:root{
    --bg:#0d1117; --panel:#161b22; --panel2:#1c2330; --border:#2a3140;
    --text:#e6edf3; --muted:#8b949e; --accent:#2f81f7; --accent2:#3fb950;
    --danger:#f85149; --warn:#d29922;
    --font: -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
    --mono: ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,monospace;
  }
  *{box-sizing:border-box}
  html,body{margin:0;height:100%;background:var(--bg);color:var(--text);font-family:var(--font);font-size:13px}
  body{display:flex;flex-direction:column;overflow:hidden}
  header{display:flex;align-items:center;gap:16px;padding:10px 16px;background:var(--panel);border-bottom:1px solid var(--border);flex-shrink:0}
  header h1{font-size:15px;margin:0;font-weight:600;letter-spacing:.2px}
  header .sub{color:var(--muted);font-size:12px}
  .spacer{flex:1}
  .btn{background:var(--panel2);border:1px solid var(--border);color:var(--text);border-radius:6px;padding:6px 12px;font-size:12px;cursor:pointer;font-family:var(--font);display:inline-flex;align-items:center;gap:5px}
  .btn:hover{border-color:var(--accent)}
  .btn.primary{background:var(--accent);border-color:var(--accent);color:#fff}
  .layout{flex:1;display:flex;min-height:0}
  /* view-minimize chips in the header */
  .view-toggles{display:flex;gap:6px;margin-right:10px}
  .vt-chip{background:var(--panel2);border:1px solid var(--border);color:var(--muted);border-radius:6px;padding:5px 10px;font-size:12px;cursor:pointer;font-family:var(--font);white-space:nowrap}
  .vt-chip:hover{color:var(--text);border-color:var(--accent)}
  .vt-chip.active{background:var(--accent);border-color:var(--accent);color:#fff}
  /* collapsed states: hide the panel and let the chart reflow to fill the space */
  .layout.sidebar-collapsed > aside{display:none}
  main.controls-collapsed > .controls,
  main.controls-collapsed > .tool-panel{display:none !important}
  /* sidebar */
  aside{width:330px;flex-shrink:0;background:var(--panel);border-right:1px solid var(--border);display:flex;flex-direction:column;min-height:0}
  .side-head{padding:10px 12px;border-bottom:1px solid var(--border)}
  .search{width:100%;background:var(--panel2);border:1px solid var(--border);border-radius:6px;color:var(--text);padding:7px 9px;font-size:12px;font-family:var(--font)}
  .search::placeholder{color:var(--muted)}
  .side-actions{display:flex;flex-wrap:wrap;gap:6px;margin-top:8px}
  .side-actions button{flex:1 1 45%;background:var(--panel2);border:1px solid var(--border);color:var(--muted);border-radius:6px;padding:5px;font-size:11px;cursor:pointer;font-family:var(--font);white-space:nowrap}
  .side-actions button:hover{color:var(--text);border-color:var(--accent)}
  .series-list{flex:1;overflow-y:auto;padding:4px 6px}
  /* module block */
  .mod-block{margin-bottom:6px;border:1px solid var(--border);border-radius:8px;overflow:hidden}
  .mod-head{display:flex;align-items:center;gap:8px;padding:8px 10px;background:var(--panel2);cursor:pointer;user-select:none}
  .mod-head .swatch{width:10px;height:10px;border-radius:3px;flex-shrink:0}
  .mod-head .mod-name{flex:1;font-weight:600;font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .mod-head .mod-meta{color:var(--muted);font-size:10px;flex-shrink:0}
  .mod-head .fmt-badge{font-size:9px;font-weight:600;text-transform:uppercase;letter-spacing:.4px;color:var(--accent);background:rgba(47,129,247,.12);border:1px solid rgba(47,129,247,.35);border-radius:4px;padding:1px 5px;flex-shrink:0}
  .mod-head .fmt-badge:empty{display:none}
  .mod-head .caret{color:var(--muted);font-size:10px;transition:transform .15s;width:12px;text-align:center}
  .mod-block.collapsed .caret{transform:rotate(-90deg)}
  .mod-block.collapsed .mod-channels{display:none}
  .mod-head .mod-remove{display:inline-flex;align-items:center;gap:4px;background:transparent;border:1px solid var(--border);color:var(--muted);border-radius:6px;padding:3px 7px;font-size:11px;line-height:1;cursor:pointer;font-family:var(--font);flex-shrink:0}
  .mod-head .mod-remove:hover{color:#fff;background:var(--danger);border-color:var(--danger)}
  .mod-head .mod-remove svg{display:block}
  .mod-channels{padding:3px 4px}
  .group-title{font-size:9px;text-transform:uppercase;letter-spacing:.6px;color:var(--muted);padding:7px 8px 3px;font-weight:600}
  .grp-head{display:flex;align-items:center;gap:6px;cursor:pointer;user-select:none}
  .grp-head .caret{font-size:10px;transition:transform .15s;width:10px;text-align:center}
  .grp-head.collapsed .caret{transform:rotate(-90deg)}
  .grp-head .grp-name{flex:1}
  .grp-head .grp-count{color:var(--muted);font-size:9px;letter-spacing:0}
  .grp-head:hover .grp-name{color:var(--text)}
  .grp-body.collapsed{display:none}
  .series-item{display:flex;align-items:center;gap:8px;padding:5px 8px;border-radius:6px;cursor:pointer;user-select:none}
  .series-item:hover{background:var(--panel2)}
  .series-item .sw{width:11px;height:11px;border-radius:3px;flex-shrink:0;border:1px solid rgba(255,255,255,.15)}
  .series-item .nm{flex:1;font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .series-item.off .nm{color:var(--muted)}
  .series-item.off .sw{background:transparent !important;border-color:var(--border)}
  .series-item .val{font-family:var(--mono);font-size:11px;color:var(--muted);flex-shrink:0}
  /* main */
  main{flex:1;display:flex;flex-direction:column;min-width:0;min-height:0}
  .controls{display:flex;align-items:center;gap:14px;padding:10px 16px;border-bottom:1px solid var(--border);background:var(--panel);flex-wrap:wrap}
  .ctrl{display:flex;align-items:center;gap:6px}
  .ctrl label{color:var(--muted);font-size:11px}
  .ctrl input[type=datetime-local]{background:var(--panel2);border:1px solid var(--border);color:var(--text);border-radius:6px;padding:5px 7px;font-size:11px;font-family:var(--font);color-scheme:dark}
  .quick{display:flex;gap:4px}
  .quick button{background:var(--panel2);border:1px solid var(--border);color:var(--muted);border-radius:6px;padding:5px 9px;font-size:11px;cursor:pointer;font-family:var(--font)}
  .quick button:hover{color:var(--text);border-color:var(--accent)}
  .hint{color:var(--muted);font-size:11px;margin-left:auto}
  .chart-wrap{flex:1;position:relative;min-height:0;padding:8px 12px 12px}
  #chart{width:100%;height:100%}
  /* uPlot dark tweaks */
  .uplot{font-family:var(--font)}
  .u-legend{display:none}
  /* --ot-readout-fs is set from JS (persisted); the rows size in em so they scale with it */
  .u-tooltip{position:absolute;z-index:30;background:var(--panel2);border:1px solid var(--border);border-radius:8px;padding:8px 10px;font-size:var(--ot-readout-fs,11px);pointer-events:none;box-shadow:0 6px 22px rgba(0,0,0,.5);max-width:min(520px,80vw);display:none}
  .u-tooltip .tt-time{color:var(--muted);font-family:var(--mono);margin-bottom:6px;border-bottom:1px solid var(--border);padding-bottom:4px}
  .u-tooltip .tt-row{display:flex;align-items:center;gap:6px;padding:1px 0}
  .u-tooltip .tt-row .d{width:.82em;height:.82em;border-radius:2px;flex-shrink:0}
  .u-tooltip .tt-row .n{flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .u-tooltip .tt-row .mod{color:inherit;opacity:.72;font-size:.9em}
  .u-tooltip .tt-row .v{font-family:var(--mono);font-weight:600}
  /* empty / drop */
  .empty-state{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:18px;text-align:center;padding:0 40px}
  .empty-state .big{font-size:46px;color:var(--accent);line-height:1}
  .empty-state .t{font-size:18px;font-weight:600}
  .empty-state .s{color:var(--muted);font-size:13px;max-width:440px;line-height:1.5}
  .empty-msg{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;color:var(--muted);font-size:13px;text-align:center;padding:0 40px}
  #dropOverlay{position:fixed;inset:0;z-index:100;background:rgba(13,17,23,.82);display:none;align-items:center;justify-content:center}
  #dropOverlay.show{display:flex}
  .drop-card{border:2px dashed var(--accent);border-radius:16px;padding:48px 64px;text-align:center;background:var(--panel)}
  .drop-icon{font-size:46px;color:var(--accent);line-height:1}
  .drop-title{font-size:18px;font-weight:600;margin-top:14px}
  .drop-sub{color:var(--muted);font-size:13px;margin-top:6px}
  #toast{position:fixed;bottom:20px;left:50%;transform:translateX(-50%);z-index:120;background:var(--panel2);border:1px solid var(--border);border-radius:8px;padding:10px 16px;font-size:13px;display:none;box-shadow:0 8px 30px rgba(0,0,0,.5);max-width:560px}
  #toast.err{border-color:var(--danger);color:#ffb3ad}
  #toast.ok{border-color:var(--accent2)}
  /* confirm modal */
  .modal-overlay{position:fixed;inset:0;z-index:200;background:rgba(13,17,23,.7);display:none;align-items:center;justify-content:center}
  .modal-overlay.show{display:flex}
  .modal-card{background:var(--panel);border:1px solid var(--border);border-radius:12px;padding:22px 24px;max-width:420px;width:90%;box-shadow:0 18px 50px rgba(0,0,0,.6)}
  .modal-title{font-size:16px;font-weight:600;margin-bottom:10px}
  .modal-body{color:var(--muted);font-size:13px;line-height:1.5;margin-bottom:20px}
  .modal-actions{display:flex;justify-content:flex-end;gap:10px}
  .btn.danger{background:var(--danger);border-color:var(--danger);color:#fff}
  .btn.danger:hover{filter:brightness(1.1)}
  .btn:disabled{opacity:.45;cursor:not-allowed}
  .btn:disabled:hover{border-color:var(--border)}
  /* session export/import dialogs */
  .modal-card.sess-card{max-width:520px;max-height:86vh;display:flex;flex-direction:column}
  .modal-card.sess-card.wide{max-width:600px}
  .sess-field{margin-bottom:14px}
  .sess-field > label{display:block;color:var(--muted);font-size:11px;text-transform:uppercase;letter-spacing:.4px;margin-bottom:5px}
  .sess-field textarea.search{resize:vertical;font-family:var(--font);line-height:1.45}
  .sess-radios{display:flex;flex-direction:column;gap:8px}
  .sess-radios > label{display:flex;gap:8px;align-items:flex-start;background:var(--panel2);border:1px solid var(--border);border-radius:8px;padding:8px 10px;cursor:pointer}
  .sess-radios > label:hover{border-color:var(--accent)}
  .sess-radios input{margin-top:2px;flex-shrink:0;accent-color:var(--accent)}
  .sess-radios b{display:block;font-size:12px;font-weight:600}
  .sess-radios i{display:block;color:var(--muted);font-size:11px;font-style:normal;line-height:1.45;margin-top:2px}
  .sess-size{color:var(--muted);font-size:11px;margin-top:8px;font-family:var(--mono)}
  .sess-preview{overflow-y:auto;margin-bottom:18px;font-size:12px}
  .sess-row{display:flex;gap:10px;padding:4px 0;border-bottom:1px solid var(--border);line-height:1.5}
  .sess-row > span:first-child{color:var(--muted);flex:0 0 108px;font-size:11px;text-transform:uppercase;letter-spacing:.3px;padding-top:1px}
  .sess-row > b,.sess-row > ul{flex:1;min-width:0;font-weight:500;word-break:break-word}
  .sess-row.block{flex-direction:column;gap:4px}
  .sess-row.block > span:first-child{flex:none}
  .sess-row i{color:var(--muted);font-style:normal;font-size:11px}
  .sess-mods{list-style:none;margin:0;padding:0}
  .sess-mods li{padding:4px 0 4px 8px;border-left:2px solid var(--border)}
  .sess-mods li + li{margin-top:3px}
  .sess-mods b{display:block}
  .sess-mods span{color:var(--muted);font-size:11px}
  .sess-mods i{display:block}
  .sess-note{background:var(--panel2);border-left:2px solid var(--accent);border-radius:0 6px 6px 0;padding:8px 10px;margin:8px 0;color:var(--text);line-height:1.5;white-space:pre-wrap}
  .sess-badge{display:inline-block;border-radius:999px;padding:1px 9px;font-size:11px;font-weight:600}
  .sess-badge.full{background:rgba(63,185,80,.16);color:var(--accent2);border:1px solid var(--accent2)}
  .sess-badge.overlay{background:rgba(47,129,247,.16);color:var(--accent);border:1px solid var(--accent)}
  .sess-warn{background:rgba(210,153,34,.12);border:1px solid var(--warn);color:var(--text);border-radius:8px;padding:8px 10px;margin-top:10px;line-height:1.5}
  .sess-ok{background:rgba(63,185,80,.1);border:1px solid var(--accent2);border-radius:8px;padding:8px 10px;margin-top:10px;line-height:1.5}
  .sess-missing{list-style:none;margin:6px 0 0;padding:0}
  .sess-missing li{padding:2px 0 2px 8px;border-left:2px solid var(--warn)}
  /* locked (unlicensed) toolbar chips: visible but not usable */
  .vt-chip.locked{opacity:.5;cursor:not-allowed;border-style:dashed}
  .vt-chip.locked:hover{color:var(--muted);border-color:var(--border)}
  /* ---- synced windows: status pill + settings dropdown ---- */
  .sync-pill{display:inline-flex;align-items:center;gap:6px}
  .sync-pill .sync-dot{width:7px;height:7px;border-radius:50%;background:var(--muted);flex-shrink:0}
  .sync-pill.on{color:var(--text);border-color:var(--accent2)}
  .sync-pill.on .sync-dot{background:var(--accent2);box-shadow:0 0 5px rgba(63,185,80,.8)}
  .sync-pill.warn{border-color:var(--warn)}
  .sync-pill.warn .sync-dot{background:var(--warn);box-shadow:0 0 5px rgba(210,153,34,.8)}
  .sync-pill .sync-w{font-family:var(--mono);font-size:10px;color:var(--muted);border:1px solid var(--border);border-radius:4px;padding:0 4px}
  .sync-pill .sync-gear{opacity:.7;font-size:11px}
  .sync-menu{display:none;position:fixed;z-index:60;min-width:270px;background:var(--panel);border:1px solid var(--border);border-radius:10px;padding:10px;box-shadow:0 10px 30px rgba(0,0,0,.5)}
  .sync-menu.show{display:block}
  .sync-mtitle{font-size:11px;text-transform:uppercase;letter-spacing:.6px;color:var(--muted);margin-bottom:8px}
  .sync-row{display:flex;align-items:center;gap:8px;padding:4px 2px;font-size:12px;cursor:pointer}
  .sync-row input{accent-color:var(--accent);margin:0}
  .sync-div{height:1px;background:var(--border);margin:8px 0}
  .sync-note{font-size:11px;color:var(--muted);line-height:1.5;margin-bottom:8px}
  .sync-note.warn{color:var(--warn)}
  .sync-menu .sync-save{width:100%;justify-content:center}
  .sync-menu .sync-reset{display:block;text-align:center;font-size:11px;color:var(--muted);margin-top:6px;text-decoration:none}
  .sync-menu .sync-reset:hover{color:var(--accent)}
  .sync-menu .sync-disc{width:100%;justify-content:center;margin-top:2px}
  /* segmented control (X-axis mode) */
  .seg{display:inline-flex;background:var(--panel2);border:1px solid var(--border);border-radius:8px;overflow:hidden}
  .seg button{background:transparent;border:0;color:var(--muted);padding:6px 12px;cursor:pointer;font-size:12px;font-weight:500;font-family:var(--font)}
  .seg button + button{border-left:1px solid var(--border)}
  .seg button.active{background:var(--accent);color:#fff}
  .controls .divider{width:1px;align-self:stretch;background:var(--border);margin:0 2px}
  /* offset panel */
  #offsetPanel{display:none;border-bottom:1px solid var(--border);background:var(--panel);padding:10px 16px}
  #offsetPanel.show{display:block}
  .offset-head{display:flex;align-items:center;gap:12px;font-size:12px;color:var(--muted);margin-bottom:8px}
  .offset-head span{flex:1}
  #offsetList{display:flex;flex-direction:column;gap:7px}
  .offset-row{display:flex;align-items:center;gap:10px}
  .offset-row .swatch{width:10px;height:10px;border-radius:3px;flex-shrink:0}
  .offset-row .onm{font-size:12px;font-weight:600;min-width:150px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  /* touch-action:none so a finger drag on a tablet moves the thumb instead of scrolling the page */
  .offset-row input[type=range]{flex:1;accent-color:var(--accent);min-width:120px;touch-action:none;cursor:grab}
  .offset-row input[type=range].dragging{cursor:grabbing}
  .offset-row .nudge{background:var(--panel2);border:1px solid var(--border);color:var(--text);border-radius:6px;width:26px;height:26px;cursor:pointer;font-size:14px;line-height:1;font-family:var(--font)}
  .offset-row .nudge:hover{border-color:var(--accent)}
  .offset-row .oval{font-family:var(--mono);font-size:12px;min-width:96px;text-align:right;color:var(--text)}
  .offset-row input[type=number]{width:78px;background:var(--panel2);border:1px solid var(--border);color:var(--text);border-radius:6px;padding:4px 6px;font-size:12px;font-family:var(--mono)}
  ::-webkit-scrollbar{width:9px;height:9px}
  ::-webkit-scrollbar-thumb{background:var(--border);border-radius:5px}
  ::-webkit-scrollbar-track{background:transparent}
  /* tools row */
  .tools-row{gap:8px;padding-top:8px;padding-bottom:8px}
  .tools-label{color:var(--muted);font-size:11px;margin-right:2px}
  .tool-btn.active{background:var(--accent);border-color:var(--accent);color:#fff}
  .tool-hint{color:var(--muted);font-size:11px;margin-left:8px}
  .tool-sep{width:1px;height:20px;background:var(--border);margin:0 4px}
  .tools-row select#cursorMode{background:var(--panel2);border:1px solid var(--border);color:var(--text);border-radius:6px;padding:5px 7px;font-size:12px;font-family:var(--font)}
  /* cursor readout text-size stepper */
  .readout-fs{display:inline-flex;align-items:center;gap:4px}
  .readout-fs .fs-btn{padding:3px 7px;font-size:11px;line-height:1.3;min-width:30px}
  .readout-fs .fs-btn:disabled{opacity:.4;cursor:default}
  .readout-fs .fs-val{font-family:var(--mono);font-size:10px;color:var(--muted);min-width:30px;text-align:center}
  /* floating cursor readout panel */
  #floatPanel{position:fixed;z-index:60;background:var(--panel2);border:1px solid var(--border);border-radius:8px;min-width:180px;min-height:120px;width:250px;box-shadow:0 8px 30px rgba(0,0,0,.55);overflow:hidden;resize:both;display:none;flex-direction:column}
  #floatPanel.show{display:flex}
  #floatPanel .fp-head{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:6px 9px;background:var(--panel);border-bottom:1px solid var(--border);cursor:move;user-select:none;font-size:11px;font-weight:600}
  #floatPanel .fp-drag{color:var(--muted);font-weight:400;font-size:10px}
  #floatPanel .fp-body{padding:7px 9px;font-size:var(--ot-readout-fs,11px);flex:1;overflow-y:auto}
  #floatPanel .fp-hint{color:var(--muted);font-style:italic}
  #floatPanel .tt-time{color:var(--muted);font-family:var(--mono);margin-bottom:5px;border-bottom:1px solid var(--border);padding-bottom:4px}
  #floatPanel .tt-row{display:flex;align-items:center;gap:6px;padding:1px 0}
  #floatPanel .tt-row .d{width:.82em;height:.82em;border-radius:2px;flex-shrink:0}
  #floatPanel .tt-row .n{flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  #floatPanel .tt-row .mod{color:inherit;opacity:.72;font-size:.9em}
  #floatPanel .tt-row .v{font-family:var(--mono);font-weight:600}
  /* tool panels */
  .tool-panel{display:none;border-bottom:1px solid var(--border);background:var(--panel);padding:10px 16px;max-height:230px;overflow-y:auto}
  .tool-panel.show{display:block}
  .tp-head{display:flex;align-items:center;gap:12px;font-size:12px;color:var(--muted);margin-bottom:8px;flex-wrap:wrap}
  .tp-head > span:first-child{font-weight:600;color:var(--text)}
  .tp-note{flex:1;font-style:italic}
  .tool-panel select{background:var(--panel2);border:1px solid var(--border);color:var(--text);border-radius:6px;padding:4px 7px;font-size:12px;font-family:var(--font);max-width:280px}
  /* measurement table */
  /* A -> B measurement summary (may span two channels with two different units) */
  .measure-summary{background:var(--panel2);border:1px solid var(--border);border-radius:8px;padding:9px 11px;margin:2px 0 10px;font-size:12px}
  .measure-summary .ms-grid{display:grid;grid-template-columns:auto 1fr;gap:3px 14px;align-items:baseline;margin-bottom:7px}
  .measure-summary .ms-k{color:var(--muted);font-size:10px;text-transform:uppercase;letter-spacing:.4px}
  .measure-summary .ms-v{font-family:var(--mono);font-weight:600;font-size:14px;color:var(--accent2)}
  .measure-summary .ms-warn{color:var(--muted);font-family:var(--font);font-size:10px;font-weight:400;white-space:nowrap}
  .measure-summary .ms-pt{display:flex;align-items:center;gap:7px;font-family:var(--mono);padding:1px 0}
  .measure-summary .ms-tag{display:inline-block;width:16px;height:16px;line-height:16px;text-align:center;border-radius:50%;color:#fff;font-size:10px;font-weight:700;font-family:var(--font);flex-shrink:0}
  .measure-summary .ms-mod{color:var(--muted);font-size:10px}
  .measure-table .ms-ch{font-family:var(--font);font-weight:600;max-width:170px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  .measure-table .ms-warn{color:var(--muted);font-family:var(--font);font-size:10px}
  .measure-table{width:100%;border-collapse:collapse;font-size:12px}
  .measure-table th{text-align:left;color:var(--muted);font-weight:600;font-size:10px;text-transform:uppercase;letter-spacing:.4px;padding:4px 8px;border-bottom:1px solid var(--border)}
  .measure-table td{padding:4px 8px;border-bottom:1px solid var(--border);font-family:var(--mono)}
  .measure-table td.lbl{font-family:var(--font)}
  .measure-table .ptdot{display:inline-block;width:16px;height:16px;line-height:16px;text-align:center;border-radius:50%;color:#fff;font-size:10px;font-weight:700;font-family:var(--font)}
  .measure-table .delta{color:var(--accent2)}
  .measure-table tr.delta-row td{color:var(--muted);border-bottom:1px dashed var(--border);font-size:11px}
  .measure-table .pt-actions{white-space:nowrap;text-align:right}
  .measure-table .pt-edit{background:var(--panel2);border:1px solid var(--border);color:var(--text);border-radius:6px;padding:2px 8px;font-size:11px;cursor:pointer;font-family:var(--font);margin-right:5px}
  .measure-table .pt-edit:hover{border-color:var(--accent)}
  .measure-table .pt-edit.active{background:var(--accent2);border-color:var(--accent2);color:#04260f}
  .measure-table .pt-del{background:transparent;border:1px solid var(--border);color:var(--muted);border-radius:6px;width:22px;height:22px;font-size:14px;line-height:1;cursor:pointer;font-family:var(--font)}
  .measure-table .pt-del:hover{color:#fff;background:var(--danger);border-color:var(--danger)}
  /* annotation list */
  .anno-row{display:flex;align-items:center;gap:10px;padding:5px 0;font-size:12px;border-bottom:1px solid var(--border)}
  .anno-row .ax{font-family:var(--mono);color:var(--muted);min-width:120px}
  .anno-row .alabel{flex:1}
  .anno-row .lk-ch{display:inline-flex;align-items:center;gap:4px;white-space:nowrap}
  .anno-row .lk-ch .d{width:.82em;height:.82em;border-radius:2px;flex-shrink:0}
  .anno-row .lk-sep{color:var(--muted);margin:0 6px}
  .anno-row .alabel{flex:1;white-space:pre-wrap}
  .anno-row .anno-x{color:var(--muted);cursor:pointer;font-size:14px;padding:0 4px}
  .anno-row .anno-x:hover{color:var(--danger)}
  /* scaling list */
  .scale-colhead{display:flex;align-items:center;padding:2px 0 6px;border-bottom:1px solid var(--border);margin-bottom:2px}
  .scale-colhead .sc-spacer{flex:1}
  .scale-colhead .sc-allauto{font-size:11px;padding:3px 10px}
  .scale-colhead .sc-kbd-hint{font-size:10px;color:var(--muted);margin-right:10px;border:1px solid var(--border);border-radius:4px;padding:2px 7px;white-space:nowrap}
  /* markup toolbar */
  .markup-bar{display:flex;align-items:center;gap:10px;flex-wrap:wrap;padding:6px 2px}
  .markup-colors{display:inline-flex;gap:5px}
  .markup-colors .mk-color{width:18px;height:18px;border-radius:4px;cursor:pointer;border:2px solid transparent}
  .markup-colors .mk-color.active{border-color:var(--text);box-shadow:0 0 0 1px var(--bg)}
  /* capture chooser popover */
  .capture-menu{position:absolute;z-index:70;background:var(--panel2);border:1px solid var(--border);border-radius:8px;padding:6px;box-shadow:0 8px 30px rgba(0,0,0,.55);display:none;flex-direction:column;gap:4px;min-width:180px}
  .capture-menu.show{display:flex}
  .capture-menu button{background:var(--panel2);border:1px solid var(--border);color:var(--text);border-radius:6px;padding:8px 10px;font-size:12px;cursor:pointer;font-family:var(--font);text-align:left}
  .capture-menu button:hover{border-color:var(--accent);color:var(--text)}
  .capture-menu .cap-title{font-size:10px;color:var(--muted);text-transform:uppercase;letter-spacing:.5px;padding:2px 4px}
  /* ---- tag / annotation text editing (Enter saves · Shift+Enter adds a line) ---- */
  textarea.tag-input{display:block;width:100%;resize:none;overflow-y:auto;line-height:1.45;
    max-height:calc(1.45em * 6 + 16px);font-family:var(--font);white-space:pre-wrap}
  .tag-input-hint{color:var(--muted);font-size:11px;margin-bottom:14px}
  /* markup text input (in-place) */
  .mk-text-input{position:absolute;z-index:71;background:var(--panel2);border:1px solid var(--accent);color:var(--text);border-radius:4px;padding:3px 6px;font-size:13px;font-family:var(--font);min-width:120px;
    resize:none;overflow-y:auto;line-height:1.4;max-height:calc(1.4em * 6 + 12px);white-space:pre-wrap}
  /* floating style toolbar for the selected drawing */
  .mk-editbar{position:absolute;z-index:72;display:none;align-items:center;gap:8px;background:var(--panel2);
    border:1px solid var(--border);border-radius:8px;padding:5px 8px;box-shadow:0 8px 26px rgba(0,0,0,.55)}
  .mk-editbar.show{display:flex}
  .mk-editbar .mk-eb-lbl{color:var(--muted);font-size:11px}
  .mk-editbar .mk-eb-num{background:var(--panel);border:1px solid var(--border);color:var(--text);border-radius:6px;padding:3px 5px;font-size:11px;font-family:var(--font)}
  .mk-editbar .mk-eb-text{width:180px;background:var(--panel);border:1px solid var(--border);color:var(--text);border-radius:6px;padding:3px 6px;font-size:12px}
  .mk-editbar .mk-eb-del{background:transparent;border:1px solid var(--border);color:var(--muted);border-radius:6px;padding:3px 7px;font-size:12px;line-height:1.2;cursor:pointer;font-family:var(--font)}
  .mk-editbar .mk-eb-del:hover{color:#fff;background:var(--danger);border-color:var(--danger)}
  .markup-bar select#markupWidth{background:var(--panel2);border:1px solid var(--border);color:var(--text);border-radius:6px;padding:3px 6px;font-size:11px;font-family:var(--font)}
  .scale-row{display:flex;align-items:center;gap:10px;padding:5px 0;font-size:12px;border-bottom:1px solid var(--border)}
  .scale-row .swatch{width:10px;height:10px;border-radius:3px;flex-shrink:0}
  .scale-row .snm{flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .scale-row .mode-pick{display:inline-flex;border:1px solid var(--border);border-radius:6px;overflow:hidden}
  .scale-row .mode-pick button{background:var(--panel2);border:0;color:var(--muted);font-size:11px;padding:3px 9px;cursor:pointer;font-family:var(--font)}
  .scale-row .mode-pick button.active{background:var(--accent);color:#fff}
  .scale-row input[type=number]{width:74px;background:var(--panel2);border:1px solid var(--border);color:var(--text);border-radius:6px;padding:3px 6px;font-size:11px;font-family:var(--mono)}
  .scale-row input:disabled{opacity:.4}
  .scale-row .rng-lbl{color:var(--muted);font-size:11px}
  .scale-row .yside{background:var(--panel2);border:1px solid var(--border);color:var(--text);border-radius:6px;padding:3px 6px;font-size:11px;font-family:var(--font)}

  /* ===== licensing bar (added by gate.js) ===== */
  .lic-bar{display:flex;align-items:center;gap:9px;padding:8px 16px;font-size:12px;border-bottom:1px solid var(--border);flex-shrink:0}
  .lic-bar .lic-dot{width:8px;height:8px;border-radius:50%;flex-shrink:0}
  .lic-bar.demo{background:linear-gradient(90deg,rgba(210,153,34,.12),rgba(210,153,34,.04));}
  .lic-bar.demo .lic-dot{background:var(--warn);box-shadow:0 0 8px var(--warn)}
  .lic-bar.licensed{background:linear-gradient(90deg,rgba(63,185,80,.12),rgba(63,185,80,.03));}
  .lic-bar.licensed .lic-dot{background:var(--accent2);box-shadow:0 0 8px var(--accent2)}
  .lic-bar strong{color:var(--text);font-weight:600}
  .lic-bar .lic-sep{color:var(--muted)}
  .lic-bar .lic-note{color:var(--muted)}
  .lic-bar .lic-grow{flex:1}
  .lic-bar .lic-link{color:var(--accent);font-weight:600}
  .lic-bar .lic-cta{background:var(--accent);border:1px solid var(--accent);color:#fff;border-radius:6px;padding:4px 12px;font-size:12px;font-weight:600;cursor:pointer;font-family:var(--font)}
  .lic-bar .lic-cta:hover{filter:brightness(1.08)}
  /* locked upload buttons in demo mode */
  body.is-demo #uploadBtn.locked{background:var(--panel2);border-color:var(--warn);color:var(--warn)}
  body.is-demo #uploadBtn.locked:hover{border-color:var(--warn)}
  /* mock note inside unlock modal */
  .mock-note{margin-top:16px;padding-top:14px;border-top:1px dashed var(--border);font-size:12px;color:var(--muted)}
  .mock-note .mock-btn{background:var(--panel2);border:1px solid var(--border);color:var(--text);border-radius:6px;padding:4px 10px;font-size:12px;cursor:pointer;margin-left:4px;font-family:var(--font)}
  .mock-note .mock-btn:hover{border-color:var(--accent)}
  a.btn{ text-decoration:none; }

  /* ---- digital signals ---- */
  /* toolbar toggle switch for the global "Digital flags" control */
  .switch{position:relative;display:inline-flex;align-items:center;cursor:pointer}
  .switch input{position:absolute;opacity:0;width:0;height:0}
  .switch .switch-track{width:30px;height:16px;border-radius:9px;background:var(--panel2);border:1px solid var(--border);transition:background .15s,border-color .15s;position:relative}
  .switch .switch-track::after{content:"";position:absolute;top:1px;left:1px;width:12px;height:12px;border-radius:50%;background:var(--muted);transition:transform .15s,background .15s}
  .switch input:checked + .switch-track{background:rgba(248,81,73,.35);border-color:#f85149}
  .switch input:checked + .switch-track::after{transform:translateX(14px);background:#f85149}

  /* hover chip for a flag dot */
  .dig-tip{position:absolute;z-index:31;background:var(--panel2);border:1px solid var(--border);border-radius:7px;padding:6px 9px;font-size:11px;pointer-events:none;box-shadow:0 6px 22px rgba(0,0,0,.5);max-width:320px;display:none;line-height:1.5}
  .dig-tip .dig-name{font-weight:600;color:var(--text);margin-right:6px}
  .dig-tip .dig-state{font-family:var(--mono);font-weight:700;font-size:10px;padding:0 5px;border-radius:4px}
  .dig-tip .dig-state.on{color:#f85149;background:rgba(248,81,73,.15)}
  .dig-tip .dig-state.off{color:var(--muted);background:rgba(139,148,158,.15)}
  .dig-tip .dig-mod{display:block;color:var(--muted);font-size:10px;margin-top:2px}
  .dig-tip .dig-time{display:block;color:var(--muted);font-family:var(--mono);font-size:10px}
  .dig-tip .dig-chead{font-weight:600;color:var(--text);font-size:10px;margin-bottom:4px;padding-bottom:3px;border-bottom:1px solid var(--border);font-family:var(--mono)}
  .dig-tip .dig-crow{display:flex;align-items:center;gap:6px;padding:1px 0}
  .dig-tip .dig-crow .dig-cname{color:var(--text);font-size:11px}

  /* sidebar section */
  .dig-section{border-top:1px dashed var(--border);margin-top:4px}
  .dig-head{display:flex;align-items:center;gap:6px;cursor:pointer;user-select:none;color:#f0776f}
  .dig-head .caret{color:var(--muted);font-size:10px;transition:transform .15s;width:12px;text-align:center}
  .dig-section.collapsed .caret{transform:rotate(-90deg)}
  .dig-section.collapsed .dig-body{display:none}
  .dig-head .dig-title{flex:1}
  .dig-head .dig-count{color:var(--muted);font-size:10px}
  .dig-subgroup{padding-left:14px;color:var(--muted)}
  .dig-item .dig-sw{border-radius:50%;border:1px solid #f85149;background:transparent}
  .dig-item .dig-sw.on{background:#f85149}
  .dig-item.inactive .nm{color:var(--muted);opacity:.6}
  .dig-item.inactive .dig-sw{border-color:var(--border)}
  .dig-item.off .dig-sw{background:transparent}

  /* "No Data" section: reference-only channels with zero usable values */
  .nd-section{border-top:1px dashed var(--border);margin-top:4px}
  .nd-head{display:flex;align-items:center;gap:6px;cursor:pointer;user-select:none;color:var(--muted)}
  .nd-head .caret{color:var(--muted);font-size:10px;transition:transform .15s;width:12px;text-align:center}
  .nd-section.collapsed .caret{transform:rotate(-90deg)}
  .nd-section.collapsed .nd-body{display:none}
  .nd-head .nd-title{flex:1}
  .nd-head .nd-count{color:var(--muted);font-size:10px}
  .nd-item{cursor:default;opacity:.55}
  .nd-item:hover{background:transparent}
  .nd-item .nd-sw{border-radius:2px;border:1px dashed var(--border);background:transparent}
  .nd-item .nm{color:var(--muted)}
  .nd-item .nd-tag{font-size:9px;text-transform:uppercase;letter-spacing:.04em;color:var(--muted);
    border:1px solid var(--border);border-radius:3px;padding:1px 5px;margin-left:auto;white-space:nowrap}

  /* ---- horizontally scrollable channel column ----
     Long qualified names (Engine_1.Cylinder_3.ExhaustTemp_DegC) are fully readable by
     scrolling the name area sideways. One row per channel, never wrapped, and the panel
     keeps its width. The swatch and the value/tag stay pinned while the name scrolls
     underneath them (background:inherit picks up the row's hover colour). */
  .mod-channels,.dig-body,.nd-body{overflow-x:auto;overscroll-behavior-x:contain;scrollbar-width:thin}
  .series-item{min-width:min-content;background:var(--panel)}
  .series-item:hover{background:var(--panel2)}
  .series-item .si-lead,.series-item .si-trail{position:sticky;display:inline-flex;align-items:center;
    background:inherit;z-index:2;flex:0 0 auto}
  .series-item .si-lead{left:0;padding-right:8px}
  .series-item .si-trail{right:0;padding-left:10px;justify-content:flex-end}
  .mod-channels .series-item .si-lead{left:-4px;padding-left:4px}
  .mod-channels .series-item .si-trail{right:-4px;padding-right:4px}
  /* the name is the only part that scrolls: no wrap, no ellipsis, no shrinking */
  .series-item .nm{flex:1 0 auto;white-space:nowrap;overflow:visible;text-overflow:clip}
  /* section headings stay put while the rows beside them scroll */
  .group-title{position:sticky;left:0}