/* Fretboard Atlas — styles. Fonts: Google Fonts (Outfit, Space Mono), SIL OFL. */
@font-face{font-family:'Outfit';font-style:normal;font-weight:400;font-display:swap;src:url(fonts/Outfit-400.woff2) format('woff2')}
@font-face{font-family:'Outfit';font-style:normal;font-weight:500;font-display:swap;src:url(fonts/Outfit-500.woff2) format('woff2')}
@font-face{font-family:'Outfit';font-style:normal;font-weight:600;font-display:swap;src:url(fonts/Outfit-600.woff2) format('woff2')}
@font-face{font-family:'Outfit';font-style:normal;font-weight:700;font-display:swap;src:url(fonts/Outfit-700.woff2) format('woff2')}
@font-face{font-family:'Space Mono';font-style:normal;font-weight:400;font-display:swap;src:url(fonts/SpaceMono-400.woff2) format('woff2')}
@font-face{font-family:'Space Mono';font-style:normal;font-weight:700;font-display:swap;src:url(fonts/SpaceMono-700.woff2) format('woff2')}

:root{
    color-scheme:dark;
    --bg:#15110D;
    --panel:#211913;
    --panel2:#2b211a;
    --ink:#EDE6DA;
    --ink-dim:#9C9186;
    --line:#3a2e24;
    --root:#F4B43C;
    --triad:#4FC4B8;
    --fifth:#F2766B;
    --seventh:#A88BF0;
    --tension:#C0A6F0;
    --rel:#B79CF0;
    --other:#B7C2C9;
    --gold:#F4B43C;
    --wire:#B9B2A6;
    --on-gold:#1a120a;
    --hover-bg:rgba(255,255,255,.05);
    --hover-border:#5a4632;
    --btn-border-idle:rgba(237,230,218,.12);
    --chip-border:rgba(237,230,218,.28);
    --chip-on-border:rgba(26,18,10,.35);
    --scroll-thumb:#4a3a2c;
    --modal-overlay:rgba(8,5,3,.72);
    --modal-shadow:rgba(0,0,0,.55);
    --board-shadow:rgba(0,0,0,.7);
    --session-tag:rgba(237,230,218,.72);
    --session-on-tag:rgba(26,18,10,.72);
    --session-on-desc:rgba(26,18,10,.78);
    --session-entry-bg:linear-gradient(145deg, rgba(244,180,60,.12) 0%, rgba(167,139,240,.16) 52%, rgba(33,25,19,.55) 100%);
    --session-entry-inset:inset 0 1px 0 rgba(255,255,255,.05);
    --session-entry-hover-shadow:inset 0 1px 0 rgba(255,255,255,.06), 0 6px 18px rgba(0,0,0,.22);
    --caption-rel:#7fd6cc;
    --caged-disabled:rgba(237,230,218,.38);
    --caged-disabled-border:rgba(237,230,218,.1);
    --board-open-fill:rgba(21,17,13,.5);
    --board-open-fill-ghost:rgba(21,17,13,.25);
    --board-scale-fade:rgba(108,100,92,.42);
    --board-chord-stroke:rgba(255,248,235,.94);
    --board-prog-preview-stroke:rgba(255,248,235,.55);
    --board-prog-preview-fill:rgba(255,248,235,.72);
    --board-voicing-fill:rgba(237,230,218,.04);
    --board-voicing-stroke:rgba(237,230,218,.42);
    --board-voicing-prog-fill:rgba(244,180,60,.07);
    --board-voicing-prog-stroke:rgba(244,180,60,.78);
    --board-mute-x:rgba(237,230,218,.55);
    --board-dot-stroke:rgba(0,0,0,.2);
    --board-dot-stroke-light:rgba(0,0,0,.18);
    --board-ghost-text:rgba(237,230,218,.45);
    --board-ghost-text2:rgba(237,230,218,.5);
    --board-chromatic-fill:rgba(156,145,134,.15);
    --board-chromatic-text:rgba(237,230,218,.42);
    --dot-text-root:#3a2606;
    --dot-text-other:#10201f;
    --font-sans:'Outfit','Hiragino Sans','Hiragino Kaku Gothic ProN','BIZ UDPGothic','Noto Sans JP','Yu Gothic UI','Meiryo',system-ui,sans-serif;
    --font-mono:'Space Mono','Outfit','Hiragino Sans','Hiragino Kaku Gothic ProN','Noto Sans JP',ui-monospace,monospace;
  }
  *{box-sizing:border-box}
  html{background:var(--bg)}
  html,body{margin:0;padding:0;background:var(--bg) !important;color:var(--ink);
    height:100%;overflow:hidden;
    font-family:var(--font-sans);-webkit-font-smoothing:antialiased}
  body{height:100dvh;height:100svh}
  /* Board fades in after first JS paint; chrome stays visible for faster LCP */
  #board{opacity:0;transition:opacity .18s ease}
  html.ready #board{opacity:1}
  .wrap{max-width:980px;margin:0 auto;padding:14px 16px 0;padding-bottom:env(safe-area-inset-bottom,0);
    height:100dvh;height:100svh;display:flex;flex-direction:column}

  /* ---- toolbar (brand + utility) ---- */
  .toolbar{display:flex;align-items:flex-start;justify-content:space-between;gap:10px;margin-bottom:6px}
  .brandtitle{margin:0;font-family:'Space Mono',monospace;font-weight:700;
    text-transform:uppercase;letter-spacing:.12em;color:var(--gold);
    font-size:23px;line-height:1.15}
  .brandsub{margin:0 0 14px;color:var(--ink-dim);font-size:13.5px;line-height:1.4;
    max-width:42ch}
  @media(max-width:430px){
    .brandtitle{font-size:19px;letter-spacing:.06em}
    .brandsub{font-size:12.5px}
  }
  .eyebrow{font-family:'Space Mono',monospace;font-size:11px;letter-spacing:.26em;
    text-transform:uppercase;color:var(--gold);opacity:.85}
  .tbtns{display:inline-flex;gap:6px}
  .langbtn{font-family:'Space Mono',monospace;font-size:12px;font-weight:700;letter-spacing:.04em;line-height:1;
    padding:6px 12px;border-radius:8px;background:var(--panel);color:var(--ink-dim);
    border:1px solid var(--line);cursor:pointer;transition:background .15s,color .15s,border-color .15s}
  @media(hover:hover){.langbtn:hover{color:var(--gold);border-color:var(--gold)}}

  /* ---- board (the hero, near the top) ---- */
  .board-scroll{overflow-x:auto;
    border-radius:14px;border:1px solid var(--line);background:var(--panel)}
  .board-scroll::-webkit-scrollbar{height:8px}
  .board-scroll::-webkit-scrollbar-thumb{background:var(--scroll-thumb);border-radius:4px}
  svg{display:block;width:100%;height:auto;min-width:1150px;aspect-ratio:1416/270;pointer-events:auto}
  .scrollhint{display:none;font-family:'Space Mono',monospace;font-size:11px;
    color:var(--ink-dim);text-align:right;margin:6px 4px 0;letter-spacing:.04em}

  /* ---- legend (compact, under the board) ---- */
  .legend{display:flex;flex-wrap:wrap;gap:6px 14px;margin-top:12px;font-size:12px;
    color:var(--ink-dim);min-height:20px;line-height:1.3}
  .legend span{display:inline-flex;align-items:center;gap:6px}
  .swatch{width:11px;height:11px;border-radius:50%;display:inline-block}

  /* ---- caption (quiet, contextual one-liner) ---- */
  .caption{font-family:var(--font-sans);font-size:12px;line-height:1.55;
    color:var(--ink-dim);margin:8px 2px 0}
  .caption b{color:var(--gold);font-weight:700}
  .caption .anchor{color:var(--triad)}
  .caption .rel{color:var(--caption-rel);font-weight:700}

  /* ---- control deck (scrolls with .stage, not independently) ---- */
  .deck{margin-top:0;display:flex;flex-direction:column;gap:12px;
    flex:0 0 auto;padding:14px 0 0;width:100%;min-width:0}

  /* keys */
  .keys{display:flex;flex-wrap:wrap;gap:6px;margin:0;min-height:40px}
  .keys button{font-family:'Space Mono',monospace;font-size:14px;font-weight:700;
    min-width:42px;height:40px;padding:0 4px;border-radius:9px;cursor:pointer;
    background:var(--panel);color:var(--ink-dim);border:1px solid var(--line);
    transition:transform .12s ease, background .15s, color .15s, border-color .15s;
    touch-action:manipulation;-webkit-tap-highlight-color:transparent}
  .keys button:hover{transform:translateY(-1px);color:var(--ink)}
  .keys button.active{background:var(--gold);color:var(--on-gold);border-color:var(--gold)}
  .keys button:focus-visible{outline:2px solid var(--gold);outline-offset:2px}

  /* toggles row (mode + label) */
  .toggles{display:flex;flex-wrap:wrap;gap:10px}

  /* segmented controls + scale buttons */
  .scalewrap{display:flex;flex-direction:column;align-items:flex-start;gap:8px;margin:0}
  .scalebar{display:flex;flex-wrap:wrap;width:auto;gap:6px}
  .scalebar button{font-family:var(--font-sans);font-size:13px;font-weight:600;padding:9px 13px;border-radius:8px;
    background:var(--panel);color:var(--ink-dim);border:1px solid var(--line);cursor:pointer;transition:background .15s,color .15s,border-color .15s}
  .scalebar button:hover{color:var(--ink);border-color:var(--hover-border)}
  .scalebar button.on{background:rgba(244,180,60,.18);color:var(--gold);border-color:var(--gold)}
  .scalebar button:focus-visible{outline:2px solid var(--gold);outline-offset:-2px}

  .seg{display:inline-flex;flex-wrap:wrap;gap:6px}
  .seg button{font-family:var(--font-sans);font-size:13px;font-weight:500;padding:9px 14px;border-radius:8px;
    background:var(--panel);color:var(--ink-dim);border:1px solid var(--line);cursor:pointer;transition:background .15s,color .15s,border-color .15s;
    touch-action:manipulation;-webkit-tap-highlight-color:transparent}
  .seg button:hover{color:var(--ink);border-color:var(--hover-border)}
  .seg button.on{background:rgba(244,180,60,.18);color:var(--gold);border-color:var(--gold)}
  .seg button:focus-visible{outline:2px solid var(--gold);outline-offset:-2px}
  .seg button:disabled{opacity:.35;cursor:not-allowed}
  .modebar button{font-weight:600;padding:9px 14px}
  .modebar button.on{background:var(--gold);color:var(--on-gold);border-color:var(--gold)}

  .deck-modes{
    display:flex;
    flex-direction:column;
    align-items:flex-start;
    gap:0;
    width:100%;
  }
  .deck-modes-theory{width:100%}
  .deck-modes-label{
    display:block;
    margin:0 0 6px 2px;
    font-family:'Space Mono',monospace;
    font-size:10px;
    font-weight:700;
    letter-spacing:.14em;
    text-transform:uppercase;
    color:var(--ink-dim);
  }
  .session-entry{
    width:auto;
    max-width:100%;
    margin-top:10px;
  }
  .session-entry-btn{
    display:inline-flex;
    flex-direction:column;
    align-items:flex-start;
    gap:3px;
    width:auto;
    max-width:min(100%, 272px);
    padding:9px 14px 10px;
    border-radius:12px;
    cursor:pointer;
    text-align:left;
    touch-action:manipulation;
    -webkit-tap-highlight-color:transparent;
    color:var(--ink-dim);
    border:1px solid var(--line);
    background:transparent;
    box-shadow:none;
    transition:transform .14s ease, border-color .15s, box-shadow .15s, background .15s, color .15s;
  }
  @media(hover:hover){
    .session-entry-btn:hover{
      color:var(--ink);
      border-color:var(--hover-border);
      background:var(--hover-bg);
    }
  }
  .session-entry-btn.on,
  .session-entry-btn.on:hover{
    color:var(--on-gold);
    border-color:rgba(255,228,170,.7);
    background:linear-gradient(145deg, #f0b84a 0%, #d9a24a 40%, #a88bf0 100%);
    box-shadow:0 0 0 1px rgba(244,180,60,.3), 0 6px 20px rgba(167,139,240,.24);
    transform:none;
  }
  .session-entry-btn:focus-visible{
    outline:2px solid rgba(167,139,240,.9);
    outline-offset:2px;
  }
  .session-entry-kicker{
    display:flex;
    align-items:center;
    gap:7px;
    flex:0 0 auto;
    margin:0;
  }
  .session-entry-badge{
    font-family:'Space Mono',monospace;
    font-size:9px;
    font-weight:700;
    letter-spacing:.1em;
    line-height:1;
    padding:3px 6px;
    border-radius:5px;
    color:var(--ink-dim);
    background:rgba(237,230,218,.1);
    border:1px solid var(--line);
  }
  .session-entry-btn.on .session-entry-badge{
    color:var(--on-gold);
    background:rgba(26,18,10,.14);
    border-color:transparent;
  }
  .session-entry-tag{
    font-family:var(--font-sans);
    font-size:10px;
    font-weight:700;
    letter-spacing:.06em;
    color:var(--ink-dim);
  }
  .session-entry-btn.on .session-entry-tag{color:var(--session-on-tag)}
  .session-entry-title{
    font-family:var(--font-sans);
    font-size:14px;
    font-weight:700;
    line-height:1.15;
    letter-spacing:.02em;
    flex:0 0 auto;
  }
  .session-entry-desc{
    font-family:var(--font-sans);
    font-size:11px;
    line-height:1.35;
    color:var(--ink-dim);
    max-width:24ch;
  }
  .session-entry-btn.on .session-entry-desc{color:var(--session-on-desc)}

  .btn{font-family:var(--font-sans);font-size:13px;font-weight:600;padding:9px 16px;border-radius:10px;
    background:var(--panel);color:var(--ink);border:1px solid var(--line);cursor:pointer;
    display:inline-flex;align-items:center;gap:8px;transition:transform .12s,border-color .15s}
  @media(hover:hover){.btn:hover{transform:translateY(-1px);border-color:var(--gold)}}
  .btn:focus-visible{outline:2px solid var(--gold);outline-offset:2px}
  .btn.on{background:var(--gold);color:var(--on-gold);border-color:var(--gold)}
  .btn:disabled{opacity:.4;cursor:not-allowed}

  /* advanced controls (always visible) */
  .morebox{display:flex;flex-direction:column;flex-wrap:nowrap;gap:18px;
    padding-top:12px;border-top:1px solid var(--line)}

  /* board dots */
  .dot{cursor:pointer}
  .dot text{font-family:'Space Mono',monospace;font-weight:700;pointer-events:none;
    text-anchor:middle;dominant-baseline:central}
  .dot circle{transform-box:fill-box;transform-origin:center}
  .dot circle.prog-dot-pop{animation:prog-dot-pop .36s ease-out}
  @keyframes prog-dot-pop{
    0%,100%{transform:scale(1)}
    45%{transform:scale(1.28)}
  }
  .prog-preview-ring{pointer-events:none}
  .prog-preview-fill{pointer-events:none}
  .prog-preview-lbl{pointer-events:none}
  .dot.prog-chord-tone text{font-size:12px;font-weight:700}
  .dot.prog-scale-fade{cursor:pointer}
  .reduced .dot circle, .reduced .dot text, .reduced .winbox{transition:none !important}
  .reduced .dot circle.prog-dot-pop{animation:none}
  .winbox{fill:rgba(244,180,60,.07);stroke:var(--gold);stroke-width:1.5;
    stroke-dasharray:5 4;rx:10;transition:x .42s cubic-bezier(.34,.9,.3,1),width .42s}

  /* CAGED focus control */
  .cagedctl{display:none;flex-wrap:wrap;gap:6px;align-items:center;width:100%}
  .cagedctl.show{display:flex}
  .cagedctl button{font-family:'Space Mono',monospace;font-size:12px;font-weight:700;
    padding:7px 11px;border-radius:8px;background:var(--panel);border:1px solid var(--line);
    color:var(--ink-dim);cursor:pointer;transition:background .15s,color .15s,border-color .15s,opacity .15s}
  .cagedctl button:disabled{cursor:default;pointer-events:none}
  .cagedctl.off button:disabled{opacity:.42;color:var(--caged-disabled);border-color:var(--caged-disabled-border)}
  .cagedctl.off button:disabled .cdot{opacity:.45}
  .cagedctl button.on{background:rgba(244,180,60,.18);color:var(--gold);border-color:var(--gold)}
  .cagedctl button:hover{color:var(--ink)}
  .cagedctl button:focus-visible{outline:2px solid var(--gold);outline-offset:2px}
  .cagedctl .hint{font-family:var(--font-sans);font-size:12px;line-height:1.35;color:var(--ink-dim);padding:0}
  .cagedctl button .cdot{display:inline-block;width:9px;height:9px;border-radius:50%;
    margin-right:6px;vertical-align:-1px;box-shadow:0 0 0 1px rgba(0,0,0,.25)}

  /* diatonic chord strip */
  .di-tonality{display:flex;gap:6px;margin:0}
  .dia{display:none;gap:12px;margin:0;align-items:flex-start;width:100%}
  .dia.show{display:flex;flex-wrap:wrap}
  .diahead{flex:0 0 auto;display:flex;align-items:center;gap:10px;padding-top:6px}
  .dia .dlabel{font-family:var(--font-sans),sans-serif;font-size:11px;font-weight:600;
    color:var(--ink-dim);white-space:nowrap}
  .diachords{flex:1 1 auto;display:flex;flex-wrap:wrap;gap:6px}
  .dia button{flex:0 0 auto;display:flex;flex-direction:column;align-items:center;gap:1px;min-width:48px;
    padding:6px 10px;border-radius:8px;background:var(--panel);border:1px solid var(--line);
    color:var(--ink-dim);cursor:pointer;transition:background .15s,color .15s,border-color .15s}
  .dia button .rn{font-family:'Space Mono',monospace;font-size:10px;color:var(--ink-dim);line-height:1}
  .dia button .nm{font-family:var(--font-sans);font-size:14px;font-weight:600;line-height:1.15;color:inherit}
  @media(hover:hover){.dia button:hover{color:var(--ink)}}
  .dia button.on{background:rgba(244,180,60,.18);border-color:var(--gold)}
  .dia button.on .nm,.dia button.on .rn{color:var(--gold)}
  .dia button:focus-visible{outline:2px solid var(--gold);outline-offset:2px}
  .dia .di7chk{display:inline-flex;align-items:center;gap:6px;
    font-family:var(--font-sans);font-size:12px;font-weight:600;color:var(--ink-dim);cursor:pointer;
    padding:2px 4px;user-select:none;-webkit-user-select:none}
  .dia .di7chk .box{width:15px;height:15px;border-radius:3px;border:1.5px solid var(--ink-dim);box-sizing:border-box;
    display:inline-flex;align-items:center;justify-content:center;font-size:11px;line-height:1;color:var(--on-gold);background:transparent}
  .dia .di7chk.on{color:var(--gold)}
  .dia .di7chk.on .box{background:var(--gold);border-color:var(--gold)}
  @media(hover:hover){.dia .di7chk:hover{color:var(--ink)} .dia .di7chk:hover .box{border-color:var(--gold)}}

  /* chord progression (prototype) */
  .progpanel{display:flex;flex-direction:column;align-items:flex-start;gap:10px;width:100%}
  .progpanel.hidden{display:none}
  .prog-block{display:flex;flex-direction:column;align-items:flex-start;gap:10px;width:fit-content;max-width:100%}
  .prog-presets{align-self:flex-start}
  .prog-presets{display:flex;flex-wrap:wrap;gap:6px;width:auto}
  .prog-presets button{display:inline-flex;flex-direction:column;align-items:flex-start;gap:2px;
    text-align:left;line-height:1.2;max-width:100%;
    font-family:var(--font-sans),sans-serif;padding:7px 11px;border-radius:8px;
    background:var(--panel);border:1px solid var(--line);color:var(--ink-dim);cursor:pointer;
    transition:background .15s,color .15s,border-color .15s;
    touch-action:manipulation;-webkit-tap-highlight-color:transparent}
  .prog-preset-name{font-size:12.5px;font-weight:600;line-height:1.15}
  .prog-preset-sub{font-family:'Space Mono',monospace;font-size:9px;font-weight:500;
    color:var(--ink-dim);letter-spacing:.01em;line-height:1.25}
  .prog-presets button.on .prog-preset-sub{color:rgba(244,180,60,.78)}
  .prog-seq .prog-arr-mid{padding:0 4px;opacity:.55;font-weight:700}
  @media(hover:hover){.prog-presets button:hover{color:var(--ink)}}
  .prog-presets button.on{background:rgba(244,180,60,.18);color:var(--gold);border-color:var(--gold)}
  .prog-nowcard{display:flex;flex-wrap:nowrap;align-items:center;justify-content:flex-start;gap:10px;
    box-sizing:border-box;width:fit-content;max-width:100%;
    padding:10px 12px;border-radius:10px;background:rgba(244,180,60,.08);
    border:1px solid rgba(244,180,60,.35)}
  .prog-now-main{display:flex;align-items:baseline;gap:8px;flex:0 1 auto;min-width:0}
  .prog-now-tag{font-family:var(--font-sans),sans-serif;font-size:11px;font-weight:700;
    letter-spacing:.08em;color:var(--gold);text-transform:uppercase;flex:0 0 auto}
  .prog-now-name{font-family:'Space Mono',monospace;font-size:22px;font-weight:700;
    color:var(--ink);line-height:1.1;flex:0 0 auto;white-space:nowrap}
  .prog-now-rn{font-family:'Space Mono',monospace;font-size:13px;font-weight:700;color:var(--gold);
    flex:0 1 auto;min-width:0;white-space:nowrap}
  .prog-beats{display:flex;gap:6px;flex:0 0 auto;margin-left:auto;padding-left:12px}
  .prog-beat{width:28px;height:28px;border-radius:50%;display:flex;align-items:center;justify-content:center;
    font-family:'Space Mono',monospace;font-size:11px;font-weight:700;
    background:var(--panel);border:1.5px solid var(--line);color:var(--ink-dim);
    transition:background .12s,border-color .12s,color .12s,transform .12s}
  .prog-beat.on{background:var(--gold);border-color:var(--gold);color:var(--on-gold);transform:scale(1.08)}
  .prog-seq{display:flex;flex-wrap:wrap;align-items:center;gap:4px;width:auto;align-self:flex-start}
  .prog-seq .prog-arr{font-family:'Space Mono',monospace;font-size:11px;color:var(--ink-dim);
    padding:0 2px;user-select:none}
  .prog-chord{display:flex;flex-direction:column;align-items:center;gap:1px;min-width:44px;
    padding:5px 8px;border-radius:8px;background:var(--panel);border:1.5px solid var(--line);
    color:var(--ink-dim);cursor:default;transition:background .15s,border-color .15s,color .15s}
  .prog-chord .rn{font-family:'Space Mono',monospace;font-size:9px;line-height:1}
  .prog-chord .nm{font-family:var(--font-sans),sans-serif;font-size:12px;font-weight:600;line-height:1.15}
  .prog-chord.on{background:rgba(244,180,60,.22);border-color:var(--gold);color:var(--gold)}
  .prog-chord.on .nm,.prog-chord.on .rn{color:var(--gold)}
  .prog-chord.next{border-color:rgba(244,180,60,.45);color:var(--ink)}
  .prog-chord.next .rn{color:var(--gold);opacity:.85}
  .prog-chord.edit{border-color:var(--gold);box-shadow:0 0 0 2px rgba(244,180,60,.28);color:var(--ink)}
  .prog-chord.edit .rn,.prog-chord.edit .nm{color:var(--gold)}
  .prog-chord.drag-source{opacity:.42;transform:scale(.96)}
  .prog-chord.drag-over{border-color:var(--seventh);box-shadow:0 0 0 2px rgba(167,139,240,.38)}
  .prog-seq-dragging{touch-action:none}
  .prog-seq-dragging button.prog-chord{cursor:grabbing}
  button.prog-chord{cursor:pointer;font:inherit;touch-action:manipulation;-webkit-tap-highlight-color:transparent}
  @media(hover:hover){button.prog-chord:hover{border-color:rgba(244,180,60,.55);color:var(--ink)}}
  .prog-custom{display:flex;flex-direction:column;align-items:flex-start;gap:10px;max-width:100%}
  .prog-custom.hidden{display:none}
  .prog-custom-row{display:flex;flex-wrap:wrap;align-items:center;gap:8px;width:100%}
  .prog-custom-lbl{font-family:'Space Mono',monospace;font-size:10px;font-weight:700;
    letter-spacing:.12em;text-transform:uppercase;color:var(--ink-dim);flex:0 0 auto}
  .prog-bars-seg button{min-width:38px;padding:7px 10px;font-size:12px;font-weight:700}
  .prog-custom-tools{width:auto;max-width:100%;align-self:flex-start;flex-wrap:nowrap;gap:10px}
  .prog-custom-hint{margin:0;font-family:'Space Mono',monospace;font-size:9px;line-height:1.4;
    letter-spacing:.04em;color:var(--ink-dim);width:100%}
  .prog-custom-hint.hidden{display:none}
  .prog-custom-preset{display:inline-flex;align-items:center;gap:6px;flex:0 1 auto;min-width:0}
  .prog-custom-select{flex:0 1 auto;min-width:0;max-width:168px;padding:6px 8px;border-radius:8px;
    font-family:var(--font-sans);font-size:12px;font-weight:600;color:var(--ink);
    background:var(--panel);border:1px solid var(--line);cursor:pointer}
  .prog-custom-select:focus{outline:2px solid var(--gold);outline-offset:1px;border-color:var(--gold)}
  .prog-toolbtn{font-family:var(--font-sans);font-size:12px;font-weight:600;padding:6px 10px;border-radius:8px;
    background:var(--panel);border:1px solid var(--line);color:var(--ink-dim);cursor:pointer;
    touch-action:manipulation;-webkit-tap-highlight-color:transparent;white-space:nowrap;flex:0 0 auto;
    margin-left:2px}
  @media(hover:hover){.prog-toolbtn:hover{color:var(--ink);border-color:var(--gold)}}
  .prog-toolbtn.on{background:rgba(244,180,60,.18);color:var(--gold);border-color:var(--gold)}
  .prog-toolbtn:focus-visible{outline:2px solid var(--gold);outline-offset:2px}
  .prog-custom-pick{display:flex;flex-direction:column;align-items:flex-start;gap:8px;width:100%}
  .prog-custom-pick.hidden{display:none}
  .prog-custom-chords{display:flex;flex-wrap:wrap;gap:6px;width:100%}
  .prog-custom-chords button{display:flex;flex-direction:column;align-items:center;gap:1px;min-width:44px;
    padding:6px 9px;border-radius:8px;background:transparent;border:1px solid var(--line);
    color:var(--ink-dim);cursor:pointer;transition:background .15s,border-color .15s,color .15s;
    touch-action:manipulation;-webkit-tap-highlight-color:transparent}
  .prog-custom-chords button .rn{font-family:'Space Mono',monospace;font-size:9px;line-height:1}
  .prog-custom-chords button .nm{font-family:var(--font-sans);font-size:12px;font-weight:600;line-height:1.15}
  @media(hover:hover){.prog-custom-chords button:hover{color:var(--ink);border-color:rgba(244,180,60,.45)}}
  .prog-custom-chords button.on{background:rgba(244,180,60,.18);border-color:var(--gold);color:var(--gold)}
  .prog-custom-chords button.on .nm,.prog-custom-chords button.on .rn{color:var(--gold)}
  .prog-custom-section-lbl{flex:0 0 100%;margin:4px 0 0;font-family:'Space Mono',monospace;
    font-size:9px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-dim)}
  .prog-custom-section-lbl:first-child{margin-top:0}
  .prog-chord.borrowed .rn{color:var(--seventh);opacity:.92}
  .prog-chord.borrowed.on .rn,.prog-chord.borrowed.edit .rn{color:var(--gold);opacity:1}
  .prog-transport{display:flex;flex-wrap:wrap;align-items:center;gap:10px 14px;width:auto;margin-top:4px}
  .prog-play{font-family:var(--font-sans),sans-serif;font-size:13px;font-weight:700;
    padding:8px 16px;border-radius:8px;background:var(--panel);border:1px solid var(--line);
    color:var(--ink);cursor:pointer;min-width:88px;flex:0 0 auto;position:relative;z-index:2;
    touch-action:manipulation;-webkit-tap-highlight-color:transparent}
  .prog-play.on{background:rgba(244,180,60,.22);border-color:var(--gold);color:var(--gold)}
  .prog-bpm{display:flex;align-items:center;gap:8px;font-family:var(--font-sans),sans-serif;
    font-size:12px;color:var(--ink-dim);flex:0 0 auto}
  .prog-bpm input[type=range]{width:180px;flex:0 0 180px;min-width:180px;max-width:180px;
    accent-color:var(--gold);touch-action:pan-y}
  .prog-bpm-num{width:3.4em;min-width:3.4em;padding:4px 6px;border-radius:6px;
    font-family:'Space Mono',monospace;font-size:12px;font-weight:700;color:var(--gold);
    background:var(--panel);border:1px solid var(--line);text-align:center;
    -moz-appearance:textfield;appearance:textfield}
  .prog-bpm-num:focus{outline:2px solid var(--gold);outline-offset:1px;border-color:var(--gold)}
  .prog-bpm-num::-webkit-outer-spin-button,.prog-bpm-num::-webkit-inner-spin-button{
    -webkit-appearance:none;margin:0}
  .prog-step{font-family:var(--font-sans);font-size:11px;color:var(--ink-dim);
    flex:0 0 11.5em;width:11.5em;text-align:right;line-height:1.35;white-space:nowrap;overflow:hidden}

  .hidden{display:none !important}

  .site-footer{margin-top:30px;padding:16px 0 0;border-top:1px solid var(--line);
    font-family:'Space Mono',monospace;font-size:12px;color:var(--ink-dim);
    text-align:center;letter-spacing:.12em}

  /* ---- manual modal ---- */
  .modal-bg{position:fixed;inset:0;background:var(--modal-overlay);backdrop-filter:blur(3px);
    display:none;align-items:center;justify-content:center;z-index:1000;padding:16px}
  .modal-bg.open{display:flex}
  .modal{background:var(--panel);border:1px solid var(--line);border-radius:14px;
    width:100%;max-width:660px;max-height:86vh;display:flex;flex-direction:column;
    overflow:hidden;box-shadow:0 20px 60px var(--modal-shadow)}
  .modal-head{display:flex;align-items:center;justify-content:space-between;
    padding:16px 20px;border-bottom:1px solid var(--line);
    position:sticky;top:0;background:var(--panel);flex:0 0 auto}
  .modal-head h2{margin:0;font-size:17px;font-weight:700;color:var(--gold);letter-spacing:.02em;font-family:var(--font-sans)}
  .modal-close{font-size:20px;line-height:1;background:none;border:none;color:var(--ink-dim);
    font-family:var(--font-sans);
    cursor:pointer;padding:4px 8px;border-radius:8px;transition:color .15s,background .15s}
  @media(hover:hover){.modal-close:hover{color:var(--gold);background:rgba(244,180,60,.1)}}
  .modal-body{overflow-y:auto;padding:18px 20px 26px;-webkit-overflow-scrolling:touch;
    font-family:var(--font-sans)}
    color:var(--ink);font-size:14px;line-height:1.75}
  .modal-body h3{color:var(--gold);font-size:15px;font-weight:700;margin:1.7em 0 .5em;letter-spacing:.02em}
  .modal-body h3:first-child{margin-top:0}
  .modal-body p{margin:.7em 0;color:var(--ink)}
  .modal-body ul{margin:.6em 0;padding-left:1.3em}
  .modal-body li{margin:.35em 0}
  .modal-body ol{margin:.6em 0;padding-left:1.4em}
  .modal-body ol li{margin:.4em 0}
  .modal-body .lead{color:var(--ink-dim);font-size:13.5px}
  .modal-body blockquote{margin:.9em 0;padding:.6em .9em;border-left:3px solid var(--gold);
    background:rgba(244,180,60,.06);border-radius:0 8px 8px 0;color:var(--ink-dim);font-size:13.5px}
  .modal-body hr{border:none;border-top:1px solid var(--line);margin:1.6em 0}

  @media (max-width:760px){
    .scrollhint{display:block}
    .wrap{padding:12px 12px 0}
    .site-footer{margin-top:20px}
  }
  @media (max-width:600px){
    .keys{min-height:86px}
    .legend{min-height:36px}
    .paramgroup{padding-left:8px}
    .prog-now-name{font-size:18px}
    .prog-transport{align-items:center}
    .prog-bpm{flex:0 0 auto;width:auto}
    .prog-bpm input[type=range]{width:160px;flex:0 0 160px;min-width:160px;max-width:160px}
    .prog-step{width:11.5em;flex:0 0 11.5em;text-align:right}
  }
  @media (max-width:430px){
    .prog-presets button{font-size:12px;padding:7px 9px}
    .prog-nowcard{padding:8px 10px;gap:8px}
    .prog-beat{width:26px;height:26px;font-size:10px}
  }

  /* ===================================================================
     Mockup redesign overrides (board-first, minimal, rotation model)
     =================================================================== */
  /* unselected controls recede into the page; only the selected one is gold */
  /* exclusive (radio-like) buttons: transparent fill, but keep an outline so they read as buttons */
  .keys button{background:transparent;border-color:var(--line)}
  @media(hover:hover){.keys button:hover{background:var(--hover-bg);color:var(--ink);border-color:var(--hover-border)}}
  .keys button.active{background:var(--gold);color:var(--on-gold);border-color:var(--gold)}
  .seg button{background:transparent;border-color:var(--line)}
  @media(hover:hover){.seg button:hover{background:var(--hover-bg);border-color:var(--hover-border);color:var(--ink)}}
  .scalebar button{background:transparent;border-color:var(--line)}
  @media(hover:hover){.scalebar button:hover{background:var(--hover-bg);border-color:var(--hover-border);color:var(--ink)}}
  .cagedctl button{background:transparent;border-color:var(--line)}

  /* below-board bar: degree/note + chromatic (left) + scroll hint (right) */
  .belowboard{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:10px;min-height:40px}
  .board-labels{display:flex;align-items:center;gap:16px;flex-shrink:0}
  .board-labels .toggle{white-space:nowrap}
  .belowboard .scrollhint{display:none;margin:0}
  @media(max-width:760px){.belowboard .scrollhint{display:block}}

  /* the explanation lives in the 使い方 modal — hide the always-on legend & caption */
  #legend,#caption{display:none !important}

  /* deck spacing + lens-first */
  .modebar{align-self:flex-start}
  .deck-modes{align-self:stretch}

  /* keys + picker grouped by indent + spacing (no decorative line) */
  .paramgroup{display:flex;flex-direction:column;align-items:flex-start;gap:13px;
    border-left:none;padding-left:14px}

  /* scale picker groups: modes 1-7, then a gap, then pentatonics, then other minors */
  .scalewrap .pents,.scalewrap .others,.scalewrap .tensgroup{margin-top:11px}

  /* gold root token on each scale button — matches the gold root on the board */
  .scale-btn{display:inline-flex;align-items:center}
  .scale-btn .scale-lbl{flex-shrink:0}
  .scale-btn .rn{display:inline-flex;align-items:center;justify-content:center;
    flex-shrink:0;width:30px;min-width:30px;height:19px;padding:0;margin-left:8px;border-radius:10px;
    background:var(--gold);color:var(--on-gold);font-family:'Space Mono',monospace;
    font-size:11px;font-weight:700;line-height:1}
  .scale-btn .rn:empty{display:none}

  /* advanced controls: stacked, behavior-based groups with quiet labels */
  .moregroup{display:flex;flex-direction:column;align-items:flex-start;gap:9px;width:100%}
  #cagedwrap .cagedctl{margin-top:11px}
  #cagedwrap .cagedctl.hint-only{margin-top:0}
  .eyebrow2{font-family:'Space Mono',monospace;font-size:10px;letter-spacing:.18em;
    text-transform:uppercase;color:var(--ink-dim);opacity:.85}

  /* overlays as on/off layer toggles (leading dot lights up) */
  .overlays{display:flex;flex-wrap:wrap;gap:8px}
  .toggle{display:inline-flex;align-items:center;gap:8px;font-family:var(--font-sans);font-size:13px;font-weight:600;
    padding:8px 13px;border-radius:9px;background:transparent;border:1px solid transparent;
    color:var(--ink-dim);cursor:pointer;transition:color .15s,background .15s;
    touch-action:manipulation;-webkit-tap-highlight-color:transparent}
  .toggle::before{content:'';width:16px;height:16px;border-radius:4px;
    border:1.5px solid var(--ink-dim);box-sizing:border-box;transition:all .15s;
    display:inline-flex;align-items:center;justify-content:center;
    font-family:var(--font-sans);font-size:12px;line-height:1;color:var(--on-gold)}
  @media(hover:hover){.toggle:hover{color:var(--ink)}}
  .toggle.on{color:var(--ink)}
  .toggle.on::before{content:'✓';background:var(--gold);border-color:var(--gold)}
  .toggle:disabled{opacity:.4;cursor:not-allowed}
  .toggle:focus-visible{outline:2px solid var(--gold);outline-offset:2px}

  /* diatonic chord cards on transparent bg (still bordered = "these are chords") */
  .dia button{background:transparent}

  /* ===================================================================
     Pro polish v2 — gold reserved for selection, calmer field, rhythm
     =================================================================== */
  /* (B) resting buttons recede: much fainter outline so the field is calm */
  .keys button,.seg button,.scalebar button,.cagedctl button,.dia button{
    border-color:var(--btn-border-idle)}
  @media(hover:hover){
    .keys button:hover,.seg button:hover,.scalebar button:hover{
      background:var(--hover-bg);border-color:rgba(244,180,60,.45);color:var(--ink)}
  }

  /* (A) ONE selected treatment for top-level toggles: solid gold + dark ink */
  .scalebar button.on,.seg button.on{
    background:var(--gold);color:var(--on-gold);border-color:var(--gold)}
  .cagedctl button.on,.dia button.on{
    background:rgba(244,180,60,.18);border-color:var(--gold)}
  .cagedctl button.on{color:var(--gold)}
  .dia button.on .nm,.dia button.on .rn{color:var(--gold)}

  /* (C) demote the root token to a quiet OUTLINE chip. Case A: resting chips are
     NEUTRAL (grey) — gold is reserved strictly for the selected button, which
     turns its chip gold/dark on selection. The note stays visible for pre-compare. */
  .scale-btn .rn{
    background:transparent;border:1px solid var(--chip-border);
    color:var(--ink-dim);font-weight:700}
  .scale-btn.on .rn{               /* selected button is solid gold → dark chip */
    background:transparent;border-color:var(--chip-on-border);color:var(--on-gold)}

  /* (D) consistent vertical rhythm */
  .deck{gap:14px}
  .paramgroup{gap:14px}
  .scalewrap{gap:8px}
  .scalewrap .pents,.scalewrap .others,.scalewrap .tensgroup{margin-top:14px}

  /* ===================================================================
     Layout: .wrap is a full-viewport flex column.
     .apphead stays fixed; .stage is the sole scroll container.
     .boardcol (board + degree/note toggle) is sticky at the top of .stage.
     .deck + footer scroll together below it.
     body/html are overflow:hidden so page-level scroll (and iOS rubber-
     band bounce) can never move the header or board.
     =================================================================== */
  .stage{display:flex;flex-direction:column;flex:1 1 0;min-height:0;
    overflow-y:auto;overflow-x:hidden;-webkit-overflow-scrolling:touch}

  .boardcol{flex:0 0 auto;position:sticky;top:0;background:var(--bg);
    padding-bottom:10px;box-shadow:0 10px 14px -10px var(--board-shadow);z-index:5;
    pointer-events:none}
  .boardcol .board-scroll,.boardcol .belowboard{pointer-events:auto}

  @media (min-width:900px){
    .wrap{max-width:1240px}
  }

  :root{--head-h:66px}
  @media(max-width:430px){:root{--head-h:60px}}
  .apphead{flex:0 0 auto;background:var(--bg);padding:4px 0 10px;z-index:6}
  .toolbar{margin:0;padding:0}
  .brandsub{margin:0}

  /* Phone landscape only: board left, controls right */
  @media (orientation:landscape) and (max-height:520px){
    .wrap{padding:8px 10px 0}
    .brandsub{display:none}
    .apphead{padding:0 0 6px}
    .brandtitle{font-size:17px;letter-spacing:.08em}

    .stage{
      flex-direction:row;align-items:stretch;gap:10px;
      overflow:hidden}

    .boardcol{
      position:static;flex:0 0 54%;min-width:0;
      padding-bottom:0;box-shadow:none;
      overflow-x:hidden;overflow-y:auto;
      -webkit-overflow-scrolling:touch}

    .belowboard{margin-top:6px;min-height:32px}
    .board-labels{gap:12px}
    .belowboard .scrollhint{font-size:10px}

    .deck{
      flex:1 1 0;min-width:0;min-height:0;
      overflow-y:auto;overflow-x:hidden;
      -webkit-overflow-scrolling:touch;
      padding:0 0 0 10px;
      border-left:1px solid var(--line);
      gap:10px}

    .paramgroup{padding-left:8px;gap:10px}
    .keys button{min-width:36px;height:36px;font-size:13px}
    .scalebar button,.seg button{font-size:12px;padding:8px 10px}
    .site-footer{margin-top:12px;padding:12px 0}
  }

  /* iPad portrait + landscape (1-column): breathing room around footer */
  @media (orientation:portrait) and (min-width:744px),
         (orientation:landscape) and (min-height:521px){
    .stage{padding-bottom:16px}
    .site-footer{margin-top:32px;padding:20px 0 20px}
  }