.book-brand{text-decoration:none;color:var(--ink)}.book-brand:hover{color:var(--ink)}.book-top-nav{display:flex;align-items:center;gap:28px;height:100%;font-size:12px}.book-top-nav a{display:flex;align-items:center;text-decoration:none;color:var(--muted);height:100%;position:relative}.book-top-nav a[aria-current=page]{color:var(--ink);font-weight:600}.book-top-nav a[aria-current=page]:after{content:"";position:absolute;left:0;right:0;bottom:0;background:var(--accent);height:2px}.books-main{max-width:1440px;margin:0 auto;padding:38px 60px 28px}.books-main .breadcrumb{margin-bottom:36px}.books-main .breadcrumb a{color:var(--muted);text-decoration:none}.books-intro{display:grid;grid-template-columns:minmax(0,1fr) minmax(280px,.8fr);gap:80px;padding:0 0 36px;align-items:center}.book-course-title{font-size:12px;color:var(--accent);margin:0 0 18px;line-height:1.7}.books-intro h1{font-family:Georgia,"Songti SC","STSong",serif;font-size:42px;line-height:1.5;font-weight:500;letter-spacing:-.025em;margin:0 0 18px}.books-intro h1 em{font-style:normal;color:var(--accent)}.books-lead{font-size:13px;line-height:1.9;color:var(--muted);margin:0}.books-intro-aside{max-width:470px;justify-self:end}.book-tally{display:flex;align-items:baseline;gap:12px;font-size:12px;color:var(--muted);margin-bottom:19px}.book-tally strong{font-size:42px;line-height:1;font-family:Georgia,serif;font-weight:400;color:var(--ink);font-variant-numeric:tabular-nums}.book-scope{font-size:12px;line-height:1.95;color:var(--muted);margin-bottom:0;white-space:pre-line}.book-tools{display:flex;align-items:center;gap:12px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:18px 0;margin-bottom:37px}.book-search{flex:1;max-width:360px;min-width:180px}.book-filter{flex:0 1 185px;min-width:0}.book-filter select{width:100%;min-height:42px;padding:8px 28px 8px 12px;border:1px solid var(--line);background:transparent;border-radius:5px;font-size:12px;color:var(--ink)}.book-results{margin:0 0 0 auto;flex-shrink:0;font-size:11px;color:var(--muted);font-variant-numeric:tabular-nums}.book-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));column-gap:34px;row-gap:44px}.book-entry{min-width:0;display:flex;flex-direction:column}.book-cover-wrap{height:290px;display:flex;align-items:center;justify-content:center;padding:16px 18px 26px;background:var(--soft);border-radius:5px;margin-bottom:19px;position:relative;isolation:isolate}.book-cover-link{display:flex;max-width:100%;height:100%;align-items:center;justify-content:center}.book-cover{display:block;max-width:100%;max-height:100%;object-fit:contain;box-shadow:3px 4px 7px oklch(.3 .02 258 / .2);transition:transform .18s}.book-cover-link:hover .book-cover{transform:translateY(-3px)}.cover-label{position:absolute;bottom:7px;right:10px;font-size:9px;color:var(--muted);line-height:1.5}.cover-missing{display:flex;align-items:center;justify-content:center;flex-direction:column;text-align:center;max-width:190px;padding:20px;font-size:12px;color:var(--muted);line-height:1.8}.cover-missing span{font-size:28px;font-family:Georgia,serif;color:var(--accent);margin-bottom:12px}.cover-missing small{display:block;font-size:11px;margin-top:5px}.book-series-name{font-size:10px;line-height:1.6;color:var(--accent);margin:0 0 8px;min-height:16px}.book-entry h2{font-family:Georgia,"Songti SC","STSong",serif;font-size:21px;line-height:1.4;letter-spacing:-.015em;font-weight:500;margin:0 0 9px;overflow-wrap:anywhere;text-wrap:pretty}.book-author{font-size:11px;color:var(--muted);line-height:1.8;margin:0 0 13px}.book-lesson-links{display:flex;flex-wrap:wrap;gap:6px;margin:0 0 14px}.book-lesson-links a{font-size:10px;line-height:1.6;padding:5px 8px;color:var(--ink);text-decoration:none;background:var(--selected);border-radius:4px;overflow-wrap:anywhere;max-width:100%}.book-lesson-links a:hover{background:var(--line)}.book-note{font-size:11px;line-height:1.9;color:var(--muted);margin:0 0 14px}.book-evidence{margin-top:auto;border-top:1px solid var(--line);padding-top:10px}.book-evidence summary{cursor:pointer;font-size:10px;color:var(--muted);min-height:30px;line-height:1.8;padding:4px 0}.book-evidence summary:focus-visible{outline:3px solid var(--accent);outline-offset:3px}.book-evidence ol{margin:6px 0 13px;padding-left:18px;font-size:10px;line-height:1.9;color:var(--muted)}.book-evidence li+li{margin-top:11px}.book-evidence a{display:inline;color:var(--accent)}.book-evidence blockquote{padding:0;margin:4px 0 0;color:var(--ink);font-size:11px;line-height:1.9}.book-isbn{font-size:10px;color:var(--muted);margin:7px 0 8px;font-variant-numeric:tabular-nums;overflow-wrap:anywhere}.book-source-links{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;line-height:1.8;margin-top:5px}.book-source-links a{font-size:10px;text-decoration:none}.book-source-links a:hover{text-decoration:underline}.books-empty{padding:70px 20px 85px;text-align:center}.books-empty h2{font-size:20px;margin-bottom:14px;font-weight:500}.books-empty p{font-size:12px;color:var(--muted);line-height:1.9;margin-bottom:22px}.books-footer{display:flex;gap:18px;justify-content:space-between;flex-wrap:wrap;font-size:10px;line-height:1.8;color:var(--muted);border-top:1px solid var(--line);margin-top:55px;padding-top:24px}.books-footer a{text-decoration:none}.book-unknown-course{font-size:10px;color:var(--muted);line-height:1.8;margin-bottom:14px}@media(min-width:1450px){.books-main{padding:42px 70px 30px}.book-cover-wrap{height:310px}}@media(max-width:1100px){.books-main{padding:32px 36px 28px}.books-intro{gap:45px}.book-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:36px 28px}.book-cover-wrap{height:290px}.books-intro h1{font-size:36px}.book-tools{gap:10px}.book-filter{flex-basis:165px}.book-search{min-width:160px}}@media(max-width:760px){.book-top-nav{gap:19px;font-size:11px}.books-main{padding:25px 22px 25px}.books-main .breadcrumb{margin-bottom:30px}.books-intro{grid-template-columns:1fr;gap:25px;padding-bottom:28px}.books-intro h1{font-size:32px;line-height:1.45;margin-bottom:15px}.book-course-title{font-size:11px;margin-bottom:15px}.books-lead{font-size:12px}.books-intro-aside{max-width:none;justify-self:auto}.book-tally{margin-bottom:10px;gap:10px;font-size:11px}.book-tally strong{font-size:27px}.book-scope{font-size:11px;line-height:1.9}.book-tools{flex-wrap:wrap;gap:10px;padding:16px 0;margin-bottom:26px}.book-search{max-width:none;flex-basis:100%}.book-filter{flex:1 1 40%}.book-filter select{font-size:11px;min-height:38px;padding-left:9px}.book-results{font-size:10px;margin:0;width:100%;padding-top:3px}.book-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:30px 17px}.book-cover-wrap{height:218px;padding:13px 13px 23px;margin-bottom:14px}.book-entry h2{font-size:18px;line-height:1.4;margin-bottom:7px}.book-series-name{font-size:9px;margin-bottom:6px}.book-author{font-size:10px;margin-bottom:11px}.book-lesson-links{gap:5px;margin-bottom:12px}.book-lesson-links a{font-size:9px;padding:4px 6px}.book-note{font-size:10px;line-height:1.8}.cover-label{font-size:8px;right:8px}.book-source-links{gap:3px 8px}.book-source-links a{font-size:9px}.book-evidence summary{font-size:9px}.book-isbn{font-size:9px}.books-footer{font-size:9px;gap:8px 18px;margin-top:38px;padding-top:19px}.books-footer span:first-child{width:100%}}@media(max-width:390px){.book-cover-wrap{height:190px;padding:12px 10px 23px}.book-top-nav{gap:13px;font-size:10px}.books-main{padding-left:18px;padding-right:18px}.book-entry h2{font-size:16px}.book-grid{column-gap:14px}}@media(prefers-reduced-motion:reduce){.book-cover{transition:none}.book-cover-link:hover .book-cover{transform:none}}
.book-kind{display:inline-block;padding:2px 5px;background:var(--selected);color:var(--ink);border-radius:3px;margin-right:4px;font-size:9px}
.book-references{margin-top:48px;border-top:1px solid var(--line)}.reference-group{border-bottom:1px solid var(--line);padding:8px 0}.reference-group>summary{padding:18px 0;cursor:pointer;font-size:15px;font-weight:500;line-height:1.8}.reference-group>summary span{font-size:11px;font-weight:400;color:var(--muted);margin-left:12px}.reference-group>summary:focus-visible{outline:3px solid var(--accent);outline-offset:3px}.reference-group-note{font-size:12px;color:var(--muted);line-height:1.9;margin:0 0 23px}.reference-items{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 42px}.reference-item{min-width:0;padding:0 0 26px;font-size:11px;line-height:1.9;color:var(--muted)}.reference-item h3{font-family:Georgia,"Songti SC","STSong",serif;font-size:19px;font-weight:500;color:var(--ink);margin:0 0 8px;overflow-wrap:anywhere}.reference-item p{margin:0 0 9px;white-space:pre-line}.reference-item .reference-author{font-size:10px}.reference-evidence{padding-left:16px;margin:9px 0 0;font-size:10px}.reference-evidence li{margin-bottom:6px}.reference-evidence blockquote{margin:5px 0;color:var(--ink);font-size:11px;line-height:1.9}.reference-item>.book-lesson-links{margin:10px 0}.reference-item>a{font-size:10px;display:inline-block;margin-top:10px;text-decoration:none}.evidence-note{font-size:10px;line-height:1.9;color:var(--muted);margin:6px 0}@media(max-width:760px){.book-references{margin-top:35px}.reference-group>summary{font-size:13px;padding:14px 0}.reference-items{grid-template-columns:1fr}.reference-group-note{font-size:11px;margin-bottom:19px}.reference-item h3{font-size:18px}.reference-item{padding-bottom:22px}}
.books-empty.has-references{padding:28px 15px 22px}.books-empty.has-references h2{font-size:17px}.reference-item.has-cover{display:grid;grid-template-columns:66px minmax(0,1fr);gap:17px;align-items:start}.reference-cover{display:block}.reference-cover img{display:block;max-width:100%;height:auto;max-height:100px;object-fit:contain}.reference-copy{min-width:0}.reference-copy>.book-lesson-links{margin:10px 0}.reference-copy>a{font-size:10px;display:inline-block;margin-top:10px;text-decoration:none}