body {
  font-family: sans-serif;
  background: #f4f4f4;
  color: #333;
  margin: 0; padding: 0;
}
header {
  background: #2c3e50; color: #fff;
  text-align: center; padding: 20px;
}
main { max-width: 800px; margin: 20px auto; padding: 0 10px; }
section {
  background: #fff;
  margin-bottom: 20px;
  padding: 15px;
  border-radius: 6px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}
h2 { color: #2980b9; }
img {
  display: block;
  max-width: 100%;
  margin: 15px auto;
  border: 1px solid #ddd;
}
footer {
  text-align: center;
  padding: 15px;
  background: #ecf0f1;
  font-size: 14px;
}
a { color: #2980b9; text-decoration: none; }
a:hover { text-decoration: underline; }