:root{color-scheme:light;--paper:#f7f1e7;--ink:#261f19;--muted:#74685e;--line:rgba(38,31,25,.18);--panel:rgba(255,252,246,.82);--panel-solid:#fffaf1;--leaf:#44624a;--rose:#a85f5a;--sky:#4c7891;--shadow:0 24px 80px rgba(52,38,24,.22);font-family:ui-serif,Georgia,"Times New Roman",serif}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-size:18px;line-height:1.5}button{font:inherit}.page{min-height:100vh;background:linear-gradient(90deg,rgba(255,255,255,.52),rgba(255,255,255,0) 38%),linear-gradient(180deg,rgba(255,252,246,.68),rgba(247,241,231,1) 74%)}.shell{width:min(1180px,calc(100% - 40px));margin:0 auto}.hero{display:grid;grid-template-columns:minmax(270px,410px) minmax(0,1fr);gap:clamp(32px,5vw,72px);align-items:start;padding:42px 0 58px}.cover-wrap{position:relative;max-width:410px}.cover{display:block;width:100%;height:auto;border-radius:4px;box-shadow:var(--shadow)}.intro{display:flex;flex-direction:column;gap:24px;max-width:710px}h1{margin:0;font-size:clamp(3rem,5.2vw,5.2rem);line-height:.9;letter-spacing:0;font-weight:700;white-space:nowrap}.lead{margin:18px 0 0;max-width:690px;color:#453b32;font-size:clamp(1.06rem,1.65vw,1.3rem)}.lead p{margin:0 0 0.85em}.lead p:last-child{margin-bottom:0}.lead p:first-child{font-weight:700}.flow{display:grid;gap:14px}.step{padding:18px;background:var(--panel);border:1px solid var(--line);border-radius:8px;backdrop-filter:blur(12px)}.step[hidden]{display:none}.step-head{display:flex;align-items:baseline;justify-content:space-between;gap:18px;margin-bottom:14px;font-family:ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}.step-title{margin:0;color:#312920;font-size:.94rem;font-weight:800}.step-note{margin:0;color:var(--muted);font-size:.82rem;text-align:right}.button-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px}.choice{display:block;min-height:54px;padding:11px 13px;border:1px solid var(--line);border-radius:8px;background:rgba(255,255,255,.48);color:var(--ink);cursor:pointer;text-align:left;text-decoration:none;transition:border-color .18s ease,background .18s ease,transform .18s ease}.choice:hover{transform:translateY(-1px);border-color:rgba(38,31,25,.36)}.choice[aria-current="page"]{background:#fffaf1;border-color:rgba(68,98,74,.65);box-shadow:inset 0 0 0 1px rgba(68,98,74,.18)}.choice strong,.choice span{display:block;font-family:ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.choice strong{font-size:.96rem;line-height:1.2}.choice span{margin-top:3px;color:var(--muted);font-size:.78rem;line-height:1.25}.volume-grid{display:grid;grid-template-columns:1fr;gap:14px;margin-top:22px}.volume-card{display:flex;align-items:flex-start;gap:18px;min-width:0;color:inherit;text-decoration:none;border:0;background:rgba(255,255,255,.42);cursor:pointer;padding:12px;text-align:left;border-radius:8px;border:1px solid var(--line);width:100%;max-width:none}.volume-card[aria-current="page"]{border-color:rgba(68,98,74,.72);box-shadow:inset 0 0 0 1px rgba(68,98,74,.16)}.volume-cover{position:relative;flex:0 0 118px;overflow:hidden;border:1px solid rgba(38,31,25,.16);border-radius:6px;background:var(--panel-solid);box-shadow:0 12px 34px rgba(52,38,24,.14);aspect-ratio:820 / 1118}.volume-cover img{display:block;width:100%;height:auto}.volume-title{font-family:ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;font-size:1.08rem;font-weight:800;line-height:1.25}.volume-copy{display:flex;flex-direction:column;gap:8px;padding-top:2px;min-width:0}.volume-meta{color:var(--muted);font-family:ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;font-size:.95rem;line-height:1.25}.detail-panel{display:grid;grid-template-columns:minmax(150px,220px) minmax(0,1fr);gap:clamp(22px,3vw,34px);align-items:start;background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:clamp(16px,2.2vw,24px)}.detail-cover{width:100%;height:auto;border-radius:6px;border:1px solid rgba(38,31,25,.16);box-shadow:0 16px 42px rgba(52,38,24,.18)}.detail-info{display:flex;flex-direction:column;gap:14px;min-width:0}.detail-title{display:flex;flex-direction:column;gap:5px;margin:0;font-family:ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.25}.detail-heading{font-size:1.1rem;font-weight:800}.detail-meta{color:var(--muted);font-size:.95rem;font-weight:500}.detail-actions{display:flex;flex-wrap:wrap;gap:10px}.action-button{display:inline-flex;align-items:center;justify-content:center;min-height:42px;padding:0 14px;border:1px solid rgba(68,98,74,.55);border-radius:8px;background:var(--leaf);color:white;font-family:ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;font-size:.86rem;font-weight:800;text-decoration:none;cursor:pointer}.action-button.secondary{background:rgba(255,255,255,.52);color:var(--leaf)}.action-button[disabled]{cursor:default;opacity:.62}.section{padding:70px 0;border-top:1px solid var(--line)}.section[hidden]{display:none}.section-grid{display:grid;grid-template-columns:1fr;gap:22px;align-items:start}.section-intro{max-width:760px}.sample-section{display:grid;gap:14px}.sample-heading{margin:0;font-family:ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;font-size:1.05rem;font-weight:800;line-height:1.25}.book-list-section{max-width:none}.choice-section{max-width:none}.choice-section .step{margin-top:22px}h2{margin:0;font-size:clamp(2rem,3.8vw,3.7rem);line-height:1;letter-spacing:0}.section-text{margin:16px 0 0;color:var(--muted);max-width:none}.sample{background:var(--panel-solid);border:1px solid var(--line);border-radius:8px;overflow:hidden;margin-top:4px}.sample-cta{display:flex;align-items:center;justify-content:flex-start;gap:18px;padding:16px 18px;border:1px solid var(--line);border-radius:8px;background:rgba(255,250,241,.72)}.sample-cta:empty{display:none}.sample-cta p{margin:0;color:#453b32;font-size:1rem;line-height:1.45}.sample-cta .action-button{flex:0 0 auto;white-space:nowrap}.sample-row{display:grid;grid-template-columns:1fr 1fr;min-height:74px;border-bottom:1px solid var(--line)}.sample-row:last-child{border-bottom:0}.sample-cell{display:block;padding:16px 18px;min-width:0;font-size:1rem;line-height:1.75}.sample-cell:first-child{font-size:1.12rem;line-height:2.35}.sample-cell+.sample-cell{border-left:1px solid var(--line);color:#3f5444}.furigana-help{display:inline;color:#a49c95;font-size:1em;margin-left:.06em;margin-right:.14em;vertical-align:baseline;white-space:nowrap}.kana-romaji{ruby-position:over;ruby-align:center;text-align:center}.kana-romaji rb{text-align:center}.kana-romaji rt{color:#8a827a;font-size:.58em;font-weight:400;line-height:1;text-align:center}.furigana-help .kana-romaji rt{color:#a49c95;font-size:.62em}footer{padding:30px 0 42px;color:var(--muted);font-family:ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;font-size:.82rem;border-top:1px solid var(--line)}@media (max-width:860px){.hero,.section-grid{grid-template-columns:1fr}.hero{min-height:0;padding-top:10px}.cover-wrap{width:min(310px,82vw);margin:0 auto}}@media (max-width:620px){.shell{width:min(100% - 24px,1180px)}.step-head{align-items:flex-start;flex-direction:column;gap:5px}.step-note{text-align:left}.button-grid{grid-template-columns:1fr}h1{white-space:normal}.sample-row{grid-template-columns:1fr}.sample-cell+.sample-cell{border-left:0;border-top:1px solid var(--line)}.sample-cta{align-items:flex-start;flex-direction:column}.detail-panel{grid-template-columns:1fr}.detail-cover{width:min(230px,100%)}}