:root{--cream:#fdf9e9;--teal:#116b7e;--mint:#4fdf9a;--ink:#263d40;--muted:#697776;--line:#e1e9df}*{box-sizing:border-box}body{margin:0;background:var(--cream);color:var(--ink);font-family:Quicksand,"Segoe UI",sans-serif;font-size:16px;line-height:1.6}button,input,textarea,select{font:inherit}button,a,input,select,textarea{-webkit-tap-highlight-color:transparent}a{color:var(--teal);text-decoration:none}button{cursor:pointer}button:disabled{opacity:.5;cursor:wait}:focus-visible{outline:3px solid var(--teal);outline-offset:4px}[hidden]{display:none!important}.top{max-width:1220px;margin:auto;display:flex;align-items:center;justify-content:space-between;padding:26px 36px;border-bottom:1px solid #e7e6d6}.brand{font-size:38px;font-weight:700;letter-spacing:-3px;line-height:1}.brand span{display:block;font-size:10px;letter-spacing:3px;text-align:center;margin-top:5px}.back,.login{font-size:14px;font-weight:700}.login{padding:10px 18px;border:1px solid #c9d8ce;border-radius:30px}main{max-width:1180px;min-height:70vh;margin:auto;padding:0 32px}.hero{display:grid;grid-template-columns:1.5fr 1fr;align-items:center;padding:64px 0 52px;gap:20px}.eyebrow{color:var(--teal);font-size:11px;letter-spacing:2px;font-weight:700;margin:0 0 15px}h1{font-size:clamp(30px,4.2vw,51px);line-height:1.2;letter-spacing:-1.5px;margin:0 0 22px;font-weight:700}h1 em{color:var(--teal);font-style:normal}h2{font-size:25px;line-height:1.35;margin:0}h3{font-size:19px;margin:0 0 8px}.intro{color:var(--muted);font-size:17px;margin:0 0 25px}.hero-tags{display:flex;gap:16px;flex-wrap:wrap;font-size:12px;font-weight:600;color:var(--teal)}.hero-art{height:270px;position:relative;display:grid;place-items:center}.planet{width:204px;height:204px;border-radius:50%;background:#d9f5d6;box-shadow:inset -15px -16px 0 #c8e9c4;display:grid;place-items:center;font-size:125px;line-height:1;color:var(--teal);transform:rotate(-12deg)}.planet:after{content:"";position:absolute;width:275px;height:70px;border:2px solid var(--teal);border-radius:50%;transform:rotate(-20deg);opacity:.35}.spark{position:absolute;color:var(--teal);font-size:40px}.s1{right:30px;top:15px;color:#e8ab31}.s2{left:12px;top:40px}.s3{right:24px;bottom:32px}.orbit-tag{position:absolute;bottom:10px;background:white;border-radius:30px;padding:9px 20px;font-size:12px;font-weight:700;transform:rotate(-7deg);box-shadow:0 5px 16px #116b7e0c}.section-title{display:flex;align-items:center;justify-content:space-between;gap:12px}.muted{color:var(--muted)}.section-title>span{font-size:12px}.filters{display:flex;flex-wrap:wrap;gap:8px;margin:20px 0 25px}.chip{border:1px solid #d9dfd3;background:transparent;border-radius:24px;padding:8px 18px;color:var(--muted);font-size:13px;font-weight:600}.chip.selected{background:var(--teal);border-color:var(--teal);color:white}.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.card,.panel{border:1px solid #ecede2;background:white;border-radius:24px;box-shadow:0 5px 20px #233f3510}.card{padding:25px;display:flex;flex-direction:column;transition:transform .18s,box-shadow .18s}.card:hover{transform:translateY(-4px);box-shadow:0 12px 28px #116b7e15}.card-top{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:24px}.card-icon{width:59px;height:59px;display:grid;place-items:center;border-radius:19px;background:#e4f7e5;font-size:29px;color:var(--teal)}.card:nth-child(3n+2) .card-icon{background:#fff1ce;color:#b68325}.card:nth-child(3n) .card-icon{background:#ece8ff;color:#8472b1}.badge{font-size:10px;font-weight:700;color:var(--teal);background:#eaf7ef;padding:4px 9px;border-radius:15px}.card p{font-size:13px;color:var(--muted);margin:0 0 20px}.card-meta{display:flex;gap:15px;font-size:11px;color:var(--muted);padding:14px 0;border-top:1px solid #f0f1e9;margin-top:auto}.bubble{border:0;background:var(--teal);border-radius:18px;color:white;padding:13px 22px;box-shadow:inset 0 -4px 0 #07495445;display:inline-flex;justify-content:center;align-items:center;font-weight:700;font-size:14px;transition:transform .15s;min-height:48px}.bubble:hover{transform:translateY(-2px)}.bubble:active{transform:translateY(1px)}.card .bubble{width:100%;background:#e3f5e9;color:var(--teal);box-shadow:inset 0 -3px 0 #b3d9c355}.secondary{background:#edf4ee;color:var(--teal);box-shadow:inset 0 -3px 0 #d9e5dc}.how{display:flex;align-items:center;gap:20px;padding:26px 30px;margin:35px 0 55px;border-radius:24px;background:#f1efdf}.how p{font-size:13px;color:var(--muted);margin:0}.how h3{font-size:16px}.how-icon{font-size:37px;color:#a88937}footer{border-top:1px solid #e7e6d6;max-width:1180px;margin:auto;padding:25px 32px;display:flex;justify-content:space-between;color:var(--muted);font-size:11px}.notice{background:#fff0d9;color:#714e11;padding:15px 20px;border-radius:18px;margin:24px 0}.entry{max-width:620px;margin:50px auto;padding:35px}.entry h1{font-size:31px}.text-button{display:inline-block;border:0;background:transparent;padding:10px 0;color:var(--teal);font-weight:600;font-size:13px}.entry>.text-button{margin-bottom:22px}label{display:block;font-size:13px;font-weight:700;margin:22px 0 0}input,select,textarea{display:block;width:100%;margin-top:9px;border:1px solid #cedbd3;background:#fbfcf8;border-radius:14px;padding:13px 15px;color:var(--ink);font-size:16px}textarea{resize:vertical;min-height:140px}.entry form>.bubble{width:100%;margin-top:22px}.small{color:var(--muted);font-size:11px;font-weight:500}.runner-top{display:flex;justify-content:space-between;align-items:center;padding:36px 0 25px}.runner-top .eyebrow{margin-bottom:6px}.timer{font-size:25px;font-weight:700;font-variant-numeric:tabular-nums;background:white;border:1px solid var(--line);border-radius:20px;padding:10px 22px}.timer.urgent{color:#b74130;background:#fff2ea}.runner-layout{display:grid;grid-template-columns:230px 1fr;gap:25px}.nav-panel{padding:25px;height:fit-content}#task-nav{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}.task-number{border:1px solid var(--line);border-radius:12px;min-height:42px;background:#fafbf8;color:var(--teal);font-weight:700}.task-number.answered{background:#e3f8ea}.task-number.current{background:var(--teal);color:white}.task-panel{padding:35px}.task-panel h2{font-size:24px;white-space:pre-line}.save-line{font-size:11px;color:var(--muted);display:flex;align-items:center;justify-content:space-between;margin-top:12px;min-height:30px}.task-actions{display:flex;justify-content:space-between;margin-top:25px}.finish-row{display:flex;justify-content:flex-end;align-items:center;gap:24px;margin:25px 0 50px}.finish-row p{font-size:12px}.final{max-width:680px;margin:55px auto;padding:48px;text-align:center}.final-star{font-size:78px;color:var(--teal);background:#def6d5;border-radius:50%;width:130px;height:130px;line-height:130px;margin:0 auto 28px}.final h1{font-size:40px}.final .text-button{display:block;margin-top:14px}.result-status{background:#f6f7ef;padding:17px;border-radius:16px;font-size:13px;margin:25px 0}.empty{grid-column:1/-1;padding:30px;color:var(--muted);border:1px dashed #cdd8ca;border-radius:24px}@media(max-width:800px){.cards{grid-template-columns:repeat(2,1fr)}.hero{grid-template-columns:1fr .65fr}.hero-art{transform:scale(.8)}.runner-layout{grid-template-columns:1fr}.nav-panel{padding:18px}.nav-panel>.small{display:none}#task-nav{display:flex;flex-wrap:wrap}.task-number{min-width:42px}}@media(max-width:540px){.top{padding:20px}.back{display:none}.brand{font-size:31px}main{padding:0 20px}.hero{padding:35px 0;grid-template-columns:1fr}.hero-art{display:none}.hero h1{font-size:34px}.intro{font-size:15px}.hero-tags{gap:10px;font-size:10px}.cards{grid-template-columns:1fr}.section-title h2{font-size:22px}.section-title>span{display:none}.filters{gap:6px}.chip{padding:7px 13px}.card{padding:24px}.card-top{margin-bottom:16px}.how{padding:20px;margin-bottom:30px}.how-icon{display:none}.entry,.final{padding:25px;margin:28px auto}.entry h1{font-size:27px}.runner-top h2{font-size:19px}.timer{padding:8px 14px;font-size:22px}.task-panel{padding:23px}.task-panel h2{font-size:21px}.finish-row{align-items:stretch;flex-direction:column;gap:8px}.finish-row p{text-align:center}.final h1{font-size:34px}footer{padding:20px;font-size:10px;gap:20px}}@media(prefers-reduced-motion:reduce){*{transition:none!important}}

/* Real source instructions, math/media and private training feedback. */
.runner-layout>*{min-width:0}.task-panel{overflow-wrap:anywhere}.task-panel .katex-display{overflow-x:auto;overflow-y:hidden}.task-panel .katex{white-space:normal}.task-instruction{padding:12px 16px;background:#f0f7f0;border-radius:12px;font-size:15px;white-space:pre-line}.task-question{white-space:pre-line;font-size:18px}.task-image{display:block;max-width:100%;max-height:65vh;object-fit:contain;margin:20px auto}.check-answer{margin-top:18px}.answer-feedback{padding:12px 16px;border-radius:12px;background:#fff1d9}.answer-feedback.correct{background:#e3f8ea}.tester-button{width:100%;min-height:44px}.card .tester-note{font-size:11px;text-align:center;margin:0}.result-items,.training-history{text-align:left;font-size:14px;padding-left:24px;max-height:300px;overflow-y:auto}.result-items:empty{display:none}#history-section{border-top:1px solid var(--line);padding-top:20px;margin:20px 0}#train-again{margin:8px 0 16px}#retry-media{display:block;min-height:44px}#level-info{font-size:13px}#task-media-error{margin:12px 0}#answer{font-size:20px}@media(max-width:540px){.task-image{max-height:50vh}.task-question{font-size:16px}.task-instruction{font-size:14px}.check-answer{width:100%}.result-items,.training-history{font-size:13px}}
.class-ranking{list-style:none;padding:0}.class-ranking li{margin:.6rem 0}

/* Catalog controls and separate mode/theme/grade lines. */
.filters{display:grid;grid-template-columns:repeat(3,minmax(0,1fr)) minmax(0,1.5fr);gap:16px;margin:20px 0 8px}.catalog-filter{min-width:0}.filters label{min-width:0;margin:0}.filters input,.filters select{min-width:0;max-width:100%;min-height:48px}.catalog-toolbar{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:8px;margin-bottom:20px}.catalog-toolbar p{margin:0;color:var(--muted);font-size:13px}.review-note{padding:14px 18px;border:1px solid var(--line);border-radius:14px;background:#eaf7ef;font-size:13px}.cards{grid-template-columns:repeat(3,minmax(0,1fr))}.card{min-width:0;overflow-wrap:anywhere}.card .card-kind{color:var(--teal);font-size:14px;font-weight:700;margin:0 0 6px}.card h3{line-height:1.4;margin-bottom:10px}.card .card-grade{font-size:14px;margin:0 0 14px}.card .card-archive-edition{display:inline-block;color:#704800;background:#fff0c2;border:1px solid #c99e45;border-radius:999px;padding:4px 10px;font-size:12px;font-weight:700;margin:0 0 12px}.card .card-variant{font-size:12px;margin:0 0 14px}.card-meta{flex-wrap:wrap;gap:8px 15px}.card button{white-space:normal;overflow-wrap:anywhere}.card button:disabled{cursor:not-allowed}.card .tester-note{margin-top:10px}
@media(max-width:900px){.filters{grid-template-columns:repeat(2,minmax(0,1fr))}.cards{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:540px){.filters{grid-template-columns:minmax(0,1fr);gap:12px}.cards{grid-template-columns:minmax(0,1fr)}.catalog-toolbar{align-items:baseline}}

/* Tournament symbols follow the type, not the card's position after filtering. */
.cards .card .card-icon-start{background:#e4f7e5;color:#116b7e}
.cards .card .card-icon-trial{background:#fff1ce;color:#916712}
.cards .card .card-icon-final{background:#ece8ff;color:#6f5da0}
.cards .card .card-icon-training{background:#e8f4ff;color:#276f9b}
.card-editions{border-top:1px solid var(--line);margin-top:15px;padding-top:10px;font-size:12px}
.card-editions summary{color:var(--teal);cursor:pointer;font-weight:700;min-height:32px}
.card-edition{display:flex;align-items:center;justify-content:space-between;gap:8px;border-top:1px solid #f0f1e9;padding:7px 0}
.card-edition span{min-width:0;overflow-wrap:anywhere}
.card-edition .text-button{flex:none;padding:7px 0}
.catalog-group{margin:26px 0 42px}.catalog-group-title{font-size:23px;margin:0 0 18px}.catalog-subtitle{font-size:17px;margin:26px 0 14px;color:var(--teal)}
.catalog-group .cards{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}.catalog-group .card{min-width:0}
.show-more-training{display:block;margin:16px auto 0;padding:12px 20px;border:1px solid var(--line);border-radius:14px;background:white}
.catalog-group .card-icon-start{background:#e4f7e5;color:#116b7e}.catalog-group .card-icon-trial{background:#fff1ce;color:#916712}.catalog-group .card-icon-final{background:#ece8ff;color:#6f5da0}.catalog-group .card-icon-training{background:#e8f4ff;color:#276f9b}
@media(max-width:1100px){.catalog-group .cards{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:540px){.catalog-group .cards{grid-template-columns:minmax(0,1fr)}.catalog-group-title{font-size:20px}}
#task-nav{display:block}
.level-group+.level-group{border-top:1px solid var(--line);margin-top:18px;padding-top:18px}
.level-group-title{font-size:15px;line-height:1.35;margin:0 0 4px;color:var(--ink)}
.level-group-points{font-size:12px;line-height:1.4;color:var(--teal);font-weight:700;margin:0 0 10px}
.level-task-buttons{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px}
.level-task-buttons .task-number{min-width:0}
.level-task-buttons .task-number:focus-visible{outline:3px solid #d49e30;outline-offset:2px}
@media(max-width:800px){#task-nav{display:grid;grid-template-columns:repeat(auto-fit,minmax(175px,1fr));gap:14px}.level-group+.level-group{border-top:0;border-left:1px solid var(--line);margin:0;padding:0 0 0 14px}}
@media(max-width:540px){#task-nav{display:block}.level-group+.level-group{border-left:0;border-top:1px solid var(--line);margin-top:14px;padding:14px 0 0}}

/* Primary-school reading sizes throughout the learner flow. */
.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
body{font-size:17px}.eyebrow{font-size:13px}.intro{font-size:18px}.small,.card .small{font-size:14px}.text-button{font-size:16px}.bubble{font-size:17px;min-height:52px}
label{font-size:16px}.catalog-toolbar p{font-size:15px}.badge{font-size:12px}.card p{font-size:15px;margin-bottom:15px}.card .card-kind{font-size:16px}.card .card-grade{font-size:16px}.card .card-variant{font-size:15px}.card h3{font-size:20px}.card-meta{font-size:14px}.catalog-subtitle{font-size:19px}
.level-group-title{font-size:17px}.level-group-points,#level-info{font-size:15px}.task-number{font-size:16px;min-height:44px}.save-line{font-size:14px}.finish-row p{font-size:15px}.result-status{font-size:16px}.how p{font-size:15px}.how h3{font-size:18px}footer{font-size:13px}
@media(max-width:540px){.intro{font-size:17px}.card{padding:23px}.card h3{font-size:19px}}