/* Base layout */
body {
  font-family: 'Segoe UI', Arial, sans-serif;
  background-color: #f7f9fc;
  color: #333;
  max-width: 900px;
  margin: 2rem auto;
  padding: 2rem;
  line-height: 1.7;
}

/* Header styles */
h1 {
  color: #1a237e;
  font-size: 2.4rem;
  margin-bottom: 1rem;
}

h2 {
  color: #283593;
  margin-top: 2rem;
  margin-bottom: 0.8rem;
}

/* Links */
a {
  color: #1565c0;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* Iframe video */
iframe {
  display: block;
  margin: 1.5rem auto;
  box-shadow: 0 0 10px rgba(0,0,0,0.15);
  border: none;
}

/* Images */
img {
  max-width: 100%;
  height: auto;
  border-radius: 6px;
  margin: 1rem 0;
  box-shadow: 0 0 6px rgba(0,0,0,0.1);
}

/* List styling */
ul {
  padding-left: 1.2rem;
}

li {
  margin-bottom: 0.5rem;
}

/* Footer */
footer {
  text-align: center;
  color: #777;
  font-size: 0.9rem;
  margin-top: 4rem;
  padding-top: 1rem;
  border-top: 1px solid #ccc;
}