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0 24px;line-height:1.4;letter-spacing:-.025em}.answer{background:#15263a;border-color:#354a63;padding:14px;color:#e8f1fb;min-height:58px;font-size:.9375rem}.answer-key{background:#293e56;color:#b9d2e7;flex-shrink:0;font-size:.875rem}.answer:not(:disabled):hover{background:#213c51;border-color:#87d0e4}.answer.correct{background:#163e37;border-color:#83d9a1;color:#d4ffe3}.answer.incorrect{background:#422630;border-color:#ed8b95;color:#ffe1e5}.answer:disabled:not(.correct):not(.incorrect){opacity:.6}.feedback{background:#173c34;border-color:#82d8a1;padding:20px}.feedback.wrong{background:#382a35;border-color:#e9929b}.feedback p{color:#d2e1ed;font-size:.9375rem;margin:12px 0 18px}.answer-hint{margin:20px 0 0}.game-wrap{max-width:880px}.result-panel{margin-top:28px}.result-big{font-size:5rem}.result-big small{font-size:1.4rem}.review-item .tag{line-height:1.6}.worksheet-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;max-width:950px;margin:34px 0}.worksheet-card{border:1px solid #334c61;border-radius:20px;padding:30px;background:#12253a;position:relative;overflow:hidden}.sheet-number{font-size:5rem;color:#5687a840;position:absolute;right:20px;top:0;font-weight:800;letter-spacing:-.07em}.worksheet-card>.tag,.worksheet-card>h3{position:relative}.worksheet-card h3{font-size:1.8rem;margin:28px 0 12px}.worksheet-card>.meta{display:block;margin:20px 0}.worksheet-library{display:grid;grid-template-columns:1fr 1fr;gap:14px}.library-row{display:flex;align-items:center;gap:20px;text-decoration:none;padding:24px;background:#102135;border:1px solid #293f55;border-radius:16px}.library-row:hover{border-color:#82c4d6}.library-row>.symbol{color:#99d6e7;width:40px;flex-shrink:0}.library-row>div{flex:1}.library-row h3{margin-bottom:7px;font-size:1.05rem}.library-row .tag{white-space:nowrap}.worksheet-toolbar{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:24px;flex-wrap:wrap}.worksheet-toolbar .top-link{margin:0}.worksheet-page{max-width:1000px;margin:auto}.worksheet-paper{background:#fff;color:#172b3b;border-radius:10px;padding:50px;color-scheme:light;box-shadow:0 20px 80px #0003}.worksheet-paper p{color:#405265}.worksheet-paper .overline{color:#506c7e}.paper-brand{font-weight:800;font-size:1.5rem;letter-spacing:-.06em;border-bottom:2px solid #172b3b;padding-bottom:18px;margin-bottom:34px;display:flex;align-items:center;justify-content:space-between}.paper-brand span{font-size:.75rem;letter-spacing:.13em;font-weight:500}.worksheet-paper h1{font-size:2.8rem}.paper-details{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin:28px 0}.worksheet-paper input,.worksheet-paper textarea{background:#f8fafc;color:#172b3b;border:1px solid #c0ced8}.worksheet-question{padding:28px 0;border-top:1px solid #cdd6df;break-inside:avoid}.worksheet-question h2{font-size:1.15rem;letter-spacing:-.02em;line-height:1.5}.worksheet-question fieldset{border:0;padding:0;margin:20px 0}.worksheet-choice{display:flex;align-items:center;gap:12px;margin:10px 0;line-height:1.6}.worksheet-choice input{width:18px;height:18px;min-height:18px;margin:0;flex-shrink:0;accent-color:#235975}.worksheet-question textarea{min-height:115px;line-height:1.7}.worksheet-question textarea[rows='9']{min-height:220px}.solution{border-left:3px solid #1c6b68;background:#eaf6f3;padding:20px;margin-top:20px;font-size:.9375rem}.solution p{margin:8px 0 0}.paper-footer{font-size:.875rem;border-top:1px solid #bdcbd6;padding-top:20px}.print-response{display:none;white-space:pre-wrap;overflow-wrap:anywhere}.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}:focus-visible{outline-color:#a1e6fc!important}.worksheet-paper :focus-visible{outline-color:#156c88!important}
@keyframes slip{from{left:var(--from-x);top:var(--from-y);transform:translate(-50%,-50%) rotate(-7deg)}to{left:var(--x);top:var(--y);transform:translate(-50%,-50%) rotate(0)}}
@keyframes final-fall{0%{left:var(--from-x);top:var(--from-y);opacity:1;transform:translate(-50%,-50%) rotate(0)}70%{opacity:1}100%{left:var(--x);top:var(--y);opacity:0;transform:translate(-50%,-50%) rotate(70deg) scale(.6)}}
@media(min-width:1500px){main{padding-top:48px}.expedition-card{min-height:370px}}
@media(max-width:1100px){.dash{grid-template-columns:minmax(0,1fr) 250px}.subject-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.expedition-copy{padding-left:24px}.expedition-copy h2{font-size:2.65rem}.expedition-card{grid-template-columns:1.15fr 1fr}.expedition-copy .btn{font-size:.875rem;padding:13px 15px}.question-card{padding:24px}.library-row{padding:20px;gap:14px}.library-row .tag{display:none}}
@media(max-width:800px){.dash{grid-template-columns:1fr}.dash aside{display:grid;grid-template-columns:1fr 1fr;gap:16px}.side-card{margin:0}.survival-layout{grid-template-columns:1fr}.survival-stage{position:relative;top:0;display:grid;grid-template-columns:1fr 1fr}.game-hud{grid-column:1/-1;padding:14px 20px}.survival-stage .ice-scene{aspect-ratio:3/2}.stage-caption{display:flex;flex-direction:column;justify-content:center;border-top:0;padding:20px;text-align:left}.subject-launch{grid-template-columns:1fr 1fr}.worksheet-library{grid-template-columns:1fr}.subject-launch .ice-scene{align-self:center}.worksheet-link-panel{align-items:start;flex-direction:column}.session-badge{display:none}.site-header nav{gap:18px}.worksheet-paper{padding:30px}.question-card h1{font-size:1.4rem}}
@media(max-width:600px){main{padding:28px 18px 50px}.site-header{padding:20px 18px;gap:20px}.site-header nav{flex-wrap:wrap;justify-content:flex-start;gap:16px 21px;font-size:.875rem}.site-header nav a:last-child{margin-left:auto}.nav-plan{padding:6px 12px}.intro-row h1{font-size:2.6rem}.expedition-card{grid-template-columns:1fr;min-height:0}.expedition-copy{padding:26px;align-items:start}.expedition-copy h2{font-size:3rem}.expedition-copy p{max-width:66%;margin-bottom:22px}.expedition-card .ice-scene{position:absolute;right:0;top:0;width:50%;height:100%;opacity:.85;pointer-events:none}.expedition-copy>.tag{font-size:.7rem}.expedition-copy>.meta{max-width:65%;font-size:.875rem}.expedition-copy>.btn{position:relative}.expedition-card .penguin{width:30%;top:43%!important;left:58%!important}.expedition-card .ice-scene:after{background:linear-gradient(90deg,#0a1c31,transparent 55%)}.subject-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.subject-main{padding:17px 15px}.subject h3{font-size:1rem}.subject-bottom{padding:12px;gap:5px}.subject-bottom a,.subject-bottom button{font-size:.875rem}.section-title{align-items:start}.section-title>.tag{display:none}.subject-group{font-size:.75rem}.subject-tools{flex-direction:column;align-items:stretch}.subject-tools select{max-width:100%}.dash aside{grid-template-columns:1fr}.subject-launch,.worksheet-grid{grid-template-columns:1fr}.subject-launch>.ice-scene{display:none}.game-top h2{font-size:1.2rem}.game-top .overline{font-size:.7rem}.game-top .btn{flex-shrink:0}.game-top{gap:12px}.survival-layout{gap:16px}.stage-caption strong{font-size:.9375rem}.stage-caption p{font-size:.875rem}.stage-caption{padding:16px 12px}.scene-label{font-size:.65rem;bottom:12px;letter-spacing:.08em}.survival-stage .penguin{width:21%}.game-hud{padding:12px 18px}.question-card{padding:23px 18px}.answer{padding:13px;gap:12px;font-size:.9375rem}.feedback{padding:17px}.worksheet-paper{padding:24px 18px}.worksheet-paper h1{font-size:2.15rem}.paper-details{grid-template-columns:1fr}.paper-brand{gap:20px;font-size:1.35rem}.worksheet-toolbar .actions{width:100%}.worksheet-toolbar .actions .btn{flex:1}.plan .price{font-size:2.5rem}.worksheet-card{padding:26px}.site-footer .brand{font-size:1.5rem}.library-row{padding:20px 16px}.worksheet-question h2{font-size:1.1rem}.subject-heading .symbol{display:none}}
@media(prefers-reduced-motion:reduce){.slipping,.fallen .slipping{animation:none!important}.fallen .penguin{opacity:0}.subject:hover,.btn:hover{transform:none}}
@media print{:root{color-scheme:light;background:white;color:#172b3b}body{background:white;color:#172b3b}.worksheet-page{max-width:none}.worksheet-paper{box-shadow:none;border-radius:0;padding:0}.worksheet-paper h1{font-size:24pt}.worksheet-paper h2{font-size:13pt}.worksheet-paper textarea{display:none}.print-response{display:block;min-height:100px;border-bottom:1px solid #a9b4c0;line-height:1.8;padding:8px 0}.print-response.extended{min-height:180px}.worksheet-question{break-inside:avoid}.paper-brand{margin-bottom:22px}.worksheet-paper .overline{color:#435366}.worksheet-paper input{border:0;background:white;color:#111}.paper-details{display:grid;grid-template-columns:1fr 1fr}.solution{print-color-adjust:exact}.panel,.day-card{background:white;color:#172b3b}.panel p,.day-card p{color:#405265}.kit-layout textarea,.kit-layout input{color:#172b3b;background:white}.paper-footer{color:#435366}}