:root{
    --bg:#1b1410;
    --bg2:#241b14;
    --surface:#2d231a;
    --surface2:#372b20;
    --line:#473727;
    --cream:#f6ede0;
    --muted:#b59f88;
    --muted2:#8a755f;
    --gold:#f0b34a;
    --gold-bright:#ffc869;
    --gold-deep:#c98a2a;
    --terra:#e0764a;
    --green:#7bbf6a;
    --shadow:0 18px 50px -20px rgba(0,0,0,.7);
  }
  *{box-sizing:border-box}
  html,body{margin:0;padding:0}
  body{
    background:
      radial-gradient(1200px 600px at 80% -10%, rgba(240,179,74,.12), transparent 60%),
      radial-gradient(900px 500px at -10% 110%, rgba(224,118,74,.10), transparent 55%),
      var(--bg);
    color:var(--cream);
    font-family:"Zen Kaku Gothic New","DM Sans",system-ui,sans-serif;
    min-height:100vh;
    -webkit-font-smoothing:antialiased;
    padding:22px 16px 40px;
  }
  .wrap{max-width:760px;margin:0 auto}

  header{display:flex;align-items:baseline;gap:14px;flex-wrap:wrap;margin-bottom:18px}
  .logo{
    font-family:"Fraunces",serif;font-weight:600;font-size:30px;letter-spacing:.3px;
    color:var(--cream);line-height:1;
  }
  .logo .mark{color:var(--gold)}
  .sub{font-size:12.5px;color:var(--muted);letter-spacing:.04em}

  .card{
    background:linear-gradient(180deg,var(--bg2),var(--surface));
    border:1px solid var(--line);
    border-radius:20px;
    box-shadow:var(--shadow);
    padding:22px;
  }

  /* drop zone */
  #drop{
    border:2px dashed #5a4631;border-radius:18px;
    padding:46px 22px;text-align:center;cursor:pointer;
    transition:.2s border-color,.2s background;
    background:rgba(240,179,74,.03);
  }
  #drop:hover,#drop.over{border-color:var(--gold);background:rgba(240,179,74,.09)}
  .dz-ico{font-size:40px;line-height:1;margin-bottom:10px}
  .dz-title{font-size:17px;font-weight:700;margin-bottom:6px}
  .dz-hint{font-size:13px;color:var(--muted);line-height:1.7}
  .dz-hint b{color:var(--gold-bright);font-weight:700}

  .hidden{display:none !important}

  /* track header */
  .track{display:flex;align-items:center;gap:12px;margin-bottom:16px}
  .track .name{font-weight:700;font-size:16px;flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  .ghost{
    background:transparent;border:1px solid var(--line);color:var(--muted);
    font-family:inherit;font-size:12.5px;padding:7px 12px;border-radius:10px;cursor:pointer;white-space:nowrap;
  }
  .ghost:hover{border-color:var(--gold);color:var(--gold-bright)}

  /* waveform */
  .wave-box{position:relative;background:var(--bg);border-radius:14px;border:1px solid var(--line);overflow:hidden;touch-action:none}
  canvas{display:block;width:100%;height:120px}
  .times{display:flex;justify-content:space-between;font-family:"DM Sans",sans-serif;font-variant-numeric:tabular-nums;font-size:13px;color:var(--muted);margin:8px 2px 0}
  .times .cur{color:var(--gold-bright);font-weight:600}

  /* transport */
  .transport{display:flex;align-items:center;justify-content:center;gap:14px;margin:18px 0 6px}
  .tbtn{
    width:48px;height:48px;border-radius:50%;border:1px solid var(--line);
    background:var(--surface2);color:var(--cream);cursor:pointer;display:grid;place-items:center;
    transition:.15s transform,.15s background,.15s border-color;
  }
  .tbtn:hover{border-color:var(--gold);color:var(--gold-bright)}
  .tbtn:active{transform:scale(.93)}
  .tbtn svg{width:20px;height:20px;fill:currentColor}
  .play{
    width:64px;height:64px;background:linear-gradient(160deg,var(--gold-bright),var(--gold-deep));
    border:none;color:#2a1c0c;box-shadow:0 10px 26px -8px rgba(240,179,74,.6);
  }
  .play:hover{color:#2a1c0c}
  .play svg{width:26px;height:26px}

  .grid{display:grid;gap:14px;margin-top:18px}
  .panel{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:15px 16px}
  .panel .head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}
  .panel .ttl{font-size:13px;font-weight:700;color:var(--gold-bright);letter-spacing:.06em}

  .row{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
  .chip{
    border:1px solid var(--line);background:var(--surface2);color:var(--cream);
    font-family:inherit;font-size:13px;font-weight:600;padding:9px 13px;border-radius:10px;cursor:pointer;
    transition:.15s;
  }
  .chip:hover{border-color:var(--gold);color:var(--gold-bright)}
  .chip.on{background:linear-gradient(160deg,var(--gold-bright),var(--gold-deep));color:#2a1c0c;border-color:transparent}
  .chip.a{border-color:var(--gold)}
  .chip.b{border-color:var(--terra)}
  .chip.danger:hover{border-color:var(--terra);color:#ffb393}

  .ab-readout{font-family:"DM Sans",sans-serif;font-variant-numeric:tabular-nums;font-size:12.5px;color:var(--muted);margin-left:auto}
  .ab-readout span{color:var(--cream);font-weight:600}

  /* sliders */
  .slider-row{display:flex;align-items:center;gap:12px}
  .slider-row label{font-size:12.5px;color:var(--muted);width:34px;text-align:right}
  input[type=range]{
    -webkit-appearance:none;appearance:none;flex:1;height:6px;border-radius:6px;
    background:linear-gradient(90deg,var(--gold),var(--gold-deep));
    background-size:var(--fill,50%) 100%;background-repeat:no-repeat;
    background-color:#473727;outline:none;cursor:pointer;
  }
  input[type=range]::-webkit-slider-thumb{
    -webkit-appearance:none;width:18px;height:18px;border-radius:50%;
    background:var(--cream);border:3px solid var(--gold-deep);cursor:pointer;box-shadow:0 2px 6px rgba(0,0,0,.5);
  }
  input[type=range]::-moz-range-thumb{
    width:16px;height:16px;border-radius:50%;background:var(--cream);border:3px solid var(--gold-deep);cursor:pointer;
  }
  .val{font-family:"DM Sans",sans-serif;font-variant-numeric:tabular-nums;font-size:13.5px;font-weight:700;color:var(--gold-bright);width:54px;text-align:right}

  .speed-presets{display:flex;gap:7px;flex-wrap:wrap;margin-top:11px}
  .speed-presets .chip{padding:6px 11px;font-size:12.5px}

  /* key / pitch controls */
  .keyrow{display:flex;align-items:center;justify-content:center;gap:14px}
  .keybtn{
    width:46px;height:46px;border-radius:50%;border:1px solid var(--line);
    background:var(--surface2);color:var(--cream);font-size:24px;font-weight:600;line-height:1;
    cursor:pointer;display:grid;place-items:center;transition:.15s;
  }
  .keybtn:hover{border-color:var(--gold);color:var(--gold-bright)}
  .keybtn:active{transform:scale(.92)}
  .keyval{
    font-family:"DM Sans",sans-serif;font-variant-numeric:tabular-nums;
    font-size:26px;font-weight:700;color:var(--gold-bright);min-width:74px;text-align:center;
  }
  .keypresets{display:flex;gap:7px;flex-wrap:wrap;justify-content:center;margin-top:13px}
  .keypresets .chip{padding:6px 12px;font-size:12.5px;font-variant-numeric:tabular-nums}

  .toggle{display:flex;align-items:center;gap:8px;font-size:12.5px;color:var(--muted);cursor:pointer;user-select:none}
  .toggle input{display:none}
  .switch{width:38px;height:22px;border-radius:22px;background:#473727;position:relative;transition:.2s;flex:none}
  .switch::after{content:"";position:absolute;width:16px;height:16px;border-radius:50%;background:var(--cream);top:3px;left:3px;transition:.2s}
  .toggle input:checked + .switch{background:linear-gradient(160deg,var(--gold-bright),var(--gold-deep))}
  .toggle input:checked + .switch::after{left:19px}

  .tips{font-size:12px;color:var(--muted2);line-height:1.9;margin-top:18px}
  .tips kbd{
    font-family:"DM Sans",monospace;background:var(--surface2);border:1px solid var(--line);
    border-bottom-width:2px;border-radius:6px;padding:1px 7px;color:var(--cream);font-size:11.5px;
  }
  .tips .sep{color:var(--line)}
  @media (max-width:520px){
    .tips .deskonly{display:none}
  }

  /* status banner */
  .status{border-radius:12px;padding:11px 14px;font-size:13px;line-height:1.7;margin-bottom:14px}
  .status.info{background:rgba(123,191,106,.10);border:1px solid #3e5a36;color:#bfe3b3}
  .status.warn{background:rgba(224,118,74,.12);border:1px solid #6b4128;color:#ffc1a3}
  .status.err{background:rgba(224,80,74,.14);border:1px solid #7a3030;color:#ffb3ae}
  .status b{color:var(--cream)}

  /* native fallback */
  .fallback{margin-top:16px;padding-top:14px;border-top:1px dashed var(--line)}
  .fallback .lnk{background:none;border:none;color:var(--muted);font-family:inherit;font-size:12.5px;text-decoration:underline;cursor:pointer;padding:0}
  .fallback .lnk:hover{color:var(--gold-bright)}
  .fallback audio{width:100%;margin-top:12px;border-radius:10px}