body {
  background-color: #555;
  margin: 0;
  padding: 0;
}
.container {
  position: relative;
  width: 90%;
  height: auto;
  margin: 20px auto;
  border: 6px solid #aaa;
  border-radius: 20px;
  overflow: hidden;
}
header {
  position: relative;
  width: 100%;
  height: auto;
  overflow: hidden;
}
header img {
  width: 100%;
  overflow: hidden;
}
h1,
h2,
h3 {
  position: relative;
  text-align: center;
  color: #aaa;
  font-family: "Roboto", sans-serif;
  margin: 40px 10px;
}
h1 {
  font-size: 3em;
}
h2 {
  font-size: 2em;
  margin: 0px 10px;
}
h3 {
  font-size: 1.5em;
  margin: 10px 10px;
}
.images {
  position:relative;
  width:90%;
  height:auto;
  margin:0 auto;
}
section img {
  position: relative;
  width: 48%;
}
.video {
  position:relative;
  width:566px;
  margin:10px auto;
  display:block;
}
.mobile-video {
  position:relative;
  width:373px;
  margin:10px auto;
  display:none;
}

@media screen and (min-width: 400px) {
  .video {
    display:none;
  }
  .mobile-video {
    display:block;
  }
}