body {
  background: #f8f9fa;
}

.sidebar {
  width: 100%;
  height: 100vh;
  position: fixed;
  background: #fff;
  border-right: 1px solid #eee;
}

.sidebar a {
  display: block;
  padding: 10px;
  color: #555;
  border-radius: 8px;
  text-decoration: none;
}

.sidebar a:hover {
  background: #f1f1f1;
}

.main-content {
  padding: 20px;
}

.card-modern {
  border: none;
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}