body {
  font-family: 'Segoe UI', 'Arial', sans-serif;
  max-width: 800px;
  margin: auto;
  padding: 2rem;
  line-height: 1.6;
  background: linear-gradient(120deg, #f9f6ff 0%, #e0e7ff 100%);
  color: #222;
}
nav a {
  margin-right: 1rem;
  text-decoration: none;
  color: #3b82f6;
  font-weight: bold;
  transition: color 0.2s;
}
nav a:hover {
  color: #f59e42;
}
img {
  max-width: 100%;
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(60,60,60,0.08);
}
footer {
  margin-top: 4rem;
  color: #888;
  font-size: 0.9rem;
  text-align: center;
}
header {
  margin-bottom: 2rem;
  text-align: center;
}
h1 {
  color: #f59e42;
  font-size: 2.2rem;
  margin-bottom: 0.5rem;
}
h2 {
  color: #3b82f6;
  font-size: 1.4rem;
  margin-top: 2rem;
}
h3 {
  color: #6366f1;
  font-size: 1.1rem;
  margin-top: 1.2rem;
}
ul, ol {
  margin-left: 1.2rem;
}
@media (max-width: 600px) {
  body {
    padding: 0.5rem;
  }
  h1 {
    font-size: 1.4rem;
  }
  h2 {
    font-size: 1.1rem;
  }
  nav a {
    margin-right: 0.5rem;
  }
}