body, html {
  margin: 0;
  padding: 0;
  font-family: sans-serif;
  background: #000;
  color: #fff;
  overflow-x: hidden;
}

section {
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero { background: #111; }
.content { background: #222; }
.video-wrapper video {
  width: 100%;
  height: auto;
  display: block;
}
.end { background: #333; }