:root{
  --bg:#08080f;
  --panel:rgba(255,255,255,.045);
  --panel-2:rgba(255,255,255,.075);
  --line:rgba(205,216,235,.14);
  --line-2:rgba(205,216,235,.30);
  --text:#eef1f6;
  --text-2:#aab4c4;
  --text-3:#717d90;
  --text-4:#4a5468;
  --accent:#6a6ff0;
  --red:#ef4a4a;
  --green:#3ecb6e;
  --blue:#4a86f5;
  --sans:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;
  --serif:'Instrument Serif',Georgia,'Times New Roman',serif;
  --mono:'IBM Plex Mono',ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*{margin:0;padding:0;box-sizing:border-box}
[hidden]{display:none !important}
body.boot *{transition:none !important; animation:none !important}
html,body{height:100%}
body{
  background:var(--bg); color:var(--text); font-family:var(--sans);
  -webkit-font-smoothing:antialiased;
  background-image:radial-gradient(130% 95% at 50% -8%, #171022 0%, #0b0b15 52%, #050508 100%);
  background-attachment:fixed;
}
:focus-visible{outline:2px solid var(--accent); outline-offset:2px; border-radius:6px}
button{font-family:inherit; color:inherit; background:none; border:none}

.page{display:flex; flex-direction:column; min-height:100vh}

/* ---------- top bar ---------- */
.bar{
  display:flex; justify-content:space-between; align-items:center; gap:12px;
  padding:max(14px, env(safe-area-inset-top)) 20px 0; flex:none;
}
.home,.icon{
  display:inline-flex; align-items:center; gap:7px; height:38px;
  color:var(--text); text-decoration:none; font:500 14px/1 var(--sans);
  background:var(--panel); border:1px solid var(--line); border-radius:999px;
  cursor:pointer; transition:background .15s, border-color .15s;
}
.home{padding:0 14px 0 10px}
.home span{font-family:var(--serif); font-size:18px; letter-spacing:.01em}
.icon{width:38px; justify-content:center; padding:0}
.home:hover,.icon:hover{background:var(--panel-2); border-color:var(--line-2)}

/* ---------- layout ---------- */
main{
  flex:1; display:grid; grid-template-columns:minmax(0,1fr) 322px;
  gap:24px; padding:10px 20px max(22px, env(safe-area-inset-bottom));
  align-items:start; align-content:start;
  width:100%; max-width:1128px; margin:0 auto;
}
.stage{display:flex; flex-direction:column; gap:12px; min-width:0}
.titleblock{max-width:680px; padding:6px 2px 2px}
.kicker{font-size:11.5px; font-weight:600; letter-spacing:.15em; text-transform:uppercase; color:var(--text-3)}
h1{
  font-family:var(--serif); font-weight:400; font-size:clamp(34px, 4.4vw, 58px);
  line-height:.98; letter-spacing:-.01em; margin:4px 0 8px;
}
.sub{font-size:14.5px; line-height:1.55; color:var(--text-2); max-width:66ch}
.sub b{font-weight:600; color:var(--text)}
.lbl{
  font-size:11px; font-weight:600; letter-spacing:.12em; text-transform:uppercase;
  color:var(--text-3); display:flex; justify-content:space-between; align-items:baseline; gap:8px;
}
.lbl .hint{
  font:600 11px/1 var(--mono); letter-spacing:.02em; text-transform:none; color:var(--accent);
}
.srlive{position:absolute; width:1px; height:1px; overflow:hidden; clip:rect(0 0 0 0); white-space:nowrap}

/* ---------- the scene ---------- */
.slate{
  position:relative; width:100%; overflow:hidden; border-radius:14px;
  background:#05070b; border:1px solid rgba(205,216,235,.12);
  box-shadow:0 22px 46px -30px #000, 0 1px 0 rgba(224,236,200,.06) inset;
  isolation:isolate;
}
#scene{display:block; width:100%; aspect-ratio:16/9; height:auto; cursor:grab; touch-action:none}
#scene:active{cursor:grabbing}
.dragHint{
  position:absolute; left:50%; bottom:12px; transform:translateX(-50%);
  font:600 11px/1 var(--sans); letter-spacing:.06em; text-transform:uppercase;
  color:rgba(238,241,246,.7); background:rgba(5,7,11,.55); border:1px solid var(--line);
  padding:6px 12px; border-radius:999px; pointer-events:none; transition:opacity .4s;
}
.dragHint.gone{opacity:0}

/* ---------- panel ---------- */
.panel{
  display:flex; flex-direction:column; gap:14px; position:sticky; top:12px;
  background:var(--panel); border:1px solid var(--line); border-radius:16px;
  padding:14px 15px 13px;
}
.grp{display:flex; flex-direction:column; gap:8px}
.note{font-size:11.5px; line-height:1.5; color:var(--text-3)}
.note i{color:var(--text-2); font-style:italic}

.readout{
  border-radius:11px; padding:10px 12px; border:1px solid var(--line);
  background:var(--panel-2); font-size:12.5px; line-height:1.5; color:var(--text-2);
}
.readout .big{
  display:block; font:400 25px/1.1 var(--mono); color:var(--text); margin-bottom:4px;
  letter-spacing:.01em;
}
.readout .dim{color:var(--text-3); font-size:12px}

.meters{display:flex; flex-direction:column; gap:7px; padding:2px 2px 0}
.meter{display:grid; grid-template-columns:62px 1fr 30px; align-items:center; gap:8px}
.mlbl{font:500 11.5px/1 var(--sans); color:var(--text-3)}
.mtrack{height:9px; border-radius:99px; background:rgba(255,255,255,.08); overflow:hidden}
.mfill{height:100%; width:0%; border-radius:99px; transition:width .12s linear}
.meter[data-ch="r"] .mfill{background:var(--red)}
.meter[data-ch="g"] .mfill{background:var(--green)}
.meter[data-ch="b"] .mfill{background:var(--blue)}
.mval{font:600 11.5px/1 var(--mono); color:var(--text-2); text-align:right}

input[type=range]{
  -webkit-appearance:none; appearance:none; width:100%; height:26px;
  background:transparent; cursor:pointer; display:block;
}
input[type=range]::-webkit-slider-runnable-track{
  height:5px; border-radius:99px; background:rgba(255,255,255,.13);
}
input[type=range]::-moz-range-track{height:5px; border-radius:99px; background:rgba(255,255,255,.13)}
input[type=range]::-webkit-slider-thumb{
  -webkit-appearance:none; appearance:none; width:19px; height:19px; margin-top:-7px;
  border-radius:50%; background:var(--accent); border:none;
  box-shadow:0 1px 5px rgba(0,0,0,.5), 0 0 0 1px rgba(0,0,0,.25);
}
input[type=range]::-moz-range-thumb{
  width:19px; height:19px; border-radius:50%; background:var(--accent); border:none;
  box-shadow:0 1px 5px rgba(0,0,0,.5);
}

.seg{display:flex; gap:4px; background:rgba(255,255,255,.04); border:1px solid var(--line); border-radius:11px; padding:3px}
.segbtn{
  flex:1; text-align:center; padding:7px 4px; border-radius:8px; cursor:pointer;
  font:600 11px/1.25 var(--sans); color:var(--text-3); transition:background .14s, color .14s;
}
.segbtn:hover{color:var(--text-2)}
.segbtn.on{background:rgba(106,111,240,.26); color:#e2e3ff}

.mixrow{display:grid; grid-template-columns:18px 1fr 32px; align-items:center; gap:9px}
.mixlbl{font:700 12px/1 var(--mono); text-align:center}
.mixlbl.r{color:var(--red)} .mixlbl.g{color:var(--green)} .mixlbl.b{color:var(--blue)}
.mixrow[data-ch="r"] input[type=range]::-webkit-slider-thumb{background:var(--red)}
.mixrow[data-ch="g"] input[type=range]::-webkit-slider-thumb{background:var(--green)}
.mixrow[data-ch="b"] input[type=range]::-webkit-slider-thumb{background:var(--blue)}
.mixrow[data-ch="r"] input[type=range]::-moz-range-thumb{background:var(--red)}
.mixrow[data-ch="g"] input[type=range]::-moz-range-thumb{background:var(--green)}
.mixrow[data-ch="b"] input[type=range]::-moz-range-thumb{background:var(--blue)}
.mixnum{font:600 11.5px/1 var(--mono); color:var(--text-2); text-align:right}

.foot{
  font-size:11.5px; line-height:1.6; color:#a7b0c2;
  border-top:1px solid var(--line); padding-top:12px;
}
.link{
  color:var(--accent); cursor:pointer; font:inherit; font-weight:600; text-align:left;
  text-decoration:underline; text-underline-offset:2px;
}
.link:hover{color:#9598f5}

/* ---------- about ---------- */
dialog{
  border:none; padding:0; background:transparent; max-width:min(706px, 92vw);
  max-height:86vh; margin:auto;
}
dialog::backdrop{background:rgba(5,7,12,.68); backdrop-filter:blur(3px)}
.about{
  position:relative; background:#0c0c1a; border:1px solid rgba(205,216,235,.2);
  border-radius:18px; padding:26px 28px 24px; overflow-y:auto; max-height:86vh;
  box-shadow:0 30px 60px -28px #000;
}
.about h2{
  font-family:var(--serif); font-weight:400; font-size:31px; line-height:1.05;
  margin:4px 0 14px; color:var(--text);
}
.about h3{
  font-family:var(--serif); font-weight:400; font-size:22px; line-height:1.1;
  margin:22px 0 10px; color:var(--text);
}
.about p{font-size:14.5px; line-height:1.68; color:var(--text-2); margin-bottom:12px}
.about p b{color:var(--text); font-weight:600}
.about em,.about i{font-style:italic}
.about .fine{
  font-size:12.5px; color:var(--text-3); border-top:1px solid var(--line);
  padding-top:12px; margin-top:16px; margin-bottom:0;
}
.x{
  position:absolute; top:14px; right:14px; width:32px; height:32px; cursor:pointer;
  display:flex; align-items:center; justify-content:center; color:var(--text-3);
  background:var(--panel-2); border:1px solid var(--line); border-radius:999px;
}
.x:hover{color:var(--text); border-color:var(--line-2)}

/* ---------- narrow ---------- */
@media (max-width:920px){
  main{grid-template-columns:minmax(0,1fr); gap:16px; padding:8px 14px max(20px, env(safe-area-inset-bottom))}
  .panel{position:static}
  h1{font-size:clamp(30px, 8.6vw, 42px)}
  .sub{font-size:14px}
  .about{padding:22px 20px 20px; border-radius:15px}
  .about h2{font-size:26px}
  .about h3{font-size:20px}
}
@media (max-width:420px){
  .readout .big{font-size:21px}
  .dragHint{font-size:10px; padding:5px 10px}
}
@media (prefers-reduced-motion: reduce){
  .dragHint, .mfill{transition:none}
}