*{box-sizing:border-box;margin:0;padding:0;}
  :root{
    --bg:#101012; --chassis:#1d1e22; --chassis-hi:#28292f; --chassis-lo:#141518;
    --cyan:#35d0ba; --cyan-dim:#14443d; --red:#ff4d4d; --green:#2ecc71;
    --text:#d6d8dc; --dim:#6e7178; --oled-bg:#050505; --oled-fg:#e8e8e8;
  }
  body{background:radial-gradient(1100px 700px at 50% -10%,#26272c 0%,var(--bg) 60%,#0a0b0c 100%);min-height:100vh;
    font-family:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;color:var(--text);display:flex;align-items:flex-start;justify-content:center;padding:28px 14px 80px;}
  .chassis{width:1100px;max-width:100%;background:linear-gradient(160deg,var(--chassis-hi),var(--chassis) 45%,var(--chassis-lo));
    border-radius:20px;padding:24px 26px 20px;border:1px solid #3a3b40;box-shadow:0 28px 55px rgba(0,0,0,.55),inset 0 1px 0 rgba(255,255,255,.07);position:relative;}
  .brand{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:14px;}
  .brand h1{font-size:15px;letter-spacing:3px;color:#fff;font-weight:800;}
  .brand h1 span{color:var(--cyan);}
  .brand .sub{font-size:10px;letter-spacing:2px;color:var(--dim);text-transform:uppercase;}
  #oled{background:var(--oled-bg);border-radius:10px;padding:12px 14px;min-height:96px;margin-bottom:16px;
    font-family:"SF Mono",Menlo,Consolas,monospace;font-size:13px;line-height:1.55;color:var(--oled-fg);
    border:1px solid #000;box-shadow:inset 0 0 18px rgba(0,0,0,.9);white-space:pre;position:relative;overflow:hidden;}
  #oled::after{content:"";position:absolute;inset:0;pointer-events:none;background:repeating-linear-gradient(0deg,rgba(255,255,255,.03) 0 1px,transparent 1px 2px);}
  .ctrl{display:flex;gap:14px;flex-wrap:wrap;align-items:flex-start;margin-bottom:16px;}
  .section{background:#17181b;border-radius:10px;border:1px solid #000;padding:12px 14px;}
  .sec-title{font-size:9px;letter-spacing:2px;color:var(--dim);text-transform:uppercase;margin-bottom:8px;}
  .knob-wrap{display:flex;flex-direction:column;align-items:center;gap:2px;}
  .knob{width:50px;height:50px;border-radius:50%;position:relative;cursor:ns-resize;
    background:radial-gradient(circle at 35% 30%,#3d4046,#202125 65%,#121316);box-shadow:0 3px 6px rgba(0,0,0,.6),inset 0 1px 1px rgba(255,255,255,.2);}
  .knob::before{content:"";position:absolute;top:3px;left:50%;width:3px;height:16px;margin-left:-1.5px;border-radius:2px;background:var(--cyan);box-shadow:0 0 5px rgba(53,208,186,.55);transform-origin:50% 23px;}
  .knob-label{font-size:8px;letter-spacing:1px;color:var(--dim);text-transform:uppercase;}
  .knob-val{font-size:10px;font-family:"SF Mono",Menlo,monospace;color:var(--cyan);min-height:12px;}
  .btn{background:linear-gradient(180deg,#2c2e33,#1b1d21);border:1px solid #3c3e44;color:var(--text);border-radius:7px;padding:6px 10px;font-size:10px;letter-spacing:1px;cursor:pointer;text-transform:uppercase;font-weight:600;}
  .btn:hover{filter:brightness(1.15);} .btn:active{transform:translateY(1px);}
  .btn.on{background:linear-gradient(180deg,#35d0ba,#1d8a7a);color:#06231f;border-color:#5ce1d0;}
  .btn.red{background:linear-gradient(180deg,#ff5c4d,#d62f20);color:#2b0d00;}
  .keys{display:flex;gap:3px;margin-bottom:16px;padding:12px;background:#17181b;border-radius:10px;border:1px solid #000;overflow-x:auto;}
  .key{flex:1;min-width:26px;height:110px;border-radius:6px;cursor:pointer;position:relative;
    background:linear-gradient(180deg,#f5f5f5,#c9c9cf 80%,#a9a9b0);border:1px solid #000;
    box-shadow:inset 0 -6px 10px rgba(0,0,0,.25), 0 3px 5px rgba(0,0,0,.4);transition:transform .03s;}
  .key.black{background:linear-gradient(180deg,#33343a,#191a1e 80%,#0d0e11);}
  .key .kname{position:absolute;bottom:5px;left:50%;transform:translateX(-50%);font-size:8px;color:#555;font-weight:700;}
  .key.black .kname{color:#888;}
  .key.down{transform:translateY(3px);box-shadow:inset 0 2px 8px rgba(0,0,0,.4);filter:brightness(1.15);}
  .key .led{position:absolute;top:4px;left:50%;transform:translateX(-50%);width:5px;height:5px;border-radius:50%;background:#222;box-shadow:0 0 4px rgba(0,0,0,.5);}
  .key.held .led{background:var(--green);box-shadow:0 0 6px var(--green);}
  .seq-row{display:flex;gap:4px;margin-bottom:14px;padding:12px;background:#17181b;border-radius:10px;border:1px solid #000;flex-wrap:wrap;align-items:center;}
  .step{width:34px;height:30px;border-radius:5px;background:linear-gradient(180deg,#232428,#141517);border:1px solid #3a3b40;cursor:pointer;
    display:flex;align-items:center;justify-content:center;font-size:9px;color:#565a60;font-family:"SF Mono",Menlo,monospace;position:relative;}
  .step.on{background:linear-gradient(180deg,#35d0ba,#1d8a7a);color:#06231f;border-color:#5ce1d0;}
  .step.cur{outline:1px dashed var(--green);outline-offset:-1px;}
  .step.rat::after{content:"";position:absolute;top:3px;right:3px;width:4px;height:4px;border-radius:50%;background:#fff;}
  .touchstrip{height:44px;border-radius:8px;background:linear-gradient(180deg,#2a2b30,#151619);border:1px solid #000;margin-bottom:16px;position:relative;cursor:crosshair;overflow:hidden;}
  .touchstrip .bar{position:absolute;top:0;bottom:0;background:rgba(53,208,186,.18);border-left:2px solid var(--cyan);}
  .touchstrip .lbl{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);font-size:9px;letter-spacing:2px;color:var(--dim);text-transform:uppercase;}
  .footer{display:flex;gap:10px;flex-wrap:wrap;align-items:center;padding-top:6px;}
  .hint{font-size:10px;color:var(--dim);margin-left:auto;text-align:right;line-height:1.6;}
  .status{font-size:10px;font-family:"SF Mono",Menlo,monospace;color:var(--dim);}
  @media (max-width:760px){ .key{min-width:20px;height:80px;} }