:root{
    --body-bg:#141519;
    --chassis:#232529;
    --chassis-hi:#2c2f35;
    --chassis-lo:#191b1f;
    --lcd-bg:#0c1f12;
    --lcd-fg:#8dffb0;
    --lcd-dim:#3f8a5c;
    --amber:#ff9f1c;
    --amber-dim:#7a4a08;
    --text:#cfd2d8;
    --text-dim:#8b8f98;
    --danger:#ff4d4d;
    --ok:#2ecc71;
  }
  *{box-sizing:border-box;margin:0;padding:0;}
  /* mobile: 防 tap/long-press 彈出文字選取工具（REC 掣被干擾） */
  html,body{-webkit-user-select:none!important;-moz-user-select:none!important;user-select:none!important;-webkit-touch-callout:none!important;}
  input,textarea{-webkit-user-select:text!important;-moz-user-select:text!important;user-select:text!important;}
  .btn,.pad,.knob,.seq-cell,.bank,.file-drop,select{-webkit-touch-callout:none!important;-webkit-user-select:none!important;user-select:none!important;touch-action:manipulation;}
  body{
    background:
      radial-gradient(1200px 800px at 50% -10%, #23252b 0%, var(--body-bg) 55%, #0c0d10 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:32px 16px 80px;
  }
  .chassis{
    width:1040px; max-width:100%;
    background:linear-gradient(160deg,var(--chassis-hi),var(--chassis) 40%,var(--chassis-lo));
    border-radius:22px; padding:26px 30px 22px;
    box-shadow:0 30px 60px rgba(0,0,0,.55), inset 0 1px 0 rgba(255,255,255,.08), inset 0 -3px 8px rgba(0,0,0,.4);
    border:1px solid #3a3d44; position:relative;
  }
  .chassis::before,.chassis::after{content:"";position:absolute;width:14px;height:14px;border-radius:50%;
    background:radial-gradient(circle at 35% 30%, #565a62, #22242a 70%); box-shadow:inset 0 1px 2px rgba(255,255,255,.25), 0 2px 3px rgba(0,0,0,.6);}
  .chassis::before{top:10px;left:12px;} .chassis::after{top:10px;right:12px;}
  .brand{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:12px;padding:0 4px;}
  .brand h1{font-size:15px;letter-spacing:4px;color:#e8eaee;font-weight:700;text-transform:uppercase;}
  .brand h1 span{color:var(--amber);}
  .brand .sub{font-size:10px;letter-spacing:2px;color:var(--text-dim);text-transform:uppercase;}
  .lcd-wrap{display:flex;gap:16px;margin-bottom:16px;align-items:stretch;}
  #lcd{
    flex:1; background:var(--lcd-bg); border-radius:10px; padding:10px 14px; min-height:96px;
    font-family:"SF Mono",Menlo,Consolas,monospace; font-size:13px; line-height:1.5; color:var(--lcd-fg);
    text-shadow:0 0 6px rgba(90,255,150,.45); border:1px solid #000; position:relative; overflow:hidden;
    box-shadow:inset 0 0 24px rgba(0,0,0,.65), inset 0 2px 6px rgba(0,255,120,.06);
    white-space:pre; display:flex; flex-direction:column; justify-content:center;
  }
  #lcd::after{content:"";position:absolute;inset:0;pointer-events:none;
    background:repeating-linear-gradient(0deg, rgba(0,0,0,.16) 0 1px, transparent 1px 3px);}
  .lcd-row{display:flex;justify-content:space-between;align-items:center;}
  .leds{display:flex;flex-direction:column;justify-content:center;gap:8px;padding:4px 8px;background:#1a1c20;border-radius:8px;border:1px solid #000;}
  .led{display:flex;align-items:center;gap:6px;font-size:9px;letter-spacing:1px;color:var(--text-dim);}
  .led .dot{width:9px;height:9px;border-radius:50%;background:#222;box-shadow:inset 0 1px 2px #000;}
  .led.on .dot{background:var(--ok);box-shadow:0 0 8px var(--ok);}
  .led.on.amber .dot{background:var(--amber);box-shadow:0 0 8px var(--amber);}
  .led.on.red .dot{background:var(--danger);box-shadow:0 0 8px var(--danger);}
  #vu{width:220px;height:100%;min-height:96px;}
  .fx-row{display:flex;gap:14px;align-items:center;margin-bottom:16px;flex-wrap:wrap;}
  .fx-group{display:flex;gap:10px;align-items:center;}
  .knob-wrap{display:flex;flex-direction:column;align-items:center;gap:3px;}
  .knob{width:52px;height:52px;border-radius:50%;position:relative;cursor:ns-resize;
    background:radial-gradient(circle at 35% 30%, #4a4e56, #23252a 65%, #14161a);
    box-shadow:0 3px 6px rgba(0,0,0,.6), inset 0 1px 1px rgba(255,255,255,.25);}
  .knob::before{content:"";position:absolute;top:3px;left:50%;width:3px;height:16px;margin-left:-1.5px;border-radius:2px;
    background:var(--amber);box-shadow:0 0 5px rgba(255,159,28,.6); transform-origin:50% 23px;}
  .knob-label{font-size:9px;letter-spacing:1px;color:var(--text-dim);text-transform:uppercase;}
  .knob-val{font-size:10px;font-family:"SF Mono",Menlo,monospace;color:var(--amber);min-height:12px;}
  select.eff{
    appearance:none; background:#17181c; color:var(--amber); border:1px solid #3a3d44; border-radius:8px;
    padding:9px 12px; font-size:12px; letter-spacing:1px; text-transform:uppercase; font-weight:600; cursor:pointer;
    box-shadow:inset 0 2px 4px rgba(0,0,0,.5);
  }
  select.eff:focus{outline:1px solid var(--amber);}
  .btn{
    background:linear-gradient(180deg,#2e3138,#1d1f24); color:var(--text); border:1px solid #3c3f46; border-radius:8px;
    padding:8px 12px; font-size:11px; letter-spacing:1px; text-transform:uppercase; font-weight:600; cursor:pointer;
    box-shadow:0 2px 3px rgba(0,0,0,.5), inset 0 1px 0 rgba(255,255,255,.08); user-select:none;
  }
  .btn:hover{filter:brightness(1.15);}
  .btn:active{transform:translateY(1px);}
  .btn.amber{background:linear-gradient(180deg,#ffb347,#e08a00); color:#241500; border-color:#ffc469;}
  .btn.dream{background:linear-gradient(180deg,#c9a0ff,#8a5cf6); color:#1c0f33; border-color:#d9b8ff; box-shadow:0 0 14px rgba(138,92,246,.35);}
  .btn.mini{padding:3px 8px;font-size:9px;border-radius:6px;letter-spacing:0.5px;}
  .btn.hold.on{background:linear-gradient(180deg,#ff8a5c,#e0531f); color:#2b0d00;}
  .pads{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:16px;}
  .pad{
    position:relative; height:118px; border-radius:14px; cursor:pointer; user-select:none;
    --pc:#ff9f1c;
    background:
      radial-gradient(120% 120% at 50% 0%, rgba(255,255,255,.16) 0%, transparent 45%),
      linear-gradient(160deg, color-mix(in srgb, var(--pc) 78%, #fff 8%), color-mix(in srgb, var(--pc) 55%, #000 12%) 55%, color-mix(in srgb, var(--pc) 38%, #000 25%));
    border:1px solid color-mix(in srgb, var(--pc) 60%, #333);
    box-shadow:0 5px 10px rgba(0,0,0,.5), inset 0 1px 0 rgba(255,255,255,.3), inset 0 -4px 8px rgba(0,0,0,.35);
    transition:transform .04s, box-shadow .04s, filter .04s;
    display:flex; flex-direction:column; justify-content:flex-end; padding:8px 10px; overflow:hidden;
  }
  .pad .pid{position:absolute;top:6px;left:8px;font-size:9px;color:rgba(255,255,255,.75);font-weight:700;letter-spacing:1px;}
  .pad .pname{font-size:11px;font-weight:700;color:#fff;text-shadow:0 1px 3px rgba(0,0,0,.7);line-height:1.2;overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;}
  .pad .pmeta{font-size:9px;color:rgba(255,255,255,.7);text-shadow:0 1px 2px rgba(0,0,0,.7);}
  .pad .pkey{position:absolute;bottom:6px;right:9px;font-size:9px;color:rgba(255,255,255,.55);border:1px solid rgba(255,255,255,.4);border-radius:4px;padding:1px 4px;}
  .pad.down{transform:translateY(2px);filter:brightness(1.35) saturate(1.2);box-shadow:0 1px 3px rgba(0,0,0,.5), inset 0 0 22px rgba(255,255,255,.4);}
  .pad.empty{opacity:.5;background:linear-gradient(160deg,#3a3d44,#22242a);border-color:#464a52;}
  .pad.empty .pname{color:#9aa; }
  .pad.sel{outline:2px solid #fff;outline-offset:2px;}
  .bank-row{display:flex;gap:10px;align-items:center;margin-bottom:16px;}
  .bank{width:52px;height:40px;font-size:14px;}
  .bank.on{background:linear-gradient(180deg,#ffb347,#e08a00);color:#241500;border-color:#ffc469;}
  .transport{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-bottom:18px;padding:12px 14px;background:#1a1c20;border-radius:12px;border:1px solid #000;}
  .t-label{font-size:10px;letter-spacing:1px;color:var(--text-dim);text-transform:uppercase;}
  .bpm-val{font-size:20px;font-family:"SF Mono",Menlo,monospace;color:var(--amber);min-width:64px;text-align:right;}
  .t-num{font-size:12px;font-family:"SF Mono",Menlo,monospace;color:var(--text);}
  input[type=range]{accent-color:var(--amber);width:110px;}
  .seq-wrap{margin-bottom:18px;padding:14px;background:#1a1c20;border-radius:12px;border:1px solid #000;}
  .seq-title{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px;}
  .seq-head,.seq-row{display:grid;grid-template-columns:64px repeat(64,1fr);gap:3px;margin-bottom:3px;}
  .seq-head div{font-size:8px;color:var(--text-dim);text-align:center;letter-spacing:0;}
  .seq-head div.bar{color:var(--amber);font-weight:700;}
  .seq-label{font-size:9px;color:var(--text-dim);text-align:right;padding-right:6px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;line-height:22px;}
  .seq-cell{height:22px;border-radius:3px;background:#101115;border:1px solid #23252b;cursor:pointer;-webkit-touch-callout:none;}
  .seq-cell.bar{border-left:2px solid #3f424a;}
  .seq-cell.on{background:var(--pc);box-shadow:0 0 6px var(--pc);}
  .seq-cell.cur{outline:1px solid #fff;outline-offset:-1px;}
  .seq-scroll{overflow-x:auto;overflow-y:hidden;-webkit-overflow-scrolling:touch;}
  .inspector{display:flex;gap:14px;align-items:center;flex-wrap:wrap;margin-bottom:14px;padding:12px 14px;background:#1a1c20;border-radius:12px;border:1px solid #000;}
  .inspector .field{display:flex;flex-direction:column;gap:3px;}
  .inspector label{font-size:9px;letter-spacing:1px;color:var(--text-dim);text-transform:uppercase;}
  .inspector input[type=text],.inspector select{background:#101115;border:1px solid #33363e;color:var(--text);border-radius:6px;padding:5px 8px;font-size:12px;}
  .footer{display:flex;gap:10px;flex-wrap:wrap;align-items:center;padding-top:6px;}
  .hint{font-size:10px;color:var(--text-dim);margin-left:auto;text-align:right;line-height:1.6;}
  .file-drop{border:1px dashed #4a4e56;border-radius:8px;padding:10px 14px;font-size:11px;color:var(--text-dim);cursor:pointer;text-align:center;flex:1;min-width:180px;}
  .file-drop:hover{border-color:var(--amber);color:var(--amber);}
  .status{font-size:10px;font-family:"SF Mono",Menlo,monospace;color:var(--text-dim);}
  .midi-on{color:var(--ok);}
  @media (max-width:760px){
    body{padding:12px;}
    .chassis{padding:16px;}
    .pad{height:88px;}
    .seq-head,.seq-row{grid-template-columns:44px repeat(64, 18px);gap:2px;}
    .seq-scroll{overflow-x:auto;overflow-y:hidden;-webkit-overflow-scrolling:touch;}
    .seq-cell{height:20px;}
    #vu{display:none;}
  }
  /* landscape 手機：格仔縮細 + 版面壓實，睇到更多 steps */
  @media (orientation:landscape) and (max-height:520px){
    .chassis{padding:12px 14px;}
    .pads{grid-template-columns:repeat(8,1fr);gap:8px;}
    .pad{height:52px;}
    .seq-head,.seq-row{grid-template-columns:32px repeat(64, 9px);gap:1px;}
    .seq-cell{height:15px;}
    .seq-label{font-size:7px;line-height:15px;}
    .seq-scroll{max-height:200px;}
    .transport,.inspector,.fx-row{flex-wrap:nowrap;overflow-x:auto;}
    .lcd-wrap{display:none;}
  }