/* Portrait edition: original content, books, reviews and lesson interactions retained. */
:root{--paper:#fff;--white:#fff;--ink:#23282b;--dark:#203b33;--muted:#687174;--line:#e1e6e3;--gold:#3c7564;--pale:#f4f6f5}
body{background:#fff;color:var(--ink)}
.header{background:#fffffff2;border-color:#e8ebe9}
.header nav>a{color:#505a5b}.header .nav-contact{color:#fff;background:#285c4c;border-color:#285c4c}
.brand-mark>span,.text-link:hover{color:#3c7564}
.primary{background:#285c4c;color:#fff}.primary:hover{background:#204b3e}
.section{padding-block:94px}h2{font-weight:600;letter-spacing:-1.7px}em{color:#426e61}
.eyebrow{color:#6b7c76;letter-spacing:1.65px}
.hero{background:#fff}.hero-inner{grid-template-columns:1fr 1fr;gap:20px;min-height:645px;padding-block:16px 0;align-items:center}
.hero-copy{padding:54px 0 64px;position:relative;z-index:1}
.hero-copy .eyebrow{margin-bottom:37px}.hero-subject{color:#57635e}
.hero h1{font-size:clamp(46px,4.5vw,65px);line-height:1.34;letter-spacing:-3.8px;font-weight:600}
.hero h1 em{color:#285c4c}.hero h1 em:after{display:none}
.hero-desc{margin-top:28px;color:#525c5a;font-size:16px}
.hero-byline{color:#7a8580}.hero-actions{margin-top:30px;gap:28px}
.portrait-hero{height:625px;position:relative;overflow:hidden;align-self:end;background:#fff}
.portrait-hero>img{width:100%;height:100%;object-fit:cover;object-position:72% 50%;filter:grayscale(1);mix-blend-mode:multiply}
.portrait-hero figcaption{position:absolute;left:27px;bottom:29px;right:20px;color:#2d3535;background:#ffffffeb;padding:14px 18px;width:fit-content;border-left:2px solid #487262}
.portrait-hero figcaption>span{font-size:13px;letter-spacing:3.3px;font-weight:600}
.portrait-hero figcaption>p{font-size:10px;color:#6b7470;margin-top:4px}
.hero-bottom{padding-block:18px;border-color:#e2e7e4}
.proof-strip{padding-block:31px}.proof-strip strong{color:#293b33;font-size:35px}.proof-strip p{color:#68736e}
.originals-preview{padding-block:52px 58px;border-bottom:1px solid var(--line)}
.originals-preview .hero-editorial.five-book-editorial{display:grid;grid-template-columns:235px 1fr;column-gap:54px;row-gap:20px;background:#fff;padding:0;border:0;border-radius:0;box-shadow:none}
.originals-preview .editorial-topline{grid-column:1;grid-row:1;display:flex;flex-direction:column;align-items:start;gap:9px;padding:0;border:0;font-size:10px;color:#65746e;letter-spacing:1.4px}
.originals-preview .five-book-shelf{grid-column:2;grid-row:1 / span 2;display:grid;grid-template-columns:repeat(5,minmax(0,1fr));max-width:none;gap:23px;margin:0;align-items:start}
.originals-preview .hero-shelf-book{grid-column:auto!important;min-width:0}
.originals-preview .hero-shelf-cover{border:1px solid #e6e6e4;box-shadow:3px 6px 10px #233e3410;transform:none!important;aspect-ratio:952/1348;background:#fff}
.originals-preview .hero-shelf-cover img{filter:none}
.originals-preview .hero-shelf-label{font-size:11px;margin-top:12px;line-height:1.6;gap:5px}
.originals-preview .editorial-caption{grid-column:1;grid-row:2;display:block;border:0;padding:0;align-self:start;margin:0}
.originals-preview .editorial-caption p{font-size:25px;line-height:1.65;letter-spacing:-.8px;color:#2b3532}
.originals-preview .editorial-caption a{display:inline-flex;font-size:11px;line-height:1.8;margin-top:19px;gap:14px;color:#527164}
.teacher-section{background:#f4f6f6}.teacher-layout{grid-template-columns:1fr 1.15fr;gap:68px;align-items:start}
.teacher-identity{background:#fff;color:#232c2d;padding:0 0 29px;overflow:hidden}
.identity-overline{display:block;padding:23px 28px 0;color:#738079;font-size:9px}
.portrait-profile{height:355px;overflow:hidden;margin:15px 0 25px}
.portrait-profile img{width:100%;height:100%;object-fit:cover;object-position:50% 35%}
.teacher-identity h3,.teacher-identity>p,.identity-signature{margin-left:28px;margin-right:28px}
.teacher-identity h3{font-size:26px;margin-top:0;color:#263630}
.teacher-identity>p{font-size:14px;color:#636f6b;line-height:1.9;margin-top:14px}
.identity-signature{border-color:#dfe5e2;color:#31483d;margin-top:25px;padding-top:20px;font-size:14px}
.identity-signature span{color:#75817b}.record-intro{font-size:25px}
.lesson-portrait-intro{display:grid;grid-template-columns:1.1fr 1fr;align-items:center;gap:50px;min-height:340px;margin-bottom:32px;border-bottom:1px solid var(--line)}
.lesson-portrait-intro .section-head{display:block;margin:0;padding-block:10px 36px}
.lesson-portrait-intro .section-note{margin-top:20px;font-size:14px}
.portrait-lesson{height:340px;overflow:hidden;align-self:end}
.portrait-lesson img{width:100%;height:100%;object-fit:cover;object-position:49% 25%;filter:grayscale(.85);mix-blend-mode:multiply}
.concept-challenge{border:1px solid #dce5df}
.challenge-board{background:#f3f7f4;color:#243b30;padding:35px 38px}
.challenge-label{color:#4e7161;border-color:#cad9ce}.challenge-board-note{color:#6d7d73}
.challenge-mark{color:#244f3210}.challenge-answer{background:#fff}.challenge-answer .button{background:#285c4c}
.challenge-expression{color:#1f3a2d}.challenge-prompt{color:#33473c}
.challenge-solution{background:#f5f8f5}.challenge-philosophy{background:#fff}
.original-shelf.book-track{background:#f4f6f7;border-color:#e0e5e6}
.book-track img,.review-track img,.origin-archive img{filter:none}
.material{background:#fff}.difference-section{background:#f4f6f5}
.review-topic{color:#3b705b}.student-story{background:#f0f6ef}.guide-section{background:#f7f8f6}
.trial-invitation{grid-template-columns:1fr 1.13fr;gap:50px;align-items:center;background:#fff;border-top:2px solid #4b7965;padding:36px 40px 0;overflow:hidden}
.trial-invitation>div:first-child{align-self:start}
.trial-invitation>div:last-child{padding-bottom:36px}
.trial-invitation h3{font-size:26px;color:#2c4435}
.portrait-conversation{height:260px;overflow:hidden;margin:24px -20px 0}
.portrait-conversation img{height:100%;width:100%;object-fit:cover;object-position:49% 0%;mix-blend-mode:multiply}
.contact-section{background:#214f40}.contact-section .eyebrow{color:#afcbbf}.contact-section p:not(.eyebrow){color:#d0ded4}
.contact-section h2{color:#fff}.contact-section .light{background:#fff;color:#214f40}
.contact-watermark{color:#ffffff07}
@media(min-width:1450px){.hero-inner{min-height:690px}.portrait-hero{height:660px}}
@media(max-width:1000px){
 .hero-inner{gap:0;min-height:580px}.hero h1{font-size:48px}.hero-desc{font-size:14px}.hero-actions{gap:18px}.hero-actions .button{padding:14px 17px;gap:18px}
 .portrait-hero{height:565px}.portrait-hero figcaption{left:15px;bottom:25px}
 .originals-preview .hero-editorial.five-book-editorial{grid-template-columns:195px 1fr;column-gap:30px}.originals-preview .five-book-shelf{gap:14px}.originals-preview .editorial-caption p{font-size:22px}
 .teacher-layout{gap:38px}.portrait-profile{height:320px}.record-intro{font-size:22px}
 .lesson-portrait-intro{gap:25px}.lesson-portrait-intro h2{font-size:32px}.portrait-lesson{height:310px}
 .trial-invitation{gap:30px;padding:30px 28px 0}.trial-invitation h3{font-size:24px}
}
@media(max-width:760px){
 .section{padding-block:68px}.hero-inner{grid-template-columns:1fr;min-height:0;gap:0;padding-top:0}.hero-copy{padding:40px 0 16px}.hero-copy .eyebrow{margin-bottom:22px}
 .hero h1{font-size:48px;letter-spacing:-2.6px}.hero-desc{font-size:15px;margin-top:22px}.hero-byline{font-size:11px}
 .hero-actions{margin-top:24px}.portrait-hero{height:390px;width:100%;max-width:530px;justify-self:center;margin-top:8px}
 .portrait-hero>img{object-position:67% 38%}.portrait-hero figcaption{bottom:19px;left:0;padding:11px 14px}.portrait-hero figcaption>span{font-size:11px}
 .hero-bottom{font-size:10px;gap:12px}.hero-bottom a>span{margin-left:6px}
 .proof-strip{padding-block:25px}.proof-strip strong{font-size:30px}.proof-strip p{font-size:10px}
 .originals-preview{padding-block:36px 40px}.originals-preview .hero-editorial.five-book-editorial{display:flex;flex-direction:column;gap:0}
 .originals-preview .editorial-topline{flex-direction:row;justify-content:space-between;font-size:9px}
 .originals-preview .editorial-caption{order:1;margin:15px 0 23px;display:flex;justify-content:space-between;gap:16px;align-items:end;width:100%}
 .originals-preview .editorial-caption p{font-size:22px}.originals-preview .editorial-caption a{font-size:10px;max-width:120px;margin:0}
 .originals-preview .five-book-shelf{order:2;width:100%;gap:12px}.originals-preview .hero-shelf-label{font-size:9px;display:block;margin-top:8px}.originals-preview .hero-shelf-label b{display:none}
 .teacher-layout{grid-template-columns:1fr;gap:36px}.portrait-profile{height:370px;max-width:520px;margin-inline:auto}.teacher-identity h3{margin-top:0}
 .teacher-identity>p{max-width:none}.teacher-record .record-intro{font-size:24px}
 .lesson-portrait-intro{grid-template-columns:1fr;gap:0;margin-bottom:25px;min-height:0}.lesson-portrait-intro .section-head{padding:0}.lesson-portrait-intro h2{font-size:32px}
 .portrait-lesson{height:280px;width:100%;max-width:480px;justify-self:center;margin-top:16px}.portrait-lesson img{object-position:49% 23%}
 .challenge-board{padding:29px 26px}.challenge-prompt{font-size:17px}
 .trial-invitation{grid-template-columns:1fr;gap:28px;padding:28px 26px 0}.trial-invitation h3{font-size:25px}.portrait-conversation{height:255px;max-width:440px;margin:20px auto 0}
 .trial-invitation>div:last-child{padding-bottom:29px}.contact-section h2{font-size:30px}
}
@media(max-width:420px){
 .hero h1{font-size:43px}.hero-desc{font-size:14px}.hero-copy{padding-top:32px}.portrait-hero{height:350px}.hero-actions{gap:19px}
 .originals-preview .five-book-shelf{gap:8px}.originals-preview .hero-shelf-label{font-size:8px;word-break:keep-all}
 .originals-preview .editorial-caption p{font-size:21px}.originals-preview .editorial-caption a{max-width:105px}
 .portrait-profile{height:300px}.lesson-portrait-intro h2{font-size:29px}.portrait-lesson{height:255px}.challenge-board{padding-inline:22px}
 .teacher-identity h3{font-size:24px}.contact-section h2{font-size:26px}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
@media(max-width:360px){.hero h1{font-size:36px;letter-spacing:-2px}.hero-actions{gap:15px}.hero-desc{font-size:13px}}

/* Curriculum: a complete light palette, including all dynamic tab states. */
#classes{background:#f3f5f4;color:#24312a}
#classes>.section{padding-block:80px}
#classes .section-head{margin-bottom:23px;gap:35px}
#classes .eyebrow{color:#50675b;margin-bottom:15px}
#classes h2{color:#24312a;line-height:1.4}
#classes .section-note{color:#526158;font-size:14px;line-height:1.8}
#classes .section-intro{color:#46584d;max-width:780px;font-size:15px;line-height:1.85;margin:0}
#classes .curriculum-tabs{margin-top:30px;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:6px;padding:5px;background:#e5ece7;border:1px solid #d7e0da;border-radius:8px}
#classes .curriculum-tabs button{display:flex;align-items:center;justify-content:center;gap:12px;margin:0;padding:16px 12px;min-height:56px;border:0;border-radius:4px;background:transparent;color:#465c4f;font:500 12px/1.4 var(--sans);text-align:center}
#classes .curriculum-tabs button>span{margin:0;color:inherit;font-size:17px;font-weight:600}
#classes .curriculum-tabs button:hover{background:#f6f9f7;color:#254f3d}
#classes .curriculum-tabs button[aria-selected=true]{background:#285c4c;color:#fff}
#classes .curriculum-panel{display:grid;grid-template-columns:.95fr 1.05fr;gap:24px;padding:24px 0 0;align-items:stretch}
#classes .curriculum-summary,#classes .curriculum-body{min-width:0;background:#fff;border:1px solid #dce4de;border-radius:7px;padding:30px}
#classes .tag{display:inline-block;background:#edf4ef;color:#28563f;font-size:12px;font-weight:500;line-height:1.7;padding:7px 11px;border-radius:3px}
#classes .curriculum-summary h3{font:600 29px/1.45 var(--sans);color:#24312a;letter-spacing:-1px;margin:20px 0 16px}
#classes .curriculum-summary>p{color:#45554b;max-width:none;font-size:15px;line-height:1.9}
#classes .curriculum-books{background:#f5f7f5;border:0;border-left:3px solid #6b8e79;padding:16px 18px;margin-top:25px}
#classes .curriculum-books>span{display:block;color:#4b6254;font-size:12px;font-weight:600;line-height:1.5}
#classes .curriculum-books>p{color:#293e31;font-size:15px;line-height:1.85;font-weight:500;margin-top:8px}
#classes .learning-order-label{font-size:12px;font-weight:600;color:#52695b;letter-spacing:.2px;margin:0 0 8px}
#classes .course-steps>div{display:grid;grid-template-columns:30px minmax(0,1fr);gap:16px;padding:18px 0;border-bottom:1px solid #e0e7e2}
#classes .course-steps>div:first-child{padding-top:18px}
#classes .course-steps>div:last-child{border:0;padding-bottom:6px}
#classes .course-steps>div>span{display:flex;align-items:center;justify-content:center;align-self:start;width:30px;height:30px;margin-top:0;background:#eff5f0;border-radius:50%;color:#3a644d;font:500 12px/1 var(--sans)}
#classes .course-steps h4{color:#28382e;font-size:18px;font-weight:600;line-height:1.5;margin-bottom:6px;letter-spacing:-.4px}
#classes .course-steps p{color:#4c5d51;font-size:15px;line-height:1.8}
#classes .checkpoint{margin-top:23px;background:#edf4ef;border:1px solid #d2e3d7;border-radius:4px;padding:18px 20px}
#classes .checkpoint>span{display:block;font-size:12px;color:#3a6049;font-weight:600;line-height:1.6}
#classes .checkpoint p{color:#284333;font-size:15px;line-height:1.8;margin-top:8px}
#classes .course-purpose{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:24px;padding:0;border:0}
#classes .course-purpose>div{display:block;background:#fff;border:1px solid #dce4de;border-radius:7px;padding:22px 25px}
#classes .course-purpose span{display:block;font-size:15px;font-weight:600;line-height:1.6;color:#28523c;margin-bottom:8px}
#classes .course-purpose p{color:#4b5d50;font-size:15px;line-height:1.8;margin:0}
#classes .curriculum-footnote{font-size:12px;color:#56685c;line-height:1.8;margin:20px 0 0;max-width:900px}
#classes .curriculum-book-choice{display:grid;grid-template-columns:105px minmax(0,1fr);gap:22px;align-items:start;margin-top:24px;padding:22px 25px;background:#eaf1ec;border-left:3px solid #527a61;border-radius:0 4px 4px 0}
#classes .curriculum-book-choice>span{color:#3b5b48;font-size:12px;font-weight:600;line-height:1.85;padding-top:2px}
#classes .curriculum-book-choice p{font-size:14px;line-height:1.9;color:#42574a}
#classes .curriculum-book-choice strong{font-weight:600;font-size:16px;color:#263d2f}
@media(max-width:900px){
 #classes .curriculum-panel{gap:18px}
 #classes .curriculum-summary,#classes .curriculum-body{padding:25px}
 #classes .curriculum-summary h3{font-size:26px}
 #classes .course-purpose{gap:18px}
}
@media(max-width:760px){
 #classes>.section{padding-block:52px}
 #classes .section-head{display:block;margin-bottom:18px}
 #classes .eyebrow{font-size:10px;margin-bottom:14px}
 #classes h2{font-size:30px;line-height:1.45;letter-spacing:-1px}
 #classes .section-note{font-size:14px;line-height:1.75;margin-top:16px}
 #classes .section-intro{font-size:14px;line-height:1.85}
 #classes .curriculum-tabs{margin-top:24px;gap:4px;padding:4px}
 #classes .curriculum-tabs button{min-height:61px;flex-direction:column;gap:3px;padding:8px 4px;font-size:10px;line-height:1.3}
 #classes .curriculum-tabs button>span{font-size:14px;line-height:1.5;white-space:nowrap}
 #classes .curriculum-panel{grid-template-columns:1fr;gap:15px;padding-top:17px}
 #classes .curriculum-summary,#classes .curriculum-body{padding:24px 22px}
 #classes .tag{font-size:11px;line-height:1.7;padding:6px 9px}
 #classes .curriculum-summary h3{font-size:26px;line-height:1.45;margin:17px 0 14px}
 #classes .curriculum-summary>p{font-size:15px;line-height:1.85}
 #classes .curriculum-books{margin-top:22px;padding:14px 15px}
 #classes .curriculum-books>p{font-size:14px;line-height:1.85}
 #classes .course-steps>div{gap:13px;padding-block:17px}
 #classes .course-steps h4{font-size:17px;margin-bottom:6px}
 #classes .course-steps p{font-size:14px;line-height:1.85}
 #classes .checkpoint{margin-top:20px;padding:16px}
 #classes .checkpoint p{font-size:14px;line-height:1.85}
 #classes .course-purpose{grid-template-columns:1fr;gap:12px;margin-top:15px}
 #classes .course-purpose>div{padding:20px 22px}
 #classes .course-purpose span{font-size:14px;margin-bottom:6px}
 #classes .course-purpose p{font-size:14px;line-height:1.85}
 #classes .curriculum-footnote{font-size:12px;margin-top:17px;line-height:1.85}
 #classes .curriculum-book-choice{grid-template-columns:1fr;gap:8px;margin-top:15px;padding:20px 21px}
 #classes .curriculum-book-choice p{font-size:14px;line-height:1.85}
 #classes .curriculum-book-choice strong{font-size:15px}
}
@media(max-width:360px){
 #classes h2{font-size:26px}
 #classes .curriculum-summary,#classes .curriculum-body{padding:22px 18px}
 #classes .curriculum-summary h3{font-size:24px}
 #classes .curriculum-tabs button>span{font-size:13px}
}