:root{color-scheme:light;--paper:#faf8f2;--ink:#253e32;--green:#234f3d;--muted:#5c685e;--line:#d9dfd3;--serif:"Yu Mincho","Hiragino Mincho ProN",YuMincho,serif;--sans:"Hiragino Kaku Gothic ProN","Yu Gothic",Meiryo,system-ui,sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:2rem}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:1.125rem;line-height:1.95;overflow-wrap:anywhere}a{color:inherit;text-underline-offset:.25em}a:hover{color:#456c49}a:focus-visible,summary:focus-visible{outline:3px solid #98621e;outline-offset:6px;border-radius:3px}img{display:block;max-width:100%;height:auto}p{margin:0 0 1.1rem}h1,h2,h3{margin:0;line-height:1.65;font-weight:500}h1,h2{font-family:var(--serif)}.wrap{width:min(1144px,calc(100% - 80px));margin-inline:auto}.skip-link{position:absolute;top:-100px;left:1rem;background:white;padding:1rem;z-index:10}.skip-link:focus{top:1rem}.site-header{display:flex;justify-content:space-between;align-items:center;gap:2rem;padding-block:28px;border-bottom:1px solid var(--line)}.brand{display:flex;gap:13px;align-items:center;text-decoration:none;font-family:var(--serif);font-size:1.6rem;line-height:1.4;letter-spacing:.1em;font-weight:600}.brand small{display:block;font-family:var(--sans);font-size:.65rem;font-weight:400;letter-spacing:.12em;margin-top:6px}.brand-mark{display:grid;place-items:center;width:45px;height:49px;border:1px solid var(--green);border-radius:48% 48% 38% 38%;font-size:1.5rem}.site-header nav{display:flex;gap:30px;font-size:.95rem}.site-header nav a{min-height:44px;display:flex;align-items:center;text-decoration:none}.hero{display:grid;grid-template-columns:1fr 1fr;gap:2rem;align-items:center;padding-block:85px 75px;position:relative}.eyebrow{font-size:.83rem;font-weight:600;letter-spacing:.12em;display:flex;align-items:center;gap:10px;margin-bottom:23px}.status-dot{width:7px;height:7px;background:#52755a;border-radius:50%}h1{font-size:clamp(2.5rem,4.65vw,4.1rem);letter-spacing:.06em;line-height:1.55}.hero-description{margin:27px 0 28px;color:var(--muted);font-size:1.05rem;line-height:2.1}.button{display:inline-flex;align-items:center;justify-content:space-between;gap:38px;padding:17px 25px;background:var(--green);color:#fff;border-radius:4px;text-decoration:none;min-height:60px;font-size:1rem}.button:hover{background:#35634b;color:#fff}.button span{font-size:1.3rem}.release-note{font-size:.77rem;line-height:1.9;color:var(--muted);margin-top:18px}.hero-art{position:relative;min-width:0;aspect-ratio:1;max-height:510px}.art-circle{position:absolute;inset:0 1% 2%;border-radius:50%;background:#e7eadc}.art-board{position:absolute;top:11%;left:12%;width:69%;transform:rotate(-10deg);filter:drop-shadow(8px 14px 10px #36472b25)}.board{width:100%;border-radius:5px}.piece{position:absolute;width:18%}.piece-king{left:40%;top:64%}.piece-pawn{left:29%;top:40%}.piece-gold{left:61%;top:65%}.art-tiles{position:absolute;display:flex;gap:3px;right:-1%;top:57%;width:45%;transform:rotate(9deg);filter:drop-shadow(5px 9px 6px #253e3222)}.art-tiles img{width:31.5%}.art-stones{position:absolute;top:12%;right:0;width:28%;display:flex;align-items:center;filter:drop-shadow(5px 8px 5px #253e3222)}.art-stones img{width:60%}.art-stones img+img{margin-top:60%;margin-left:-15%}.art-caption{position:absolute;bottom:0;left:0;right:0;text-align:center;font-family:var(--serif);font-size:.85rem;letter-spacing:.15em;color:#587059}.promise-band{border-block:1px solid var(--line);background:#f2f3eb}.promises{display:flex;justify-content:space-between;gap:20px;padding-block:22px}.promises p{display:flex;align-items:center;gap:13px;margin:0;font-size:.88rem}.promises span{font-family:var(--serif);font-size:.8rem;color:#617854}.section{padding-block:95px}.section-heading{display:flex;justify-content:space-between;align-items:flex-end;gap:2rem;margin-bottom:40px}h2{font-size:clamp(1.75rem,3vw,2.5rem);letter-spacing:.035em}.section-heading .eyebrow{margin-bottom:15px}.section-heading>p{font-size:.92rem;color:var(--muted);margin-bottom:6px}.app-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}.app-card{border:1px solid #dee0d6;border-radius:7px;padding:32px 34px 22px;background:#fffefa;display:flex;flex-direction:column;align-items:flex-start;position:relative;overflow:hidden}.app-card-top{display:flex;justify-content:space-between;align-items:flex-start;width:100%;margin-bottom:9px}.app-number{font-size:.71rem;letter-spacing:.15em;font-weight:600;padding-top:5px;color:var(--muted)}.app-card-top img{width:82px;aspect-ratio:1;border-radius:19px}.app-card h3{font-family:var(--serif);font-size:1.95rem;letter-spacing:.04em;margin-top:-18px}.app-lead{font-size:1rem;font-weight:600;margin-top:8px;margin-bottom:14px}.app-card>p:not(.app-lead){color:var(--muted);font-size:.98rem;line-height:1.95}.features{list-style:none;padding:0;margin:8px 0 23px;display:flex;flex-wrap:wrap;gap:8px;font-size:.73rem}.features li{background:#eff2e9;border-radius:3px;padding:4px 10px}.mahjong{background:#f4f5ed}.mahjong .features li{background:#e8edde}.go{background:#f1f2ef}.memory{background:#fbf3e6}.memory .features li{background:#f2e7d3}.text-link{display:flex;justify-content:space-between;width:100%;margin-top:auto;padding-block:15px 6px;border-top:1px solid var(--line);font-size:.93rem;text-decoration:none;font-weight:600;min-height:52px}.section-note{font-size:.8rem;color:var(--muted);margin-top:22px;line-height:1.9}.design-section{background:#254f3e;color:#fffdf2;padding-block:76px}.design-grid{display:grid;grid-template-columns:1fr 1fr;gap:60px}.design-section .eyebrow{color:#d4dec9}.design-section h2{font-size:clamp(2rem,4vw,3.2rem);line-height:1.7}.design-copy{padding-top:8px}.large-copy{font-family:var(--serif);font-size:1.55rem;line-height:1.9;margin-bottom:24px}.design-copy>p:not(.large-copy){font-size:.95rem;color:#e1e8db;line-height:2}.guide-intro{font-size:1rem;color:var(--muted);max-width:850px;margin-bottom:32px}.guide-list{border-top:1px solid var(--line)}details{border-bottom:1px solid var(--line);scroll-margin-top:2rem}summary{list-style:none;cursor:pointer;position:relative;display:flex;gap:24px;align-items:center;padding:26px 8px;font-weight:500;min-height:68px}summary::-webkit-details-marker{display:none}summary:hover{color:#3b6747}.guide-number{font-family:var(--serif);font-size:1rem;color:#6b7c63;align-self:flex-start;padding-top:6px}summary small{display:block;font-size:.82rem;color:var(--muted);font-weight:400;line-height:1.8;margin-top:4px}.plus{width:16px;height:16px;position:relative;flex-shrink:0;margin-left:auto}.plus:before,.plus:after{content:"";background:currentColor;position:absolute;left:0;top:7px;width:16px;height:1px}.plus:after{transform:rotate(90deg)}details[open] .plus:after{transform:rotate(0)}.guide-body{margin-left:50px;padding:0 30px 30px 0;max-width:900px;font-size:1rem}.guide-body ol{margin:0 0 24px;padding-left:1.5rem}.guide-body li{padding-left:7px;margin-bottom:17px}.guide-body strong{font-weight:600}.guide-note{border-left:3px solid #93a388;background:#edf0e6;padding:13px 18px;font-size:.88rem;margin-bottom:0}.faq-section{background:#f0f1e9;padding-block:75px}.faq-grid{display:grid;grid-template-columns:1fr 1.7fr;gap:70px}.faq-grid>div>p:not(.eyebrow){font-size:.94rem;color:var(--muted);margin-top:20px}.faq-list{border-top:1px solid var(--line)}.faq-list summary{font-size:1rem;gap:22px;padding:23px 2px}.faq-body{font-size:.95rem;color:var(--muted);padding:0 22px 15px 2px}.data-section{padding-block:68px;max-width:900px}.data-section h2{font-family:var(--sans);font-size:1.2rem;font-weight:500;letter-spacing:0;margin-bottom:18px}.data-section>p{font-size:.9rem;color:var(--muted)}.data-section .section-note{font-size:.76rem}.site-footer{border-top:1px solid var(--line);padding-block:36px}.footer-inner{display:flex;flex-wrap:wrap;justify-content:space-between;gap:25px;align-items:center}.footer-brand{display:block;font-size:1.4rem}.footer-inner>div{display:flex;gap:25px;flex-wrap:wrap;align-items:center}.footer-inner>div a{font-size:.78rem;display:inline-flex;align-items:center;min-height:44px}.footer-inner>small{width:100%;font-size:.68rem;letter-spacing:.08em;color:var(--muted)}
.art-board::after{content:"";position:absolute;inset:4%;background-image:linear-gradient(to right,#83613299 1px,transparent 1px),linear-gradient(to bottom,#83613299 1px,transparent 1px);background-size:11.111111% 11.111111%;border-right:1px solid #83613299;border-bottom:1px solid #83613299;z-index:1;pointer-events:none}.piece{z-index:2}html{scroll-behavior:auto}
@media(min-width:1600px){.hero-art{width:510px}.hero{gap:70px}}
@media(max-width:900px){.wrap{width:calc(100% - 48px)}.site-header nav{gap:18px;font-size:.83rem}.hero{padding-block:55px;gap:10px}.hero-art{align-self:start;margin-top:75px}.promises{gap:12px}.promises p{font-size:.75rem;gap:8px}.section{padding-block:65px}.app-card{padding:25px 23px 18px}.app-card-top img{width:64px;border-radius:15px}.app-card h3{font-size:1.6rem;margin-top:0}.design-grid{gap:32px}.faq-grid{gap:35px;grid-template-columns:1fr 1.6fr}.section-heading>p{font-size:.83rem}}
@media(max-width:620px){body{font-size:1.05rem}.wrap{width:calc(100% - 40px)}.site-header{flex-direction:column;align-items:flex-start;gap:18px;padding-block:21px 10px}.brand{font-size:1.45rem}.brand small{font-size:.61rem}.brand-mark{width:39px;height:43px}.site-header nav{width:100%;justify-content:space-between;gap:10px;font-size:.8rem}.hero{grid-template-columns:1fr;gap:15px;padding-block:39px 30px}.hero h1{font-size:clamp(2.2rem,8.3vw,3.5rem)}.eyebrow{font-size:.73rem;margin-bottom:18px}.hero-description{font-size:1rem;margin-top:22px}.release-note{font-size:.72rem}.hero-art{width:min(100%,370px);margin:5px auto 0;align-self:auto}.button{font-size:1rem;width:100%;max-width:340px;gap:20px}.promises{flex-direction:column;gap:10px;padding-block:20px}.promises p{font-size:.88rem}.promises span{min-width:24px}.section{padding-block:53px}.section-heading{display:block;margin-bottom:26px}.section-heading>p{margin-top:15px;font-size:.9rem}.section-heading>p br{display:none}h2{font-size:1.8rem}.app-grid{grid-template-columns:1fr;gap:18px}.app-card{padding:25px 23px 18px}.app-card h3{font-size:1.85rem;margin-top:-9px}.app-card-top img{width:72px;border-radius:17px}.app-number{font-size:.7rem}.app-card>p:not(.app-lead){font-size:1rem}.app-lead{font-size:.97rem}.features{font-size:.75rem}.section-note{font-size:.78rem}.design-section{padding-block:47px}.design-grid{grid-template-columns:1fr;gap:25px}.design-section h2{font-size:2.4rem}.design-copy{padding-top:0}.large-copy{font-size:1.4rem}.design-copy>p:not(.large-copy){font-size:.96rem}.guide-intro{font-size:.96rem}.guide-list summary{gap:15px;padding-block:22px}.guide-number{font-size:.88rem}.guide-list summary small{font-size:.76rem}.guide-body{margin-left:0;padding:0 2px 24px;font-size:.96rem}.guide-body ol{padding-left:1.4rem}.guide-note{font-size:.86rem}.faq-section{padding-block:48px}.faq-grid{grid-template-columns:1fr;gap:20px}.faq-grid>div>p:not(.eyebrow) br{display:none}.faq-list summary{font-size:.98rem}.faq-body{font-size:.94rem}.data-section{padding-block:45px}.data-section h2{font-size:1.13rem}.footer-inner>div{gap:12px 20px}.footer-inner>small{font-size:.65rem}.site-footer{padding-block:27px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

/* Privacy and support use the existing site palette and typography. */
.document-page{max-width:900px;padding-block:56px 64px}.document-heading{padding-bottom:28px;border-bottom:1px solid var(--line)}.document-heading .eyebrow{margin-bottom:12px}.document-heading h1{font-size:clamp(2rem,4.65vw,3.2rem);text-wrap:balance}.document-heading p:last-child{margin-top:20px;margin-bottom:0;color:var(--muted)}.document-section{margin-top:36px}.document-section h2{font-size:1.5rem;margin-bottom:16px}.document-section p{margin-bottom:16px}.contact-card{padding:24px;border:1px solid var(--line);border-radius:7px;background:#f0f1e9}.contact-card h2{font-family:var(--sans);font-size:1.25rem}.contact-card .button{margin-top:8px}.footer-contact{width:100%;margin:0;color:var(--muted);font-size:.8rem}.footer-contact a{display:inline-block;min-height:44px;padding-block:8px}.document-page .section-note{margin-top:16px}
@media(max-width:620px){.document-page{padding-block:36px 45px}.document-heading h1{font-size:2rem}.document-section{margin-top:28px}.document-section h2{font-size:1.35rem}.contact-card{padding:20px}.contact-card .button{gap:15px;max-width:100%}}