body {
  margin: 0;
  padding: 0;
  font-family: Arial, sans-serif;
  background: #f4f6f9;
}

.header {
  background: #0d6efd;
  color: #fff;
  padding: 15px 25px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.header a {
  color: #fff;
  text-decoration: none;
}

.container {
  display: flex;
}

.sidebar {
  width: 220px;
  min-height: 100vh;
  background: #1e293b;
  color: #fff;
}


.sidebar ul {
  list-style: none;
}

.sidebar li {
  padding: 15px 20px;
  cursor: pointer;
}

.sidebar li:hover {
  background: #334155;
}

.content {
  flex: 1;
  padding: 25px;
}

.cards {
  display: flex;
  margin-top: 20px;
}

.card {
  background: #fff;
  border-radius: 8px;
  width: 200px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}