body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #f5f7fa;
  display: flex;
}

.sidebar {
  width: 230px;
  background: linear-gradient(180deg, #007bff, #1e90ff);
  color: #fff;
  height: 100vh;
  padding: 20px 0;
  position: fixed;
}

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

.sidebar ul li {
  padding: 15px 20px;
}

.main {
  margin-left: 230px;
  padding: 30px;
  width: calc(100% - 230px);
}

.welcome {
  font-size: 24px;
  font-weight: 600;
  margin-bottom: 20px;
}

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

.card {
  background: linear-gradient(135deg, #4da3ff, #1e7bf7);
  padding: 25px;
  width: 250px;
  border-radius: 12px;
  color: white;
  text-align: center;
}