body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #0B0F1A;
  color: white;
}

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

.sidebar {
  width: 240px;
  background: #0F1425;
  padding: 20px;
}

.sidebar h1 {
  color: #5B6CFF;
  font-size: 20px;
  margin-bottom: 20px;
}

.sidebar nav a {
  display: block;
  color: #ccc;
  text-decoration: none;
  margin: 10px 0;
}

.sidebar nav a:hover {
  color: #5B6CFF;
}

.main {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.topbar {
  background: #0F1425;
  padding: 15px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.topbar button {
  background: #5B6CFF;
  border: none;
  padding: 8px 16px;
  color: white;
  border-radius: 4px;
  cursor: pointer;
}

.cards {
  padding: 20px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.card {
  background: #11162A;
  padding: 30px;
  border-radius: 8px;
  text-align: center;
}