:root { --bg:#0f1220; --panel:#151a2f; --text:#e6eaf2; --muted:#94a3b8; --accent:#6ee7b7; --danger:#ef4444; --btn:#1f2937; --border:#273054; }
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--text);font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Ubuntu}
.app-header,.app-footer{text-align:center;padding:16px;border-bottom:1px solid var(--border)}
.app-footer{border-top:1px solid var(--border);border-bottom:none;color:var(--muted)}
.container{max-width:1100px;margin:24px auto;padding:0 16px;display:grid;grid-template-columns:1fr 1fr;grid-gap:16px}
.panel{background:var(--panel);border:1px solid var(--border);border-radius:16px;padding:16px}
.panel h2{margin-top:0}
.grid{display:grid;grid-gap:12px}
.grid-2{grid-template-columns:1fr 1fr}
label{display:flex;flex-direction:column;gap:6px;font-size:14px;color:var(--muted)}
input,select{padding:10px;border-radius:10px;border:1px solid var(--border);background:#0c1020;color:var(--text)}
.row{display:flex;gap:8px;align-items:center}
.btn{background:var(--btn);color:var(--text);border:1px solid var(--border);padding:10px 14px;border-radius:12px;cursor:pointer}
.btn:hover{filter:brightness(1.15)}
.btn-danger{background:var(--danger);color:#fff;border:none}
.controls{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.canvas-wrap{position:relative}
#gridCanvas{width:100%;height:auto;background:#060913;border-radius:12px;border:1px solid var(--border);image-rendering:pixelated}
#overlayCanvas{position:absolute;left:0;top:0;width:100%;height:100%;pointer-events:none}
.stats{margin-top:8px;display:flex;gap:16px;color:var(--muted)}
.metrics{margin-top:8px;display:flex;gap:16px;color:var(--muted);flex-wrap:wrap}

/* Charts live */
.charts-live{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:12px}
.chart-card{background:#0c1020;border:1px solid var(--border);border-radius:12px;padding:10px}
.chart-head{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:6px}
.chart-head h3{font-size:14px;margin:0}
.chart-head .muted{font-size:12px}
#chartX,#chartY{width:100%;height:auto;display:block}

/* Export/TAN */
.export{margin-top:12px;display:flex;gap:12px;align-items:center}
.tan-out{background:#0c1020;border:1px solid var(--border);border-radius:12px;padding:8px;max-height:200px;overflow:auto;color:var(--accent)}
.muted{color:var(--muted);display:block;margin-top:6px}

@media (max-width:920px){
  .container{grid-template-columns:1fr}
  .charts-live{grid-template-columns:1fr}
}