:root{--ink:#182648;--muted:#53617b;--blue:#2847df;--blue-dark:#1933bd;--paper:#f4f7fc;--line:#dbe2ef;--yellow:#ffdf68;--radius:22px;font-family:Arial,Helvetica,sans-serif;color:var(--ink);background:var(--paper);font-size:16px;line-height:1.55;scroll-behavior:smooth;scroll-padding-top:24px}
*{box-sizing:border-box}body{margin:0}button,a{-webkit-tap-highlight-color:transparent}button{font:inherit;cursor:pointer}a{color:inherit;text-decoration:none}button:focus-visible,a:focus-visible{outline:3px solid #ef9b00;outline-offset:4px}button:disabled{cursor:default}button[hidden],[hidden]{display:none!important}.site-header,main,footer{width:min(1180px,calc(100% - 64px));margin:auto}.site-header{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:25px 0;border-bottom:1px solid var(--line)}.brand{display:inline-flex;align-items:center;gap:7px;font-size:23px;font-weight:800;letter-spacing:-1px;white-space:nowrap}.brand-mark{display:grid;place-items:center;width:36px;height:36px;border-radius:11px;background:var(--blue);color:white;font-size:31px;line-height:1;margin-right:5px}.brand-light{font-weight:400}.site-header nav{display:flex;gap:32px;font-size:15px;font-weight:700}.site-header nav a:hover{color:var(--blue)}.intro{display:flex;align-items:center;justify-content:space-between;gap:32px;padding:46px 0 38px}.eyebrow{font-size:12px;font-weight:800;letter-spacing:1.7px;color:var(--muted);margin:0 0 14px}.intro h1{font-size:clamp(2rem,3.7vw,3.15rem);line-height:1.13;letter-spacing:-1.8px;margin:0 0 17px}.intro h1 span{color:var(--blue)}.intro p:not(.eyebrow){color:var(--muted);margin:0}.intro-note{border-left:2px solid var(--line);padding-left:30px;min-width:190px}.intro-note>span{font-weight:800;font-size:44px;letter-spacing:-2px;color:var(--blue)}.intro-note p{font-size:14px}.play-layout{display:grid;grid-template-columns:270px 1fr;gap:25px;align-items:start}.paths{padding:15px 0}.level-buttons{display:grid;gap:10px}.level-button{width:100%;text-align:left;display:flex;gap:13px;align-items:center;padding:15px;border:1px solid var(--line);border-radius:15px;background:white;color:var(--ink);transition:transform .15s,box-shadow .15s}.level-button:hover{transform:translateX(3px)}.level-button[aria-pressed=true]{border-color:var(--blue);box-shadow:0 0 0 1px var(--blue);background:#eaf0ff}.level-icon{display:grid;place-items:center;width:43px;height:43px;flex-shrink:0;border-radius:12px;font-weight:800;font-size:22px;background:var(--accent,#f0e7ff);color:#283c64}.level-button strong{display:block;font-size:17px}.level-button small{font-size:14px;color:var(--muted)}.level-note{font-size:14px;color:var(--muted);margin:20px 5px 0}.game-panel{background:white;border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 12px 35px #1c388009;overflow:hidden;min-width:0}.game-top{background:var(--blue);color:white;padding:18px 27px;display:flex;gap:15px;align-items:center;justify-content:space-between}.tag{font-size:14px;font-weight:700}.score{font-size:15px;font-weight:800;white-space:nowrap;background:#fff2;border:1px solid #ffffff35;border-radius:25px;padding:5px 14px}.progress-meta{display:flex;justify-content:space-between;padding:25px 30px 9px;font-size:13px;color:var(--muted)}.progress-meta span:first-child{font-weight:700;color:var(--ink)}.progress-track{height:6px;background:#e9eef8;margin:0 30px;border-radius:6px;overflow:hidden}.progress-track>div{height:100%;background:var(--blue);width:0;transition:width .3s}#question-area{padding:25px 30px 26px;min-height:365px}.question-topic{font-size:12px;text-transform:uppercase;letter-spacing:1.5px;color:var(--muted);font-weight:700;margin:0 0 7px}#question{font-size:clamp(1.4rem,2.5vw,1.9rem);letter-spacing:-.5px;line-height:1.35;margin:0 0 25px}.choices{display:grid;grid-template-columns:1fr 1fr;gap:12px}.choice{border:1.5px solid var(--line);background:#fff;border-radius:13px;padding:16px 18px;color:var(--ink);font-size:21px;font-weight:700;text-align:center;min-height:62px;transition:border .15s,background .15s}.choice:hover:enabled{border-color:var(--blue);background:#f2f5ff}.choice.correct{border-color:#16845e;background:#e1f6ed;color:#116346}.choice.incorrect{border-color:#ba5721;background:#fff0e4;color:#8d351a;text-decoration:line-through}.choice:disabled:not(.correct):not(.incorrect){opacity:.5}.game-actions{display:flex;gap:24px;flex-wrap:wrap;padding-top:16px}.text-button{border:0;padding:5px 0;background:none;color:var(--blue);font-size:14px;font-weight:700;text-decoration:underline;text-underline-offset:4px}.secondary-action{color:var(--muted)}#feedback:not(:empty){margin-top:16px;padding:15px 18px;border-radius:12px;background:#eef3ff;font-size:16px}#feedback.success{background:#e7f8ee;color:#175e40}#next-button{margin-top:16px}.primary-button,.outline-button{display:inline-flex;align-items:center;justify-content:center;padding:13px 21px;border-radius:11px;border:1.5px solid var(--blue);background:var(--blue);color:#fff;font-size:16px;font-weight:700;line-height:1.4;text-align:center}.primary-button:hover{background:var(--blue-dark)}.outline-button{background:white;color:var(--blue)}.outline-button:hover{background:#eff3ff}.game-bottom{padding:14px 30px;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:20px;color:var(--muted);font-size:12px;background:#fbfcff}.math-visual{display:flex;gap:16px;align-items:center;flex-wrap:wrap;margin:-5px 0 22px}.math-visual:empty{display:none}.dot-group{display:grid;grid-template-columns:repeat(5,18px);gap:9px;padding:14px;border-radius:12px;background:#edf2ff}.count-dot{width:18px;height:18px;border-radius:50%;background:var(--blue)}.math-operator{font-size:28px;font-weight:700}.result{text-align:center;padding:36px 30px}.result .result-score{display:grid;place-items:center;background:var(--yellow);width:104px;height:104px;border-radius:50%;margin:0 auto 20px;font-size:29px;font-weight:800}.result h2{font-size:29px;margin:0 0 12px}.result p{color:var(--muted);max-width:430px;margin:10px auto 20px}.result-actions{display:flex;justify-content:center;gap:12px;flex-wrap:wrap}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:25px;margin-bottom:25px}.section-heading h2,.print-section h2{font-size:34px;line-height:1.15;letter-spacing:-1px;margin:0}.section-heading>p{font-size:15px;color:var(--muted);margin:0}.lessons-section{padding:65px 0}.lesson-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.lesson-card{display:flex;flex-direction:column;background:white;border:1px solid var(--line);border-radius:17px;overflow:hidden}.lesson-card .card-top{background:var(--accent);padding:17px 22px;display:flex;align-items:center;justify-content:space-between;color:#263754;font-size:14px;font-weight:700}.card-top .symbol{font-size:27px;line-height:1;font-weight:800}.card-body{padding:23px;display:flex;flex-direction:column;flex:1}.card-body h3{font-size:22px;letter-spacing:-.5px;line-height:1.25;margin:0 0 11px}.card-body p{font-size:15px;color:var(--muted);margin:0 0 18px}.card-link{font-size:14px;font-weight:700;color:var(--blue);margin-top:auto;text-decoration:underline;text-underline-offset:4px}.print-section{display:grid;grid-template-columns:1fr 1fr;gap:50px;background:#e8eeff;border:1px solid #cdd8fe;border-radius:var(--radius);padding:39px}.print-section>div>p:not(.eyebrow){color:var(--muted);font-size:16px;max-width:420px}.download-box{background:white;border:1px solid var(--line);border-radius:16px;padding:25px;display:grid;gap:10px}.download-box p{margin:0}.download-box .download-title{color:var(--ink)!important;font-weight:800}.download-box .small{font-size:12px!important;padding-top:5px}.parent-note{display:grid;grid-template-columns:1fr 2fr;gap:40px;padding:39px 0}.parent-note h2{font-size:20px;line-height:1.35;margin:0}.parent-note p{font-size:15px;color:var(--muted);margin:0}footer{border-top:1px solid var(--line);padding:24px 0 32px;display:flex;gap:24px;justify-content:space-between;align-items:center}footer .brand{font-size:18px}footer p{font-size:12px;color:var(--muted);margin:0}.skip-link{position:absolute;left:12px;top:-100px;background:#fff;padding:12px;z-index:10}.skip-link:focus{top:12px}.noscript{padding:20px;background:var(--yellow)}.article-wrap{max-width:760px;margin:42px auto 60px}.article-wrap h1{font-size:40px;line-height:1.15;letter-spacing:-1px}.article-wrap h2{font-size:25px;line-height:1.3;margin-top:34px}.article-wrap p,.article-wrap li{font-size:18px}.article-wrap .lead{font-size:21px;color:var(--muted)}.article-wrap .example{background:#e8eeff;border-left:4px solid var(--blue);padding:22px 26px;border-radius:0 16px 16px 0;margin:25px 0}.article-wrap .example p{margin:6px 0}.article-wrap .answer{background:#e7f7ee;border-radius:10px;padding:14px 20px}.article-wrap details{background:white;border:1px solid var(--line);border-radius:12px;padding:16px 20px}.article-wrap summary{cursor:pointer;font-weight:700}.article-downloads{display:flex;gap:12px;flex-wrap:wrap;margin:30px 0}.back-link{color:var(--blue);font-size:14px;text-decoration:underline;text-underline-offset:4px}
@media(max-width:900px){.site-header,main,footer{width:calc(100% - 40px)}.play-layout{grid-template-columns:220px 1fr;gap:18px}.level-button{padding:12px;gap:9px}.level-icon{width:35px;height:39px}.level-button small{font-size:13px}.game-top{padding:17px 20px}.game-top .tag{font-size:13px}#question-area{padding:24px}.progress-meta{padding-left:24px;padding-right:24px}.progress-track{margin:0 24px}.lesson-grid{grid-template-columns:repeat(2,1fr)}.print-section{gap:25px;padding:28px}.section-heading>p{max-width:240px}footer{flex-wrap:wrap}.intro-note{min-width:155px;padding-left:20px}}
@media(max-width:650px){.site-header,main,footer{width:calc(100% - 32px)}.site-header{padding:19px 0;gap:16px;flex-wrap:wrap}.brand{font-size:21px}.brand-mark{width:31px;height:31px;font-size:27px}.site-header nav{gap:25px;font-size:14px;width:100%}.intro{padding:31px 0 24px}.intro h1{font-size:34px;letter-spacing:-1.3px}.intro-note{display:none}.intro p:not(.eyebrow){font-size:16px}.eyebrow{font-size:11px;letter-spacing:1.3px}.play-layout{grid-template-columns:1fr;gap:17px}.paths{padding:0}.level-buttons{grid-template-columns:repeat(5,1fr);gap:6px}.level-button{padding:9px 3px;justify-content:center;text-align:center;border-radius:11px}.level-icon,.level-button small{display:none}.level-button strong{font-size:14px;line-height:1.3}.level-button strong::after{content:' anni';font-size:11px;font-weight:400;display:block;margin-top:3px}.level-note{font-size:12px;margin:12px 2px 0}.game-top{padding:15px 17px;gap:8px}.game-top .tag{font-size:12px}.score{font-size:13px;padding:4px 10px}.progress-meta{padding:19px 19px 8px;font-size:12px}.progress-track{margin:0 19px}#question-area{padding:23px 19px}#question{font-size:23px}.choice{padding:14px 8px;font-size:22px}.game-actions{gap:16px}.text-button{font-size:13px}.game-bottom{padding:12px 18px;gap:12px;align-items:start}.game-bottom span{max-width:180px;font-size:11px}.lessons-section{padding:42px 0}.section-heading{display:block}.section-heading h2,.print-section h2{font-size:29px}.section-heading>p{margin-top:13px;max-width:none}.section-heading br{display:none}.lesson-grid{grid-template-columns:1fr}.print-section{grid-template-columns:1fr;padding:25px 19px;gap:16px}.download-box{padding:20px}.parent-note{grid-template-columns:1fr;gap:14px;padding:30px 0}.parent-note h2{font-size:19px}footer{display:block}footer p{margin-top:12px}.article-wrap{margin-top:30px}.article-wrap h1{font-size:32px}.article-wrap p,.article-wrap li{font-size:17px}.article-wrap .lead{font-size:19px}.article-wrap .example{padding:17px}.article-downloads{display:grid}.result{padding:30px 19px}.result h2{font-size:26px}}
@media(prefers-reduced-motion:reduce){:root{scroll-behavior:auto}*{transition:none!important}}
/* Mission-based practice */
.free-label{font-size:12px;color:#175e40;background:#ddf3e5;border-radius:20px;padding:4px 10px;white-space:nowrap}.site-header nav{align-items:center;gap:24px}.intro{padding-top:35px;padding-bottom:30px}.intro h1{font-size:clamp(2rem,3.5vw,2.95rem)}.game-column{min-width:0}.mission-picker{padding:0 0 18px}.mission-heading{display:flex;justify-content:space-between;align-items:center;gap:16px;margin:8px 0 13px}.mission-heading .eyebrow{margin:0}.mission-heading>span{font-size:12px;color:var(--muted)}.mission-buttons{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.mission-button{text-align:left;background:white;border:1px solid var(--line);border-radius:15px;padding:15px 14px;display:flex;flex-direction:column;align-items:start;gap:7px;color:var(--ink)}.mission-button:hover{border-color:var(--blue)}.mission-button[aria-pressed=true]{background:#e8eeff;border-color:var(--blue);box-shadow:inset 0 0 0 1px var(--blue)}.mission-symbol{font-size:22px;color:var(--blue);font-weight:800;height:29px;line-height:1.3}.mission-button strong{font-size:16px;line-height:1.25}.mission-button small{font-size:13px;color:var(--muted);line-height:1.4;flex:1}.mission-status{font-size:11px;font-weight:700;color:var(--blue);margin-top:5px}.difficulty-row{display:flex;gap:18px;align-items:center;margin-top:15px}.difficulty-row>span{font-size:13px;font-weight:700}.difficulty-buttons{display:flex;gap:7px;flex-wrap:wrap}.difficulty-button{border:1px solid var(--line);background:white;border-radius:20px;color:var(--muted);font-size:12px;font-weight:700;padding:7px 13px;display:inline-flex;gap:7px;align-items:center}.difficulty-button[aria-pressed=true]{background:var(--ink);color:white;border-color:var(--ink)}.mini-stars{color:#9c6900;font-size:11px;letter-spacing:1px}.difficulty-button[aria-pressed=true] .mini-stars{color:var(--yellow)}.choice{display:flex;align-items:center;gap:12px}.choice-letter{font-size:12px;font-weight:700;border:1px solid var(--line);border-radius:7px;padding:3px 8px;color:var(--muted);flex-shrink:0}.choice-value{text-align:center;flex:1;padding-right:28px}.choice.correct .choice-letter{background:#116346;color:white;border-color:#116346}.choice.incorrect .choice-letter{color:#8d351a;border-color:#d3a07f}.solution-steps{padding-left:22px;margin:10px 0 0}.solution-steps li+li{margin-top:6px}#feedback strong{font-size:15px}#feedback .solution-steps{font-size:15px}.review-strip{display:flex;align-items:center;justify-content:space-between;gap:18px;background:#fff4cf;border:1px solid #e6d897;border-radius:15px;padding:17px 20px;margin-top:17px}.review-strip strong{font-size:15px}.review-strip p{font-size:13px;color:#63562f;margin:4px 0 0}.review-strip button{padding:10px 16px;font-size:14px;white-space:nowrap;background:#fff;border-color:#9b7d20;color:#6e5716}.review-strip button:disabled{opacity:.55}.progress-section{margin-top:42px;padding:28px;background:white;border:1px solid var(--line);border-radius:20px}.progress-heading{display:flex;align-items:start;justify-content:space-between;gap:30px}.progress-heading .eyebrow{margin-bottom:6px}.progress-heading h2{margin:0;font-size:27px;line-height:1.25;letter-spacing:-.6px}.progress-heading>p{font-size:12px;line-height:1.5;color:var(--muted);margin:0;max-width:280px}.session-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:25px}.session-stats>div{padding-left:19px;border-left:3px solid var(--line)}.session-stats>div:first-child{border-color:var(--blue)}.session-stats>div:nth-child(2){border-color:#18a57d}.session-stats>div:last-child{border-color:#e2b43c}.session-stats span{font-size:31px;font-weight:800;line-height:1.2;letter-spacing:-.5px}.session-stats p{font-size:13px;color:var(--muted);margin:5px 0 0}.progress-details{border-top:1px solid var(--line);padding-top:16px;margin-top:24px}.progress-details summary{cursor:pointer;color:var(--blue);font-size:14px;font-weight:700}.progress-details>p{font-size:12px;color:var(--muted);margin-bottom:0}.progress-level-row{display:grid;grid-template-columns:80px 1fr 80px;gap:20px;align-items:center;margin-top:17px;font-size:13px}.progress-level-row progress{width:100%;height:10px;accent-color:var(--blue)}.progress-level-row span{text-align:right;color:var(--muted)}.result-stars{font-size:38px;line-height:1.2;color:#a97000;letter-spacing:8px;margin-bottom:20px}.result .result-score{font-size:27px;width:96px;height:96px}.round-review{text-align:left;background:#f4f7fc;border:1px solid var(--line);border-radius:12px;padding:16px 20px;margin-top:25px}.round-review summary{cursor:pointer;font-size:15px;font-weight:700}.review-item{padding:18px 0;border-top:1px solid var(--line);margin-top:15px}.review-item strong{font-size:15px;line-height:1.5;display:block}.review-outcome{font-size:12px;color:var(--blue);display:block;margin:6px 0}.review-item ol{font-size:14px}.result-resources{display:flex;gap:18px;justify-content:center;flex-wrap:wrap;margin-top:22px}.fraction-diagram{display:flex;width:220px;height:53px;border:2px solid var(--blue);border-radius:8px;overflow:hidden}.fraction-part{flex:1;border-right:2px solid var(--blue);background:white}.fraction-part:last-child{border-right:0}.fraction-part.filled{background:#738aff}.diagram-label{font-size:13px;color:var(--muted)}.rectangle-diagram{position:relative;width:150px;height:80px;background:#e8eeff;border:2px solid var(--blue);margin:18px 55px 5px 0}.rect-width{position:absolute;top:-24px;left:0;width:100%;text-align:center;font-size:14px;font-weight:700;color:var(--blue)}.rect-height{position:absolute;top:26px;right:-50px;white-space:nowrap;font-size:14px;font-weight:700;color:var(--blue)}.dot-group{grid-template-columns:repeat(5,18px)}
@media(max-width:1000px){.mission-button{padding:12px}.mission-button strong{font-size:14px}.mission-button small{font-size:12px}.mission-heading{flex-wrap:wrap;gap:5px}.mission-heading>span{font-size:11px}.difficulty-row{align-items:start;gap:10px}.difficulty-button{padding:6px 10px;font-size:11px}.site-header nav{gap:16px}.free-label{display:none}.progress-heading>p{max-width:230px}.progress-heading h2{font-size:25px}.progress-heading br{display:none}}
@media(max-width:650px){.site-header nav{gap:25px}.intro h1{font-size:32px}.mission-picker{padding-bottom:15px}.mission-heading{margin-top:0}.mission-heading .eyebrow{font-size:10px}.mission-heading>span{font-size:10px}.mission-buttons{gap:6px}.mission-button{padding:12px 9px;gap:6px;border-radius:12px}.mission-button strong{font-size:13px;line-height:1.3;overflow-wrap:anywhere}.mission-button small{display:none}.mission-symbol{font-size:21px;height:27px}.mission-status{font-size:10px;line-height:1.3}.difficulty-row{display:block;margin-top:12px}.difficulty-row>span{display:none}.difficulty-buttons{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:6px}.difficulty-button{padding:8px 4px;justify-content:center;font-size:10px;flex-wrap:wrap;gap:3px}.difficulty-button .mini-stars{font-size:10px}.choice{padding:13px 10px;gap:7px}.choice-value{padding-right:17px}.choice-letter{font-size:10px;padding:2px 6px}.review-strip{padding:15px 14px;gap:10px;align-items:start}.review-strip strong{font-size:13px;line-height:1.4;display:block}.review-strip p{font-size:12px}.review-strip button{font-size:12px;padding:9px 11px}.progress-section{margin-top:30px;padding:22px 18px}.progress-heading{display:block}.progress-heading h2{font-size:25px}.progress-heading>p{font-size:11px;max-width:none;margin-top:10px}.session-stats{gap:10px;margin-top:23px}.session-stats>div{padding-left:10px}.session-stats span{font-size:24px}.session-stats p{font-size:11px;line-height:1.4}.progress-level-row{grid-template-columns:62px 1fr 66px;gap:10px;font-size:12px}.progress-details summary{font-size:13px}.result-stars{font-size:31px}.result .result-score{width:85px;height:85px;font-size:24px}.round-review{padding:14px}.result-resources .card-link{font-size:13px}.fraction-diagram{width:180px;height:46px}.math-visual{gap:12px}.dot-group{padding:12px;grid-template-columns:repeat(5,14px);gap:7px}.count-dot{width:14px;height:14px}#feedback .solution-steps{font-size:14px}}
/* Age-independent Olympiad path */
.path-switch{display:grid;grid-template-columns:1fr 1.3fr;gap:4px;padding:4px;margin-bottom:18px;border:1px solid var(--line);border-radius:12px;background:#e9eef8}.path-switch button{padding:10px 7px;border:0;border-radius:8px;background:transparent;color:var(--muted);font-size:12px;line-height:1.4;font-weight:700}.path-switch button[aria-pressed=true]{background:white;color:var(--ink);box-shadow:0 2px 5px #18264812}#olympiad-path-button[aria-pressed=true]{background:var(--yellow)}.olympiad-intro{padding:22px 20px;border-radius:18px;background:#fff4cf;border:1px solid #e6d897}.olympiad-symbol{display:grid;place-items:center;background:#ffdf68;width:45px;height:45px;border-radius:13px;font-size:28px;color:#785500}.olympiad-intro h2{font-size:28px;letter-spacing:-.7px;line-height:1.2;margin:18px 0 14px}.olympiad-intro p,.olympiad-intro li{font-size:14px;line-height:1.6}.olympiad-intro ul{padding-left:18px;color:#63562f}.olympiad-intro .level-note{margin:18px 0 0;font-size:12px;color:#63562f;border-top:1px solid #e6d897;padding-top:14px}.olympiad-guidance{font-size:14px;color:var(--muted);line-height:1.6;margin:14px 0}.olympiad-difficulties{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));flex:1}.olympiad-difficulties .difficulty-button{border-radius:12px;padding:11px 12px;align-items:flex-start;flex-direction:column;gap:3px;font-size:13px;text-align:left;color:var(--ink)}.olympiad-difficulties .difficulty-button[aria-pressed=true]{background:#fff0b8;color:#664500;border-color:#ae810e;box-shadow:inset 0 0 0 1px #ae810e}.difficulty-description{font-weight:400;font-size:11px}.olympiad-difficulties .difficulty-button[aria-pressed=true] .mini-stars{color:#856000}.number-answer-form label{display:block;font-size:14px;font-weight:700;margin-bottom:9px}.number-answer-row{display:flex;align-items:stretch;gap:12px;max-width:440px}.number-answer-row input{width:100%;min-width:0;border:1.5px solid #a7b5d2;border-radius:11px;background:white;color:var(--ink);font:700 24px/1.3 Arial,Helvetica,sans-serif;padding:12px 16px}.number-answer-row input:focus-visible{outline:3px solid #ef9b00;outline-offset:3px}.number-answer-row input[aria-invalid=true]{border-color:#b35620;background:#fff5eb}.number-answer-row input:disabled{background:#f2f5fa;color:var(--muted)}.number-answer-row button:disabled{opacity:.55}.number-answer-form p{font-size:12px;color:var(--muted);margin:10px 0 0}.square-grid{display:grid;grid-template-columns:repeat(var(--cols),46px);border-top:2px solid var(--blue);border-left:2px solid var(--blue)}.square-grid span{width:46px;height:46px;background:#eef2ff;border-right:2px solid var(--blue);border-bottom:2px solid var(--blue)}.point-grid{display:grid;grid-template-columns:repeat(var(--cols),12px);gap:35px;padding:14px;background:#f4f7fc;border-radius:10px}.point-grid span{height:12px;width:12px;background:var(--blue);border-radius:50%}.progress-level-row{grid-template-columns:120px 1fr 80px}
@media(max-width:900px){.olympiad-intro{padding:19px 16px}.olympiad-intro h2{font-size:24px}.olympiad-difficulties .difficulty-button{font-size:11px;padding:10px 8px}.difficulty-description{font-size:10px}.path-switch button{font-size:11px}}
@media(max-width:650px){.path-switch{margin-bottom:14px;grid-template-columns:1fr 1fr}.path-switch button{padding:10px;font-size:13px}.olympiad-intro{padding:15px 17px}.olympiad-intro .olympiad-symbol,.olympiad-intro ul{display:none}.olympiad-intro h2{font-size:22px;margin:0 0 8px}.olympiad-intro h2 br{display:none}.olympiad-intro p{font-size:13px;margin:8px 0}.olympiad-intro .level-note{font-size:11px;margin-top:11px;padding-top:10px}.olympiad-guidance{font-size:12px;margin:8px 0 12px}.olympiad-difficulties{gap:7px}.olympiad-difficulties .difficulty-button{font-size:11px;align-items:center;text-align:center;min-height:61px;justify-content:center}.difficulty-description{font-size:10px}.number-answer-row{gap:9px}.number-answer-row input{font-size:22px;padding:12px;max-width:none}.number-answer-row button{padding:11px 15px;font-size:14px}.progress-level-row{grid-template-columns:98px 1fr 65px;gap:10px}.progress-meta{gap:10px}}
/* Saved learning, accessible audio, reports and resources */
.save-banner{padding:12px 16px;margin:0 0 21px;border:1px solid #c9d8ed;border-radius:12px;background:#eaf1fc;color:#344d72;font-size:13px}.adaptive-setting{border-top:1px solid var(--line);margin-top:16px;padding-top:14px}.adaptive-setting label{display:flex;align-items:center;gap:9px;font-size:14px;font-weight:700}.adaptive-setting input{width:18px;height:18px;accent-color:var(--blue)}.adaptive-setting p{font-size:13px;line-height:1.5;color:var(--muted);margin:5px 0 0 27px}.voice-controls{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin:-10px 0 21px}.voice-controls .text-button{font-size:14px}.voice-controls span{font-size:12px;color:var(--muted)}.text-button:disabled{opacity:.6}#example-button{margin-top:15px}.example-box{background:#fff8df;border:1px solid #e6d897;border-radius:12px;padding:17px;margin-top:15px;font-size:15px}.example-box p{margin:9px 0}.example-box strong{font-size:15px}.progress-heading>p{max-width:380px;font-size:13px}.learning-report{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin-top:20px}.report-card{background:#f5f7fc;border:1px solid var(--line);border-radius:14px;padding:18px}.report-card h3{margin:8px 0;font-size:18px;line-height:1.3}.report-card p{font-size:13px;color:var(--muted);margin:8px 0}.report-status{font-size:12px;color:#2847a1;background:#e7edff;padding:4px 8px;border-radius:7px;display:inline-block}.report-card progress{width:100%;height:10px;accent-color:var(--blue)}.report-card .report-note{font-size:12px}.report-card .text-button{font-size:14px;text-align:left}.reset-confirm{padding:15px;background:#fff4e3;border:1px solid #e5c69d;border-radius:12px;margin-top:13px}.reset-confirm p{font-size:14px}.reset-confirm .text-button{margin-left:18px}.lesson-filters{display:grid;grid-template-columns:2fr 1fr 1fr;gap:16px;align-items:end;background:white;border:1px solid var(--line);border-radius:16px;padding:20px}.lesson-filters label{font-size:14px;font-weight:700;min-width:0}.lesson-filters input,.lesson-filters select{display:block;margin-top:8px;width:100%;min-width:0;max-width:100%;padding:11px 12px;border:1px solid #a8b7d3;border-radius:9px;background:white;color:var(--ink);font:inherit;font-weight:400;font-size:15px}.lesson-filters input:focus-visible,.lesson-filters select:focus-visible,.adaptive-setting input:focus-visible{outline:3px solid #ef9b00;outline-offset:3px}.filter-status{font-size:13px;color:var(--muted);line-height:1.6}.resource-heading{font-size:21px;margin:25px 0 16px;letter-spacing:-.3px}.practice-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:15px}.practice-card,.worksheet-card{padding:21px;background:white;border:1px solid var(--line);border-radius:15px;min-width:0}.practice-card h3,.worksheet-card h3{font-size:20px;line-height:1.3;margin:10px 0}.practice-card p{font-size:14px;color:var(--muted);margin:10px 0 16px}.resource-age{font-size:12px;font-weight:700;color:var(--blue)}.practice-actions{display:flex;flex-wrap:wrap;gap:8px}.practice-actions button{font-size:12px;padding:8px 11px}.empty-state{padding:16px;background:#eef2fb;border-radius:12px;color:var(--muted);font-size:14px;line-height:1.6}.olympiad-print{padding:50px 0 12px}.download-all{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:22px}.worksheet-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:15px}.worksheet-card{border-top:4px solid #e5bd42}.worksheet-card .card-link{display:block;margin-top:13px}.adaptive-result{background:#eef3ff;border-radius:12px;padding:14px 18px;color:#334a72!important;font-size:15px}.intro{padding-top:25px;padding-bottom:23px}.intro h1{font-size:clamp(1.8rem,3.1vw,2.6rem)}
@media(max-width:900px){.learning-report,.practice-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.lesson-filters{grid-template-columns:1fr 1fr}.lesson-filters label:first-child{grid-column:1/-1}.worksheet-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.progress-heading>p{max-width:310px}}
@media(max-width:650px){.save-banner{font-size:12px;padding:11px 13px;margin-bottom:17px}.adaptive-setting label{font-size:14px}.adaptive-setting p{font-size:12px}.voice-controls{gap:12px;margin-top:-9px;margin-bottom:18px}.voice-controls span{flex-basis:100%}.voice-controls span:empty{display:none}.learning-report{grid-template-columns:1fr}.report-card{padding:16px}.progress-heading>p{max-width:none;font-size:12px}.lesson-filters{padding:16px;gap:13px}.lesson-filters label{font-size:13px}.lesson-filters select{font-size:14px;padding:10px 7px}.practice-grid{grid-template-columns:1fr}.practice-card{padding:18px}.practice-actions button{font-size:13px}.worksheet-grid{grid-template-columns:1fr 1fr;gap:10px}.worksheet-card{padding:15px 12px}.worksheet-card h3{font-size:17px;overflow-wrap:anywhere}.worksheet-card .card-link{font-size:13px}.resource-age{font-size:12px}.olympiad-print{padding-top:35px}.olympiad-print h2{font-size:28px}.download-all{display:grid}.filter-status{font-size:12px}.intro h1{font-size:29px}.reset-confirm .outline-button{font-size:14px}.progress-details>p{font-size:13px}}
/* Public resource directories and a simple first visit */
.directory-intro,.launch-hero{padding:45px 0 32px;max-width:900px}.directory-intro h1,.launch-hero h1{font-size:clamp(2rem,4.3vw,3.5rem);line-height:1.15;letter-spacing:-1.4px;margin:0 0 20px}.directory-intro>p:not(.eyebrow),.launch-hero p:not(.eyebrow){font-size:18px;line-height:1.6;color:var(--muted);max-width:760px}.launch-hero .launch-meta{font-size:14px}.directory-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.directory-card{padding:26px;border:1px solid var(--line);border-radius:17px;background:white;min-width:0}.directory-card h2{font-size:23px;line-height:1.3;margin:10px 0}.directory-card h2 a:hover{color:var(--blue)}.directory-card p{font-size:16px;color:var(--muted)}.directory-links{display:flex;align-items:center;gap:18px;flex-wrap:wrap;margin-top:20px}.launch-callout{margin:32px 0;padding:28px 30px;background:#e8eeff;border:1px solid #cdd8fe;border-radius:19px}.launch-callout h2{font-size:27px;line-height:1.2;margin:0 0 15px}.launch-callout p{font-size:16px;max-width:820px;color:var(--muted)}.launch-callout .download-all{margin-bottom:0}.launch-steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin-bottom:35px}.launch-steps article{border-top:3px solid var(--blue);padding-top:18px}.launch-steps span{font-size:13px;font-weight:800;color:var(--blue)}.launch-steps h2{font-size:23px;line-height:1.3}.launch-steps p{font-size:16px;color:var(--muted)}.launch-faq{margin:40px 0;max-width:850px}.launch-faq h2{font-size:29px}.launch-faq details{background:white;border:1px solid var(--line);border-radius:12px;padding:17px 20px;margin:10px 0}.launch-faq summary{cursor:pointer;font-size:16px;font-weight:700}.launch-faq p{font-size:16px;color:var(--muted)}.stage-index{display:flex;flex-wrap:wrap;gap:10px;margin:25px 0}.stage-index a{padding:9px 13px;border:1px solid var(--line);background:white;border-radius:9px;color:var(--blue);font-size:14px;font-weight:700}.olympiad-reading{padding-top:20px}.olympiad-reading>h2{padding:18px 20px;background:#ffefb3;border-radius:14px}.olympiad-reading>h2 span{display:block;font-size:14px;font-weight:400;letter-spacing:0;margin-top:5px}.static-problem{padding:20px 0;border-bottom:1px solid var(--line)}.static-problem h3{margin:0;font-size:21px;line-height:1.3}.static-problem details+details{margin-top:10px}.resource-nav{display:flex;gap:13px 24px;flex-wrap:wrap;padding-top:29px}.resource-nav a{font-size:14px;color:var(--blue);text-decoration:underline;text-underline-offset:4px}.site-header nav{flex-wrap:wrap;row-gap:10px}footer nav{font-size:13px;line-height:1.8;color:var(--muted)}
@media(max-width:650px){.directory-intro,.launch-hero{padding-top:30px}.directory-intro h1,.launch-hero h1{font-size:33px;letter-spacing:-1px}.directory-intro>p:not(.eyebrow),.launch-hero p:not(.eyebrow){font-size:16px}.directory-grid{grid-template-columns:1fr}.directory-card{padding:23px 20px}.directory-card h2{font-size:22px}.launch-callout{padding:24px 20px}.launch-callout h2{font-size:25px}.launch-steps{grid-template-columns:1fr;gap:15px}.launch-steps h2{font-size:23px;margin:10px 0}.launch-steps p{margin-bottom:9px}.launch-faq details{padding:16px}.stage-index a{font-size:13px}.site-header nav{gap:14px}.static-problem h3{font-size:20px}.olympiad-reading>h2{font-size:24px}.resource-nav{gap:12px 20px}.resource-nav a{font-size:14px}}

/* Worked solutions stay readable beside the game, including long formulae. */
.worked-solution{margin:20px 0;padding:24px;border:1px solid #bac8ff;border-radius:16px;background:#f1f5ff;color:#172449;overflow-wrap:anywhere}
.worked-solution h3{margin:0 0 12px;font-size:1.25rem;line-height:1.4;letter-spacing:0}
.worked-solution .solution-method{font-size:1rem;line-height:1.65;margin:0 0 18px;color:#33486c}
.worked-solution .solution-steps{margin:0;padding-left:1.65rem;font-size:1rem;line-height:1.75}
.worked-solution .solution-steps li{padding-left:8px;margin:0 0 14px}
.worked-solution .solution-steps li::marker{font-weight:800;color:#2847df}
.worked-solution .solution-answer{border-top:1px solid #c8d4f4;margin:18px 0 0;padding:16px 0 0;font-size:1.15rem;font-weight:800}
@media(max-width:650px){.worked-solution{padding:19px 16px}.worked-solution .solution-steps{padding-left:1.4rem}.worked-solution .solution-steps li{padding-left:4px}}
/* Topic paths and precise, accessible mathematical diagrams. */
.math-diagram,.lesson-diagram{width:100%;max-width:660px;margin:16px auto;text-align:left}
.math-diagram img,.lesson-diagram img{display:block;width:100%;height:auto;background:#fff;border:1px solid #dce2ef;border-radius:12px}
.diagram-caption,.lesson-diagram figcaption{font-size:.84rem;color:#53617b;margin-top:8px;line-height:1.5}
.diagram-data{font-size:.85rem;margin-top:10px}.diagram-data summary{cursor:pointer}
.diagram-data table{width:100%;border-collapse:collapse;margin-top:10px}.diagram-data caption{text-align:left;font-weight:700}
.diagram-data th,.diagram-data td{text-align:left;padding:7px;border-bottom:1px solid #dce2ef}
.prerequisite{background:#eef2ff;border-left:3px solid #2847df;padding:12px 16px;border-radius:6px;line-height:1.6;font-size:.9rem}
.mission-resources{display:flex;flex-wrap:wrap;gap:8px 22px;margin:14px 0}
.topic-group{padding:20px 0 36px;scroll-margin-top:20px}.topic-group>h2{margin:0 0 18px}
.topic-group h3{font-size:1.2rem;line-height:1.4}.topic-group h3 a{color:inherit}
.topic-example{margin-top:36px;padding-top:28px;border-top:1px solid #dce2ef}
.topic-example h2{font-size:1.25rem;line-height:1.6}.method-note{color:#53617b}
.answer-note{background:#e5f6f0;border-radius:8px;padding:12px 16px}
.article-wrap .download-all{flex-wrap:wrap}.article-wrap p{overflow-wrap:anywhere}
@media(max-width:640px){.mission-heading{align-items:flex-start;gap:8px;flex-direction:column}.site-header nav{flex-wrap:wrap}.topic-group{padding-bottom:20px}.mission-button small{line-height:1.5}}

/* The home page keeps the active question in focus. */
.home-page main{max-width:860px}
.home-intro{padding:30px 0 22px}
.home-intro h1{font-size:clamp(1.65rem,3vw,2.15rem);line-height:1.25;letter-spacing:-.7px;margin:0 0 8px}
.home-intro h1 span{color:var(--blue)}
.home-intro p{font-size:1rem;color:var(--muted);margin:0}
.home-page .play-layout{display:block;scroll-margin-top:20px}
.path-settings{background:#fff;border:1px solid var(--line);border-radius:16px;margin-bottom:18px}
.path-settings>summary{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:17px 22px;cursor:pointer;list-style:none}
.path-settings>summary::-webkit-details-marker{display:none}
.selected-path{display:grid;gap:3px;min-width:0}
.selected-path strong{font-size:1rem;line-height:1.45}
.selected-path>span{color:var(--muted);font-size:.875rem}
.settings-label{font-size:.875rem;color:var(--blue);font-weight:700;display:flex;align-items:center;gap:10px;flex-shrink:0}
.settings-label::after{content:'+';font-size:1.3rem;line-height:1}
.path-settings[open] .settings-label::after{content:'−'}
.path-settings[open]>summary{border-bottom:1px solid var(--line)}
.path-settings-body{display:grid;grid-template-columns:220px minmax(0,1fr);gap:24px;padding:24px}
.path-settings .paths,.path-settings .mission-picker{padding:0;min-width:0}
.path-settings .eyebrow{font-size:.75rem;letter-spacing:1px}
.path-settings .level-note{display:none}
.path-settings .level-button{padding:11px;gap:10px}
.path-settings .level-button:hover{transform:none}
.path-settings .level-icon{width:32px;height:32px;font-size:18px;border-radius:9px}
.path-settings .level-button strong{font-size:1rem}
.path-settings .level-button small{font-size:.875rem}
.path-settings .mission-heading{display:block}
.path-settings #mission-count{display:none}
.path-settings .mission-buttons{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}
.path-settings .mission-button{padding:13px;gap:7px;min-width:0}
.path-settings .mission-button strong{font-size:.875rem;line-height:1.45;overflow-wrap:anywhere}
.path-settings .mission-button small,.path-settings .mission-status{display:none}
.path-settings .mission-symbol{font-size:18px;line-height:1.3}
.path-settings .difficulty-row{display:block}
.path-settings .difficulty-row>span{display:block;font-size:.875rem;margin-bottom:8px}
.path-settings .difficulty-buttons{display:flex;flex-wrap:wrap;gap:7px}
.path-settings .difficulty-button{font-size:.875rem;flex:1 1 110px;min-width:0;white-space:normal}
.path-settings .adaptive-setting label{font-size:.875rem}
.path-settings .adaptive-setting p{font-size:.875rem;line-height:1.5}
.settings-footer{border-top:1px solid var(--line);padding:16px 24px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.settings-footer p{font-size:.875rem;color:var(--muted);margin:0;max-width:370px}
.settings-footer button{flex-shrink:0}
.home-page .mission-resources:empty{display:none}
.home-page .mission-resources{margin:0 0 15px}
.home-page .prerequisite{margin-top:0;font-size:1rem}
.home-page .progress-meta{font-size:.875rem;padding-top:19px}
.home-page #question-area{min-height:0;padding-top:20px}
.home-page #question{margin-bottom:21px}
.home-page .game-bottom{font-size:.875rem}
.home-page .question-topic{font-size:.75rem}
.home-page .voice-controls span{font-size:.875rem}
.home-page .review-strip p,.home-page .review-strip strong{font-size:.875rem}
.home-progress.progress-section{margin-top:20px;padding:0;border-radius:14px}
.home-progress>summary{cursor:pointer;padding:18px 22px;font-size:1rem;font-weight:700}
.home-progress[open]>summary{border-bottom:1px solid var(--line)}
.progress-content{padding:22px}
.home-progress .progress-heading h2{font-size:1.3rem}
.home-progress .progress-heading .eyebrow{display:none}
.home-progress .progress-heading>p,.home-progress .session-stats p,.home-progress .progress-details>p{font-size:.875rem}
.home-resources{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:22px 0}
.home-resources>a{display:grid;gap:4px;padding:17px 18px;border:1px solid var(--line);border-radius:12px;background:transparent}
.home-resources>a:hover{border-color:var(--blue);background:white}
.home-resources strong{color:var(--blue);font-size:1rem}
.home-resources span{font-size:.875rem;color:var(--muted)}
.home-page .save-banner{font-size:.875rem;text-align:center;background:none;border:0;padding:0 0 18px;margin:0;color:var(--muted)}
.home-page .footer-help,.home-page footer p{font-size:.875rem}
summary:focus-visible{outline:3px solid #ef9b00;outline-offset:4px}
.resource-catalog .practice-actions a{font-size:.875rem;display:inline-block;text-align:center}
.resource-catalog .practice-actions a:hover{border-color:var(--blue);background:#eef2ff}
.scoring-rules{margin-top:18px;border:1px solid var(--line);border-radius:14px;background:white;font-size:.875rem}
.scoring-rules>summary{padding:16px 22px;cursor:pointer;font-weight:700}
.scoring-rules>div{padding:0 22px 18px}
.scoring-rules p{line-height:1.65;max-width:660px}
.scoring-rules table{border-collapse:collapse;width:100%;max-width:430px;text-align:left}
.scoring-rules caption{text-align:left;margin-bottom:10px;color:var(--muted)}
.scoring-rules th,.scoring-rules td{padding:8px 12px;border-bottom:1px solid var(--line)}
.notebook-solution.worked-solution{background:white;padding:22px;border:1px solid #b8c8ef;overflow:hidden}
.solution-heading{display:flex;justify-content:space-between;align-items:center;gap:15px}
.solution-heading .eyebrow{font-size:.75rem;letter-spacing:1.2px;margin-bottom:5px}
.solution-heading h3{margin:0}
.solution-award{font-size:1rem;font-weight:800;color:#08634e;background:#e3f6ed;border-radius:12px;padding:8px 13px;flex-shrink:0;animation:score-appear .4s ease-out}
.notebook-controls{display:flex;gap:9px;align-items:center;flex-wrap:wrap;margin:18px 0}
.notebook-controls button{background:#f1f5ff;color:#2847df;border:1px solid #ccd7f3;border-radius:8px;padding:9px 12px;font-size:.875rem;font-weight:700;min-height:40px}
.notebook-controls button:disabled{opacity:.55}
.notebook-controls span{font-size:.875rem;color:var(--muted);flex-basis:100%;min-height:22px}
.solution-layout{display:grid;grid-template-columns:minmax(0,1.45fr) minmax(210px,1fr);gap:22px;align-items:start}
.pen-figure{margin:0 0 24px;border-radius:16px;background:#0c2026;overflow:hidden;border:1px solid #193e49}
.pen-figure figcaption{padding:18px 22px 0;display:flex;flex-direction:column;gap:6px;color:#f2fffd}
.pen-figure figcaption strong{font-size:1.0625rem}
.pen-figure figcaption span{font-size:.875rem;color:#bdd8dc;line-height:1.55}
#pen-board-container{max-width:540px;margin:auto;padding:8px 12px 4px}
.pen-board{display:block;width:100%;height:auto;overflow:visible}
.notebook-paper{background:#f7f9fd;border:1px solid #e0e6ef;border-radius:12px;padding:22px 18px 15px;min-width:0}
.steps-heading{font-size:1rem;margin:0 0 16px;color:#213451}
.notebook-paper .solution-steps{list-style:decimal;margin:0;padding-left:24px;font-family:Arial,Helvetica,sans-serif;font-size:1rem;line-height:1.75;color:#213451}
.notebook-paper .notebook-step{display:list-item;padding:5px 7px;margin:0 0 12px;border-radius:6px;overflow-wrap:anywhere;transition:background .15s}
.notebook-paper .notebook-step[data-state=writing]{background:#e2f2ef}
.notebook-paper .notebook-step::marker{font-weight:700;color:#087f78}
.notebook-paper .solution-answer{font-family:Arial,Helvetica,sans-serif;background:#eaf1ff;border:1px solid #ccd9f4;border-radius:8px;padding:12px;margin:18px 0 0;font-size:1.0625rem}
.solution-explanation{min-width:0;border-left:3px solid #e3eaf6;padding-left:18px}
.solution-explanation h4{font-size:1rem;line-height:1.4;margin:0 0 10px;color:var(--ink)}
.solution-explanation h4:not(:first-child){margin-top:22px}
.solution-explanation p,.solution-explanation .solution-method{font-size:1rem;line-height:1.7;margin:0 0 15px;color:#405476}
.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}
@keyframes score-appear{from{transform:scale(.88);opacity:.4}to{transform:scale(1);opacity:1}}
@media(max-width:850px){.solution-layout{grid-template-columns:minmax(0,1fr)}.solution-explanation{border-left:0;border-top:1px solid var(--line);padding:20px 0 0}}
@media(max-width:650px){.notebook-solution.worked-solution{padding:17px 13px}.solution-heading{align-items:flex-start;flex-wrap:wrap}.solution-heading h3{font-size:1.125rem}.notebook-paper{padding:18px 12px}.notebook-paper .solution-steps{font-size:1rem;line-height:1.75}.notebook-paper .notebook-step{gap:8px;margin-bottom:20px}.notebook-controls button{padding:9px 10px}.scoring-rules>summary{padding:16px 17px}}
@media(prefers-reduced-motion:reduce){.solution-award{animation:none}}
@media(max-width:700px){
 .home-page .site-header{flex-direction:column;align-items:flex-start;gap:16px;padding:20px 0 16px}
 .home-page .site-header nav{justify-content:space-between;width:100%;gap:16px;font-size:.875rem}
 .home-page main,.home-page .site-header,.home-page footer{width:calc(100% - 32px)}
 .home-intro{padding:22px 0 18px}
 .home-intro h1{max-width:400px}
 .path-settings>summary{padding:15px;align-items:flex-start;gap:14px}
 .settings-label{font-size:.875rem;max-width:105px;line-height:1.4}
 .path-settings-body{grid-template-columns:1fr;padding:18px 15px;gap:24px}
 .path-settings .level-buttons{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}
 .path-settings .level-button{justify-content:center;padding:12px 6px;text-align:center;min-width:0}
 .path-settings .level-icon,.path-settings .level-button small{display:none}
 .path-settings .level-button strong{font-size:1rem}
 .path-settings .path-switch button{font-size:.875rem;padding:11px}
 .path-settings .mission-buttons{grid-template-columns:repeat(2,minmax(0,1fr))}
 .settings-footer{padding:16px;flex-direction:column;align-items:stretch;gap:12px}
 .settings-footer p{max-width:none}
 .home-page .game-top{padding:15px 17px;align-items:flex-start}
 .home-page .tag{line-height:1.5}
 .home-page .progress-meta{padding:17px 17px 9px;gap:12px;flex-wrap:wrap}
 .home-page .progress-track{margin:0 17px}
 .home-page #question-area{padding:20px 17px}
 .home-page .game-bottom{padding:13px 17px;align-items:flex-start;flex-wrap:wrap;gap:10px}
 .home-page .choice{min-width:0;overflow-wrap:anywhere}
 .home-page .choice-value{font-size:1.125rem}
 .home-page .game-actions{gap:13px 20px}
 .home-progress>summary{padding:17px}
 .progress-content{padding:18px 17px}
 .home-progress .session-stats{gap:14px;grid-template-columns:1fr}
 .home-resources{grid-template-columns:1fr;gap:0;border-block:1px solid var(--line);margin:20px 0}
 .home-resources>a{display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px 14px;border:0;border-radius:0;padding:16px 0}
 .home-resources>a+a{border-top:1px solid var(--line)}
 .home-page footer{gap:14px;align-items:flex-start;flex-direction:column}
}

.question-lesson-link{display:inline-block;font-size:.9375rem;font-weight:700;color:#2847df;line-height:1.5;padding:10px 0;margin:0 0 8px;text-underline-offset:3px}

.voice-preferences{border:1px solid #d7e1ee;border-radius:10px;background:#f6f9fd;margin:10px 0 14px;padding:11px 13px;color:#213b5b;text-align:left}
.voice-preferences summary{font-size:.9375rem;line-height:1.5;font-weight:700;cursor:pointer}
.voice-preferences-body{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(0,1fr);gap:14px;padding-top:15px}
.voice-preferences-body label{font-size:.875rem;font-weight:700;line-height:1.5;min-width:0}
.voice-preferences-body select{display:block;width:100%;min-width:0;margin-top:6px;border:1px solid #bccde2;border-radius:8px;background:#fff;color:#213b5b;padding:10px 8px;font:inherit;font-size:.9375rem;min-height:42px}
.voice-sample-actions{display:flex;flex-wrap:wrap;gap:9px;grid-column:1/-1}
.voice-sample-actions button{font:inherit;font-size:.9375rem;line-height:1.5;border:1px solid #bfcee4;border-radius:8px;background:#fff;color:#2847df;padding:9px 12px;min-height:42px}
.voice-sample-actions button:first-child{background:#e9f0ff;font-weight:700}.voice-sample-actions button:disabled{opacity:.5;cursor:default}
.voice-preferences-body #voice-choice-note{grid-column:1/-1;font-size:.875rem;line-height:1.6;color:#506481;margin:0}
@media(max-width:600px){.voice-preferences-body{grid-template-columns:minmax(0,1fr)}.voice-sample-actions button{flex:1}}