body {
  top: 0px;
  margin-top: 0px; }

.navbar {
  position: fixed;
  top: 0px;
  left: 0px;
  background-color: rgba(255, 255, 255, 0.9); }

.section.about {
  margin-top: 140px; }
  .section.about .section-subtitle {
    text-align: left;
    font-size: 21px;
    margin-top: 80px; }
  .section.about .ytplayer {
    width: 100%; }

.footer {
  margin-top: 200px; }

@media (max-width: 700px) {
  .section.about .section-subtitle {
    font-size: 18px; }
    .section.about .section-subtitle .ytplayer {
      height: 250px; } }