style.css

html {
  background: #111;
  width: 100%;
  margin: 0;
  padding: 0;

  font-family: "JetBrains Mono", "Roboto Mono", monospace;
  font-size: 18px;
  color: #ddd;
}

body,
select,
a:link,
a:visited {
  font-family: inherit;
  color: #ddd;
  text-decoration: none;
}

body {
  padding: 1em;
}

p {
  margin: 0;
}

h1 {
  font: inherit;
  font-size: 2em;
  font-style: italic;
  font-weight: 100;
}

h1::before, h1::after {
  content: "///"
}

strong {
  font-weight: 700;
}

img {
  position: absolute;
  bottom: 2em;
  right: 2em;
  zoom: .5;
}

.cards {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5em;
  margin-top: 1.5em;
}

.card {
  width: 320px;
  background: rgba(255, 255, 255, 0.01);
  border-radius: .2em;
  overflow: hidden;
}

.card video {
  width: 100%;
}

.card div {
  padding: 0.7em 1em;
}

.card.jumbotron {
  font-size: 5em;
  display: flex;
  justify-content: center;
  align-items: center;
}

@media only screen and (max-width:640px){
  .card {
    width: 100%;
  }
}