@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Manrope:wght@400;500;600;700;800&display=swap');
:root{--paper:#f6f5ef;--ink:#20281f;--muted:#777d72;--lime:#c7ed81;--line:#dedfd5}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:'DM Sans',sans-serif}button,input{font:inherit}button,a,input{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:focus-visible,a:focus-visible{outline:3px solid #6b9437;outline-offset:4px}.top{max-width:1240px;margin:auto;display:flex;align-items:center;justify-content:space-between;padding:26px 40px;border-bottom:1px solid var(--line)}.brand{text-decoration:none;color:var(--ink);display:flex;align-items:center;gap:10px;font-size:25px;font-weight:700;letter-spacing:-1px}.brandmark{width:38px;height:38px;background:var(--lime);border-radius:11px;display:grid;place-items:center;position:relative;font-size:30px}.brandmark span{position:absolute;right:5px;bottom:0}.brand-dot{font-size:11px;align-self:flex-start;letter-spacing:0;margin-top:5px;margin-left:-7px}nav{display:flex;align-items:center;gap:12px}.nav-tag{font-size:10px;letter-spacing:1.6px;margin-right:20px}.icon{height:33px;width:33px;border:1px solid #c9cec1;background:transparent;border-radius:50%;font-weight:600}main{max-width:1120px;margin:auto;padding:0 40px}.intro{padding:55px 0 35px}.eyebrow{font-size:10px;font-weight:700;letter-spacing:2px;display:flex;align-items:center;gap:8px}.live-dot,.small-dot{width:6px;height:6px;background:#85a855;display:inline-block;border-radius:50%}h1{font-family:'Manrope',sans-serif;font-weight:800;font-size:clamp(38px,5vw,60px);line-height:1.12;letter-spacing:-2.8px;margin:21px 0 20px}h1 span{color:#8c967d}.intro p{font-size:14px;line-height:1.8;color:#6c7466;margin:0}.play-layout{display:grid;grid-template-columns:1.8fr 1fr;gap:28px}.game{background:#fff;border:1px solid var(--line);border-radius:17px;padding:24px 27px 0;box-shadow:0 6px 22px #25351905;overflow:hidden}.game-meta{display:flex;justify-content:space-between;align-items:center;font-size:10px;letter-spacing:1px;font-weight:600}.pill{border:1px solid var(--line);border-radius:5px;padding:6px 9px;font-size:8px;color:#647057}.progress{display:flex;gap:7px;margin:22px 0}.step{height:5px;background:#eceee7;border-radius:3px;flex:1}.step.active{background:#8eaa63}.step.correct{background:#98c95a}.step.wrong{background:#dc9a87}.step.skip{background:#d3c8ad}#stage{min-height:286px;display:flex;flex-direction:column;align-items:center;text-align:center;justify-content:center;padding:4px 0 22px}.level-label{font-size:10px;letter-spacing:1.6px;color:#758265;font-weight:600}.starter-art{width:70px;height:70px;display:flex;align-items:center;justify-content:center;background:#f0f5e7;border-radius:18px;transform:rotate(-8deg);font-size:43px;font-weight:700;margin:12px 0 10px}.starter-art span{transform:rotate(8deg)}h2{font-family:'Manrope',sans-serif;font-size:23px;letter-spacing:-.8px;line-height:1.35;margin:12px 0}#stage p{color:#78806f;font-size:12px;line-height:1.7;margin:0 0 18px}.primary{background:var(--lime);border:0;border-radius:9px;color:var(--ink);padding:14px 22px;min-width:220px;display:inline-flex;align-items:center;justify-content:space-between;font-weight:700;font-size:12px;gap:30px}.primary:hover{background:#b8e36d}.quiet{border:0;background:none;color:#79816f;font-size:11px;padding:10px;text-decoration:underline;text-underline-offset:3px}.tiny{font-size:9px;color:#929888;margin-top:12px}.game-bottom{display:flex;justify-content:space-between;align-items:center;border-top:1px solid #edf0e8;padding:16px 0;color:#8a9282;font-size:8px;letter-spacing:.7px}.game-bottom .small-dot{height:4px;width:4px;margin-right:4px}#timer{font-size:12px;color:#536047;font-variant-numeric:tabular-nums;letter-spacing:.8px}aside{display:flex;flex-direction:column;gap:14px}.side-note{background:#eceee3;border:1px solid #e1e4d7;border-radius:14px;padding:22px}.note-icon{font-size:20px;color:#7e8a6b}.side-note h2{margin:8px 0 12px;font-size:23px}.side-note p{color:#808674;font-size:12px;line-height:1.8;max-width:235px}.difficulty{display:flex;align-items:center;gap:8px;margin-top:22px;white-space:nowrap}.difficulty>span{font-size:7px;letter-spacing:.4px}.difficulty>div{display:flex;align-items:flex-end;gap:3px;flex:1;justify-content:center}.difficulty i{width:13px;background:#b5c59a;border-radius:2px;height:7px}.difficulty i:nth-child(2){height:11px}.difficulty i:nth-child(3){height:15px}.difficulty i:nth-child(4){height:19px}.difficulty i:nth-child(5){height:23px;background:#557442}.streak-card{border:1px solid var(--line);border-radius:12px;display:flex;align-items:center;padding:17px 15px;gap:11px}.streak-icon{font-size:33px;color:#698449}.streak-card strong{font-size:15px}.streak-card p{font-size:9px;color:#8d9483;margin:4px 0 0}.streak-end{font-size:8px;color:#8b927e;margin-left:auto}.tomorrow{text-align:center;padding:10px}.tomorrow>span{font-size:8px;letter-spacing:1.5px;color:#89917e}.tomorrow strong{font-family:'Manrope',sans-serif;display:block;font-size:25px;letter-spacing:3px;font-weight:500;margin:7px;font-variant-numeric:tabular-nums}.tomorrow small{font-size:8px;color:#929986}.features{display:grid;grid-template-columns:repeat(3,1fr);gap:34px;margin:40px 0 45px;border-top:1px solid var(--line);padding-top:24px}.feature-num{font-size:10px;color:#a0a890}h3{font-size:12px;margin:10px 0 6px}.features p{font-size:10px;color:#838b79;line-height:1.6;margin:0}footer{max-width:1040px;margin:auto;border-top:1px solid var(--line);padding:22px 0 30px;display:flex;align-items:center;gap:22px;color:#919986;font-size:9px}.footer-logo{font-size:15px;font-weight:700;color:#59634e;letter-spacing:-.6px}.footer-logo span{color:#a4c56c}footer button{margin-left:auto;border:0;background:transparent;font-size:9px;color:#748067}.equation{font-family:'Manrope',sans-serif;font-size:clamp(30px,5vw,45px);font-weight:700;letter-spacing:-1px;margin:24px 0}.context{font-size:12px;color:#69765d;margin:16px 0 -10px}.answer-form{display:flex;gap:8px;max-width:100%;width:320px}.answer-form input{width:100%;min-width:0;border:1px solid #ced6c3;border-radius:9px;padding:13px;font-size:18px;text-align:center;background:#fafbf7;color:var(--ink)}.answer-form input:focus{outline:2px solid #b5d98b}.answer-form button{min-width:85px;justify-content:center;padding:12px}.error{color:#aa5038!important;margin:8px!important;font-size:11px!important}.result-score{font-family:'Manrope',sans-serif;font-size:47px;font-weight:800;letter-spacing:-2px;margin:8px}.result-score small{font-size:23px;color:#9ca58d}.result-list{display:flex;gap:7px;margin:8px 0 14px}.result-tile{display:grid;place-items:center;width:35px;height:35px;border-radius:8px;background:#e8f2d9;color:#527139}.result-tile.bad{background:#f6e5de;color:#a45a42}.result-tile.skipped{background:#eeeade;color:#8a7952}.answers{width:100%;text-align:left;border-top:1px solid var(--line);margin-top:15px}.answer-row{padding:9px 0;border-bottom:1px solid #eef0e9;display:flex;gap:8px;font-size:11px;align-items:center}.answer-row span{flex:1}.answer-row b{color:#6b8151}.answer-row small{color:#8c9286}dialog{border:1px solid var(--line);border-radius:18px;padding:30px;max-width:440px;width:calc(100% - 32px);color:var(--ink);background:var(--paper);box-shadow:0 30px 100px #17251230}dialog::backdrop{background:#20281f66;backdrop-filter:blur(4px)}dialog p,dialog li{font-size:13px;line-height:1.8;color:#707963}dialog ul{padding-left:18px}.close{position:absolute;top:10px;right:15px;background:none;border:0;font-size:24px;color:#707963}.stat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;text-align:center;margin:28px 0}.stat-grid b{font-size:30px;display:block}.stat-grid span{font-size:10px;color:#7d866f}.modal-note{font-size:10px!important}.share-status{font-size:10px;margin-top:10px;color:#6c7f50;min-height:14px}@media(min-width:1400px){.intro{padding-top:70px}.top{max-width:1320px}}@media(max-width:700px){.top{padding:20px}.nav-tag{display:none}main{padding:0 20px}.intro{padding:35px 0 27px}h1{font-size:43px;letter-spacing:-2px}.intro p{font-size:12px}.play-layout{grid-template-columns:1fr;gap:20px}.game{padding:20px 20px 0}.game-meta{font-size:9px}#stage{min-height:290px}.side-note{display:none}aside{display:grid;grid-template-columns:1fr 1fr;gap:10px}.streak-card{padding:12px}.streak-end{display:none}.tomorrow{padding:5px}.tomorrow strong{font-size:19px}.tomorrow>span{font-size:6px}.features{gap:15px;margin:30px 0}.features h3{font-size:11px;line-height:1.6}.features p{font-size:9px}footer{margin:0 20px;gap:12px}.desktop{display:none}.brand{font-size:22px}}
footer a{color:#748067;text-decoration:none}footer a:hover{text-decoration:underline}.article{max-width:850px;padding-top:55px;padding-bottom:65px}.article h1{font-size:44px}.article h2{margin-top:35px}.article p,.article li{font-size:15px;line-height:1.9;color:#65705c}.article a{color:#425c2e}.article article{border-top:1px solid var(--line);padding-top:30px;margin-top:40px}.notice{padding:15px;background:#eceee3;border-radius:9px;font-size:12px!important}@media(max-width:700px){footer{flex-wrap:wrap}footer button{margin-left:0}.article h1{font-size:36px}}

.geometry-figure{margin:14px 0 0;width:250px;max-width:100%}.geometry-figure svg{width:100%;max-height:132px;display:block;overflow:visible}.geometry-figure path,.geometry-figure rect{fill:#edf5df;stroke:#718b50;stroke-width:1.7;stroke-linejoin:round}.geometry-figure .guide{fill:none;stroke:#8e9c7c;stroke-dasharray:4 3;stroke-width:1.2}.geometry-figure .right-angle{fill:none;stroke-width:1}.geometry-figure text{font-size:12px;fill:#425235;font-family:'DM Sans',sans-serif}.geometry-figure figcaption{font-size:8px;color:#8a947c;margin-top:2px}.context{max-width:430px;line-height:1.8;font-size:13px;margin:14px 0 0}.equation.mixed-equation{font-size:clamp(24px,4.3vw,35px);margin:19px 0;line-height:1.4}.geometry-figure+.equation.mixed-equation{font-size:26px;margin:12px 0}.answer-row{flex-wrap:wrap}.answer-row small{flex-basis:100%;line-height:1.6}@media(max-width:700px){.context{font-size:12px}.equation.mixed-equation{font-size:26px}.geometry-figure svg{max-height:115px}}

.analytics-choice{position:fixed;bottom:18px;left:50%;transform:translateX(-50%);width:min(720px,calc(100% - 28px));background:#fff;border:1px solid #cdd7bf;border-radius:13px;padding:18px 20px;box-shadow:0 8px 40px #20281f26;z-index:100;display:flex;align-items:center;gap:20px}.analytics-choice strong{font-size:13px}.analytics-choice p{font-size:11px;line-height:1.6;margin:6px 0 0;color:#65705c}.analytics-choice a{color:#425c2e}.analytics-actions{display:flex;gap:8px;flex-shrink:0}.analytics-actions button{border:1px solid #ced6c3;border-radius:7px;background:#f1f5e9;padding:10px 12px;font-size:11px;color:#33452a}.analytics-actions button:last-child{background:#c7ed81}@media(max-width:600px){.analytics-choice{align-items:stretch;flex-direction:column;gap:12px;bottom:10px;padding:15px}.analytics-actions button{flex:1}}