body {
  font-family: system-ui, sans-serif;
  background: #f9fafb;
  margin: 0;
  padding: 0;
}
.navbar {
  background: #111827;
  color: white;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.navbar a { color: #a5b4fc; margin-left: 1rem; text-decoration: none; }
.cards {
  display: flex;
  gap: 1rem;
  padding: 2rem;
}
.card {
  flex: 1;
  background: white;
  padding: 1.5rem;
  border-radius: 1rem;
  box-shadow: 0 4px 6px rgba(0,0,0,0.1);
  text-align: center;
}
.chart-container { padding: 2rem; }
.table {
  width: 90%;
  margin: 2rem auto;
  border-collapse: collapse;
  background: white;
  border-radius: 0.5rem;
  overflow: hidden;
}
.table th, .table td {
  padding: 1rem;
  border-bottom: 1px solid #e5e7eb;
}
.table th {
  background: #f3f4f6;
  text-align: left;
}