body {
  margin: 0;
  padding: 0;
  overflow: hidden;
  font-family: sans-serif;
}
#bg-video {
  position: fixed;
  top: 0; left: 0;
  width: 100vw;
  height: 100vh;
  object-fit: cover;
  z-index: -1;
}
#card-buttons {
  position: absolute;
  bottom: 15%;
  width: 100%;
  text-align: center;
}
.card {
  display: inline-block;
  background: rgba(255,255,255,0.1);
  border: 2px solid white;
  padding: 30px 60px;
  margin: 20px;
  font-size: 24px;
  color: white;
  text-decoration: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.card:hover {
  transform: scale(1.1);
  box-shadow: 0 0 20px white;
}
#subtitle {
  position: absolute;
  top: 10%;
  width: 100%;
  text-align: center;
  font-size: 36px;
  color: white;
  text-shadow: 0 0 10px black;
}