main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
}

main h1 {
  font-size: 3rem;
  font-weight: bold;
  margin-bottom: 2rem;
  text-align: center;
  color: var(--kosen-blue);
}

main > p {
  font-size: 1.125rem;
  margin-bottom: 2rem;
  text-align: center;
  color: var(--muted-foreground);
}

main ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

main ul li {
  background-color: var(--card);
  padding: 1.5rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  font-size: 1rem;
  line-height: 1.8;
}

main ul li b {
  color: var(--kosen-blue);
  font-size: 1.25rem;
  display: block;
  margin-bottom: 0.5rem;
}

main ul li a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.2s ease;
}

main ul li a:hover {
  color: var(--kosen-orange);
  text-decoration: underline;
}

main iframe {
  width: 100%;
  height: 400px;
  border-radius: var(--radius);
  border: 0;
  margin: 1rem 0;
}

/* Responsive design */
@media (max-width: 768px) {
  main {
    padding: 1rem;
  }

  main h1 {
    font-size: 2rem;
  }

  main > p {
    font-size: 1rem;
  }

  main ul li {
    padding: 1rem;
  }

  main ul li b {
    font-size: 1.125rem;
  }

  main iframe {
    height: 300px;
  }
}

@media (max-width: 480px) {
  main h1 {
    font-size: 1.75rem;
  }

  main > p {
    font-size: 0.9375rem;
  }

  main ul {
    gap: 1rem;
  }

  main ul li {
    padding: 0.875rem;
    font-size: 0.9375rem;
  }

  main ul li b {
    font-size: 1rem;
  }

  main iframe {
    height: 250px;
  }
}