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@media(min-width:1500px){.hero h1{font-size:87px}.hero-art{min-height:650px}.book-object{width:285px}}
@media(max-width:1100px){.wrap{width:calc(100% - 72px)}.site-header{padding:0 36px}.site-header nav{gap:23px}.hero{min-height:690px;padding-top:50px;padding-bottom:50px;gap:13px}.hero h1{letter-spacing:-3.5px;font-size:65px}.hero-art{min-height:550px}.book-object{width:230px}.block-one{left:2px;top:86px}.block-two{right:0;top:285px}.block-three{left:15px;bottom:122px}.label-one{right:-2px;top:127px}.label-two{left:0;bottom:180px}.orbit-one{width:330px;height:330px}.orbit-two{width:270px;height:270px}.hero-description{font-size:14px}.strip-inner{gap:23px;font-size:12px}.strip-note{font-size:8px}.about{gap:55px}.section{padding-top:85px;padding-bottom:85px}.book-facts{grid-template-columns:1fr 1.5fr 1.5fr;gap:10px}.book-facts strong{font-size:27px}.book-facts>div>span{font-size:9px}.contents-grid{gap:48px}.lab-answer,.lab-prompt{padding-left:26px;padding-right:26px}.lab-prompt h3{font-size:23px}.lab-answer h3{font-size:21px}.quiz-section{gap:43px}.quiz-card{padding:27px}.quiz-card h3{font-size:23px}.author-grid{gap:43px}.book-section{gap:45px}.footer-brand{gap:18px}}
@media(max-width:800px){.wrap{width:calc(100% - 48px)}.site-header{height:78px;padding:0 24px}.site-header nav>a:not(.nav-cta){display:none}.site-header .nav-cta{padding:8px 12px;font-size:11px;gap:14px}.brand{font-size:15px}.brand small{font-size:6px;letter-spacing:1.1px}.brand-mark{width:35px;height:35px;line-height:37px;font-size:25px}.hero{grid-template-columns:1fr;padding:44px 0 42px;gap:5px}.hero h1{font-size:clamp(52px,9.5vw,75px);letter-spacing:-3px}.hero .eyebrow{margin-bottom:26px}.hero-description{font-size:15px;line-height:1.9;margin-top:24px}.hero-art{min-height:530px;margin:15px 0 0}.book-object{width:236px}.block-one{left:13%;top:100px}.block-two{right:15%;top:298px}.block-three{left:12%;bottom:135px}.label-one{right:7%;top:143px}.label-two{left:7%;bottom:170px}.art-index{top:15px;left:10px}.art-caption{bottom:5px}.plus-one{right:7%}.plus-two{left:4%}.orbit-one{width:370px;height:370px}.art-control{bottom:35px}.byline{margin-top:23px}.strip-inner{justify-content:space-between;gap:6px;padding:19px 0;font-size:11px}.strip-inner b{font-size:20px}.strip-note{display:none}.section{padding-top:68px;padding-bottom:68px}h2{font-size:35px;letter-spacing:-1.6px}.eyebrow{font-size:10px;margin-bottom:20px;letter-spacing:1.5px}.about{grid-template-columns:1fr;gap:30px}.about-body>.lead{font-size:23px}.book-facts{margin-top:26px;grid-template-columns:1fr 1.35fr 1.3fr}.book-facts strong{font-size:32px}.book-facts>div>span{font-size:10px}.section-heading-row{display:block;margin-bottom:28px}.section-intro{margin-top:23px;font-size:13px}.lab-toolbar{padding:15px 19px}.lab-toolbar>.mono{font-size:8px}.scenario-tabs{padding:16px 18px;gap:6px}.scenario-tabs button{font-size:11px;padding:9px 10px;flex:1}.lab-grid{grid-template-columns:1fr}.lab-prompt{border-right:0;border-bottom:1px solid var(--line);padding:26px 23px}.lab-prompt h3{font-size:24px;margin-top:10px}.lab-prompt p{max-width:none;padding-right:46px}.lab-symbol{left:auto;right:23px;bottom:29px;display:grid;grid-template-columns:1fr 1fr;gap:4px}.lab-symbol span{width:11px;height:11px}.lab-answer{padding:29px 23px 25px;min-height:320px}.lab-answer h3{font-size:23px}.lab-answer>p{font-size:14px}.step-tabs button{font-size:11px;min-height:66px;padding:8px 2px}.step-tabs button span{display:block;font-size:9px;margin:0 0 1px}.lab-section .source-note{font-size:11px}.quiz-section{grid-template-columns:1fr;gap:29px}.quiz-intro>p:not(.eyebrow){margin-top:21px}.quiz-progress{margin-top:22px}.quiz-card{padding:26px;min-height:285px}.quiz-card h3{font-size:24px}.contents-grid{grid-template-columns:1fr;gap:35px}.contents-intro{position:static}.contents-intro>.button{margin-top:24px}.contents-intro>p.source-note{font-size:11px;margin-top:12px}.chapter-list summary{gap:15px;padding:21px 0}.chapter-list h3{font-size:15px}.chapter-body{padding-left:30px}.worksheet-grid{grid-template-columns:1fr}.worksheet-grid label{padding:24px}.worksheet-bottom{flex-direction:column;align-items:stretch;gap:18px}.worksheet-bottom>div{gap:0}.worksheet-bottom>.button{justify-content:space-between}.result-card{padding:26px 23px}.result-card dl{grid-template-columns:1fr;gap:21px}.result-actions .button{font-size:12px;gap:16px;padding:14px 17px}.author-grid{grid-template-columns:1fr;gap:37px}.author-copy>.eyebrow{margin-bottom:18px}.author-copy>p:not(.eyebrow):not(.source-note):not(.quote-credit){margin-top:18px}.author-copy blockquote{font-size:26px}.author-copy>.source-note{font-size:11px}.book-section{grid-template-columns:1fr;gap:23px}.book-end-art{min-height:350px}.book-end-art img{width:190px}.book-end-copy>.eyebrow{margin-top:15px}.book-end-copy h2{font-size:32px}.book-end-copy h3{margin-top:27px;font-size:23px}.book-end-copy>p:not(.eyebrow):not(.source-note){font-size:13px}.book-metadata{gap:10px 19px;font-size:11px;margin:22px 0}.buy-links .button{flex:1;padding:16px;font-size:12px;gap:15px}.footer-brand{font-size:21px;gap:15px}.footer-brand span{font-size:10px}.footer-top>.text-button{font-size:11px;gap:10px}.footer-bottom{flex-direction:column;gap:6px;margin-top:17px;padding-top:19px;font-size:9px}.footer-note{font-size:9px}.site-footer{padding:27px 0}.desktop-break{display:none}dialog{padding:23px;max-height:88dvh}dialog h2{font-size:28px;margin-top:21px}dialog blockquote{font-size:20px;min-height:180px}.dialog-head .eyebrow{font-size:8px}.preview-comment{font-size:12px}}
@media(max-width:390px){.wrap{width:calc(100% - 36px)}.site-header{padding:0 18px}.hero h1{font-size:51px}.hero-art{min-height:505px}.book-object{width:220px}.block-one{left:4%;width:55px;height:55px}.block-two{right:3%;width:52px;height:82px}.block-three{left:6%;width:85px;height:52px}.label-one{right:0}.label-two{left:0}.orbit-one{width:300px;height:300px}.orbit-two{width:250px;height:250px}.hero-actions{gap:24px}.hero-actions>.button{padding:16px 20px;font-size:13px;gap:22px}.hero-actions>.text-button{font-size:13px}.strip-inner{font-size:10px;gap:3px}.scenario-tabs button{font-size:10px;padding:9px 6px}.quiz-options button{padding:12px;font-size:12px}.quiz-card{padding:23px}.book-facts strong span{font-size:11px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}
@media print{.site-header,.hero,.principle-strip,.about,.lab-section,.quiz-section,.contents-section,.author-section,.book-section,.site-footer,.worksheet-section>.section-heading-row,#worksheet-form,.result-actions,.reading-progress{display:none!important}body{background:white}.worksheet-section{padding:0;width:100%}.result-card{display:block!important;background:white;border:0}.result-card dl{grid-template-columns:1fr}.result-card .source-note{display:none}}

.hero-art{mask-image:none}.art-caption{color:#58634e}.art-index{color:#58634e}

.video-card video{display:block;width:100%;height:100%;object-fit:contain}