@font-face {
  font-family: Nunito;
  src: url('/assets/fonts/nunito-latin-wght-normal.woff2') format('woff2');
  font-weight: 200 1000;
  font-display: swap;
}
@font-face {
  font-family: Fredoka;
  src: url('/assets/fonts/fredoka-latin-wght-normal.woff2') format('woff2');
  font-weight: 300 700;
  font-display: swap;
}
:root {
  font-family: Nunito, ui-sans-serif, system-ui, sans-serif;
  font-synthesis: none;
  -webkit-font-smoothing: antialiased;
  line-height: 1.6;
  color: #30334b;
  background: #fcf9f2;
  --ink: #30334b;
  --muted: #6b6b80;
  --line: #e7e1ef;
  --purple: #7550be;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body { margin: 0; }
button, input { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button { cursor: pointer; }
button:disabled { cursor: default; }
a { color: inherit; text-underline-offset: 4px; }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { line-height: 1.2; }
button:focus-visible, a:focus-visible, summary:focus-visible { outline: 3px solid var(--purple); outline-offset: 4px; }
[tabindex="-1"]:focus { outline: none; }
.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; }
.skip-link { position: fixed; top: 8px; left: 8px; transform: translateY(-150%); padding: 10px 16px; background: white; z-index: 10; }
.skip-link:focus { transform: none; }

.topbar { border-bottom: 1px solid var(--line); background: #fff; }
.topbar-inner { width: min(100% - 48px, 1040px); margin: auto; min-height: 66px; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.brand { display: flex; align-items: center; gap: 9px; text-decoration: none; font: 600 25px Fredoka, sans-serif; letter-spacing: -.5px; }
.brand img { display: block; width: 35px; height: 39px; object-fit: contain; flex-shrink: 0; }
.brand sup { font: 750 9px Nunito, sans-serif; vertical-align: top; margin-left: 2px; }
.signin-link, .pricing-link { display: flex; align-items: center; gap: 10px; font-size: 13px; font-weight: 800; text-decoration: none; }
.signin-link:hover, .pricing-link:hover { color: var(--purple); }
.landing-account-links { display: flex; align-items: center; gap: clamp(12px, 2.5vw, 24px); }
.landing-account-links a { min-height: 44px; }
.wrap { width: min(100% - 40px, 760px); margin: auto; }
.hero { display: grid; gap: 18px; padding-top: 32px; }
.hero-copy { text-align: center; padding-bottom: 4px; }
.hero h1 { font: 450 40px/1.12 Fredoka, sans-serif; letter-spacing: -.9px; margin-bottom: 10px; text-wrap: balance; }
.hero h1 em { display: inline-block; font-style: normal; color: var(--purple); }
.hero-description { font-size: 16px; line-height: 1.6; color: var(--muted); max-width: 620px; margin: 0 auto; }
.hero-actions { display: flex; justify-content: center; flex-wrap: wrap; gap: 12px; margin-top: 18px; }
.hero-actions .button { font-size: 17px; }
.button.secondary { background: #fff; color: var(--purple); border: 1px solid #cbbce0; box-shadow: 0 3px 0 #e8deef; }
.button.secondary:hover { background: #f5effb; }
.sample-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 14px; margin-top: 20px; }
.sample-save-link { color: var(--purple); font-size: 16px; font-weight: 800; }
.sample-storage-note { color: var(--muted); font-size: 14px; margin: 14px 0 0; }
@media (max-width: 420px) { .hero-actions { flex-direction: column; } .sample-actions { align-items: stretch; flex-direction: column; } }

/* Show the payoff at a glance; detail is available on request. */
.progress-preview { border: 1px solid var(--line); border-radius: 20px; background: #f5f0fb; padding: 22px 24px 10px; }
.preview-intro { margin-bottom: 20px; }
.preview-intro p { font: 450 29px/1.2 Fredoka, sans-serif; margin: 8px 0 0; }
.preview-intro em { font-style: normal; color: var(--purple); }
.preview-overview { display: grid; grid-template-columns: minmax(0,2fr) minmax(0,1fr); align-items: start; gap: 18px; }
.preview-answer-stat, .preview-score-stat { display: flex; flex-direction: column; }
.preview-answer-stat { border-left: 1px solid #ddd1ea; padding-left: 12px; }
.preview-label { font-size: 16px; font-weight: 750; line-height: 1.4; }
.preview-example { display: inline-block; font-size: 14px; font-weight: 750; color: var(--muted); }
.preview-answer-count { display: flex; align-items: center; font: 450 46px/1.05 Fredoka, sans-serif; min-height: 82px; color: var(--purple); font-variant-numeric: tabular-nums; }
.preview-score-slot { min-height: 82px; display: flex; align-items: center; }
.preview-score-value { white-space: nowrap; font: 450 68px/1.15 Fredoka, sans-serif; color: var(--purple); font-variant-numeric: tabular-nums; }
.preview-score-value span { font-size: .65em; }
.preview-score-value.is-pending { white-space: normal; font: 650 16px/1.4 Nunito, sans-serif; color: var(--muted); }
.preview-demo { margin-top: 4px; }
.preview-stage { margin: 12px 0 0; min-height: 3em; color: var(--muted); font-size: 15px; line-height: 1.5; }
@media (max-width: 600px) { .preview-stage { min-height: 4.5em; } }
.preview-score-track { height: 9px; position: relative; background: #e6deef; border-radius: 20px; overflow: hidden; }
.preview-score-band { position: absolute; left: var(--range-start); width: var(--range-width); height: 100%; background: #9574cc; border-radius: inherit; }
.preview-actions { position: relative; margin-top: 5px; }
.preview-motion-control { position: absolute; top: 0; right: -5px; min-height: 44px; min-width: 90px; padding: 5px; display: flex; align-items: center; justify-content: flex-end; gap: 8px; border: 0; border-radius: 6px; background: transparent; color: var(--purple); font-size: 16px; font-weight: 750; }
.preview-motion-control:hover { background: #ede5f8; }
.preview-explanation > summary { display: flex; align-items: center; gap: 8px; width: fit-content; max-width: calc(100% - 100px); min-height: 44px; font-size: 16px; color: var(--muted); list-style: none; cursor: pointer; border-radius: 4px; }
.preview-explanation > summary::-webkit-details-marker { display: none; }
.preview-explanation > summary:hover { color: var(--purple); }
.preview-chevron { color: var(--muted); }
.preview-explanation[open] .preview-chevron { transform: rotate(180deg); }
.preview-details { border-top: 1px solid var(--line); padding: 17px 0 9px; }
.preview-details > p { font-size: 16px; line-height: 1.65; color: var(--muted); margin-bottom: 18px; }
.preview-diagnostic-story { display: grid; grid-template-columns: minmax(0,.8fr) minmax(0,1.2fr); gap: 22px; align-items: center; margin: 22px 0 12px; }
.preview-map-section { min-width: 0; }
.preview-map-layout { display: grid; grid-template-columns: minmax(0,1fr); gap: 3px; align-items: center; max-width: 240px; margin: 0 auto; }
.preview-map { display: block; width: 100%; height: auto; }
.preview-map-ring, .preview-map-spoke { fill: none; stroke: #ddd3ec; stroke-width: 1; }
.preview-map-spoke { opacity: .7; }
.preview-map-rim { fill: none; stroke: var(--subject); stroke-width: 3; stroke-linecap: round; opacity: .7; }
.preview-map-band { fill: var(--purple); opacity: .22; }
.preview-map-shape { fill: #7550be15; stroke: var(--purple); stroke-width: 1.8; stroke-linejoin: round; }
.preview-map-dot { fill: var(--purple); stroke: #f5f0fb; stroke-width: 1.2; }
.preview-map-highlight { fill: none; stroke: var(--subject); stroke-width: 1.4; opacity: 0; }
.preview-map-highlight.is-selected { opacity: 1; }
.has-topic-evidence .preview-map-rim.is-selected { stroke-width: 5; opacity: 1; }
.has-topic-evidence .preview-map-band.is-selected { fill: var(--subject); opacity: .3; }
.has-topic-evidence .preview-map-dot.is-selected { fill: var(--subject); }
.preview-map-legend { display: grid; grid-template-columns: 1fr 1fr; gap: 2px 7px; font-size: 14px; color: var(--muted); }
.preview-map-legend > span, .preview-map-legend > button { display: flex; align-items: center; gap: 7px; min-height: 40px; padding: 6px 5px; }
.preview-map-legend > button { font-size: inherit; color: inherit; text-align: left; background: transparent; border: 0; border-radius: 8px; }
.preview-map-legend > button:hover { background: #ebe2f4; }
.preview-map-legend i { width: 7px; height: 7px; background: var(--subject); border-radius: 50%; }
.preview-map-legend > .preview-selected-subject { font-weight: 850; color: var(--subject); background: #ffffffa8; }
.preview-topic-scenes { display: grid; min-width: 0; }
.preview-topic-detail { grid-area: 1 / 1; min-width: 0; display: flex; flex-direction: column; position: relative; padding: 16px; background: #ffffffed; border: 1px solid #e5dbea; border-radius: 15px; box-shadow: 0 5px 18px #65417505; opacity: 0; visibility: hidden; transform: translateX(8px); }
.preview-topic-detail.is-current { opacity: 1; visibility: visible; transform: none; }
.has-topic-evidence .preview-topic-detail { border-color: color-mix(in srgb, var(--subject) 30%, white); box-shadow: 0 5px 18px #6541750a; }
.preview-topic-heading { display: flex; gap: 7px; justify-content: space-between; align-items: center; }
.preview-topic-heading h3 { font-size: 22px; line-height: 1.4; margin: 0; color: var(--subject); }
.preview-topic-caption { font-size: 14px; color: var(--muted); margin: 3px 0 14px; }
.preview-detail-row + .preview-detail-row { margin-top: 12px; }
.preview-detail-label { display: grid; grid-template-columns: minmax(0,1fr) 96px; gap: 10px; align-items: center; font-size: 16px; line-height: 1.4; }
.preview-detail-label > span { font-weight: 750; }
.preview-detail-value { font-size: 18px; font-weight: 800; line-height: 26px; color: var(--muted); font-variant-numeric: tabular-nums; white-space: nowrap; text-align: right; }
.preview-detail-value.is-pending { font-size: 14px; }
.preview-detail-track { position: relative; height: 9px; margin-top: 6px; background: #eee9f3; border-radius: 10px; overflow: hidden; }
.preview-detail-band { position: absolute; left: var(--range-start); width: var(--range-width); height: 100%; border-radius: inherit; background: #a084cf; }
.preview-detail-signal { display: block; min-height: 21px; margin-top: 5px; font-size: 14px; font-weight: 750; color: var(--muted); opacity: 0; transform: translateY(3px); }
.has-guidance .preview-detail-signal { opacity: 1; transform: none; }
.has-guidance .is-focus .preview-detail-value, .has-guidance .is-focus .preview-detail-signal { color: #97532f; }
.has-guidance .is-focus .preview-detail-band { background: #b16b40; }
.has-guidance .is-strength .preview-detail-value, .has-guidance .is-strength .preview-detail-signal { color: #28735e; }
.has-guidance .is-strength .preview-detail-band { background: #36816b; }
.preview-details > .preview-disclaimer { font-size: 14px; margin: 20px 0 0; }
[data-subject="Math"] { --subject: #a6503c; }
[data-subject="Science"] { --subject: #267662; }
[data-subject="Reading"] { --subject: #3c6ea9; }
[data-subject="English"] { --subject: #7652b4; }

.sample-practice { scroll-margin-top: 24px; margin-top: 16px; min-width: 0; }
.sample-intro { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 14px; margin-bottom: 22px; }
.sample-intro h2 { font: 450 30px/1.2 Fredoka, sans-serif; letter-spacing: -.5px; margin: 0 0 6px; }
.sample-intro p { color: var(--muted); font-size: 15px; margin: 0; }
.sample-intro .sample-signup { font-size: 14px; }
.sample-toolbar { display: flex; justify-content: space-between; align-items: flex-start; flex-wrap: wrap; gap: 12px 24px; margin-bottom: 22px; }
.sample-about { flex: 1 1 250px; max-width: 500px; color: var(--muted); font-size: 13px; line-height: 1.6; }
.sample-about summary { display: flex; align-items: center; min-height: 50px; width: fit-content; cursor: pointer; text-decoration: underline; text-underline-offset: 3px; }
.sample-about .sample-diagnostic-note { margin: 0; font-size: 13px; }
.sample-size { display: flex; align-items: center; gap: 14px; font-size: 14px; color: var(--muted); }
.sample-size-options { display: flex; padding: 4px; gap: 4px; border: 1px solid var(--line); border-radius: 13px; background: #fff; }
.sample-size-options button { min-width: 46px; min-height: 42px; border: 0; border-radius: 9px; background: transparent; color: var(--muted); }
.sample-size-options button[aria-pressed="true"] { color: var(--purple); background: #f0e9ff; font-weight: 850; }
.sample-size-options button:disabled { opacity: .6; }
.sample-questions { display: grid; gap: 22px; }
.sample-card { background: #fff; border: 1px solid var(--line); border-radius: 20px; padding: 28px; scroll-margin-top: 20px; min-width: 0; }
.sample-heading { position: relative; display: flex; align-items: center; margin-bottom: 17px; }
.sample-meta { display: flex; align-items: center; gap: 12px; min-width: 0; width: 100%; }
.sample-number { flex-shrink: 0; color: var(--muted); font-size: 13px; }
.sample-topic-label,.sample-topic-trigger { display: inline-flex; align-items: center; gap: 6px; min-width: 0; color: var(--muted); font-size: 13px; line-height: 1.4; }
.sample-topic-label { min-height: 44px; padding-block: 5px; }
.sample-topic-menu { min-width: 0; }
.sample-topic-trigger { min-height: 44px; padding: 5px 7px; margin-left: -7px; border-radius: 8px; cursor: pointer; list-style: none; }
.sample-topic-trigger::-webkit-details-marker { display: none; }
.sample-topic-trigger:hover,.sample-topic-menu[open] .sample-topic-trigger { color: var(--ink); background: #f8f6fb; }
.sample-topic-trigger svg,.sample-topic-separator { flex-shrink: 0; }
.sample-topic-trigger svg { margin-left: 2px; }
.sample-topic-menu[open] .sample-topic-trigger svg { transform: rotate(180deg); }
.sample-topic-name { min-width: 0; }
.sample-kicker { font-size: 12px; font-weight: 800; color: var(--subject); }
.sample-topic-label .sample-kicker,.sample-topic-trigger .sample-kicker { white-space: nowrap; }
.sample-card h2, .sample-question { font-size: 18px; font-weight: 650; line-height: 1.6; margin: 0 0 22px; }
.sample-card fieldset { border: 0; padding: 0; margin: 0; display: grid; gap: 9px; }
.sample-choice { position: relative; display: flex; align-items: center; gap: 12px; min-height: 51px; padding: 10px 13px; border: 1px solid var(--line); border-radius: 11px; font-size: 15px; cursor: pointer; }
.sample-choice input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.sample-choice:has(input:focus-visible) { outline: 3px solid var(--purple); outline-offset: 3px; }
.sample-choice:has(input:checked:enabled) { border-color: var(--purple); background: #f8f4ff; }
.sample-choice:hover:has(input:enabled) { border-color: #aa8edc; }
.sample-letter { display: grid; place-items: center; width: 26px; height: 26px; flex: 0 0 26px; border: 1px solid var(--line); border-radius: 7px; color: var(--muted); font-size: 11px; }
.sample-choice:has(input:checked:enabled) .sample-letter { background: var(--purple); color: #fff; border-color: var(--purple); }
.sample-choice.is-correct { background: #eff8f1; border-color: #297460; }
.sample-choice.is-incorrect { background: #fff7e8; border-color: #876329; }
.sample-choice.is-correct .sample-letter { background: #297460; color: #fff; border-color: #297460; }
.sample-choice.is-incorrect .sample-letter { background: #876329; color: #fff; border-color: #876329; }
.sample-choice:has(input:disabled) { cursor: default; }
.answer-mark { margin-left: auto; font-weight: 800; color: #297460; }
.is-incorrect .answer-mark { color: #876329; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 16px; min-height: 46px; border: 0; border-radius: 11px; padding: 11px 20px; font-size: 14px; font-weight: 800; text-decoration: none; }
.primary { background: var(--purple); color: #fff; box-shadow: 0 2px 0 #593992; }
.primary:hover:not(:disabled) { background: #6540b0; }
.primary:disabled { background: #b4a2d9; box-shadow: 0 2px 0 #a591c8; }
.sample-submit { display: flex; gap: 16px; align-items: center; margin-top: 21px; }
.sample-submit .button { min-height: 49px; }
.sample-submit > span { color: var(--muted); font-size: 12px; }
.sample-footnote { font-size: 11px; color: var(--muted); margin: 16px 0 0; }
.sample-passage { border-left: 3px solid #b7cce6; background: #f5f8fc; margin: 0 0 20px; padding: 12px 15px; font-size: 14px; line-height: 1.8; }
.sample-visual { max-width: 510px; margin: 0 auto 26px; padding: 18px 20px 14px; border: 1px solid #e2ece8; border-radius: 16px; background: #f8fbfa; }
.sample-visual figcaption { text-align: center; font-size: 17px; font-weight: 800; margin-bottom: 12px; }
.sample-visual svg { display: block; width: 100%; height: auto; }
.sample-question { white-space: pre-line; }
.reading-title { font-weight: 850; font-size: 1.1em; }
.reading-heading, .reading-label { font-weight: 850; }
.reading-step { display: inline-block; width: 100%; padding-inline-start: 1.5em; text-indent: -1.5em; vertical-align: top; margin-block: .12em; }
.vocabulary-term { font-weight: 850; }
.sample-bank-visual { max-width: 570px; padding: 10px 12px 0; background: #fff; border-color: var(--line); }
.sample-bank-visual > img { display: block; width: 100%; height: auto; max-height: 320px; object-fit: contain; }
.sample-bank-visual > button { display: flex; align-items: center; justify-content: center; gap: 8px; width: 100%; min-height: 44px; margin-top: 5px; padding: 8px; border: 0; background: transparent; color: var(--purple); font: inherit; font-size: 14px; font-weight: 750; cursor: pointer; }
.sample-bank-visual > button:focus-visible, .sample-diagram-toolbar button:focus-visible, .sample-diagram-zoom button:focus-visible { outline: 3px solid var(--purple); outline-offset: 2px; }
.sample-diagram-dialog { width: min(950px, calc(100vw - 24px)); height: min(900px, calc(100dvh - 24px)); max-width: none; max-height: calc(100dvh - 24px); padding: 0; border: 1px solid var(--line); border-radius: 18px; background: #fff; color: var(--ink); }
.sample-diagram-dialog[open] { display: flex; flex-direction: column; }
.sample-diagram-dialog::backdrop { background: #24213799; }
body:has(.sample-diagram-dialog[open]) { overflow: hidden; }
.sample-diagram-toolbar { position: sticky; top: 0; display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 10px 16px; background: #fff; border-bottom: 1px solid var(--line); }
.sample-diagram-toolbar strong { font-size: 17px; }
.sample-diagram-toolbar button, .sample-diagram-zoom button { flex-shrink: 0; min-width: 44px; min-height: 44px; padding: 8px 12px; border: 0; border-radius: 10px; background: #f4effc; color: var(--purple); font: inherit; font-weight: 750; cursor: pointer; }
.sample-diagram-zoom { display: flex; align-items: center; gap: 5px; padding: 10px; }
.sample-diagram-zoom output { min-width: 48px; text-align: center; font-size: 15px; font-variant-numeric: tabular-nums; }
.sample-diagram-zoom .sample-diagram-fit { margin-left: auto; font-size: 15px; }
.sample-diagram-zoom button:disabled { opacity: .45; cursor: default; }
.sample-diagram-canvas { flex: 1; min-height: 0; overflow: auto; overscroll-behavior: contain; }
.sample-diagram-canvas > img { display: block; max-width: none; height: auto; margin: 0 auto; }
.sample-diagram-canvas:focus-visible { outline: 3px solid var(--purple); outline-offset: -3px; }
.sample-diagram-help { margin: 0; padding: 8px 16px 12px; font-size: 14px; color: var(--muted); }
.sample-card-image { margin: 18px 0; }
.sample-card-image > button { display: block; width: 100%; padding: 10px; border: 1px solid var(--line); border-radius: 14px; color: var(--purple); background: white; font: inherit; cursor: zoom-in; }
.sample-card-image > button[hidden] { display: none; }
.sample-card-image img { display: block; width: 100%; height: auto; max-height: 340px; object-fit: contain; }
.sample-card-image button > span { display: block; padding: 10px 0 2px; font-size: 14px; font-weight: 750; }
.sample-card-image figcaption { margin-top: 8px; color: var(--muted); font-size: 14px; line-height: 1.5; }
.sample-card-image > button:focus-visible { outline: 3px solid var(--purple); outline-offset: 3px; }
.atom-model-layout { display: grid; grid-template-columns: minmax(0,1fr) auto; align-items: center; gap: 8px; }
.atom-key { list-style: none; display: grid; gap: 15px; padding: 0; margin: 0; font-size: 15px; }
.atom-key li { display: flex; align-items: center; gap: 8px; }
.atom-key i { width: 12px; height: 12px; border-radius: 50%; flex-shrink: 0; }
.atom-key .proton { background: #2f877b; }.atom-key .neutron { background: #ae98df; }.atom-key .electron { background: #dd8a45; }
.water-labels { display: grid; grid-template-columns: 1fr 1fr; text-align: center; font-size: 16px; font-weight: 800; }
.water-labels span:first-child { color: #97532f; }.water-labels span:last-child { color: #3c6ea9; }
.visual-caption { text-align: center; font-size: 13px; line-height: 1.5; margin: 10px 0 0; color: #646c7d; }
.sample-answer-footer { display: flex; align-items: center; flex-wrap: wrap; gap: 12px 16px; margin-top: 21px; min-height: 49px; }
.sample-compact-feedback { display: flex; align-items: center; gap: 6px; color: #876329; }
.sample-compact-feedback.is-right { color: #297460; }
.sample-compact-feedback > span { width: 18px; text-align: center; font-size: 18px; }
.sample-compact-feedback h4 { margin: 0; font: 750 14px/1.4 Nunito, sans-serif; }
.sample-explanation-toggle { min-height: 49px; gap: 8px; padding: 10px 12px; border: 1px solid #c5b2e6; background: white; color: var(--purple); box-shadow: none; }
.sample-explanation-toggle svg { flex-shrink: 0; }
.sample-explanation-toggle[aria-expanded="true"] svg { transform: rotate(180deg); }
.sample-feedback { margin-top: 18px; padding: 20px; border: 1px solid var(--line); border-radius: 15px; background: #f8f6fb; }
.sample-feedback[hidden] { display: none; }
.sample-feedback p { font-size: 14px; line-height: 1.75; margin-bottom: 16px; }
.sample-feedback p:last-child { margin-bottom: 0; }
.sample-takeaway { border-left: 3px solid #c5b2e6; padding-left: 14px; color: var(--muted); }
.sample-takeaway strong { display: block; color: var(--ink); }
.sample-feedback .correct-answer { font-size: 13px; }
.sample-flashcards { min-width: 0; margin-top: 20px; padding: 20px; border: 1px solid var(--line); border-radius: 20px; background: white; }
.sample-flashcards-heading { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 8px 18px; margin-bottom: 5px; }
.sample-flashcards-heading h4 { display: flex; align-items: center; gap: 8px; margin: 0; font: 800 18px Nunito, sans-serif; }
.sample-flashcard-library { display: inline-flex; align-items: center; gap: 6px; min-height: 44px; color: var(--purple); font-size: 13px; font-weight: 750; text-decoration: none; }
.sample-flashcards .sample-flashcards-caption { margin: 0 0 12px; color: var(--muted); font-size: 13px; }
.sample-flashcards-list { display: grid; grid-template-columns: repeat(auto-fit,minmax(min(100%,260px),1fr)); gap: 12px; }
.sample-flashcard { min-width: 0; padding: 17px; border: 1px solid var(--line); border-radius: 16px; background: #f8f6fb; overflow-wrap: anywhere; }
.sample-flashcard-topic { display: flex; flex-wrap: wrap; gap: 5px 10px; margin-bottom: 8px; color: var(--muted); font-size: 11px; }
.sample-flashcard-topic > span:first-child { color: var(--purple); font-weight: 800; }
.sample-flashcard .sample-flashcard-prompt { margin: 0 0 12px; font: 800 16px/1.5 Nunito, sans-serif; }
.sample-flashcard-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 8px 13px; }
.sample-flashcard-actions .button { min-height: 44px; padding: 10px 15px; gap: 8px; border-color: #ded6e8; background: white; box-shadow: none; color: var(--ink); font-size: 13px; }
.sample-flashcard-actions svg,.sample-flashcards-heading svg { flex-shrink: 0; }
.sample-flashcard-save { display: inline-flex; align-items: center; justify-content: center; gap: 5px; min-height: 44px; padding: 8px 7px; border-radius: 9px; color: var(--purple); font-size: 12px; font-weight: 800; text-decoration: none; }
.sample-flashcard-save:hover,.sample-flashcard-library:hover { background: #eee7f8; }
.sample-flashcard-answer { padding-top: 15px; margin-top: 14px; border-top: 1px solid var(--line); }
.sample-flashcard-answer-label { display: block; margin-bottom: 9px; color: #297460; font-size: 12px; font-weight: 850; }
.sample-flashcard-answer p { margin: 0; font-size: 16px; line-height: 1.7; }
.sample-flashcard-why { margin-top: 14px; color: var(--muted); }
.sample-flashcard-why p { font-size: 14px; }
.sample-diagnostic-note { margin: 0 0 20px; color: var(--muted); font-size: 14px; line-height: 1.6; }
@media (max-width: 580px) { .sample-flashcards { padding: 16px; } .sample-flashcard { padding: 15px; } .sample-flashcards-heading h4 { font-size: 17px; } }
.sample-topic-progress { position: absolute; z-index: 5; top: calc(100% + 8px); left: 0; right: 0; max-width: 420px; padding: 20px; border: 1px solid var(--line); border-radius: 15px; background: white; box-shadow: 0 10px 35px #2421371a; }
.sample-topic-progress .sample-topic-caption { color: var(--muted); font-size: 14px; margin: 0 0 7px; }
.sample-topic-heading { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; margin-bottom: 12px; }
.sample-topic-heading h4 { margin: 0; font-size: 17px; line-height: 1.4; }
.sample-topic-value { color: var(--subject); font-size: 23px; white-space: nowrap; font-variant-numeric: tabular-nums; }
.sample-topic-track { position: relative; display: block; height: 10px; border-radius: 10px; background: #eee9f4; overflow: hidden; }
.sample-topic-track > span { position: absolute; top: 0; bottom: 0; border-radius: inherit; background: var(--subject); opacity: .75; }
.sample-topic-progress .sample-topic-help { color: var(--muted); font-size: 14px; line-height: 1.6; margin: 12px 0 0; }
.sample-topic-signup { display: inline-flex; align-items: center; min-height: 44px; margin-top: 4px; padding: 8px 0; color: var(--purple); font-size: 15px; font-weight: 750; line-height: 1.5; text-underline-offset: 3px; }
.sample-finish { margin-top: 24px; padding: 20px; border-radius: 14px; background: #f8f5fd; }
.sample-finish h3 { font-size: 22px; }
.sample-access { display: block; margin-top: 15px; font-size: 12px; font-weight: 750; }
.sample-page-footer { padding: 0 4px; }
.sample-page-footer .sample-actions { gap: 12px; }
.sample-page-help { margin: 12px 0 0; font-size: 15px; color: var(--muted); }
.sample-result { font: 450 22px Fredoka, sans-serif; margin: 24px 0 0; }
.sample-error { color: #876329; background: #fff7e8; padding: 16px; border-radius: 12px; }
.footer { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; padding: 23px 0 25px; color: var(--muted); font-size: 10px; text-align: center; }
.footer p { flex-basis: 100%; margin: 0; }
.footer nav { display: flex; flex-wrap: wrap; justify-content: center; gap: 16px; }

@media (min-width: 581px) and (max-width: 799px) {
  .preview-label { min-height: 2.8em; }
}
@media (max-width: 580px) {
  .topbar-inner { width: calc(100% - 36px); min-height: 60px; }
  .brand { font-size: 23px; }
  .brand img { width: 32px; height: 32px; }
  .wrap { width: calc(100% - 32px); }
  .hero { padding-top: 18px; gap: 12px; }
  .hero h1 { font-size: 33px; letter-spacing: -.6px; margin-bottom: 9px; }
  .hero-description { font-size: 15px; max-width: 340px; margin-inline: auto; }
  .progress-preview { padding: 17px 14px 8px; }
  .preview-intro p { font-size: 26px; }
  .preview-overview { gap: 12px; }
  .preview-label { font-size: 15px; min-height: 2.8em; }
  .preview-answer-label { min-height: 4.2em; }
  .preview-answer-stat { padding-left: 12px; }
  .preview-answer-count { font-size: 40px; min-height: 60px; }
  .preview-score-slot { min-height: 60px; }
  .preview-score-value { font-size: 50px; }
  .preview-score-value.is-pending { font-size: 15px; }
  .preview-diagnostic-story { grid-template-columns: minmax(0,1fr); gap: 12px; margin-top: 12px; }
  .preview-map-layout { grid-template-columns: minmax(0,165px) 110px; gap: 12px; max-width: 287px; }
  .preview-map-legend { grid-template-columns: 1fr; padding: 0; gap: 0; }
  .preview-topic-detail { padding: 13px 14px; }
  .preview-topic-caption { margin-bottom: 12px; }
  .preview-detail-label > span { max-width: none; }
  .sample-card { padding: 20px 18px; border-radius: 17px; }
  .sample-heading { margin-bottom: 14px; }
  .sample-card h2, .sample-question { font-size: 17px; margin-bottom: 17px; }
  .sample-intro { margin-bottom: 18px; }
  .sample-toolbar { justify-content: flex-start; gap: 8px; }
  .sample-about { flex-basis: 100%; }
  .sample-about summary { min-height: 44px; }
  .sample-meta { align-items: flex-start; gap: 8px; }
  .sample-number { padding-block: 5px; }
  .sample-topic-trigger { padding-top: 5px; }
  .sample-topic-progress { padding: 16px; }
  .sample-feedback { padding: 16px; }
  .sample-topic-heading { flex-wrap: wrap; gap: 4px 12px; }
  .sample-topic-heading h4 { flex: 1 1 170px; }
  .sample-visual { padding: 15px 10px 12px; }
  .atom-model-layout { grid-template-columns: minmax(0,1fr); }
  .atom-model-layout svg { max-width: 260px; margin: auto; }
  .atom-key { display: flex; justify-content: center; flex-wrap: wrap; gap: 8px 12px; font-size: 14px; }
  .sample-choice { min-height: 49px; font-size: 14px; padding: 10px 11px; }
  .sample-submit { margin-top: 19px; gap: 13px; }
  .button { font-size: 13px; padding: 11px 17px; }
  .sample-submit > span { font-size: 11px; }
}
@media (max-width: 360px) {
  .hero h1 { font-size: 30px; }
  .preview-intro p { font-size: 24px; }
  .preview-label { min-height: 4.2em; }
  .preview-score-value { font-size: 42px; }
  .preview-answer-count { font-size: 36px; }
  .preview-detail-label { grid-template-columns: minmax(0,1fr); gap: 3px; }
  .preview-detail-value { font-size: 18px; min-height: 26px; text-align: left; }
  .sample-card { padding-inline: 15px; }
  .sample-choice { gap: 9px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; }
}
@media (prefers-reduced-motion: no-preference) {
  .preview-score-band { transition: opacity 600ms ease; }
  .preview-detail-band { transition: left 1200ms ease, width 1200ms ease, opacity 600ms ease, background-color 900ms ease; }
  .preview-topic-detail { transition: opacity 500ms ease, transform 500ms ease, border-color 900ms ease, box-shadow 900ms ease; }
  .preview-detail-signal { transition: opacity 900ms ease, transform 900ms ease; }
  .preview-map-rim, .preview-map-band, .preview-map-dot, .preview-map-highlight { transition: stroke-width 900ms ease, fill 900ms ease, opacity 900ms ease; }
}
.progress-preview.is-resetting, .progress-preview.is-resetting * { transition: none !important; }

.explanation-text { max-width: 68ch; font-size: 16px; line-height: 1.7; overflow-wrap: anywhere; }
.explanation-text > :first-child { margin-top: 0; }
.explanation-text > :last-child { margin-bottom: 0; }
.explanation-text p, .feedback .explanation-text p, .sample-feedback .explanation-text p { margin: 0 0 16px; font-size: inherit; line-height: inherit; white-space: normal; }
.explanation-text strong { font-weight: 800; color: inherit; }
.explanation-text ul, .explanation-text ol { margin: 14px 0 18px; padding-left: 26px; }
.explanation-text li { padding-left: 5px; margin: 9px 0; }
.explanation-text li::marker { color: var(--purple, #7951c5); font-weight: 800; }
.explanation-text .explanation-steps { padding-left: 30px; }
.explanation-text .explanation-steps li { padding: 9px 12px; border-radius: 10px; background: color-mix(in srgb, var(--purple, #7951c5) 6%, transparent); }
.explanation-figure { margin: 22px 0; padding: 18px; border: 1px solid #e5def4; border-radius: 16px; background: white; }
.explanation-figure-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(190px,100%),1fr)); gap: 16px; margin: 16px 0; }
.explanation-text .explanation-figure-grid p { margin-bottom: 8px; font-weight: 800; }
.explanation-figure-grid img { display: block; width: 100%; max-width: 480px; height: auto; margin: 0 auto; }
.explanation-figure-grid:has(> :only-child) { grid-template-columns: 1fr; }
@media (max-width: 580px) { .explanation-text { font-size: 16px; line-height: 1.65; } }

:root{--study-color:#7550be;--study-tint:#f2ebfc}
body{background:radial-gradient(ellipse at 5% 12%,#efe7ff85,transparent 38%),radial-gradient(ellipse at 95% 25%,#e6f4e85c,transparent 40%),#fcf9f2}
.wrap{width:min(100% - 48px,1180px)}
.topbar-inner{width:min(100% - 48px,1180px)}
.hero{gap:20px;padding-top:26px}
.hero-copy{padding:0;text-align:center}
.hero h1{font-size:42px;margin-bottom:9px}
.hero h1 em{color:var(--study-color)}
.hero h1 .exam-name{white-space:nowrap}
.study-choice>p{font-size:14px;font-weight:850;margin:0 0 9px;text-align:center}
.study-switcher{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}
.study-product{--card-color:#7550be;--card-tint:#f2ebfc;display:flex;align-items:center;gap:11px;min-height:80px;padding:13px 15px;border:1.5px solid #e3dfe8;border-radius:17px;background:#ffffffcf;text-decoration:none;box-shadow:0 3px 0 #e9e4eb70;position:relative;transition:transform .15s,border-color .15s,background .15s}
.study-product[data-product-link="nclex-rn"]{--card-color:#176a77;--card-tint:#e8f5f4}
.study-product[data-product-link="nclex-pn"]{--card-color:#ad503b;--card-tint:#fff0e8}
.study-product[data-product-link="anatomy-physiology"]{--card-color:#496d39;--card-tint:#edf4e4}
.study-product:hover{transform:translateY(-2px);border-color:var(--card-color)}
.study-product.is-active{border-color:var(--card-color);background:var(--card-tint);box-shadow:0 3px 0 color-mix(in srgb,var(--card-color) 28%,white)}
.product-monogram{flex:none;display:grid;place-items:center;width:41px;height:43px;border-radius:13px;background:var(--card-tint);color:var(--card-color);font:500 17px Fredoka,sans-serif}
.study-product.is-active .product-monogram{background:var(--card-color);color:white}
.study-product strong{display:block;font-size:16px;line-height:1.2}
.study-product small{display:block;font-size:12px;line-height:1.35;color:var(--muted);margin-top:5px}
.product-choice-mark{position:absolute;right:9px;top:6px;font-size:12px;color:var(--card-color);opacity:0}
.is-active .product-choice-mark{opacity:1}
.hero-actions{margin:0;gap:10px;align-items:center}
.hero-actions .button{font-size:14px;min-height:42px;padding:9px 16px}
.landing-free-note{font-size:13px;color:var(--muted)}
.landing-courses{width:min(100%,920px);margin:8px auto 0}
.landing-workspace{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(360px,.9fr);gap:24px;align-items:start;margin-top:3px}
.landing-practice{min-width:0}
.landing-preview{min-width:0;position:sticky;top:18px}
.sample-practice{margin-top:0;scroll-margin-top:20px}
.sample-intro{margin:0 0 14px;gap:10px;align-items:center}
.sample-intro h2{font-size:24px;margin-bottom:4px}
.sample-intro p{font-size:14px}
.sample-intro .sample-signup{font-size:12px;padding:7px 10px;min-height:36px}
.sample-toolbar{margin-bottom:13px;gap:8px}
.sample-toolbar,.sample-size{font-size:12px}
.sample-size-options button{min-width:32px;min-height:34px}
.sample-size>span{max-width:80px;line-height:1.2}
.sample-card{padding:22px;border-radius:20px;box-shadow:0 8px 25px #30334b06;background:#fff}
.sample-question{font-size:20px;line-height:1.5}
.sample-heading{margin-bottom:13px}
.sample-choice{font-size:16px}
.sample-meta{flex-wrap:wrap;font-size:12px;gap:6px}
.sample-flashcards{border-color:color-mix(in srgb,var(--study-color) 20%,white);background:color-mix(in srgb,var(--study-tint) 60%,white)}
.sample-storage-note{font-size:12px;line-height:1.6}
.sample-page-footer{padding:0 3px}
.sample-page-footer .sample-actions{margin-top:12px}
.demo-position{font-size:13px;font-weight:850;color:var(--study-color);background:var(--study-tint);border-radius:99px;padding:6px 12px;white-space:nowrap}
.demo-loading{padding:40px;background:#fff;border:1px solid var(--line);border-radius:20px}
.landing-preview .progress-preview{padding:20px 20px 12px;border-radius:22px;background:#f2ebfc}
.landing-preview .preview-score-value{font-size:45px}
.landing-preview .preview-score-value.is-pending{font:750 15px/1.4 Nunito,sans-serif}
.landing-preview .preview-score-slot,.landing-preview .preview-answer-count{min-height:57px}
.landing-preview .preview-answer-count{font-size:38px}
.landing-preview .preview-label{font-size:13px}
.landing-preview .preview-example{font-size:12px}
.landing-preview .preview-stage{font-size:13px;min-height:3em;margin-top:10px}
.landing-preview .preview-diagnostic-story{grid-template-columns:minmax(120px,.8fr) minmax(0,1.2fr);gap:12px;margin:15px 0 8px}
.landing-preview .preview-map-layout{grid-template-columns:minmax(0,1fr);gap:3px;max-width:240px}
.landing-preview .preview-map-legend{grid-template-columns:1fr 1fr;font-size:11px;gap:0}
.landing-preview .preview-map-legend>button{min-height:34px;padding:4px;gap:4px}
.landing-preview .preview-topic-detail{padding:12px 10px}
.landing-preview .preview-topic-heading h3{font-size:17px}
.landing-preview .preview-detail-label{font-size:12px}
.landing-preview .preview-detail-value{font-size:13px}
.landing-preview .preview-topic-caption,.landing-preview .preview-detail-signal{font-size:11px}
.landing-preview .preview-motion-control,.landing-preview .preview-explanation>summary{font-size:13px}
.landing-preview .preview-details>p{font-size:13px}
/* Non-TEAS demos share the compact TEAS card layout and spacing. */
.product-preview{--purple:var(--study-color);padding:20px 20px 12px;background:var(--study-tint);border:1px solid color-mix(in srgb,var(--study-color) 20%,white);border-radius:22px}
.product-preview .preview-intro h2{font:450 29px/1.2 Fredoka,sans-serif;margin:8px 0 0}
.product-preview .preview-intro h2 em{font-style:normal;color:var(--study-color)}
.product-preview .preview-answer-stat{border-color:color-mix(in srgb,var(--study-color) 22%,white)}
.product-preview .preview-score-track{background:color-mix(in srgb,var(--study-color) 13%,white)}
.product-preview .preview-score-band{background:color-mix(in srgb,var(--study-color) 65%,white)}
.product-topic-map{display:block;width:100%;height:auto}
.product-map-disc{fill:none}
.product-map-ring,.product-map-spoke{fill:none;stroke:var(--study-color);stroke-opacity:.17;stroke-width:1}
.product-map-spoke{stroke-opacity:.12}
.product-map-shape{fill:color-mix(in srgb,var(--study-color) 7%,transparent);stroke:var(--study-color);stroke-opacity:.6;stroke-width:1.8;stroke-linejoin:round}
.product-map-band{fill:var(--area-color);fill-opacity:.15}
.product-map-band.is-selected{fill-opacity:.32}
.product-map-rim{fill:none;stroke:var(--area-color);stroke-width:3;stroke-linecap:round;opacity:.45}
.product-map-rim.is-selected{stroke-width:5;opacity:1}
.product-map-halo{fill:none;stroke:var(--area-color);stroke-width:1.5;opacity:0}
.product-map-point.is-selected .product-map-halo{opacity:1}
.product-map-dot{fill:var(--area-color);stroke:var(--study-tint);stroke-width:1.5}
.product-map-point.is-focus .product-map-dot{fill:#b16b40}
.product-map-point.is-focus .product-map-halo{stroke:#b16b40}
.product-preview[data-example-groups="2"] .product-area-chooser{grid-template-columns:1fr}
.product-area-chooser button{cursor:pointer}
.product-area-chooser button i{flex:none}
.product-area-chooser button:hover{background:color-mix(in srgb,var(--subject) 8%,white)}
.product-area-chooser button:focus-visible{outline:2px solid var(--subject);outline-offset:2px}
.product-preview .preview-detail-label{grid-template-columns:minmax(0,1fr) 70px;gap:8px}
.product-preview .preview-detail-track{background:color-mix(in srgb,var(--study-color) 10%,white)}
.product-preview .preview-detail-band{background:color-mix(in srgb,var(--subject) 65%,white)}
/* The product tour interpolates these on one JS clock. Inherited TEAS
   transitions would retarget every frame, lag behind, and outlive Pause. */
.product-preview .preview-score-band,.product-preview .preview-detail-band,.product-preview .preview-topic-detail,.product-preview .preview-detail-signal{transition:none}
.product-preview .is-focus .preview-detail-band{background:#b16b40}
.product-preview .is-strength .preview-detail-band{background:#36816b}
.product-preview .product-topic-signal{min-height:14px;line-height:14px;margin-top:3px;transform:none;font-size:10px}
.product-preview .product-topic-row+.product-topic-row{margin-top:8px}
.product-preview .preview-motion-control:hover{background:color-mix(in srgb,var(--study-color) 8%,white)}
.product-preview .preview-explanation>summary:hover{color:var(--study-color)}
.landing-learning-loop{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:35px;padding:38px 0 20px;margin-top:30px;border-top:1px solid var(--line);list-style:none}
.landing-learning-loop li{position:relative;min-width:0;padding-left:39px}
.landing-step-index{position:absolute;left:0;top:2px;display:grid;place-items:center;width:27px;height:27px;border-radius:50%;background:var(--study-tint);color:var(--study-color);font:500 16px Fredoka,sans-serif}
.landing-learning-loop li+li:before{content:'→';position:absolute;left:-28px;top:2px;color:var(--muted);font-size:20px}
.landing-learning-loop h2{font:450 24px Fredoka,sans-serif;margin-bottom:8px}
.landing-learning-loop p{font-size:14px;line-height:1.6;color:var(--muted)}
.footer-products{margin-bottom:18px;flex-wrap:wrap;font-weight:800}
@media(max-width:1000px){.wrap,.topbar-inner{width:min(100% - 32px,1180px)}.study-product{gap:8px;padding:12px 10px}.product-monogram{width:32px;height:37px;font-size:14px}.study-product strong{font-size:14px}.study-product small{font-size:11px}.landing-workspace{gap:18px;grid-template-columns:minmax(0,1.1fr) minmax(330px,.9fr)}.sample-card{padding:18px}.sample-intro{flex-wrap:wrap}}
@media(max-width:760px){
  .hero{padding-top:22px;gap:17px}.hero h1{font-size:34px}.hero-description{font-size:14px;max-width:480px}
  .landing-eyebrow{font-size:11px}.study-switcher{grid-template-columns:1fr 1fr;gap:10px}
  .study-product{min-height:70px;padding:12px;gap:10px}.study-product strong{font-size:14px}.study-product small{font-size:11px}.product-monogram{width:34px;height:38px}
  .landing-workspace{display:flex;flex-direction:column;gap:22px}.landing-preview{position:static;width:100%;order:0}.landing-practice{width:100%;order:1}
  .landing-preview .progress-preview{padding:20px 18px 10px}
  .landing-preview .preview-diagnostic-story{grid-template-columns:minmax(0,1fr)}
  .landing-preview .preview-map-layout{grid-template-columns:minmax(0,165px) 110px;gap:12px;max-width:287px}
  .landing-preview .preview-map-legend{grid-template-columns:1fr}
  .landing-preview .preview-stage{min-height:3em}
  .landing-preview .preview-score-value{font-size:38px}.landing-preview .preview-answer-count{font-size:34px}
  .landing-preview .preview-explanation>summary{font-size:13px;min-height:44px}
  .product-preview{padding:20px 18px 10px}
  .hero-actions{flex-direction:row;gap:8px}.hero-actions .button{font-size:12px;padding:8px 12px;min-height:38px}.landing-free-note{display:none}
  .landing-learning-loop{gap:17px;padding-top:25px;margin-top:24px}.landing-learning-loop h2{font-size:19px}.landing-learning-loop p{font-size:12px}
}
@media(max-width:420px){.wrap,.topbar-inner{width:calc(100% - 24px)}.hero h1{font-size:30px}.hero-description{font-size:13px}.study-product{gap:7px;padding:10px 8px}.study-product strong{font-size:12px}.product-monogram{width:29px;height:34px;font-size:13px}.study-product small{font-size:10px}.sample-intro h2{font-size:23px}.sample-question{font-size:18px}.sample-card{padding:16px}.sample-choice{font-size:15px}.sample-toolbar{flex-wrap:wrap}.sample-actions{flex-direction:row;align-items:center}.landing-learning-loop{grid-template-columns:1fr;gap:16px}}
@media(prefers-reduced-motion:reduce){.study-product,.product-topic-fill{transition:none}}
.landing-learning-loop h2{font-size:22px}
@media(max-width:760px){.landing-learning-loop{grid-template-columns:1fr;gap:18px}.landing-learning-loop li+li:before{display:none}.landing-learning-loop h2{font-size:20px}.landing-learning-loop p{font-size:13px}.landing-step-index{top:0}}
.landing-practice .sample-intro p{font-size:12px;margin-bottom:0}
.science-demo-link, .product-short-name { display: none; }
.membership-announcement { background:#f0eafa; color:#42266f; border-bottom:1px solid #dfd1ee; }
.membership-announcement[hidden] { display:none; }
.membership-announcement a { display:flex; flex-wrap:wrap; justify-content:center; align-items:baseline; column-gap:14px; padding:8px 12px; color:inherit; text-align:center; text-decoration:none; font:650 14px/1.45 Nunito,sans-serif; }
.membership-announcement .offer-prices { display:inline-flex; align-items:baseline; gap:7px; }
.membership-announcement del { color:#685a76; }
.membership-announcement .offer-link { margin-left:5px; white-space:nowrap; font-weight:800; text-decoration:underline; text-underline-offset:3px; }
.membership-announcement a:focus-visible { outline:2px solid var(--purple); outline-offset:-3px; }
@media(max-width:600px) { .membership-announcement a { min-height:44px; font-size:13px; padding-block:5px; } }
@media (max-width: 760px) {
  [data-landing="science-practice"][data-study-product="teas"] .landing-practice { order: 0; }
  [data-landing="science-practice"][data-study-product="teas"] .landing-preview { order: 1; scroll-margin-top: 12px; }
  [data-landing="science-practice"][data-study-product="teas"] .hero { gap: 8px; padding-top: 14px; }
  [data-landing="science-practice"][data-study-product="teas"] .hero h1 { margin-bottom: 0; }
  [data-landing="science-practice"][data-study-product="teas"] #study-choice-label { position:absolute; width:1px; height:1px; margin:-1px; overflow:hidden; clip-path:inset(50%); }
  [data-landing="science-practice"][data-study-product="teas"] .study-switcher { grid-template-columns: repeat(4, minmax(0,1fr)); gap: 5px; }
  [data-landing="science-practice"][data-study-product="teas"] .study-product { justify-content: center; min-height: 44px; padding: 6px; border-radius: 12px; }
  [data-landing="science-practice"][data-study-product="teas"] .study-product :is(.product-monogram, .product-choice-mark, small, .product-full-name) { display: none; }
  [data-study-product="teas"] .product-short-name { display: inline; }
  .science-intro { display: grid; grid-template-columns: minmax(0,1fr) auto; gap: 2px 8px; }
  .science-intro > div { display: contents; }
  .science-intro h2 { align-self: center; margin: 0; font-size: 20px; }
  .science-intro p { grid-row: 2; grid-column: 1/-1; }
  [data-study-product="teas"] .science-demo-link { display: inline-flex; align-items: center; grid-row: 1; grid-column: 2; min-height: 44px; color: var(--purple); font-size: 12px; font-weight: 750; text-underline-offset: 3px; }
}
.science-self-check + .science-self-check { margin-top: 18px; }
.science-question-nav { display:flex; align-items:center; flex-wrap:wrap; gap:4px; margin:0 0 16px; }
.science-question-nav button { position:relative; min-width:44px; min-height:44px; padding:6px; border:1px solid var(--line); border-radius:12px; background:white; color:var(--ink); font:800 15px Nunito,sans-serif; cursor:pointer; }
.science-question-nav button:is(:hover,:focus-visible) { border-color:var(--purple); color:var(--purple); }
.science-question-nav button:focus-visible { outline:2px solid var(--purple); outline-offset:1px; }
.science-question-nav button.is-checked { color:#256754; border-color:#add5c5; background:#eff8f3; }
.science-question-nav button span { margin-left:2px; font-size:11px; }
.science-question-nav > span { margin-left:6px; color:var(--muted); font:750 12px Nunito,sans-serif; }
.science-question-nav ~ .sample-questions .sample-question { scroll-margin-top:20px; }
.science-check-result { margin-top:14px; }
.science-self-check summary { padding-block: 10px; color: var(--purple); font-weight: 750; cursor: pointer; }
.science-feedback-actions { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:8px; min-width:0; }
.science-feedback-actions .sample-explanation-toggle { min-height:44px; }
.science-feedback-actions .sample-explanation-toggle[aria-expanded="true"] { border-color:var(--purple); background:#f5f0fc; }
.science-feedback-actions .sample-explanation-toggle:focus-visible,
.science-native-panels summary:focus-visible { outline:2px solid var(--purple); outline-offset:2px; }
.science-native-panels { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:8px; align-items:start; }
.science-native-panels > details > summary { padding:10px; text-align:center; border:1px solid #c5b2e6; border-radius:12px; }
.science-native-panels .sample-feedback, .science-native-panels .sample-flashcards { margin-top:4px; }
@supports selector(::details-content) {
  .science-native-panels > details { display:contents; }
  .science-native-panels > details > summary { grid-row:1; }
  .science-native-panels > details::details-content { grid-column:1/-1; }
  .science-native-panels > details:not([open])::details-content { display:none; }
}
@media (max-width:600px) {
  .science-feedback-actions { width:100%; }
  .science-feedback-actions .sample-explanation-toggle { gap:4px; padding:8px 4px; font-size:13px; }
  .science-feedback-actions .sample-explanation-toggle svg { width:14px; }
}
.sample-science-link { align-self: center; padding: 9px 0; color: var(--purple); font-weight: 750; text-underline-offset: 3px; }
.ap-atlas-pathways{display:none}
body[data-study-product="anatomy-physiology"] .landing-learning-loop{display:none}
body[data-study-product="anatomy-physiology"] .ap-atlas-pathways{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:30px;margin:32px 0 12px;padding:28px 0;border-block:1px solid #cdd9c7;scroll-margin-top:24px}
.ap-atlas-pathways h2{grid-column:1/-1;margin:0;font:450 28px/1.15 Fredoka,sans-serif;color:var(--ink)}
.ap-atlas-pathways a{min-width:0;text-decoration:none;color:var(--ink)}
.ap-atlas-pathways strong{display:block;color:#315637;font:450 23px/1.2 Fredoka,sans-serif;margin-bottom:6px}
.ap-atlas-pathways strong span{font:500 16px system-ui;white-space:nowrap}
.ap-atlas-pathways a>span{color:var(--muted);font-size:14px;line-height:1.5}
.ap-atlas-pathways a:hover strong,.ap-atlas-pathways a:focus-visible strong{text-decoration:underline;text-underline-offset:4px}
@media(max-width:650px){
  body[data-study-product="anatomy-physiology"] .ap-atlas-pathways{grid-template-columns:1fr;gap:22px}
}

.ap-study-choices {
  --ap-accent: #35654f;
  --ap-line: #a9bdad;
  --ap-selected: #eff5ed;
  --ap-caption: #59685e;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  align-items: center;
  gap: clamp(20px, 3vw, 40px);
  text-align: left;
}
.ap-semesters { margin: 0; padding: 0; min-width: 0; border: 0; }
.ap-semesters legend { float: none; padding: 0; margin: 0 0 10px; font-size: 16px; line-height: 1.3; font-weight: 800; color: var(--ink); }
.ap-semester-options { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.ap-semester {
  display: flex; align-items: flex-start; gap: 11px; min-width: 0; cursor: pointer;
  padding: 18px 14px; border: 1px solid var(--border, #dedfe1); border-radius: 14px;
  background: var(--surface, #fff); color: var(--ink);
}
.ap-semester:hover { border-color: var(--ap-line); }
.ap-semester:has(:checked) { background: var(--ap-selected); border-color: var(--ap-accent); }
.ap-semester:has(:focus-visible), .ap-atlas-feature:focus-visible { outline: 3px solid var(--ap-accent); outline-offset: 3px; }
.ap-semester input[type=checkbox] {
  appearance: none; position: static; display: grid; place-content: center; flex: none; cursor: pointer;
  margin: 1px 0 0; width: 26px; height: 26px; opacity: 1;
  border: 2px solid #78867c; border-radius: 7px; background: var(--surface, #fff);
}
.ap-semester input:checked { background: var(--ap-accent); border-color: var(--ap-accent); }
.ap-semester input:checked::after {
  content: ""; width: 6px; height: 12px; margin-top: -3px;
  border: solid white; border-width: 0 2.5px 2.5px 0; transform: rotate(45deg);
}
.ap-semester input:focus-visible { outline: none; }
.ap-semester span { display: grid; gap: 3px; min-width: 0; }
.ap-semester strong { font-size: 20px; line-height: 1.25; font-weight: 800; }
.ap-semester small, .ap-semester-hint { font-size: 13px; line-height: 1.4; font-weight: 550; color: var(--ap-caption); }
.ap-semester-hint { margin: 8px 0 0; }
.ap-atlas-feature {
  position: relative; isolation: isolate; overflow: hidden; display: flex; align-items: center; min-width: 0; min-height: 158px;
  border: 1px solid #b3c8b8; border-radius: 17px; padding: 20px 43% 20px 22px;
  background: linear-gradient(110deg, #f0f5eb, #e3eede 62%, #cedfce);
  color: #214b39; text-decoration: none;
}
.ap-atlas-feature::before {
  content: ""; position: absolute; z-index: -1; inset: 0; pointer-events: none;
  background: repeating-radial-gradient(circle at 83% 51%, transparent 0 37px, #426d581a 38px, transparent 39px 54px);
  mask-image: linear-gradient(90deg, transparent 41%, black 73%);
}
.ap-atlas-copy { position: relative; z-index: 1; display: grid; justify-items: start; }
.ap-atlas-copy > strong { font: 450 clamp(24px, 3vw, 34px)/1.08 "Fredoka Variable", Fredoka, sans-serif; letter-spacing: -.025em; }
.ap-atlas-copy > span:not(.ap-atlas-cta) { margin-top: 7px; font-size: 14px; line-height: 1.4; max-width: 32ch; color: #405c4a; }
.ap-atlas-cta { display: inline-flex; align-items: center; gap: 7px; margin-top: 13px; font-size: 14px; line-height: 1.25; font-weight: 850; }
.ap-atlas-feature:hover { border-color: var(--ap-accent); }
.ap-atlas-feature:hover .ap-atlas-cta { text-decoration: underline; text-underline-offset: 3px; }
.ap-atlas-figure { position: absolute; z-index: -1; width: 42%; max-width: 210px; height: auto; top: 7%; right: 0; pointer-events: none; }
[data-theme=dark] .ap-study-choices { --ap-accent: #9bceaa; --ap-line: #779783; --ap-selected: #2a4139; --ap-caption: #c3cec5; }
[data-theme=dark] .ap-semester input:checked::after { border-color: #1d3528; }
[data-theme=dark] .ap-atlas-feature { color: #ecf4e9; border-color: #50775f; background: linear-gradient(110deg, #213d32, #2b4c3a 65%, #3a5b45); }
[data-theme=dark] .ap-atlas-feature::before { opacity: .65; filter: brightness(2); }
[data-theme=dark] .ap-atlas-copy > span:not(.ap-atlas-cta) { color: #c7ddcb; }
@media (max-width: 820px) {
  .ap-study-choices { grid-template-columns: 1fr; gap: 16px; }
  .ap-semester { padding: 14px; }
  .ap-atlas-feature { min-height: 138px; padding-right: 39%; }
  .ap-atlas-figure { width: 37%; max-width: 158px; right: 3%; }
}
@media (max-width: 440px) {
  .ap-semester { padding: 12px 10px; gap: 8px; }
  .ap-semester strong { font-size: 18px; }
  .ap-semester small { font-size: 12px; }
  .ap-atlas-feature { padding-left: 16px; }
}
@media (forced-colors: active) {
  .ap-semester input[type=checkbox] { appearance: auto; }
  .ap-semester input:checked::after { content: none; }
  .ap-atlas-feature, .ap-semester { border-color: ButtonText; }
}

.question-audio{position:relative;display:inline-flex;align-items:center;gap:2px;flex-shrink:0;min-height:32px;font-size:13px;color:var(--muted)}
.question-audio .audio-listen,.question-audio .audio-parts-toggle{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:32px;padding:5px 9px;border:1px solid var(--line);border-radius:20px;background:var(--panel,#fff);color:var(--muted);font:inherit;cursor:pointer;white-space:nowrap}
.question-audio .audio-parts-toggle{border-color:transparent;padding:5px;min-width:28px;background:transparent}
.question-audio .audio-listen:hover,.question-audio .audio-listen[aria-pressed=true],.question-audio .audio-parts-toggle:hover{color:var(--accent,#7455d9);border-color:currentColor;background:color-mix(in srgb,var(--accent,#7455d9) 6%,var(--panel,#fff))}
.question-audio button:focus-visible{outline:2px solid var(--accent,#7455d9);outline-offset:3px}
.question-audio .audio-parts{position:absolute;top:calc(100% + 7px);right:0;z-index:40;width:max-content;max-width:min(290px,calc(100vw - 40px));padding:6px;border:1px solid var(--line);border-radius:14px;background:var(--panel,#fff);box-shadow:0 8px 28px #302b5c18}
.question-audio .audio-parts button{display:flex;align-items:center;gap:9px;width:100%;min-height:40px;padding:9px 12px;border:0;border-radius:9px;background:transparent;color:var(--ink,#24304a);font:inherit;text-align:left;cursor:pointer}
.question-audio .audio-parts button:hover,.question-audio .audio-parts button:focus-visible{background:color-mix(in srgb,var(--accent,#7455d9) 8%,var(--panel,#fff))}
.question-audio .audio-notice{position:absolute;top:calc(100% + 7px);right:0;z-index:39;width:220px;max-width:calc(100vw - 40px);padding:10px;border:1px solid var(--line);border-radius:10px;background:var(--panel,#fff);font-size:12px;box-shadow:0 4px 15px #302b5c12}
.question-meta-tools,.audio-heading{display:flex;align-items:center;gap:8px}.audio-heading{justify-content:space-between;gap:12px;margin-bottom:16px}.audio-heading>p{margin:0;min-width:0}.audio-heading .question-audio{margin-left:auto}
.narration-text{border-radius:8px;transition:background-color .15s,box-shadow .15s}.narration-text.is-narrating{background:color-mix(in srgb,var(--accent,#7455d9) 7%,transparent);box-shadow:0 0 0 6px color-mix(in srgb,var(--accent,#7455d9) 7%,transparent)}
.audio-spinner{animation:audio-spin 1s linear infinite}@keyframes audio-spin{to{transform:rotate(360deg)}}
@media(pointer:coarse){.question-audio,.question-audio .audio-listen,.question-audio .audio-parts-toggle{min-height:44px}.question-audio .audio-parts-toggle{min-width:36px}.question-audio .audio-parts button{min-height:44px}}
@media(prefers-reduced-motion:reduce){.audio-spinner{animation:none}.narration-text{transition:none}}
.question-audio [hidden]{display:none!important}
@media(max-width:580px){
  .page-question-meta:has(.question-audio){gap:8px}
  .page-question-meta:has(.question-audio) .question-meta-tools{gap:4px;flex-shrink:0}
  .page-question-meta:has(.question-audio) .question-topic-trigger{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:2px 4px}
  .page-question-meta:has(.question-audio) .question-topic-separator{display:none}
  .page-question-meta:has(.question-audio) .question-topic-chevron{grid-column:2;grid-row:1}
  .page-question-meta:has(.question-audio) .question-topic-name{grid-column:1 / -1;font-size:12px}
}

.estimate-number { appearance:none; display:inline-flex; align-items:baseline; gap:.24em; border:0; background:transparent; padding:0; margin:0; color:inherit; font:inherit; text-align:inherit; border-radius:6px; cursor:pointer; white-space:nowrap; font-variant-numeric:tabular-nums; }
.estimate-number .estimate-center { font:inherit; color:inherit; }
.estimate-number .estimate-margin[hidden] { display:none; }
.estimate-number[data-estimate-format="range"] .estimate-margin { font-size:.5em; min-width:10ch; }
.estimate-number .estimate-percent { font-size:.65em; }
.estimate-number .estimate-margin { display:inline-flex; align-items:center; justify-content:center; padding:4px 2px; margin:0; color:var(--muted,#737a94); font:600 .62em/1.3 Nunito,"Nunito Variable",sans-serif; font-variant-numeric:tabular-nums; letter-spacing:0; white-space:nowrap; min-height:28px; min-width:4ch; }
.estimate-number:hover, .estimate-number[aria-expanded="true"] { background:transparent; }
.estimate-number:focus-visible { outline:2px solid currentColor; outline-offset:3px; }
.estimate-help-popup { position:fixed; inset:auto; margin:0; z-index:1000; width:max-content; max-width:min(278px,calc(100vw - 24px)); box-sizing:border-box; padding:12px 15px; border:1px solid var(--border,#e8e1f4); border-radius:12px; background:var(--surface,#fff); color:var(--ink,#203553); box-shadow:0 6px 24px #30224518; font:500 14px/1.5 Nunito,"Nunito Variable",sans-serif; text-align:left; }
.preview-detail-value .estimate-margin, .range-value .estimate-margin, .range-subject-value .estimate-margin, .practice-topic-value .estimate-margin, .topic-range .estimate-margin, .profile-subject .estimate-margin, .continuous-progress li .estimate-margin { font-size:.83em; }
.preview-score-value .estimate-margin { font-size:.48em; }
.preview-score-value .estimate-percent { font-size:.65em; }
.preview-score-value > .estimate-number { font-size:1em; }
.continuous-progress .estimate-number { display:inline-flex; }
.landing-preview .preview-detail-value { display:flex; align-items:center; justify-content:flex-end; min-height:32px; }
.landing-preview .preview-detail-label { grid-template-columns:minmax(0,1fr) auto; }
.preview-detail-value .estimate-number[data-estimate-format="range"] .estimate-margin,
.range-value .estimate-number[data-estimate-format="range"] .estimate-margin,
.range-subject-value .estimate-number[data-estimate-format="range"] .estimate-margin,
.practice-topic-value .estimate-number[data-estimate-format="range"] .estimate-margin,
.practice-subject-value .estimate-number[data-estimate-format="range"] .estimate-margin,
.topic-range .estimate-number[data-estimate-format="range"] .estimate-margin,
.profile-subject .estimate-number[data-estimate-format="range"] .estimate-margin,
.continuous-progress li .estimate-number[data-estimate-format="range"] .estimate-margin { font-size:.75em; }
@media(pointer:coarse) { .estimate-number .estimate-margin { min-width:44px; min-height:44px; } }
@media(pointer:coarse) { .landing-preview .preview-detail-value { min-height:44px; } }