement {
    width: 100%;
    height: 100%;
    overflow: hidden;
}  


#playButton {
  margin-top:10px;
  vertical-align: top;
  width: 350px;
  height: 60px;
  padding: 0;
  font-size: 22px;
  color: white;
  text-align: center;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.25);
  background: #2c3e50;
  border: 0;
  border-bottom: 2px solid #22303f;
  cursor: pointer;
  -webkit-box-shadow: inset 0 -2px #22303f;
  box-shadow: inset 0 -2px #22303f;
}
.skip_button {
  float: initial;
    width: 300px;
    height: 70px;
    border-radius: 35px;
    border: 0;
    font-size: 20px;
    color: #fff960;
    /*margin-top: 50px;*/
    /*margin-left: 50px;*/
    background-color: #1b9de0;
    box-shadow: 5px 5px 5px rgba(0, 0, 0, 0.3);
}

@media (max-width: 480px) {
  #mainContainer {
    height: 250px;
  }
}


@media (max-width: 480px) {
  .skip_button {
    float: initial;
    width: 250px;
    height: 60px;
    border-radius: 35px;
    border: 0;
    font-size: 20px;
    color: #fff960;
    margin-top: 0px;
    margin-left: 0px;
    background-color: #1b9de0;
    box-shadow: 5px 5px 5px rgba(0, 0, 0, 0.3);
  }  
}

.clearfix::after {
  content: "";
  clear: both;
  display: table;
}