body {
  background-color: #0e0e0e;
  color: white;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  margin: 0; padding: 0;
}
header {
  background: #121212; padding: 15px; border-bottom: 1px solid #333;
  text-align: center;
}
header h1 { margin: 0; font-size: 28px; }
.top-controls { display:flex; justify-content:space-between; align-items:center; margin:10px 20px; }
.selectors { display:flex; gap:10px; align-items:center; }
.selectors label { font-size:14px; }
#dataStatus { font-size:14px; }
#clockBox { font-size:16px; font-weight:bold; }
.charts-container {
  display:grid; grid-template-columns:1fr 1fr; grid-gap:20px; padding:20px;
}
.chart-box, .stat-table-box {
  background:#1e1e1e; border-radius:8px; padding:15px; box-shadow:0 0 10px rgba(0,0,0,0.5);
}
.chart-box h2, .stat-table-box h2 { margin-top:0; font-size:18px; }
#statsTable {
  display:grid; grid-template-columns:repeat(auto-fit,minmax(120px,1fr)); gap:10px; margin-top:10px;
}
.stat-cell {
  background:#2a2a2a; border-radius:4px; padding:10px; text-align:center;
}
.stat-name { font-size:12px; color:#aaa; }
.stat-val { font-size:16px; font-weight:bold; }
.csv-upload { margin-top:15px; text-align:center; }
.csv-upload input { margin-bottom:10px; }
@media (max-width: 768px) {
  .charts-container { grid-template-columns:1fr; }
}