/* Generated by scripts/build-exampreview.mjs from test-bank.html, test-bank-current-attempt-review.js and test-bank-formulas.js. Do not edit. */
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  .tb-crumb a{color:var(--muted);font-weight:600} .tb-crumb b{color:var(--ink)}
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  .tb-hero p{font-size:15.5px;line-height:1.6;color:var(--muted);max-width:66ch;margin:0 0 26px}
  .tb-hero.exam h1{font-size:26px;margin-bottom:4px}
  .tb-hero.exam{margin-bottom:18px}
  .tb-shell{display:grid;grid-template-columns:1fr 330px;gap:24px;align-items:start}
  .tb-shell.exam-mode{grid-template-columns:1fr}
  .tb-shell.exam-mode .tb-rail{display:none}
  .tb-shell.focused-exam{grid-template-columns:minmax(0,1fr)}
  .tb-shell.focused-exam .tb-rail{display:none}
  .tb-quizback{margin-top:20px;display:flex;justify-content:flex-start}
  .tb-backsim{display:inline-flex;align-items:center;gap:7px;border:1px solid var(--line);background:var(--tint);color:var(--ink);font-family:"Work Sans",sans-serif;font-weight:600;font-size:13.5px;border-radius:9px;padding:10px 15px;cursor:pointer;transition:background-color .15s ease,border-color .15s ease}
  .tb-backsim:hover{border-color:var(--teal);color:var(--teal)}
  .tb-main{min-width:0}
  /* overview card */
  .tb-pane{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:24px}
  .tb-ovbadge{display:inline-flex;align-items:center;gap:10px;margin-bottom:14px}
  .tb-badge{width:50px;height:50px;border-radius:11px;display:grid;place-items:center;font-family:"Source Serif 4",serif;font-weight:700;font-size:14px;color:#fff}
  .tb-ovsub{font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);font-weight:700}
  .tb-title{font-family:"Source Serif 4",serif;font-size:25px;line-height:1.15;color:var(--ink);margin:2px 0 8px;display:flex;flex-wrap:wrap;align-items:center;gap:12px}
  .tb-soon{display:inline-flex;align-items:center;gap:7px;font-family:"Work Sans",sans-serif;font-size:11.5px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:#3a2a06;background:linear-gradient(135deg,#f3c368,#dca63c);border-radius:999px;padding:6px 13px;box-shadow:0 0 0 0 #dca63c66;animation:tbGlow 2.4s ease-in-out infinite}
  .tb-soon::before{content:"";width:7px;height:7px;border-radius:50%;background:#3a2a06}
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  .tb-soonline{color:var(--amber,#b8791b);font-size:14px;font-weight:600;margin:0 0 18px}
  html[data-theme="dark"] .tb-soonline{color:#f0c36a}
  .tb-stats{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:24px}
  .tb-stat{flex:1;min-width:120px;background:var(--tint);border:1px solid var(--line);border-radius:10px;padding:13px 15px}
  .tb-stat .k{font-size:10.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);font-weight:700}
  .tb-stat .v{font-family:"Source Serif 4",serif;font-size:21px;font-weight:700;color:var(--ink);margin-top:3px}
  .tb-stat .v small{font-size:12px;color:var(--muted);font-weight:500}
  .tb-sec{font-size:11.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);font-weight:700;margin:0 0 12px}
  .tb-weightbar{display:flex;height:14px;border-radius:7px;overflow:hidden;border:1px solid var(--line);margin-bottom:14px}
  .tb-weightbar span{min-width:0}
  .tb-legend{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:9px 18px;margin-bottom:26px}
  .tb-dl{display:flex;align-items:center;gap:9px;font-size:13.5px;color:var(--ink)}
  .tb-dl i{width:11px;height:11px;border-radius:3px;flex:none}
  .tb-dl .sub{color:var(--muted);font-size:11.5px} .tb-dl .w{margin-left:auto;color:var(--muted);font-size:12.5px;font-weight:600}
  .tb-cta{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
  .tb-disabled{border:1px solid var(--line);background:var(--tint);color:var(--muted);border-radius:8px;padding:12px 18px;font-weight:600;font-size:14px;cursor:not-allowed}
  /* right rail */
  .tb-rail h2{font-family:"Source Serif 4",serif;font-size:18px;color:var(--ink);margin:0}
  .tb-railhead{display:flex;align-items:baseline;justify-content:space-between;margin:2px 2px 12px}
  .tb-railhead span{font-size:12px;color:var(--muted)}
  .tb-group{margin-bottom:16px} .tb-group .gl{font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);font-weight:700;margin:0 4px 8px}
  .tb-tile{width:100%;text-align:left;display:grid;grid-template-columns:auto 1fr;gap:13px;align-items:center;background:var(--card);border:1px solid var(--line);border-radius:11px;padding:13px 14px;margin-bottom:8px;color:var(--ink);cursor:pointer;transition:.14s;position:relative}
  .tb-tile:hover{border-color:var(--teal)} .tb-tile.active{border-color:var(--teal);background:var(--tint)}
  .tb-tile.active::before{content:"";position:absolute;left:0;top:12px;bottom:12px;width:3px;border-radius:3px;background:var(--teal)}
  .tb-tile .tb-badge{width:44px;height:44px;font-size:12px;border-radius:9px;align-self:start}
  .tb-tinfo{display:flex;flex-direction:column;align-items:flex-start;gap:6px;min-width:0}
  .tb-tn{font-weight:700;font-size:13.5px;line-height:1.3;color:var(--ink)}
  .tb-tm{font-size:11.5px;color:var(--muted);line-height:1.3}
  .tb-tag{display:inline-flex;align-items:center;gap:6px;font-size:9.5px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:#9a6a12;background:rgba(220,166,60,.14);border:1px solid rgba(220,166,60,.34);border-radius:99px;padding:3px 9px}
  .tb-tag::before{content:"";width:5px;height:5px;border-radius:50%;background:#d99a2a}
  html[data-theme="dark"] .tb-tag{color:#f0c36a}
  .tb-modes{display:grid;gap:12px;margin-bottom:22px}
  .tb-mode{border:1px solid var(--line);border-radius:11px;padding:16px 18px;background:var(--tint)}
  .tb-mode-head{display:flex;gap:12px;align-items:flex-start;margin-bottom:14px}
  .tb-mode-ic{width:38px;height:38px;flex:none;border-radius:9px;display:grid;place-items:center;background:var(--card);border:1px solid var(--line);color:var(--teal);font-size:16px}
  .tb-mode-head h4{font-family:"Source Serif 4",serif;font-size:16px;color:var(--ink);margin:0 0 3px}
  .tb-mode-head p{font-size:13px;color:var(--muted);margin:0;line-height:1.45}
  .tb-mode-controls{display:flex;flex-wrap:wrap;gap:10px 16px;align-items:center;margin-bottom:14px}
  /* stacked variant: one labeled row per control group (Set / Area / Questions / Timing /
     Filters), used by Quick Quiz and Focused Quiz where the flat single-row layout got too
     crowded. Full Exam keeps the original flat layout -- it only ever has one row (Timing). */
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  .tb-fieldrow{display:flex;align-items:center;gap:14px;padding:10px 0;border-bottom:1px solid var(--line);flex-wrap:wrap}
  .tb-mode-controls.stacked .tb-fieldrow:first-child{padding-top:0}
  .tb-mode-controls.stacked .tb-fieldrow:last-child{border-bottom:0;padding-bottom:0}
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  .tb-fieldrow-value{display:flex;flex-wrap:wrap;gap:8px;align-items:center;flex:1;min-width:0}
  .tb-ctl-label{font-size:10.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);font-weight:700}
  .tb-timing-choice{display:inline-flex;align-items:center;gap:10px;min-width:0}
  .tb-seg{display:inline-flex;border:1px solid var(--line);border-radius:8px;overflow:hidden;background:var(--card)}
  .tb-seg button{border:0;background:none;padding:8px 15px;font:inherit;font-size:13px;font-weight:600;color:var(--muted);cursor:pointer;transition:.12s}
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  .tb-seg button.on{background:var(--teal);color:#fff;box-shadow:inset 0 0 0 1px color-mix(in srgb,#fff 38%,transparent)}
  .tb-counts{display:inline-flex;gap:6px}
  .tb-mode-controls.stacked .tb-fieldrow{width:100%;min-width:0}
  .tb-quiz-set-choices{display:flex;flex-wrap:wrap;gap:6px;min-width:0;max-width:100%}
  .tb-quiz-set-choices .tb-count{min-height:44px;min-width:56px;white-space:normal;transform:none}
  .tb-quiz-set-choices .tb-count:focus-visible{outline:2px solid var(--teal);outline-offset:2px}
  @media(max-width:420px){.tb-mode-controls.stacked .tb-fieldrow{gap:8px}.tb-mode-controls.stacked .tb-fieldrow-label{width:68px}.tb-mode-controls.stacked .tb-counts{flex-wrap:wrap}.tb-mode-controls.stacked .tb-select{min-width:0;max-width:100%}}
  .tb-count{border:1px solid var(--line);background:var(--card);border-radius:7px;min-width:42px;padding:7px 10px;font:inherit;font-size:13px;font-weight:600;color:var(--ink);cursor:pointer;transition:.12s}
  .tb-count.on{border-color:var(--teal);background:var(--teal);color:#fff}
  .tb-count[disabled]{opacity:.45;cursor:not-allowed}
  .tb-select{border:1px solid var(--line);background:var(--card);color:var(--ink);border-radius:8px;padding:8px 10px;font:inherit;font-size:13px}
  .tb-unseen{display:inline-flex;align-items:center;gap:7px;border:1px solid var(--line);background:var(--card);border-radius:99px;padding:6px 12px 6px 8px;font:inherit;font-size:12.5px;font-weight:600;color:var(--muted);cursor:pointer;transition:.12s}
  .tb-unseen .sw{width:26px;height:15px;border-radius:99px;background:var(--line);position:relative;flex:none;transition:.15s}
  .tb-unseen .sw::after{content:"";position:absolute;top:2px;left:2px;width:11px;height:11px;border-radius:50%;background:#fff;transition:.15s}
  .tb-unseen.on{border-color:var(--teal);color:var(--ink)}
  .tb-unseen.on .sw{background:var(--teal)}
  .tb-unseen.on .sw::after{left:13px}
  .tb-unseen[disabled]{opacity:.45;cursor:not-allowed}
  .tb-mstart[disabled]{opacity:.5;cursor:not-allowed}
  .tb-mode-foot{display:flex;flex-wrap:wrap;gap:10px 14px;align-items:center;justify-content:space-between}
  .tb-mode-sum{font-size:12.5px;color:var(--muted);flex:1 1 320px}
  .tb-mode-foot .tb-mstart,.tb-mode-foot .tb-start{margin-left:auto}
  .tb-mode-sum b{color:var(--ink);font-weight:600}.tb-newonly-error{display:block;margin-top:5px;color:#b53e39;font-weight:600}
  .tb-time-summary{display:inline}
  .tb-start{border:1px solid var(--line);background:var(--card);color:var(--muted);border-radius:8px;padding:9px 15px;font-weight:600;font-size:12.5px;display:inline-flex;align-items:center;gap:8px;white-space:nowrap;cursor:not-allowed}
  .tb-start .dot{width:6px;height:6px;border-radius:50%;background:#d99a2a;flex:none}
  .tb-requestlink{display:inline-block;font-weight:700;font-size:13.5px;color:var(--teal)}
  /* adaptive: rail readiness tags */
  .tb-tag.ready,.tb-tag.live{color:#0e7566;background:rgba(43,183,173,.14);border:1px solid rgba(43,183,173,.4)}
  .tb-tag.ready::before,.tb-tag.live::before{display:none}
  .tb-tag .d2{width:5px;height:5px;border-radius:50%;background:#2bb7ad}
  html[data-theme="dark"] .tb-tag.ready,html[data-theme="dark"] .tb-tag.live{color:#67d4df}
  /* diagnostic banner */
  .tb-diag{border:1px solid var(--teal);border-radius:12px;padding:20px;margin-bottom:24px;background:linear-gradient(180deg,color-mix(in srgb,var(--teal) 8%,var(--card)),var(--card))}
  .tb-diag-top{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;margin-bottom:8px}
  .tb-diag-kick{font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--teal);font-weight:700;margin-bottom:2px}
  .tb-diag h4{font-family:"Source Serif 4",serif;font-size:21px;color:var(--ink);margin:0}
  .tb-badge2{font-size:12px;font-weight:700;color:var(--muted);border:1px solid var(--line);border-radius:99px;padding:5px 12px;white-space:nowrap}
  .tb-diag-sub{font-size:13.5px;line-height:1.55;color:var(--muted);margin:0 0 16px} .tb-diag-sub b{color:var(--ink)}
  .tb-diag-cta{display:flex;flex-wrap:wrap;gap:10px}
  .tb-ghost{border:1px solid var(--line);background:transparent;color:var(--ink);border-radius:8px;padding:10px 16px;font:inherit;font-weight:600;font-size:13px;cursor:pointer}
  .tb-ghost:hover{border-color:var(--teal)}
  @media(max-width:560px){
    .tb-mode{padding:15px 14px}
    .tb-mode-controls{gap:10px 12px}
    .tb-timing-choice{max-width:100%}
    .tb-select{max-width:100%}
    .tb-diag-top{flex-wrap:wrap}
    .tb-diag-cta>*{max-width:100%;white-space:normal}
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  @media(max-width:420px){
    .tb-fieldrow{flex-direction:column;align-items:flex-start;gap:6px}
    .tb-fieldrow-label{width:auto}
  }
  /* readiness ring */
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  .tb-ring::before{content:"";position:absolute;inset:6px;border-radius:50%;background:var(--card)}
  .tb-ring span{position:relative;font-family:"Source Serif 4",serif;font-weight:700;font-size:16px;color:var(--ink)}
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  /* quiz player */
  .tb-quiztop{display:flex;align-items:flex-start;justify-content:space-between;gap:14px;margin-bottom:12px}
  .tb-quizprog{font-size:12.5px;color:var(--muted);margin-top:2px}
  .tb-progress{height:6px;background:var(--tint);border:1px solid var(--line);border-radius:99px;overflow:hidden;margin-bottom:18px}
  .tb-progress>span{display:block;height:100%;background:linear-gradient(90deg,var(--teal),var(--teal-dark))}
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  .tb-qtag i{width:8px;height:8px;border-radius:2px}
  .tb-stem{font-size:17px;line-height:1.55;color:var(--ink);font-weight:600;margin-bottom:18px}
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  @media(max-width:420px){.tb-q-chart-wrap{padding:12px 10px}}
  .tb-q-chart-wrap-compact{max-width:220px;margin-left:auto;margin-right:auto}
  .tb-source-figure{margin:0 0 16px;max-width:100%;box-sizing:border-box;text-align:center}
  .tb-source-image-link{display:block;width:fit-content;max-width:100%;margin:0 auto;background:#fff;border-radius:4px;padding:6px;box-sizing:border-box}
  .tb-source-image{display:block;width:auto;max-width:min(100%,720px);height:auto;margin:0 auto;background:#fff;filter:none!important;mix-blend-mode:normal}
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  .tb-source-figure figcaption a{color:var(--teal);text-decoration:underline;text-underline-offset:3px}
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  .tb-source-figure .tb-sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
  .tb-q-chart-eyebrow{display:block;font-size:10.5px;font-weight:700;letter-spacing:.09em;text-transform:uppercase;color:var(--teal);margin:0 0 10px}
  .tb-q-chart{width:100%;min-width:280px;max-width:560px;display:block;margin:0 auto}
  .tb-q-chart-symbol{max-width:130px;min-width:110px}
  .tb-q-chart-quad{max-width:420px}
  .tb-chart-limit{stroke:#c0453f;stroke-width:1.1;stroke-dasharray:4 3;opacity:.72}
  .tb-chart-cl{stroke:var(--muted);stroke-width:1.1}
  .tb-chart-line{stroke:#6656b5;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
  .tb-chart-dot{fill:#6656b5;stroke:var(--card);stroke-width:1.5}
  .tb-chart-dot-out{fill:#c0453f;stroke:var(--card);stroke-width:1.5}
  .tb-chart-grid{stroke:var(--line);stroke-width:1;opacity:.8}
  .tb-chart-whisker{stroke:var(--ink);stroke-width:1.4;stroke-linecap:round}
  .tb-chart-box{fill:color-mix(in srgb,#6656b5 15%,var(--card));stroke:var(--ink);stroke-width:1.4}
  .tb-chart-box-roof{fill:color-mix(in srgb,var(--teal) 16%,var(--card));stroke:var(--teal)}
  .tb-chart-median{stroke:var(--ink);stroke-width:2;stroke-linecap:round}
  .tb-chart-mean{fill:#6656b5;font-weight:700}
  .tb-chart-label-halo{paint-order:stroke;stroke:var(--tint);stroke-width:4px;stroke-linejoin:round}
  .tb-chart-outlier{fill:none;stroke:#c0453f;stroke-width:1.8}
  .tb-chart-band{stroke:var(--muted);stroke-width:1;stroke-dasharray:3 3;opacity:.65}
  .tb-chart-ring{fill:none;stroke:var(--muted);stroke-width:1;opacity:.55}
  .tb-chart-ring-inner{opacity:.9}
  .tb-chart-target-dot{fill:var(--ink);stroke:var(--card);stroke-width:1.3}
  .tb-q-chart-quad-hi .tb-chart-ring{stroke:#6656b5;opacity:.95}
  .tb-q-chart-quad-hi .tb-chart-target-dot{fill:#6656b5}
  .tb-q-chart-quad-hi .tb-chart-box{fill:color-mix(in srgb,#6656b5 28%,var(--card));stroke:#6656b5}
  .tb-q-data-table{width:100%;border-collapse:separate;border-spacing:0;font-size:13px;border-radius:8px;overflow:hidden;border:1px solid var(--line)}
  .tb-q-table-title{margin:0 0 8px;font-size:13px;font-weight:700;color:var(--ink);line-height:1.35}
  .tb-stem mjx-container[display="true"],.tb-explanation-copy mjx-container[display="true"]{display:block;margin:.65em 0;overflow-x:auto;max-width:100%}
  .tb-q-data-table th{background:var(--card);color:var(--ink);font-weight:700;text-align:center;padding:9px 12px;border-bottom:2px solid var(--line);border-right:1px solid var(--line);font-size:10.5px;letter-spacing:.04em;text-transform:uppercase}
  .tb-q-data-table th:last-child{border-right:none}
  .tb-q-data-table td{padding:8px 12px;border-bottom:1px solid var(--line);border-right:1px solid var(--line);color:var(--ink);text-align:center;overflow-wrap:anywhere}
  .tb-q-data-table td.tb-q-text,.tb-q-data-table th.tb-q-text{text-align:left}
  .tb-q-data-table td:last-child{border-right:none}
  .tb-q-data-table tr:last-child td{border-bottom:none}
  .tb-q-data-table tr:nth-child(even) td{background:color-mix(in srgb,var(--tint) 55%,var(--card))}
  .tb-q-data-table td.tb-q-num{font-variant-numeric:tabular-nums}
  .tb-chart-whatif{display:grid;grid-template-columns:minmax(150px,1fr) minmax(180px,2fr);gap:8px 14px;align-items:center;margin-top:13px;padding:11px 12px;border:1px solid var(--line);border-radius:8px;background:var(--card);font-size:12px;color:var(--muted)}
  .tb-chart-whatif label{font-weight:700;color:var(--ink)}
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  .tb-chart-whatif p{grid-column:1/-1;margin:0;line-height:1.4}
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  .tb-chart-risk-medium{fill:color-mix(in srgb,#b8791b 26%,var(--card));stroke:var(--line);stroke-width:1}
  .tb-chart-risk-high{fill:color-mix(in srgb,#c0453f 26%,var(--card));stroke:var(--line);stroke-width:1}
  .tb-chart-risk-hi{stroke:var(--ink);stroke-width:2.4}
  .tb-opt{display:flex;gap:12px;align-items:flex-start;width:100%;text-align:left;background:var(--tint);border:1px solid var(--line);border-radius:11px;padding:14px 15px;margin-bottom:10px;color:var(--ink);font:inherit;font-size:15px;cursor:pointer;transition:.12s}
  .tb-opt:hover{border-color:var(--teal)} .tb-opt.sel{border-color:var(--teal);background:color-mix(in srgb,var(--teal) 12%,var(--card))}
  .tb-opt .k{width:26px;height:26px;flex:none;border-radius:7px;border:1px solid var(--line);display:grid;place-items:center;font-weight:700;font-size:13px;color:var(--muted)}
  .tb-opt.sel .k{background:var(--teal);color:#fff;border-color:transparent}
  .tb-quizfoot{display:flex;align-items:center;gap:14px;justify-content:space-between;margin-top:18px;flex-wrap:wrap}
  .tb-nav{display:flex;flex-wrap:wrap;gap:6px}
  .tb-nav-long{flex:1 1 240px;min-width:min(100%,240px);max-height:156px;overflow:auto;padding:8px;border:1px solid var(--line);border-radius:10px;background:var(--card)}
  .tb-nav-long .tb-navcell{width:36px;height:36px;font-size:11px;padding:0}
  .tb-nav-long .tb-navcell::before{content:'';font-size:0;line-height:0}
  .tb-navcell{position:relative;display:grid;place-items:center;flex-shrink:0;width:44px;height:48px;padding:4px;border-radius:8px;border:1px solid currentColor;background:color-mix(in srgb,var(--status-neutral) 7%,var(--card));color:var(--status-neutral);font:inherit;font-size:12px;font-weight:600;cursor:pointer}
  .tb-navcell::before{content:'○';font-size:16px;line-height:16px}
  .tb-navcell.done{background:#0e7490;color:#fff;border-color:var(--status-answered)}
  .tb-navcell.done::before{content:'●'}
  .tb-navcell.cur{outline:3px solid var(--status-current);outline-offset:2px}
  .tb-status-key{display:flex;flex-wrap:wrap;gap:8px 16px;font-size:12px;line-height:1.6;color:var(--ink);margin:16px 0}
  .tb-status-key span{display:inline-flex;align-items:center;gap:5px}
  /* results */
  .tb-resbar{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:18px}
  .tb-restag{font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);font-weight:700}
  .tb-reshead{display:flex;gap:22px;align-items:center;padding-bottom:22px;border-bottom:1px solid var(--line);margin-bottom:22px}
  .tb-resverd h2{font-family:"Source Serif 4",serif;font-size:21px;color:var(--ink);margin:0 0 6px}
  .tb-resverd p{font-size:13.5px;color:var(--muted);margin:0;line-height:1.55}
  .tb-delta{font-size:12px;font-weight:700;margin-left:6px} .tb-delta.up{color:#1f9d6b}.tb-delta.down{color:#c0453f}
  .tb-plan{display:grid;gap:10px;margin-bottom:16px}
  .tb-planrow{display:grid;grid-template-columns:auto 1fr;gap:13px;border:1px solid var(--line);border-radius:11px;padding:14px 16px;background:var(--tint)}
  .tb-planrow.top{border-color:#c0453f55;background:color-mix(in srgb,#c0453f 7%,var(--card))}
  .tb-planrank{width:26px;height:26px;border-radius:7px;background:var(--card);border:1px solid var(--line);display:grid;place-items:center;font-weight:700;font-size:13px;color:var(--muted)}
  .tb-planname{font-weight:700;font-size:14.5px;color:var(--ink);margin-bottom:3px}
  .tb-planflag{font-size:10px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:#c0453f;background:rgba(192,69,63,.13);border-radius:99px;padding:2px 8px;margin-left:4px}
  .tb-planwhy{font-size:13px;color:var(--muted);line-height:1.5;margin-bottom:7px} .tb-planwhy b{color:var(--ink)}
  .tb-planlink{font-size:12.5px;font-weight:700;color:var(--teal)}
  .mut{color:var(--muted)}
  .tb-planacts{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:26px}
  .tb-score-result{border:1px solid var(--line);border-radius:12px;background:var(--paper);color:var(--ink);padding:16px;margin:0 0 20px;overflow-wrap:anywhere}
  .tb-score-result strong{font-size:20px}.tb-score-result p{margin:8px 0 0;font-size:13px;color:var(--ink)}
  .tb-breakdown{display:grid;gap:12px;margin-bottom:16px}
  .tb-domblock{border:1px solid var(--line);border-radius:11px;padding:14px 16px;background:var(--tint)}
  .tb-domhead{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}
  .tb-domn{display:flex;align-items:center;gap:9px;font-weight:700;font-size:14.5px;color:var(--ink)} .tb-domn i{width:11px;height:11px;border-radius:3px}
  .tb-domp{font-weight:700;font-size:15px;color:var(--ink)}
  .tb-sub{display:grid;grid-template-columns:1fr auto;gap:4px 12px;align-items:center;padding:8px 0;border-top:1px solid var(--line)}
  .tb-subn{font-size:13px;color:var(--ink)} .tb-subp{font-size:12.5px;font-weight:700}
  .tb-subbar{grid-column:1/-1;height:5px;background:var(--card);border:1px solid var(--line);border-radius:99px;overflow:hidden}
  .tb-subbar>span{display:block;height:100%}
  .tb-srnote{font-size:12px;color:var(--muted);line-height:1.5;margin:14px 0 0}
  .tb-modenote{font-size:12.5px;color:var(--muted);margin:-6px 0 12px}
  .tb-setpick{border:1px solid var(--line);background:var(--tint);border-radius:12px;padding:14px 16px;margin:2px 0 20px}
  .tb-setpick-lab{font-size:11.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);font-weight:700;margin-bottom:10px}
  .tb-setseg{display:flex;gap:8px;flex-wrap:wrap}
  .tb-setbtn{flex:1;min-width:100px;display:flex;flex-direction:column;align-items:flex-start;gap:2px;border:1px solid var(--line);background:var(--paper);color:var(--ink);border-radius:9px;padding:9px 13px;cursor:pointer;font-family:"Work Sans",sans-serif;transition:border-color .15s ease,box-shadow .15s ease}
  .tb-setbtn:hover{border-color:var(--teal)}
  .tb-setbtn.on{border-color:var(--teal);box-shadow:inset 0 0 0 1px var(--teal)}
  .tb-setl{font-weight:700;font-size:14px}
  .tb-sets{font-size:11.5px;color:var(--muted)}
  .tb-setbtn.on .tb-sets{color:var(--teal)}
  .tb-setbtn:disabled{cursor:not-allowed;opacity:.72;background:var(--card)}
  .tb-setbtn:disabled:hover{border-color:var(--line)}
  .tb-setnote{font-size:12.5px;color:var(--muted);margin:10px 0 0}
  .tb-soon.sample{color:#0e7566;background:rgba(43,183,173,.16);box-shadow:none;animation:none}
  .tb-soon.sample::before{background:#0e7566}
  html[data-theme="dark"] .tb-soon.sample{color:#67d4df}
  /* exam realism: toolbar, timer, flag */
  .tb-toolbar{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
  .tb-timer{font-family:"IBM Plex Mono","Work Sans",monospace;font-variant-numeric:tabular-nums;font-weight:700;font-size:16px;color:var(--ink);border:1px solid var(--line);border-radius:8px;padding:7px 12px;background:var(--tint);min-width:78px;text-align:center}
  .tb-timer.warn{color:#b8791b;border-color:#b8791b66}
  .tb-timer.danger{color:#c0453f;border-color:#c0453f;animation:tbPulse 1s infinite}
  .tb-timer.untimed{font-family:inherit;font-weight:600;font-size:12.5px;color:var(--muted)}
  @keyframes tbPulse{0%,100%{opacity:1}50%{opacity:.55}}
  .tb-tbtn{border:1px solid var(--line);background:var(--card);color:var(--ink);border-radius:8px;padding:7px 12px;font:inherit;font-weight:600;font-size:12.5px;cursor:pointer;white-space:nowrap}
  .tb-tbtn:hover{border-color:var(--teal)} .tb-tbtn.on{background:color-mix(in srgb,var(--status-flag) 10%,var(--card));color:var(--status-flag);border-color:var(--status-flag)}
  .tb-navcell.flag::after{content:'⚑';position:absolute;right:-5px;top:-8px;padding:0 4px;border:2px solid var(--card);border-radius:5px;background:#ff9500;color:#172b3a;font-size:18px;font-weight:800;line-height:22px}
  .tb-tbtn.on{background:#ff9500;color:#172b3a;border-color:#b45309}
  .tb-quiz{--reveal-blue:#1d4ed8;--reveal-bg:#eff6ff;--status-neutral:#475569;--status-answered:#0e7490;--status-flag:#8b5c0c;--status-current:#344054}
  html[data-theme="dark"] .tb-quiz{--reveal-blue:#93c5fd;--reveal-bg:#102440;--status-neutral:#cbd5e1;--status-answered:#67d4df;--status-flag:#f0c36a;--status-current:#f8fafc}
  .tb-navcell.revealed{background:#1d4ed8;border-color:var(--reveal-blue);color:#fff}
  .tb-navcell.revealed::before{content:'';width:16px;height:16px;background:currentColor;mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath fill='none' stroke='black' stroke-width='2' d='M2 12s3.5-7 10-7 10 7 10 7-3.5 7-10 7S2 12 2 12Z'/%3E%3Ccircle fill='none' stroke='black' stroke-width='2' cx='12' cy='12' r='3'/%3E%3C/svg%3E") center/contain no-repeat}
  .tb-reveal-hint{font-size:12.5px;line-height:1.5;color:var(--muted);margin:0 0 14px}
  .tb-tbtn[data-reveal]:disabled{cursor:default;color:var(--reveal-blue);border-color:var(--reveal-blue);background:var(--reveal-bg)}
  .tb-revealed-answer{margin:18px 0;padding:16px;border:2px solid var(--reveal-blue);border-radius:10px;background:var(--reveal-bg);color:var(--ink);scroll-margin-top:100px;overflow-wrap:anywhere}
  .tb-revealed-answer h3{font-size:17px;margin:0 0 10px;color:var(--reveal-blue)}
  .tb-revealed-answer p{line-height:1.6;margin:8px 0}
  .tb-revealed-answer .tb-explanation{margin-top:14px;line-height:1.65}
  .tb-revealed-answer .tb-explanation-title{font-weight:700;margin-bottom:6px}
  .tb-revealed-answer summary{cursor:pointer;font-weight:600}
  .tb-revealed-answer:focus-visible{outline:3px solid var(--reveal-blue);outline-offset:3px}
  .tb-opt:disabled{cursor:default;opacity:1}
  .tb-opt.reveal-correct{border-color:var(--reveal-blue);background:var(--reveal-bg)}
  .tb-opt.reveal-correct .k{background:var(--reveal-blue);color:var(--card);border-color:var(--reveal-blue)}
  .tb-timing{display:flex;align-items:center;gap:10px;margin-bottom:12px}
  /* tool layer */
  #tb-toollayer .tb-x{border:0;background:none;font-size:22px;line-height:1;color:var(--muted);cursor:pointer;padding:0 4px}
  #tb-toollayer .tb-x:hover{color:var(--ink)}
  .tb-drawer{position:fixed;top:0;right:0;bottom:0;width:380px;max-width:92vw;background:var(--paper);border-left:1px solid var(--line);box-shadow:-16px 0 40px -24px rgba(0,0,0,.5);z-index:60;display:flex;flex-direction:column;padding:18px}
  .tb-drawer[hidden]{display:none}
  .tb-drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}
  .tb-drawer-head h3{font-family:"Source Serif 4",serif;font-size:18px;color:var(--ink);margin:0}
  .tb-refsearch{width:100%;border:1px solid var(--line);background:var(--card);color:var(--ink);border-radius:8px;padding:10px 12px;font:inherit;font-size:14px;margin-bottom:12px}
  .tb-reflist{overflow:auto;flex:1;-webkit-overflow-scrolling:touch}
  .tb-refgroup{margin-bottom:16px}
  .tb-refgroup h4{font-size:11px;letter-spacing:.09em;text-transform:uppercase;color:var(--teal);font-weight:700;margin:0 0 8px}
  .tb-refitem{border:1px solid var(--line);border-radius:9px;padding:10px 12px;margin-bottom:8px;background:var(--card)}
  .tb-refn{font-weight:700;font-size:13px;color:var(--ink);margin-bottom:3px}
  .tb-reff{font-family:"IBM Plex Mono","Work Sans",monospace;font-size:13px;color:var(--ink);line-height:1.5}
  .tb-refnote2{font-size:12px;color:var(--muted);margin-top:4px;line-height:1.45}
  .tb-refnote{font-size:11.5px;color:var(--muted);line-height:1.45;margin:10px 0 0}
  .tb-refempty{font-size:13px;color:var(--muted)}
  .tb-calcw{position:fixed;right:22px;bottom:22px;width:260px;background:var(--paper);border:1px solid var(--line);border-radius:12px;box-shadow:0 20px 50px -20px rgba(0,0,0,.6);z-index:61;padding:12px}
  .tb-calc-head{display:flex;align-items:center;justify-content:space-between;font-weight:700;font-size:13px;color:var(--ink);margin-bottom:8px}
  .tb-calc-disp{background:var(--tint);border:1px solid var(--line);border-radius:8px;padding:10px 12px;text-align:right;font-family:"IBM Plex Mono","Work Sans",monospace;font-size:18px;color:var(--ink);min-height:42px;overflow:auto;white-space:nowrap;margin-bottom:8px}
  .tb-calc-keys{display:grid;grid-template-columns:repeat(4,1fr);gap:6px}
  .tb-ck{border:1px solid var(--line);background:var(--card);color:var(--ink);border-radius:8px;padding:11px 0;font:inherit;font-size:15px;font-weight:600;cursor:pointer}
  .tb-ck:hover{border-color:var(--teal)} .tb-ck.eq{background:var(--teal);color:#fff;border-color:transparent} .tb-ck.clr{color:#c0453f}
  /* Tables drawer: wider than the standard drawer to hold a data grid */
  .tb-tables-drawer{width:640px;max-width:96vw}
  .tb-tbl-chiprow{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:14px;flex-shrink:0}
  .tb-tbl-chip{border:1px solid var(--line);background:var(--card);color:var(--muted);border-radius:999px;padding:6px 12px;font:inherit;font-size:12px;cursor:pointer;white-space:nowrap}
  .tb-tbl-chip:hover{border-color:var(--teal);color:var(--ink)}
  .tb-tbl-chip.active{background:var(--tint);color:var(--teal);border-color:var(--teal);font-weight:700}
  .tb-tbl-body{flex:1;overflow-y:auto;-webkit-overflow-scrolling:touch;display:flex;flex-direction:column;min-height:0}
  .tb-tbl-formula{font-family:"IBM Plex Mono","Work Sans",monospace;font-size:12px;color:var(--muted);margin-bottom:10px}
  .tb-tbl-lookupbar{display:flex;flex-wrap:wrap;align-items:flex-end;gap:10px;padding:12px;background:var(--card);border:1px solid var(--line);border-radius:9px;margin-bottom:12px}
  .tb-tbl-field{display:flex;flex-direction:column;gap:4px}
  .tb-tbl-field label{font-size:11px;color:var(--muted)}
  .tb-tbl-field input,.tb-tbl-field select{border:1px solid var(--line);background:var(--paper);color:var(--ink);border-radius:7px;padding:7px 9px;font:inherit;font-size:13.5px;width:100px}
  .tb-tbl-find{border:none;background:var(--teal);color:#fff;border-radius:7px;padding:8px 16px;font:inherit;font-weight:700;font-size:13px;cursor:pointer}
  .tb-tbl-find:hover{opacity:.92}
  .tb-tbl-result{font-size:13px;font-weight:600;color:var(--ink);margin-left:auto;align-self:center}
  .tb-tbl-tablewrap{overflow:auto;border:1px solid var(--line);border-radius:9px;flex:1;min-height:180px;max-height:min(52vh,420px)}
  .tb-tbl-table{border-collapse:collapse;width:100%;font-size:12.5px}
  .tb-tbl-table th,.tb-tbl-table td{padding:6px 10px;text-align:center;white-space:nowrap;border-bottom:1px solid var(--line)}
  .tb-tbl-table thead th{position:sticky;top:0;background:var(--card);color:var(--ink);font-weight:700;z-index:2}
  .tb-tbl-table tbody th{position:sticky;left:0;background:var(--card);z-index:1;font-weight:700}
  .tb-tbl-table .tbl-corner{position:sticky;left:0;top:0;z-index:3;background:var(--card)}
  .tb-tbl-table tbody tr:nth-child(even){background:var(--tint)}
  .tb-tbl-table .tbl-hit-row th{background:var(--teal);color:#fff}
  .tb-tbl-table .tbl-hit{background:var(--teal);color:#fff;font-weight:800;box-shadow:inset 0 0 0 2px var(--ink)}
  .tb-tbl-loading,.tb-tbl-error{font-size:13px;color:var(--muted);padding:20px 0;text-align:center}
  .tb-tbl-error{color:#c0453f}
  @media(max-width:860px){
    .tb-drawer{width:100%;max-width:100vw}
    .tb-tables-drawer{width:100%}
    .tb-calcw{left:12px;right:12px;width:auto;bottom:12px}
    .tb-tbl-lookupbar{flex-direction:column;align-items:stretch}
    .tb-tbl-result{margin-left:0}
  }
  @media(max-width:860px){
    .tb-shell{grid-template-columns:minmax(0,1fr)}
    .tb-rail{order:-1;min-width:0;max-width:100%}
    .tb-railhead{display:flex;margin-bottom:10px}
    .tb-groups{display:flex;gap:8px;min-width:0;max-width:100%;overflow-x:auto;padding-bottom:8px;-webkit-overflow-scrolling:touch}
    .tb-group{display:contents} .tb-group .gl{display:none}
    .tb-tile{width:auto;flex:0 0 auto;grid-template-columns:auto auto;align-items:center;gap:9px;padding:9px 12px;margin-bottom:0}
    .tb-tile .tb-badge{width:32px;height:32px;font-size:10px;align-self:center}
    .tb-tile .tb-tm,.tb-tile .tb-tag{display:none}
    .tb-tinfo{gap:0} .tb-tn{white-space:nowrap;font-size:13px}
  }
/* Answer review */
html:has(#tb-feedback-loop){scroll-behavior:auto}
#tb-feedback-loop .btn{transform:none;transition:background-color .12s,border-color .12s,box-shadow .12s}
#tb-feedback-loop button,#tb-feedback-loop input,#tb-feedback-loop select{min-width:0;max-width:100%}
#tb-feedback-loop button{white-space:normal;overflow-wrap:anywhere}
#tb-feedback-loop .tb-review-list{grid-template-columns:minmax(0,1fr)}
#tb-feedback-loop .tb-review-card{width:100%;overflow-wrap:anywhere}
#tb-feedback-loop .tb-review-card> *{min-width:0;max-width:100%}
#tb-feedback-loop{--review-revealed:#1d4ed8;--review-good:#14734f;--review-bad:#a3332f;--review-warn:#8b5c0c;--review-neutral:#475569;--review-current:#344054;margin:0 0 26px;padding:20px;border:1px solid var(--teal,#087f8c);border-radius:12px;background:linear-gradient(180deg,color-mix(in srgb,var(--teal,#087f8c) 7%,var(--card,#fff)),var(--card,#fff));color:var(--ink,#172b3a)}
#tb-feedback-loop [hidden]{display:none!important}#tb-feedback-loop *{box-sizing:border-box}#tb-feedback-loop h2,#tb-feedback-loop h3{font-family:"Source Serif 4",serif;line-height:1.3;margin:3px 0 10px}#tb-feedback-loop h2{font-size:23px}#tb-feedback-loop h3{font-size:21px}#tb-feedback-loop p{line-height:1.6}#tb-feedback-loop button{cursor:pointer}#tb-feedback-loop button:disabled{cursor:default;opacity:.6}#tb-feedback-loop button:focus-visible,#tb-feedback-loop a:focus-visible{outline:3px solid var(--teal,#087f8c);outline-offset:3px}#tb-feedback-loop article,#tb-feedback-loop h3{scroll-margin-top:110px}
.tb-feedback-head,.tb-review-card-head,.tb-retry-head{display:flex;align-items:flex-start;justify-content:space-between;gap:18px}.tb-feedback-head p{max-width:68ch;color:var(--muted,#526575);font-size:14px}.tb-feedback-stats{display:flex;gap:8px;flex-wrap:wrap}.tb-feedback-stats>span{min-width:82px;padding:9px;border:1px solid var(--line,#d9e1e7);border-radius:9px;text-align:center;font-size:12px;background:var(--card,#fff)}.tb-feedback-stats strong{display:block;font-size:21px}
.tb-feedback-actions,.tb-retry-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}.tb-review-session-note{font-size:12px;color:var(--muted,#526575)}.tb-answer-review,.tb-retry-panel{margin-top:20px;padding-top:20px;border-top:1px solid var(--line,#d9e1e7)}.tb-review-tabs{display:flex;flex-wrap:wrap;gap:6px;margin:12px 0}.tb-review-tabs button{padding:8px 12px;border:1px solid var(--line,#d9e1e7);border-radius:999px;background:var(--card,#fff);color:var(--ink,#172b3a);font:inherit;font-size:12px}.tb-review-tabs button.on{background:var(--teal,#087f8c);color:#fff}.tb-review-tabs span{margin-left:4px}
.tb-review-grid{display:flex;flex-wrap:wrap;gap:6px}.tb-review-navcell{position:relative;display:grid;place-items:center;width:44px;min-height:48px;padding:3px;border:1px solid currentColor;border-radius:8px;background:var(--card,#fff);font:inherit;font-size:12px}.tb-review-navcell.revealed{color:var(--review-revealed);background:color-mix(in srgb,var(--review-revealed) 10%,var(--card,#fff))}.tb-review-card.revealed{border-color:var(--review-revealed)}.tb-review-status.revealed{color:var(--review-revealed)}.tb-review-navcell.correct{color:var(--review-good);background:color-mix(in srgb,var(--review-good) 10%,var(--card,#fff))}.tb-review-navcell.incorrect{color:var(--review-bad);background:color-mix(in srgb,var(--review-bad) 10%,var(--card,#fff))}.tb-review-navcell.unanswered{color:var(--review-neutral);background:color-mix(in srgb,var(--review-neutral) 7%,var(--card,#fff))}.tb-review-navcell.unavailable{color:var(--review-warn)}.tb-review-navcell.cur{outline:3px solid var(--review-current);outline-offset:2px}.tb-rnc-flag{position:absolute;right:-4px;top:-7px;color:var(--review-warn);background:var(--card,#fff);border-radius:4px;padding:0 3px;font-size:16px;line-height:20px}.tb-review-gridkey{font-size:12px;color:var(--muted,#526575)}
.tb-review-list{display:grid;gap:15px}.tb-review-card{min-width:0;border:1px solid var(--line,#d9e1e7);border-radius:12px;background:var(--card,#fff);padding:18px}.tb-review-card-head{margin-bottom:14px}.tb-review-topic{font-size:12px;color:var(--muted,#526575);margin-top:4px}.tb-review-badges{display:flex;flex-wrap:wrap;gap:6px}.tb-review-status,.tb-review-setbadge{border-radius:999px;padding:5px 9px;font-size:11px;font-weight:700;background:var(--tint,#f2f6f8)}.tb-review-status.correct{color:var(--review-good)}.tb-review-status.incorrect{color:var(--review-bad)}.tb-review-status.unanswered{color:var(--review-neutral)}.tb-review-status.flagged,.tb-review-status.unavailable{color:var(--review-warn)}.tb-review-stem{font-size:16px;font-weight:600;line-height:1.6;margin-bottom:14px}
.tb-review-options,.tb-retry-options{display:grid;gap:8px;margin-top:12px}.tb-review-option{display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:10px;padding:11px;border:1px solid var(--line,#d9e1e7);border-radius:9px;font-size:14px}.tb-review-option.is-correct,.tb-retry-option.correct{border-color:var(--review-good);background:color-mix(in srgb,#1f9d6b 10%,var(--card,#fff))}.tb-review-option.is-wrong,.tb-retry-option.wrong{border-color:var(--review-bad);background:color-mix(in srgb,#c0453f 9%,var(--card,#fff))}.tb-answer-letter{display:grid;place-items:center;min-width:26px;min-height:26px;border:1px solid var(--line,#d9e1e7);border-radius:6px;font-weight:700}.tb-answer-tags{display:flex;flex-wrap:wrap;gap:4px}.tb-answer-tag{padding:3px 6px;border:1px solid var(--line,#d9e1e7);border-radius:999px;font-size:10px}
.tb-answer-compare{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:12px 0}.tb-answer-compare>div{min-width:0;padding:11px;border:1px solid var(--line,#d9e1e7);border-radius:9px}.tb-answer-compare span{display:block;text-transform:uppercase;font-size:11px;color:var(--muted,#526575);margin-bottom:4px}.tb-answer-compare strong{font-size:14px}.tb-explanation{margin:12px 0;padding:14px;border-left:3px solid var(--teal,#087f8c);border-radius:7px;background:var(--tint,#f2f6f8);font-size:14px;line-height:1.65}.tb-explanation-title{font-weight:700;margin-bottom:6px}.tb-review-rationales{margin-top:10px}.tb-review-rationales summary{cursor:pointer;font-weight:600}.tb-review-lesson{color:var(--teal,#087f8c);font-size:13px;font-weight:600}.tb-review-newtab{font-size:11px;font-weight:400}.tb-review-empty{padding:20px;border:1px dashed var(--line,#d9e1e7);border-radius:9px}
.tb-retry-option{display:flex;align-items:flex-start;gap:10px;width:100%;padding:12px;border:1px solid var(--line,#d9e1e7);border-radius:9px;background:var(--card,#fff);color:var(--ink,#172b3a);font:inherit;text-align:left}.tb-retry-option.selected{outline:2px solid var(--teal,#087f8c);outline-offset:1px}.tb-retry-feedback{margin-top:14px;padding:12px;border-radius:8px;border:1px solid currentColor}.tb-retry-feedback.correct{color:var(--review-good)}.tb-retry-feedback.wrong{color:var(--review-bad)}#tb-feedback-loop .tb-answer-copy,#tb-feedback-loop strong,#tb-feedback-loop a,#tb-feedback-loop .tb-explanation,#tb-feedback-loop .tb-retry-option{overflow-wrap:anywhere;min-width:0}#tb-feedback-loop svg{max-width:100%}
/* Solid status fills keep their saturated identity in both themes. */
.tb-review-navcell.correct,.tb-review-status.correct{background:#15803d;color:#fff;border-color:var(--review-good)}
.tb-review-navcell.incorrect,.tb-review-status.incorrect{background:#dc2626;color:#fff;border-color:var(--review-bad)}
.tb-review-navcell.revealed,.tb-review-status.revealed{background:#1d4ed8;color:#fff;border-color:var(--review-revealed)}
.tb-rnc-flag,.tb-review-status.flagged{background:#ff9500;color:#172b3a;font-weight:800;border:2px solid var(--card,#fff)}
.tb-rnc-flag{padding:0 4px;border-radius:5px;font-size:18px;line-height:22px}
.tb-review-grid{gap:10px}
.tb-review-gridkey{color:var(--ink,#172b3a);font-size:13px;font-weight:500}
html[data-theme="dark"] #tb-feedback-loop{--review-revealed:#93c5fd;--review-good:#6ee7b7;--review-bad:#fca5a5;--review-warn:#f0c36a;--review-neutral:#cbd5e1;--review-current:#f8fafc}
@media(max-width:760px){#tb-feedback-loop{padding:15px}.tb-feedback-head,.tb-review-card-head{flex-direction:column}.tb-answer-compare{grid-template-columns:1fr}.tb-review-option{grid-template-columns:auto minmax(0,1fr)}.tb-answer-tags{grid-column:1/-1}.tb-review-card{padding:14px}.tb-feedback-actions>button{flex:1 1 180px}}
/* Contextual formula pane */
.tb-fcontextbar{display:flex;flex-wrap:wrap;gap:6px;margin:0 0 13px}.tb-fcontextbar span{display:inline-flex;padding:4px 8px;border:1px solid var(--line);border-radius:999px;background:var(--tint);color:var(--muted);font-size:10.5px;font-weight:700}.tb-currentgroup{padding:12px;border:1px solid color-mix(in srgb,var(--teal) 55%,var(--line));border-radius:10px;background:color-mix(in srgb,var(--teal) 7%,var(--paper));margin-bottom:18px}.tb-fcard{padding:12px}.tb-fcard.is-current{border-color:var(--teal);box-shadow:0 0 0 2px color-mix(in srgb,var(--teal) 14%,transparent)}.tb-fhead{display:flex;align-items:flex-start;justify-content:space-between;gap:10px}.tb-fbadge{flex:none;border-radius:999px;padding:3px 7px;background:var(--teal);color:#fff;font-size:9.5px;font-weight:700;letter-spacing:.04em;text-transform:uppercase}.tb-fqmap{margin:8px 0 0;padding:7px 8px;border-radius:7px;background:var(--tint);color:var(--muted);font-size:11.5px;line-height:1.4}.tb-fqmap.current{background:color-mix(in srgb,var(--teal) 12%,var(--card));color:var(--ink)}.tb-fqmap.muted{font-style:italic}.tb-fcaution{margin-top:7px;padding:7px 8px;border-left:3px solid var(--amber,#b8791b);background:color-mix(in srgb,var(--amber,#b8791b) 8%,var(--card));color:var(--muted);font-size:11.5px;line-height:1.45}.tb-reff.tb-fmath{font-family:inherit;line-height:1.35;overflow-x:auto;overflow-y:hidden;max-width:100%}.tb-fmath mjx-container{color:var(--ink);font-size:108%}.tb-fmath mjx-container[display="true"]{display:block;margin:.2em 0;text-align:left;max-width:100%;overflow-x:auto;overflow-y:hidden}.tb-fconcept{display:grid;gap:5px;padding:12px;border:1px solid var(--line);border-radius:9px;background:var(--card);color:var(--ink);font-size:12.5px;line-height:1.5}.tb-fconcept span{color:var(--muted)}.tb-refnote2 strong,.tb-fcaution strong,.tb-fqmap strong{color:var(--ink)}@media(max-width:520px){.tb-currentgroup{padding:9px}.tb-fhead{display:block}.tb-fbadge{display:inline-flex;margin:4px 0 2px}}