:root{color-scheme:light;--ink:#173b34;--muted:#58716a;--paper:#f7f7f1;--white:#fff;--line:#dce7df;--green:#176849;--green-dark:#124e38;--mint:#e4f3e8;--orange:#eb9a4a;--shadow:0 20px 60px rgba(22,62,50,.08);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);line-height:1.6}button,a{touch-action:manipulation}a{color:var(--green)}a:hover{text-decoration-thickness:2px}button{font:inherit}img{max-width:100%}.wrap{width:min(1180px,calc(100% - 40px));margin-inline:auto}.skip{position:absolute;top:-80px;left:12px;background:#fff;padding:10px;z-index:100}.skip:focus{top:8px}.site-header{background:rgba(247,247,241,.94);border-bottom:1px solid var(--line)}.nav{display:flex;align-items:center;justify-content:space-between;gap:22px;min-height:80px}.brand{display:inline-flex;align-items:center;gap:11px;text-decoration:none;color:var(--ink);font-size:1.06rem;font-weight:800;letter-spacing:-.03em;white-space:nowrap}.brand-mark{width:36px;height:36px;display:grid;grid-template-columns:repeat(3,1fr);gap:3px;transform:rotate(-8deg)}.brand-mark i{background:var(--green);border-radius:3px}.brand-mark i:nth-child(2),.brand-mark i:nth-child(6){background:var(--orange)}.brand-mark i:nth-child(5){background:#9bccab}.nav-links{display:flex;align-items:center;gap:28px}.nav-links a{text-decoration:none;color:var(--ink);font-size:.92rem;font-weight:600}.nav-links a:hover,.nav-links a[aria-current=page]{color:var(--green);text-decoration:underline;text-underline-offset:6px}.language{border:1px solid #bed1c3;border-radius:100px;padding:6px 12px!important}.hero{padding:70px 0 58px;display:grid;grid-template-columns:minmax(0,1fr) minmax(370px,520px);gap:6%;align-items:center}.eyebrow{display:inline-flex;gap:8px;align-items:center;font-size:.76rem;font-weight:800;letter-spacing:.14em;text-transform:uppercase;color:var(--green)}.eyebrow:before{content:"";width:8px;height:8px;background:var(--orange);border-radius:50%}h1,h2,h3{line-height:1.13;letter-spacing:-.045em}h1,h2{font-family:Georgia,"Times New Roman",serif;font-weight:700}h1{font-size:clamp(3rem,5.7vw,5.7rem);margin:19px 0 24px}h2{font-size:clamp(2rem,3.3vw,3.3rem);margin:0 0 18px}h3{font-size:1.2rem;margin:0 0 10px}.lead{color:#405e55;font-size:1.16rem;max-width:590px;margin:0 0 26px}.hero-points{list-style:none;margin:0;padding:0;display:flex;gap:11px;flex-wrap:wrap}.hero-points li{font-size:.83rem;font-weight:700;padding:7px 12px;background:#eaf1e8;border:1px solid #d7e4d9;border-radius:100px}.text-link{font-weight:700;text-underline-offset:4px}.hero-note{margin:22px 0 0;color:var(--muted);font-size:.92rem}.game-card{background:#fff;border:1px solid #dbe6dd;box-shadow:var(--shadow);border-radius:28px;padding:25px}.game-top{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;margin-bottom:17px}.game-top p{margin:0;color:var(--muted);font-size:.85rem;font-weight:700}.game-top strong{display:block;font-size:1.6rem;letter-spacing:-.04em}.game-top .timer{font-variant-numeric:tabular-nums}.game-top .next{color:var(--green)}.game-board{display:grid;grid-template-columns:repeat(var(--grid-size,5),minmax(0,1fr));gap:7px;aspect-ratio:1}.cell{min-width:0;aspect-ratio:1;border:1px solid #cee0d2;background:#f4f8f3;border-radius:10px;color:#1c4c3e;font-weight:800;font-size:clamp(.9rem,2.1vw,1.45rem);cursor:pointer;transition:background .14s,transform .14s}.cell:hover:not(:disabled),.cell:focus-visible{background:#dcefe2;transform:translateY(-2px);outline:2px solid var(--green);outline-offset:1px}.cell--found{background:#d9ecdf;color:#6d9680;box-shadow:inset 0 0 0 1px #c0dec9}.cell--wrong{animation:wrong .22s}@keyframes wrong{50%{background:#ffe1d4;transform:scale(.94)}}.board--dense{gap:4px}.board--dense .cell{border-radius:6px;font-size:clamp(.68rem,1.5vw,1rem)}.game-bottom{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-top:18px}.record{font-size:.84rem;color:var(--muted)}.record strong{display:block;color:var(--ink);font-size:1rem;font-variant-numeric:tabular-nums}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:var(--green);color:white;border:1px solid var(--green);border-radius:12px;padding:11px 18px;text-decoration:none;font-weight:800;cursor:pointer;line-height:1.2}.btn:hover{background:var(--green-dark);color:#fff}.btn--light{background:#fff;color:var(--green);border-color:#c9dacd}.btn--light:hover{background:var(--mint);color:var(--green)}.game-status{font-size:.82rem;color:var(--muted);min-height:1.5em;margin:10px 0 0}.section{padding:72px 0;border-top:1px solid var(--line)}.section-head{max-width:760px;margin-bottom:34px}.section-head p{color:var(--muted);margin:0}.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:27px}.card p{color:var(--muted);margin:0}.card-icon{width:40px;height:40px;display:grid;place-items:center;border-radius:10px;background:var(--mint);color:var(--green);font-size:1.25rem;font-weight:900;margin-bottom:21px}.size-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:12px}.size-tile{background:#fff;border:1px solid var(--line);border-radius:15px;padding:18px 10px;text-align:center;text-decoration:none;color:var(--ink);transition:transform .15s,border-color .15s}.size-tile:hover,.size-tile[aria-current=page]{transform:translateY(-3px);border-color:var(--green)}.size-tile strong{display:block;font-size:1.34rem;letter-spacing:-.04em}.size-tile span{display:block;color:var(--muted);font-size:.78rem;margin-top:2px}.steps{counter-reset:step;display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.step{background:#eaf2e9;border-radius:18px;padding:26px}.step:before{counter-increment:step;content:counter(step,decimal-leading-zero);display:block;font-family:Georgia,serif;color:var(--green);font-size:2.3rem;line-height:1;margin-bottom:16px}.step p{margin:0;color:var(--muted)}.prose{max-width:800px}.prose p,.prose li{color:#405e55}.prose p{margin:0 0 18px}.prose h2{margin-top:45px}.prose h3{margin-top:30px}.prose ul,.prose ol{padding-left:22px}.faq{display:grid;gap:13px}.faq details{background:white;border:1px solid var(--line);border-radius:14px;padding:18px 22px}.faq summary{cursor:pointer;font-weight:800}.faq p{color:var(--muted);margin:12px 0 0}.callout{background:#e4f2e8;border-left:4px solid var(--green);padding:20px 24px;border-radius:0 12px 12px 0;margin:28px 0;color:#2b5847}.page-hero{padding:65px 0 35px}.page-hero h1{font-size:clamp(2.8rem,5vw,4.8rem);max-width:850px}.page-hero .lead{max-width:790px}.article-layout{display:grid;grid-template-columns:minmax(0,770px) 260px;gap:75px;padding-bottom:80px}.side-card{align-self:start;position:sticky;top:20px;background:#fff;border:1px solid var(--line);border-radius:17px;padding:22px}.side-card h3{font-size:1rem}.side-card a{display:block;font-size:.88rem;margin-top:10px}.print-toolbar{display:flex;gap:12px;flex-wrap:wrap;margin:25px 0 30px}.print-grid-list{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}.print-sheet{background:white;border:1px solid var(--line);padding:25px;border-radius:15px;break-inside:avoid}.print-sheet h2{font-family:inherit;font-size:1.2rem;margin:0 0 12px}.print-board{display:grid;grid-template-columns:repeat(5,1fr);border:2px solid #1c3e34;aspect-ratio:1}.print-board span{display:grid;place-items:center;border:1px solid #1c3e34;font-size:1.25rem;font-weight:700}.print-sheet p{margin:10px 0 0;font-size:.85rem}.footer{background:#153d31;color:#d5e4da;padding:45px 0}.footer .brand{color:#fff}.footer-inner{display:flex;align-items:flex-start;justify-content:space-between;gap:30px}.footer a{color:#d5e4da}.footer-links{display:flex;flex-wrap:wrap;gap:14px 24px}.footer p{font-size:.85rem;color:#bdd2c5}.sources{font-size:.88rem}.sources a{word-break:break-word}.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}
@media(max-width:1000px){.hero{gap:4%;grid-template-columns:minmax(0,1fr) minmax(330px,470px)}.size-grid{grid-template-columns:repeat(4,1fr)}.article-layout{gap:35px;grid-template-columns:minmax(0,1fr) 220px}}
@media(max-width:750px){.wrap{width:min(100% - 28px,580px)}.nav{min-height:66px;align-items:flex-start;padding:15px 0;flex-direction:column;gap:13px}.nav-links{gap:15px;flex-wrap:wrap}.nav-links a{font-size:.82rem}.hero{display:flex;flex-direction:column;padding:44px 0;gap:30px}.hero-copy,.game-card{width:100%}h1{font-size:clamp(2.9rem,10vw,4.5rem)}.cards,.steps{grid-template-columns:1fr}.size-grid{grid-template-columns:repeat(3,1fr)}.section{padding:53px 0}.article-layout{display:block}.side-card{position:static;margin-top:40px}.page-hero{padding:45px 0 20px}.print-grid-list{grid-template-columns:1fr}.footer-inner{flex-direction:column}}
@media(max-width:420px){.game-card{padding:16px}.game-board{gap:4px}.cell{border-radius:7px;font-size:1rem}.board--dense .cell{font-size:.68rem}.size-grid{gap:7px}.size-tile{padding:12px 4px}.size-tile strong{font-size:1.1rem}.game-bottom{align-items:flex-start}.btn{padding:10px 12px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.cell,.size-tile{transition:none}.cell--wrong{animation:none}}
@media print{body{background:#fff;color:#000}.site-header,.footer,.print-toolbar,.page-hero .lead,.side-card{display:none!important}.wrap{width:100%}.page-hero{padding:0}.page-hero h1{font:22px Arial;margin:0 0 12px}.article-layout{padding:0}.print-grid-list{grid-template-columns:repeat(2,1fr);gap:12mm}.print-sheet{border:0;border-radius:0;padding:0}.print-board span{font-size:17pt}.print-sheet h2{font-size:14pt}a{color:#000;text-decoration:none}}
.language-menu{position:relative}.language-menu summary{list-style:none;cursor:pointer;border:1px solid #bed1c3;border-radius:100px;padding:6px 12px;font-weight:800;color:var(--green);font-size:.82rem}.language-menu summary::-webkit-details-marker{display:none}.language-menu summary:after{content:"⌄";margin-left:8px}.language-menu[open] summary{background:var(--mint)}.language-list{position:absolute;right:0;top:calc(100% + 8px);z-index:20;min-width:165px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);border-radius:12px;padding:7px}.language-list a{display:block;padding:8px 10px;border-radius:7px;white-space:nowrap}.language-list a:hover,.language-list a[aria-current=page]{background:var(--mint);text-decoration:none}
@media(max-width:750px){.language-list{right:auto;left:0}}
[hidden]{display:none!important}.game-promo{margin-top:18px;padding:21px;border:1px solid #c6e0cc;border-radius:17px;background:#edf7ee}.game-promo__eyebrow{display:block;font-size:.69rem;font-weight:900;letter-spacing:.13em;text-transform:uppercase;color:var(--green);margin-bottom:7px}.game-promo h3{font-family:Georgia,"Times New Roman",serif;font-size:1.35rem;letter-spacing:-.03em;margin:0 0 7px}.game-promo p{font-size:.87rem;color:#405e55;margin:0 0 15px}.game-promo__actions{display:flex;flex-wrap:wrap;gap:8px}.game-promo__actions .btn{font-size:.82rem;padding:10px 13px}
.learning-section{background:#eef4ed}.learning-hub{padding-bottom:80px}.learning-cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.learning-card{display:flex;flex-direction:column;min-width:0;padding:27px;background:#fff;border:1px solid var(--line);border-radius:19px;text-decoration:none;color:var(--ink);transition:transform .15s,border-color .15s}.learning-card:hover,.learning-card:focus-visible{transform:translateY(-3px);border-color:var(--green)}.learning-card h3{font-family:Georgia,serif;font-size:1.43rem}.learning-card p{color:var(--muted);margin:0 0 20px;line-height:1.55}.learning-card span{margin-top:auto;color:var(--green);font-weight:800}.learning-more{display:flex;flex-wrap:wrap;gap:14px;margin:28px 0}.compare-scroll{max-width:100%;overflow-x:auto}.compare-table{border-collapse:collapse;width:100%;min-width:420px;background:#fff}.compare-table th,.compare-table td{text-align:left;border-bottom:1px solid var(--line);padding:11px 16px}.compare-table th{background:#eaf2e9;color:var(--ink)}.article-related{background:#eaf2e9;border-radius:16px;padding:7px 23px 18px;margin:40px 0}.article-related h2{font-size:1.55rem}.article-actions{padding-top:12px;border-top:1px solid var(--line)}@media(max-width:850px){.learning-cards{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:600px){.learning-cards{grid-template-columns:1fr}.learning-card{padding:22px}.learning-hub{padding-bottom:55px}}