/* Books section, aligned with public/home/home.css tokens. */
.books-v2-page{background:var(--paper);color:var(--ink)}
.books-v2{width:min(calc(100% - var(--home-pad,5vw)*2),1280px);margin-inline:auto}
.books-kicker{display:flex;align-items:center;gap:11px;color:var(--muted);font-size:11px;letter-spacing:.14em;text-transform:uppercase}
.books-kicker:before{content:"";width:22px;height:1px;background:var(--accent)}
.books-intro{display:grid;grid-template-columns:1fr minmax(260px,.72fr);gap:50px;align-items:end;padding:76px 0 43px;border-bottom:1px solid var(--line)}
.books-intro h1{font-size:clamp(42px,6vw,72px);font-weight:450;letter-spacing:-.055em;line-height:1.12;margin-top:18px}
.books-intro p{max-width:560px;font-size:15px;line-height:1.95;color:var(--muted)}
.books-shelf{padding:24px 0 80px}
.books-shelf-head,.book-section-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin:0 0 18px}
.books-shelf-head h2,.book-section-head h2{font-size:22px;font-weight:450;letter-spacing:-.025em;margin-top:8px}
.books-shelf-head .small-note{font-size:12px;color:var(--muted)}
.books-cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
.books-card{display:grid;grid-template-columns:minmax(130px,.42fr) minmax(0,1fr);gap:clamp(20px,3vw,42px);padding:26px;background:var(--wash);border:1px solid var(--line);min-height:330px;transition:border-color .2s,transform .2s}
.books-card:hover{border-color:var(--accent);transform:translateY(-2px)}
.books-cover{position:relative;display:flex;flex-direction:column;min-height:276px;padding:21px 18px;background:#202722;color:#eff0e9;overflow:hidden;box-shadow:inset 5px 0 #738174,5px 7px 0 color-mix(in srgb,var(--ink) 12%,transparent)}
.books-cover:after{content:"";position:absolute;width:150px;height:150px;border:1px solid #ffffff25;border-radius:50%;right:-72px;top:38px;box-shadow:0 0 0 17px #ffffff0d,0 0 0 34px #ffffff08}
.books-cover--blockchain{background:#142333;box-shadow:inset 5px 0 #7696ac,5px 7px 0 color-mix(in srgb,var(--ink) 12%,transparent)}
.books-cover small{font-size:8px;letter-spacing:.13em;color:#c3cdc4;position:relative;z-index:1}
.books-cover strong{font-size:clamp(18px,2vw,27px);font-weight:500;line-height:1.45;margin-top:37px;position:relative;z-index:1;text-wrap:pretty}
.books-cover em{font-style:normal;margin-top:auto;padding-top:26px;font-size:8px;letter-spacing:.12em;color:#c3cdc4}
.books-card-copy{display:flex;flex-direction:column;min-width:0;align-items:flex-start}
.books-status{display:inline-flex;align-items:center;gap:8px;color:var(--muted);font-size:11px;line-height:1.5;letter-spacing:.04em}
.books-status:before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent);flex:none}
.books-card h3{font-size:clamp(20px,2.2vw,27px);font-weight:500;line-height:1.45;letter-spacing:-.03em;margin:13px 0 10px}
.books-card .book-deck{font-size:13px;line-height:1.85;color:var(--muted);margin:0 0 18px}
.books-meta{display:flex;flex-wrap:wrap;gap:8px 17px;margin:0 0 18px;font-size:11px;color:var(--soft)}
.books-card .books-action{margin-top:auto}
.books-action,.book-primary{display:inline-flex;align-items:center;justify-content:space-between;gap:26px;min-height:44px;padding:0 16px;background:var(--ink);color:var(--paper);font-size:12px;text-decoration:none;border:1px solid var(--ink);transition:opacity .2s}
.books-action:hover,.book-primary:hover{opacity:.78}
.books-action span:last-child,.book-primary span:last-child{font-size:18px;color:var(--accent)}
.book-detail{padding:28px 0 84px}
.book-crumb{display:flex;gap:10px;align-items:center;color:var(--muted);font-size:12px;margin:0 0 30px}
.book-crumb a:hover{color:var(--accent)}
.book-hero{display:grid;grid-template-columns:minmax(200px,.55fr) minmax(0,1.45fr);gap:clamp(34px,7vw,100px);align-items:center;padding:8px 0 54px;border-bottom:1px solid var(--line)}
.book-hero .books-cover{width:min(100%,310px);min-height:410px;padding:29px 26px}
.book-hero .books-cover strong{font-size:clamp(25px,3.3vw,40px);margin-top:62px}
.book-hero-copy h1{font-size:clamp(34px,5.2vw,62px);line-height:1.2;letter-spacing:-.045em;font-weight:480;margin:13px 0 10px;text-wrap:pretty}
.book-subtitle{font-size:16px;color:var(--muted);line-height:1.7;margin:0 0 20px}
.book-hero-copy .book-deck{max-width:750px;color:var(--muted);font-size:15px;line-height:1.95;margin:19px 0 22px}
.book-facts{display:flex;flex-wrap:wrap;gap:12px 28px;margin:0;color:var(--muted);font-size:12px}
.book-facts div{display:grid;gap:3px}.book-facts dt{font-size:10px;color:var(--soft);letter-spacing:.08em}.book-facts dd{margin:0;color:var(--ink)}
.book-hero-actions{display:flex;flex-wrap:wrap;gap:11px;margin-top:25px}
.book-secondary{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 16px;border:1px solid var(--line);font-size:12px}
.book-secondary:hover{border-color:var(--accent);color:var(--accent)}
.book-jump{display:flex;flex-wrap:wrap;gap:7px 21px;padding:13px 0;border-bottom:1px solid var(--line);font-size:11px;color:var(--muted)}
.book-jump a:hover{color:var(--accent)}
.book-section{padding:46px 0 42px;border-bottom:1px solid var(--line);scroll-margin-top:100px}
.book-section-head{align-items:center;margin-bottom:20px}.book-section-head .books-kicker{font-size:10px}
.book-section-intro{max-width:720px;color:var(--muted);font-size:13px;line-height:1.8;margin:0 0 20px}
.book-parts{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
.book-part{border-top:1px solid var(--line);background:var(--wash);padding:0 17px}
.book-part summary{display:grid;grid-template-columns:38px 1fr 20px;gap:11px;align-items:center;min-height:66px;cursor:pointer;list-style:none}
.book-part summary::-webkit-details-marker{display:none}.book-part summary .part-no{font:11px ui-monospace,monospace;color:var(--accent)}
.book-part summary strong{font-size:14px;font-weight:500;line-height:1.5}.book-part summary i{font-style:normal;color:var(--muted);font-size:19px;transition:transform .2s}.book-part[open] summary i{transform:rotate(45deg)}
.book-chapters{margin:0;padding:4px 0 15px 49px;list-style:none;display:grid;gap:8px}
.book-chapters a{font-size:12px;line-height:1.6;color:var(--muted)}.book-chapters a:hover{color:var(--accent)}
.book-curated{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 30px;border-top:1px solid var(--line)}
.book-curated a{position:relative;display:block;padding:19px 22px 20px 0;border-bottom:1px solid var(--line)}
.book-curated a:after{content:"↗";position:absolute;right:0;top:20px;color:var(--accent);font-size:16px}
.book-curated a:hover h3{color:var(--accent)}.book-curated .item-type{font-size:10px;color:var(--soft);letter-spacing:.08em}.book-curated h3{font-size:16px;line-height:1.5;font-weight:500;margin:7px 20px 5px 0}.book-curated p{font-size:12px;line-height:1.75;color:var(--muted);margin:0}.book-curated time{font-size:10px;color:var(--soft);display:block;margin-top:9px}
.book-empty{display:flex;align-items:flex-start;gap:13px;padding:17px 19px;background:var(--wash);color:var(--muted);font-size:12px;line-height:1.8;border-left:2px solid var(--line)}.book-empty:before{content:"—";color:var(--accent)}
.book-resources{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.book-resource{display:flex;align-items:center;justify-content:space-between;gap:15px;min-height:76px;padding:16px 18px;border:1px solid var(--line);background:var(--wash)}
.book-resource strong{font-size:13px;font-weight:500}.book-resource small{display:block;color:var(--muted);font-size:11px;margin-top:5px}.book-resource .resource-arrow{font-size:19px;color:var(--accent)}
.book-timeline{border-top:1px solid var(--line);display:grid;grid-template-columns:110px minmax(0,1fr);gap:9px 22px;padding:18px 0;border-bottom:1px solid var(--line)}
.book-timeline time{font:11px ui-monospace,monospace;color:var(--soft);padding-top:4px}.book-timeline strong{font-size:14px;font-weight:500}.book-timeline p{color:var(--muted);font-size:12px;line-height:1.75;margin:4px 0 0}
.book-bottom-cta{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:29px 0 0}.book-bottom-cta p{font-size:14px;color:var(--muted)}
.book-reader-page{--reading-measure:760px}.book-reader-top{width:min(calc(100% - var(--home-pad,5vw)*2),980px);margin:35px auto 0;padding-bottom:16px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;gap:14px;align-items:center;font-size:12px;color:var(--muted)}
.book-reader-top a:hover{color:var(--accent)}.book-reader-meta{width:min(calc(100% - var(--home-pad,5vw)*2),760px);margin:36px auto 20px}.book-reader-meta .books-kicker{margin-bottom:12px}.book-reader-meta h1{font-size:clamp(27px,4vw,44px);line-height:1.35;font-weight:500;letter-spacing:-.035em}.book-reader-meta p{color:var(--muted);font-size:12px;margin-top:10px}
.book-reading-progress{position:fixed;z-index:90;top:0;left:0;width:100%;height:2px;background:transparent}.book-reading-progress span{display:block;width:0;height:100%;background:var(--accent);transform-origin:left}
.book-reader-content{width:min(calc(100% - var(--home-pad,5vw)*2),760px);margin:0 auto 90px;font-size:16px;line-height:2;color:var(--ink);overflow-wrap:anywhere}
.book-reader-content.is-large{font-size:19px;line-height:2.05}.book-reader-content>h1:first-child{display:none}.book-reader-content h1{font-size:clamp(29px,4vw,42px);font-weight:500;line-height:1.35;letter-spacing:-.03em;margin:58px 0 22px}.book-reader-content h2{font-size:clamp(22px,3vw,30px);line-height:1.55;font-weight:500;margin:56px 0 18px;padding-top:8px;scroll-margin-top:92px}.book-reader-content h3{font-size:18px;line-height:1.65;font-weight:600;margin:33px 0 12px;scroll-margin-top:92px}.book-reader-content p{margin:0 0 1.2em;text-wrap:pretty}.book-reader-content blockquote{margin:22px 0;padding:10px 20px;border-left:2px solid var(--accent);color:var(--muted);background:var(--wash)}.book-reader-content ul,.book-reader-content ol{padding-left:1.5em;margin:0 0 1.4em}.book-reader-content li{padding-left:.2em;margin:.25em 0}.book-reader-content table{display:block;width:100%;max-width:100%;overflow-x:auto;border-collapse:collapse;margin:26px 0;font-size:13px;line-height:1.75}.book-reader-content th,.book-reader-content td{min-width:115px;padding:10px 12px;border:1px solid var(--line);text-align:left;vertical-align:top}.book-reader-content th{background:var(--wash);font-weight:600}.book-reader-content a{color:var(--accent);text-decoration:underline;text-underline-offset:3px}.book-reader-content hr{border:0;border-top:1px solid var(--line);margin:42px 0}.book-reader-content [id]{scroll-margin-top:90px}.book-reader-tools{display:flex;justify-content:space-between;align-items:center;gap:12px;width:min(calc(100% - var(--home-pad,5vw)*2),760px);margin:0 auto 24px;font-size:11px;color:var(--muted)}.book-reader-tools button{background:none;color:inherit;border:1px solid var(--line);padding:7px 10px;cursor:pointer}.book-reader-tools button:hover{border-color:var(--accent);color:var(--accent)}
@media(max-width:760px){.books-v2{width:calc(100% - 36px)}.books-intro{grid-template-columns:1fr;gap:17px;padding:48px 0 29px}.books-intro h1{font-size:48px}.books-cards{grid-template-columns:1fr;gap:13px}.books-card{grid-template-columns:118px minmax(0,1fr);gap:20px;padding:16px;min-height:0}.books-cover{min-height:205px;padding:15px 13px}.books-cover strong{font-size:17px;margin-top:26px}.books-card h3{font-size:19px}.books-card .book-deck{font-size:12px;margin-bottom:12px}.books-card .books-action{min-height:40px}.book-detail{padding-top:18px}.book-hero{grid-template-columns:104px minmax(0,1fr);gap:19px;padding-bottom:30px}.book-hero .books-cover{min-height:176px;padding:13px 12px;width:100%}.book-hero .books-cover strong{font-size:17px;margin-top:27px}.book-hero .books-cover small{font-size:6px}.book-hero .books-cover em{font-size:6px;padding-top:12px}.book-hero-copy h1{font-size:30px}.book-subtitle{font-size:13px;margin-bottom:12px}.book-hero-copy .book-deck{font-size:12px;line-height:1.8;margin:12px 0}.book-facts{gap:9px 15px;font-size:10px}.book-hero-actions{gap:7px;margin-top:14px}.book-primary,.book-secondary{min-height:40px;padding-inline:12px;font-size:11px}.book-jump{overflow-x:auto;flex-wrap:nowrap;white-space:nowrap;margin-inline:-18px;padding-inline:18px}.book-section{padding:34px 0}.book-section-head h2{font-size:19px}.book-parts,.book-curated,.book-resources{grid-template-columns:1fr}.book-part{padding-inline:12px}.book-curated{gap:0}.book-timeline{grid-template-columns:78px 1fr;gap:6px 12px}.book-bottom-cta{align-items:flex-start;flex-direction:column}.book-reader-top{width:calc(100% - 36px);margin-top:20px}.book-reader-meta,.book-reader-content,.book-reader-tools{width:calc(100% - 40px)}.book-reader-meta{margin-top:28px}.book-reader-content{font-size:15px;line-height:1.9}.book-reader-content h2{margin-top:42px}.book-reader-content table{font-size:12px}}
@media(prefers-reduced-motion:reduce){.books-card,.book-part summary i{transition:none}}

.book-outline-intro,.book-outline-closing{display:flex;flex-wrap:wrap;gap:8px 18px;padding:0;margin:0 0 18px;list-style:none}
.book-outline-intro a,.book-outline-closing a{font-size:12px;line-height:1.6;color:var(--muted);border-bottom:1px solid var(--line);padding:4px 0}
.book-outline-intro a:hover,.book-outline-closing a:hover{color:var(--accent);border-color:var(--accent)}
.book-part-extra{grid-column:1/-1}
.book-reader-toc{min-width:0;flex:1}
.book-reader-toc summary{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:39px;cursor:pointer;list-style:none;padding:8px 12px;border:1px solid var(--line);background:var(--wash);font-size:11px;color:var(--muted)}
.book-reader-toc summary::-webkit-details-marker{display:none}
.book-reader-toc[open] summary span:last-child{transform:rotate(45deg)}
.book-reader-toc nav{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 20px;max-height:38vh;overflow:auto;padding:9px 13px;border:1px solid var(--line);border-top:0;background:var(--wash)}
.book-reader-toc nav a{font-size:11px;line-height:1.6;color:var(--muted);padding:5px 0;border-bottom:1px solid color-mix(in srgb,var(--line) 65%,transparent)}
.book-reader-toc nav a.level-h3{padding-left:10px}.book-reader-toc nav a.level-h4{padding-left:20px;font-size:10px;color:var(--soft)}
.book-reader-toc nav a:hover{color:var(--accent)}
.book-reader-actions{display:flex;align-items:center;gap:12px;flex:none}
.book-reader-tools{align-items:flex-start}
.book-reader-content .footnote{font-size:14px;color:var(--muted)}.book-reader-content .footnote ol{padding-left:1.2em}.book-reader-content sup a{font-size:11px}
@media(max-width:760px){.book-reader-tools{display:grid;grid-template-columns:1fr;gap:9px}.book-reader-actions{width:100%;justify-content:space-between}.book-reader-toc nav{grid-template-columns:1fr;max-height:42vh}.book-part-extra{grid-column:auto}}

/* Long-form reading: persistent chapter navigation on desktop, compact disclosure on mobile. */
.book-reader-meta{width:min(calc(100% - var(--home-pad,5vw)*2),1280px);display:grid;grid-template-columns:minmax(210px,260px) minmax(0,760px);gap:clamp(32px,5vw,72px);margin:40px auto 30px}
.book-reader-meta-copy{grid-column:2;min-width:0}
.book-reader-layout{width:min(calc(100% - var(--home-pad,5vw)*2),1280px);margin:0 auto 96px;display:grid;grid-template-columns:minmax(210px,260px) minmax(0,760px);gap:clamp(32px,5vw,72px);align-items:start}
.book-reader-sidebar{position:sticky;top:94px;min-width:0;max-height:calc(100vh - 112px);display:flex;flex-direction:column;gap:18px}
.book-reader-toc{min-width:0;flex:1;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.book-reader-toc summary{display:flex;align-items:center;gap:10px;min-height:48px;padding:8px 2px;border:0;border-bottom:1px solid var(--line);background:transparent;color:var(--ink);font-size:12px;cursor:pointer;list-style:none}
.book-reader-toc summary::-webkit-details-marker{display:none}.book-reader-toc summary>span:first-child{font-size:13px;color:var(--ink)}
.book-reader-toc .toc-count{margin-left:auto;color:var(--soft);font:10px ui-monospace,monospace}.book-reader-toc .toc-toggle{color:var(--muted);font-size:16px;transition:transform .2s}.book-reader-toc[open] .toc-toggle{transform:rotate(45deg)}
.book-reader-toc nav{display:block;max-height:min(58vh,720px);overflow:auto;padding:8px 5px 12px 0;border:0;background:transparent;overscroll-behavior:contain;scrollbar-width:thin;scrollbar-color:var(--line) transparent}
.book-reader-toc nav a{display:block;padding:7px 9px;border:0;border-left:2px solid transparent;color:var(--muted);font-size:11px;line-height:1.55;text-decoration:none;transition:color .16s,background .16s,border-color .16s}
.book-reader-toc nav a.level-h3{padding-left:20px;font-size:10px}.book-reader-toc nav a.level-h4{padding-left:30px;font-size:10px;color:var(--soft)}
.book-reader-toc nav a:hover,.book-reader-toc nav a[aria-current="location"]{color:var(--ink);background:var(--wash);border-left-color:var(--accent)}
.book-reader-actions{display:grid;gap:10px;padding:0 2px}
.book-reader-progress-copy{display:flex;align-items:center;justify-content:space-between;gap:10px}.book-reader-progress-copy .books-kicker{font-size:9px;letter-spacing:.12em}.book-reader-progress-copy .books-kicker:before{display:none}.book-reader-progress-copy strong{font:11px ui-monospace,monospace;color:var(--ink)}
.book-reader-progress-track{height:2px;background:var(--line);overflow:hidden}.book-reader-progress-track span{display:block;width:0;height:100%;background:var(--accent);transition:width .12s linear}
.book-reader-actions button{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:42px;padding:0 10px;border:1px solid var(--line);background:transparent;color:var(--ink);font-size:11px;text-align:left;cursor:pointer}
.book-reader-actions button span:last-child{color:var(--accent);font-size:13px}.book-reader-actions button:hover{border-color:var(--accent)}
.book-reader-content{width:auto;max-width:none;min-width:0;margin:0;font-size:17px;line-height:2.05}
.book-reader-content h2{scroll-margin-top:104px}.book-reader-content h3{scroll-margin-top:104px}.book-reader-content [id]{scroll-margin-top:104px}
@media(max-width:980px) and (min-width:761px){.book-reader-meta,.book-reader-layout{grid-template-columns:minmax(190px,230px) minmax(0,1fr);gap:28px}.book-reader-content{font-size:16px;line-height:1.95}.book-reader-sidebar{top:88px}}
@media(max-width:760px){.book-reader-meta{width:calc(100% - 36px);display:block;margin:28px auto 22px}.book-reader-meta-copy{width:100%}.book-reader-layout{width:calc(100% - 36px);grid-template-columns:minmax(0,1fr);gap:20px;margin-bottom:64px}.book-reader-sidebar{position:static;max-height:none;gap:12px}.book-reader-toc{border:1px solid var(--line);background:var(--wash)}.book-reader-toc summary{min-height:44px;padding:7px 12px;border:0}.book-reader-toc nav{max-height:42vh;padding:4px 9px 10px;border-top:1px solid var(--line)}.book-reader-toc nav a{padding-block:8px}.book-reader-toc nav a.level-h3{padding-left:18px}.book-reader-toc nav a.level-h4{padding-left:27px}.book-reader-actions{grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:10px 14px;padding:0 2px}.book-reader-progress-copy{grid-column:1;grid-row:1}.book-reader-progress-track{grid-column:1;grid-row:2}.book-reader-actions button{grid-column:2;grid-row:1/3;min-height:42px;padding-inline:11px}.book-reader-content{font-size:16px;line-height:1.95}.book-reader-content h2{margin-top:38px}.book-reader-content table{font-size:12px}}

/* Breadcrumbs stay complete and readable, including long book titles. */
.book-crumb{width:100%;min-width:0;display:flex;flex-wrap:wrap;align-items:center;gap:6px 10px;font-size:14px;line-height:1.65;overflow-wrap:anywhere}
.book-crumb>a,.book-crumb>[aria-current="page"]{min-width:0;max-width:100%;overflow-wrap:anywhere}
.book-crumb>[aria-current="page"]{color:var(--ink)}
.book-reader-top{width:min(calc(100% - var(--home-pad,5vw)*2),1280px);margin:24px auto 0;padding-bottom:15px;display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:start;gap:16px;border-bottom:1px solid var(--line)}
.book-reader-crumb{margin:0;color:var(--muted);font-size:14px}
.book-reader-edition{padding-top:2px;white-space:nowrap;font-size:12px;line-height:1.6;color:var(--muted)}
.book-reader-toc nav a{padding:8px 10px;font-size:14px;line-height:1.7}
.book-reader-toc nav a.level-h3{padding-left:21px;font-size:13px}
.book-reader-toc nav a.level-h4{padding-left:32px;font-size:12px}
@media(max-width:760px){.book-crumb{gap:5px 8px;font-size:13px}.book-reader-top{width:calc(100% - 36px);grid-template-columns:minmax(0,1fr);gap:6px;margin-top:18px}.book-reader-crumb{font-size:13px}.book-reader-edition{justify-self:end;padding-top:0;font-size:11px}.book-reader-toc nav a{font-size:14px;padding:9px 10px}.book-reader-toc nav a.level-h3{font-size:13px;padding-left:19px}.book-reader-toc nav a.level-h4{font-size:12px;padding-left:28px}}