body {
  font-family: 'Malgun Gothic', sans-serif;
  margin: 0;
  background: #f0f2f5;
}
.main-layout {
  display: flex;
}
#sidebar-container {
  width: 250px;
  background: #1a237e;
  color: white;
  min-height: 100vh;
}
#content-container {
  flex: 1;
  padding: 30px;
}
h1, h2 {
  color: #1976d2;
}
a {
  color: #1976d2;
  text-decoration: none;
}