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

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

.sidebar {
  width: 240px;
  background: #0f172a;
  color: white;
  padding: 20px;
}

.logo {
  margin-bottom: 40px;
}

.sidebar nav a {
  display: block;
  padding: 12px;
  margin-bottom: 10px;
  text-decoration: none;
  color: white;
  border-radius: 8px;
}

.sidebar nav a:hover {
  background: #1e293b;
}

.main {
  flex: 1;
  padding: 40px;
  overflow-y: auto;
}

.section {
  display: none;
}

.section.active {
  display: block;
}

.kpi-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 30px;
}

.card {
  background: white;
  padding: 25px;
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.05);
}

.card h3 {
  margin: 0;
  font-size: 16px;
  color: #64748b;
}

.card p {
  font-size: 28px;
  margin-top: 10px;
  font-weight: bold;
}

.chart-card {
  background: white;
  padding: 30px;
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.05);
}

.data-table {
  width: 100%;
  background: white;
  border-collapse: collapse;
  border-radius: 12px;
  overflow: hidden;
}

.data-table th {
  background: #f1f5f9;
  text-align: left;
  padding: 15px;
}

.data-table td {
  padding: 15px;
  border-top: 1px solid #e2e8f0;
}

.rfq-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px,1fr));
  gap: 20px;
}

.rfq-card {
  background: white;
  padding: 20px;
  border-radius: 12px;
  box-shadow: 0 4px 15px rgba(0,0,0,0.05);
}

.btn-primary {
  background: #2563eb;
  border: none;
  padding: 10px 16px;
  color: white;
  border-radius: 8px;
  cursor: pointer;
}

.btn-primary:hover {
  background: #1e40af;
}