.dino-quiz{width:min(920px,100vw - 28px);box-shadow:var(--shadow-soft);background:#fff;border:1px solid #0d28541a;border-radius:28px;gap:18px;margin:0 auto;padding:18px;display:grid}.dino-quiz__header{gap:14px;display:grid}.dino-quiz__subject{color:#22815e;letter-spacing:.08em;text-transform:uppercase;margin:0 0 6px;font-size:.78rem;font-weight:1000}.dino-quiz h1{font-family:var(--font-display);letter-spacing:-.04em;margin:0;font-size:clamp(2rem,9vw,3.7rem);font-weight:950;line-height:.98}.dino-quiz__stats{flex-wrap:wrap;gap:8px;display:flex}.dino-quiz__stats span{color:#245985;background:#edf6ff;border-radius:999px;min-height:38px;padding:9px 12px;font-size:.82rem;font-weight:850}.dino-quiz__stats strong{color:var(--color-ink);margin-left:3px}.dino-quiz__progress{background:#e9eef5;border-radius:999px;height:10px;overflow:hidden}.dino-quiz__progress span{border-radius:inherit;background:var(--color-mint);height:100%;transition:width .22s;display:block}.dino-question{background:#e8f7ef;border-radius:22px;grid-template-rows:auto 1fr;margin:0;display:grid;position:relative;overflow:hidden}.dino-question__prompt{z-index:1;color:var(--color-ink);font-family:var(--font-display);text-align:center;margin:0;padding:16px 16px 12px;font-size:clamp(1.28rem,5vw,1.75rem);font-weight:950;position:relative}.dino-question__image-frame{aspect-ratio:16/10;background:#ccebe1;overflow:hidden}.dino-question img{object-fit:cover;width:100%;height:100%;display:block}.dino-choices{gap:10px;display:grid}.dino-question-layout{gap:12px;display:grid}.dino-choice{min-height:56px;color:var(--color-ink);cursor:pointer;font-family:var(--font-body);text-align:left;background:#fff;border:2px solid #0d28541a;border-radius:16px;justify-content:space-between;align-items:center;gap:10px;padding:12px 15px;font-size:.98rem;font-weight:900;transition:border-color .16s,transform .16s,background .16s;display:flex;box-shadow:0 5px #0d28540f}.dino-choice:hover:not(:disabled){border-color:#397df26b;transform:translateY(-2px)}.dino-choice:disabled{cursor:default}.dino-choice:disabled:not(.is-correct,.is-incorrect){opacity:.55}.dino-choice.is-correct{color:#125c3b;background:#e2f7ec;border-color:#2b9b69}.dino-choice.is-incorrect{color:#9e2941;background:#fff0f2;border-color:#dd5268}.dino-choice svg{flex:none;width:22px;height:22px}.dino-feedback{background:#f6f8fb;border-radius:20px;align-items:start;gap:12px;min-height:74px;padding:16px;display:grid}.dino-feedback.is-visible{background:#f1fbf6}.dino-feedback__heading{flex-wrap:wrap;align-items:baseline;gap:7px;font-size:1.05rem;display:flex}.dino-feedback__heading span{font-family:var(--font-display);font-weight:950}.dino-feedback__heading .is-correct{color:#187047}.dino-feedback__heading .is-incorrect{color:#ad3049}.dino-feedback p{color:var(--color-muted);margin:0;font-size:.95rem;font-weight:620;line-height:1.55}.dino-feedback__hint{text-align:center;align-self:center}.dino-quiz__primary{background:var(--color-coral);color:#fff;cursor:pointer;width:100%;min-height:54px;font-family:var(--font-body);border:0;border-radius:16px;justify-content:center;align-items:center;gap:9px;padding:12px 18px;font-size:.98rem;font-weight:950;transition:transform .16s,box-shadow .16s;display:inline-flex;box-shadow:0 7px #d94545}.dino-quiz__primary:hover{transform:translateY(-2px);box-shadow:0 9px #d94545}.dino-quiz__primary svg{width:21px;height:21px}.dino-quiz--complete{text-align:center;align-content:center;justify-items:center;min-height:min(680px,100vh - 104px)}.dino-complete__medallion{aspect-ratio:1;background:#fff;border:10px solid #dcf6e9;border-radius:50%;place-items:center;width:124px;font-size:4.5rem;display:grid;box-shadow:0 9px #2b9b692e}.dino-complete__score{color:var(--color-muted);margin:4px 0 0;font-weight:850;display:grid}.dino-complete__score strong{color:var(--color-ink);font-family:var(--font-display);font-size:clamp(4rem,18vw,7rem);line-height:.95}.dino-complete__message{max-width:520px;color:var(--color-muted);margin:0;font-size:1.08rem;font-weight:700;line-height:1.55}.dino-quiz--complete .dino-quiz__primary{max-width:280px}@media (width>=680px){.dino-quiz{gap:20px;padding:26px}.dino-quiz__header{grid-template-columns:minmax(0,1fr) auto;align-items:end}.dino-quiz__stats{justify-content:flex-end}.dino-question__prompt{padding:18px}.dino-question-layout{grid-template-columns:minmax(0,1.42fr) minmax(260px,.78fr);align-items:stretch}.dino-question__image-frame{aspect-ratio:auto;min-height:338px}.dino-choices{grid-template-rows:repeat(4,minmax(0,1fr));grid-template-columns:1fr;gap:12px}.dino-choice{min-height:64px;padding-inline:18px;font-size:1.05rem}.dino-feedback{grid-template-columns:minmax(0,1fr) auto;align-items:center;min-height:108px;padding:18px 20px}.dino-feedback__heading,.dino-feedback p{grid-column:1}.dino-feedback__hint{grid-column:1/-1}.dino-feedback .dino-quiz__primary{grid-area:1/2/3;width:auto;min-width:190px}}@media (prefers-reduced-motion:reduce){.dino-quiz__progress span,.dino-choice,.dino-quiz__primary{transition:none}}.science-lab{--lab-ink:var(--color-ink,#0d2854);--lab-muted:#586780;--lab-mint:#6fd3aa;--lab-mint-soft:#e7f8f1;--lab-sky:#68a9f7;--lab-sky-soft:#eaf4ff;--lab-coral:var(--color-coral,#ff6259);--lab-sun:#f6c85f;width:min(100% - 24px,1040px);color:var(--lab-ink);margin:0 auto;padding-bottom:64px}.science-lab button,.science-lab input{font:inherit}.science-lab__hero{box-shadow:var(--shadow-soft);background:linear-gradient(135deg,#fff,#f0f7ff 54%,#e9f9f2);border:1px solid #0d285417;border-radius:30px;align-items:center;gap:24px;padding:26px 20px;display:grid}.science-lab__hero>div:first-child{gap:13px;display:grid}.science-lab__hero p,.science-part__heading>p{color:#247756;letter-spacing:.08em;text-transform:uppercase;margin:0;font-size:.78rem;font-weight:950}.science-lab__hero h1{max-width:760px;font-family:var(--font-display);letter-spacing:-.05em;margin:0;font-size:clamp(2.55rem,10vw,5.4rem);line-height:.96}.science-lab__hero>div>span{max-width:720px;color:var(--lab-muted);font-size:clamp(1rem,4.3vw,1.23rem);font-weight:650;line-height:1.58}.science-lab__hero-mark{place-items:center;width:160px;height:160px;margin:0 auto;display:grid;position:relative}.science-lab__hero-mark i{border:2px dashed #0d285433;border-radius:50%;width:100%;height:46%;position:absolute;transform:rotate(0)}.science-lab__hero-mark i:nth-child(2){transform:rotate(60deg)}.science-lab__hero-mark i:nth-child(3){transform:rotate(120deg)}.science-lab__hero-mark strong{background:var(--lab-sun);width:58px;height:58px;font-family:var(--font-display);border-radius:50%;place-items:center;font-size:2rem;display:grid;box-shadow:0 8px #0d28541a}.science-part{border-bottom:2px dashed #0d28541f;padding:54px 0}.science-part__heading{gap:9px;margin-bottom:25px;display:grid}.science-part__heading h2{font-family:var(--font-display);letter-spacing:-.04em;margin:0;font-size:clamp(2rem,7vw,3.35rem);line-height:1}.science-part__heading>span{max-width:720px;color:var(--lab-muted);font-size:1.02rem;font-weight:650;line-height:1.58}.atom-builder,.motion-lab,.force-lab,.energy-lab{gap:16px;display:grid}.science-controls,.atom-stage,.motion-stage,.force-stage,.ramp-stage,.element-detail,.science-check{background:#fff;border:1px solid #0d28541a;border-radius:24px;box-shadow:0 8px #0d28540b}.science-controls{align-content:start;gap:0;padding:18px;display:grid}.particle-control,.force-control{border-bottom:1px dashed #0d285424;grid-template-columns:auto 1fr auto;align-items:center;gap:10px;padding:14px 0;display:grid}.particle-dot{border-radius:50%;width:14px;height:14px}.particle-dot.proton{background:#ef766e}.particle-dot.neutron{background:#8a96aa}.particle-dot.electron{background:var(--lab-sky)}.science-stepper{grid-template-columns:44px 36px 44px;align-items:center;gap:4px;display:grid}.science-stepper button{width:44px;height:44px;color:var(--lab-ink);cursor:pointer;background:#f5f8fc;border:1px solid #0d285421;border-radius:12px;place-items:center;display:grid}.science-stepper button:disabled{cursor:not-allowed;opacity:.35}.science-stepper output{text-align:center;font-weight:950}.science-readout{background:#f2f6fb;border-radius:16px;gap:10px;margin:18px 0 0;padding:14px;display:grid}.science-readout>div{justify-content:space-between;gap:14px;display:flex}.science-readout dt{color:var(--lab-muted);font-weight:750}.science-readout dd{text-align:right;margin:0;font-weight:950}.science-reset{background:var(--lab-ink);color:#fff;cursor:pointer;border:0;border-radius:13px;justify-self:start;align-items:center;gap:8px;min-height:44px;margin-top:14px;padding:0 15px;font-weight:900;display:inline-flex}.atom-stage{background:linear-gradient(160deg, var(--lab-sky-soft), #fff 55%, var(--lab-mint-soft));align-content:center;justify-items:center;min-height:440px;padding:18px;display:grid;overflow:hidden}.atom-diagram{width:min(100%,300px);height:auto;overflow:visible}.atom-shell{fill:none;stroke:#0d285436;stroke-width:1.5px;stroke-dasharray:4 5}.atom-nucleus{fill:var(--lab-sun)}.atom-nucleus-dot.proton{fill:#e95c57}.atom-nucleus-dot.neutron{fill:#75839a}.atom-electron{fill:#397df2;stroke:#fff;stroke-width:2px}.element-symbol{font-family:var(--font-display);margin-top:-12px;font-size:4.4rem;line-height:1}.element-name{color:var(--lab-muted);font-size:1.18rem;font-weight:850}.charge-tag{border-radius:999px;margin-top:10px;padding:7px 12px;font-size:.84rem;font-weight:950}.charge-tag.neutral{color:#176744;background:#dff6eb}.charge-tag.positive{color:#9c3b3f;background:#fff0ee}.charge-tag.negative{color:#245985;background:#e9f3ff}.element-legend{color:var(--lab-muted);flex-wrap:wrap;gap:8px 14px;margin-bottom:18px;font-size:.82rem;font-weight:780;display:flex}.element-legend span{align-items:center;gap:6px;display:inline-flex}.element-color{border-radius:4px;width:12px;height:12px}.element-grid{grid-template-columns:repeat(5,minmax(0,1fr));gap:7px;display:grid}.element-tile{aspect-ratio:1;color:#102847;cursor:pointer;border:2px solid #0000;border-radius:13px;align-content:center;justify-items:center;min-width:0;padding:5px;transition:transform .14s,border-color .14s,box-shadow .14s;display:grid}.element-tile:hover{transform:translateY(-2px)}.element-tile.is-selected{border-color:var(--lab-ink);box-shadow:0 5px #0d28542e}.element-tile>span{opacity:.7;place-self:start;font-size:.64rem;font-weight:850}.element-tile strong{font-family:var(--font-display);font-size:clamp(1.25rem,6vw,2rem);line-height:1}.element-tile small{text-overflow:ellipsis;white-space:nowrap;width:100%;font-size:.65rem;font-weight:750;display:none;overflow:hidden}.category-nonmetal{background:#8ee0bf}.category-noble{background:#c8b6e7}.category-alkali{background:#f6cf71}.category-alkaline{background:#efd793}.category-metalloid{background:#b7d89e}.category-halogen{background:#f4a49e}.category-post-transition{background:#d7d3c9}.element-detail{align-items:center;gap:17px;min-height:170px;margin-top:17px;padding:18px;display:grid}.element-detail__symbol{width:90px;height:90px;font-family:var(--font-display);border-radius:20px;place-items:center;font-size:2.7rem;display:grid;box-shadow:0 6px #0d28541a}.element-detail h3{font-family:var(--font-display);margin:0;font-size:1.8rem}.element-detail p{color:var(--lab-muted);margin:5px 0 0;font-weight:650;line-height:1.5}.element-detail dl{flex-wrap:wrap;gap:8px 18px;margin:12px 0 0;display:flex}.element-detail dl div{gap:5px;display:flex}.element-detail dt{color:var(--lab-muted);font-size:.76rem;font-weight:750}.element-detail dd{margin:0;font-size:.76rem;font-weight:950}.element-placeholder{text-align:center;grid-column:1/-1;margin:0}.science-checks{gap:14px;display:grid}.science-check{gap:14px;padding:19px;display:grid}.science-check__number{color:#247756;text-transform:uppercase;font-size:.76rem;font-weight:950}.science-check h3{font-family:var(--font-display);margin:0;font-size:clamp(1.35rem,5.5vw,1.9rem);line-height:1.12}.science-check__choices{gap:9px;display:grid}.science-check__choices button{min-height:52px;color:var(--lab-ink);cursor:pointer;text-align:left;background:#fff;border:2px solid #0d28541a;border-radius:15px;align-items:center;gap:10px;padding:9px 12px;font-weight:850;display:flex}.science-check__choices button>span{background:#edf2f8;border-radius:9px;flex:none;place-items:center;width:30px;height:30px;display:grid}.science-check__choices button.is-correct{background:#e4f8ef;border-color:#2cab78}.science-check__choices button.is-wrong{border-color:var(--lab-coral);background:#fff0ee}.science-check__feedback{border-radius:14px;align-items:flex-start;gap:9px;margin:0;padding:12px;font-weight:650;line-height:1.46;display:flex}.science-check__feedback svg{flex:none;margin-top:2px}.science-check__feedback.is-correct{color:#176744;background:#e4f8ef}.science-check__feedback.is-wrong{color:#8d3640;background:#fff0ee}.slider-controls{gap:17px}.slider-controls label{color:var(--lab-muted);grid-template-columns:1fr auto;gap:9px;font-weight:850;display:grid}.slider-controls label strong{color:var(--lab-ink)}.slider-controls input[type=range]{accent-color:#2cab78;cursor:pointer;grid-column:1/-1;width:100%}.formula-readout{background:var(--lab-mint-soft);border-radius:18px;gap:6px;padding:16px;display:grid}.formula-readout span{color:var(--lab-muted);font-size:.83rem;font-weight:800}.formula-readout strong{font-family:var(--font-display);font-size:2.2rem}.formula-readout code,.energy-formula code{color:#245985;font:800 1rem/1.4 ui-monospace,monospace}.motion-stage{background:linear-gradient(160deg,#f3f8ff,#fff);align-content:center;gap:17px;min-height:360px;padding:16px;display:grid;overflow:hidden}.motion-stage svg{width:100%;height:auto}.chart-axis{fill:none;stroke:var(--lab-ink);stroke-width:3px;stroke-linecap:round}.chart-grid{fill:none;stroke:#0d285414;stroke-width:1px}.motion-line{fill:none;stroke:#2cab78;stroke-width:8px;stroke-linecap:round}.motion-point{fill:var(--lab-coral);stroke:#fff;stroke-width:3px}.motion-stage text{fill:var(--lab-muted);font-size:16px;font-weight:800}.track{background:#dfe6ee;border-radius:999px;height:12px;position:relative}.track span{border-radius:inherit;background:var(--lab-sky);position:absolute;inset:0 auto 0 0}.track i{font-size:2rem;font-style:normal;position:absolute;bottom:4px;right:-14px;transform:translate(50%)}.force-control{grid-template-columns:1fr auto}.force-stage{background:linear-gradient(160deg,#fff8df,#fff 55%,#eaf4ff);grid-template-columns:minmax(54px,1fr) auto minmax(54px,1fr);align-content:center;align-items:center;gap:4px;min-height:330px;padding:18px;display:grid}.force-block{background:var(--lab-ink);color:#fff;border-radius:18px;place-items:center;width:82px;height:82px;font-weight:950;display:grid;box-shadow:0 8px #0d28542e}.force-arrow{background:var(--lab-coral);max-width:100%;height:14px;position:relative}.force-arrow.left{justify-self:end}.force-arrow.right{background:var(--lab-sky);justify-self:start}.force-arrow.left:before{content:"";border-style:solid;border-width:14px 14px 14px 0;border-color:transparent var(--lab-coral) transparent transparent;position:absolute;top:-7px;left:-13px}.force-arrow.right:after{content:"";border-style:solid;border-width:14px 0 14px 14px;border-color:transparent transparent transparent var(--lab-sky);position:absolute;top:-7px;right:-13px}.force-arrow span{width:max-content;font-size:.77rem;font-weight:950;position:absolute;bottom:21px}.force-arrow.left span{right:0}.force-arrow.right span{left:0}.net-result{background:var(--lab-sky-soft);color:#245985;text-align:center;border-radius:14px;grid-column:1/-1;margin-top:44px;padding:12px;font-weight:950}.net-result.balanced{background:var(--lab-mint-soft);color:#176744}.ramp-stage{background:linear-gradient(#eaf4ff,#fff9e7);align-content:center;min-height:360px;padding:14px;display:grid}.ramp-stage svg{width:100%;height:auto}.ramp-ground{stroke:var(--lab-ink);stroke-width:5px;stroke-linecap:round}.ramp-line{stroke:#6c7a8e;stroke-width:13px;stroke-linecap:round}.ramp-ball{fill:var(--lab-coral);stroke:#fff;stroke-width:4px}.ramp-stage text{fill:var(--lab-ink);text-anchor:middle;font-size:16px;font-weight:950}.height-line{stroke:#2cab78;stroke-width:4px;stroke-dasharray:6 6}.energy-formula{background:#fff;border-radius:17px;justify-content:space-between;align-items:center;gap:12px;padding:14px;display:flex}.energy-formula strong{font-family:var(--font-display);font-size:1.8rem}.science-safety{background:#fff7d8;border-radius:20px;margin-top:32px;padding:19px}.science-safety strong{font-family:var(--font-display);font-size:1.2rem}.science-safety p{color:#5e5135;margin:7px 0 0;font-weight:650;line-height:1.55}.science-sources{flex-wrap:wrap;gap:8px 16px;margin-top:14px;display:flex}.science-sources a{color:#52627c;text-underline-offset:3px;font-size:.76rem;font-weight:750;text-decoration:underline}@media (width>=660px){.science-lab{width:min(100% - 40px,1040px)}.science-lab__hero{grid-template-columns:minmax(0,1fr) 190px;padding:44px}.science-part{padding:70px 0}.atom-builder,.motion-lab,.force-lab,.energy-lab{grid-template-columns:minmax(280px,.82fr) minmax(0,1.18fr);gap:20px}.science-controls{padding:22px}.element-grid{grid-template-columns:repeat(10,minmax(0,1fr))}.element-tile small{display:block}.element-detail{grid-template-columns:auto 1fr;padding:22px}.science-check__choices{grid-template-columns:repeat(3,minmax(0,1fr))}}@media (prefers-reduced-motion:reduce){.element-tile{transition:none}}.lesson-page[data-astro-cid-uojqowuj]{min-height:100vh;padding:12px 0 48px}.lesson-nav[data-astro-cid-uojqowuj]{margin-bottom:8px}.back-link[data-astro-cid-uojqowuj]{color:#172033c2;width:44px;height:44px;box-shadow:var(--shadow-card);background:#ffffffd1;border-radius:999px;place-items:center;display:inline-grid}.back-link[data-astro-cid-uojqowuj] svg[data-astro-cid-uojqowuj]{fill:none;stroke:currentColor;stroke-width:2.4px;stroke-linecap:round;stroke-linejoin:round;width:24px;height:24px}.coming-soon[data-astro-cid-uojqowuj]{justify-items:start;gap:18px;max-width:760px;padding:clamp(24px,5vw,42px);display:grid}.subject-page[data-astro-cid-uojqowuj]{gap:18px;max-width:860px;padding:clamp(20px,5vw,38px);display:grid}.topic-grid[data-astro-cid-uojqowuj]{gap:12px;display:grid}.topic-card[data-astro-cid-uojqowuj]{grid-template-columns:auto minmax(0,1fr);align-items:center;gap:14px;padding:14px;transition:transform .16s,border-color .16s;display:grid}.topic-card[data-astro-cid-uojqowuj]:hover{border-color:#4c9aff5c;transform:translateY(-2px)}.topic-card[data-astro-cid-uojqowuj]>span[data-astro-cid-uojqowuj]{color:#245985;width:58px;height:58px;font-family:var(--font-display);background:#4c9aff24;border-radius:8px;place-items:center;font-weight:1000;display:grid}.topic-card[data-astro-cid-uojqowuj] h2[data-astro-cid-uojqowuj]{font-family:var(--font-display);margin:0;font-size:clamp(1.45rem,6vw,2rem);line-height:1.05}.topic-card[data-astro-cid-uojqowuj] p[data-astro-cid-uojqowuj]{margin-top:6px;font-size:.96rem;line-height:1.42}.soon-visual[data-astro-cid-uojqowuj]{aspect-ratio:16/10;background:#fff;border-radius:8px;width:min(100%,360px);position:relative;overflow:hidden;box-shadow:inset 0 0 0 2px #17203314}.soon-visual[data-astro-cid-uojqowuj] img[data-astro-cid-uojqowuj]{object-fit:cover;width:100%;height:100%;display:block}.soon-visual[data-astro-cid-uojqowuj] span[data-astro-cid-uojqowuj]{color:var(--color-ink);font-family:var(--font-display);background:#ffffffe0;border-radius:999px;padding:7px 10px;font-size:.9rem;font-weight:1000;position:absolute;bottom:12px;right:12px}.soon-pill[data-astro-cid-uojqowuj]{color:#245985;background:#4c9aff24;border-radius:999px;padding:8px 12px;font-weight:1000}h1[data-astro-cid-uojqowuj]{font-family:var(--font-display);letter-spacing:0;margin:0;font-size:clamp(2.5rem,8vw,5.2rem);line-height:.96}p[data-astro-cid-uojqowuj]{color:#172033b8;max-width:650px;margin:0;font-size:1.12rem;line-height:1.6}.soon-note[data-astro-cid-uojqowuj]{border-left:6px solid var(--color-sun);padding-left:16px;font-weight:800}.home-link[data-astro-cid-uojqowuj]{background:var(--color-ink);color:#fff;border-radius:999px;justify-content:center;align-items:center;min-height:48px;padding:0 18px;font-weight:1000;display:inline-flex}