@font-face{font-family:"Sofia Sans";font-style:normal;font-weight:100 1000;font-display:swap;src:url("../fonts/sofia-sans-var-cyrillic.woff2") format("woff2");unicode-range:U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}
@font-face{font-family:"Sofia Sans";font-style:normal;font-weight:100 1000;font-display:swap;src:url("../fonts/sofia-sans-var-latin.woff2") format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+2070-209F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215}
@font-face{font-family:"Sofia Sans Condensed";font-style:normal;font-weight:100 1000;font-display:swap;src:url("../fonts/sofia-sans-cond-var-cyrillic.woff2") format("woff2");unicode-range:U+0400-045F,U+2116}
@font-face{font-family:"Sofia Sans Condensed";font-style:normal;font-weight:100 1000;font-display:swap;src:url("../fonts/sofia-sans-cond-var-latin.woff2") format("woff2");unicode-range:U+0000-00FF,U+2000-206F,U+2070-209F,U+2212}
@font-face{font-family:"Source Sans 3";font-style:normal;font-weight:200 900;font-display:swap;src:url("../fonts/source-sans-3-var-cyrillic.woff2") format("woff2");unicode-range:U+0400-045F,U+2116}
@font-face{font-family:"Source Sans 3";font-style:normal;font-weight:200 900;font-display:swap;src:url("../fonts/source-sans-3-var-latin.woff2") format("woff2");unicode-range:U+0000-00FF,U+2000-206F,U+2070-209F,U+2212}
:root{--ink:#16130F;--ink-soft:#4A423B;--ink-faint:#756B61;--paper:#FFFDFA;--paper-tint:#F7F1E8;--red:#D2121C;--orange:#F15A29;--line:#E3DACE;--cell:rgba(22,19,15,.045);--success:#1F7A4C;--head:"Sofia Sans",Arial,sans-serif;--body:"Source Sans 3",Arial,sans-serif;--num:"Sofia Sans Condensed",Arial,sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth;font-feature-settings:"locl" 1;-webkit-text-size-adjust:100%}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--body);font-size:17px;line-height:1.5}button,input,select{font:inherit}button,a,input,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:default;opacity:.45}a{color:inherit}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid var(--red);outline-offset:4px}button{touch-action:manipulation}h1,h2,h3,h4,p{margin:0}h1,h2,h3,h4{font-family:var(--head);line-height:1.04}h1{font-size:clamp(2.4rem,5.5vw,4.6rem);font-weight:900;letter-spacing:-.04em}h2{font-size:clamp(1.7rem,3.4vw,2.4rem);font-weight:900;letter-spacing:-.025em}h3{font-size:1.5rem;font-weight:850;letter-spacing:-.02em}sup{font-size:.58em;vertical-align:super;line-height:0}img,svg{max-width:100%}.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}.skip{position:fixed;z-index:10;top:-80px;left:16px;padding:12px;background:var(--paper)}.skip:focus{top:12px}
.site-header,.site-footer{width:min(1200px,calc(100% - 64px));margin:auto;display:flex;align-items:center;justify-content:space-between;gap:24px}.site-header{min-height:94px;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;font-family:var(--head);font-size:31px;font-weight:900;letter-spacing:-.04em}.brand-dot{color:var(--orange)}.header-label,.eyebrow,.tag,.card-meta,.stage-label,.small-label{font-family:var(--num);font-size:13px;font-weight:800;letter-spacing:.12em;text-transform:uppercase}.header-label{color:var(--ink-faint)}.parent-link{font-size:15px;text-decoration:none;min-height:44px;display:flex;gap:12px;align-items:center}.parent-link:hover{color:var(--red)}.site-footer{padding:32px 0;margin-top:64px;border-top:1px solid var(--line);font-size:14px;color:var(--ink-faint)}.site-footer a{text-decoration:none}main{width:min(1120px,calc(100% - 64px));margin:auto;min-height:70vh}.loading{padding:64px 24px}.eyebrow{color:var(--ink-faint);margin-bottom:16px}.eyebrow .dash{display:inline-block;width:24px;height:3px;vertical-align:middle;background:var(--orange);margin-right:10px}.orange{color:var(--orange)}.red{color:var(--red)}.muted{color:var(--ink-faint)}.lede{font-size:19px;line-height:1.5;max-width:46ch;color:var(--ink-soft)}.math{font-family:var(--num);font-weight:850;font-variant-numeric:tabular-nums;letter-spacing:-.025em}.math-big{font-size:clamp(2.5rem,6vw,4rem);line-height:1.25}.math-mid{font-size:30px;line-height:1.4}.mono{font-family:var(--num);font-variant-numeric:tabular-nums}.btn{min-height:48px;display:inline-flex;align-items:center;justify-content:center;gap:12px;padding:12px 20px;border:1px solid var(--ink);border-radius:4px;font-weight:650;font-size:17px;line-height:1.25;background:var(--paper);color:var(--ink);text-decoration:none;transition:background .15s ease-out,border-color .15s ease-out}.btn:hover:not(:disabled){background:var(--paper-tint)}.btn.primary{background:var(--red);border-color:var(--red);color:var(--paper)}.btn.primary:hover:not(:disabled){background:var(--ink);border-color:var(--ink)}.btn.quiet{border-color:var(--line)}.btn.small{font-size:15px;padding:10px 16px;min-height:48px}.arrow{font-size:24px;line-height:1}.link{color:var(--red);text-underline-offset:4px}.row{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.stack{display:grid;gap:12px}.space{margin-top:24px}.micro{font-size:14px;color:var(--ink-faint)}
/* A printed playroom: one oversized invitation, a daily strip, then the collection. */
.hero{display:grid;grid-template-columns:1.05fr 1fr;gap:48px;padding:56px 0 40px;align-items:center}.hero h1{margin-bottom:24px}.hero .lede{margin-bottom:28px}.hero-note{display:flex;gap:20px;margin-top:20px;font-size:14px;color:var(--ink-faint)}.hero-note span:before{content:'+';color:var(--ink);margin-right:6px}.hero-art{margin-right:8px;position:relative;min-height:330px;background:var(--paper-tint);border:1px solid var(--line);border-radius:2px;padding:28px;display:grid;align-content:center;gap:14px;transform:rotate(1deg)}.grid-paper{background-image:linear-gradient(var(--cell) 1px,transparent 1px),linear-gradient(90deg,var(--cell) 1px,transparent 1px);background-size:22px 22px}.art-top{display:flex;justify-content:space-between;align-items:center;gap:12px}.hero-art .math{font-size:88px;line-height:1.2;text-align:center}.crossed{position:relative;display:inline-block}.crossed:after{content:'';height:4px;position:absolute;left:-8%;width:116%;top:56%;background:var(--red);transform:rotate(-14deg)}.stamp{font-family:var(--head);font-weight:900;font-size:30px;letter-spacing:-.02em;border:3px solid var(--red);color:var(--red);padding:4px 14px;transform:rotate(-9deg);width:max-content;justify-self:end;background:var(--paper)}.art-bottom{display:flex;justify-content:space-between;align-items:center;color:var(--ink-soft);font-size:15px}.pencil{width:120px;height:9px;background:var(--orange);position:absolute;right:12px;bottom:32px;transform:rotate(-36deg);border:1px solid var(--ink)}.pencil:after{content:'';position:absolute;right:-18px;top:-1px;border-top:5px solid transparent;border-bottom:5px solid transparent;border-left:18px solid var(--ink)}
.daily{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:24px;padding:22px 28px;border-top:1px solid var(--ink);border-bottom:1px solid var(--ink);margin:8px 0 48px}.daily-number{font-family:var(--num);font-size:44px;line-height:1;font-weight:900;color:var(--orange)}.daily p{font-size:16px;color:var(--ink-soft);margin-top:4px}.daily h3{font-size:21px}.collection-top{display:flex;justify-content:space-between;align-items:end;gap:16px;margin-bottom:24px}.progress-count{font-family:var(--num);font-size:25px;font-weight:800;white-space:nowrap}.progress-count small{font-family:var(--body);font-size:14px;font-weight:400;color:var(--ink-faint);margin-left:8px}.filters{display:flex;gap:8px;flex-wrap:wrap;padding-bottom:24px}.filter{min-height:48px;background:transparent;border:1px solid var(--line);border-radius:4px;padding:8px 16px;font-size:15px;color:var(--ink-soft)}.filter.active{background:var(--ink);border-color:var(--ink);color:var(--paper)}.cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}.game-card{text-decoration:none;border:1px solid var(--line);border-radius:2px;overflow:hidden;display:flex;flex-direction:column;transition:border-color .15s ease-out}.game-card:hover{border-color:var(--ink)}.card-art{height:160px;position:relative;display:flex;align-items:center;justify-content:center;overflow:hidden;background:var(--paper-tint);border-bottom:1px solid var(--line)}.card-art svg{width:100%;height:100%}.card-art .art-symbol{font-family:var(--num);font-size:55px;font-weight:900;letter-spacing:-.03em;line-height:1}.card-art .art-symbol small{font-size:22px;display:block;letter-spacing:.1em;margin-top:10px;text-align:center;color:var(--ink-faint)}.card-number{position:absolute;left:16px;top:12px;font-family:var(--num);font-size:14px;font-weight:800;color:var(--ink-faint)}.card-done{position:absolute;right:12px;top:10px;color:var(--success);font-size:20px}.card-info{padding:20px;flex:1;display:flex;flex-direction:column}.card-meta{display:flex;justify-content:space-between;color:var(--ink-faint);letter-spacing:.08em;font-size:12px;margin-bottom:12px}.card-info h3{font-size:24px;margin-bottom:10px}.card-info p{font-size:16px;color:var(--ink-soft);line-height:1.4;flex:1}.card-foot{display:flex;justify-content:space-between;align-items:center;margin-top:20px;font-size:14px;color:var(--ink-faint)}.card-foot .arrow{color:var(--red)}.collection-note{margin-top:24px;font-size:14px;color:var(--ink-faint)}
/* Game shell: the toy stays in the foreground; hints wait in the margin. */
.game-topline{display:flex;justify-content:space-between;align-items:center;padding:24px 0;gap:16px}.back{display:inline-flex;align-items:center;gap:10px;min-height:44px;font-size:15px;text-decoration:none}.back:hover{color:var(--red)}.game-heading{margin:12px 0 32px;max-width:800px}.game-heading h1{font-size:clamp(2.1rem,4.8vw,3.5rem);margin-bottom:14px}.game-heading p{font-size:19px;color:var(--ink-soft);max-width:55ch}.game-layout{display:grid;grid-template-columns:minmax(0,1fr) 264px;gap:32px;align-items:start}.play-panel{min-width:0;border:1px solid var(--line);border-top:3px solid var(--ink);border-radius:2px;background:var(--paper);overflow:hidden}.play-panel.won{border-top-color:var(--success)}.stage-header{display:flex;justify-content:space-between;align-items:center;padding:18px 24px;border-bottom:1px solid var(--line);gap:12px}.stage-label{color:var(--ink-faint);font-size:12px;letter-spacing:.1em}.round-dots{display:flex;gap:5px}.round-dots i{width:18px;height:3px;background:var(--line)}.round-dots i.active{background:var(--orange)}.arena{padding:28px;min-height:300px}.arena h3{font-size:22px;margin-bottom:16px}.arena p.instruction{font-size:16px;color:var(--ink-soft);margin:0 0 24px}.game-controls{padding:0 28px 28px}.game-controls:empty{display:none}.feedback{margin:0 28px 24px;padding:16px 18px;border-left:3px solid var(--red);background:var(--paper-tint);font-size:17px;line-height:1.45}.feedback.good{border-color:var(--success)}.feedback strong{display:block;font-family:var(--head);font-size:21px;font-weight:800;margin-bottom:4px}.feedback.empty{display:none}.round-footer{padding:20px 28px;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;background:var(--paper-tint)}.round-footer p{color:var(--ink-soft);font-size:15px}.side-note{border-top:1px solid var(--ink);padding-top:20px}.side-note .small-label{color:var(--ink-faint)}.side-note h3{margin:12px 0;font-size:25px}.side-note p{font-size:16px;color:var(--ink-soft);line-height:1.5}.side-note details{border-top:1px solid var(--line);margin-top:24px;padding:16px 0}.side-note summary{cursor:pointer;min-height:44px;font-weight:650}.side-note details p{margin:8px 0}.side-illustration{height:112px;background:var(--paper-tint);margin-top:24px;display:flex;align-items:center;justify-content:center;border:1px solid var(--line)}.side-illustration .math{font-size:44px}.next-links{display:grid;gap:8px;margin-top:20px}.next-links a{font-size:15px;min-height:44px;display:flex;align-items:center;justify-content:space-between;text-decoration:none;border-bottom:1px solid var(--line)}
.choices{display:flex;flex-wrap:wrap;gap:10px}.choice{flex:1 1 120px;min-height:52px;padding:12px 16px;border:1px solid var(--line);border-radius:4px;background:var(--paper);color:var(--ink);text-align:center}.choice:hover:not(:disabled){border-color:var(--ink);background:var(--paper-tint)}.choice.selected{border-color:var(--ink);background:var(--ink);color:var(--paper)}.choice.math{font-size:27px}.choice.correct{border-color:var(--success);color:var(--success)}.toolbox{border-top:1px dashed var(--line);padding-top:20px;margin-top:24px}.toolbox .small-label{display:block;margin-bottom:12px;color:var(--ink-faint)}.stepper{display:grid;grid-template-columns:48px 1fr 48px;align-items:center;min-width:130px;gap:4px}.stepper button{width:48px;height:48px;border:1px solid var(--line);background:var(--paper);border-radius:4px;font-size:24px}.stepper output{font-family:var(--num);font-size:32px;font-weight:900;text-align:center}.dial-label{font-size:14px;color:var(--ink-faint);margin-bottom:8px;display:block}.dials{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin:24px 0}.board{background:var(--paper-tint);border:1px solid var(--line);padding:24px;min-height:160px;border-radius:2px}.center{text-align:center}.target-label{display:flex;align-items:center;justify-content:center;gap:12px;font-size:14px;color:var(--ink-faint);margin-bottom:20px}.target-label strong{font-family:var(--num);font-size:32px;color:var(--ink);font-weight:900;line-height:1}.equation{display:flex;align-items:center;justify-content:center;gap:12px;flex-wrap:wrap;min-height:90px}.equation .equals{font-size:30px;color:var(--ink-faint)}.explanation{margin-top:20px;padding-top:16px;border-top:1px solid var(--line);font-size:16px;color:var(--ink-soft)}
/* Specific toys */
.solution{display:grid;gap:8px}.solution-step{display:flex;align-items:center;text-align:left;gap:16px;width:100%;padding:16px;border:1px solid var(--line);border-radius:4px;background:var(--paper);min-height:64px;color:var(--ink)}.solution-step .step-no{font-family:var(--num);font-size:14px;color:var(--ink-faint);width:20px;flex-shrink:0}.solution-step .math{font-size:30px;line-height:1.25}.solution-step:hover:not(:disabled){border-color:var(--red)}.solution-step.caught{border:2px solid var(--red);background:var(--paper-tint)}.teacher-bar{display:flex;gap:12px;align-items:center;margin-bottom:24px}.teacher-bar img{width:48px;height:48px;object-fit:cover;object-position:center 25%;border:1px solid var(--line);border-radius:2px;filter:grayscale(.12)}.teacher-bar p{font-size:16px}.teacher-bar small{display:block;font-size:13px;color:var(--ink-faint)}.lift{position:relative;height:184px;border-left:2px solid var(--ink);margin:0 24px 24px 48px;background:repeating-linear-gradient(to top,transparent 0,transparent 44px,var(--line) 44px,var(--line) 45px)}.lift-zero{position:absolute;top:50%;width:100%;border-top:1px dashed var(--ink-faint)}.lift-zero span{position:absolute;left:-28px;top:-14px;color:var(--ink-faint)}.lift-car{position:absolute;left:calc(50% - 38px);width:76px;height:54px;background:var(--paper);border:2px solid var(--orange);display:grid;place-items:center;font-family:var(--num);font-size:30px;font-weight:900;transition:bottom .2s ease-in-out}.lift-car:before{content:'';position:absolute;left:50%;bottom:100%;height:40px;border-left:1px solid var(--ink-faint)}.bracket-options{display:grid;grid-template-columns:1fr 1fr;gap:12px}.bracket-options button{font-size:36px;padding:20px 8px}.calc-screen{padding:20px;background:var(--ink);color:var(--paper);border-radius:2px;display:flex;justify-content:space-between;align-items:center;min-height:100px}.calc-screen .math{font-size:42px}.calc-screen small{color:var(--line);font-size:13px}.test-log{display:grid;gap:8px;margin-top:20px}.test-row{display:flex;justify-content:space-between;padding:10px 14px;border-bottom:1px solid var(--line);font-size:17px}.test-row .math{font-size:23px}.swarm{display:grid;grid-template-columns:repeat(9,1fr);gap:7px;align-content:center;min-height:156px;max-width:400px;margin:auto}.creature{height:22px;position:relative;background:var(--orange);border:1px solid var(--ink);border-radius:2px}.creature:after{content:'··';color:var(--ink);font-family:Arial;font-weight:900;position:absolute;top:-8px;left:25%;font-size:25px;letter-spacing:3px}.swarm-count{font-size:60px;margin-top:12px;line-height:1}.copy-history{display:flex;justify-content:center;gap:8px;flex-wrap:wrap;margin-top:16px;font-family:var(--num);font-size:22px}.copy-history span.current{color:var(--red);font-weight:900}.safe-door{position:relative;margin:auto;border:8px double var(--ink);background:var(--paper-tint);padding:28px;max-width:340px;min-height:150px;display:flex;justify-content:space-between;align-items:center;gap:24px}.safe-door:before,.safe-door:after{content:'';position:absolute;left:-13px;width:14px;height:24px;background:var(--ink)}.safe-door:before{top:20px}.safe-door:after{bottom:20px}.safe-door .math{font-size:60px}.safe-wheel{width:58px;height:58px;border:3px solid var(--ink);border-radius:50%;position:relative}.safe-wheel:before,.safe-wheel:after{content:'';position:absolute;background:var(--ink);left:7px;right:7px;height:3px;top:25px}.safe-wheel:after{transform:rotate(90deg)}.safe-door.open{border-color:var(--success)}.key-slots{display:flex;justify-content:center;gap:8px;flex-wrap:wrap;margin-top:20px}.key-slot{border:1px dashed var(--ink-faint);padding:8px 14px;min-width:68px;font-family:var(--num);font-size:24px;text-align:center}.key-slot.found{border:1px solid var(--success);color:var(--success)}.factor-groups{display:flex;align-items:center;justify-content:center;gap:16px;flex-wrap:wrap}.factor-capsule{background:var(--paper);border:2px solid var(--ink);border-radius:4px;padding:20px;font-family:var(--num);font-size:40px;min-width:108px}.factor-chain{display:flex;gap:6px;align-items:center;justify-content:center;flex-wrap:wrap;min-height:70px}.factor{display:inline-grid;place-items:center;min-width:38px;height:44px;padding:4px 8px;background:var(--paper);border:1px solid var(--ink);font-family:var(--num);font-weight:850;font-size:28px;border-radius:2px}.factor.cancelled{text-decoration:line-through;color:var(--ink-faint);border-style:dashed}.fraction{display:grid;gap:12px;text-align:center;width:100%}.fraction>div:first-child{padding-bottom:12px;border-bottom:2px solid var(--ink)}.move-board{display:flex;align-items:center;justify-content:center;gap:16px;min-height:170px}.move-tile{width:72px;height:88px;font-family:var(--num);font-size:60px;font-weight:900;border:2px solid var(--ink);background:var(--paper);border-radius:4px;color:var(--ink)}.move-tile.exponent{width:54px;height:64px;font-size:42px;align-self:flex-start;margin-top:20px;margin-left:-10px}.move-tile.picked{border-color:var(--red);color:var(--red);outline:2px solid var(--red);outline-offset:2px}.tile-tray{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:20px}.power-card{min-height:84px;border:1px solid var(--ink);border-radius:4px;background:var(--paper);color:var(--ink);font-family:var(--num);font-size:36px;font-weight:850;position:relative}.power-card.selected{border:2px solid var(--red);background:var(--paper-tint)}.power-card.selected:after{content:'✓';position:absolute;right:7px;top:2px;font-size:16px;color:var(--red)}.token-strip{display:flex;flex-wrap:wrap;gap:8px;min-height:76px;justify-content:center;align-items:center}.token{padding:8px 12px;border-bottom:2px solid var(--ink);font-family:var(--num);font-size:28px}.token.op{border:0;color:var(--red)}.scale{height:150px;position:relative;margin:8px auto 28px;max-width:420px}.scale-base{position:absolute;bottom:0;left:calc(50% - 30px);width:60px;height:100px;clip-path:polygon(50% 0,100% 100%,0 100%);background:var(--ink)}.scale-beam{position:absolute;height:3px;background:var(--ink);width:90%;left:5%;top:40px;transition:transform .2s ease-in-out}.scale-pan{position:absolute;top:-28px;width:100px;min-height:64px;background:var(--paper);border-bottom:3px solid var(--orange);text-align:center;font-family:var(--num);font-size:36px;font-weight:850}.scale-pan.left{left:0}.scale-pan.right{right:0}.proof{padding:16px;border:1px dashed var(--ink-faint);margin-top:20px;overflow-wrap:anywhere}.timeline{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:24px 0}.time-step{padding:12px 8px;border:1px solid var(--line);border-radius:4px;background:var(--paper);min-height:88px;color:var(--ink)}.time-step.active{border:2px solid var(--red)}.time-step small{display:block;font-size:12px;color:var(--ink-faint);margin-bottom:6px}.time-step .math{font-size:26px}.rewind-icon{font-family:var(--num);font-size:48px;line-height:1;color:var(--orange)}.number-line{height:128px;position:relative;margin:16px 16px 32px;border-bottom:2px solid var(--ink)}.number-line:before{content:'';position:absolute;bottom:-9px;height:16px;left:50%;border-left:2px solid var(--ink)}.number-line .zero{position:absolute;top:100%;left:calc(50% - 4px);padding-top:8px;font-size:16px;color:var(--ink-faint)}.line-end{position:absolute;bottom:-31px;font-size:14px;color:var(--ink-faint)}.line-end.negative{left:0}.line-end.positive{right:0}.line-marker{position:absolute;bottom:12px;transform:translateX(-50%);background:var(--ink);color:var(--paper);padding:8px 14px;font-family:var(--num);font-size:30px;min-width:52px;text-align:center;border-radius:2px;transition:left .2s ease-in-out}.line-marker:after{content:'';position:absolute;left:calc(50% - 5px);bottom:-7px;border-left:5px solid transparent;border-right:5px solid transparent;border-top:7px solid var(--ink)}.loot-total{display:flex;align-items:center;justify-content:space-between;gap:16px;border-bottom:2px solid var(--ink);padding-bottom:16px}.loot-total .math{font-size:42px}.loot-meter{height:6px;background:var(--line);margin:20px 0 12px}.loot-meter i{display:block;height:100%;background:var(--orange);max-width:100%;transition:width .15s ease-out}.route-log{list-style:none;padding:0;margin:20px 0 0;display:grid;gap:8px}.route-log li{display:flex;align-items:center;gap:12px;color:var(--ink-soft);font-size:17px}.route-log li:before{content:'↓';color:var(--ink-faint)}.student-card{padding:24px;border:1px solid var(--line);background:var(--paper-tint);position:relative}.student-card h3{font-size:20px}.student-card blockquote{margin:16px 0 0;padding-left:16px;border-left:2px solid var(--orange);font-size:19px;color:var(--ink-soft)}.student-mark{position:absolute;right:20px;top:12px;color:var(--red);font-size:42px;font-family:var(--num);font-weight:900}.share-box{margin-top:20px;padding:16px;background:var(--paper-tint);border:1px solid var(--line)}.share-box label{display:block;font-size:14px;color:var(--ink-soft);margin-bottom:8px}.share-box input{display:block;width:100%;min-height:48px;padding:10px;background:var(--paper);color:var(--ink);border:1px solid var(--line);border-radius:4px;font-size:15px}.answer-input{display:flex;gap:12px;margin-top:24px}.answer-input input{min-width:0;width:100%;min-height:52px;border:1px solid var(--ink);border-radius:4px;padding:8px 16px;font-family:var(--num);font-size:28px}.finish{padding:40px 24px;text-align:center}.finish .seal{font-size:64px;color:var(--success);font-family:var(--num);line-height:1;margin-bottom:20px}.finish h2{margin-bottom:16px}.finish p{max-width:42ch;margin:0 auto 24px;color:var(--ink-soft)}.finish .row{justify-content:center}.parent-page{max-width:760px;padding-top:40px}.parent-page h1{margin:16px 0 24px}.parent-page p{margin-bottom:20px}.parent-page .board{margin-top:32px}.parent-page ul{padding-left:24px;line-height:1.8}.empty-collection{padding:32px;border:1px solid var(--line)}
@media(min-width:1000px){.game-card:nth-child(7n + 2) .card-art{background-color:var(--paper)}.game-card:nth-child(7n + 2) .card-art:before{content:'';position:absolute;inset:12px;border:1px solid var(--line)}}
@media(max-width:900px){.header-label{display:none}.hero{gap:28px}.hero-art .math{font-size:72px}.cards{grid-template-columns:repeat(2,minmax(0,1fr))}.game-layout{grid-template-columns:minmax(0,1fr) 220px;gap:24px}.arena{padding:24px}.game-controls{padding:0 24px 24px}.feedback{margin:0 24px 24px}.dials{gap:16px}}
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@media(max-width:390px){.site-header,.site-footer,main{width:calc(100% - 32px)}.cards{grid-template-columns:1fr}.game-card{display:grid;grid-template-columns:104px 1fr}.card-art{height:100%;min-height:165px;border-bottom:0;border-right:1px solid var(--line)}.card-art .art-symbol{font-size:31px}.card-art .art-symbol small{font-size:13px}.card-number{left:10px;top:8px}.card-art svg{min-width:220px}.card-info h3{font-size:23px}.card-info{padding:16px}.card-meta{margin-bottom:8px}.card-foot{margin-top:10px}.dials{gap:12px}.stepper{grid-template-columns:44px 1fr 44px;min-width:0}.stepper button{width:48px;height:48px}.arena{padding:20px 16px}.game-controls{padding:0 16px 20px}.feedback{margin:0 16px 20px}.board{padding:18px 12px}.solution-step{gap:10px;padding:12px}.solution-step .math{font-size:26px}.bracket-options button{font-size:32px}.math-big{font-size:42px}.choice{padding:12px}.time-step .math{font-size:23px}.hero-note{flex-wrap:wrap;gap:4px 12px}}
.solution-step:disabled,.bracket-options button:disabled,.time-step:disabled,.move-tile:disabled{opacity:1}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important}}