/* Basic reset and theme */
:root{
  --bg:#0e1117;
  --panel:#161b22;
  --muted:#8b949e;
  --text:#c9d1d9;
  --accent:#58a6ff;
  --accent-2:#2ea043;
  --warn:#d29922;
  --danger:#f85149;
  --border:#30363d;
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font:14px/1.4 system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,Noto Sans,sans-serif;
}

.header{
  position:sticky;top:0;z-index:10;
  background:linear-gradient(180deg,var(--panel),rgba(22,27,34,0.8));
  backdrop-filter:saturate(1.2) blur(6px);
  border-bottom:1px solid var(--border);
  padding:16px 20px;
}
.header h1{margin:0 0 10px;font-size:20px}
.filters{display:flex;gap:12px;align-items:center;flex-wrap:wrap}
.filters label{display:flex;gap:6px;align-items:center;color:var(--muted)}
select,input[type="number"]{
  background:var(--panel);
  color:var(--text);
  border:1px solid var(--border);
  border-radius:6px;
  padding:6px 8px;
}
.btn{
  border:1px solid var(--border);
  background:var(--accent);
  color:#081018;
  padding:8px 12px;
  border-radius:6px;
  cursor:pointer;
}
.btn:disabled{opacity:.6;cursor:progress}
.status{color:var(--muted);margin-left:6px}

.content{padding:20px;max-width:1300px;margin:0 auto}

.summary-cards{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:20px}
.card{
  background:var(--panel);
  border:1px solid var(--border);
  border-radius:10px;
  padding:14px;
}
.card-title{color:var(--muted);font-size:12px;text-transform:uppercase;letter-spacing:.06em}
.card-value{font-size:28px;margin-top:6px}

.charts-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:16px;
}
.chart-card{
  background:var(--panel);
  border:1px solid var(--border);
  border-radius:10px;
  padding:14px;
}
.chart-card.wide{grid-column:1/-1}
.chart-title{color:var(--muted);margin-bottom:8px}

.table-section{margin-top:22px}
.table-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}
.table-title{color:var(--muted)}
.table-wrapper{
  background:var(--panel);
  border:1px solid var(--border);
  border-radius:10px;
  overflow:auto;
}
#previewTable{width:100%;border-collapse:collapse}
#previewTable th,#previewTable td{padding:8px 10px;border-bottom:1px solid var(--border);white-space:nowrap}
#previewTable thead th{position:sticky;top:0;background:var(--panel);z-index:1}
#previewTable tbody tr:nth-child(odd){background:rgba(255,255,255,0.02)}

.footer{
  padding:18px 20px;
  color:var(--muted);
  border-top:1px solid var(--border);
  margin-top:28px;
}

@media (max-width: 900px){
  .summary-cards{grid-template-columns:repeat(2,1fr)}
  .charts-grid{grid-template-columns:1fr}
}