:root{--bg:#f7f7f8;--card:#fff;--text:#171717;--muted:#666;--line:#e8e8ea;--accent:#111827;--radius:18px}
*{box-sizing:border-box}
body{margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;background:var(--bg);color:var(--text)}
a{color:inherit}
.wrap{max-width:1240px;margin:auto;padding:34px 22px 70px}
.hero{padding:34px 0 24px}
.hero h1{font-size:clamp(34px,5vw,64px);margin:0 0 10px;letter-spacing:-.04em}
.hero p{color:var(--muted);font-size:18px;max-width:760px;line-height:1.65}
.toolbar{display:flex;gap:12px;flex-wrap:wrap;margin:24px 0}
input,select{border:1px solid var(--line);background:#fff;border-radius:12px;padding:13px 14px;font-size:15px}
input{flex:1;min-width:260px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:20px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:0 8px 24px rgba(0,0,0,.04);display:flex;flex-direction:column}
.cover{aspect-ratio:2/3;background:#ececef;display:block;width:100%;object-fit:cover}
.card-body{padding:16px;display:flex;flex-direction:column;gap:9px;flex:1}
.card h2{font-size:17px;line-height:1.3;margin:0}.card h2 a{text-decoration:none}.card h2 a:hover{text-decoration:underline}
.meta{font-size:13px;color:var(--muted)}
.btn{display:inline-block;text-decoration:none;background:var(--accent);color:#fff;padding:10px 12px;border-radius:10px;font-weight:650;text-align:center;margin-top:auto}
.count{color:var(--muted);margin:8px 0 18px}
.book-page{max-width:1040px;margin:auto;padding:42px 22px 80px}
.book-top{display:grid;grid-template-columns:minmax(220px,320px) 1fr;gap:34px;align-items:start}
.book-top img{width:100%;border-radius:16px;border:1px solid var(--line);background:#eee}
.book-top h1{font-size:clamp(32px,5vw,56px);letter-spacing:-.04em;margin:0 0 10px}
.subtitle{font-size:19px;color:var(--muted);line-height:1.5}
.actions{display:flex;gap:10px;flex-wrap:wrap;margin:22px 0}
.action{padding:12px 16px;border-radius:11px;text-decoration:none;border:1px solid var(--line);background:#fff;font-weight:700;cursor:pointer}
.action.primary{background:#111827;color:#fff;border-color:#111827}
.section{margin-top:36px;padding-top:26px;border-top:1px solid var(--line)}
.section h2{font-size:24px;margin:0 0 12px}
.section p,.section li{font-size:17px;line-height:1.75}
.pending{background:#fff8dc;border:1px solid #f0df9b;padding:14px 16px;border-radius:12px;color:#66551c}
.small{font-size:13px;color:var(--muted)}
.breadcrumbs{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin:0 0 22px;color:var(--muted);font-size:14px}.breadcrumbs a{text-decoration:none}.breadcrumbs a:hover{text-decoration:underline}
.book-tabs{display:flex;gap:10px;flex-wrap:wrap;margin:-8px 0 24px}
.book-tab{display:inline-flex;align-items:center;gap:8px;padding:9px 14px;border:1px solid #cbd5e1;border-radius:999px;background:#fff;text-decoration:none;font-size:14px;font-weight:750;box-shadow:0 4px 12px rgba(15,23,42,.05)}
.book-tab:hover{background:#f8fafc;border-color:#94a3b8;transform:translateY(-1px)}
.author-tab:before{content:"✦";font-size:12px;color:#2563eb}
.google-books-preview{max-width:760px;margin:38px auto 8px;padding:28px 24px;border:1px solid #c7d2fe;border-radius:20px;background:linear-gradient(135deg,#eef2ff 0%,#f8fafc 48%,#fff7ed 100%);box-shadow:0 14px 34px rgba(17,24,39,.08);text-align:center}
.google-books-preview .preview-icon{width:58px;height:58px;margin:0 auto 12px;display:flex;align-items:center;justify-content:center;border-radius:16px;background:#fff;color:#1d4ed8;box-shadow:0 8px 20px rgba(29,78,216,.13);border:1px solid rgba(29,78,216,.14)}
.google-books-preview .preview-icon svg{width:42px;height:42px;display:block}
.google-books-preview .preview-title{margin:0 0 6px;font-size:22px;font-weight:800;line-height:1.25;color:#111827}
.google-books-preview .preview-note{margin:0 auto;max-width:620px;color:#374151}
.google-books-preview .actions{justify-content:center;margin:18px 0 0}
.google-books-preview .action{background:#111827;color:#fff;border-color:#111827;padding:13px 20px;box-shadow:0 8px 20px rgba(17,24,39,.12)}
.google-books-preview .action:hover{transform:translateY(-1px);box-shadow:0 10px 24px rgba(17,24,39,.18)}
.author-page{max-width:1000px}
.author-hero{display:grid;grid-template-columns:220px 1fr;gap:32px;align-items:center;padding:28px;border:1px solid #dbe4f0;border-radius:26px;background:linear-gradient(135deg,#ffffff 0%,#f3f7ff 55%,#fff8ef 100%);box-shadow:0 16px 40px rgba(15,23,42,.08)}
.author-photo{width:220px;height:220px;object-fit:cover;border-radius:24px;border:5px solid #fff;box-shadow:0 12px 30px rgba(15,23,42,.18);background:#e5e7eb}
.author-kicker{margin:0 0 8px;text-transform:uppercase;letter-spacing:.12em;font-size:12px;font-weight:800;color:#2563eb}
.author-hero h1{margin:0;font-size:clamp(38px,6vw,66px);line-height:1;letter-spacing:-.05em}
.author-hero .subtitle{max-width:680px;margin-bottom:0}
.author-language-tabs{display:flex;gap:8px;flex-wrap:wrap;margin:0 0 22px}
.author-lang-tab{appearance:none;border:1px solid #cbd5e1;background:#fff;padding:10px 15px;border-radius:999px;font:inherit;font-weight:750;cursor:pointer}
.author-lang-tab:hover,.author-lang-tab.active{background:#111827;color:#fff;border-color:#111827}
.author-bio-panel{padding:24px;border:1px solid var(--line);border-radius:18px;background:#fff;box-shadow:0 8px 24px rgba(15,23,42,.04)}
.author-bio-panel h2{margin-top:0}
.author-bio-panel p{margin-bottom:0}
.author-translate-box{display:grid;grid-template-columns:auto 1fr;gap:16px 18px;align-items:center;padding:24px;border:1px solid #bfdbfe;border-radius:20px;background:#eff6ff}
.author-translate-box h2,.author-translate-box p{margin:0}
.translate-mark{width:54px;height:54px;border-radius:16px;background:#fff;color:#1d4ed8;border:1px solid #bfdbfe;display:flex;align-items:center;justify-content:center;font-weight:900;box-shadow:0 7px 18px rgba(29,78,216,.1)}
.author-translate-controls{grid-column:1/-1;display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.author-translate-controls label{font-weight:750}
.author-translate-controls select{min-width:230px}
.profile-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.profile-link{display:flex;flex-direction:column;gap:5px;padding:18px;border:1px solid var(--line);border-radius:16px;background:#fff;text-decoration:none;box-shadow:0 6px 18px rgba(15,23,42,.035)}
.profile-link:hover{border-color:#cbd5e1;transform:translateY(-1px);box-shadow:0 9px 22px rgba(15,23,42,.07)}
.profile-link strong{font-size:16px}.profile-link span{font-size:13px;color:var(--muted);overflow-wrap:anywhere}
.topic-index-cta{display:grid;grid-template-columns:72px 1fr;gap:20px;align-items:center;margin-top:42px;padding:24px;border:1px solid #dbeafe;border-radius:20px;background:linear-gradient(135deg,#eff6ff 0%,#fff 55%,#f0fdf4 100%);box-shadow:0 12px 30px rgba(17,24,39,.06)}
.topic-index-cta h2{margin:0 0 6px;font-size:24px}.topic-index-cta p{margin:0;color:#4b5563}.topic-index-cta .actions{margin:14px 0 0}
.topic-index-icon{width:64px;height:64px;display:flex;align-items:center;justify-content:center;border-radius:18px;background:#fff;color:#1d4ed8;border:1px solid #bfdbfe;box-shadow:0 8px 18px rgba(29,78,216,.1)}
.topic-index-icon svg{width:44px;height:44px;display:block}
.topics-page{max-width:1180px}
.topics-hero{padding:14px 0 24px}.topics-hero h1{font-size:clamp(38px,6vw,68px);letter-spacing:-.045em;margin:4px 0 12px}.topics-hero>p{max-width:780px;font-size:19px;line-height:1.65;color:#4b5563}
.topic-search-panel{margin:12px 0 20px;padding:18px;border:1px solid var(--line);border-radius:16px;background:#fff}.topic-search-panel label{display:block;font-weight:750;margin:0 0 9px}.topic-search-panel input{width:100%;min-width:0}
.topic-jump-grid{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0 38px}.topic-chip{display:inline-flex;gap:8px;align-items:center;padding:10px 13px;border:1px solid #dbeafe;border-radius:999px;background:#eff6ff;text-decoration:none;font-weight:700}.topic-chip span{display:inline-flex;align-items:center;justify-content:center;min-width:26px;height:26px;padding:0 7px;border-radius:999px;background:#fff;color:#475569;font-size:12px}
.topic-group{scroll-margin-top:24px;margin:42px 0}.topic-group-header{display:flex;align-items:end;justify-content:space-between;gap:16px;border-bottom:1px solid var(--line);padding-bottom:12px;margin-bottom:18px}.topic-group-header h2{font-size:clamp(26px,4vw,36px);margin:0;letter-spacing:-.025em}.topic-count{color:var(--muted);font-size:14px;white-space:nowrap}
.topic-books-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:16px}.topic-book-card{display:grid;grid-template-columns:92px 1fr;gap:14px;align-items:start;padding:13px;border:1px solid var(--line);border-radius:16px;background:#fff;box-shadow:0 6px 18px rgba(0,0,0,.035)}.topic-cover-link{display:block}.topic-book-cover{width:92px;aspect-ratio:2/3;object-fit:cover;border-radius:9px;border:1px solid var(--line);background:#eef0f3;display:block}.topic-book-cover-placeholder{min-height:138px}.topic-book-body h3{font-size:17px;line-height:1.35;margin:3px 0 12px}.topic-book-body h3 a{text-decoration:none}.topic-book-body h3 a:hover{text-decoration:underline}.topic-badges{display:flex;flex-wrap:wrap;gap:6px}.topic-badge{font-size:12px;line-height:1.25;padding:5px 8px;border-radius:999px;background:#f3f4f6;color:#4b5563}.topic-empty{text-align:center;padding:30px;color:var(--muted)}
[hidden]{display:none!important}

/* WCAG 2.2 AA-oriented accessibility hardening */
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.skip-link{position:absolute;left:-9999px;top:12px;z-index:9999}
.skip-link:focus-visible{left:12px;display:inline-flex;align-items:center;min-height:44px;padding:10px 14px;border:2px solid #0b57d0;border-radius:10px;background:#fff;color:#111827;text-decoration:none}
:focus-visible{outline:3px solid #0b57d0;outline-offset:3px;border-radius:4px}
.action,.btn,.book-tab,.author-lang-tab,.topic-chip{min-height:44px;display:inline-flex;align-items:center;justify-content:center}
.breadcrumbs a,.topic-book-body a,.profile-link{min-height:24px}
input,select{font-size:16px;min-height:48px;color:#171717}
.section p a,.section li a,.breadcrumbs a,.topic-book-body h3 a{text-decoration-thickness:.1em;text-underline-offset:.16em}
#main-content:focus{outline:none}

@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}
  .book-tab:hover,.google-books-preview .action:hover,.profile-link:hover{transform:none}
}
@media(prefers-contrast:more){
  :root{--muted:#3f3f46;--line:#8b8b93}
  .card,.action,.btn,.book-tab,.author-lang-tab,.topic-book-card,.topic-chip,.topic-search-panel{border-width:2px}
}
@media(forced-colors:active){
  :focus-visible{outline:3px solid Highlight}
  .action,.btn,.book-tab,.author-lang-tab,.topic-chip,.card,.topic-book-card{forced-color-adjust:auto}
}

@media(max-width:700px){.book-top{grid-template-columns:1fr}.book-top img{max-width:280px}.google-books-preview{padding:24px 18px}.google-books-preview .preview-title{font-size:20px}.author-hero{grid-template-columns:1fr;text-align:center;padding:22px}.author-photo{width:180px;height:180px;margin:auto}.author-hero .actions{justify-content:center}.author-translate-box{grid-template-columns:1fr;text-align:center}.translate-mark{margin:auto}.author-translate-controls{justify-content:center}.profile-links{grid-template-columns:1fr}.topic-index-cta{grid-template-columns:1fr;text-align:center}.topic-index-icon{margin:auto}.topic-index-cta .actions{justify-content:center}.topic-books-grid{grid-template-columns:1fr}.topic-group-header{align-items:start;flex-direction:column}.topic-book-card{grid-template-columns:78px 1fr}.topic-book-cover{width:78px}}