.books-app{--ct-bg:#f6f5f0;--ct-ink:#253c3d;--ct-muted:#63706a;--ct-line:#253c3d24;--books-display:#e9ece5}.books-app .ct-header{min-height:94px;padding:23px 5vw}.books-app .ct-header nav{gap:31px;font-size:13px}.books-app .ct-nav-cta{border:0;border-bottom:1px solid var(--ct-line);padding:10px 0}.books-app main{max-width:1600px;margin:0 auto}.books-feature{grid-template-columns:1.08fr 1fr;align-items:center;gap:clamp(48px,7vw,108px);padding:58px 7vw 88px;scroll-margin-top:24px;display:grid}.books-display{background:var(--books-display);justify-content:center;align-items:center;min-height:560px;padding:56px 35px 76px;display:flex;position:relative}.books-cover-button{--book-depth:28px;--book-half:14px;perspective:1400px;background:0 0;border:0;width:274px;max-width:82%;height:407px;padding:0;display:block;position:relative}.books-volume{transform-style:preserve-3d;transition:transform .75s cubic-bezier(.2,.7,.2,1);display:block;position:absolute;inset:0;transform:rotateX(-7deg)rotateY(-23deg)rotate(-2deg)}.books-book-front,.books-book-back{backface-visibility:hidden;background:#eeede6;border-radius:1px 3px 3px 1px;display:block;position:absolute;inset:0}.books-book-front{transform:translateZ(var(--book-half));overflow:hidden;box-shadow:inset 1px 0 1px #fff8,1px 1px 2px #253c3d25}.books-book-front img{object-fit:contain;width:100%;height:100%;display:block}.books-book-front:after{content:"";pointer-events:none;background:linear-gradient(90deg,#0002,#0000 2%,#fff3 3%,#0001 4%,#0000 7% 97%,#0001);position:absolute;inset:0}.books-book-back{transform:translateZ(calc(-1 * var(--book-half))) rotateY(180deg);background:#d6d5c9}.books-book-spine{width:var(--book-depth);writing-mode:vertical-rl;color:#293b37;backface-visibility:hidden;background:linear-gradient(90deg,#c4c4b6,#e3e2d6 30%,#d3d2c6);justify-content:space-between;align-items:center;height:100%;padding:25px 0;font-size:13px;display:flex;position:absolute;top:0;left:0;transform:translate(-50%)rotateY(-90deg)}.books-book-spine small{writing-mode:vertical-rl;font:8px Georgia,serif}.books-book-pages{width:calc(var(--book-depth) - 2px);backface-visibility:hidden;background:repeating-linear-gradient(90deg,#eeeade 0,#fdfcf5 1px,#d8d5c8 1.5px,#f4f1e8 2px);height:calc(100% - 6px);position:absolute;top:3px;right:0;transform:translate(50%)rotateY(90deg);box-shadow:inset 1px 0 4px #6f715025}.books-book-top,.books-book-bottom{width:calc(100% - 4px);height:calc(var(--book-depth) - 2px);backface-visibility:hidden;background:repeating-linear-gradient(0deg,#f7f5eb 0,#dddacd 1px,#eeeade 2px);position:absolute;left:2px}.books-book-top{top:0;transform:translateY(-50%)rotateX(90deg)}.books-book-bottom{bottom:0;transform:translateY(50%)rotateX(-90deg)}.books-book-shadow{filter:blur(17px);pointer-events:none;background:#263b2f38;position:absolute;inset:7% 0 0 4%;transform:translate3d(15px,25px,-24px)}@media (hover:hover){.books-cover-button:hover{transform:none}.books-cover-button:hover .books-volume{transform:translateY(-10px)rotateX(-4deg)rotateY(-10deg)rotate(0)}}.books-cover-button:focus-visible .books-volume{transform:translateY(-7px)rotateX(-4deg)rotateY(-10deg)}.books-display-caption{color:var(--ct-muted);justify-content:space-between;align-items:center;gap:16px;font-size:11px;display:flex;position:absolute;bottom:24px;left:28px;right:28px}.books-display-caption button{color:var(--ct-ink);background:0 0;border:0;padding:8px 0;font-size:11px}.books-display-caption button span{margin-left:14px}.books-detail{min-width:0;max-width:455px;padding:4px 0}.books-app .books-kicker{letter-spacing:2px;color:var(--ct-muted);margin:0 0 31px;font-size:10px}.books-switch{border-bottom:1px solid var(--ct-line);gap:29px;margin-bottom:34px;display:flex}.books-switch button{color:var(--ct-muted);white-space:nowrap;background:0 0;border:0;padding:0 0 14px;font-size:13px;position:relative}.books-switch button:after{content:"";background:var(--ct-ink);transform-origin:0;height:2px;transition:transform .22s;position:absolute;bottom:-1px;left:0;right:0;transform:scaleX(0)}.books-switch [aria-pressed=true]{color:var(--ct-ink)}.books-switch [aria-pressed=true]:after{transform:scaleX(1)}.books-app .books-title-group h1{letter-spacing:-2.8px;margin:0 0 18px;font-size:clamp(42px,4vw,58px);font-weight:400;line-height:1.18}.books-app .books-title-group h1.is-english{letter-spacing:-2px;font-family:Georgia,serif}.books-app .books-subtitle{letter-spacing:-.45px;margin:0;font-size:16px;line-height:1.7}.books-app .books-byline{color:var(--ct-muted);gap:16px;margin:20px 0 0;font-size:12px;display:flex}.books-byline span{border-left:1px solid var(--ct-line);padding-left:16px}.books-app .books-description{color:var(--ct-muted);word-break:keep-all;max-width:410px;margin:30px 0 32px;font-size:14px;line-height:1.9}.books-purchase-summary{border-top:1px solid var(--ct-line);padding-top:23px}.books-price{flex-wrap:wrap;align-items:baseline;gap:16px;display:flex}.books-price strong{letter-spacing:-.7px;font-variant-numeric:tabular-nums;font-size:25px;font-weight:400}.books-price span{color:var(--ct-muted);font-size:11px}.books-app .books-offer-note{color:var(--ct-muted);margin:12px 0 0;font-size:11px;line-height:1.8}.books-app .books-purchase-button{border:1px solid var(--ct-ink);background:var(--ct-ink);color:#fffefa;justify-content:space-between;align-items:center;width:100%;margin-top:22px;padding:17px 22px;font-size:13px;transition:background .2s;display:flex}.books-purchase-button:hover{background:#3d5753}.books-purchase-button>span:last-child{transition:transform .2s}.books-purchase-button:hover>span:last-child{transform:translate(2px,-2px)}.books-app .books-sales-note{color:var(--ct-muted);text-align:center;margin:13px 0 0;font-size:11px}.books-story{border-top:1px solid var(--ct-line);grid-template-columns:.7fr 1.6fr;gap:70px;margin:0 7vw;padding:83px 0 88px;display:grid}.books-story-label{letter-spacing:-.6px;font:25px/1.4 Georgia,serif}.books-app .books-story h2{letter-spacing:-1.7px;margin:-7px 0 28px;font-size:clamp(27px,2.6vw,38px);line-height:1.5}.books-story-copy{grid-template-columns:1fr 1fr;gap:32px;display:grid}.books-story-copy p{color:var(--ct-muted);word-break:keep-all;margin:0;font-size:13px;line-height:2}.books-principles{margin:34px 0 0}.books-principles>div{grid-template-columns:185px 1fr;align-items:baseline;gap:24px;padding:18px 0;display:grid}.books-principles>div+div{border-top:1px solid var(--ct-line)}.books-principles dt{font-size:14px}.books-principles dt span{color:var(--ct-muted);margin-top:4px;font:13px/1.5 Georgia,serif;display:block}.books-principles dd{color:var(--ct-muted);word-break:keep-all;margin:0;font-size:12px;line-height:1.8}.books-information{border-top:1px solid var(--ct-line);grid-template-columns:.7fr 1.6fr;gap:70px;margin:0 7vw;padding:67px 0 80px;display:grid}.books-app .books-information h2{letter-spacing:-1px;font-size:24px}.books-information-heading p{color:var(--ct-muted);margin:13px 0 24px;font-size:12px}.books-information-heading>a{border-bottom:1px solid var(--ct-line);align-items:center;gap:35px;padding-bottom:8px;font-size:12px;display:inline-flex}.books-faq details{border-bottom:1px solid var(--ct-line);padding:0}.books-faq details:first-child{margin-top:-20px}.books-faq summary{cursor:pointer;padding:22px 34px 22px 0;font-size:14px;line-height:1.6;list-style:none;position:relative}.books-faq summary::-webkit-details-marker{display:none}.books-faq summary:after{content:"+";color:var(--ct-muted);font:23px Georgia,serif;position:absolute;top:19px;right:1px}.books-faq details[open] summary:after{content:"−"}.books-faq p{color:var(--ct-muted);max-width:620px;margin:0;padding:0 30px 24px 0;font-size:12px}.books-faq p a{text-underline-offset:3px;text-decoration:underline}.books-colophon{color:var(--ct-muted);flex-wrap:wrap;gap:6px 23px;margin:0 7vw;padding:20px 0 28px;font-size:10px;line-height:1.8;display:flex}.books-app .ct-footer{padding:39px 7vw 30px}.books-app .books-dialog{opacity:1;background:var(--ct-bg);color:var(--ct-ink);border:0;width:min(570px,100% - 32px);max-height:90dvh;margin:auto;padding:42px;font-family:Noto Sans KR,sans-serif;transition:none;position:fixed;inset:0;overflow:auto;transform:none;animation:none!important}.books-dialog::backdrop{-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px);background:#182c2bbb}.books-close{color:var(--ct-ink);z-index:2;background:0 0;border:0;width:40px;height:40px;position:absolute;top:10px;right:12px;font-size:27px!important}.books-dialog-top{align-items:center;gap:25px;padding-top:12px;display:flex}.books-dialog-top>img{width:86px;height:auto;box-shadow:4px 5px 10px #0002}.books-dialog-top h2{letter-spacing:-.8px;margin:0 0 10px;font:30px/1.3 Georgia,Noto Sans KR,sans-serif}.books-dialog-top .books-format{letter-spacing:1px;color:var(--ct-muted);margin:0 0 10px;font-size:9px}.books-dialog-top p:not(.books-format){font-size:11px;line-height:1.8}.books-dialog-top span{color:var(--ct-muted);font-size:11px}.books-dialog-info{margin-top:30px}.books-dialog-info dl>div{border-top:1px solid var(--ct-line);justify-content:space-between;gap:18px;padding:15px 0;font-size:12px;display:flex}.books-dialog-info dd{margin:0}.books-dialog-info dt{color:var(--ct-muted)}.books-dialog-info select{background:var(--ct-paper);border:1px solid var(--ct-line);font:inherit;color:var(--ct-ink);padding:4px 15px}.books-dialog-info .books-total{padding:22px 0;font-size:19px}.books-dialog-info .books-total dt{font-size:13px}.books-pay-later{color:#596852;border:1px solid var(--ct-line);background:#e3e8df;width:100%;padding:17px;font-size:13px}.books-app .books-pay-later:disabled{cursor:not-allowed;opacity:1}.books-preview-notice{color:var(--ct-muted);text-align:center;margin:17px 0 0;font-size:11px;line-height:1.9}.books-app .books-dialog.cover-dialog{background:var(--books-display);width:min(660px,100% - 24px);max-width:none;padding:64px 35px 48px}.books-enlarged-display{flex-direction:column;align-items:center;gap:24px;display:flex}.books-cover-button.books-cover-preview{--book-width:min(390px,calc(100vw - 116px),calc((90dvh - 180px) * .673219));--book-depth:calc(var(--book-width) * .10219);--book-half:calc(var(--book-depth) / 2);width:var(--book-width);aspect-ratio:274/407;flex:none;max-width:none;height:auto}.books-app .books-enlarged-caption{color:var(--ct-muted);text-align:center;margin:0;font-size:11px;line-height:18px}@media (width<=1050px){.books-feature{gap:45px;padding:45px 5vw 65px}.books-display{min-height:520px;padding:50px 25px 75px}.books-cover-button{width:236px;height:350px}.books-detail{max-width:none}.books-description{margin:24px 0!important}.books-story,.books-information{grid-template-columns:.6fr 1.6fr;gap:40px;margin:0 5vw}.books-principles>div{grid-template-columns:140px 1fr;gap:18px}}@media (width<=720px){.books-app .ct-header{grid-template-columns:1fr auto;gap:22px 12px;min-height:0;padding:21px 6vw 14px;display:grid}.books-app .ct-brand{font-size:28px}.books-app .ct-brand span{letter-spacing:1.6px;margin-top:8px;font-size:7px}.books-app .ct-nav-cta{white-space:nowrap;grid-area:1/2;padding:9px 0;font-size:11px}.books-app .ct-nav-cta span{margin-left:13px}.books-app .ct-header nav{grid-area:2/1/auto/-1;justify-content:space-between;gap:15px;width:100%;font-size:12px}.books-app .ct-header nav a{padding:4px 0 7px}.books-feature{grid-template-columns:1fr;gap:34px;padding:25px 6vw 57px}.books-display{min-height:380px;padding:32px 22px 62px}.books-cover-button{--book-depth:22px;--book-half:11px;width:195px;max-width:80%;height:290px}.books-display-caption{font-size:10px;bottom:14px;left:19px;right:19px}.books-display-caption button{font-size:10px}.books-detail{padding:0}.books-app .books-kicker{letter-spacing:1.7px;margin-bottom:22px;font-size:9px}.books-switch{gap:30px;margin-bottom:27px}.books-switch button{padding-bottom:13px;font-size:13px}.books-app .books-title-group h1{letter-spacing:-2px;margin-bottom:15px;font-size:43px}.books-app .books-subtitle{font-size:15px}.books-app .books-byline{margin-top:17px;font-size:11px}.books-app .books-description{font-size:13px;margin:24px 0 26px!important}.books-price strong{font-size:24px}.books-price span{font-size:10px}.books-purchase-summary{padding-top:21px}.books-story{margin:0 6vw;padding:42px 0 46px;display:block}.books-story-label{margin-bottom:29px;font-size:23px}.books-app .books-story h2{letter-spacing:-1.3px;margin:0 0 23px;font-size:27px}.books-story-copy{grid-template-columns:1fr;gap:14px}.books-story-copy p{font-size:12px}.books-principles{margin-top:27px}.books-principles>div{grid-template-columns:103px 1fr;gap:20px;padding:16px 0}.books-principles dt{font-size:13px}.books-principles dt span,.books-principles dd{font-size:11px}.books-information{margin:0 6vw;padding:39px 0 43px;display:block}.books-app .books-information h2{font-size:23px}.books-information-heading p,.books-information-heading>a{font-size:12px}.books-faq{margin-top:31px}.books-faq details:first-child{margin-top:0}.books-faq summary{padding:19px 30px 19px 0;font-size:13px}.books-faq p{padding-bottom:21px;font-size:12px}.books-colophon{margin:0 6vw;padding-bottom:24px;font-size:9px}.books-colophon span{width:100%}.books-app .ct-footer{padding:31px 6vw}.books-app .books-dialog{padding:34px 23px 26px}.books-dialog-top{gap:19px}.books-dialog-top>img{width:73px}.books-dialog-top h2{font-size:25px}.books-dialog-info select{font-size:16px}}@media (prefers-reduced-motion:reduce){.books-app *,.books-app :after{scroll-behavior:auto;transition:none!important}.books-cover-button:hover{transform:none}.books-cover-button .books-volume,.books-cover-button:hover .books-volume,.books-cover-button:focus-visible .books-volume{transform:rotateX(-7deg)rotateY(-23deg)rotate(-2deg)}}