:root{
    --bg:#14161c; --panel:#1d2029; --panel2:#252a36; --border:#343b4a;
    --text:#e8eaf0; --muted:#8a90a4; --accent:#6c8cff;
    --lead:#ff6b6b; --harmony:#ffd166; --bass:#4ecdc4; --perc:#b388ff;
    --rec:#ff4757; --ok:#2ed573;
    --mono:"Space Mono",monospace;
  }
  *{box-sizing:border-box}
  body{margin:0;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;background:var(--bg);color:var(--text);}

  /* Page wrap / back link / ad placements (shared layout pattern, matches metronome.css) */
  .wrap{width:100%}
  .back-link{display:inline-flex;align-items:center;gap:.45rem;font-family:var(--mono);font-size:.68rem;color:var(--muted);text-decoration:none;margin:1rem 0 0 1.25rem;padding:.35rem .7rem;border:1px solid var(--border);border-radius:7px;transition:color .15s,border-color .15s}
  .back-link:hover{color:var(--text);border-color:var(--accent)}
  .ad-sidebar{display:none;position:fixed;top:50%;transform:translateY(-50%);width:160px;z-index:10}
  .ad-sidebar-left{left:max(8px,calc(50% - 600px - 176px))}
  .ad-sidebar-right{right:max(8px,calc(50% - 600px - 176px))}
  @media(min-width:1400px){.ad-sidebar{display:block}}
  .ad-bottom{display:none;position:fixed;bottom:0;left:0;right:0;z-index:100;background:var(--bg);border-top:1px solid var(--border);padding:4px 0;text-align:center}
  @media(max-width:1399px){
    .ad-bottom{display:block}
    body{padding-bottom:6rem}
  }

  header{padding:18px 24px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;}
  header h1{font-size:18px;margin:0;font-weight:600;}
  header .sub{color:var(--muted);font-size:12px;margin-top:2px;}
  .transport{display:flex;gap:8px;align-items:center;}
  button{font:inherit;cursor:pointer;border:1px solid var(--border);background:var(--panel2);color:var(--text);border-radius:8px;padding:8px 14px;transition:.15s;}
  button:hover{border-color:var(--accent);}
  button.primary{background:var(--accent);border-color:var(--accent);color:#fff;}
  button.danger{background:var(--rec);border-color:var(--rec);color:#fff;}
  button:disabled{opacity:.35;cursor:not-allowed;}
  button.small{padding:5px 10px;font-size:12px;}
  main{padding:20px 24px 60px;max-width:1200px;margin:0 auto;}
  .tabs{display:flex;gap:8px;margin-bottom:18px;flex-wrap:wrap;}
  .tab{padding:10px 16px;border-radius:10px;border:1px solid var(--border);background:var(--panel);cursor:pointer;display:flex;align-items:center;gap:8px;font-size:13px;}
  .tab .dot{width:9px;height:9px;border-radius:50%;}
  .tab.active{border-color:var(--accent);background:var(--panel2);box-shadow:0 0 0 1px var(--accent) inset;}
  .tab .count{color:var(--muted);font-size:11px;}
  .panel{background:var(--panel);border:1px solid var(--border);border-radius:14px;padding:20px;margin-bottom:18px;}
  .panel h2{margin:0 0 4px;font-size:15px;display:flex;align-items:center;gap:8px;}
  .panel .desc{color:var(--muted);font-size:12px;margin-bottom:16px;}
  .mode-row{display:flex;gap:10px;margin-bottom:16px;flex-wrap:wrap;align-items:center;}
  .mode-row .spacer{flex:1;}
  .mode-row select, .mode-row input[type=number]{background:var(--panel2);color:var(--text);border:1px solid var(--border);border-radius:8px;padding:7px 10px;font:inherit;}
  .status-pill{font-size:11px;padding:4px 10px;border-radius:20px;background:var(--panel2);border:1px solid var(--border);color:var(--muted);}
  .status-pill.live{color:var(--rec);border-color:var(--rec);}
  .status-pill.armed{color:var(--accent);border-color:var(--accent);}

  /* Piano */
  .piano-wrap{overflow-x:auto;padding-bottom:10px;}
  .piano-stack{margin:0 auto;}
  .kbd-strip{position:relative;height:46px;margin-bottom:6px;}
  .key-tag{
    position:absolute;top:0;transform:translateX(-50%);background:var(--panel2);
    border:1px solid var(--border);color:var(--text);font-size:10px;font-weight:800;
    padding:2px 5px;border-radius:5px;white-space:nowrap;pointer-events:none;line-height:1.2;
  }
  .key-tag-black{background:#10131a;border-color:#000;color:#d8dbe6;}
  .piano{position:relative;height:160px;display:flex;width:max-content;}
  .white-key{
    position:relative;width:42px;height:160px;background:#f4f4f6;border:1px solid #15171c;
    border-radius:0 0 6px 6px;display:flex;align-items:flex-end;justify-content:center;
    padding-bottom:8px;font-size:10px;color:#333;user-select:none;flex-shrink:0;
  }
  .white-key .lbl{pointer-events:none;}
  .black-key{
    position:absolute;top:0;width:26px;height:96px;background:#1a1a1a;border:1px solid #000;
    border-radius:0 0 5px 5px;z-index:2;display:flex;align-items:flex-end;justify-content:center;
    padding-bottom:6px;font-size:9px;color:#ccc;user-select:none;
  }
  .white-key.has-sample{background:#dff5e3;}
  .black-key.has-sample{background:#1d3b27;}
  .white-key.recording{background:var(--rec)!important;}
  .black-key.recording{background:var(--rec)!important;}
  .white-key.playing{background:#c9b3f5!important;}
  .black-key.playing{background:#5b3fa0!important;}
  .white-key:active, .black-key:active{filter:brightness(.9);}

  .legend{display:flex;gap:16px;margin-top:10px;font-size:11px;color:var(--muted);flex-wrap:wrap;}
  .legend span{display:inline-flex;align-items:center;gap:5px;}
  .legend i{width:10px;height:10px;border-radius:3px;display:inline-block;}

  /* Sample bank */
  .sample-section{margin-top:18px;}
  .sample-section h3{font-size:13px;margin:0 0 10px;color:var(--text);}
  .sample-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(236px,1fr));gap:10px;}
  .sample-card{background:var(--panel2);border:1px solid var(--border);border-radius:9px;padding:8px;}
  .sc-head{display:flex;justify-content:space-between;align-items:center;font-size:11px;margin-bottom:6px;}
  .sc-head .kbd-tag{background:var(--bg);border:1px solid var(--border);border-radius:4px;padding:1px 5px;font-size:9px;color:var(--muted);}
  .sc-trim-wrap{position:relative;border-radius:5px;background:var(--bg);overflow:hidden;}
  .sc-wave{display:block;}
  .sc-trim-mask{position:absolute;top:0;height:100%;background:rgba(0,0,0,0.7);pointer-events:none;}
  .sc-trim-mask-left{left:0;}
  .sc-trim-mask-right{right:0;}
  .sc-trim-handle{position:absolute;top:0;width:8px;height:100%;background:rgba(255,255,255,0.22);cursor:ew-resize;touch-action:none;z-index:2;}
  .sc-trim-handle:hover, .sc-trim-handle.dragging{background:rgba(255,255,255,0.55);}
  .sc-trim-info{font-size:10px;color:var(--muted);margin-top:5px;}
  .sc-btns{display:flex;gap:5px;margin-top:8px;flex-wrap:wrap;}
  .sc-btns button{flex:1;min-width:62px;padding:4px 5px;font-size:10px;}
  .empty-hint{color:var(--muted);font-size:12px;padding:10px 0;}

  /* Timeline / arrangement view */
  .timeline-section{margin-bottom:20px;}
  .timeline-scroll{overflow-x:auto;}
  .ruler{position:relative;height:18px;margin-left:70px;}
  .ruler span{position:absolute;top:0;font-size:10px;color:var(--muted);transform:translateX(-50%);}
  .tl-row{display:flex;align-items:center;gap:10px;margin-bottom:6px;}
  .tl-label{width:60px;flex-shrink:0;font-size:11px;display:flex;align-items:center;gap:6px;color:var(--muted);}
  .tl-label .dot{width:8px;height:8px;border-radius:50%;display:inline-block;}
  .tl-lane{position:relative;background:var(--panel2);border:1px solid var(--border);border-radius:6px;flex-shrink:0;overflow:visible;}
  .tl-clear-btn{flex-shrink:0;font-size:11px;padding:6px 10px;}
  .tl-grid{position:absolute;top:0;left:0;pointer-events:none;}
  .tl-block{
    position:absolute;background:var(--panel);border:1.5px solid;border-radius:5px;
    cursor:grab;touch-action:none;user-select:none;box-shadow:0 1px 3px rgba(0,0,0,.4);
    z-index:1;
  }
  .tl-block-clip{position:absolute;inset:0;overflow:hidden;border-radius:4px;}
  .tl-block-fullwave{position:absolute;top:0;display:block;}
  .tl-block-loopwave{display:block;}
  .tl-block-extended{border-style:dashed;}
  .tl-block .tl-block-label{
    position:absolute;top:1px;left:3px;font-size:9px;font-weight:700;color:#fff;
    text-shadow:0 0 3px rgba(0,0,0,.9);pointer-events:none;
  }
  .tl-block:hover{filter:brightness(1.15);z-index:10;}
  .tl-block.dragging{cursor:grabbing;z-index:20;filter:brightness(1.3);box-shadow:0 2px 8px rgba(0,0,0,.6);}
  .tl-delete-btn{
    position:absolute;top:-7px;right:-7px;width:16px;height:16px;border-radius:50%;
    background:var(--rec);color:#fff;border:1.5px solid var(--panel);font-size:9px;line-height:1;
    display:flex;align-items:center;justify-content:center;padding:0;cursor:pointer;
    opacity:0;transform:scale(.7);transition:opacity .12s,transform .12s;z-index:21;
  }
  .tl-block:hover .tl-delete-btn{opacity:1;transform:scale(1);}
  .tl-handle{position:absolute;top:0;width:7px;height:100%;cursor:ew-resize;z-index:4;}
  .tl-handle-left{left:0;}
  .tl-handle-right{right:0;}
  .tl-handle::after{content:'';position:absolute;top:25%;left:2px;width:3px;height:50%;border-radius:2px;background:rgba(255,255,255,0);transition:background .12s;}
  .tl-block:hover .tl-handle::after{background:rgba(255,255,255,.55);}

  .mix-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px;}
  .mix-card{background:var(--panel2);border:1px solid var(--border);border-radius:10px;padding:12px 14px;}
  .mix-card h3{margin:0 0 8px;font-size:13px;display:flex;align-items:center;gap:7px;}
  .mix-card .row{display:flex;align-items:center;gap:8px;font-size:11px;color:var(--muted);margin-bottom:6px;}
  .mix-card input[type=range]{flex:1;}
  .takeinfo{font-size:11px;color:var(--muted);margin-top:6px;}

  footer{text-align:center;color:var(--muted);font-size:11px;padding:20px;}
  .hint{font-size:11px;color:var(--muted);background:var(--panel2);border:1px dashed var(--border);border-radius:8px;padding:8px 12px;margin-top:8px;}