:root{--ink:#17181b;--muted:#6f7279;--line:#e7e8eb;--soft:#f6f7f8;--accent:#6ee7b7}*{box-sizing:border-box;margin:0;padding:0}body{background:#fff;color:var(--ink);font-family:Pretendard,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}.books-inner{width:min(1120px,calc(100% - 48px));margin:0 auto}
.books-hero{padding:54px 0 46px;border-bottom:1px solid #2b313c;background:radial-gradient(circle at 80% 20%,rgba(110,231,183,.12),transparent 28%),radial-gradient(circle at 20% 10%,rgba(147,197,253,.1),transparent 24%),#0f1115;color:#f3f4f6}.books-hero h1{color:var(--accent);font-size:38px;line-height:1.15;letter-spacing:-1.4px}.books-hero p{margin-top:14px;color:#a8b0bd;font-size:15px;line-height:1.7}.global-header--adaptive+main .books-hero{padding-top:122px}.books-hero h1,.books-hero p{opacity:0;transform:translateY(18px);animation:hero-rise .62s cubic-bezier(.22,1,.36,1) forwards}.books-hero p{animation-delay:.1s}@keyframes hero-rise{to{opacity:1;transform:translateY(0)}}
.book-category-navigation{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:#fff}.book-category-row{min-height:56px;display:flex;align-items:stretch;gap:28px;overflow-x:auto;scrollbar-width:none}.book-category-row::-webkit-scrollbar{display:none}.book-category-row a{position:relative;display:flex;align-items:center;color:#62656c;font-size:14px;font-weight:650;text-decoration:none;white-space:nowrap;transition:color .2s,font-weight .2s}.book-category-row a::after{content:"";position:absolute;right:0;bottom:-1px;left:0;height:2px;background:transparent}.book-category-row a:hover,.book-category-row a.active{color:#000;font-weight:800}.book-category-row a:hover::after,.book-category-row a.active::after{background:#000}
.books-content{padding:46px 0 90px}.book-heading{margin-bottom:25px;padding-bottom:20px;border-bottom:1px solid var(--line);display:flex;align-items:flex-end;justify-content:space-between}.book-heading h2{font-size:24px;letter-spacing:-.8px}.book-heading p{margin-top:7px;color:var(--muted);font-size:13px}.book-heading>span{color:#92949a;font-size:12px}.book-heading b{margin-right:2px;color:var(--ink);font-size:14px}.book-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:40px 22px}.book-card{min-width:0}.book-cover{height:340px;padding:25px;display:flex;align-items:center;justify-content:center;background:#f2f3f5;transition:transform .2s,box-shadow .2s}.book-cover img{max-width:100%;height:100%;object-fit:contain;filter:drop-shadow(0 12px 12px rgba(0,0,0,.18));transition:transform .24s}.book-card:hover .book-cover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(20,21,28,.1)}.book-card:hover .book-cover img{transform:scale(1.018)}.book-copy{padding-top:15px}.book-copy>span,.book-detail-copy>span{color:#5b4de4;font-size:10px;font-weight:800;letter-spacing:.55px}.book-copy h3{margin-top:8px;font-size:18px;line-height:1.42;letter-spacing:-.55px}.book-copy>p{height:44px;margin-top:8px;overflow:hidden;color:#74777e;font-size:13px;line-height:1.65;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}.book-actions{margin-top:17px;display:grid;grid-template-columns:1fr 1.15fr;gap:8px}.book-actions a,.purchase-button{min-height:42px;padding:0 12px;display:flex;align-items:center;justify-content:center;border:1px solid #d9dbe0;color:#34363c;font-size:12px;font-weight:750;text-align:center;text-decoration:none}.book-actions .purchase-button,.book-detail-copy>.purchase-button{border-color:#17181b;background:#17181b;color:#fff}.book-actions a:hover{border-color:#000}.book-actions .purchase-button:hover,.book-detail-copy>.purchase-button:hover{background:#000}.book-notice{padding:70px 0;text-align:center;color:#85878d}.book-notice strong{display:block;margin-bottom:9px;color:var(--ink);font-size:18px}.book-notice p{font-size:13px}.affiliate-disclosure{margin-top:55px;padding-top:18px;border-top:1px solid var(--line);color:#888b91;font-size:11px;line-height:1.65}
.site-footer{padding:42px 0;border-top:1px solid var(--line)}.site-footer .books-inner{display:grid;grid-template-columns:1fr auto;gap:7px}.footer-logo{color:var(--ink);font-size:16px;font-weight:850;letter-spacing:1.2px;text-decoration:none}.site-footer p{color:#777a80;font-size:12px}.site-footer span{grid-column:2;grid-row:1/3;align-self:center;color:#a0a2a7;font-size:10px}
.book-detail-page{min-height:100vh;padding:124px 0 90px;background:#f7f8f9}.book-back{display:inline-block;margin-bottom:28px;color:#676a71;font-size:13px;text-decoration:none}.book-back:hover{color:#000}.book-detail{padding:48px;display:grid;grid-template-columns:320px 1fr;gap:58px;background:#fff;border:1px solid var(--line)}.book-detail-cover{height:440px;padding:32px;display:flex;align-items:center;justify-content:center;background:#f0f1f3}.book-detail-cover img{max-width:100%;height:100%;object-fit:contain;filter:drop-shadow(0 14px 14px rgba(0,0,0,.2))}.book-detail-copy h1{margin-top:10px;font-size:34px;line-height:1.28;letter-spacing:-1.2px}.book-meta{margin-top:10px;color:#85888f;font-size:13px}.book-detail-copy>strong{display:block;margin-top:30px;padding-left:15px;border-left:3px solid var(--accent);font-size:16px;line-height:1.7}.book-introduction{margin:28px 0;color:#555960;font-size:14px;line-height:1.9;white-space:pre-wrap}.book-detail-copy>.purchase-button{width:220px}.book-detail-copy>small{display:block;margin-top:10px;color:#92959b;font-size:10px}
@media(max-width:900px){.book-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.book-detail{grid-template-columns:250px 1fr;gap:35px}.book-detail-cover{height:360px}}@media(max-width:640px){.books-inner{width:calc(100% - 32px)}.global-header--adaptive+main .books-hero{padding-top:96px}.books-hero{padding:36px 0 30px}.books-hero h1{font-size:31px}.books-hero p{font-size:13px}.book-category-row{min-height:50px;gap:22px}.book-category-row a{font-size:13px}.books-content{padding:34px 0 72px}.book-heading{align-items:flex-start}.book-heading h2{font-size:21px}.book-grid{grid-template-columns:1fr;gap:34px}.book-cover{height:360px}.book-detail-page{padding:98px 0 60px}.book-detail{padding:24px;grid-template-columns:1fr;gap:30px}.book-detail-cover{height:380px}.book-detail-copy h1{font-size:27px}.book-detail-copy>.purchase-button{width:100%}.site-footer .books-inner{display:block}.site-footer p{margin-top:8px}.site-footer span{display:block;margin-top:18px}}@media(prefers-reduced-motion:reduce){.books-hero h1,.books-hero p{opacity:1;transform:none;animation:none}}