@font-face{font-family:'Salt Kakao Small';font-style:normal;font-weight:400;font-display:swap;src:url('https://t1.kakaocdn.net/kakaocorp/kakaocorp/service/fonts/KakaoSmall-Regular-v1.0.woff2') format('woff2')}@font-face{font-family:'Salt Kakao Small';font-style:normal;font-weight:700;font-display:swap;src:url('https://t1.kakaocdn.net/kakaocorp/kakaocorp/service/fonts/KakaoSmall_Bold_OTF.woff2') format('woff2')}@font-face{font-family:'Salt Kakao Big';font-style:normal;font-weight:400;font-display:swap;src:url('https://t1.kakaocdn.net/kakaocorp/kakaocorp/service/fonts/KakaoBig-Regular-v1.0.woff2') format('woff2')}@font-face{font-family:'Salt Kakao Big';font-style:normal;font-weight:700;font-display:swap;src:url('https://t1.kakaocdn.net/kakaocorp/kakaocorp/service/fonts/KakaoBig-Bold-v1.0.woff2') format('woff2')}
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22px}.hero{position:relative;isolation:isolate;min-height:640px;height:min(760px,76vh);display:flex;align-items:center;background:#edf8fc}.hero-image{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center;z-index:-2}.hero:after{content:'';position:absolute;inset:0;z-index:-1;background:linear-gradient(90deg,rgba(244,251,254,.92) 0%,rgba(244,251,254,.78) 27%,rgba(244,251,254,.12) 58%,transparent 76%)}h1,h2,h3,p{margin-top:0}h1,h2{font-family:var(--serif);font-weight:700;letter-spacing:-1.7px}.hero h1{font-size:clamp(42px,4.8vw,72px);line-height:1.45;margin:0 0 28px;max-width:700px}.hero p:not(.eyebrow){font-size:18px;line-height:1.9;margin-bottom:32px}.hero .copy{max-width:680px}.actions{display:flex;align-items:center;gap:28px;flex-wrap:wrap}.button{display:inline-block;background:var(--ink);color:#fff;padding:14px 26px;border:1px solid var(--ink);font-size:15px;transition:background 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.lead{font-size:20px;max-width:780px;color:var(--muted);line-height:2}.detail-intro{padding-bottom:55px;border-bottom:1px solid var(--line);margin-bottom:55px}.detail-section{display:grid;grid-template-columns:260px 1fr;gap:60px;margin:0 0 65px}.detail-section h2{font-size:25px;line-height:1.6}.detail-section p{color:var(--muted);max-width:720px}.detail-section h3{font-size:18px;font-weight:500;margin:25px 0 10px}.detail-section ul{padding-left:20px;color:var(--muted)}.detail-section li{margin:10px 0}.quote{border-left:2px solid #a3b9c2;padding:15px 0 15px 28px;font:25px/1.9 var(--serif);margin:0}.facts{display:grid;grid-template-columns:1fr 1fr;gap:0 30px}.fact{border-bottom:1px solid var(--line);padding:22px 0}.fact strong{display:block;font-weight:500;margin-bottom:8px}.fact p{margin-bottom:0;font-size:15px}.cta{background:var(--blue);padding:32px 38px;display:flex;justify-content:space-between;align-items:center;gap:25px;margin-top:65px}.cta p{margin:0}.faq 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.shell{gap:15px}.nav{gap:19px}.header-actions{gap:10px}.wordmark{font-size:21px}.standard{gap:45px}.entries{gap:30px}.book-highlight{gap:50px;padding:55px 45px}.detail{width:calc(100% - 80px)}}@media(max-width:760px){.shell{width:calc(100% - 40px)}.header{height:78px}.header .shell{gap:10px}.header .wordmark{font-size:18px;letter-spacing:1px}.header .wordmark small{font-size:10px}.header-actions .outline{display:none}.menu{display:block;font-size:14px}.nav{display:none;position:absolute;left:0;right:0;top:78px;background:white;z-index:5;padding:25px;box-shadow:0 12px 20px #143b4710;flex-direction:column;gap:20px}.nav.is-open{display:flex}.hero{height:640px;min-height:0;align-items:flex-start;padding-top:55px}.hero-image{object-position:65% center}.hero:after{background:linear-gradient(180deg,rgba(244,251,254,.97),rgba(244,251,254,.85) 40%,rgba(244,251,254,.05) 76%)}.hero h1{font-size:40px;line-height:1.5;margin-bottom:20px;letter-spacing:-1px}.hero 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50px}.breadcrumb{margin-bottom:28px}.detail h1{font-size:34px;letter-spacing:-1px}.detail .lead{font-size:17px}.detail-intro{padding-bottom:30px;margin-bottom:35px}.detail-section{grid-template-columns:1fr;gap:8px;margin-bottom:38px}.detail-section h2{font-size:23px;margin-bottom:14px}.facts{grid-template-columns:1fr}.cta{flex-direction:column;align-items:flex-start;padding:25px;margin-top:38px}.quote{font-size:22px}.contact-line a{font-size:19px}.related{gap:22px}.footer-bottom{gap:20px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}

/* Approved editorial composition: single hero, unboxed text, small book image. */
.brand-logo{display:block;position:relative;width:160px;height:84px;overflow:hidden;flex-shrink:0;background:#fff}.brand-logo img{position:absolute;width:260px;height:260px;max-width:none;left:-53px;top:-84px;object-fit:contain}.header{height:88px}.hero{height:auto;min-height:0;aspect-ratio:2.32/1}.hero .copy{max-width:700px}.hero h1{font-size:clamp(40px,4.6vw,66px);line-height:1.4;letter-spacing:-1.5px}.hero-image{object-position:center}.hero:after{background:linear-gradient(90deg,rgba(244,251,254,.55) 0%,rgba(244,251,254,.32) 28%,transparent 53%)}.standard{grid-template-columns:1.65fr 1fr;gap:55px;padding:78px 0 66px}.standard h2{font-size:clamp(26px,2.55vw,38px);line-height:1.65;letter-spacing:-1.5px}.standard p{font-size:16px}.explore{padding:52px 0 72px}.entries{gap:72px}.entry h2{font-size:31px;line-height:1.5;font-weight:700}.book-highlight{grid-template-columns:300px 1fr;gap:75px;background:#fff;padding:15px 15px 22px;margin-bottom:25px}.book-visual{width:300px;height:345px}.book-visual img{width:100%;height:100%;object-fit:contain;display:block}.book-highlight h2{font-size:36px;line-height:1.5}.book-highlight p:not(.eyebrow){margin-bottom:22px}.book-highlight .eyebrow{margin-bottom:22px}.footer{padding-top:10px}.footer-top{padding-bottom:20px}.footer .brand-logo{width:137px;height:72px}.footer .brand-logo img{width:224px;height:224px;left:-46px;top:-72px}.footer-tagline{margin-top:0}.footer-bottom{font-family:var(--sans)}.book-visual img{mix-blend-mode:multiply}
@media(max-width:1100px){.standard{grid-template-columns:1.3fr 1fr;gap:35px}.standard h2{font-size:29px}.entries{gap:40px}.book-highlight{grid-template-columns:260px 1fr;gap:45px}.book-visual{width:260px;height:310px}}
@media(max-width:760px){.header{height:78px}.header .brand-logo{width:125px;height:69px}.header .brand-logo img{width:205px;height:205px;left:-42px;top:-66px}.hero{aspect-ratio:auto;height:590px;padding-top:45px}.hero h1{font-size:40px}.hero-image{object-position:65% center}.hero:after{background:linear-gradient(180deg,rgba(244,251,254,.91),rgba(244,251,254,.65) 38%,transparent 72%)}.standard{grid-template-columns:1fr;gap:28px;padding:50px 0 32px}.standard h2{font-size:26px;line-height:1.6;letter-spacing:-1px}.standard p{font-size:15px}.explore{padding:30px 0 38px}.entries{gap:30px}.entry h2{font-size:26px}.book-highlight{grid-template-columns:110px 1fr;gap:22px;padding:20px 0 25px;margin-bottom:15px}.book-visual{width:110px;height:200px}.book-highlight h2{font-size:24px;letter-spacing:-1px}.book-highlight .eyebrow{font-size:10px;margin-bottom:14px}.book-highlight p:not(.eyebrow){font-size:14px}.book-highlight .actions{gap:12px}.book-highlight .text-link{font-size:13px}.footer{padding-top:15px}.footer-top{gap:18px}.footer .brand-logo{width:125px;height:65px}.footer .brand-logo img{width:205px;height:205px;left:-42px;top:-66px}}

.brand-logo{height:92px}.brand-logo img{top:-82px}.header{height:96px}.footer .brand-logo{height:78px}.footer .brand-logo img{top:-72px}@media(max-width:760px){.header{height:78px}.header .brand-logo{height:73px}.footer .brand-logo{height:73px}}

/* White editorial surfaces, denser reading rhythm, and the supplied collection. */
body,.detail,.standard,.explore,.science,.collection,.cta,.footer{background:#fff}.brand-logo img{mix-blend-mode:multiply;filter:contrast(1.08)}.standard{padding:48px 0 36px;gap:40px}.standard h2{line-height:1.45}.explore{padding:34px 0 40px}.entries{gap:40px}.entry p{min-height:0}.collection{padding:16px 0 24px}.collection>img{display:block;width:100%;height:auto;aspect-ratio:616/228;object-fit:contain;border:1px solid #edf1f1}.collection-caption{display:flex;justify-content:space-between;align-items:center;gap:24px;margin-top:18px}.collection-caption h2{font-size:24px;line-height:1.4;margin:0}.collection-caption .actions{margin:0}.collection .reading-note{font-size:12px;margin:10px 0 0;color:#667780}.science{padding:30px 0 32px;border-top:1px solid #dce6e8;border-bottom:1px solid #dce6e8}.section-heading{display:flex;justify-content:space-between;align-items:center;gap:24px;margin-bottom:24px}.section-heading h2{font-size:32px;line-height:1.4;margin:0}.section-heading .eyebrow{margin-bottom:10px}.science-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:30px}.science-grid article{padding:0 22px 0 0;border-right:1px solid #e3eaec}.science-grid article:last-child{border-right:0;padding-right:0}.science-grid h3{font-size:21px;line-height:1.5;margin:8px 0 12px}.science-grid p{font-size:15px;line-height:1.9;margin:0;color:#536871}.science-foot{display:flex;justify-content:space-between;gap:20px;align-items:center;margin-top:24px;padding-top:18px;border-top:1px solid #edf1f2}.science-foot p{margin:0;font-size:14px}.science-foot .text-link{font-size:14px}.book-highlight{padding-top:25px;gap:48px}.book-visual{height:285px;width:240px}.book-highlight{grid-template-columns:240px 1fr}.detail{padding-top:44px;padding-bottom:55px}.detail-intro{padding-bottom:24px;margin-bottom:32px}.detail-section{margin-bottom:38px;gap:32px}.detail-section p{line-height:1.95}.detail-collection{margin-bottom:28px;padding-top:0}.detail-collection .collection-caption h2{font-size:22px}.knowledge-list details{border-top:1px solid #dce6e8;padding:17px 0}.knowledge-list details:last-child{border-bottom:1px solid #dce6e8}.knowledge-list summary{cursor:pointer;font-weight:700;line-height:1.6}.knowledge-list p{margin:12px 0 0;color:#526771}.source-list{padding:22px 0;border-top:1px solid #dce6e8;margin:28px 0}.source-list h3{font-size:19px;margin:0 0 14px}.source-list ul{padding-left:20px;margin:0;display:grid;grid-template-columns:1fr 1fr;gap:10px 28px}.source-list li{font-size:13px;line-height:1.65}.source-list a{text-decoration:underline;text-underline-offset:3px}.source-list .reading-note{font-size:12px;line-height:1.8;margin-top:16px;color:#667780}.table-scroll{overflow-x:auto}table{border-collapse:collapse;width:100%;font-size:14px;margin:20px 0}th,td{text-align:left;padding:15px 18px;border-bottom:1px solid #dce6e8;line-height:1.7}thead{border-top:2px solid #244b57}thead th{font-weight:700}tbody th{white-space:nowrap}.cta{border:1px solid #dce6e8;margin-top:28px;padding:25px 30px}
@media(max-width:760px){.standard{padding:32px 0 24px;gap:16px}.collection{padding:12px 0 22px}.collection-caption{align-items:flex-start;flex-direction:column;gap:12px;margin-top:14px}.collection-caption h2{font-size:20px}.collection-caption .actions{gap:20px}.collection .reading-note{font-size:11px}.science{padding:26px 0}.section-heading{flex-direction:column;align-items:flex-start;gap:12px}.section-heading h2{font-size:25px}.science-grid{grid-template-columns:1fr;gap:20px}.science-grid article{border-right:0;border-bottom:1px solid #e3eaec;padding:0 0 20px}.science-grid article:last-child{border-bottom:0;padding:0}.science-grid h3{font-size:20px}.science-grid p{font-size:14px}.science-foot{flex-direction:column;align-items:flex-start;gap:12px}.explore{padding:28px 0}.entries{gap:24px}.book-highlight{grid-template-columns:100px 1fr;gap:20px}.book-visual{width:100px;height:170px}.book-highlight h2{font-size:22px}.detail{padding-top:32px}.detail-section{gap:10px;margin-bottom:28px}.source-list ul{grid-template-columns:1fr}.detail-collection{margin-bottom:20px}.cta{padding:22px}.collection>img{min-height:0}th,td{padding:12px 10px}.header-actions{gap:10px}}

/* Full-width high-resolution collection; live text and links. */
.collection-full{width:100%;max-width:none;padding:0;margin:0 0 26px}.collection-scene{position:relative;width:100%;background:#fff}.collection-scene>img{width:100%;height:auto;display:block;aspect-ratio:2048/683;object-fit:cover;border:0;opacity:1;filter:none}.collection-title{position:absolute;left:3.5%;top:7%;width:24%;color:#143b47}.collection-title .eyebrow{font-size:clamp(9px,.85vw,13px);margin:0 0 12px}.collection-title h2{font-size:clamp(22px,2.45vw,40px);line-height:1.4;margin:0;letter-spacing:-1px}.collection-links{position:absolute;right:0;bottom:0;width:32.5%;background:#fff;display:flex;justify-content:center;align-items:center;gap:28px;padding:18px 12px}.collection-links .text-link{font-size:14px;white-space:nowrap}.collection-full>.reading-note{padding:0 3.5%;margin:10px 0 0}.detail .collection-full{width:100vw;margin-left:calc(50% - 50vw)}
.header .brand-logo{width:168px;height:94px}.header .brand-logo img{width:250px;height:250px;left:-44px;top:-79px}.footer .brand-logo{width:145px;height:84px}.footer .brand-logo img{width:224px;height:224px;left:-39px;top:-70px}
@media(max-width:760px){.header .brand-logo,.footer .brand-logo{width:133px;height:75px}.header .brand-logo img,.footer .brand-logo img{width:200px;height:200px;left:-34px;top:-64px}.collection-title{position:static;width:auto;padding:18px 20px 10px}.collection-title .eyebrow{font-size:10px;margin-bottom:8px}.collection-title h2{font-size:23px}.collection-title h2 br{display:none}.collection-links{position:static;width:auto;padding:10px 20px 16px;justify-content:flex-start;gap:24px}.collection-full>.reading-note{padding:0 20px}.collection-full{margin-bottom:22px}}
.lecture-intro{display:grid;grid-template-columns:1.65fr 1fr;gap:50px;align-items:center;margin-bottom:30px}.lecture-intro h1{font-size:clamp(32px,3.5vw,48px);line-height:1.4;margin:12px 0 20px}.channel-panel{border-left:1px solid #dce6e8;padding:28px 0 28px 40px}.channel-mark{display:inline-flex;background:#c52d28;color:#fff;width:52px;height:36px;border-radius:9px;align-items:center;justify-content:center}.channel-panel h2{font-size:21px;margin:18px 0 8px}.channel-panel p{font-size:14px;color:#60757e}.lecture-jumps{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid #dce6e8;border-bottom:1px solid #dce6e8}.lecture-jumps a{padding:18px 14px;display:flex;gap:12px;font-size:14px;align-items:center}.lecture-jumps a>span:first-child{color:#72939d;font-size:12px}.lecture-jumps a:hover{background:#f4f8f9}.lecture-context{display:flex;justify-content:space-between;gap:26px;align-items:center;margin:22px 0 32px}.lecture-context p{font-size:13px;line-height:1.85;color:#657a83;margin:0;max-width:780px}.lecture-context .text-link{font-size:13px;white-space:nowrap}.lecture-section{scroll-margin-top:110px;margin:0 0 44px}.lecture-section-heading{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:24px}.lecture-section-heading .eyebrow{margin-bottom:9px}.lecture-section-heading h2{font-size:27px;margin:0;line-height:1.4}.lecture-section-heading>p{font-size:14px;line-height:1.8;color:#61767f;max-width:420px;margin:0}.lecture-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:22px}.lecture-card{min-width:0}.lecture-thumbnail{position:relative;display:block;overflow:hidden;background:#e9eff1;aspect-ratio:16/9}.lecture-thumbnail img{display:block;width:100%;height:100%;object-fit:cover;transition:transform .2s}.lecture-thumbnail:hover img{transform:scale(1.025)}.play-badge{position:absolute;right:10px;bottom:10px;border-radius:6px;background:rgba(14,37,47,.85);color:#fff;display:flex;align-items:center;justify-content:center;width:35px;height:27px;font-size:12px}.lecture-card-copy{padding:14px 0 0}.lecture-number{font-size:10px;letter-spacing:1.3px;color:#78919b;margin:0 0 10px}.lecture-card h3{font-size:17px;line-height:1.65;margin:0 0 10px}.lecture-card-copy>p:not(.lecture-number){font-size:13px;line-height:1.85;color:#657983;margin:0 0 14px}.lecture-card .text-link{font-size:12px}.lecture-science{scroll-margin-top:100px;border-top:1px solid #dce6e8;padding:30px 0 0}.lecture-science>h2{font-size:27px;margin:0 0 25px}.science-note-grid{display:grid;grid-template-columns:1fr 1fr;gap:26px 38px}.science-note-grid h3{font-size:18px;line-height:1.6;margin:0 0 10px}.science-note-grid p{font-size:14px;line-height:1.95;color:#5b717b;margin:0 0 12px}.science-note-grid .text-link{font-size:12px}.lecture-science .reading-note{font-size:12px;line-height:1.9;color:#7b8d94;margin-top:26px}.book-series-intro{max-width:850px;margin-bottom:30px}.book-series-intro h1{font-size:clamp(32px,3.6vw,50px);line-height:1.4}.book-series-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.book-series-grid .lecture-card{margin-bottom:16px}.book-series-grid .lecture-card h3{font-size:19px}.book-series-bar{display:flex;justify-content:space-between;align-items:center;gap:24px;padding:18px 0;border-top:1px solid #dce6e8;border-bottom:1px solid #dce6e8;margin-bottom:28px}.book-series-bar p{margin:0;font-size:14px}.nav{gap:24px}
@media(max-width:1050px){.lecture-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.lecture-intro{gap:30px}.channel-panel{padding-left:25px}.nav{gap:17px}.lecture-jumps a{padding:15px 8px;font-size:12px}}
@media(max-width:760px){.lecture-intro{grid-template-columns:1fr;gap:20px;margin-bottom:24px}.lecture-intro h1{font-size:34px}.channel-panel{border-left:0;border-top:1px solid #dce6e8;padding:20px 0 0}.channel-panel h2{margin:12px 0 5px}.lecture-jumps{grid-template-columns:1fr 1fr}.lecture-jumps a{font-size:12px;padding:14px 8px;gap:8px}.lecture-context{flex-direction:column;align-items:flex-start;gap:12px}.lecture-section-heading{flex-direction:column;align-items:flex-start;gap:10px;margin-bottom:18px}.lecture-section-heading h2{font-size:24px}.lecture-grid{gap:22px 14px}.lecture-card h3{font-size:15px}.lecture-card-copy>p:not(.lecture-number){font-size:12px}.science-note-grid{grid-template-columns:1fr;gap:24px}.book-series-bar{flex-direction:column;align-items:flex-start;gap:12px}.book-series-intro h1{font-size:32px}.book-series-grid .lecture-card h3{font-size:16px}.lecture-section{margin-bottom:32px}}
@media(max-width:400px){.lecture-grid{grid-template-columns:1fr}.lecture-card h3{font-size:18px}}
.lecture-topics{font-size:11px!important;color:#315966!important;border-top:1px solid #e4ecee;padding-top:10px}.book-series-grid .lecture-card:last-child{grid-column:1/-1;display:grid;grid-template-columns:1fr 1fr;gap:32px;border-top:1px solid #dce6e8;padding-top:26px}.book-series-grid .lecture-card:last-child .lecture-card-copy{padding-top:8px}.book-series-intro>h2{font-size:24px;margin:20px 0}.book-series-grid{margin-bottom:30px}@media(max-width:760px){.book-series-grid .lecture-card:last-child{grid-template-columns:1fr;gap:10px}.book-series-intro>h2{font-size:21px}}

.hero-video{object-fit:cover}.hero-video-toggle{position:absolute;z-index:3;right:28px;bottom:24px;width:38px;height:38px;border:1px solid rgba(255,255,255,.8);border-radius:50%;background:rgba(20,59,71,.65);color:#fff;cursor:pointer;font-size:17px}.hero-video-toggle:focus-visible{outline:3px solid #143b47;outline-offset:4px}@media(max-width:760px){.hero-video-toggle{right:20px;bottom:20px}}

.lecture-player{width:min(960px,calc(100vw - 32px));max-width:none;max-height:calc(100dvh - 32px);padding:0;border:0;border-radius:14px;background:#fff;color:#143b47;box-shadow:0 24px 100px #0005;overflow:auto}
.lecture-player::backdrop{background:rgba(8,24,30,.78)}
.lecture-player-heading{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:16px 22px}
.lecture-player-heading h2{font-family:inherit;font-size:17px;font-weight:600;line-height:1.5;margin:0}
.lecture-player-close{flex:0 0 36px;width:36px;height:36px;border:0;border-radius:50%;background:#eef3f4;color:#143b47;font-size:28px;line-height:1;cursor:pointer}
.lecture-player-close:focus-visible{outline:2px solid #14758b;outline-offset:3px}
.lecture-player-screen{aspect-ratio:16/9;min-height:200px;background:#000}
.lecture-player-screen iframe{display:block;width:100%;height:100%;min-height:200px;border:0}
@media(max-width:600px){.lecture-player-heading{padding:12px 14px;gap:12px}.lecture-player-heading h2{font-size:14px}.lecture-player{border-radius:10px}}

.platform-button{display:inline-flex;align-items:center;justify-content:center;white-space:nowrap;background:#143b47;color:#fff;padding:11px 17px;border-radius:5px;font-size:14px;font-weight:600;text-decoration:none}.platform-button:hover{background:#236171}.header-actions{gap:14px}.brand-story-image{margin:0 0 52px}.brand-story-image img{display:block;width:100%;height:clamp(260px,38vw,460px);object-fit:cover;border-radius:12px}.brand-story-image figcaption{margin-top:14px;font-size:14px;color:#5b717b}.detail-section p+p{margin-top:20px}.brand-topic-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}.brand-topic-grid article{border-top:2px solid #143b47;padding-top:18px}.brand-topic-grid h3{font-size:19px;line-height:1.5}.brand-topic-grid p{font-size:16px;line-height:1.9}.founder-signature{font-weight:700;margin-top:28px!important}.brand-book-feature{display:grid;grid-template-columns:minmax(140px,220px) 1fr;gap:34px;align-items:center}.brand-book-feature>img{width:100%;max-height:330px;object-fit:contain}.brand-book-feature h3{font-size:24px}.brand-content-links{display:flex;gap:14px;flex-wrap:wrap;margin-top:24px}.lecture-player-screen{min-height:0}.lecture-player-screen iframe{min-height:0}.lecture-player{margin:auto}.lecture-player-screen{height:min(54vw,540px,70dvh);aspect-ratio:16/9}
@media(max-width:1100px){.header .shell{gap:15px}.nav{gap:14px}.platform-button{padding:10px 12px}.header-actions{gap:10px}}
@media(max-width:760px){.platform-button{padding:9px 10px;font-size:12px}.header-actions{gap:8px}.header-actions .outline{display:none}.brand-topic-grid{grid-template-columns:1fr}.brand-book-feature{grid-template-columns:1fr;gap:22px}.brand-book-feature>img{max-width:220px;margin:auto}.brand-story-image{margin-bottom:30px}.brand-content-links{gap:10px}.lecture-player-screen{height:auto;aspect-ratio:16/9}.header .shell{gap:8px}.brand-logo{flex-shrink:0}}

.salt-comparison-section{margin:0 0 64px}.salt-comparison-section>h2{font-size:30px;margin-bottom:16px}.salt-comparison-section>p{max-width:900px;color:#59707a}.salt-chart{margin:30px 0;padding:28px;border:1px solid #dce5e8;border-radius:12px;background:#fff}.salt-chart h3{font-size:22px;line-height:1.6;margin-bottom:20px}.chart-scroll{overflow-x:auto}.chart-scroll svg{display:block;width:100%;min-width:660px;font-family:inherit;color:#143b47}.chart-scroll text{fill:currentColor}.salt-chart figcaption{font-size:14px;color:#59707a;line-height:1.9;margin-top:20px}.salt-chart details{margin-top:18px}.salt-chart summary{cursor:pointer;font-size:14px;font-weight:600;padding:10px 0}.salt-chart rect:focus{outline:2px solid #143b47}.chart-source{font-size:14px;text-decoration:underline}.salt-chart table{font-size:14px;width:100%}.salt-chart td{text-align:right}
@media(max-width:760px){.salt-chart{padding:18px 14px;margin:24px 0}.salt-chart h3{font-size:19px}.salt-comparison-section>h2{font-size:25px}.chart-scroll svg{min-width:650px}.mineral-chart svg{min-width:620px}}

/* Keep a decoded poster behind the video during startup and buffering. */
.hero .hero-poster{z-index:-3;display:block}
.hero .hero-video{opacity:0;display:block;transition:none}
.hero.video-ready .hero-video{opacity:1}