:root{font-family:system-ui,sans-serif;color:#23364d;background:#f4f6fb;font-size:18px}*{box-sizing:border-box}body{margin:0}header{display:flex;align-items:center;gap:24px;padding:22px 5%;background:white;border-bottom:1px solid #e0e5ef}header span{flex:1;color:#718096;font-size:.85rem}.brand{font-weight:800;color:#23364d;text-decoration:none;font-size:1.3rem}main{max-width:1100px;margin:auto;padding:30px 24px}button,.button{font:inherit;cursor:pointer;min-height:52px;border:1px solid #dce2ef;border-radius:14px;background:white;color:#23364d;padding:12px 20px;font-weight:650}button:hover{border-color:#697be6;background:#eef0ff}button:focus-visible,input:focus-visible{outline:3px solid #ffb74f;outline-offset:3px}button:disabled{opacity:.5;cursor:default}.primary{background:#5869df;color:white;border-color:#5869df}.primary:hover{background:#4556c9}h1{font-size:2rem;letter-spacing:-.05em;margin:10px 0}h2{font-size:1.3rem}.muted{color:#718096}.hero{display:flex;align-items:center;gap:32px;background:#e7ecff;border-radius:26px;padding:30px;margin-bottom:30px}.hero img{width:125px}.hero p{margin:10px 0;line-height:1.6}.tag{display:inline-block;font-size:.72rem;font-weight:750;text-transform:uppercase;letter-spacing:.1em;color:#5869df}.grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}.card{background:white;border:1px solid #e1e5ee;border-radius:22px;padding:25px}.card p{line-height:1.6}.card button{width:100%;margin-top:18px}.tools{display:flex;flex-wrap:wrap;gap:12px;margin:25px 0}.study{max-width:750px;margin:auto}.study-top{display:flex;justify-content:space-between;align-items:center;gap:15px}progress{width:100%;height:12px;accent-color:#6575df;margin:20px 0}.question{text-align:center;min-height:120px;display:grid;place-content:center;font-size:1.6rem;font-weight:700}.answers{display:grid;grid-template-columns:1fr 1fr;gap:12px}input{font:inherit;padding:16px;border:2px solid #dce2ef;border-radius:14px;width:100%;min-height:58px;background:white}input[type=checkbox]{width:24px;min-height:24px}.keypad{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:15px auto;max-width:420px}.keypad button{font-size:1.3rem}.feedback{padding:18px;border-radius:15px;background:#eef1ff;margin:18px 0;line-height:1.6}.success{background:#e1f4ea}.cards{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0}.sentence{min-height:70px;background:#f4f6fb;border:2px dashed #bdc7df;border-radius:14px;padding:12px}dialog{border:0;border-radius:22px;padding:30px;max-width:650px;width:90%;max-height:85vh}dialog::backdrop{background:#23364d88}label{display:flex;align-items:center;gap:12px;margin:20px 0}.error{color:#a13036;white-space:pre-wrap}footer{margin-top:25px;font-size:.85rem;color:#718096}.celebrate{animation:bob .5s ease-in-out 2}@keyframes bob{50%{transform:translateY(-8px)}}body.no-motion *{animation:none!important;transition:none!important}@media(max-width:650px){header{gap:10px;padding:15px}header span{display:none}.brand{font-size:1.05rem}header button{font-size:.8rem;padding:10px}main{padding:20px 15px}.hero{padding:20px;gap:15px}.hero img{width:80px}h1{font-size:1.5rem}.grid{grid-template-columns:1fr}.question{font-size:1.3rem}.card{padding:20px}}
@media(min-width:700px) and (max-height:850px){header{padding:12px 5%}main{padding-top:14px;padding-bottom:14px}.study progress{margin:10px 0;height:8px}.study .card{padding:20px}.study .question{min-height:65px;font-size:1.4rem;margin:10px 0}.study .keypad{grid-template-columns:repeat(6,1fr);max-width:540px;margin:10px auto}.study .feedback{margin:10px 0;padding:12px}.study input{min-height:52px;padding:12px}.study>p{margin:10px 0}}
textarea{display:block;width:100%;margin:20px 0;padding:12px;border:1px solid #dce2ef;border-radius:12px;font:14px ui-monospace,monospace;resize:vertical}.button{display:inline-flex;text-decoration:none;align-items:center}
.mascot{position:relative;flex-shrink:0;width:125px}.mascot img{display:block;width:100%}.mascot-thumb{display:none;position:absolute;right:-18px;top:22px;font-size:48px;line-height:1;filter:drop-shadow(0 3px 2px #23364d22)}.mascot.cheering .mascot-thumb{display:block;animation:thumb-pop .55s ease-out}.mascot.cheering img{animation:pinguino-cheer .65s ease-in-out 3;transform-origin:50% 85%}.study-companion{display:flex;align-items:center;gap:22px;margin:0 0 14px;color:#5869df}.study-companion .mascot{width:58px}.study-companion .mascot-thumb{font-size:34px;right:-15px;top:5px}.study-companion p{margin:0;font-size:.85rem}@keyframes pinguino-cheer{25%{transform:translateY(-7px) rotate(-7deg)}75%{transform:translateY(-7px) rotate(7deg)}}@keyframes thumb-pop{0%{transform:scale(.2) rotate(-25deg)}65%{transform:scale(1.2) rotate(8deg)}100%{transform:scale(1)}}@media(max-width:650px){.hero .mascot{width:80px}.hero .mascot-thumb{font-size:34px;right:-12px}}@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}} 
.stats-row{display:flex;gap:12px;flex-wrap:wrap;margin:20px 0}.metric{flex:1;min-width:90px;padding:12px;background:#f3f5fc;border-radius:14px;display:flex;flex-direction:column;gap:4px}.metric strong{font-size:1.45rem;color:#4556c9}.metric span{font-size:.78rem;color:#64748b}.hero .metric{background:#ffffff99}.package-card progress{margin:8px 0}.package-card button{margin-top:12px}.round-position{flex:1;text-align:center;font-weight:650}.time-chip{font-variant-numeric:tabular-nums;background:#e7ecff;padding:10px 14px;border-radius:12px;white-space:nowrap}.study-companion{margin:0 0 10px;gap:18px}.study .card button{margin-top:0;width:auto}.study .answers button,.study .keypad button{width:100%}.exercise-card>.unknown{display:block;width:100%;margin-top:12px;font-weight:500;color:#64748b;background:#f4f6fb}.exercise-card .primary{width:100%;margin-top:12px}.solution{font-size:1.2rem;font-weight:650;margin:6px 0!important}details summary{cursor:pointer;min-height:48px;display:flex;align-items:center;gap:8px;font-weight:650;color:#5869df}details summary::before{content:'＋'}details[open]>summary::before{content:'−'}details>p{margin-top:0}.explanation{background:#f4f6fb;border-radius:12px;padding:0 14px;margin:10px 0}.answer-time{font-size:.8rem;color:#718096;margin:10px 0}.statistics-section{border-top:1px solid #e1e5ee;padding:12px 0}.round-review{background:white;border-radius:18px;padding:10px 20px}.round-review section{border-top:1px solid #e1e5ee;padding:10px 0}.exercise-card .question{min-height:85px}.hero .primary{margin-top:6px}@media(min-width:700px) and (max-height:850px){.study-companion{position:absolute;right:24px;top:108px}.study-companion>.tag{display:none}.study-companion .mascot{width:45px}.study .stats-row{margin:10px 0}.study .question{min-height:50px}.exercise-card>.unknown{margin-top:8px}.exercise-card .primary{margin-top:8px}.exercise-card .feedback{margin:8px 0}.exercise-card .explanation{margin:6px 0}}@media(max-width:650px){.metric{min-width:70px;padding:9px}.metric strong{font-size:1.2rem}.stats-row{gap:8px}.study-top button{padding:10px}.time-chip{padding:10px}.study-companion .mascot{width:45px}}
.new-badge{display:inline-flex;align-items:center;background:#e0f3e9;color:#226747;border-radius:20px;padding:5px 10px;font-size:.75rem;font-weight:750;white-space:nowrap}.package-card{position:relative}.package-card>.new-badge{float:right}.hero .mascot{width:155px}.hero .mascot img{width:100%}.mascot-thumb{font-size:32px;right:-6px;top:30px}.study-companion .mascot{width:85px}.study-companion .mascot-thumb{font-size:24px;right:-4px;top:14px}@media(max-width:650px){.hero .mascot{width:105px}.hero .mascot-thumb{font-size:25px;right:-4px;top:20px}.study-companion .mascot{width:68px}.study-companion .mascot-thumb{font-size:20px;right:-3px;top:12px}.study-top{gap:8px;flex-wrap:wrap}}@media(min-width:700px) and (max-height:850px){.study-companion .mascot{width:72px}.study-companion .mascot-thumb{font-size:21px;right:-3px;top:12px}}
.answers{gap:22px}.keypad{gap:16px}.cards,.sentence{display:flex;flex-wrap:wrap;gap:16px}.sentence{margin-bottom:22px}.tools{gap:20px}.answer-actions{display:flex;justify-content:space-between;align-items:center;gap:48px;margin:26px 0}.study .answer-actions button{margin:0;width:auto;min-width:130px}.answer-actions .unknown{margin-left:auto;color:#64748b;background:#f4f6fb;font-weight:500}.exercise-card .feedback{margin:24px 0}.solution-answer{text-decoration-thickness:3px;text-underline-offset:5px}.correction{background:#fff4df}.mission{background:#e0f3e9;border-radius:20px;padding:20px 24px;margin-bottom:26px;display:flex;flex-wrap:wrap;gap:12px;align-items:center}.mission span{flex:1;min-width:180px}.mission progress{margin:0;height:10px}.library-package{border-top:1px solid #e1e5ee;padding:18px 0}.library-package p{margin:8px 0}.library-package button{margin-top:12px}.package-card .metric{min-width:110px}@media(max-width:650px){.answer-actions{gap:28px}.study .answer-actions button{min-width:0;padding:14px 16px}.answers{gap:18px}.cards,.sentence{gap:14px}.time-chip{font-size:.8rem}.study-top .round-position{order:3;flex-basis:100%}.package-card .metric{min-width:100px}}@media(min-width:700px) and (max-height:850px){.study-companion{position:static}.study .keypad{gap:14px}.exercise-card .feedback{margin:20px 0}}
.brand{display:inline-flex;align-items:center;gap:10px}.brand img{width:44px;height:44px}.journey-banner{display:flex;align-items:center;justify-content:space-between;gap:24px;background:linear-gradient(110deg,#fff1d6,#fff8eb);border:1px solid #f0ddb8;border-radius:22px;padding:22px 26px;margin-bottom:24px}.journey-banner h2{margin:8px 0}.journey-banner p{margin:0;line-height:1.6}.journey-top{display:flex;gap:24px;align-items:center;margin-bottom:24px}.journey-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin:24px 0}.journey-intro{align-items:flex-start}.journey-intro>div:last-child{min-width:0;flex:1}.journey-intro details p{max-width:650px}.trophy-card{margin-top:24px}.award{display:inline-block;padding:12px 16px;border-radius:14px;background:#fff1d6;margin:8px 12px 8px 0;font-weight:650}.training-reward{color:#226747;font-weight:650}.hero button+button{margin-left:18px}.library-package>.new-badge{float:right}.chest-card button{margin-top:18px}.journey-grid .muted{font-size:.85rem}@media(max-width:650px){.brand img{width:34px;height:34px}.brand{gap:7px}.journey-banner{flex-direction:column;align-items:flex-start;padding:20px;gap:20px}.journey-banner button{width:100%}.journey-top{flex-direction:column;align-items:flex-start;gap:14px}.journey-grid{grid-template-columns:1fr}.journey-intro{flex-direction:column}.hero button+button{margin:18px 0 0}.journey-intro .mascot{width:95px}}
/* Equipment is attached to the companion and follows its animation. */
.mascot{position:relative}.mascot-outfit{position:absolute;inset:0;pointer-events:none}.mascot-outfit span{position:absolute;font-size:2.3rem}.gear-rope{left:6%;top:53%}.gear-lantern{right:2%;top:50%}.gear-boots{left:40%;bottom:2%}.gear-scarf{left:40%;top:33%}.gear-star{right:33%;top:57%}.broken{filter:grayscale(1)}
.study-companion .mascot-outfit span{font-size:1.4rem}.gear-scarf{z-index:2}.mascot.cheering .mascot-outfit{animation:pinguino-cheer .65s ease-in-out 3}
.answers button.selected-wrong{background:#fff0f0;color:#a21f29;border:2px solid #c53939;opacity:1}.answers button.selected-correct{background:#e1f4ea;color:#157040;border:2px solid #157040;opacity:1}.answer-wrong .sentence button{background:#fff0f0;color:#a21f29}.answer-correct .sentence button{background:#e1f4ea;color:#157040}
.feedback.correction{background:#fff0f0;border:2px solid #c53939;color:#a21f29}.solution{color:#157040;font-weight:700}.answer-wrong input{border-color:#c53939;background:#fff0f0}.answer-correct input{border-color:#157040;background:#edf9f0}.answer-actions{gap:2rem}form label{display:grid;gap:.5rem;margin:1rem 0}select,textarea{width:100%;padding:.8rem;font:inherit}header{flex-wrap:wrap;gap:1rem}

.mascot>svg{display:block;width:100%;height:auto;overflow:visible}.mascot.cheering>svg{animation:pinguino-cheer .65s ease-in-out 3;transform-origin:50% 85%}.equipment-row{display:flex;align-items:center;gap:14px}.equipment-icon{display:inline-block;width:44px;flex-shrink:0}.equipment-icon svg{display:block;width:100%;height:49px}

.task-plan{display:block;width:100%;max-height:520px;object-fit:contain;margin:18px auto;background:#fff;border:1px solid #dce2ef;border-radius:14px}.division-heading{font:700 1.5rem ui-monospace,monospace}.division-step label{display:block;margin:16px 0 8px}.division-step input{max-width:220px}.division-history p{padding:10px;border-radius:10px}.written-solution p{font:1rem ui-monospace,monospace;line-height:1.6;margin:8px 0}

.division-layout{font:600 1.4rem/1.45 ui-monospace,SFMono-Regular,Consolas,monospace;font-variant-numeric:tabular-nums;white-space:pre;overflow:auto;margin:12px 0;padding:14px;background:#f4f6fb;border-radius:12px}.written-solution .division-layout{background:#ffffffaa;font-size:1.15rem}

.division-fields{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.division-fields label{font-size:.85rem;min-height:40px}.division-fields input{width:100%}.division-layout{font-size:1.15rem;line-height:1.3}@media(max-width:550px){.division-fields{grid-template-columns:1fr;gap:8px}.division-fields label{min-height:0}}

.plan-dialog{max-width:1200px;width:96vw}.plan-dialog .task-plan{max-height:none}
[hidden]{display:none!important}
.lesson-card{margin:24px 0}.lesson-card>p{max-width:65ch}.lesson-card>.primary{width:auto}
.lesson-stage{border-top:1px solid #dce2ef;margin-top:24px;padding-top:24px}.lesson-stage>.primary{width:auto;margin-top:16px}.lesson-stage>p{max-width:65ch}
.study .card>.lesson-help{display:block;width:100%;margin-top:24px;background:#e7ecff;color:#4556c9;min-height:56px}
#admin>.card{margin:24px 0}.print-codes .card{font:700 1.2rem ui-monospace,monospace;letter-spacing:.08em}@media print{body:has(.print-codes) header,body:has(.print-codes) main>*{display:none!important}body:has(.print-codes) main>.card:has(.print-codes){display:block!important}body:has(.print-codes) main>.card:has(.print-codes)>*:not(.print-codes){display:none!important}.print-codes{display:block!important}.print-codes .card{break-inside:avoid}}

.division-sheet{--division-cell:52px;display:grid;gap:8px 0;align-items:center;overflow-x:auto;padding:18px 10px;background-color:#f8faff;background-image:linear-gradient(#dce5f055 1px,transparent 1px),linear-gradient(90deg,#dce5f055 1px,transparent 1px);background-size:var(--division-cell) var(--division-cell);border-radius:14px;font:600 1.3rem ui-monospace,Consolas,monospace}.division-sheet input{width:100%;min-width:0;padding:7px 0;min-height:52px;text-align:center;border-radius:7px;font:inherit}.division-print{text-align:center}.division-rule{border-bottom:2px solid #526477;height:4px}.division-sheet input:focus{background:#fff7df}.written-solution .division-layout{font-size:1.3rem}

.reading-text{background:#f4f6fb;border-left:4px solid #697be6;border-radius:10px;padding:16px 20px;margin-bottom:18px;font-size:1rem;line-height:1.65;white-space:pre-line}.reading-text p{margin:8px 0 0}

.inventory-card{grid-column:1/-1}.inventory-card h2{margin-top:0}

/* Main administrator navigation */
.admin-tabs{display:flex;flex-wrap:wrap;gap:16px;margin:24px 0}.admin-tabs button{margin:0;min-height:56px;padding:14px 24px;background:#fff;color:#4556c9;border:2px solid #cbd3ee}.admin-tabs button[aria-selected="true"]{background:#5869df;color:#fff;border-color:#5869df}.admin-tabs button:focus-visible{outline:3px solid #23364d;outline-offset:4px}.admin-tab-panel[hidden]{display:none!important}.admin-tab-panel>.card{margin-bottom:24px}@media(max-width:650px){.admin-tabs{display:grid;grid-template-columns:1fr}.admin-tabs button{text-align:left;width:100%}}

.entry-preview{margin:24px 0}.entry-actions{display:flex;flex-wrap:wrap;gap:20px;margin:24px 0}.entry-actions button{margin:0}.entry-demos{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,260px),1fr));gap:24px}.entry-demos .card{border:1px solid #d6ddec}.button-link{display:inline-block;padding:14px 22px;background:#5869df;color:white;border-radius:14px;font-weight:700}.entry-preview a{display:inline-block;min-height:44px;padding-top:8px}