:root{
  --bg:#0f1115; --panel:rgba(20,23,29,.92); --line:#2a2f3a; --txt:#e8ebf1; --muted:#9aa3b2;
  --accent:#4f8cff; --accent2:#22c55e; --danger:#ef4444; --warn:#f59e0b; --info:#3b82f6;
  --radius:14px;
}
*{margin:0;padding:0;box-sizing:border-box}
html,body{height:100%}
body{font-family:Inter,system-ui,Arial,sans-serif;background:var(--bg);color:var(--txt);overflow:hidden}
#canvas-container{position:fixed;inset:0}
#canvas-container canvas{display:block}
#drawing-overlay{position:fixed;inset:0;pointer-events:none;z-index:5;display:none}
#drawing-overlay svg{width:100%;height:100%}
#panel{
  position:fixed;top:14px;left:14px;bottom:14px;width:352px;z-index:10;
  background:var(--panel);backdrop-filter:blur(10px);
  border:1px solid var(--line);border-radius:var(--radius);
  padding:14px 14px 18px;overflow-y:auto;box-shadow:0 12px 40px rgba(0,0,0,.5);
}
#panel h1{font-size:17px;letter-spacing:.2px}
#panel .sub{font-size:12px;color:var(--muted);margin:4px 0 10px}
#panel details{border:1px solid var(--line);border-radius:10px;margin:8px 0;overflow:hidden}
#panel summary{cursor:pointer;padding:9px 11px;font-size:13px;font-weight:700;background:#171b22;list-style:none}
#panel summary::-webkit-details-marker{display:none}
#panel details .body{padding:10px 11px 12px}
.row{margin:9px 0}
.row label{display:flex;justify-content:space-between;font-size:12.5px;color:var(--txt);margin-bottom:5px}
.row label output{color:var(--muted);font-variant-numeric:tabular-nums}
input[type=range]{width:100%;accent-color:var(--accent)}
input[type=color]{width:100%;height:30px;border:1px solid var(--line);border-radius:8px;background:#111}
select{width:100%;padding:8px;border-radius:8px;background:#11151c;color:var(--txt);border:1px solid var(--line)}
.check{display:flex;gap:8px;align-items:center;font-size:13px;margin:7px 0}
.btns{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px}
button{flex:1 1 auto;padding:9px 10px;border:0;border-radius:9px;background:var(--accent);color:#fff;font-weight:700;cursor:pointer;font-size:13px}
button.ghost{background:#2a3040}
button.green{background:var(--accent2)}
button.accent{background:#c56a2d}
button:active{transform:translateY(1px)}
#physics{font-size:13px}
#physics .kpi{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:8px 0}
#physics .card{background:#12161d;border:1px solid var(--line);border-radius:10px;padding:8px}
#physics .card b{display:block;font-size:15px;margin-top:3px}
#physics .card span{font-size:11px;color:var(--muted)}
#warnings{list-style:none;display:grid;gap:6px;margin-top:6px}
#warnings li{font-size:12px;padding:7px 9px;border-radius:8px;border:1px solid var(--line);background:#141922}
#warnings li.warn{border-color:#7c4a03;color:#fcd34d}
#warnings li.danger{border-color:#7f1d1d;color:#fca5a5}
#warnings li.info{border-color:#1e40af;color:#93c5fd}
.flow-grid{display:grid;grid-template-columns:1fr 1fr;gap:7px}
.flow-grid>div{background:#12161d;border:1px solid var(--line);border-radius:8px;padding:7px}
.flow-grid span{display:block;font-size:10px;color:var(--muted)}
.flow-grid b{display:block;font-size:13px;margin-top:3px}
.test-result{margin-top:10px;padding:9px;border-radius:9px;background:#12161d;border:1px solid var(--line);font-size:12px;line-height:1.55}
.test-log{list-style:none;display:grid;gap:6px;margin-top:10px}
.test-log li{font-size:11.5px;padding:7px 9px;border-radius:8px;border:1px solid var(--line);background:#12161d;line-height:1.45;color:#c9d1de}
.test-result strong{color:#86efac}
.test-result .bad{color:#fca5a5}
.optimization-result{margin-top:8px;font-size:12px;line-height:1.45;color:var(--muted)}
.optimization-result strong{color:#fbbf24}
.bom-summary{margin-top:8px;font-size:11.5px;line-height:1.5;color:var(--muted);background:#12161d;border:1px solid var(--line);border-radius:9px;padding:8px}
.bom-summary b{color:#86efac}
.bom-summary .est{color:#f59e0b;font-style:italic}
.bom-summary .bad{color:#fca5a5}
.hint.disclaimer{border-left:3px solid #f59e0b;padding:4px 0 4px 8px}
.auto-summary{margin-top:10px;padding:8px 9px;border-radius:9px;background:#101820;border:1px solid #274;font-size:11.5px;line-height:1.55;color:#c9d1de}
.auto-summary b{color:#86efac}
.room-result{margin-top:9px;padding:8px 9px;border-radius:9px;background:#101820;border:1px solid var(--line);font-size:12px;line-height:1.5;color:#c9d1de}
.room-result b{color:#e8ebf1}
.room-result .ok{color:#86efac}
.room-result .bad{color:#fca5a5}
.calibration-result{margin-top:8px;font-size:11.5px;line-height:1.5;color:var(--muted);background:#12161d;border:1px solid var(--line);border-radius:9px;padding:8px}
.calibration-result b{color:#fbbf24}
.phi-gauge{margin-top:8px;padding:8px 4px 10px;border:1px solid var(--line);border-radius:9px;background:#101820}
.phi-track{position:relative;height:10px;background:#1a1f2a;border-radius:4px;margin:0 8px 6px}
/* Смуга Φ 0.4–0.5 у тій самій мапі, що й маркер у renderPhiGauge: (Φ−0.1)/0.9 → 33.33 %…44.44 % треку */
.phi-band{position:absolute;left:33.33%;right:55.56%;top:0;bottom:0;background:rgba(34,197,94,.4);border-radius:4px}
.phi-marker{position:absolute;top:-3px;width:4px;height:16px;background:#f97316;border-radius:2px;transform:translateX(-2px);transition:left .12s linear}
.phi-label{font-size:11px;color:var(--muted);text-align:center;margin-bottom:2px}
.phi-status{font-size:11.5px;color:#fbbf24;text-align:center}
#tour{position:fixed;inset:0;z-index:50;display:none;align-items:center;justify-content:center;background:rgba(0,0,0,.55)}
#tour .card{max-width:520px;background:#151a23;border:1px solid var(--line);border-radius:14px;padding:18px}
#tour h2{font-size:16px;margin-bottom:8px}
#tour ol{margin:8px 0 12px 18px;font-size:13.5px;line-height:1.55;color:#d5dbe6}
#topbar{position:fixed;top:14px;right:14px;z-index:10;display:flex;gap:8px}
#topbar button{flex:0 0 auto}
#validationList{list-style:none;display:grid;gap:6px}
#validationList li{font-size:12px;padding:7px 9px;border-radius:8px;border:1px solid var(--line);background:#141922}
#validationList li.error{border-color:#991b1b;color:#fecaca}
#validationList li.warning{border-color:#854d0e;color:#fde68a}
#validationList li.ok{border-color:#166534;color:#bbf7d0}
#compareModal{position:fixed;inset:0;z-index:40;display:none;align-items:center;justify-content:center;background:rgba(0,0,0,.62);padding:16px}
#compareModal .card{width:min(620px,100%);max-height:90vh;overflow:auto;background:#151a23;border:1px solid var(--line);border-radius:14px;padding:16px;box-shadow:0 20px 70px rgba(0,0,0,.55)}
.modal-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:12px}
.modal-head h2{font-size:16px}
.compare-table{width:100%;border-collapse:collapse;font-size:13px}
.compare-table th,.compare-table td{border-bottom:1px solid var(--line);padding:8px;text-align:right}
.compare-table th:first-child,.compare-table td:first-child{text-align:left;color:var(--muted)}
.delta-positive{color:#86efac}.delta-negative{color:#fca5a5}
@media (max-width:760px){
  #panel{left:8px;right:8px;top:auto;bottom:8px;width:auto;max-height:46vh}
  #topbar{top:8px;right:8px;left:8px;overflow-x:auto;justify-content:flex-end}
  #topbar button{white-space:nowrap}
}
.hint{font-size:12px;opacity:.85;margin:4px 0}
.hint.ok{color:#86efac}
.hint.warn{color:#fcd34d}