body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

header {
  background-color: #f1f2f3;
  padding: 20px;
  text-align: center;
  border-bottom: 1px solid #ddd;
}

.container {
  display: flex;
  flex: 1;
}

nav.sidebar {
  width: 250px;
  background-color: #f9f9f9;
  border-right: 1px solid #ddd;
  padding: 20px;
}

nav.sidebar ul {
  list-style: none;
  padding: 0;
}

nav.sidebar li {
  margin-bottom: 10px;
}

nav.sidebar a {
  text-decoration: none;
  color: #333;
}

nav.sidebar a:hover {
  text-decoration: underline;
}

main.content {
  flex: 1;
  padding: 20px;
  overflow-x: auto;
}

main.content img {
  max-width: 100%;
  height: auto;
}