@font-face{font-family:GallerySerif;src:url('/assets/SourceSerif4-Regular.ttf') format('truetype');font-display:swap}
:root{color-scheme:dark;--bg:#10141a;--surface:#19212b;--ink:#f6f2e8;--muted:#bec5cc;--accent:#9acdc6;--line:#36424e;font-family:Arial,'Hiragino Kaku Gothic ProN','Yu Gothic',sans-serif;font-size:16px;background:var(--bg);color:var(--ink)}
*{box-sizing:border-box}body{margin:0}a{color:inherit;text-underline-offset:.25em}a:hover{color:var(--accent)}a:focus-visible,summary:focus-visible{outline:3px solid var(--accent);outline-offset:6px}p{line-height:1.9;color:var(--muted)}h1,h2,h3{font-weight:400;line-height:1.4;text-wrap:balance}h1{font-family:GallerySerif,'Yu Mincho',serif;font-size:clamp(2.6rem,6.5vw,5.8rem);letter-spacing:-.035em;margin:1.5rem 0}h2{font-size:1.65rem}h3{font-size:1.25rem}.wrap{max-width:1160px;margin:auto;padding:0 32px}.skip{position:absolute;left:20px;top:-100px;background:var(--ink);color:var(--bg);padding:16px;z-index:5}.skip:focus{top:12px}header{border-bottom:1px solid var(--line)}.header{min-height:100px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:flex;gap:14px;align-items:center;text-decoration:none;font-family:GallerySerif,serif;font-size:1.2rem}.brand img{border-radius:12px}nav{display:flex;gap:28px;align-items:center;font-size:.9rem}nav a[aria-current]{color:var(--accent)}.hero{display:grid;grid-template-columns:1.3fr 1fr;gap:60px;align-items:center;padding:90px 0 100px}.eyebrow{font-size:.8rem;letter-spacing:.19em;color:var(--accent)}.intro{max-width:540px;font-size:1.1rem}.button{display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--accent);border-radius:4px;background:var(--accent);color:var(--bg);padding:15px 23px;text-decoration:none;line-height:1.5}.button:hover{background:var(--ink);color:var(--bg)}.availability{font-size:.875rem;margin-top:25px}.visual{margin:0;display:flex;align-items:center;flex-direction:column;gap:24px}.app-icon{width:min(100%,300px);height:auto;border-radius:23%;box-shadow:0 25px 90px #0006}.gameplay{width:min(100%,340px);height:auto;border-radius:22px}figcaption{font-size:.875rem;color:var(--muted)}.features{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line);gap:40px;padding:45px 0 60px}.features h2{font-size:1.5rem}.details{border-top:1px solid var(--line);padding:35px 0 75px;max-width:770px}.details a{color:var(--accent)}footer{border-top:1px solid var(--line);padding:35px 0 45px}.footer-links{display:flex;gap:24px;flex-wrap:wrap;font-size:.875rem}.credit{font-size:.875rem;margin-top:28px}.document{max-width:780px;margin:0 auto;padding:65px 0 90px}.document h1{font-size:clamp(2.3rem,5vw,3.5rem)}.document section{margin-top:40px;scroll-margin-top:24px}.document section h2{padding-top:15px;border-top:1px solid var(--line)}.document a{overflow-wrap:anywhere}.lead{font-size:1.1rem}.notice{border-left:3px solid var(--accent);background:var(--surface);padding:16px 20px;font-size:.875rem}.toc{display:flex;flex-wrap:wrap;gap:12px 24px;padding:20px 0}details{border-bottom:1px solid var(--line);padding:20px 0}summary{cursor:pointer;line-height:1.7;padding-right:10px;font-size:1.05rem}details p{padding-left:20px}.contact{padding:24px;background:var(--surface);border-radius:6px}.language-choice{display:flex;gap:24px;margin-top:36px}
@media(max-width:740px){.wrap{padding:0 22px}.header{min-height:90px;flex-wrap:wrap;padding-top:18px;padding-bottom:18px;gap:16px}nav{gap:20px}.hero{grid-template-columns:1fr;padding:45px 0 55px;gap:35px}h1{font-size:clamp(2.5rem,10vw,4rem)}.visual{padding:15px 0}.app-icon{max-width:210px}.features{grid-template-columns:1fr;gap:15px}.document{padding-top:30px}.footer-links{gap:18px}.brand{font-size:1.05rem}}
@media(prefers-reduced-motion:no-preference){a{transition:color .15s,background .15s}}
@media print{:root{color-scheme:light;background:white;color:black}p{color:black}header,footer,.notice,.toc{display:none}.document{max-width:none;padding:0}details{display:block}details::details-content{content-visibility:visible}a{color:black}}
/* Keep Japanese legal titles readable on narrow screens, including prolonged marks. */
.document:lang(ja) h1{font-size:clamp(1.9rem,7.8vw,3.5rem);line-break:strict;word-break:normal;overflow-wrap:normal}