:root{color-scheme:dark;--paper:#f3ede1;--ink:#202d46;--muted:#c1c5cd}
*{box-sizing:border-box}html{background:var(--ink);color:var(--paper)}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Hiragino Kaku Gothic ProN",sans-serif;-webkit-font-smoothing:antialiased}
a{color:inherit;text-underline-offset:.25em}a:focus-visible{outline:2px solid var(--paper);outline-offset:6px}
.home{min-height:100svh;display:grid;place-items:center;padding:48px 24px}
.identity{text-align:center;max-width:100%;transform:translateY(-24px)}
.mark{display:block;width:100px;height:100px;margin:0 auto 8px}
.wordmark{display:block;width:min(330px,75vw);height:auto}
h1{margin:0}.tagline{font-family:Didot,"Bodoni MT",Georgia,serif;font-size:clamp(23px,5vw,29px);font-weight:400;margin:24px 0 0}
.store{margin-top:68px;font-size:14px;line-height:1.8;color:var(--muted)}.store p{margin:0}
.store a{display:inline-block;padding:12px 22px;border:1px solid #9098a8;border-radius:4px;text-decoration:none;color:var(--paper)}
header{max-width:1120px;margin:auto;padding:28px}
.brand{display:inline-flex;align-items:center;gap:12px;text-decoration:none}
.brand img:first-child{width:40px;height:40px;margin:0}.brand .wordmark{width:128px}
.book{max-width:760px;margin:72px auto 120px;padding:0 28px}
.book h1{font-family:"Hiragino Mincho ProN","Yu Mincho",serif;font-size:clamp(32px,6vw,50px);font-weight:500;line-height:1.5;letter-spacing:.04em;overflow-wrap:anywhere}
.author{color:var(--muted);font-size:16px;margin:20px 0 48px}
.introduction{border-top:1px solid #536077;padding-top:30px;font-family:"Hiragino Mincho ProN","Yu Mincho",serif;font-size:18px;line-height:2.1;overflow-wrap:anywhere}
.introduction p{margin:0 0 1em}.book .store{margin-top:40px}
.book .cover{display:block;width:min(260px,60%);height:auto;margin:0 0 36px;box-shadow:0 10px 30px #00000059}
.doc h2{font-family:"Hiragino Mincho ProN","Yu Mincho",serif;font-size:21px;font-weight:500;line-height:1.7;margin:46px 0 14px}
.doc p{font-size:16px;line-height:2;margin:0 0 1.1em}
.doc .doc-lead{font-family:"Hiragino Mincho ProN","Yu Mincho",serif;font-size:18px;line-height:2.1;border-top:1px solid #536077;padding-top:30px;margin-top:40px}
.doc-list{margin:0}.doc-list dt{margin-top:22px;font-weight:600}.doc-list dd{margin:6px 0 0;line-height:2}
.doc-mail a{font-size:18px;color:#a9c9bc}
.doc-links{margin-top:44px;display:flex;flex-wrap:wrap;gap:24px;font-size:15px}.doc-links a{color:#a9c9bc}
.doc-version{margin-top:48px;padding-top:20px;border-top:1px solid #536077;color:var(--muted);font-size:13px}
@media(max-width:480px){header{padding:20px}.book{margin-top:48px;padding:0 24px}.author{margin-bottom:32px}.introduction{font-size:17px}.doc h2{font-size:20px}}