:root{
    --bg:#0f1216; --panel:#161b21; --panel2:#1d242c; --text:#e8edf2; --muted:#8b97a3;
    --accent:#4dd0a7; --amber:#f2c14e; --danger:#e5644e; --grid:#232b34;
    color-scheme:dark;
  }
  select option{background:var(--panel2);color:var(--text)}
  select:focus-visible{outline:2px solid var(--accent);outline-offset:1px}
  *{box-sizing:border-box}
  [hidden]{display:none!important}
  html,body{margin:0;height:100%}
  body{background:var(--bg);color:var(--text);overflow:hidden;
    font:14px/1.5 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}

  /* ---------- layout: ocupa a janela toda menos uma pequena margem ---------- */
  .app{
    position:fixed; inset:10px;
    display:grid;
    grid-template-columns:400px 1fr;   /* esquerda fixa em 400px (abaixo disso a engrenagem estoura) */
    gap:10px;
  }
  .col{display:grid;gap:10px;min-width:0;min-height:0}
  .col-left{grid-template-rows:1fr}       /* painel Treinos ocupa toda a altura */
  .col-right{grid-template-rows:4fr 1fr}  /* contorno 80% · linha de baixo 20% */
  .botrow{display:grid;grid-template-columns:1.7fr 1fr;gap:10px;min-width:0;min-height:0}

  .panel{
    background:var(--panel);border:1px solid var(--grid);border-radius:12px;
    display:flex;flex-direction:column;min-width:0;min-height:0;overflow:hidden;
  }
  .panel-hd{
    flex:0 0 auto;padding:7px 12px;font-size:11px;font-weight:650;
    text-transform:uppercase;letter-spacing:.09em;color:var(--muted);
    border-bottom:1px solid var(--grid);display:flex;justify-content:space-between;gap:8px;align-items:center;
  }
  .panel-hd .aside{font-weight:600;letter-spacing:.04em;text-transform:none}
  /* título + ícone: botão que abre a tela de boas-vindas (só a área do próprio título reage ao mouse) */
  .hd-brand{display:flex;align-items:center;gap:6px;background:none;border:0;padding:4px 6px;margin:-4px -6px;
    font:inherit;letter-spacing:inherit;text-transform:inherit;color:inherit;cursor:pointer;border-radius:7px;white-space:nowrap}
  .hd-brand:hover{color:var(--text)}
  .hd-brand:hover .brandmark{opacity:1}
  .hd-brand .brandmark{width:16px;height:16px;flex:0 0 auto;opacity:.85}
  .panel-hd.gcfg{text-transform:none;letter-spacing:0;font-weight:600;
    justify-content:flex-start;flex-wrap:wrap;gap:8px 18px;padding:6px 12px}
  .panel-hd.gcfg label{display:flex;align-items:center;gap:6px;color:var(--muted);font-size:11px}
  .panel-hd.gcfg .gcfg-voc{display:flex;align-items:center;flex-wrap:wrap;gap:8px 14px}
  /* mapa dos 100 compassos, embaixo do gráfico: mostra a janela, o loop, as notas e onde o treino está */
  .time-nav{flex:0 0 auto;display:flex;align-items:center;gap:10px;padding:5px 10px;border-top:1px solid var(--grid)}
  .time-nav[hidden]{display:none}
  .tn-lbl{flex:0 0 auto;font-size:11px;font-weight:600;color:var(--muted);white-space:nowrap}
  canvas.tn-map{position:relative;inset:auto;flex:1 1 auto;width:auto;height:30px;min-width:0;touch-action:none;
    border-radius:6px;cursor:ew-resize}
  .undo-grp,.tool-grp{display:flex;align-items:center;gap:6px}
  /* ferramentas + desfazer/refazer + ajuda: um bloco só, encostado à direita (quebra de linha junto, sem separar o ? dos outros) */
  .hd-actions{display:flex;align-items:center;gap:6px;margin-left:auto}
  .tool-grp{padding-right:10px;margin-right:2px;border-right:1px solid var(--grid)}
  .help-btn{font-weight:800;font-size:14px;line-height:1;padding:0;width:30px;height:30px}
  .undo-grp[hidden],.tool-grp[hidden]{display:none}
  .undo-grp .hd-btn svg,.tool-grp .hd-btn svg{width:15px;height:15px}
  .tool-grp .hd-btn.on{color:var(--accent);border-color:var(--accent);background:rgba(77,208,167,.14)}
  .panel-hd.gcfg select{font:inherit;font-size:11px;background:var(--panel2);
    color:var(--text);border:1px solid var(--grid);border-radius:6px;padding:3px 6px}
  .panel-hd.gcfg .dash{color:var(--muted);margin:0 -2px}
  .panel-hd.gcfg .chk{cursor:pointer;user-select:none}
  .panel-hd.gcfg .chk input{width:14px;height:14px;accent-color:var(--accent);cursor:pointer;margin:0}
  .panel-hd.gcfg label:has(select:disabled),
  .panel-hd.gcfg .chk:has(input:disabled){opacity:.4}
  .panel-hd.gcfg select:disabled,.panel-hd.gcfg input:disabled{cursor:not-allowed}
  .panel-bd{flex:1 1 auto;min-height:0;min-width:0;position:relative}
  canvas{position:absolute;inset:0;width:100%;height:100%;display:block;background:transparent}

  /* ---------- painel frequência / afinação (ao lado do espectro) ---------- */
  .rd{display:flex;flex-direction:column;justify-content:center;gap:4px;padding:8px 14px;overflow:hidden}
  #noteName{font-size:clamp(22px,4.4vh,40px);font-weight:750;line-height:1;font-variant-numeric:tabular-nums}
  #noteName small{font-size:.45em;color:var(--muted);font-weight:650}
  #hz{font-size:clamp(14px,2.6vh,20px);color:var(--amber);font-variant-numeric:tabular-nums}
  .metric{color:var(--muted);font-size:10px;text-transform:uppercase;letter-spacing:.09em}
  .metric .hint{text-transform:none;letter-spacing:0;font-weight:400;font-size:9px;opacity:.75;margin-left:6px}
  .centsbar{position:relative;height:10px;background:var(--panel2);border-radius:6px;overflow:hidden;margin-top:4px}
  .centsbar .mid{position:absolute;left:50%;top:0;bottom:0;width:2px;background:#3a4756;transform:translateX(-1px)}
  .centsbar .fill{position:absolute;top:0;bottom:0;width:0;background:var(--accent);transition:all .08s}
  .pill{display:inline-block;margin-left:8px;padding:1px 8px;border-radius:999px;font-size:.32em;
    font-weight:650;background:rgba(77,208,167,.15);color:var(--accent);visibility:hidden;vertical-align:middle}

  /* ---------- painel esquerdo: controles e configurações ---------- */
  .cfg{display:flex;flex-direction:column;gap:13px;padding:14px;overflow-y:auto}
  #trainPanel{position:relative;overflow:visible}
  .gear{background:transparent;border:0;color:var(--muted);font-size:15px;line-height:1;
    padding:2px 5px;cursor:pointer;border-radius:6px}
  .gear:hover{color:var(--text);background:var(--panel2);filter:none}
  .hd-tools{display:flex;align-items:center;gap:8px}
  .hd-btn{background:transparent;border:1px solid var(--grid);border-radius:7px;
    width:30px;height:26px;display:flex;align-items:center;justify-content:center;
    padding:0;font-size:13px;line-height:1;color:var(--muted);cursor:pointer}
  .hd-btn:hover{filter:none;color:var(--text);border-color:var(--muted)}
  .hd-btn:disabled{opacity:.35;cursor:not-allowed}
  .hd-btn:disabled:hover{color:var(--muted);border-color:var(--grid)}
  .authBtn{background:transparent;border:1px solid var(--grid);border-radius:7px;
    height:26px;display:flex;align-items:center;gap:6px;padding:0 8px;
    font:inherit;font-size:11px;font-weight:600;color:var(--muted);cursor:pointer;max-width:120px}
  .authBtn:hover{color:var(--text);border-color:var(--muted)}
  .authBtn.on{color:var(--text)}
  .authBtn .authAvatar{width:16px;height:16px;border-radius:50%;flex:0 0 auto;background:var(--panel2)}
  .authBtn .authLabel{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  .authBtn[hidden]{display:none}
  #micBtn.on{color:var(--accent);border-color:var(--accent);background:rgba(77,208,167,.12)}
  .play{color:#2f7d64}                       /* verde apagado (treino parado) */
  .play .tri{width:0;height:0;border-style:solid;border-width:6px 0 6px 10px;
    border-color:transparent transparent transparent currentColor}
  .play.on{color:var(--accent);border-color:var(--accent);background:rgba(77,208,167,.16);
    box-shadow:0 0 10px rgba(77,208,167,.5)}   /* verde aceso (treino em curso) */
  .play.on .tri{width:10px;height:10px;border-width:0;background:currentColor;border-radius:1.5px}   /* treino em curso: o triângulo vira um quadrado (parar) */
  .rec{color:#e5644e}
  .rec .dot{width:9px;height:9px;border-radius:50%;background:currentColor}
  .rec.on{border-color:#e5644e;background:rgba(229,100,78,.18);
    box-shadow:0 0 10px rgba(229,100,78,.55);animation:rec-pulse 1.1s ease-in-out infinite}
  @keyframes rec-pulse{0%,100%{opacity:1}50%{opacity:.55}}
  .lvl{width:52px;height:8px;background:var(--panel2);border:1px solid var(--grid);
    border-radius:4px;overflow:hidden}
  .lvl>div{height:100%;width:0;background:var(--accent);transition:width .06s}
  .settings-pop{position:absolute;top:34px;left:10px;right:10px;z-index:30;
    background:var(--panel2);border:1px solid var(--grid);border-radius:10px;padding:12px;
    display:flex;flex-direction:column;gap:10px;box-shadow:0 12px 34px rgba(0,0,0,.5)}
  .settings-pop .sp-sec{font-size:10px;text-transform:uppercase;letter-spacing:.09em;
    color:var(--muted);border-bottom:1px solid var(--grid);padding-bottom:5px}
  .settings-pop label{display:flex;flex-direction:column;gap:4px;font-size:12px;color:var(--muted)}
  .settings-pop select{font:inherit;background:var(--panel);color:var(--text);
    border:1px solid var(--grid);border-radius:7px;padding:7px 8px}
  .seg-src{display:none}
  .seg{display:flex;border:1px solid var(--grid);border-radius:7px;overflow:hidden;background:var(--panel)}
  .seg button{flex:1;font:inherit;font-size:12px;color:var(--muted);background:transparent;border:0;
    border-right:1px solid var(--grid);padding:7px 4px;cursor:pointer}
  .seg button:last-child{border-right:0}
  .seg button:hover{color:var(--text)}
  .seg button.on{background:rgba(77,208,167,.18);color:var(--accent);font-weight:700}
  .settings-pop .sp-check{flex-direction:row;align-items:center;gap:8px;cursor:pointer}
  .settings-pop .sp-check input{width:14px;height:14px;flex:0 0 auto;accent-color:var(--accent)}
  .settings-pop .sp-check:has(input:disabled){opacity:.45;cursor:not-allowed}
  .settings-pop .sp-check input:disabled{cursor:not-allowed}
  .settings-pop .sp-brand{display:flex;align-items:center;gap:8px;font-size:14px;font-weight:800}
  .settings-pop .sp-brand .brandmark{width:20px;height:20px;flex:0 0 auto}
  .settings-pop .sp-version{font-size:11px;color:var(--muted)}
  .settings-pop .sp-credit{font-size:10px;line-height:1.4;color:var(--muted);border-top:1px solid var(--grid);padding-top:8px;display:flex;flex-direction:column;gap:3px}
  .settings-pop .sp-note{font-size:10px;line-height:1.4;color:var(--muted);margin-top:-4px}
  /* aviso de piano vazando pro microfone: fixo embaixo, sem bloquear a tela */
  .echo-hint{position:fixed;left:50%;transform:translateX(-50%);bottom:calc(14px + env(safe-area-inset-bottom));
    z-index:45;width:min(460px,calc(100vw - 24px));padding:10px 12px;display:flex;flex-direction:column;gap:8px;
    background:var(--panel2);border:1px solid var(--amber);border-radius:10px;box-shadow:0 8px 24px rgba(0,0,0,.55);
    font-size:12px;line-height:1.4;color:var(--text)}
  .echo-hint[hidden]{display:none}
  .echo-hint b{color:var(--amber)}
  .echo-hint-btns{display:flex;flex-wrap:wrap;gap:6px}
  .echo-hint-btns button{font:inherit;font-size:12px;padding:7px 10px;border-radius:7px;cursor:pointer;
    background:transparent;border:1px solid var(--grid);color:var(--muted)}
  .echo-hint-btns button:hover{color:var(--text);border-color:var(--muted)}
  .echo-hint-btns button.primary{background:rgba(77,208,167,.16);border-color:var(--accent);color:var(--accent);font-weight:650}
  .train{display:flex;flex-direction:column;gap:5px;font-weight:650}
  .train .train-hd{display:flex;align-items:center;justify-content:space-between;gap:8px}
  .train-hd-btns{display:flex;align-items:center;gap:6px}
  .train select{font:inherit;font-weight:650;background:var(--panel2);color:var(--text);
    border:1px solid var(--grid);border-radius:8px;padding:8px}
  .loop-cfg{display:flex;flex-direction:column;gap:9px}
  /* seções recolhíveis (Opções / Pontuações): só no celular - fora dele o cabeçalho some e tudo fica aberto */
  .sec-hd{display:none}
  .sec-bd{display:flex;flex-direction:column;gap:9px}
  .scroll-strip{display:none}
  .loop-cfg label{display:flex;flex-direction:column;gap:4px;font-size:12px;color:var(--muted)}
  .loop-cfg select,.loop-cfg input[type=number]{font:inherit;background:var(--panel2);color:var(--text);
    border:1px solid var(--grid);border-radius:7px;padding:7px 8px}
  .loop-cfg .chk{flex-direction:row;align-items:center;gap:8px;font-weight:650;color:var(--text);cursor:pointer;user-select:none}
  .loop-cfg .chk input{width:16px;height:16px;accent-color:var(--accent);cursor:pointer;margin:0}
  .loop-cfg .wk-row{display:flex;flex-direction:row;gap:5px;align-items:stretch}
  .loop-cfg .wk-row select{flex:1;min-width:0}
  #lWorkout.dirty{color:var(--danger);border-color:var(--danger)}
  #lWorkout.dirty option{color:var(--text)}
  #lWorkout,#pSel{font-size:12.5px}          /* nomes de treino (longos): letra um pouco menor; no celular segue 16px, p/ o iPhone não dar zoom ao tocar */
  .loop-cfg .wk-warn{font-size:10px;color:var(--amber);line-height:1.4;margin-top:-2px}
  .wk-btn{flex:0 0 auto;display:flex;align-items:center;justify-content:center;width:30px;padding:0;
    background:var(--panel2);color:var(--muted);border:1px solid var(--grid);border-radius:7px;cursor:pointer}
  .wk-btn:hover{color:var(--text);border-color:var(--muted);filter:none}
  .wk-btn.danger:hover{color:var(--danger);border-color:var(--danger)}
  .wk-btn.ok{color:var(--accent);border-color:var(--accent)}
  .wk-btn:disabled{opacity:.32;cursor:default}
  .wk-btn:disabled:hover{color:var(--muted);border-color:var(--grid)}
  .wk-btn svg{width:15px;height:15px;display:block}
  /* treino livre: cantar a partir de um arquivo de áudio */
  .file-panel{display:flex;flex-direction:column;gap:8px;padding:10px;border:1px solid var(--grid);border-radius:9px;background:var(--panel2)}
  .file-panel .wk-row{display:flex;flex-direction:row;gap:5px;align-items:stretch}
  .file-panel .wk-btn{background:var(--panel)}
  .file-panel .wk-btn.pre-copy{width:auto;padding:0 10px;gap:6px;font-size:12px;min-height:30px}
  .file-panel .file-name{flex:1;min-width:0;align-self:center;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:12px;color:var(--muted);font-weight:600}
  .file-panel .file-name.has{color:var(--text)}
  .file-panel .file-ctl{align-items:center}
  .file-panel .file-ctl .wk-btn{min-height:30px}
  .file-panel #fSpan,.file-panel #fRange{font-size:11px}
  .file-panel .file-act{flex:1;width:auto;padding:5px 8px;min-height:32px;font-size:11.5px;font-weight:650;line-height:1.2;text-align:center}
  .file-panel .file-act[aria-pressed="true"]{color:var(--accent);border-color:var(--accent);background:rgba(77,208,167,.12)}
  .file-panel .file-time{margin-left:auto;font-size:11.5px;color:var(--muted);font-variant-numeric:tabular-nums;white-space:nowrap}
  .file-panel .file-vol{display:flex;flex-direction:row;align-items:center;gap:10px;font-size:12px;font-weight:650;color:var(--text)}
  .file-panel .file-vol input[type=range]{flex:1;width:auto;margin:0;accent-color:var(--accent);cursor:pointer}
  .file-panel .file-vol b{flex:0 0 auto;min-width:2.6em;text-align:right;font-weight:600;font-size:11px}
  .file-panel .pre-note{font-size:11px;color:var(--muted);line-height:1.35}
  /* Meus treinos | Treinos prontos */
  .mode-tabs{display:flex;border:1px solid var(--grid);border-radius:7px;overflow:hidden;background:var(--panel)}
  .mode-tabs button{flex:1;font:inherit;font-size:12px;color:var(--muted);background:transparent;border:0;
    border-right:1px solid var(--grid);padding:7px 4px;cursor:pointer}
  .mode-tabs button:last-child{border-right:0}
  .mode-tabs button:hover{color:var(--text)}
  .mode-tabs button.on{background:rgba(77,208,167,.18);color:var(--accent);font-weight:700}
  .pre-panel{display:flex;flex-direction:column;gap:9px}
  .loop-cfg .pre-panel>select{width:100%}
  .pre-note{font-size:11px;color:var(--muted);line-height:1.35}
  .wk-btn.pre-copy{width:auto;padding:0 10px;gap:6px;font-size:12px}
  .wk-btn.pre-copy span{white-space:nowrap}
  #pRange:disabled,#pStart:disabled{opacity:.55}
  #preVocRow label{flex:1;min-width:0}
  .loop-cfg .loop-row{display:flex;flex-direction:row;gap:8px}
  .loop-cfg .loop-row label{flex:1;gap:3px}
  .loop-cfg .loop-row select,.loop-cfg .loop-row input[type=number]{width:100%}
  .loop-cfg .vol-row{display:flex;flex-direction:row;align-items:center;gap:10px}
  .loop-cfg .vol-row .chk{flex:0 0 8.5em;white-space:nowrap}
  .loop-cfg .vol-row input[type=range]{flex:1;width:auto;margin:0}
  .loop-cfg .vol-row b{flex:0 0 auto;min-width:2.6em;text-align:right;color:var(--text);font-weight:600;font-size:11px}
  .loop-cfg .opt-row{display:flex;flex-direction:row;align-items:center;flex-wrap:wrap;gap:8px 16px}
  .loop-cfg .opt-sub{display:flex;flex-direction:column;gap:4px}
  .loop-cfg .chk-sm{gap:6px;font-weight:600;font-size:11px;color:var(--muted)}
  .loop-cfg .chk-sm input{width:13px;height:13px}
  .loop-cfg .chk:has(input:disabled){opacity:.45;cursor:not-allowed}
  .loop-cfg .chk:has(input:disabled) input{cursor:not-allowed}
  .loop-cfg .ghost{align-self:start;font-size:11px;padding:5px 10px}
  .loop-cfg label b{color:var(--text);font-weight:600}
  .loop-cfg input[type=range]{width:100%;accent-color:var(--accent);margin:2px 0;cursor:pointer}
  .loop-scores{display:flex;flex-direction:column;gap:5px;margin-top:2px}
  .cur-strip{font-size:11px;color:var(--accent);font-variant-numeric:tabular-nums;
    padding:5px 8px;border:1px dashed var(--grid);border-radius:7px;background:var(--panel2)}
  .cur-strip.idle{color:var(--muted)}
  .scbtns{display:flex;gap:8px;flex-wrap:wrap}
  .ls-list th[data-k],.atttab th[data-k]{cursor:pointer;user-select:none}
  .ls-list th[data-k]:hover,.atttab th[data-k]:hover{color:var(--text)}
  .ls-list th[data-k].sk::after,.atttab th[data-k].sk::after{content:" \25be";font-size:8px}
  .ls-list th[data-k].sk.asc::after,.atttab th[data-k].sk.asc::after{content:" \25b4"}
  .ls-list{overflow-y:auto;border:1px solid var(--grid);border-radius:7px}
  .ls-list.ls-top{max-height:none}
  .ls-list.ls-all{max-height:132px}
  .ls-list table{width:100%;border-collapse:collapse;font-size:11px;font-variant-numeric:tabular-nums}
  .ls-list th{padding:3px 8px;text-align:right;color:var(--muted);font-weight:600;font-size:9px;
    text-transform:uppercase;letter-spacing:.04em;border-bottom:1px solid var(--grid);
    white-space:nowrap;position:sticky;top:0;background:var(--panel)}
  .ls-list th:first-child{text-align:left;width:3.4em}
  .ls-list th:nth-child(2),.ls-list td:nth-child(2){text-align:center}
  .ls-list td{padding:3px 8px;border-bottom:1px solid var(--grid);color:var(--text);text-align:right}
  .ls-list td:first-child{text-align:left;color:var(--muted)}
  .ls-list td:last-child{font-weight:600}
  .ls-list tr:last-child td{border-bottom:0}
  .ls-list tr.best td{color:var(--amber)}
  .ls-list tr.empty td{text-align:center;color:var(--muted)}
  #graph{touch-action:none;user-select:none;-webkit-user-select:none;-webkit-touch-callout:none}
  button{font:inherit;font-weight:650;border:0;border-radius:9px;padding:9px 16px;cursor:pointer;
    background:var(--accent);color:#06231c;transition:filter .12s}
  button:hover{filter:brightness(1.06)}
  button.on{background:var(--danger);color:#2a0b06}
  #status{font-size:12px;color:var(--danger)}
  #status:empty{display:none}
  #status .err{color:var(--danger)}
  .sep{border:0;border-top:1px solid var(--grid);margin:2px 0}
  .muted{color:var(--muted);font-size:12px}

  .target{display:flex;flex-direction:column;gap:12px}
  .tgt-controls{display:flex;flex-direction:column;gap:10px}
  .stepper{display:flex;align-items:center;gap:6px}
  .stepper button{padding:8px 12px;background:var(--panel2);color:var(--text);font-size:16px;line-height:1}
  .stepper select{flex:1;font:inherit;background:var(--panel2);color:var(--text);
    border:1px solid var(--grid);border-radius:7px;padding:7px 8px}
  #tgtPlay{background:var(--amber);color:#2a2101}
  #tgtPlay.on{background:var(--danger);color:#2a0b06}
  button.ghost{background:transparent;border:1px solid var(--grid);color:var(--muted);font-weight:600;padding:7px 12px}
  .attempts{display:flex;flex-direction:column;gap:5px}
  .att-list{overflow:auto;border:1px solid var(--grid);border-radius:7px}
  .att-list.att-all{max-height:132px}
  .atttab{width:100%;border-collapse:collapse;font-size:11px;font-variant-numeric:tabular-nums}
  .atttab th,.atttab td{text-align:right;padding:3px 7px;border-bottom:1px solid var(--grid);white-space:nowrap}
  .atttab th:first-child,.atttab td:first-child{text-align:left;color:var(--muted);width:3.4em}
  .atttab th:nth-child(2),.atttab td:nth-child(2){text-align:center;color:var(--muted)}
  .atttab th{color:var(--muted);font-weight:600;font-size:9px;text-transform:uppercase;letter-spacing:.03em;
    position:sticky;top:0;background:var(--panel)}
  .atttab tbody:empty::after{content:""}
  .atttab tr:last-child td{border-bottom:0}
  .atttab tr.cur td{color:var(--accent)}
  .atttab tr.best td:last-child{color:var(--amber);font-weight:700}
  .atttab tr.empty td{text-align:center;color:var(--muted);border:0;padding-top:6px}
  .attempts .ghost{align-self:start;font-size:11px;padding:5px 10px}

  /* ---------- fallback para telas estreitas ---------- */
  @media (max-width:820px){
    html,body{height:auto}
    body{overflow-y:auto}
    .app{position:static;inset:auto;margin:6px max(4px,env(safe-area-inset-right)) 6px max(4px,env(safe-area-inset-left));
      padding-bottom:84px;gap:8px;display:flex;flex-direction:column}   /* folga embaixo p/ os botões flutuantes */
    .col,.botrow{display:contents}
    .panel{height:auto}
    #trainPanel{min-height:auto}
    /* gráfico sem bordas laterais, de ponta a ponta da tela: mais espaço pra editar */
    .col-right>.panel:first-child{height:max(56vh,340px);margin:0 -4px;border-left:0;border-right:0;border-radius:0}   /* contorno */
    .panel-hd,.panel-hd.gcfg{padding-left:8px;padding-right:8px}
    /* Opções e Pontuações viram seções que abrem e fecham (fechadas por padrão: o gráfico aparece logo) */
    .sec{display:flex;flex-direction:column}
    .sec-hd{display:flex;align-items:center;justify-content:space-between;width:100%;min-height:44px;padding:0 12px;
      background:var(--panel2);border:1px solid var(--grid);border-radius:8px;color:var(--text);
      font:inherit;font-size:13px;font-weight:650;cursor:pointer;text-align:left}
    .sec-chev{width:8px;height:8px;border-right:2px solid var(--muted);border-bottom:2px solid var(--muted);
      transform:rotate(45deg);margin:-3px 4px 0 0;transition:transform .15s}
    .sec:not(.collapsed) .sec-chev{transform:rotate(225deg);margin-top:3px}
    .sec-bd{padding-top:9px}
    .sec.collapsed .sec-bd{display:none}
    /* play / gravar flutuantes: sempre ao alcance do polegar enquanto se edita o gráfico */
    .train-hd-btns{position:fixed;right:calc(14px + env(safe-area-inset-right));
      bottom:calc(14px + env(safe-area-inset-bottom));z-index:40;flex-direction:column-reverse;gap:12px}
    .train-hd-btns .hd-btn{width:54px;height:54px;border-radius:50%;border-width:2px;
      background:var(--panel2);box-shadow:0 6px 18px rgba(0,0,0,.5)}
    .train-hd-btns .play .tri{border-width:9px 0 9px 15px}
    .train-hd-btns .play.on .tri{width:16px;height:16px;border-width:0}
    .train-hd-btns .rec .dot{width:14px;height:14px}
    .echo-hint{left:12px;transform:none;width:auto;right:calc(84px + env(safe-area-inset-right))}   /* não cobre os botões flutuantes */
    .botrow>.panel:first-child{height:26vh}       /* espectro */
    .botrow>.panel:last-child{min-height:128px}   /* frequência/afinação */
  }

  /* celular deitado (pouca altura): o gráfico ocupa a tela toda e vem primeiro; o resto fica abaixo */
  @media (max-width:820px) and (orientation:landscape) and (max-height:520px){
    .col-right>.panel:first-child{order:-1;height:calc(100vh - 12px);min-height:240px}
    .botrow>.panel:first-child{height:70vh}
    /* o gráfico captura todo toque (notas, rolagem das alturas, zoom): sem uma área livre não dá pra
       rolar a página. Esta faixa na borda direita rola a página normalmente (touch-action: pan-y) */
    .scroll-strip{display:flex;align-items:center;justify-content:center;position:absolute;top:0;bottom:0;right:0;
      width:44px;z-index:4;touch-action:pan-y;border-left:1px solid var(--grid);
      background:linear-gradient(to left,rgba(255,255,255,.05),transparent)}
    .scroll-strip::before{content:"\25B2\A\22EE\A\25BC";white-space:pre;text-align:center;line-height:1.35;
      font-size:13px;color:var(--muted)}
    .train-hd-btns{right:calc(56px + env(safe-area-inset-right))}   /* ao lado da faixa, não por cima */
  }

  /* tablet em paisagem (duas colunas, mas com toque): margem da página menor */
  @media (pointer:coarse) and (min-width:821px){
    .app{inset:6px;gap:6px}
  }

  /* telas de toque: alvos de 44 px, fontes de 16 px nos campos (o iPhone amplia a página abaixo disso) */
  @media (pointer:coarse){
    html{-webkit-tap-highlight-color:transparent}
    body{overscroll-behavior-y:contain}
    .hd-btn{width:44px;height:44px}
    .undo-grp .hd-btn,.tool-grp .hd-btn,.help-btn{width:42px;height:38px}
    canvas.tn-map{height:40px}
    .gear{min-width:44px;min-height:44px;font-size:20px}
    .authBtn{height:44px;max-width:150px;font-size:12px}
    .wk-btn{width:44px;min-height:44px}
    .loop-cfg #wkRow{flex-wrap:wrap}                      /* 6 botões de 44 px não deixam espaço p/ o nome: o seletor ocupa uma linha e os botões dividem a de baixo */
    .loop-cfg #wkRow select{flex:1 1 100%}
    .loop-cfg #wkRow .wk-btn{flex:1 1 0}
    button.ghost,.loop-cfg .ghost,.attempts .ghost{min-height:44px;padding:8px 14px;font-size:13px}
    .scbtns{gap:6px}
    .loop-cfg .scbtns .ghost{padding:8px 10px}
    select,input[type=number],.train select,.stepper select,.loop-cfg select,.loop-cfg input[type=number],
    .settings-pop select,.panel-hd.gcfg select{font-size:16px;min-height:44px}
    .panel-hd.gcfg select{min-height:40px}
    .loop-cfg .chk,.settings-pop .sp-check,.panel-hd.gcfg .chk{min-height:44px;font-size:13px}
    .loop-cfg .chk input,.settings-pop .sp-check input,.panel-hd.gcfg .chk input{width:22px;height:22px}
    .loop-cfg .chk-sm{font-size:13px}
    .loop-cfg .chk-sm input{width:20px;height:20px}
    .loop-cfg .vol-row .chk{flex-basis:10em}
    .seg button,.mode-tabs button{padding:12px 4px;font-size:13px}
    .echo-hint-btns button{min-height:44px}
    .panel-hd.gcfg label:has(#gCenter){display:none}   /* rolar com o dedo substitui o "Centro" */
  }

  /* ---------- janela inicial (boas-vindas / aviso de testes) ---------- */
  .welcome-overlay{
    position:fixed;inset:0;z-index:100;display:flex;align-items:center;justify-content:center;
    background:rgba(6,8,10,.72);backdrop-filter:blur(2px);padding:20px;overflow-y:auto;
  }
  .welcome-card{
    width:100%;max-width:400px;background:var(--panel);border:1px solid var(--grid);
    border-radius:14px;padding:26px 24px;box-shadow:0 24px 60px rgba(0,0,0,.55);
    margin:auto;   /* centraliza, mas deixa rolar (sem cortar o topo) em telas baixas, como o celular deitado */
  }
  /* janela de ajuda (como editar o treino) */
  .help-overlay{z-index:110}
  .help-card{max-width:460px;display:flex;flex-direction:column;align-items:stretch;gap:8px}
  .help-card h2{margin:0 0 4px;font-size:19px;font-weight:800;text-align:center}
  .help-card h3{margin:10px 0 0;font-size:11px;font-weight:700;letter-spacing:.09em;text-transform:uppercase;color:var(--accent)}
  .help-card ul{margin:0;padding-left:18px;display:flex;flex-direction:column;gap:6px}
  .help-card li{font-size:12.5px;line-height:1.5;color:var(--muted)}
  .help-card li b{color:var(--text);font-weight:650}
  .help-card .welcome-btn{margin-top:12px}
  .welcome-card{position:relative}
  .welcome-lang{position:absolute;top:12px;right:12px;display:flex;border:1px solid var(--grid);border-radius:7px;overflow:hidden}
  .welcome-lang button{font:inherit;font-size:11px;font-weight:700;letter-spacing:.04em;padding:5px 9px;color:var(--muted);background:transparent;border:0;cursor:pointer}
  .welcome-lang button + button{border-left:1px solid var(--grid)}
  .welcome-lang button:hover{color:var(--text)}
  .welcome-lang button[aria-pressed="true"]{background:rgba(77,208,167,.18);color:var(--accent)}
  .welcome-brand{display:flex;align-items:center;justify-content:center;gap:10px;margin-bottom:4px}
  .welcome-brand .brandmark{width:clamp(24px,6vw,32px);height:clamp(24px,6vw,32px);flex:0 0 auto}
  .welcome-brand h1{font-size:clamp(21px,5vw,26px);font-weight:800;margin:0;text-align:center}
  .welcome-brand h1 span{color:var(--accent)}
  .welcome-badge{
    display:block;margin:2px auto 16px;padding:2px 10px;border-radius:999px;width:fit-content;
    font-size:10px;font-weight:650;letter-spacing:.08em;text-transform:uppercase;
    background:rgba(242,193,78,.14);color:var(--amber)
  }
  .welcome-text{display:flex;flex-direction:column;gap:10px;margin-bottom:20px}
  .welcome-text p{margin:0;font-size:12.5px;line-height:1.55;color:var(--muted)}
  .welcome-text p.welcome-warn{color:var(--amber)}
  /* logado: foto e nome no lugar do convite pra entrar (classe is-user posta por setWelcomeUser) */
  .welcome-user{display:flex;align-items:center;gap:12px;padding:10px 12px;background:var(--panel2);
    border:1px solid var(--grid);border-radius:10px}
  .welcome-avatar{width:40px;height:40px;border-radius:50%;flex:0 0 auto;background:var(--panel)}
  .welcome-user-tx{display:flex;flex-direction:column;min-width:0}
  .welcome-user-tx span{font-size:11px;color:var(--muted)}
  .welcome-user-tx b{font-size:15px;color:var(--text);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  .welcome-overlay:not(.is-user) .welcome-user,.welcome-overlay:not(.is-user) .welcome-user-only,
  .welcome-overlay.is-user .welcome-guest-only,.welcome-overlay.is-user #welcomeGoogleBtn{display:none}
  /* faixa vocal na tela de boas-vindas */
  .welcome-range{display:flex;flex-direction:column;gap:10px;padding:12px;margin-bottom:16px;background:var(--panel2);border:1px solid var(--grid);border-radius:10px}
  .welcome-range h2{margin:0;font-size:14px;font-weight:750}
  .welcome-range p{margin:0;font-size:12px;line-height:1.5;color:var(--muted)}
  .welcome-chips{display:flex;gap:8px}
  .welcome-chip{flex:1;display:flex;flex-direction:column;align-items:center;gap:2px;padding:8px 6px;border-radius:9px;cursor:pointer;
    font:inherit;background:var(--panel);color:var(--text);border:1px solid var(--grid)}
  .welcome-chip b{font-size:13px;font-weight:700}
  .welcome-chip span{font-size:11px;color:var(--muted)}
  .welcome-chip:hover{border-color:var(--muted)}
  .welcome-chip.on{background:rgba(77,208,167,.14);color:var(--text);border-color:var(--accent);box-shadow:inset 0 0 0 1px var(--accent)}
  .welcome-chip.on span{color:var(--accent)}
  .welcome-range-sel{display:flex;flex-direction:column;gap:4px;font-size:11px;font-weight:650;color:var(--muted)}
  .welcome-range-sel select{font:inherit;font-size:13px;font-weight:650;background:var(--panel);color:var(--text);border:1px solid var(--grid);border-radius:7px;padding:7px 8px}
  .welcome-check{
    display:flex;align-items:center;gap:8px;margin-bottom:16px;
    font-size:12px;color:var(--muted);cursor:pointer;user-select:none
  }
  .welcome-check input{width:14px;height:14px;flex:0 0 auto;accent-color:var(--accent)}
  .welcome-actions{display:flex;flex-direction:column;gap:8px}
  .welcome-btn{
    font:inherit;font-weight:650;font-size:13px;padding:11px 14px;border-radius:10px;
    background:var(--panel2);color:var(--text);border:1px solid var(--grid);cursor:pointer;
  }
  .welcome-btn:hover{border-color:var(--muted)}
  .welcome-btn.primary{background:var(--accent);color:#06231c;border-color:transparent}
  .welcome-btn.primary:hover{filter:brightness(1.06)}
  .welcome-btn:disabled{opacity:.5;cursor:not-allowed}