.series-explanation{font-size:1rem;line-height:1.85;color:#434343;max-width:72ch}
.book-card h2 a{text-decoration:none}.book-card h2 a:hover{text-decoration:underline}
.book-card p{font-size:1rem;line-height:1.75}.book-card .book-subtitle{font-weight:600;color:var(--ink)}
.book-card .eyebrow,.book-card .availability,.cover-view{font-size:.875rem}
.series-questions{margin-top:64px}.breadcrumbs{display:flex;flex-wrap:wrap;gap:8px 12px;color:var(--muted);font-size:.875rem;margin:0 0 32px}
.book-hero{display:grid;grid-template-columns:minmax(180px,.75fr) minmax(0,1.4fr);gap:clamp(28px,4vw,58px);align-items:center;padding-bottom:48px;border-bottom:1px solid var(--line)}
.detail-cover{display:block;max-width:320px;background:#161616;border:1px solid #303030;box-shadow:8px 14px 26px #0002}
.detail-cover img{display:block;width:100%;height:auto;aspect-ratio:992/1586}
.book-hero-copy{min-width:0}.book-hero h1{font-size:clamp(2.4rem,4.5vw,4.7rem);margin:18px 0 20px;overflow-wrap:break-word}
.book-hero .eyebrow{font-size:.875rem;color:var(--blue)}
.book-deck{font-family:var(--display);font-size:clamp(1.3rem,2vw,1.7rem);line-height:1.35;letter-spacing:-.025em}
.book-byline,.release-note{font-size:.875rem;color:var(--muted)}.book-audience{font-size:1rem;line-height:1.75;margin:24px 0}
.release-note{margin:16px 0 0}.book-reading-layout{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(235px,1fr);gap:42px;margin:48px 0}
.book-synopsis{max-width:70ch;margin:0}.book-synopsis h2{font-size:2rem;margin-top:16px}.book-synopsis p{font-size:1.0625rem;line-height:1.9}
.book-synopsis .source-note{font-size:.875rem;line-height:1.7}
.book-learning{align-self:start;padding:28px;background:#f1f1f1;border-top:3px solid var(--youtube-red)}
.book-learning h2{font-size:1.5rem}.book-learning ul{padding-left:20px;margin:0}.book-learning li{font-size:1rem;line-height:1.75;margin-bottom:15px}
.practical-record{border-top:1px solid #d2d2d2;margin-top:25px;padding-top:22px}.practical-record p{font-size:1rem;margin:10px 0 0}
.book-next{display:flex;align-items:center;justify-content:space-between;gap:32px;padding:30px;background:#171717;color:#fff;margin:20px 0 32px}
.book-next h2{font-size:1.65rem;margin:12px 0}.book-next p{color:#dedede;margin:0;font-size:1rem}.book-next .eyebrow{color:#ffb3c2}.book-next .button{background:#fff;color:#171717;flex-shrink:0}
.static-exercise{border:1px solid var(--line);padding:24px;margin:28px 0}.static-exercise h2{font-size:1.5rem}
.author-context{display:flex;align-items:baseline;flex-wrap:wrap;gap:5px 7px;font-size:.9375rem;line-height:1.65;margin:0 0 26px;color:var(--muted)}.author-context a{font-weight:650;color:var(--ink)}.author-context span{margin-left:8px;padding-left:14px;border-left:2px solid var(--youtube-red);color:var(--ink)}.author-profile{max-width:850px;padding:30px 32px;border-left:4px solid var(--youtube-red);background:#f1f1f1;margin:30px 0 38px;scroll-margin-top:30px}.author-profile h2{font-size:clamp(1.7rem,2.8vw,2.3rem);line-height:1.2;margin:16px 0 20px}.author-profile p{font-size:1rem;line-height:1.85;max-width:70ch}.author-profile .author-credential{font-size:1rem;font-weight:650;color:var(--blue);margin-bottom:14px}.author-profile .author-disclosure{font-size:.875rem;color:var(--muted);border-top:1px solid #d8d8d8;padding-top:17px;margin-bottom:0}.book-byline .author-background{display:block;color:var(--blue);font-weight:650;margin:7px 0}.books-intro .author-context{margin:20px 0 24px}@media(max-width:570px){.author-context span{flex-basis:100%;border-left:0;padding-left:0;margin-left:0}.author-profile{padding:24px}.author-profile h2{font-size:1.8rem}}
.purchase-box{border-top:1px solid var(--line);margin-top:24px;padding-top:20px}.purchase-box p{font-size:.9375rem;line-height:1.7;color:#565656;margin:9px 0 0}.purchase-box .button{max-width:100%;white-space:normal;text-align:center}.release-badge{display:inline-block;color:var(--blue);font-size:.875rem;font-weight:700;letter-spacing:.035em}.purchase-box.compact{padding-top:16px;margin-top:18px}.purchase-box.compact p{font-size:.875rem;margin-top:4px}.publisher-link{display:inline-block;margin-top:10px;font-size:.9375rem;color:var(--blue);font-weight:600}.publisher-byline{font-size:.875rem}.publisher-note{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.6fr);gap:35px;border-top:3px solid var(--youtube-red);padding:30px;background:#f1f1f1;margin:56px 0 0}.publisher-note h2{font-size:2rem;line-height:1.15;margin:15px 0 0}.publisher-note p{font-size:1rem;line-height:1.85;margin:0 0 16px}.publisher-note p:last-child{margin-bottom:0}
@media(max-width:650px){.publisher-note{grid-template-columns:1fr;padding:24px;gap:24px}.purchase-box .button{width:100%}}
@media(max-width:1100px){.book-reading-layout{grid-template-columns:1fr}.book-learning{max-width:70ch}.book-next{align-items:flex-start;flex-direction:column}.book-hero{gap:28px}}
@media(max-width:570px){.book-hero{grid-template-columns:1fr}.detail-cover{width:190px;max-width:60%;margin:0 auto}.book-hero-copy .eyebrow{margin-top:5px}.book-hero h1{font-size:2.7rem}.book-reading-layout{margin-top:32px;gap:25px}.book-card{grid-template-columns:1fr}.book-card .cover-link{max-width:200px;margin:0 auto 8px}.book-card .cover-link img{width:200px;max-width:100%}.book-card h2{font-size:1.8rem}.book-grid{gap:42px}.book-info .book-actions{align-items:flex-start}.book-card .button{font-size:.875rem}.book-learning{padding:23px}.book-next{padding:24px}.book-card .eyebrow,.book-card .availability{font-size:.875rem}}