body {
  margin: 0;
  font-family: Arial, sans-serif;
  color: #222;
  background: #f7f7f7;
}

header, footer {
  padding: 20px;
  text-align: center;
  background: #ffffff;
  border-bottom: 1px solid #eee;
}

#content {
  padding: 40px;
  max-width: 900px;
  margin: auto;
  background: white;
  border-radius: 10px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

img {
  max-width: 100%;
  border-radius: 10px;
}