body {
  margin: 0;
  font-family: system-ui, sans-serif;
  background-color: #ffffff;
  color: #000000;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 20px;
}

h1 {
  text-align: center;
  margin-bottom: 30px;
}

.video-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

iframe {
  width: 100%;
  aspect-ratio: 16/9;
  border: none;
}

@media(min-width: 600px){
  .video-list {
    grid-template-columns: 1fr 1fr;
  }
}