:root{
  --bg:#0b0e14; --fg:#e6e6e6; --muted:#b9c0cf; --card:#11151d; --accent:#7cc0ff;
  --good:#2ecc71; --warn:#f1c40f; --bad:#e74c3c; --line:#1c2433;
}
*{box-sizing:border-box}
body{margin:0;font:16px/1.4 system-ui,Segoe UI,Roboto,Ubuntu,sans-serif;background:var(--bg);color:var(--fg)}
.topbar{display:flex;justify-content:space-between;align-items:center;padding:12px 16px;background:#0f1420;border-bottom:1px solid var(--line)}
h1{font-size:20px;margin:0} h1 small{opacity:.7;font-weight:400}
.grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;padding:16px}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px;box-shadow:0 6px 18px rgba(0,0,0,.25)}
.card h2{margin:.2rem 0 1rem;font-size:18px}
.row{display:flex;gap:12px;flex-wrap:wrap}
.field{display:flex;flex-direction:column;gap:6px;min-width:180px}
.field.grow{flex:1}
input[type="text"],input[type="number"],select{background:#0d1320;border:1px solid var(--line);border-radius:8px;padding:10px;color:var(--fg)}
input[type="range"]{width:100%}
output{display:inline-block;min-width:40px;text-align:right}
.switch{position:relative;display:inline-block;width:54px;height:28px;margin-bottom:10px}
.switch input{opacity:0;width:0;height:0}
.slider{position:absolute;cursor:pointer;top:0;left:0;right:0;bottom:0;background:#3a4153;transition:.2s;border-radius:28px}
.slider:before{position:absolute;content:"";height:22px;width:22px;left:3px;bottom:3px;background:white;transition:.2s;border-radius:50%}
.switch input:checked + .slider{background:var(--good)}
.switch input:checked + .slider:before{transform:translateX(26px)}
.actions{display:flex;gap:10px;margin-top:12px;flex-wrap:wrap}
button{background:var(--accent);color:#000;padding:10px 14px;border:0;border-radius:10px;cursor:pointer;font-weight:600}
button:disabled{opacity:.5;cursor:not-allowed}
.fold{margin-top:10px;border-top:1px dashed var(--line);padding-top:10px}
.modes label{margin-right:12px}
.status{display:flex;align-items:center;gap:8px}
.led{width:10px;height:10px;border-radius:50%;display:inline-block}
.led-gray{background:#738}
.led-green{background:var(--good)}
.led-red{background:var(--bad)}
.testbar{display:flex;gap:8px;margin:10px 0;flex-wrap:wrap}
.tv{background:#8fd18f}
.logwrap{border:1px solid var(--line);border-radius:10px;overflow:hidden;background:#0a0f18}
.log{margin:0;padding:10px;height:260px;overflow:auto;font-family:ui-monospace,Menlo,monospace;background:#0a0f18;color:var(--muted)}
.code{white-space:pre-wrap;background:#0b101a;padding:10px;border-radius:10px;border:1px solid var(--line)}
.span2{grid-column:1 / span 2}
.foot{padding:10px 16px;color:var(--muted);border-top:1px solid var(--line)}
@media (max-width:980px){.grid{grid-template-columns:1fr} .span2{grid-column:auto}}