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var(--brand)}.sec-title{font-size:17px;font-weight:600;margin:0;line-height:1.3;display:flex;align-items:center;gap:8px;flex-wrap:wrap}.sec-aside{font-weight:400;font-size:13px}.sec-desc{margin:4px 0 0;font-size:13.5px;line-height:1.5;color:var(--dim);max-width:64ch}.unit-tag{display:inline-block;margin-left:8px;font-family:var(--font-mono),monospace;font-size:10px;letter-spacing:.06em;text-transform:uppercase;padding:2px 6px;border:1px solid var(--line);vertical-align:middle;color:var(--dim)}.unit-tag.free{color:var(--green);border-color:color-mix(in srgb,var(--green) 50%,var(--line))}.sheet-facts{display:grid;grid-template-columns:max-content 1fr;grid-gap:6px 14px;gap:6px 14px;margin:14px 0 0;font-size:14px;line-height:1.5}.sheet-facts dt{font-family:var(--font-mono),monospace;font-size:11px;letter-spacing:.06em;text-transform:uppercase;color:var(--dim);padding-top:3px}.sheet-facts dd{margin:0}@media (max-width:560px){.sheet-facts{grid-template-columns:1fr;gap:2px}.sheet-facts dd{margin-bottom:6px}}.ch-stripe-frame{overflow:hidden;box-shadow:0 1px 3px rgba(0,0,0,.28),0 10px 30px rgba(0,0,0,.18)}.ch-stripe-frame,.ch-stripe-frame iframe{border-radius:14px}.ngn-matrix-grid{display:grid;grid-gap:6px;gap:6px;align-items:stretch}.ngn-matrix-corner{display:block}.ngn-matrix-head{font-size:13px;line-height:1.3;overflow-wrap:break-word;min-width:0;color:var(--brand);font-weight:600;text-align:center;padding:4px 6px;align-self:end}.ngn-matrix-row{display:contents}.ngn-matrix-label{font-size:14.5px;line-height:1.45;padding:12px 10px 12px 0;border-top:1px solid var(--line)}.ngn-cell,.ngn-matrix-label{display:flex;align-items:center}.ngn-cell{border:1.5px solid var(--line);border-radius:10px;background:var(--card);cursor:pointer;padding:12px 8px;min-height:48px;justify-content:center;gap:8px;font:inherit;font-size:14px;color:var(--dim);transition:background .12s,border-color .12s,color .12s}.ngn-cell:hover:not(:disabled){border-color:var(--brand);color:var(--ink)}.ngn-cell:focus-visible{outline:2px solid var(--brand);outline-offset:2px}.ngn-cell:disabled{cursor:default;opacity:.75}.ngn-cell.on{border-color:var(--brand);background:var(--brand);color:var(--paper);font-weight:600}:root[data-theme=dark] .ngn-cell.on{color:#0A1830}@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .ngn-cell.on{color:#0A1830}}.ngn-dot{width:14px;height:14px;border-radius:50%;border:2px solid;flex:0 0 auto;position:relative}.ngn-cell.on .ngn-dot:after{content:"";position:absolute;inset:2px;border-radius:50%;background:currentColor}.ngn-cell-text{display:none}@media (max-width:700px){.ngn-matrix-grid{display:block}.ngn-matrix-corner,.ngn-matrix-head{display:none}.ngn-matrix-row{display:block;border:1px solid var(--line);border-radius:12px;padding:12px;margin-bottom:10px}.ngn-matrix-label{border-top:0;padding:0 0 10px;font-weight:500}.ngn-cell{width:100%;justify-content:flex-start;margin-top:6px}.ngn-cell-text{display:inline}}.ngn-instruction{font-size:13.5px;margin:0 0 12px}.ngn-box{width:15px;height:15px;border-radius:4px;border:2px solid;flex:0 0 auto;position:relative}.ngn-cell.on .ngn-box:after,.ngn-choice.on .ngn-box:after{content:"";position:absolute;inset:2px;border-radius:1px;background:currentColor}.ngn-choices{display:grid;grid-gap:8px;gap:8px}.ngn-choice{display:flex;align-items:center;gap:10px;text-align:left;border:1.5px solid var(--line);border-radius:10px;background:var(--card);padding:13px 14px;min-height:48px;font:inherit;font-size:15px;color:var(--ink);cursor:pointer;transition:border-color .12s,background .12s}.ngn-choice:hover:not(:disabled){border-color:var(--brand)}.ngn-choice:focus-visible{outline:2px solid var(--brand);outline-offset:2px}.ngn-choice:disabled{opacity:.5;cursor:default}.ngn-choice.on{border-color:var(--brand);background:var(--wash)}.ngn-choice.ngn-right:disabled,.ngn-choice.on:disabled{opacity:1}.ngn-choice:disabled:not(.on):not(.ngn-right){opacity:.75}.ngn-slots{margin:0 0 4px}.ngn-slots-label{margin:0 0 8px}.ngn-slot-row{display:grid;grid-gap:8px;gap:8px;margin-bottom:10px}.ngn-slot{min-height:52px;border-radius:10px;padding:12px;font:inherit;font-size:14.5px;border:2px solid var(--brand);background:var(--wash);color:var(--ink);cursor:pointer;text-align:center}.ngn-slot.empty{border-style:dashed;border-color:var(--line);background:transparent;min-height:44px}.ngn-slot.target{border-color:var(--brand);background:var(--wash)}.ngn-slot:focus-visible{outline:2px solid var(--brand);outline-offset:2px}.ngn-slot-hint{color:var(--dim);font-size:13px;margin:-4px 0 8px}.ngn-bank{display:flex;flex-wrap:wrap;gap:8px}.ngn-bank-item{border:1.5px solid var(--line);border-radius:999px;background:var(--card);padding:10px 15px;min-height:44px;font:inherit;font-size:14px;color:var(--ink);cursor:-webkit-grab;cursor:grab}.ngn-bank-item:hover:not(:disabled){border-color:var(--brand)}.ngn-bank-item:focus-visible{outline:2px solid var(--brand);outline-offset:2px}.ngn-bank-item.armed{border-color:var(--brand);background:var(--brand);color:var(--paper);font-weight:600}:root[data-theme=dark] .ngn-bank-item.armed{color:#0A1830}@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .ngn-bank-item.armed{color:#0A1830}}.ngn-bank-item.taken{opacity:.35;cursor:default;text-decoration:line-through}.ngn-bowtie{display:grid;grid-gap:18px;gap:18px;grid-template-columns:1fr}@media (min-width:860px){.ngn-bowtie{grid-template-columns:1fr 1fr 1fr;align-items:start;gap:22px}.ngn-bowtie-knot{align-self:start}}.ngn-cloze{line-height:2.4}.ngn-cloze,.ngn-passage{font-size:15.5px;margin:0 0 16px}.ngn-passage{line-height:1.9}.ngn-inline-slot{display:inline;padding:2px 3px;border-radius:3px;border:0;border-bottom:2px solid var(--brand);background:color-mix(in srgb,var(--brand) 16%,transparent)}.ngn-inline-slot.empty{border:1.5px dashed var(--line);border-radius:8px;background:transparent;display:inline-block;min-width:7em;vertical-align:baseline}.ngn-blank-missing{color:#c0392b;font-weight:700}.ngn-token{display:inline;font:inherit;font-size:inherit;border:0;background:transparent;color:inherit;padding:1px 0;border-radius:3px;cursor:pointer;text-align:left;border-bottom:1.5px solid color-mix(in srgb,var(--brand) 45%,transparent);transition:background .1s ease,border-color .1s ease;box-decoration-break:clone;-webkit-box-decoration-break:clone}.ngn-token:hover:not([aria-disabled=true]){background:color-mix(in srgb,var(--brand) 14%,transparent);border-bottom-color:var(--brand)}.ngn-token:focus-visible{outline:2px solid var(--brand);outline-offset:1px}.ngn-token[aria-disabled=true]{cursor:default}.ngn-token.on{background:color-mix(in srgb,var(--brand) 34%,transparent);border-bottom-color:var(--brand);padding:1px 0;margin:0;box-shadow:-2px 0 0 color-mix(in srgb,var(--brand) 34%,transparent),2px 0 0 color-mix(in srgb,var(--brand) 34%,transparent)}.ngn-table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch}.ngn-table{border-collapse:collapse;width:100%;min-width:420px;font-size:14.5px}.ngn-table td,.ngn-table th{border:1px solid var(--line);padding:9px 11px;text-align:left}.ngn-table thead th{font-size:12px;letter-spacing:.06em;text-transform:uppercase;color:var(--brand);font-weight:600}.ngn-row-head{font-weight:500}.ngn-group-row{border-top:1px solid var(--line);padding:12px 0}.ngn-group-opts{display:flex;flex-wrap:wrap;gap:8px;margin-top:8px}.ngn-group-opts .ngn-cell{flex:1 1 auto;min-width:8rem}.ngn-group-opts .ngn-cell-text{display:inline}.ngn-nav{display:flex;flex-wrap:wrap;gap:6px}.ngn-nav-dot{min-width:34px;height:34px;border-radius:8px;border:1px solid var(--line);background:transparent;color:var(--dim);font:inherit;font-size:13px;cursor:pointer}.ngn-nav-dot.done{border-color:var(--brand);color:var(--ink)}.ngn-nav-dot.cur{background:var(--brand);color:var(--paper);border-color:var(--brand);font-weight:700}:root[data-theme=dark] .ngn-nav-dot.cur{color:#0A1830}@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .ngn-nav-dot.cur{color:#0A1830}}.ngn-case{display:grid;grid-gap:20px;gap:20px;grid-template-columns:1fr;align-items:start}@media (min-width:980px){.ngn-case{grid-template-columns:minmax(280px,380px) 1fr;gap:26px}.ngn-chart{position:-webkit-sticky;position:sticky;top:16px;max-height:calc(100vh - 32px)}.ngn-chart,.ngn-chart-body{display:flex;flex-direction:column}.ngn-chart-body{overflow:hidden;min-height:0}.ngn-chart-pane{overflow-y:auto}}.ngn-chart{border:1px solid var(--line);border-radius:12px;padding:14px;background:var(--card)}.ngn-chart-bar{display:flex;align-items:center;justify-content:space-between;gap:10px}.ngn-chart-toggle{border:1px solid var(--line);border-radius:8px;background:transparent;color:var(--dim);font:inherit;font-size:12px;padding:5px 10px;cursor:pointer;min-height:32px}.ngn-chart-toggle:hover{border-color:var(--brand);color:var(--ink)}@media (min-width:980px){.ngn-chart-toggle{display:none}}.ngn-chart-body.hidden{display:none}.ngn-chart-tabs{display:flex;flex-wrap:wrap;gap:4px;margin:12px 0 10px}.ngn-chart-tab{border:1px solid var(--line);border-radius:999px;background:transparent;font:inherit;font-size:12px;padding:7px 11px;color:var(--dim);cursor:pointer;min-height:36px}.ngn-chart-tab:hover{border-color:var(--brand);color:var(--ink)}.ngn-chart-tab:focus-visible{outline:2px solid var(--brand);outline-offset:2px}.ngn-chart-tab.on{background:var(--brand);border-color:var(--brand);color:var(--paper);font-weight:600}:root[data-theme=dark] .ngn-chart-tab.on{color:#0A1830}@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .ngn-chart-tab.on{color:#0A1830}}.ngn-chart-entry{border-top:1px solid var(--line);padding-top:10px;margin-top:10px}.ngn-chart-entry:first-child{border-top:0;padding-top:0;margin-top:0}.ngn-chart-time{font-size:11.5px;color:var(--brand);margin:0 0 4px}.ngn-chart-para{font-size:13.5px;line-height:1.65;margin:0 0 8px;white-space:pre-wrap}.ngn-chart-para:last-child{margin-bottom:0}.ngn-case-stem{font-size:15.5px;line-height:1.7;margin:14px 0 18px}.ngn-case-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:22px;padding-top:16px;border-top:1px solid var(--line)}.ngn-case-foot-sticky{position:-webkit-sticky;position:sticky;bottom:0;z-index:5;background:var(--paper);padding-bottom:12px}@media (max-width:680px){.ngn-case-foot-sticky{bottom:calc(56px + env(safe-area-inset-bottom))}}.ngn-case-result{padding:24px}.ngn-case-score{margin:8px 0 14px;font-size:30px;font-weight:700;line-height:1.1}.ngn-step-chips{display:flex;flex-wrap:wrap;gap:8px}.ngn-step-chip{display:inline-flex;gap:8px;align-items:baseline;font-size:13px;padding:6px 10px;border:1.5px solid var(--line);border-radius:999px;color:var(--dim)}.ngn-step-chip b{color:var(--ink);font-weight:600}.ngn-step-chip.full{border-color:var(--brand)}.ngn-exam-bar{display:flex;align-items:baseline;justify-content:space-between;gap:12px;flex-wrap:wrap;padding-bottom:12px;border-bottom:1px solid var(--line);margin-bottom:22px;margin-top:18px}.ngn-bar-row{display:grid;grid-template-columns:minmax(9rem,15rem) 1fr 4rem;grid-gap:12px;gap:12px;align-items:center;padding:7px 0}.ngn-bar-label{font-size:14.5px}.ngn-bar-track{height:10px;background:var(--line);overflow:hidden}.ngn-bar-fill,.ngn-bar-track{border-radius:999px;display:block}.ngn-bar-fill{height:100%;background:var(--brand)}.ngn-bar-value{font-size:13.5px;text-align:right;font-weight:600}@media (max-width:560px){.ngn-bar-row{grid-template-columns:1fr 3.5rem}.ngn-bar-track{grid-column:1/-1}}.ngn-focus-grid{display:grid;grid-gap:8px;gap:8px;grid-template-columns:1fr}@media (min-width:620px){.ngn-focus-grid{grid-template-columns:1fr 1fr}}.ngn-focus{display:flex;align-items:center;justify-content:space-between;gap:12px;border:1.5px solid var(--line);border-radius:10px;background:var(--card);padding:14px 16px;min-height:52px;font:inherit;font-size:15px;color:var(--ink);cursor:pointer;text-align:left}.ngn-focus:hover:not(:disabled){border-color:var(--brand)}.ngn-focus:focus-visible{outline:2px solid var(--brand);outline-offset:2px}.ngn-focus:disabled{opacity:.45;cursor:default}.ngn-blank-group{margin-top:16px}.ngn-blank-group+.ngn-blank-group{margin-top:18px}.ngn-inline-slot.long{text-align:left}.ngn-focus.on{border-color:var(--brand);background:var(--wash)}.ngn-next-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}.ngn-date{font:inherit;padding:9px 12px;border-radius:8px;border:1px solid var(--line);background:var(--paper);color:var(--ink)}.ngn-cov{display:flex;flex-direction:column;gap:7px;margin-bottom:4px}.ngn-cov-row{display:grid;grid-template-columns:minmax(0,1fr) 96px 52px;grid-gap:10px;gap:10px;align-items:center;font-size:14px}.ngn-cov-bar{display:block;height:7px;border-radius:999px;background:var(--line);overflow:hidden}.ngn-cov-bar>span{display:block;height:100%;background:var(--brand)}.ngn-cov-row .mono{text-align:right;font-size:12px}@media (max-width:560px){.ngn-cov-row{grid-template-columns:minmax(0,1fr) 60px 48px}}.ngn-case-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));grid-gap:12px;gap:12px}.ngn-case-card{display:flex;flex-direction:column;gap:6px;padding:16px 18px;border:1px solid var(--line);border-radius:12px;text-decoration:none;color:inherit;background:var(--card);transition:border-color .12s ease}.ngn-case-card:hover{border-color:var(--brand)}.ngn-case-next{display:flex;flex-direction:column;gap:6px;text-decoration:none;color:inherit;margin:0 0 22px}.ngn-case-next:hover{background:var(--wash)}.ngn-chips{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 18px}.ngn-chip{font-size:13px;padding:6px 12px;border:1.5px solid var(--line);border-radius:999px;text-decoration:none;color:var(--dim)}.ngn-chip:hover{border-color:var(--brand);color:var(--ink)}.ngn-chip.on{border-color:var(--brand);color:var(--brand);font-weight:600}.ngn-case-group{border-top:1.5px solid var(--line)}.ngn-case-group summary{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:14px 2px;cursor:pointer;font-weight:600;font-size:16px;list-style:none}.ngn-case-group summary::-webkit-details-marker{display:none}.ngn-case-group summary:before{content:"▸";color:var(--brand);margin-right:8px;transition:transform .12s;display:inline-block}.ngn-case-group[open] summary:before{transform:rotate(90deg)}.ngn-case-group summary>span:first-child{flex:1 1}.ngn-case-group .ngn-case-list{padding:0 0 18px}.ngn-case-title{font-weight:650;font-size:15.5px;line-height:1.35}.ngn-count{font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.ngn-home-grid{display:grid;grid-gap:12px;gap:12px;grid-template-columns:1fr;margin-top:18px}@media (min-width:620px){.ngn-home-grid{grid-template-columns:1fr 1fr}}.ngn-home-card{display:flex;flex-direction:column;gap:7px;padding:20px;border:1.5px solid var(--line);border-radius:var(--radius);background:var(--card);text-decoration:none;color:inherit;transition:border-color .12s}.ngn-home-card:hover{border-color:var(--brand)}.ngn-home-h{font-weight:650;font-size:17px;line-height:1.3}.ngn-home-card .dim{font-size:14.5px;line-height:1.6}.ngn-right{border-color:var(--brand)!important}.ngn-right.on{background:var(--wash)!important;color:var(--brand)!important;font-weight:600}.ngn-right:not(.on){background:color-mix(in srgb,var(--brand) 10%,var(--card))!important}.ngn-wrong{border-color:var(--red)!important;background:var(--red-wash)!important;color:var(--ink)!important}.ngn-token.ngn-right{border-bottom-color:var(--brand);border-bottom-width:2px}
/* !important because the generic .ngn-right.on / :not(.on) rules above are
   !important, and a plain declaration here loses to them however specific the
   selector — which is why the earlier "missed token" tint never actually
   rendered. The same translucent-marker treatment as .ngn-token.on: deeper for
   the one you picked, quieter for the one you missed, ink kept both ways. */.ngn-token.ngn-right.on{background:color-mix(in srgb,var(--brand) 46%,transparent)!important;color:var(--ink)!important;font-weight:inherit}.ngn-token.ngn-right:not(.on){background:color-mix(in srgb,var(--brand) 16%,transparent)!important}.ngn-token.ngn-wrong{border-bottom-color:var(--red);background:var(--red-wash)!important;color:var(--ink)!important}.ngn-answers{display:grid;grid-gap:8px;gap:8px;margin-top:16px}.ngn-answer{margin:0;padding:12px 14px;border-radius:var(--radius);font-size:14.5px;line-height:1.6;border:1.5px solid var(--line);background:var(--card);display:grid;grid-gap:4px;gap:4px}.ngn-answer.ok{border-color:var(--brand);background:var(--wash)}.ngn-answer.ok,.ngn-answer.ok .lbl{color:var(--brand)}.ngn-answer.miss{border-color:var(--red);background:var(--red-wash)}.ngn-answer.miss 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