@import url('https://fonts.googleapis.com/css2?family=Libre+Baskerville:ital,wght@0,400;0,700;1,400&family=JetBrains+Mono:wght@400;500&display=swap');
  *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
  :root {
    --bg: #ffffff; --bg2: #f8f8f8; --bg3: #f0f0f0;
    --border: #d0d0d0; --border2: #b0b0b0;
    --text: #1a1a1a; --text2: #4a4a4a; --text3: #7a7a7a;
    --accent: #000000; --accent2: #333333;
    --finger: #555555; --finger2: #333333;
    --thumb: #666666;
  }
  body { font-family: 'Libre Baskerville', Georgia, serif; background: var(--bg); color: var(--text); min-height: 100vh; display: flex; flex-direction: column; align-items: center; padding: 2.5rem 2rem; }
  header { text-align: center; margin-bottom: 2.5rem; }
  header h1 { font-size: 1.6rem; font-weight: 700; letter-spacing: .15em; text-transform: uppercase; color: var(--accent); margin-bottom: .4rem; }
  header h2 { font-size: 1rem; font-weight: 400; letter-spacing: .15em; text-transform: uppercase; color: var(--text3); }

  .main { display: flex; gap: 2rem; align-items: flex-start; flex-wrap: wrap; justify-content: center; width: 100%; max-width: 1400px; }

  /* ── SONG LIST PANEL ── */
  .disco-panel { background: var(--bg2); border: 2px solid var(--border); border-radius: 12px; padding: 1.5rem; width: 350px; max-height: 85vh; display: flex; flex-direction: column; }
  .disco-panel h3 { font-size: .95rem; letter-spacing: .12em; text-transform: uppercase; color: var(--text2); font-weight: 600; margin-bottom: 1rem; }
  .disco-scroll { overflow-y: auto; flex: 1; }
  .disco-scroll::-webkit-scrollbar { width: 8px; }
  .disco-scroll::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 4px; }
  .track-item { font-size: .9rem; color: var(--text2); padding: .7rem .8rem; cursor: pointer; border-radius: 8px; display: flex; align-items: flex-start; gap: .8rem; border-left: 3px solid transparent; margin-bottom: .6rem; background: var(--bg); }
  .track-item:hover { background: var(--bg3); color: var(--text); border-color: var(--border2); }
  .track-item.active { border-left-color: var(--accent); color: var(--accent); background: var(--bg3); }
  .track-item .track-num { color: var(--text3); font-family: 'JetBrains Mono', monospace; min-width: 28px; font-size: .85rem; margin-top: 3px; font-weight: 500; }
  .track-item .track-info { flex: 1; }
  .track-item .track-title { font-weight: 600; margin-bottom: .4rem; font-size: .95rem; }
  .track-item .track-chords { font-size: .8rem; color: var(--text3); font-family: 'JetBrains Mono', monospace; line-height: 1.5; }
  .track-item .chord-count { margin-left: auto; font-family: 'JetBrains Mono', monospace; font-size: .8rem; color: var(--text3); margin-top: 3px; }
  .track-item .chord-count.has-chords { color: var(--text); font-weight: 600; }

  /* ── EDITOR PANEL ── */
  .editor-panel { background: var(--bg2); border: 2px solid var(--border); border-radius: 12px; padding: 2rem; width: 420px; }
  .context-label { font-size: .9rem; color: var(--text2); font-style: italic; margin-bottom: 1.2rem; min-height: 1.6em; font-family: 'JetBrains Mono', monospace; }
  .context-label span { color: var(--accent); font-style: normal; font-weight: 600; }
  .chord-name-row { display: flex; gap: .8rem; margin-bottom: .8rem; align-items: center; }
  .chord-name-row input { flex: 1; background: var(--bg); border: 2px solid var(--border); border-radius: 8px; color: var(--text); font-family: 'Libre Baskerville', serif; font-size: 1.2rem; padding: .7rem 1rem; outline: none; width: 100%; }
  .chord-name-row input:focus { border-color: var(--accent); }
  .pos-row { display: flex; align-items: center; gap: .8rem; margin-bottom: 1.2rem; }
  .pos-label { font-size: .9rem; color: var(--text2); white-space: nowrap; font-weight: 500; }
  .pos-select { background: var(--bg); border: 2px solid var(--border); border-radius: 8px; color: var(--text); font-family: 'JetBrains Mono', monospace; font-size: 1rem; padding: .7rem .8rem; outline: none; cursor: pointer; }
  .guitar-select-row { display: flex; gap: .6rem; margin-bottom: 1rem; flex-wrap: wrap; }
  .guitar-btn { flex: 1; min-width: 85px; padding: .6rem .5rem; border-radius: 8px; border: 2px solid var(--border); background: var(--bg); color: var(--text2); font-family: 'JetBrains Mono', monospace; font-size: .85rem; cursor: pointer; transition: all .15s; text-align: center; font-weight: 500; }
  .guitar-btn:hover { border-color: var(--accent); color: var(--accent); }
  .guitar-btn.active { background: var(--accent); border-color: var(--accent); color: var(--bg); font-weight: 600; }
  .play-row { display: flex; gap: .6rem; margin-bottom: .8rem; }
  .play-btn { flex: 1; padding: .8rem; border-radius: 8px; border: 2px solid var(--accent); background: var(--accent); color: var(--bg); font-family: 'JetBrains Mono', monospace; font-size: .95rem; font-weight: 600; cursor: pointer; transition: all .15s; display: flex; align-items: center; justify-content: center; gap: .6rem; }
  .play-btn:hover { background: var(--accent2); border-color: var(--accent2); transform: translateY(-2px); box-shadow: 0 4px 12px rgba(0,0,0,0.15); }
  .play-btn:active { transform: translateY(0); }
  
  /* ── AUTOFINGER SWITCH ── */
  .autofinger-switch-container { 
    display: flex; 
    justify-content: center; 
    margin: 1rem 0 0.8rem; 
  }
  .autofinger-switch { 
    width: 220px; 
    height: 66px; 
    background-image: url('switch_off.png'); 
    background-size: contain; 
    background-repeat: no-repeat; 
    background-position: center;
    cursor: pointer; 
    transition: background-image 0.15s;
  }
  .autofinger-switch:hover {
    transform: scale(1.05);
    transition: transform 0.2s;
  }
  .autofinger-switch.active { 
    background-image: url('switch_on.png'); 
  }
  
  .mode-row { display: flex; gap: .6rem; margin-bottom: .6rem; flex-wrap: wrap; }
  .mode-btn { flex: 1; min-width: 65px; padding: .6rem .5rem; border-radius: 8px; border: 2px solid var(--border); background: var(--bg); color: var(--text2); font-family: 'JetBrains Mono', monospace; font-size: .85rem; cursor: pointer; transition: all .15s; text-align: center; font-weight: 500; }
  .mode-btn:hover { border-color: var(--accent); color: var(--accent); }
  .mode-btn.active { background: var(--finger2); border-color: var(--finger); color: #fff; }
  .mode-btn.thumb.active { background: var(--thumb); border-color: var(--thumb); color: #fff; }
  .mode-btn.mute-btn.active { background: var(--bg3); border-color: var(--text3); color: var(--text3); }
  .mode-btn.open-btn.active { background: var(--bg3); border-color: var(--text2); color: var(--text2); }
  .mode-btn.barre-btn.active { background: var(--finger2); border-color: var(--finger); color: #fff; }
  .fretboard-wrap { margin: 1.2rem 0; }
  #fretboard { display: block; cursor: pointer; border-radius: 8px; width: 100%; border: 2px solid var(--border); }
  .action-row { display: flex; gap: .6rem; }
  .action-btn { flex: 1; padding: .7rem; border-radius: 8px; border: 2px solid var(--border); background: var(--bg); color: var(--text2); font-family: 'JetBrains Mono', monospace; font-size: .9rem; cursor: pointer; transition: all .15s; font-weight: 500; }
  .action-btn:hover { border-color: var(--accent); color: var(--accent); background: var(--bg3); }
  .action-btn.save { border-color: var(--accent); color: var(--accent); font-weight: 600; }
  .action-btn.save:hover { background: var(--accent); color: var(--bg); }
  .status-msg { font-size: .85rem; font-style: italic; color: var(--text3); margin-top: .8rem; min-height: 1.2em; font-family: 'JetBrains Mono', monospace; text-align: center; }
  .status-msg.ok { color: var(--text); font-weight: 600; }
  .status-msg.err { color: #c00; font-weight: 600; }

  /* ── SAVED CHORDS PANEL ── */
  .saved-panel { background: var(--bg2); border: 2px solid var(--border); border-radius: 12px; padding: 1.8rem; width: 420px; max-height: 85vh; display: flex; flex-direction: column; }
  .saved-panel h3 { font-size: .95rem; letter-spacing: .12em; text-transform: uppercase; color: var(--text2); font-weight: 600; margin-bottom: 1rem; }
  .saved-context { font-size: .9rem; color: var(--text2); font-style: italic; margin-bottom: 1rem; font-family: 'JetBrains Mono', monospace; min-height: 1.2em; }
  .saved-grid { display: flex; flex-wrap: wrap; gap: 1rem; overflow-y: auto; flex: 1; align-content: flex-start; }
  .saved-grid::-webkit-scrollbar { width: 8px; }
  .saved-grid::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 4px; }
  .saved-chord { background: var(--bg); border: 2px solid var(--border); border-radius: 8px; padding: .6rem; cursor: pointer; transition: all .15s; position: relative; width: 100px; }
  .saved-chord:hover { border-color: var(--accent); box-shadow: 0 2px 8px rgba(0,0,0,0.1); }
  .saved-chord .chord-label { font-size: .8rem; color: var(--accent); text-align: center; margin-top: .4rem; font-family: 'JetBrains Mono', monospace; word-break: break-all; font-weight: 600; }
  .saved-chord .del-btn { position: absolute; top: 4px; right: 6px; font-size: .8rem; color: var(--text3); cursor: pointer; line-height: 1; z-index: 2; font-weight: 700; }
  .saved-chord .del-btn:hover { color: #c00; }
  .hint { font-size: .85rem; color: var(--text3); font-style: italic; }

  /* ── BOTTOM ROW ── */
  .bottom-row { margin-top: 2rem; display: flex; gap: 1.2rem; justify-content: center; flex-wrap: wrap; width: 100%; max-width: 1400px; }
  .export-btn { padding: .8rem 2rem; border-radius: 8px; border: 2px solid var(--accent); background: transparent; color: var(--accent); font-family: 'Libre Baskerville', serif; font-size: 1rem; cursor: pointer; letter-spacing: .04em; transition: all .2s; font-weight: 600; }
  .export-btn:hover { background: var(--accent); color: var(--bg); }
  .upload-label { padding: .8rem 2rem; border-radius: 8px; border: 2px solid var(--border); background: transparent; color: var(--text2); font-family: 'Libre Baskerville', serif; font-size: 1rem; cursor: pointer; letter-spacing: .04em; transition: all .2s; font-weight: 600; }
  .upload-label:hover { border-color: var(--accent); color: var(--accent); }
  #upload-input { display: none; }
  .export-data { margin-top: 1.2rem; background: var(--bg2); border: 2px solid var(--border); border-radius: 8px; padding: 1.2rem; font-family: 'JetBrains Mono', monospace; font-size: .85rem; color: var(--text); white-space: pre-wrap; max-height: 240px; overflow-y: auto; display: none; text-align: left; width: 100%; max-width: 1400px; }
  
  /* ── CLICKABLE CHORD LINKS ── */
  .chord-link { cursor: pointer; transition: all .15s; padding: 0 2px; border-radius: 2px; }
  .chord-link:hover { background: var(--bg3); color: var(--accent); }
  .chord-link.has-fingering { font-weight: 600; color: var(--text); background: #e8f5e9; padding: 0 3px; border-radius: 3px; }
  .chord-link.has-fingering:hover { background: #c8e6c9; }
  
  /* ── COMPACT CONTROLS IN SAVED PANEL ── */
  .controls-header { padding-bottom: 1rem; margin-bottom: 1rem; border-bottom: 2px solid var(--border); }
  .pos-row-compact { display: flex; align-items: center; gap: .6rem; margin-bottom: .8rem; }
  .pos-row-compact .pos-label { font-size: .85rem; color: var(--text2); font-weight: 500; white-space: nowrap; }
  .pos-row-compact .pos-select { flex: 1; background: var(--bg); border: 2px solid var(--border); border-radius: 6px; color: var(--text); font-family: 'JetBrains Mono', monospace; font-size: .9rem; padding: .5rem .6rem; outline: none; cursor: pointer; }
  .guitar-select-row-compact { display: flex; gap: .5rem; }
  .guitar-btn-compact { flex: 1; padding: .5rem .4rem; border-radius: 6px; border: 2px solid var(--border); background: var(--bg); color: var(--text2); font-family: 'JetBrains Mono', monospace; font-size: .8rem; cursor: pointer; transition: all .15s; text-align: center; font-weight: 500; }
  .guitar-btn-compact:hover { border-color: var(--accent); color: var(--accent); }
  .guitar-btn-compact.active { background: var(--accent); border-color: var(--accent); color: var(--bg); font-weight: 600; }

  footer { margin-top: 2.5rem; font-size: .85rem; color: var(--text3); font-style: italic; text-align: center; }

</head>
<body>