* {
  margin: 10px 0;
  color: #000;
  filter: grayscale(1);
  user-select: none;
}
body {
  font-family: sans-serif;
  padding: 0px 20px;
  max-width: 600px;
}
video {
  width: 100%;
  filter: contrast(10);
}
a{
  font-weight: bold;
}
h1{
  font-size: 35px;
}