body {
  font-family: sans-serif;
  background-color: #f4f4f4;
  margin: 0;
  padding: 0;
}

.container {
  max-width: 960px;
  margin: auto;
  padding: 2rem;
  text-align: center;
}

h1 {
  font-size: 2rem;
  margin-bottom: 2rem;
}

.video-grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.video iframe {
  width: 100%;
  height: 315px;
  border-radius: 8px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}