body {
  background-image: url('running-on-the-beach.jpg');
  background-size: cover;
  font-family: 'Bitter', serif;
  color: #fff;
  line-height: 1.5;
}

/* vertically centred; max-width 50em */
div.container {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  max-width: 580px;
}

h1 {
  font-size: 68px;
  font-weight: 700;
  font-style: italic;
  text-align: center;
  margin: 0 0 0.75em 0;
  padding: 0;
  text-shadow: 0 0 10px rgba(0, 0, 0, 0.75);
  line-height: 1.1;
}
h1 small.subtitle {
  font-size: 30px;
  font-weight: 100;
  margin-left: 90px;
}

p {
  text-align: center;
  text-shadow: 0 0 5px rgba(0, 0, 0, 0.75);
  font-size: 20px;
  font-weight: 100;
}

a { color: #fff; }

.videowrapper {
    float: none;
    clear: both;
    width: 100%;
    position: relative;
    padding-bottom: 56.25%;
    padding-top: 25px;
    height: 0;
    margin-bottom: 2em;
}
.videowrapper iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

@media (max-device-width: 480px) {
  div.container {
    position: static;
    transform: none;
    max-width: 100%;
    padding: 3em 0;
  }

  h1 {
    font-size: 45px;
  }
  h1 small.subtitle {
    font-size: 24px;
    margin-left: 30px;
  }

  p {
    margin-left: 1em;
    margin-right: 1em;
  }
}