body {
  margin: 0;
  font-family: 'Segoe UI', sans-serif;
  background-color: #f4f4f4;
}

.container {
  display: flex;
  height: 100vh;
}

.sidebar {
  width: 240px;
  background: var(--sidebar-bg, #1e1e2f);
  color: var(--sidebar-text, #fff);
  padding: 20px;
  transition: background 0.4s, color 0.4s;
}

.sidebar h2 {
  margin-top: 0;
}

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

.sidebar li {
  margin: 15px 0;
}


.sidebar a {
  color: var(--sidebar-link, #fff);
  text-decoration: none;
  transition: color 0.3s;
}

.sidebar a:hover {
  text-decoration: underline;
  color: var(--main-color, #00b4ff);
}

.content {
  flex: 1;
  padding: 40px;
  background-color: #fff;
}

header h1 {
  margin-top: 0;
  color: #333;
}