/* Invitations to read: the homepage is a shelf; /learn/ holds the full index. */
.bluegreen-home .site-header,.bluegreen-home .site-header.is-scrolled{background:#061522}
.bluegreen-home .primary-nav{gap:clamp(17px,2vw,30px)}
.primary-nav>a[aria-current="page"]:after{transform:scaleX(1)}
.hero-heading .eyebrow{font-size:.75rem;flex-wrap:wrap;row-gap:8px}
.hero-edition{font-size:.75rem}
.hero-bottom,.hero-coordinate,.hero-index,.scroll-cue{font-size:.75rem}
.hero-about{font-size:.875rem;font-weight:600;text-decoration:underline;text-underline-offset:7px;text-decoration-color:#8dbcb4}
.hero-image-note{margin:0;padding:13px var(--gutter);background:#061522;color:#bcd3d1;font-size:.75rem;line-height:1.8}
.eyebrow,.material-caption>.eyebrow,.director .eyebrow,.step-label,.course-name .course-en,.module-label{font-size:.75rem}
.material-landscape figcaption{font-size:.75rem;line-height:1.8}
.credentials{font-size:.875rem;line-height:1.8}
.director>p{font-size:.9375rem}
.text-button,.course-brief,.course-no{font-size:.875rem}
.field-label,.field-b .field-label{left:12px;bottom:12px;padding:7px 10px;color:#f7f8f4;background:#102b35;font-size:.875rem;line-height:1.2;letter-spacing:.02em}
.experiment-presets{display:flex;flex-wrap:wrap;gap:10px;margin-top:19px}
.experiment-presets button{min-height:46px;padding:10px 15px;border:1px solid #789e97;background:transparent;color:#e3f2ec;font-size:.875rem;font-weight:600;line-height:1.5;transition:background .2s,color .2s}
.experiment-presets button:hover,.experiment-presets button[aria-pressed="true"]{background:#a5e2d0;border-color:#a5e2d0;color:#102b35}
.subject-open{display:grid;grid-template-columns:1fr 28px;gap:5px 20px;width:100%;min-height:78px;padding:13px 0;border-block:1px solid #829f91;color:#184b40;font-size:1rem;line-height:1.6}
.subject-open strong{font-size:1rem;font-weight:650}
.subject-open small{grid-column:1;font-size:.8125rem;font-weight:500;color:#526c5f}
.disclosure-mark{position:relative;display:block;width:26px;height:26px;flex-shrink:0}
.disclosure-mark:before,.disclosure-mark:after{content:"";position:absolute;top:12px;left:4px;width:18px;height:1px;background:currentColor}
.disclosure-mark:after{transform:rotate(90deg);transition:transform .2s}
.subject-open .disclosure-mark{grid-column:2;grid-row:1/3;align-self:center}
.subject-card:hover .subject-open,.subject-card:focus-visible .subject-open{border-color:#184b40;color:#184b40}
.subject-card:hover .subject-open strong{text-decoration:underline;text-underline-offset:5px}

/* A prominent, truthful entrance to the owner's real Naver reviews. */
.review-section{padding:12px 0 92px;background:var(--paper)}
.review-door{display:grid;grid-template-columns:minmax(0,1.45fr) minmax(0,1fr);color:#f4f4e9;background:#163c37;transition:background .25s}
.review-door-copy{display:flex;flex-direction:column;justify-content:space-between;gap:48px;padding:46px 48px 51px}
.review-kicker{font-size:.9375rem;font-weight:600;letter-spacing:.02em;color:#cce8db}
.review-door h2{font-family:var(--font-display);font-size:clamp(28px,3.4vw,47px);font-weight:600;line-height:1.55;letter-spacing:-.055em}
.review-door-action{display:flex;flex-direction:column;align-items:flex-start;justify-content:center;padding:43px 42px;background:#c4e1bf;color:#153c2d;transition:background .25s}
.review-platform{font-size:.8125rem;font-weight:750;letter-spacing:.04em}
.review-door-action>strong{font-size:clamp(25px,2.6vw,37px);line-height:1.5;letter-spacing:-.04em;font-weight:600;margin-top:19px}
.review-read{display:flex;align-items:center;justify-content:space-between;gap:25px;align-self:stretch;min-height:52px;margin-top:29px;border-bottom:1px solid #527756;font-size:1rem;font-weight:700}
.entry-mark{display:inline-block;width:32px;height:2px;background:currentColor;transition:width .25s;flex-shrink:0}
.review-door-action>small{font-size:.75rem;margin-top:12px;color:#385b3f}
.review-door:hover{background:#204d42}
.review-door:hover .review-door-action{background:#d5edce}
.review-door:hover .review-read,.review-door:focus-visible .review-read{text-decoration:underline;text-underline-offset:5px}
.review-door:hover .entry-mark,.library-entry:hover .entry-mark{width:44px}
.class-archive{border-bottom:1px solid #afbeae}
.class-archive>summary{display:flex;align-items:center;gap:24px;min-height:78px;padding:17px 4px;cursor:pointer;list-style:none;font-size:1rem;font-weight:600}
.class-archive>summary::-webkit-details-marker{display:none}
.class-archive>summary .archive-years{margin-left:auto;color:#56705c;font-size:.875rem;letter-spacing:.05em;font-weight:500}
.class-archive[open]>summary .disclosure-mark:after{transform:rotate(0)}
.class-archive .lab-archive{padding:28px 0 42px}

/* Typographic covers are live links, with readable titles and explicit actions. */
.learning-section{background:#fafbf7}
.reading-invitation{display:flex;align-items:flex-end;justify-content:space-between;gap:40px;margin-bottom:53px}
.reading-invitation h2{font-family:var(--font-display);font-weight:600;font-size:clamp(33px,4.3vw,60px);line-height:1.5;letter-spacing:-.06em}
.reading-invitation>p{max-width:340px;font-size:1rem;line-height:1.9;color:#536957}
.reading-shelf{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px}
.reading-volume{min-width:0;display:flex;flex-direction:column;--cover:#193d43;--cover-light:#c2dfd7;transition:transform .25s}
.volume-2{--cover:#294b79;--cover-light:#c7dcf1}
.volume-3{--cover:#525b35;--cover-light:#e1e6b9}
.volume-4{--cover:#674656;--cover-light:#edd2da}
.volume-cover{display:flex;flex-direction:column;position:relative;min-height:356px;padding:25px 25px 22px;border-left:5px solid var(--cover-light);background:var(--cover);color:#fffefa;transition:box-shadow .25s}
.volume-edition{font-size:.75rem;font-weight:600;letter-spacing:.09em;line-height:1.5;color:var(--cover-light)}
.volume-number{font-family:var(--font-display);font-size:54px;line-height:1.1;letter-spacing:-.065em;font-weight:600;margin-top:24px;color:var(--cover-light)}
.volume-cover h3{font-size:clamp(26px,2.6vw,36px);font-weight:600;line-height:1.45;letter-spacing:-.055em;margin:25px 0 20px}
.volume-topic{font-size:.8125rem;line-height:1.8;margin-top:auto;padding-bottom:14px}
.volume-colophon{display:block;border-top:1px solid #ffffff61;padding-top:13px;font-size:.75rem;line-height:1.6;color:var(--cover-light)}
.volume-question{font-size:1rem;line-height:1.75;letter-spacing:-.025em;font-weight:550;color:#244d40;margin-top:22px;margin-bottom:15px}
.volume-open{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-top:auto;min-height:46px;border-bottom:1px solid #87a08b;color:#204d38;font-size:.875rem;font-weight:650}
.volume-open-mark{width:24px;height:1px;background:currentColor;transition:width .25s}
.reading-volume:hover,.reading-volume:focus-visible{transform:translateY(-5px)}
.reading-volume:hover .volume-cover,.reading-volume:focus-visible .volume-cover{box-shadow:0 12px 0 -7px var(--cover-light)}
.reading-volume:hover .volume-open,.reading-volume:focus-visible .volume-open{text-decoration:underline;text-underline-offset:5px;border-color:#204d38}
.reading-volume:hover .volume-open-mark{width:36px}
.shelf-footer{display:flex;align-items:center;justify-content:space-between;gap:30px;margin-top:44px;padding-top:25px;border-top:1px solid #c4cec1}
.shelf-footer>p{font-size:.9375rem;color:#536957;line-height:1.8}
.library-entry{display:inline-flex;align-items:center;gap:28px;min-height:48px;color:#244d38;font-size:1rem;font-weight:650;border-bottom:1px solid #72947b;flex-shrink:0}

/* Column titles are the invitation: no repeated summaries or excerpt cards. */
.column-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:30px;margin-bottom:40px}
.column-heading h2{font-family:var(--font-display);font-size:clamp(34px,4.1vw,57px);font-weight:600;line-height:1.5}
.column-all{display:inline-flex;align-items:center;min-height:46px;border-bottom:1px solid #6e8e79;font-size:.9375rem;color:#244d38;font-weight:650;white-space:nowrap}
.column-titles{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));border-top:1px solid #869c86}
.column-title-link{display:grid;grid-template-columns:32px 1fr;gap:20px;padding:31px 32px 31px 0;min-height:152px;border-bottom:1px solid #b0c0ad;color:#244d38;transition:background .2s,color .2s}
.column-title-link:nth-child(even){padding-left:34px;border-left:1px solid #b0c0ad}
.column-order{font-size:.8125rem;line-height:2.6;letter-spacing:.05em;color:#5c715d}
.column-title-link h3{font-size:clamp(23px,2.4vw,33px);font-weight:550;line-height:1.6;letter-spacing:-.045em;align-self:center}
.column-title-link:hover,.column-title-link:focus-visible{background:#e5eadf;color:#153e2f}
.column-title-link:hover h3,.column-title-link:focus-visible h3{text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:6px}

/* A focused destination for all 27 chapter links, search and supporting resources. */
.library-page{background:#fafbf7}
.library-main{padding-top:155px;padding-bottom:90px}
.library-intro{display:grid;grid-template-columns:1.15fr 1fr;gap:17px 60px;align-items:end}
.library-intro>.eyebrow{grid-column:1/-1;color:#536957;font-size:.75rem}
.library-intro h1{grid-column:1;grid-row:2/4;font-family:var(--font-display);font-size:clamp(34px,3.8vw,51px);font-weight:600;line-height:1.5;letter-spacing:-.06em}
.library-intro>p:not(.eyebrow){grid-column:2;font-size:1rem;line-height:1.9;color:#536957}
.library-home{grid-column:2;justify-self:start;display:inline-flex;align-items:center;min-height:44px;border-bottom:1px solid #8a9e84;font-size:.875rem;font-weight:600;color:#31553d}
.library-page .learning-search{margin-top:43px}
.library-page .chapter-links a{min-height:48px}
.library-page .lesson-card h3 a,.library-page .lesson-actions a,.library-page .chapter-links a{transition:background .2s,color .2s}
.library-page .chapter-links a:hover,.library-page .chapter-links a:focus-visible{background:#e2ebde;color:#174735}
.library-page .no-results{padding:38px 0;font-size:1rem;line-height:1.9}
.reading-page .reading-header>a:last-child{font-size:.875rem;font-weight:600}
.reading-page .reading-title>p:first-child,.reading-page .reading-sidebar>p{font-size:.75rem}
.reading-page .reading-title>p:not(:first-child){font-size:.9375rem;line-height:1.9}
.reading-page .reading-sidebar nav a,.reading-page .reading-sidebar .reading-outline nav a,.reading-page .reading-outline summary{font-size:.875rem;min-height:46px}
.reading-page .print-button,.reading-page .reading-source{font-size:.8125rem;min-height:44px}

@media (max-width:1100px){
 .reading-shelf{gap:20px}.volume-cover{padding:22px 19px 20px;min-height:340px}.volume-cover h3{font-size:28px}.volume-edition{letter-spacing:.045em}
 .review-door-copy{padding:37px 34px 42px}.review-door-action{padding:36px 32px}
 .reading-invitation{gap:35px}.reading-invitation>p{max-width:300px}
}
@media (max-width:960px){
 .bluegreen-home .header-inner{height:78px}.bluegreen-home .site-header.is-scrolled .header-inner{height:72px}
 .bluegreen-home .menu-toggle{display:flex;align-items:center;gap:22px;min-width:68px;min-height:44px;border:0;background:transparent;color:#fffefa;font-size:.875rem;padding:0 0 0 10px}
 .bluegreen-home .primary-nav{display:none;position:absolute;top:78px;left:0;right:0;background:#091f2b;border-bottom:1px solid #ffffff26;padding:24px var(--gutter) 32px;color:#fffefa;box-shadow:0 24px 30px #00141b35}
 .bluegreen-home .primary-nav.is-open{display:grid;gap:6px}.bluegreen-home .primary-nav>a{font-size:1rem;min-height:51px}
 .bluegreen-home .primary-nav>a:after{display:none}.bluegreen-home .primary-nav .nav-contact{margin-left:0;margin-top:12px;padding-top:15px;border-top:1px solid #ffffff26}
 .bluegreen-home .site-header.is-scrolled .primary-nav{top:72px}
 .reading-shelf{grid-template-columns:repeat(2,minmax(0,1fr));gap:34px 24px}.volume-cover{min-height:340px;padding:25px 28px}.volume-cover h3{font-size:35px}.volume-number{font-size:50px}
 .reading-invitation{display:block}.reading-invitation>p{max-width:none;margin-top:24px}.shelf-footer{align-items:flex-start}.shelf-footer>p{max-width:290px}
 .review-door{grid-template-columns:1.2fr 1fr}.review-door-copy{padding:32px 26px}.review-door-action{padding:32px 26px}.review-door h2{font-size:30px}
 .library-intro{gap:20px 35px}.library-intro h1{font-size:36px}
}
@media (max-width:600px){
 .bluegreen-home .header-inner{height:72px}.bluegreen-home .primary-nav{top:72px}.hero-heading .eyebrow{font-size:.75rem;letter-spacing:.07em}.hero-edition{margin-left:8px}.hero-index{max-width:130px;line-height:1.6}.scroll-cue{font-size:.75rem}.hero-description{font-size:.9375rem}.hero-actions{gap:13px 20px}.hero-actions .button{font-size:.875rem}.hero-about{font-size:.875rem}.hero-image-note{padding-block:13px;font-size:.75rem}
 .material-caption{bottom:96px}.material-landscape figcaption{padding-inline:24px}.credentials{font-size:.875rem}.director>p{font-size:.9375rem}.experiment-presets{gap:9px}.experiment-presets button{flex:1 1 auto;font-size:.8125rem;padding-inline:12px}.experiment-hint{font-size:.8125rem;line-height:1.9}
 .subject-open{margin-top:20px;min-height:78px}.subject-open strong{font-size:1rem}.subject-open small{font-size:.8125rem}
 .review-section{padding:0 0 64px}.review-door{grid-template-columns:1fr}.review-door-copy{padding:29px 25px 32px;gap:29px}.review-kicker{font-size:.8125rem}.review-door h2{font-size:clamp(27px,7vw,36px);line-height:1.6}.review-door-action{padding:27px 25px 25px}.review-door-action>strong{font-size:25px;margin-top:14px}.review-read{margin-top:18px}.class-archive>summary{gap:13px;min-height:73px;font-size:.9375rem}.class-archive>summary .archive-years{font-size:.75rem}.class-archive .lab-archive{padding:21px 0 30px}
 .reading-invitation{margin-bottom:33px}.reading-invitation h2{font-size:34px;line-height:1.5}.reading-invitation>p{font-size:.9375rem;margin-top:22px;line-height:1.9}.reading-invitation>p br{display:none}
 .reading-shelf{gap:30px 16px}.volume-cover{min-height:284px;padding:18px 15px 16px;border-left-width:3px}.volume-edition{font-size:.75rem;letter-spacing:0;max-width:130px;line-height:1.55}.volume-number{font-size:38px;margin-top:18px}.volume-cover h3{font-size:clamp(21px,5.6vw,30px);margin:18px 0 17px;line-height:1.5}.volume-topic{font-size:.75rem;line-height:1.7;padding-bottom:12px;word-break:normal}.volume-colophon{font-size:.75rem;line-height:1.7;padding-top:10px}.volume-question{font-size:.9375rem;line-height:1.75;margin-top:17px;margin-bottom:13px}.volume-open{font-size:.8125rem;gap:8px;min-height:46px}.volume-open-mark{width:18px}
 .shelf-footer{display:block;margin-top:32px;padding-top:23px}.shelf-footer>p{max-width:none;font-size:.875rem}.library-entry{margin-top:14px;font-size:.9375rem;gap:22px}
 .column-heading{display:block;margin-bottom:25px}.column-heading h2{font-size:34px}.column-all{font-size:.875rem;margin-top:17px}.column-titles{grid-template-columns:1fr}.column-title-link,.column-title-link:nth-child(even){grid-template-columns:24px 1fr;gap:17px;min-height:114px;padding:24px 5px;border-left:0}.column-title-link h3{font-size:24px;line-height:1.65}.column-order{font-size:.75rem}
 .library-main{padding-top:110px;padding-bottom:65px}.library-intro{display:block}.library-intro h1{font-size:34px;margin-top:16px}.library-intro>p:not(.eyebrow){font-size:.9375rem;margin-top:20px}.library-home{margin-top:10px;font-size:.875rem}.library-page .learning-search{margin-top:30px}
 .reading-page .reading-header{gap:12px}.reading-page .reading-header>a:last-child{font-size:.8125rem}.reading-page .reading-sidebar nav a,.reading-page .reading-sidebar .reading-outline nav a{font-size:.875rem}
}
@media (max-width:360px){
 .volume-cover{padding-inline:12px;min-height:284px}.volume-cover h3{font-size:21px;letter-spacing:-.055em}.volume-question{font-size:.875rem}.volume-topic{max-width:110px}.volume-open-mark{width:15px}.reading-invitation h2,.column-heading h2,.library-intro h1{font-size:31px}.review-door-copy,.review-door-action{padding-inline:20px}.review-door h2{font-size:26px}.class-archive>summary{gap:10px}.column-title-link h3{font-size:22px}
}
@media (prefers-reduced-motion:reduce){
 .reading-volume,.volume-cover,.volume-open-mark,.review-door,.review-door-action,.entry-mark,.disclosure-mark:after,.experiment-presets button,.column-title-link{transition:none}.reading-volume:hover,.reading-volume:focus-visible{transform:none}
}
@media print{
 .hero-image-note,.experiment-presets,.library-page .site-header{display:none}.library-main{padding-top:20px}.reading-shelf{grid-template-columns:repeat(2,minmax(0,1fr))}.review-door,.volume-cover{color:#102b35;background:white;border:1px solid #777}.volume-cover>*{color:#102b35}.review-door-action{background:white}.reading-volume{break-inside:avoid}
}

/* Course decisions: equal disciplines, a shorter visual journey to the reviews. */
.classes .section-heading{margin-bottom:44px}
.subject-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:46px 40px}
.subject-card,.subject-card:nth-child(even){display:flex;flex-direction:column;align-items:stretch;gap:0;min-width:0}
.subject-image{aspect-ratio:1.9}
.subject-copy{display:flex;flex-direction:column;flex:1;padding:27px 0 0}
.subject-volume{position:absolute;right:0;top:25px;font-size:45px;line-height:1;color:#66806d;margin:0}
.subject-copy .course-en{font-size:.75rem;line-height:1.8;letter-spacing:.07em;padding-right:65px}
.subject-copy h3{font-size:clamp(29px,2.75vw,40px);line-height:1.45;margin-top:6px;padding-right:60px}
.subject-copy>p{font-size:1rem;margin-top:11px;line-height:1.8}
.course-choice{display:grid;gap:11px;margin-top:23px;padding-top:20px;border-top:1px solid #bdc8bb;font-size:.9375rem;line-height:1.75}
.course-choice>div{display:grid;grid-template-columns:92px 1fr;gap:12px;align-items:start}
.course-choice dt{font-size:.875rem;font-weight:600;color:#52695e;padding-top:2px}
.course-choice dd{color:#153c30;min-width:0}
.subject-bottom{border:0;margin-top:18px;padding-top:0;font-size:.8125rem}
.subject-open{margin-top:20px;padding-block:12px;min-height:72px}
.subject-open strong{font-size:.9375rem}.subject-open small{font-size:.875rem}
.visual-note{margin-top:23px}
.curriculum-toolbar{margin-top:50px}
.experiment-bridge{margin-top:25px;padding-top:21px;border-top:1px solid #78998c}
.experiment-bridge p{font-size:.9375rem;line-height:1.9;color:#d6e7e1}
.experiment-bridge a{display:inline-flex;align-items:center;min-height:48px;margin-top:12px;border-bottom:1px solid #a5e2d0;font-size:.875rem;font-weight:600;color:#a5e2d0}
.experiment-bridge a:hover{text-decoration:underline;text-underline-offset:5px}
.network-section .section-heading>h2{font-size:clamp(32px,3.4vw,48px)}
.network-section>.section{padding-block:90px}
.universe-intro{padding-block:42px 48px}
.universe-statement>h3{font-size:clamp(29px,3vw,39px);margin-top:15px}
.universe-statement>p:last-child{margin-top:18px}
.universe-system{gap:20px}
.network-card{padding-block:28px}

/* Keep navigation and focus usable when zoomed, with large text or a short screen. */
.site-header{--header-size:92px}.site-header.is-scrolled{--header-size:72px}
.volume-open,.library-home,.column-all{font-size:.875rem}
.library-page .chapter-links a{font-size:1rem;min-height:48px}
.bluegreen-home .menu-toggle{flex-shrink:0}
.course>summary{scroll-margin-block:115px 28px}
.bluegreen-home a,.bluegreen-home button,.bluegreen-home summary{scroll-margin-block:115px 28px}
.bluegreen-home :where(a,button,input,summary):focus-visible{outline:3px solid #b76927;outline-offset:5px;box-shadow:0 0 0 2px #fffefa}
.bluegreen-home main:focus,.bluegreen-home section[tabindex="-1"]:focus{outline:none}
.primary-nav>a[aria-current="page"]{text-decoration:underline;text-underline-offset:6px}
@media(max-width:960px){.site-header{--header-size:78px}.bluegreen-home .primary-nav{max-height:calc(100vh - var(--header-size));max-height:calc(100dvh - var(--header-size));overflow-y:auto;overscroll-behavior:contain}}
@media(max-width:780px){
 .subject-grid{column-gap:27px;row-gap:36px}.subject-image{aspect-ratio:1.55}.subject-copy h3{font-size:28px;padding-right:0}.subject-copy .course-en{padding-right:43px;letter-spacing:.03em}.subject-volume{font-size:34px;top:28px}.course-choice>div{grid-template-columns:1fr;gap:2px}.course-choice{gap:12px}.subject-open{column-gap:12px}.subject-open strong{font-size:.875rem}
 .network-section>.section{padding-block:70px}
}
@media(max-width:600px){
 .site-header{--header-size:72px}.subject-grid{grid-template-columns:1fr;gap:38px}.subject-image{aspect-ratio:2.05}.subject-copy{padding-top:22px}.subject-copy h3{font-size:31px;padding-right:46px}.subject-volume{top:24px;font-size:38px}.subject-copy>p{font-size:1rem}.course-choice{font-size:.9375rem;margin-top:19px;padding-top:18px;gap:10px}.course-choice>div{grid-template-columns:89px 1fr;gap:13px}.course-choice dt{font-size:.875rem}.subject-bottom{margin-top:17px}.subject-open strong{font-size:1rem}.subject-open small{font-size:.875rem}.subject-image>span{font-size:.75rem;padding:6px 10px;left:13px;bottom:13px}
 .experiment-bridge p{font-size:1rem}.experiment-bridge a{font-size:.875rem}.network-section .section-heading>h2{font-size:34px}.universe-intro{padding-block:35px 40px;gap:28px}.universe-statement>h3{font-size:31px}.universe-system{gap:19px;padding-block:0}.network-card{padding-block:26px}.branch-identity h3{font-size:28px}
}
@media(max-width:360px){.course-choice>div{grid-template-columns:81px 1fr;gap:10px}.subject-copy h3{font-size:29px}.subject-copy>p{font-size:.9375rem}.subject-open strong{font-size:.9375rem}.reading-volume .volume-cover{padding-inline:12px}}
@media(max-height:560px) and (max-width:960px){
 .bluegreen-home .primary-nav{padding-block:12px 18px}.bluegreen-home .primary-nav>a{min-height:45px}.bluegreen-home .primary-nav .nav-contact{margin-top:4px;padding-top:8px}
 .hero{min-height:800px}
}
@media(prefers-reduced-motion:reduce){.subject-card:hover .subject-image img,.subject-card:focus-visible .subject-image img{transform:none}}
@media(forced-colors:active){
 .review-door,.volume-cover,.subject-open,.experiment-presets button{border:1px solid CanvasText}.perception-pair{forced-color-adjust:none}.bluegreen-home :where(a,button,input,summary):focus-visible{outline-color:Highlight;box-shadow:none}
}
@media print{.subject-grid{display:block}.subject-card{break-inside:avoid;margin-bottom:30px}.experiment-bridge{display:none}.network-section>.section{padding-block:28px}}

/* The worktable as one editorial composition: a main plate and a smaller detail. */
.practice-notes{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1.3fr) minmax(0,.78fr);align-items:center;gap:32px;margin-top:60px;padding:42px;background:#102b35;color:#f2f2e9;scroll-margin-top:110px}
.practice-intro{min-width:0;align-self:start;padding-top:16px}
.practice-intro>.eyebrow{font-size:.75rem;letter-spacing:.12em;color:#b0d0c9}
.practice-intro h3{font-family:var(--font-display);font-weight:600;font-size:clamp(25px,2.35vw,34px);line-height:1.7;letter-spacing:-.055em;margin-top:24px;text-wrap:balance}
.practice-intro>p:not(.eyebrow){font-size:1rem;line-height:1.95;color:#c3d3cd;margin-top:24px;word-break:keep-all;overflow-wrap:anywhere}
.practice-reading{display:inline-flex;align-items:center;min-height:48px;margin-top:28px;padding-bottom:5px;border-bottom:1px solid #87b6a8;color:#c3eddf;font-size:.875rem;font-weight:650;line-height:1.7}
.practice-reading:hover{text-decoration:underline;text-underline-offset:5px}
.practice-source{display:block;color:#a6beb7;font-size:.75rem;line-height:1.8;margin-top:20px;word-break:keep-all}
.practice-frame{min-width:0;margin:0}
.practice-frame img{display:block;width:100%;height:auto;aspect-ratio:3/4;object-fit:contain;background:#344f54}
.practice-frame figcaption{margin-top:17px;padding-top:13px;border-top:1px solid #637e7b;display:grid;gap:7px}
.practice-frame figcaption>span{font-size:.75rem;letter-spacing:.06em;color:#b0d0c9}
.practice-frame figcaption p{font-size:.875rem;font-weight:500;line-height:1.8;color:#e0e8df;word-break:keep-all}
.practice-sequence{align-self:end;margin-bottom:24px}
@media(max-width:1100px){.practice-notes{grid-template-columns:minmax(0,1fr) minmax(0,1.25fr) minmax(0,.78fr);gap:24px;padding:30px}.practice-intro{padding-top:0}.practice-intro h3{font-size:27px}.practice-intro>p:not(.eyebrow) br{display:none}}
@media(max-width:960px){.practice-notes{grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);gap:30px}.practice-intro{grid-column:1/-1;display:grid;grid-template-columns:1fr 1fr;column-gap:38px;align-items:start}.practice-intro>.eyebrow{grid-column:1/-1}.practice-intro h3{grid-column:1;grid-row:2/5;font-size:32px;margin-top:18px}.practice-intro>p:not(.eyebrow){grid-column:2;margin-top:18px}.practice-reading{grid-column:2;justify-self:start;margin-top:10px}.practice-source{grid-column:2;margin-top:12px}.practice-main{max-width:420px}.practice-sequence{max-width:260px;margin-bottom:22px}}
@media(max-width:600px){.practice-notes{grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);margin-top:38px;padding:27px 20px 24px;gap:25px 16px}.practice-intro{display:block}.practice-intro h3{font-size:29px;line-height:1.65;margin-top:17px}.practice-intro>p:not(.eyebrow){font-size:1rem;margin-top:17px;max-width:29em}.practice-reading{margin-top:16px}.practice-source{margin-top:14px}.practice-sequence{margin-bottom:14px}.practice-frame figcaption{margin-top:13px;padding-top:10px;gap:6px}.practice-frame figcaption p{font-size:.875rem;line-height:1.75}.practice-frame figcaption>span{font-size:.75rem}}
@media(max-width:360px){.practice-notes{padding-inline:16px;gap:24px 12px}.practice-intro h3{font-size:26px}.practice-frame figcaption p{font-size:.8125rem}}

/* Quieter column typography, a clear reading action, and a coherent review entrance. */
.journal{padding-block:100px}
.column-heading{margin-bottom:34px}
.column-titles{grid-template-columns:1fr}
.column-title-link,.column-title-link:nth-child(even){grid-template-columns:36px minmax(0,1fr) 48px;align-items:center;gap:26px;min-height:102px;padding:23px 20px 23px 0;border-left:0}
.column-title-link h3{font-size:clamp(22px,2.15vw,30px);font-weight:500;line-height:1.65;letter-spacing:-.035em;text-wrap:pretty}
.column-order{font-size:.8125rem;line-height:1.6;font-variant-numeric:tabular-nums;color:#53695b}
.column-read-label{justify-self:end;display:inline-flex;align-items:center;min-height:44px;font-size:.875rem;font-weight:600;text-decoration:underline;text-underline-offset:6px;text-decoration-color:#6e8e79}
.column-title-link:hover,.column-title-link:focus-visible{background:#e1e8df}
.review-door{background:#10323b}
.review-door-copy{border-top:3px solid #73b3a6}
.review-door-action{background:#c6dfd7;color:#123d37}
.review-door-action>small{color:#365c50}
.review-door:hover,.review-door:focus-visible{background:#17434a}
.review-door:hover .review-door-action,.review-door:focus-visible .review-door-action{background:#d5ebe3}
.review-read{border-bottom-color:#557e6d}
.bluegreen-home .primary-nav>a[aria-current="location"]{color:#a5e2d0}
.director-profile{font-size:.875rem}
.director h3 small{font-size:.875rem;line-height:1.7}
@media(max-width:960px){.bluegreen-home .primary-nav>a[aria-current="location"]{text-decoration:underline;text-underline-offset:7px;text-decoration-thickness:1px}.journal{padding-block:80px}}
@media(max-width:600px){.journal{padding-block:70px}.column-heading{margin-bottom:26px}.column-title-link,.column-title-link:nth-child(even){grid-template-columns:22px minmax(0,1fr) 29px;gap:12px;padding:22px 0;min-height:106px}.column-title-link h3{font-size:21px;line-height:1.7}.column-order{font-size:.75rem}.column-read-label{font-size:.875rem}}
@media(forced-colors:active){.practice-notes{border:1px solid CanvasText}.practice-reading,.column-read-label{color:LinkText}.bluegreen-home .primary-nav>a[aria-current="location"]{color:LinkText}}
@media print{.practice-notes{break-inside:avoid;margin-top:25px;padding:20px;color:#102b35;background:white;border:1px solid #777}.practice-intro>.eyebrow,.practice-intro>p:not(.eyebrow),.practice-source,.practice-frame figcaption>span,.practice-frame figcaption p,.practice-reading{color:#102b35}.practice-sequence{margin:0}.column-read-label{display:none}.column-title-link,.column-title-link:nth-child(even){grid-template-columns:36px 1fr}.review-door{color:#102b35;background:white}.review-door-action{background:white}}

/* People and professional credits: source-based introductions, no public lesson cases. */
.educators{margin-top:62px;padding-top:42px;border-top:1px solid #8eaaa0;scroll-margin-top:110px}
.educators-heading{display:grid;grid-template-columns:1fr 1fr;align-items:end;gap:35px;margin-bottom:32px}
.educators-heading .eyebrow{color:#42685e;font-size:.75rem;letter-spacing:.1em}
.educators-heading h3{font-family:var(--font-display);font-size:clamp(28px,2.8vw,39px);font-weight:600;line-height:1.65;margin-top:16px;letter-spacing:-.055em}
.educators-heading>p{font-size:1rem;line-height:1.9;color:#4b665e;max-width:450px}
.educator-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0;border-block:1px solid #8eaaa0}
.educator{display:flex;flex-direction:column;min-width:0;padding:29px 28px 27px;scroll-margin-top:118px}
.educator+.educator{border-left:1px solid #b4c3b9}
.educator-director{background:#123d3d;color:#f4f4e9}
.educator-top{display:flex;align-items:center;justify-content:space-between;gap:12px;color:#446b62;font-size:.875rem;font-weight:600}
.educator-index{font-size:.75rem;font-weight:500;letter-spacing:.08em}
.educator h4{font-size:42px;line-height:1.3;letter-spacing:-.05em;font-weight:550;margin-top:25px}
.educator-role{font-size:.875rem;font-weight:550;line-height:1.8;margin-top:9px;color:#426459}
.educator-description{font-size:1rem;line-height:1.9;margin-top:22px;color:#4b625a}
.educator-work-label{font-size:.75rem;letter-spacing:.03em;font-weight:650;color:#496b61;margin-top:26px;padding-bottom:10px;border-bottom:1px solid #afc1b5}
.educator-works{margin:0}
.educator-works li{padding:11px 0;border-bottom:1px solid #c7d1c6;display:grid;gap:2px}
.educator-works strong{font-size:.9375rem;line-height:1.75;font-weight:600}
.educator-works span{font-size:.8125rem;line-height:1.7;color:#50695e}
.educator-credentials{display:grid;gap:10px;font-size:.9375rem;line-height:1.8;margin-top:25px}
.educator-specialty{font-size:1rem;line-height:1.95;margin-top:14px}
.educator-more{margin-top:8px}
.educator-more>summary{list-style:none;display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:52px;font-size:.875rem;line-height:1.7;font-weight:600;cursor:pointer}
.educator-more>summary::-webkit-details-marker{display:none}.educator-more>summary::marker{content:""}
.educator-more[open]>summary .disclosure-mark:after{transform:rotate(0)}
.educator-more .educator-credentials{padding:10px 0 18px;margin:0}
.educator-links{display:flex;flex-direction:column;align-items:flex-start;gap:9px;margin-top:auto;padding-top:28px}
.educator-links a{display:inline-flex;align-items:center;min-height:44px;font-size:.875rem;line-height:1.8;border-bottom:1px solid #769b88;color:#224b3b;font-weight:600}
.educator-links a:hover,.teacher-profile-link:hover{text-decoration:underline;text-underline-offset:5px}
.educator-director .educator-top,.educator-director .educator-role,.educator-director .educator-work-label{color:#b9d8ca}
.educator-director .educator-description{color:#dfebe1}
.educator-director .educator-work-label{border-color:#618780}
.educator-director .educator-links a{color:#d0efe0;border-color:#8cb4a3}
.educators-inquiry{display:flex;justify-content:space-between;align-items:center;gap:35px;padding-top:26px}
.educators-inquiry p{font-size:1rem;line-height:1.9;font-weight:550}
.educators-inquiry p>span{color:#53685f;font-size:.9375rem;font-weight:400}
.educators-inquiry>a{display:inline-flex;align-items:center;min-height:48px;font-size:1rem;font-weight:600;line-height:1.8;border-bottom:1px solid #769b88}
.teacher-profile-link{display:inline-flex;align-items:center;min-height:44px;font-size:.875rem;font-weight:600;border-bottom:1px solid #769b88;margin-top:1px}
@media(max-width:1100px){.educator{padding-inline:22px}.educator h4{font-size:37px}.educators-heading{gap:30px}.educators-heading>p br{display:none}}
@media(max-width:780px){.educators-heading{grid-template-columns:1fr;gap:20px}.educators-heading>p{max-width:none}.educator-grid{grid-template-columns:1fr 1fr}.educator-director{grid-column:1/-1;display:grid;grid-template-columns:1fr 1fr;gap:0 36px;padding:30px}.educator-director .educator-top{grid-column:1/-1}.educator-director h4,.educator-director .educator-role,.educator-director .educator-description,.educator-director .educator-links{grid-column:1}.educator-director .educator-credentials{grid-column:2;grid-row:2/4;margin-top:26px}.educator-director .educator-work-label{grid-column:2;grid-row:4;align-self:end;margin-top:18px}.educator-director .educator-specialty{grid-column:2;grid-row:5}.educator-film{border-left:0}.educator-director .educator-links{padding-top:22px}.educators-inquiry{gap:23px;align-items:flex-start;flex-direction:column}}
@media(max-width:600px){.educators{margin-top:38px;padding-top:30px}.educators-heading{margin-bottom:24px}.educators-heading h3{font-size:30px;margin-top:15px}.educators-heading>p{font-size:1rem}.educator-grid{grid-template-columns:1fr}.educator,.educator-director{display:flex;grid-column:auto;padding:27px 23px}.educator+.educator{border-left:0;border-top:1px solid #8eaaa0}.educator h4{font-size:38px;margin-top:20px}.educator-description{margin-top:18px}.educator-work-label{margin-top:22px}.educator-director .educator-credentials{margin-top:22px}.educator-works li{grid-template-columns:minmax(0,1fr) auto;align-items:baseline;gap:8px 12px;padding-block:13px}.educator-type .educator-works li{grid-template-columns:1fr}.educator-links{padding-top:20px}.educators-inquiry{padding-top:23px;gap:15px}.educators-inquiry>a{font-size:.9375rem}.educator-more .educator-works li{grid-template-columns:1fr}.teacher-profile-link{font-size:.875rem}}
@media(max-width:360px){.educator,.educator-director{padding-inline:18px}.educator-works li{grid-template-columns:1fr}.educators-heading h3{font-size:27px}}
@media(forced-colors:active){.educator-director{background:Canvas;color:CanvasText}.educator-director :is(.educator-top,.educator-role,.educator-work-label,.educator-description){color:CanvasText}.educator-links a,.educator-director .educator-links a,.educators-inquiry>a,.teacher-profile-link{color:LinkText}}
@media print{.educator-grid{display:block}.educator{break-inside:avoid;margin-block:20px;border:1px solid #777}.educator-director{background:white;color:#102b35}.educator-director :is(.educator-top,.educator-role,.educator-work-label,.educator-description),.educator-director .educator-links a{color:#102b35}.educators-inquiry{display:none}}

/* Start with the courses, then the people and the thinking behind them. */
.classes{padding-top:88px;padding-bottom:72px}
.review-section{padding-top:0;padding-bottom:76px}
.about{border-top:1px solid var(--line);padding-top:92px}

/* Solid surfaces identify the main decisions; reference links stay typographic. */
.subject-open{grid-template-columns:minmax(0,1fr) 32px;padding:16px 20px;min-height:84px;border:1px solid #173e38;background:#173e38;color:#f5f6ec;transition:background .2s,border-color .2s}
.subject-open strong{font-size:1rem;font-weight:600}
.subject-open small{color:#c3dfd2;font-size:.875rem}
.subject-open .disclosure-mark{width:32px;height:32px;border:1px solid #b8d9ca80;border-radius:50%}
.subject-open .disclosure-mark:before,.subject-open .disclosure-mark:after{left:7px;top:14px;width:16px}
.subject-card:hover .subject-open,.subject-card:focus-visible .subject-open{background:#25564a;border-color:#25564a;color:#fffefa}
.course-info .course-inquiry,.educators-inquiry>a{display:inline-flex;justify-content:center;align-items:center;gap:12px;min-height:52px;padding:13px 20px;border:1px solid #173e38;background:#173e38;color:#fffefa;font-size:1rem;font-weight:600;line-height:1.65;text-align:center;transition:background .2s,border-color .2s}
.course-info .course-inquiry{width:100%;margin-top:26px}
.course-info .course-inquiry:hover,.educators-inquiry>a:hover{background:#25564a;border-color:#25564a}
.bluegreen-home .primary-nav .nav-contact{justify-content:center;min-height:44px;margin-left:3px;padding:7px 16px;border:1px solid var(--mint);background:var(--mint);color:var(--navy)}
.bluegreen-home .primary-nav .nav-contact:after{display:none}
.bluegreen-home .primary-nav .nav-contact:hover{background:#d1f2e5;border-color:#d1f2e5}
.resource-links .text-link,.teacher-profile-link,.educator-links a[target="_blank"],.column-all{font-size:.875rem;min-height:44px;font-weight:500;border-bottom:0;text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:5px;text-decoration-color:#7e9d8d}
.resource-links .text-link,.teacher-profile-link,.column-all{color:#385c4f}
.resource-links .text-link:hover,.teacher-profile-link:hover,.educator-links a[target="_blank"]:hover,.column-all:hover{text-decoration-thickness:2px;text-decoration-color:currentColor}
.educator-director .educator-links a{color:#d0efe0;text-decoration-color:#81a898}

/* One statement, one colour wheel, then the three real places. */
.network-section .section-kicker{margin-bottom:34px}
.network-overview{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(240px,.85fr);align-items:center;gap:40px 8%;padding:12px 0 54px}
.network-copy h2{font-family:var(--font-display);font-size:clamp(34px,4vw,54px);font-weight:600;line-height:1.5;letter-spacing:-.06em}
.network-copy>p{max-width:36em;margin-top:26px;font-size:1rem;line-height:2;color:#bed2ce}
.network-overview .universe-spectrum{width:248px}
.network-overview .universe-system{gap:23px}
.network-overview .universe-system>p{max-width:280px;font-size:.875rem;line-height:1.85}
.network-overview .universe-system small{display:inline-block;margin-top:4px;font-size:.75rem;max-width:252px;line-height:1.8}

@media(max-width:960px){
 .bluegreen-home .primary-nav .nav-contact{margin:12px 0 0;min-height:48px;padding:10px 16px}
}
@media(max-width:780px){
 .network-overview{grid-template-columns:minmax(0,1fr) 230px;gap:35px;padding-bottom:40px}
 .network-copy h2{font-size:35px}
 .network-overview .universe-spectrum{width:200px}
 .network-overview .universe-system>p{max-width:225px}
}
@media(max-width:600px){
 .classes{padding-top:58px;padding-bottom:42px}
 .review-section{padding-bottom:50px}
 .about{padding-top:60px}
 .subject-open{padding:15px 18px;min-height:84px;column-gap:14px}
 .subject-open strong{font-size:1rem}
 .educators-inquiry>a{width:100%;font-size:.9375rem}
 .network-section .section-kicker{margin-bottom:29px}
 .network-overview{grid-template-columns:1fr;gap:40px;padding:0 0 38px}
 .network-copy h2{font-size:34px}
 .network-copy>p{margin-top:21px;line-height:1.9}
 .network-overview .universe-system{gap:20px}
 .network-overview .universe-spectrum{width:205px}
 .network-overview .universe-system>p{max-width:270px}
}
@media(prefers-reduced-motion:reduce){.subject-open,.course-info .course-inquiry,.educators-inquiry>a{transition:none}}
@media(forced-colors:active){
 .subject-open,.course-info .course-inquiry,.educators-inquiry>a,.bluegreen-home .primary-nav .nav-contact{background:Canvas;color:LinkText;border-color:LinkText}
 .subject-open small,.network-copy>p{color:CanvasText}
 .subject-open .disclosure-mark{border-color:LinkText}
 .resource-links .text-link,.teacher-profile-link,.educator-links a[target="_blank"],.column-all{color:LinkText;text-decoration-color:LinkText}
}
@media print{
 .subject-open,.course-info .course-inquiry{background:white;color:#102b35;border-color:#102b35}
 .subject-open small{color:#102b35}
 .network-overview{grid-template-columns:1fr 240px}
 .network-copy>p{color:#102b35}
 .educators-inquiry>a{display:none}
}