/* Mobile-First Base Styles */
body {
  font-family: Arial, sans-serif;
  margin: 0;
  line-height: 1.6;
  background: #f8f8f8;
  color: #333;
}

header {
  background: #6b4eff;
  color: white;
  padding: 2rem 1rem;
  text-align: center;
}

nav ul {
  display: flex;
  flex-direction: column;
  list-style: none;
  padding: 0;
  margin: 0;
  background: #fff;
}

nav li {
  border-bottom: 1px solid #ddd;
}

nav a {
  display: block;
  padding: 1rem;
  text-decoration: none;
  color: #6b4eff;
  font-weight: bold;
  text-align: center;
}

nav a:hover {
  background: #6b4eff;
  color: white;
}

section {
  padding: 2rem 1rem;
  max-width: 900px;
  margin: 1rem auto;
  background: white;
  border-radius: 8px;
}

h2 {
  color: #6b4eff;
  margin-top: 0;
}

iframe {
  border-radius: 8px;
  width: 100%;
}

footer {
  text-align: center;
  padding: 1rem;
  background: #eee;
}

/* Tablet / Larger Screens */
@media (min-width: 768px) {
  nav ul {
    flex-direction: row;
    justify-content: center;
  }

  nav li {
    border-bottom: none;
    border-right: 1px solid #ddd;
  }

  nav li:last-child {
    border-right: none;
  }

  nav a {
    padding: 1rem 2rem;
  }
}