*{box-sizing:border-box} :root{--bg:#f7f4ee;--paper:#fffdf8;--ink:#24211d;--muted:#777066;--line:#ded8ce}
body{margin:0;background:var(--bg);color:var(--ink);font-family:"Yu Mincho","Hiragino Mincho ProN",serif;transition:.25s}
header{height:68px;display:flex;align-items:center;justify-content:space-between;max-width:1080px;margin:auto;padding:0 24px;border-bottom:1px solid var(--line)}
.brand{font-weight:700;letter-spacing:.16em}button{font:inherit;color:inherit}header button,.tools button,#back{border:0;background:none;cursor:pointer}
main{max-width:1080px;margin:auto;padding:0 24px 80px}.hero{padding:92px 0 78px;max-width:720px}.eyebrow,.label{font-family:Arial,sans-serif;font-size:11px;letter-spacing:.22em;color:#9b6e43}.hero h1{font-size:clamp(38px,7vw,70px);line-height:1.35;margin:15px 0 25px;font-weight:500}.hero>p:last-child{color:var(--muted);line-height:2}
.section-title{display:flex;justify-content:space-between;align-items:end;border-bottom:1px solid var(--line);margin-bottom:26px}.section-title h2{font-size:24px;font-weight:500}.section-title span{font:11px Arial;color:var(--muted);padding-bottom:20px}
.grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.book-card{border:0;background:var(--paper);padding:18px;text-align:left;display:grid;grid-template-columns:105px 1fr;gap:20px;cursor:pointer;border-radius:4px;box-shadow:0 3px 15px #5b4c3920}.cover{height:145px;display:flex;align-items:center;justify-content:center;padding:12px;background:#b7a48c;color:#fff;writing-mode:vertical-rl;letter-spacing:.12em}.c1{background:#62605a}.c2{background:#4c6770}.c3{background:#80685f}.c4{background:#7c795d}.book-card h3{margin:8px 0 4px;font-size:19px}.book-card p{margin:0 0 12px;color:var(--muted);font-size:13px}.book-card small{line-height:1.7;color:var(--muted)}
.reader{display:none;min-height:100vh}.reader.open{display:block}.reader-head{height:64px;position:sticky;top:0;background:color-mix(in srgb,var(--bg) 92%,transparent);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;padding:0 22px;z-index:2}.tools{display:flex;gap:12px}article{max-width:680px;margin:auto;padding:72px 25px 120px}article h1{font-size:38px;font-weight:500;margin:14px 0}.author{color:var(--muted)}.rule{width:38px;border-top:1px solid #9b6e43;margin:36px 0}#rtext{font-size:18px;line-height:2.25;letter-spacing:.04em}#rtext p{margin:0 0 1.5em}.source-note{margin-top:70px;padding-top:20px;border-top:1px solid var(--line);font-size:12px;line-height:1.8;color:var(--muted)}
.dark{--bg:#1c1b19;--paper:#25231f;--ink:#eee9df;--muted:#aaa297;--line:#3b3833}
@media(max-width:650px){header{height:58px}.hero{padding:64px 0 54px}.grid{grid-template-columns:1fr}.book-card{grid-template-columns:90px 1fr}.cover{height:128px}.book-card small{font-size:12px}article{padding-top:52px}article h1{font-size:32px}}