:root{
    --ink:#1c1b1a;
    --ink-soft:#737278;
    --ink-faint:#a7a6aa;
    --paper:#ffffff;
    --workspace:#e8e8ea;
    --chrome:#f6f6f7;
    --line:#dededf;
    --line-2:#cdcdd0;
    --accent:#25264f;
    --accent-hover:#1a1b3c;
    --accent-active:#131329;
    --accent-soft:#e9e9f1;
    --accent-ink:#ffffff;

    --wordmark:"Courier Prime","Courier New",Courier,monospace;
    --mono:"IBM Plex Mono",ui-monospace,"SFMono-Regular",Menlo,monospace;
    --ui:"Inter",system-ui,-apple-system,"Segoe UI",sans-serif;

    --h-header:64px;
    --h-tabs:46px;
    --radius:9px;
  }

  *{box-sizing:border-box;}
  html,body{height:100%;}
  body{
    margin:0;font-family:var(--ui);color:var(--ink);background:var(--workspace);
    -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  }
  .app{display:flex;flex-direction:column;height:100vh;min-height:0;}

  /* ---------- Header ---------- */
  .header{
    flex:0 0 var(--h-header);display:flex;align-items:center;gap:14px;padding:0 18px;
    background:var(--chrome);border-bottom:1px solid var(--line);position:relative;z-index:40;
  }
  .brand{display:flex;align-items:center;gap:11px;min-width:0;}
  .brand__logo{width:29px;height:29px;flex:0 0 auto;color:var(--ink);display:block;}
  .brand__logo svg{width:100%;height:100%;display:block;}
  .brand__name{font-family:var(--wordmark);font-weight:700;font-size:22px;letter-spacing:-0.01em;line-height:1;white-space:nowrap;}
  .brand__name .tk{color:var(--ink);}
  .brand__name .ty{color:var(--accent);}
  .brand__meta{
    display:flex;align-items:center;gap:9px;padding-left:14px;margin-left:2px;
    border-left:1px solid var(--line-2);font-family:var(--mono);font-size:10.5px;
    letter-spacing:0.14em;text-transform:uppercase;color:var(--ink-faint);white-space:nowrap;
  }
  .header__spacer{flex:1 1 auto;}
  .readout{font-family:var(--mono);font-size:11px;letter-spacing:0.08em;text-transform:uppercase;color:var(--ink-soft);white-space:nowrap;display:flex;align-items:center;gap:7px;}
  .readout .dot{width:6px;height:6px;border-radius:50%;background:var(--ink-faint);box-shadow:0 0 0 3px rgba(0,0,0,0.03);}
  .readout.is-live .dot{background:var(--accent);}
  .readout b{color:var(--ink);font-weight:600;}

  /* ---------- Buttons ---------- */
  .btn{font-family:var(--mono);font-size:12px;letter-spacing:0.04em;display:inline-flex;align-items:center;gap:8px;height:38px;padding:0 14px;border:1px solid var(--line-2);border-radius:8px;background:var(--paper);color:var(--ink);cursor:pointer;transition:border-color .14s,background .14s,box-shadow .14s;}
  .btn:hover{border-color:var(--ink-soft);}
  .btn:active{background:#fafafa;}
  .btn svg{width:16px;height:16px;flex:0 0 auto;}
  .btn:focus-visible{outline:none;box-shadow:0 0 0 3px var(--accent-soft),0 0 0 1px var(--accent);border-color:var(--accent);}
  .btn--accent{background:var(--accent);border-color:var(--accent);color:var(--accent-ink);}
  .btn--accent:hover{background:var(--accent-hover);border-color:var(--accent-hover);}
  .btn--accent:active{background:var(--accent-active);}
  .chev{transition:transform .16s;}
  .is-open .chev{transform:rotate(180deg);}

  /* ---------- Fonts dropdown ---------- */
  .fonts{position:relative;}
  .fonts__count{display:inline-flex;align-items:center;justify-content:center;min-width:20px;height:18px;padding:0 5px;border-radius:999px;background:var(--ink);color:#fff;font-size:10.5px;font-weight:600;font-family:var(--mono);}
  .fonts.is-empty .fonts__count{background:var(--ink-faint);}
  .panel{position:absolute;top:calc(100% + 8px);right:0;width:320px;max-width:min(92vw,320px);background:var(--paper);border:1px solid var(--line-2);border-radius:var(--radius);box-shadow:0 1px 2px rgba(0,0,0,.04),0 18px 40px -18px rgba(0,0,0,.28);overflow:hidden;opacity:0;transform:translateY(-4px) scale(.99);transform-origin:top right;pointer-events:none;transition:opacity .13s,transform .13s;}
  .fonts.is-open .panel{opacity:1;transform:none;pointer-events:auto;}
  .panel__head{display:flex;align-items:center;justify-content:space-between;padding:11px 14px;border-bottom:1px solid var(--line);font-family:var(--mono);font-size:10.5px;letter-spacing:0.14em;text-transform:uppercase;color:var(--ink-soft);}
  .panel__head a{color:var(--accent);text-decoration:none;cursor:pointer;letter-spacing:0.06em;}
  .panel__head a:hover{text-decoration:underline;}
  .panel__body{max-height:min(58vh,420px);overflow:auto;}
  .checkall{display:flex;align-items:center;gap:11px;padding:11px 14px;border-bottom:1px solid var(--line);cursor:pointer;user-select:none;}
  .checkall:hover{background:#fafafa;}
  .checkall .label{font-family:var(--mono);font-size:12px;letter-spacing:0.03em;color:var(--ink);}
  .fgroup{padding:8px 0;border-bottom:1px solid var(--line);}
  .fgroup:last-child{border-bottom:0;}
  .fgroup__name{padding:4px 14px 6px;font-family:var(--mono);font-size:10px;letter-spacing:0.14em;text-transform:uppercase;color:var(--ink-faint);display:flex;align-items:center;justify-content:space-between;gap:8px;}
  .fgroup__name span:first-child{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
  .frow{display:flex;align-items:center;gap:11px;padding:8px 14px;cursor:pointer;user-select:none;position:relative;}
  .frow:hover{background:#fafafa;}
  .frow__style{flex:1 1 auto;min-width:0;display:flex;flex-direction:column;gap:2px;}
  .frow__style .s1{font-size:13px;color:var(--ink);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
  .frow__style .s2{font-family:var(--mono);font-size:10px;letter-spacing:0.05em;color:var(--ink-faint);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
  .frow__spec{font-size:17px;line-height:1;color:var(--ink-soft);white-space:nowrap;flex:0 0 auto;max-width:74px;overflow:hidden;}
  .cbox{flex:0 0 auto;width:18px;height:18px;border-radius:5px;border:1.5px solid var(--line-2);background:var(--paper);display:inline-flex;align-items:center;justify-content:center;transition:background .12s,border-color .12s;}
  .cbox svg{width:12px;height:12px;color:#fff;opacity:0;transform:scale(.6);transition:opacity .1s,transform .1s;}
  [data-checked="true"] .cbox,[data-checked="mixed"] .cbox{background:var(--accent);border-color:var(--accent);}
  [data-checked="true"] .cbox svg,[data-checked="mixed"] .cbox svg{opacity:1;transform:none;}
  .panel__empty{padding:26px 18px 30px;text-align:center;color:var(--ink-soft);}
  .panel__empty .big{font-family:var(--wordmark);font-size:34px;color:var(--line-2);line-height:1;margin-bottom:12px;letter-spacing:.02em;}
  .panel__empty p{margin:0;font-size:12.5px;line-height:1.5;}
  .panel__empty .hint{margin-top:8px;font-family:var(--mono);font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-faint);}

  /* ---------- Tabs ---------- */
  .tabs{flex:0 0 var(--h-tabs);display:flex;align-items:stretch;padding:0 12px;gap:2px;background:var(--chrome);border-bottom:1px solid var(--line);position:relative;z-index:20;}
  .tab{appearance:none;background:none;border:0;cursor:pointer;display:inline-flex;align-items:center;gap:9px;padding:0 15px;font-family:var(--mono);font-size:12px;letter-spacing:0.05em;color:var(--ink-soft);position:relative;transition:color .13s;}
  .tab svg{width:16px;height:16px;stroke-width:1.6;}
  .tab:hover{color:var(--ink);}
  .tab__idx{font-size:10px;color:var(--ink-faint);letter-spacing:0;}
  .tab[aria-selected="true"]{color:var(--ink);}
  .tab[aria-selected="true"] .tab__idx{color:var(--accent);}
  .tab::after{content:"";position:absolute;left:12px;right:12px;bottom:-1px;height:2px;background:var(--accent);border-radius:2px 2px 0 0;transform:scaleX(0);transform-origin:center;transition:transform .16s;}
  .tab[aria-selected="true"]::after{transform:scaleX(1);}
  .tab:focus-visible{outline:none;box-shadow:inset 0 0 0 2px var(--accent-soft);border-radius:6px;}

  /* ---------- Workspace ---------- */
  .work{flex:1 1 auto;min-height:0;position:relative;overflow:hidden;}
  .tabpanel{position:absolute;inset:0;display:none;overflow:hidden;}
  .tabpanel.is-active{display:flex;flex-direction:column;}

  .placeholder{min-height:100%;flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:48px 24px;gap:2px;}
  .placeholder__mark{width:52px;height:52px;color:var(--line-2);margin-bottom:16px;}
  .placeholder__mark svg{width:100%;height:100%;stroke-width:1.4;}
  .placeholder__eyebrow{font-family:var(--mono);font-size:10.5px;letter-spacing:0.18em;text-transform:uppercase;color:var(--accent);margin-bottom:10px;}
  .placeholder h2{font-family:var(--wordmark);font-weight:700;font-size:26px;margin:0 0 8px;color:var(--ink);letter-spacing:-0.01em;}
  .placeholder p{margin:0;max-width:380px;font-size:14px;line-height:1.55;color:var(--ink-soft);}
  .placeholder .stub{margin-top:18px;font-family:var(--mono);font-size:10px;letter-spacing:0.14em;text-transform:uppercase;color:var(--ink-faint);border:1px dashed var(--line-2);border-radius:6px;padding:7px 12px;}

  /* ================= WATERFALL ================= */
  .wf__bar{
    flex:0 0 auto;display:flex;align-items:center;gap:8px 16px;flex-wrap:wrap;
    padding:11px 18px;background:var(--chrome);border-bottom:1px solid var(--line);
  }
  .ctl{display:flex;align-items:center;gap:9px;}
  .ctl__label{font-family:var(--mono);font-size:10px;letter-spacing:0.14em;text-transform:uppercase;color:var(--ink-faint);white-space:nowrap;}

  /* dictionary select */
  .selwrap{position:relative;display:inline-flex;align-items:center;}
  .sel{
    appearance:none;font-family:var(--mono);font-size:12px;color:var(--ink);
    height:34px;padding:0 30px 0 12px;border:1px solid var(--line-2);border-radius:8px;
    background:var(--paper);cursor:pointer;letter-spacing:0.02em;
  }
  .sel:hover{border-color:var(--ink-soft);}
  .sel:focus-visible{outline:none;box-shadow:0 0 0 3px var(--accent-soft),0 0 0 1px var(--accent);border-color:var(--accent);}
  .selwrap .selchev{position:absolute;right:9px;pointer-events:none;color:var(--ink-soft);width:14px;height:14px;}
  .iconbtn{
    display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;
    border:1px solid var(--line-2);border-radius:8px;background:var(--paper);color:var(--ink);cursor:pointer;
    transition:border-color .14s,background .14s,box-shadow .14s,transform .3s;
  }
  .iconbtn:hover{border-color:var(--ink-soft);}
  .iconbtn:active{background:#fafafa;}
  .iconbtn svg{width:16px;height:16px;stroke-width:1.7;}
  .iconbtn:focus-visible{outline:none;box-shadow:0 0 0 3px var(--accent-soft),0 0 0 1px var(--accent);border-color:var(--accent);}

  /* stepper (size + count) */
  .stepper{display:inline-flex;align-items:center;border:1px solid var(--line-2);border-radius:8px;background:var(--paper);height:34px;overflow:hidden;}
  .stepper:focus-within{box-shadow:0 0 0 3px var(--accent-soft),0 0 0 1px var(--accent);border-color:var(--accent);}
  .stepper button{appearance:none;border:0;background:none;width:28px;height:100%;cursor:pointer;color:var(--ink-soft);font-size:16px;line-height:1;display:flex;align-items:center;justify-content:center;transition:background .12s,color .12s;}
  .stepper button:hover{background:#f2f2f4;color:var(--ink);}
  .stepper input{
    width:46px;height:100%;border:0;outline:none;text-align:center;background:none;
    font-family:var(--mono);font-size:13px;color:var(--ink);
    -moz-appearance:textfield;
  }
  .stepper input::-webkit-outer-spin-button,.stepper input::-webkit-inner-spin-button{-webkit-appearance:none;margin:0;}
  .stepper .unit{font-family:var(--mono);font-size:10px;color:var(--ink-faint);padding-right:9px;letter-spacing:.06em;}

  /* length slider */
  .slider{display:flex;align-items:center;gap:10px;}
  .slider input[type=range]{
    -webkit-appearance:none;appearance:none;width:140px;height:4px;border-radius:99px;
    background:linear-gradient(var(--accent),var(--accent)) no-repeat, var(--line-2);
    background-size:var(--fill,50%) 100%;cursor:pointer;
  }
  .slider input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:16px;height:16px;border-radius:50%;background:var(--paper);border:2px solid var(--accent);box-shadow:0 1px 3px rgba(0,0,0,.2);cursor:pointer;}
  .slider input[type=range]::-moz-range-thumb{width:16px;height:16px;border-radius:50%;background:var(--paper);border:2px solid var(--accent);box-shadow:0 1px 3px rgba(0,0,0,.2);cursor:pointer;}
  .slider input[type=range]:focus-visible{outline:none;box-shadow:0 0 0 3px var(--accent-soft);border-radius:99px;}
  .slider .ends{font-family:var(--mono);font-size:10px;color:var(--ink-faint);letter-spacing:.06em;}

  /* case segmented */
  .seg{display:inline-flex;border:1px solid var(--line-2);border-radius:8px;overflow:hidden;background:var(--paper);height:34px;}
  .seg button{appearance:none;border:0;background:none;padding:0 11px;height:100%;cursor:pointer;font-family:var(--ui);font-size:13px;color:var(--ink-soft);border-left:1px solid var(--line);transition:background .12s,color .12s;line-height:1;}
  .seg button:first-child{border-left:0;}
  .seg button:hover{background:#f2f2f4;color:var(--ink);}
  .seg button[aria-pressed="true"]{background:var(--accent);color:var(--accent-ink);}
  .seg button:focus-visible{outline:none;box-shadow:inset 0 0 0 2px var(--accent-soft);}

  .wf__note{flex:0 0 auto;padding:6px 18px;background:var(--chrome);border-bottom:1px solid var(--line);font-family:var(--mono);font-size:10px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-faint);display:flex;align-items:center;gap:8px;}
  .wf__note b{color:var(--ink-soft);font-weight:500;}

  /* scroll area + columns */
  .wf__scroll{flex:1 1 auto;min-height:0;overflow:auto;background:var(--workspace);}
  .wf__cols{display:inline-flex;min-width:100%;align-items:stretch;}
  .wf__gutter,.wf__col{display:flex;flex-direction:column;}
  .wf__gutter{position:sticky;left:0;z-index:3;background:var(--workspace);border-right:1px solid var(--line);}
  .wf__col{border-right:1px solid var(--line);background:var(--paper);}
  .wf__col:nth-child(even){background:#fcfcfd;}

  .wf__head{
    position:sticky;top:0;z-index:2;background:inherit;border-bottom:1px solid var(--line);
    padding:9px 18px;display:flex;flex-direction:column;gap:1px;min-height:44px;justify-content:center;
    box-shadow:0 1px 0 var(--line);
  }
  .wf__gutter .wf__head{background:var(--chrome);}
  .wf__head .h1{font-size:12px;color:var(--ink);white-space:nowrap;font-weight:500;}
  .wf__head .h2{font-family:var(--mono);font-size:9.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-faint);white-space:nowrap;}
  .wf__head--gutter{font-family:var(--mono);font-size:9.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-faint);}

  .wf__cell{
    display:flex;align-items:baseline;padding:0 18px;white-space:nowrap;color:var(--ink);
    border-bottom:1px solid #efeff0;
  }
  .wf__col:nth-child(even) .wf__cell{border-bottom-color:#f2f2f3;}
  .wf__num{font-family:var(--mono);color:var(--ink-faint);padding:0 14px;justify-content:flex-end;border-bottom:1px solid #efeff0;display:flex;align-items:center;}

  .wf__empty{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:48px 24px;color:var(--ink-soft);background:var(--workspace);}
  .wf__empty .mk{width:46px;height:46px;color:var(--line-2);margin-bottom:14px;}
  .wf__empty .mk svg{width:100%;height:100%;stroke-width:1.4;}
  .wf__empty h3{font-family:var(--wordmark);font-weight:700;font-size:20px;margin:0 0 6px;color:var(--ink);}
  .wf__empty p{margin:0;max-width:340px;font-size:13.5px;line-height:1.5;}
  .wf__empty .lil{margin-top:8px;font-family:var(--mono);font-size:10px;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-faint);}
  .spin{width:22px;height:22px;border:2px solid var(--line-2);border-top-color:var(--accent);border-radius:50%;animation:spin .7s linear infinite;margin-bottom:14px;}
  @keyframes spin{to{transform:rotate(360deg);}}

  /* ================= NOTATION ================= */
  .nt__bar{flex:0 0 auto;display:flex;align-items:center;gap:8px 16px;flex-wrap:wrap;padding:11px 18px;background:var(--chrome);border-bottom:1px solid var(--line);}
  .nt__cur{display:inline-flex;align-items:center;gap:9px;height:34px;padding:0 13px;border:1px solid var(--line-2);border-radius:8px;background:var(--paper);min-width:96px;justify-content:center;}
  .nt__cur .g{font-size:20px;line-height:1;color:var(--ink);}
  .nt__cur .cp{font-family:var(--mono);font-size:10px;letter-spacing:.06em;color:var(--ink-faint);}

  .nt{flex:1 1 auto;min-height:0;display:grid;grid-template-columns:270px minmax(0,1fr) 340px;}
  .nt__col{min-width:0;min-height:0;display:flex;flex-direction:column;border-right:1px solid var(--line);background:var(--paper);}
  .nt__col--map,.nt__col--notes{background:var(--chrome);}
  .nt__col--notes{border-right:0;}
  .nt__colhd{flex:0 0 auto;padding:11px 14px;border-bottom:1px solid var(--line);font-family:var(--mono);font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-faint);display:flex;align-items:center;justify-content:space-between;gap:8px;}
  .nt__colhd b{color:var(--ink-soft);font-weight:500;}

  .nt__mapscroll{flex:1 1 auto;min-height:0;overflow:auto;padding:10px;}
  .nt__grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(50px,1fr));gap:6px;}
  .nt__cell{aspect-ratio:1/1;border:1px solid var(--line);border-radius:8px;background:var(--paper);display:flex;flex-direction:column;align-items:center;justify-content:center;cursor:pointer;position:relative;transition:border-color .1s,background .1s,box-shadow .1s;overflow:hidden;}
  .nt__cell .g{font-size:24px;line-height:1;color:var(--ink);}
  .nt__cell .cp{font-family:var(--mono);font-size:7.5px;color:var(--ink-faint);margin-top:3px;letter-spacing:.02em;}
  .nt__cell:hover{border-color:var(--ink-soft);}
  .nt__cell.is-marked{background:var(--accent-soft);border-color:#bfc0d8;}
  .nt__cell.is-marked::after{content:"";position:absolute;top:4px;right:4px;width:7px;height:7px;border-radius:50%;background:var(--accent);}
  .nt__cell.is-sel{border-color:var(--accent);box-shadow:inset 0 0 0 2px var(--accent);}

  .nt__col--bento{background:var(--workspace);}
  .nt__padbar{flex:0 0 auto;display:flex;align-items:center;gap:10px 14px;padding:11px 14px;border-bottom:1px solid var(--line);flex-wrap:wrap;}
  .nt__padbar-label{font-family:var(--mono);font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-faint);}
  .nt__tools button{padding:0 11px;display:inline-flex;align-items:center;justify-content:center;}
  .nt__tools button svg{width:17px;height:17px;}

  .nt__colordd{position:relative;}
  .nt__colorbtn{display:inline-flex;align-items:center;gap:8px;height:34px;padding:0 10px 0 8px;border:1px solid var(--line-2);border-radius:8px;background:var(--paper);cursor:pointer;font-family:var(--mono);font-size:12px;color:var(--ink);transition:border-color .12s;}
  .nt__colorbtn:hover{border-color:var(--ink-soft);}
  .nt__colorbtn:focus-visible{outline:none;box-shadow:0 0 0 3px var(--accent-soft),0 0 0 1px var(--accent);border-color:var(--accent);}
  .nt__colorsw{width:18px;height:18px;border-radius:5px;box-shadow:inset 0 0 0 1px rgba(0,0,0,.15);}
  .nt__colorbtn .chev{width:14px;height:14px;transition:transform .16s;}
  .nt__colordd.is-open .nt__colorbtn .chev{transform:rotate(180deg);}
  .nt__colorpanel{position:absolute;top:calc(100% + 8px);left:0;z-index:30;background:var(--paper);border:1px solid var(--line-2);border-radius:10px;box-shadow:0 1px 2px rgba(0,0,0,.04),0 16px 36px -18px rgba(0,0,0,.3);padding:12px;display:none;flex-direction:column;gap:12px;width:196px;}
  .nt__colordd.is-open .nt__colorpanel{display:flex;}
  .nt__swatches{display:grid;grid-template-columns:repeat(5,1fr);gap:9px;}
  .nt__swatch{width:20px;height:20px;border-radius:50%;cursor:pointer;border:2px solid var(--paper);box-shadow:0 0 0 1px var(--line-2);transition:transform .1s,box-shadow .1s;}
  .nt__swatch:hover{transform:scale(1.12);}
  .nt__swatch.is-active{box-shadow:0 0 0 2px var(--paper),0 0 0 4px currentColor;}
  .nt__custom{position:relative;display:inline-flex;align-items:center;gap:9px;cursor:pointer;}
  .nt__custom input[type=color]{position:absolute;left:0;top:0;width:24px;height:24px;opacity:0;cursor:pointer;}
  .nt__customdot{width:24px;height:24px;border-radius:6px;border:1px dashed var(--ink-faint);background:conic-gradient(from 0deg,#e5484d,#f5a623,#2f9e44,#1c7ed6,#ae3ec9,#e5484d);}
  .nt__customlab{font-family:var(--mono);font-size:11px;color:var(--ink-soft);}
  .nt__padhint{margin-left:auto;font-family:var(--mono);font-size:9.5px;letter-spacing:.05em;color:var(--ink-faint);text-transform:uppercase;}

  .nt__pad{flex:1 1 auto;min-height:0;position:relative;margin:14px;border:1px solid var(--line);border-radius:12px;background:var(--paper);overflow:hidden;box-shadow:inset 0 0 0 1px rgba(0,0,0,.01);}
  .nt__glyphc{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;}
  .nt__overlay{position:absolute;inset:0;cursor:crosshair;touch-action:none;}
  .nt__circle{position:absolute;border-radius:50%;border:2px solid var(--c);background:var(--cbg);box-sizing:border-box;cursor:move;touch-action:none;}
  .nt__circle.is-sel{outline:2px solid var(--c);outline-offset:2px;}
  .nt__handle{position:absolute;right:-7px;bottom:-7px;width:13px;height:13px;border-radius:50%;background:var(--paper);border:2px solid var(--c);cursor:nwse-resize;}
  /* line marks */
  .nt__hline{position:absolute;left:0;width:100%;height:16px;transform:translateY(-50%);cursor:row-resize;touch-action:none;}
  .nt__vline{position:absolute;top:0;height:100%;width:16px;transform:translateX(-50%);cursor:col-resize;touch-action:none;}
  .nt__hline .bar{position:absolute;left:0;right:0;top:50%;transform:translateY(-50%);height:3px;background:var(--c);border-radius:2px;}
  .nt__vline .bar{position:absolute;top:0;bottom:0;left:50%;transform:translateX(-50%);width:3px;background:var(--c);border-radius:2px;}
  .nt__hline.is-sel .bar{height:5px;box-shadow:0 0 0 1px var(--paper);}
  .nt__vline.is-sel .bar{width:5px;box-shadow:0 0 0 1px var(--paper);}
  /* arrow mark */
  .nt__arrow{position:absolute;}
  .nt__arrow .nt__arm{position:absolute;left:0;top:0;height:16px;margin-top:-8px;transform-origin:0 50%;cursor:move;touch-action:none;}
  .nt__arrow .ashaft{position:absolute;left:0;top:50%;transform:translateY(-50%);width:100%;height:3px;background:var(--c);border-radius:2px;}
  .nt__arrow .ahead{position:absolute;left:100%;top:50%;transform:translateY(-50%);width:0;height:0;border-left:13px solid var(--c);border-top:7px solid transparent;border-bottom:7px solid transparent;margin-left:-1px;}
  .nt__arrow .nt__ahandle{position:absolute;left:100%;top:50%;transform:translate(2px,-50%);width:14px;height:14px;border-radius:50%;background:var(--paper);border:2px solid var(--c);cursor:crosshair;touch-action:none;opacity:0;pointer-events:none;transition:opacity .1s;}
  .nt__arrow.is-sel .nt__ahandle{opacity:1;pointer-events:auto;}
  .nt__arrow.is-sel .ashaft{height:5px;box-shadow:0 0 0 1px var(--paper);}
  .nt__arrow .nt__lbadge{left:-9px;top:-9px;}
  /* shared badge (circle + line) */
  .nt__badge,.nt__lbadge{position:absolute;min-width:19px;height:19px;padding:0 4px;border-radius:10px;background:var(--c);color:#fff;font-family:var(--mono);font-size:11px;font-weight:600;display:flex;align-items:center;justify-content:center;box-shadow:0 1px 3px rgba(0,0,0,.35);pointer-events:none;}
  .nt__badge{top:-10px;right:-10px;}
  .nt__hline .nt__lbadge{left:8px;top:50%;transform:translateY(-50%);}
  .nt__vline .nt__lbadge{top:8px;left:50%;transform:translateX(-50%);}

  .nt__sizes{flex:0 0 auto;display:flex;gap:10px;padding:0 14px 14px;}
  .nt__size{flex:1 1 0;min-width:0;border:1px solid var(--line);border-radius:10px;background:var(--paper);height:120px;overflow:hidden;position:relative;}
  .nt__size canvas{position:absolute;inset:0;width:100%;height:100%;}
  .nt__size .lab{position:absolute;bottom:6px;right:8px;z-index:1;font-family:var(--mono);font-size:9px;letter-spacing:.06em;color:var(--ink-faint);}

  .nt__notes{flex:1 1 auto;min-height:0;overflow:auto;padding:10px;display:flex;flex-direction:column;gap:8px;}
  .nt__note{display:flex;gap:10px;align-items:flex-start;background:var(--paper);border:1px solid var(--line);border-radius:10px;padding:9px 10px;cursor:pointer;transition:border-color .1s,box-shadow .1s;}
  .nt__note:hover{border-color:var(--ink-soft);}
  .nt__note.is-sel{border-color:var(--accent);box-shadow:inset 0 0 0 1px var(--accent);}
  .nt__num{flex:0 0 auto;width:22px;height:22px;border-radius:50%;background:var(--c);color:#fff;font-family:var(--mono);font-size:11px;font-weight:600;display:flex;align-items:center;justify-content:center;margin-top:1px;}
  .nt__note textarea{flex:1 1 auto;min-width:0;border:0;outline:none;resize:none;background:none;font-family:var(--ui);font-size:13px;color:var(--ink);line-height:1.45;padding:1px 0;overflow:hidden;}
  .nt__note textarea::placeholder{color:var(--ink-faint);}
  .nt__del{flex:0 0 auto;border:0;background:none;color:var(--ink-faint);cursor:pointer;width:24px;height:24px;border-radius:6px;display:flex;align-items:center;justify-content:center;}
  .nt__del:hover{background:#f2f2f4;color:var(--ink);}
  .nt__del svg{width:15px;height:15px;}
  .nt__ticon{flex:0 0 auto;width:15px;height:15px;color:var(--ink-faint);margin-top:4px;}
  .nt__ticon svg{width:100%;height:100%;stroke-width:1.7;}

  .nt__mini{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:30px 18px;color:var(--ink-soft);}
  .nt__mini p{margin:0;font-size:12.5px;line-height:1.5;max-width:220px;}
  .nt__mini .lil{margin-top:8px;font-family:var(--mono);font-size:9.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-faint);}

  .nt__blank{display:none;flex:1;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:48px 24px;color:var(--ink-soft);}
  #panel-notation.no-font .nt{display:none;}
  #panel-notation.no-font .nt__blank{display:flex;}
  .nt__blank .mk{width:46px;height:46px;color:var(--line-2);margin-bottom:14px;}
  .nt__blank .mk svg{width:100%;height:100%;stroke-width:1.4;}
  .nt__blank h3{font-family:var(--wordmark);font-weight:700;font-size:20px;margin:0 0 6px;color:var(--ink);}
  .nt__blank p{margin:0;max-width:340px;font-size:13.5px;line-height:1.5;}
  .nt__blank .lil{margin-top:8px;font-family:var(--mono);font-size:10px;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-faint);}

  @media (max-width:900px){
    .nt{grid-template-columns:1fr;grid-auto-rows:minmax(240px,auto);overflow:auto;}
    .nt__col{border-right:0;border-bottom:1px solid var(--line);}
    .nt__pad{min-height:220px;}
  }

  /* ================= STRINGS ================= */
  .st__bar{flex:0 0 auto;display:flex;align-items:center;gap:16px;padding:11px 18px;background:var(--chrome);border-bottom:1px solid var(--line);flex-wrap:wrap;}
  .st__barhint{margin-left:auto;font-family:var(--mono);font-size:9.5px;letter-spacing:.05em;text-transform:uppercase;color:var(--ink-faint);}
  .st{flex:1 1 auto;min-height:0;overflow:auto;padding:16px;display:grid;grid-template-columns:repeat(auto-fill,minmax(380px,1fr));gap:14px;align-content:start;background:var(--workspace);}
  .st__box{border:1px solid var(--line);border-radius:12px;background:var(--paper);display:flex;flex-direction:column;overflow:hidden;min-height:230px;}
  .st__boxhd{flex:0 0 auto;display:flex;align-items:center;justify-content:space-between;gap:8px;row-gap:8px;flex-wrap:wrap;padding:9px 12px;border-bottom:1px solid var(--line);}
  .st__style{display:flex;flex-direction:column;gap:1px;min-width:0;}
  .st__style .s1{font-size:13px;font-weight:500;color:var(--ink);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
  .st__style .s2{font-family:var(--mono);font-size:9.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-faint);white-space:nowrap;}
  .st__typebar{flex:0 0 auto;display:flex;align-items:center;justify-content:space-between;gap:8px;row-gap:8px;flex-wrap:wrap;padding:8px 12px;border-bottom:1px solid var(--line);background:var(--chrome);}
  .st__types{height:30px;}
  .st__types button{padding:0 9px;display:inline-flex;align-items:center;justify-content:center;}
  .st__types button svg{width:15px;height:15px;stroke-width:1.7;}
  .st__case{height:30px;}
  .st__case button{padding:0 8px;font-size:12px;}
  .st__opt{display:inline-flex;align-items:center;gap:4px;}
  .st__opt .lbl{font-family:var(--mono);font-size:10px;letter-spacing:.04em;color:var(--ink-soft);min-width:84px;text-align:center;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
  .st__nav{width:26px;height:26px;display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--line-2);border-radius:7px;background:var(--paper);color:var(--ink);cursor:pointer;transition:border-color .12s,background .12s;}
  .st__nav:hover{border-color:var(--ink-soft);}
  .st__nav:disabled{opacity:.35;cursor:default;}
  .st__nav svg{width:13px;height:13px;stroke-width:2;}
  .st__gsep{width:1px;align-self:stretch;min-height:26px;background:var(--line-2);}
  .st__lsize{height:30px;}
  .st__lsize input{width:34px;font-size:12px;}
  .st__lsize button{width:24px;}
  .st__body{flex:1 1 auto;min-height:0;overflow:auto;padding:16px 18px;color:var(--ink);line-height:1.35;word-break:break-word;}
  .st__body.is-para{line-height:1.5;}
  .st__body.case-lower{text-transform:lowercase;}
  .st__body.case-upper{text-transform:uppercase;}
  .st__body.case-sentence{text-transform:none;}
  .st__body textarea{width:100%;min-height:130px;height:100%;border:0;outline:none;resize:none;background:none;color:inherit;font:inherit;line-height:inherit;letter-spacing:inherit;}
  .st__body textarea::placeholder{color:var(--ink-faint);}

  .st__blank{display:none;flex:1;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:48px 24px;color:var(--ink-soft);}
  #panel-strings.no-font .st{display:none;}
  #panel-strings.no-font .st__blank{display:flex;}
  .st__blank .mk{width:46px;height:46px;color:var(--line-2);margin-bottom:14px;}
  .st__blank .mk svg{width:100%;height:100%;stroke-width:1.4;}
  .st__blank h3{font-family:var(--wordmark);font-weight:700;font-size:20px;margin:0 0 6px;color:var(--ink);}
  .st__blank p{margin:0;max-width:340px;font-size:13.5px;line-height:1.5;}
  .st__blank .lil{margin-top:8px;font-family:var(--mono);font-size:10px;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-faint);}

  /* ================= ISSUES + SELECTION ================= */
  .tab__count{display:none;min-width:16px;height:16px;padding:0 4px;border-radius:8px;background:var(--accent);color:#fff;font-size:9.5px;font-weight:600;font-family:var(--mono);align-items:center;justify-content:center;}
  .tab__count.on{display:inline-flex;}
  .tt-seltoggle[aria-pressed="true"]{background:var(--accent);border-color:var(--accent);color:var(--accent-ink);}
  body.tt-selecting [data-tt-style]{cursor:text;}
  body.tt-selecting ::selection{background:rgba(37,38,79,.22);}
  body.tt-selecting [data-tt-style]:hover{box-shadow:inset 0 0 0 1px var(--accent-soft);}

  .iss__bar{flex:0 0 auto;display:flex;align-items:center;gap:12px;padding:11px 18px;background:var(--chrome);border-bottom:1px solid var(--line);}
  .iss__total{font-family:var(--mono);color:var(--ink);font-weight:600;}
  .iss__list{flex:1 1 auto;min-height:0;overflow:auto;padding:14px 18px;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;align-content:start;background:var(--workspace);}
  .iss__row{display:flex;align-items:center;gap:16px;background:var(--paper);border:1px solid var(--line);border-radius:10px;padding:10px 14px;}
  .iss__pair{flex:0 0 auto;min-width:64px;font-size:34px;line-height:1.1;color:var(--ink);white-space:pre;overflow:hidden;}
  .iss__meta{flex:1 1 auto;min-width:0;display:flex;flex-direction:column;gap:3px;}
  .iss__raw{font-family:var(--mono);font-size:12px;color:var(--ink);white-space:pre;overflow:hidden;text-overflow:ellipsis;}
  .iss__sub{font-family:var(--mono);font-size:10px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-faint);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
  .iss__del{flex:0 0 auto;border:0;background:none;color:var(--ink-faint);cursor:pointer;width:26px;height:26px;border-radius:7px;display:flex;align-items:center;justify-content:center;}
  .iss__del:hover{background:#f2f2f4;color:var(--ink);}
  .iss__del svg{width:15px;height:15px;}
  .iss__blank{display:none;flex:1;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:48px 24px;color:var(--ink-soft);}
  #panel-issues.empty .iss__list{display:none;}
  #panel-issues.empty .iss__blank{display:flex;}
  .iss__blank .mk{width:46px;height:46px;color:var(--line-2);margin-bottom:14px;}
  .iss__blank .mk svg{width:100%;height:100%;stroke-width:1.4;}
  .iss__blank h3{font-family:var(--wordmark);font-weight:700;font-size:20px;margin:0 0 6px;color:var(--ink);}
  .iss__blank p{margin:0;max-width:380px;font-size:13.5px;line-height:1.5;}
  .iss__blank p b{color:var(--ink);}

  .tt-toast{position:fixed;left:50%;bottom:28px;transform:translateX(-50%) translateY(16px);background:var(--ink);color:#fff;padding:10px 16px;border-radius:10px;font-size:13px;box-shadow:0 12px 34px -12px rgba(0,0,0,.55);opacity:0;pointer-events:none;transition:opacity .2s,transform .2s;z-index:90;display:flex;align-items:center;gap:9px;max-width:min(88vw,420px);}
  .tt-toast.show{opacity:1;transform:translateX(-50%) translateY(0);}
  .tt-toast b{font-weight:600;}
  .tt-toast .sub{opacity:.65;font-family:var(--mono);font-size:11px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}

  /* ---------- Drop overlay ---------- */
  .drop{position:fixed;inset:0;z-index:80;display:none;align-items:center;justify-content:center;background:rgba(232,232,234,.82);backdrop-filter:blur(2px);padding:40px;}
  .drop.is-shown{display:flex;}
  .drop__inner{border:2px dashed var(--accent);border-radius:16px;background:var(--paper);width:min(560px,100%);padding:46px 40px;text-align:center;box-shadow:0 30px 70px -30px rgba(0,0,0,.4);}
  .drop__inner .ico{width:44px;height:44px;color:var(--accent);margin:0 auto 16px;}
  .drop__inner h3{margin:0 0 6px;font-family:var(--wordmark);font-weight:700;font-size:22px;}
  .drop__inner p{margin:0;color:var(--ink-soft);font-size:13.5px;}
  .drop__inner .hint{margin-top:10px;font-family:var(--mono);font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-faint);}

  .sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0;}

  @media (max-width:640px){
    .brand__meta,.readout{display:none;}
    .header{gap:10px;padding:0 12px;}
    .btn--upload .btn__label{display:none;}
    .btn--upload{padding:0 12px;}
    #shareBtn .btn__label{display:none;}
    #shareBtn{padding:0 12px;}
    .tab__label{display:none;}
    .tab{padding:0 12px;gap:6px;}
    .panel{position:fixed;top:calc(var(--h-header) + 6px);left:8px;right:8px;width:auto;max-width:none;}
    .wf__bar{padding:10px 12px;gap:8px 12px;}
    .slider input[type=range]{width:104px;}
  }
  @media (prefers-reduced-motion:reduce){*{transition:none !important;}.spin{animation:none;}}