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 .balance-panel{grid-template-columns:1fr;padding:35px}.strategy-copy{border-left:0;border-top:1px solid #bdc6b4;padding:27px 0 0}.strategy-copy h3{margin-top:0}
 .discussion{grid-template-columns:1fr;gap:28px}.discussion h3{max-width:none}.discussion .eyebrow{margin-top:15px}
 .model-tab>span{padding:12px}.model-tab strong{font-size:22px}.model-caption p{font-size:17px}.model-links{white-space:normal;min-width:135px}
 .reciprocal-map h3{font-size:25px}.reciprocal-map>div{padding-inline:15px}.shared-door p.bi{font-size:18px}.reading-steps{grid-template-columns:repeat(2,1fr);gap:25px}.reading-steps h4{font-size:18px}
 .submit-section{padding-block:88px}.submit-grid{grid-template-columns:1fr;gap:40px}.submit-grid h2{max-width:620px}.submit-grid .email-link{max-width:570px}
}
@media(max-width:650px){
 :root{scroll-padding-top:128px}.header-inner{display:grid;grid-template-columns:1fr auto;gap:9px 12px;padding-block:10px;min-height:106px}.wordmark{font-size:12px}.language-switch{grid-column:2;grid-row:1;justify-self:end}.language-switch button{font-size:14px;padding:8px 12px;min-height:34px}.edition-control{grid-column:1/-1;grid-row:2;margin-left:0;padding:0;border-left:0;justify-content:space-between;gap:15px}.edition-control label{display:inline;font-size:12px}.edition-control select{font-size:14px;max-width:230px;min-width:145px;padding:4px 0;border-bottom:0;text-align:right}
 .hero-top>.eyebrow,.edition-stamp{font-size:11px;letter-spacing:.7px}.hero-eyebrow{font-size:13px}.hero-intro{font-size:22px!important;max-width:100%;margin-top:28px}.hero-note{font-size:18px!important}.hero h1{font-size:clamp(80px,22vw,126px)}
 html[data-locale=zh] .hero h1{font-size:clamp(70px,21vw,100px);line-height:1.05;letter-spacing:5px}.hero-art{min-height:0}.round-link{font-size:18px;margin-top:25px}.hero-art figcaption{font-size:10px;letter-spacing:.6px;padding-inline:16px}.hero-art figcaption span:first-child{max-width:75%}
 .agenda-total{gap:22px;justify-content:space-between}.agenda-total>.eyebrow{font-size:12px;max-width:180px}.agenda-total strong{font-size:34px}.agenda-total strong span{font-size:13px}.agenda-item{padding-inline:11px}.agenda-item>.bi{font-size:15px;line-height:1.4;min-height:42px}.minutes{font-size:34px}.minutes small{font-size:11px}.agenda-item>span:last-child{font-size:19px}
 .section-space{padding-block:62px}.section-marker{gap:12px;font-size:13px;margin-bottom:32px}.section-index{width:34px;height:34px;font-size:14px}.time-label{font-size:12px;padding:7px 10px;flex:none}.section-intro h2{font-size:42px;line-height:1.2}.section-intro .eyebrow{font-size:13px}
 p.bi,.demo-copy>p.bi,.perspective p.bi,.balance-panel p.bi,.discussion li p.bi,.prototype-note p.bi,.shared-door p.bi,.submit-grid p.bi{font-size:18px;line-height:1.8}.intro-body{font-size:20px!important;line-height:1.75!important}.little-prompt,.little-prompt.bi{font-size:18px}
 .text-link,.back-top{font-size:17px}.demo-list{gap:38px}.demo{padding-top:28px;border-top-width:2px}.demo-copy>.eyebrow{font-size:13px}.project-counter{width:38px;height:38px;font-size:22px!important}.demo-copy h3{font-size:33px;line-height:1.25}.demo-question p.bi{font-size:17px}.image-tag{font-size:12px}.section-footnote,.section-footnote.bi,.perspective .muted,.perspective .muted.bi{font-size:14px!important;line-height:1.8!important}
 .project-heading{padding-top:22px;gap:14px;align-items:center;margin-bottom:30px;flex-wrap:wrap;border-top-width:3px}.project-heading>.eyebrow{font-size:16px;letter-spacing:.8px}.status-pill{font-size:12px;padding:7px 11px;letter-spacing:.4px}.section-intro .project-name{font-size:55px}.serif-line{font-size:25px!important;line-height:1.4!important}
 .carousel-top{padding:18px 14px;gap:14px}.carousel-top p.bi{font-size:15px;line-height:1.6;max-width:240px}.carousel-count{font-size:25px}.carousel-count>span{font-size:17px}.chess-slide h3{font-size:29px}.chess-slide p.bi{font-size:17px;line-height:1.6}.chess-slide figcaption{padding:24px 18px;gap:15px}.concept-letter{font-size:45px}.carousel-tabs button{padding:16px 9px;gap:9px}.carousel-tabs button>span{font-size:14px;line-height:1.4}.carousel-tabs button>b{font-size:22px}.carousel-arrows{padding:12px 14px;gap:12px}.carousel-arrows button{width:44px;height:44px}
 .perspective .eyebrow,.balance-panel .eyebrow{font-size:13px}.perspective h3,.balance-panel h3,.discussion h3{font-size:30px;line-height:1.3}.balance-panel{padding:28px 20px;gap:28px}.balance-flow{gap:10px}.balance-flow span{font-size:15px;line-height:1.5}.balance-flow b{font-size:19px}.goal-note,.balance-panel .goal-note{font-size:17px!important}.strategy-copy .research-note{font-size:17px!important}.discussion .eyebrow{font-size:13px}.discussion li:before{font-size:15px}.discussion li{gap:15px}.prototype-note .bi{font-size:17px}
 .doors-section,.matthew-section{padding-top:42px}.doors-section h2{font-size:49px}.doors-image figcaption{font-size:13px;letter-spacing:.5px;padding:15px 17px}.reciprocal-map h3{font-size:24px;line-height:1.35}.reciprocal-map .eyebrow{font-size:13px}.reciprocal-map p:not(.bi){font-size:14px}.shared-door p.bi{font-size:18px}.reciprocal-map .shared-door h3{font-size:29px}.reading-steps h4{font-size:17px}.reading-steps li{gap:14px}.reading-steps li>span{font-size:29px}
 .matthew-section .project-heading{margin-bottom:30px}.matthew-section blockquote{font-size:40px;line-height:1.2}html[data-locale=zh] .matthew-section blockquote{font-size:36px}.signature{font-size:21px}
 .model-tab{min-width:145px}.model-tab>span{padding:15px 12px}.model-tab strong{font-size:23px}.model-tab small{font-size:12px}.model-launch{padding:25px 18px}.live-label{font-size:12px;letter-spacing:.6px}.launch-button{font-size:19px;padding:16px 20px}.model-launch p{font-size:14px;line-height:1.6}.model-loader{font-size:17px}.model-caption .eyebrow{font-size:13px}.model-caption h3{font-size:32px}.model-caption p{font-size:17px}.model-links .text-link{font-size:16px}.model-credit{font-size:14px}.model-links{gap:20px;flex-wrap:wrap;justify-content:flex-start}
 .submit-section{padding-block:72px}.submit-grid{gap:36px}.submit-grid h2{font-size:41px}.submit-grid .eyebrow{font-size:13px;margin-bottom:24px}.submit-grid .email-link{font-size:clamp(19px,6.3vw,26px);margin-top:28px}.qa-section h2{font-size:40px}.question-list h3{font-size:28px;line-height:1.3}.question-list>div>span:first-child{font-size:14px}.footer-inner{font-size:14px}
}
@media(max-width:650px){
 .agenda{grid-template-columns:1fr}
 html[data-locale=zh] .submit-grid h2{font-size:clamp(32px,10.3vw,41px)}
 .agenda-total strong{white-space:nowrap}
 .agenda-item,.agenda-item:nth-child(2){margin:0;padding:18px 0;border-left:0;border-top:1px solid var(--line);grid-template-columns:80px minmax(0,1fr) 24px;align-items:center;gap:14px}
 .agenda-item:nth-child(2){border-top:0}
 .agenda-item>.bi{grid-column:2;grid-row:1;font-size:18px;min-height:0;margin:0}
 .agenda-item>span:last-child{grid-column:3;grid-row:1}
 .agenda-item .minutes{grid-column:1}
}

/* Weekly presentation standard: equal stage space, with natural document scrolling. */
:root{
 --weekly-header-height:83px;
 --presentation-page-height:calc(100vh - var(--weekly-header-height));
 --presentation-page-padding:clamp(36px,5.2vh,64px);
 scroll-padding-top:var(--weekly-header-height);
}
@supports(height:100svh){
 :root{--presentation-page-height:calc(100svh - var(--weekly-header-height));--presentation-page-padding:clamp(36px,5.2svh,64px)}
}
.presentation-page{
 min-block-size:var(--presentation-page-height);
 padding-block:var(--presentation-page-padding);
 display:flex;
 flex-direction:column;
 justify-content:center;
 border-top:1px solid var(--line);
}
.presentation-page .section-intro{margin-bottom:0}
.presentation-page .section-marker{margin-bottom:clamp(32px,5vh,64px)}
.presentation-page .project-heading{margin-top:0;margin-bottom:36px}
.museum,.ideas-section,.doors-section,.atelier-section{padding-block:0}
.doors-section{border-top:0}
.demo-list{gap:0}
.demo.presentation-page{display:grid;border-top:2px solid #758674}
.chapter-page .section-intro{padding-block:clamp(28px,7vh,84px)}
.chapter-page .section-footnote{margin-top:26px}
.idea-intro-page .section-intro{padding-block:clamp(40px,9vh,108px)}
.concept-page .chess-slide>img{height:clamp(300px,calc(var(--presentation-page-height) - 255px),650px);aspect-ratio:auto;object-fit:cover}
.concept-page .carousel-top{padding-block:18px}
.concept-page .carousel-tabs button{padding-block:18px}
.perspective-page .perspective,.balance-page .balance-panel,.discussion-page .discussion,.doors-details-page .reciprocal-map{margin-top:0}
.perspective-page .perspective>img{aspect-ratio:1.5;object-fit:cover}
.balance-page .balance-panel{padding:44px}
.discussion-page .prototype-note{margin-top:44px}
.duel-page{display:grid;grid-template-columns:1.12fr .88fr;align-items:center;gap:clamp(36px,6vw,84px)}
.duel-image{position:relative;overflow:hidden;border:1px solid var(--line);background:var(--dark)}
.duel-image img{width:100%;height:clamp(320px,calc(var(--presentation-page-height) - 180px),700px);object-fit:cover}
.duel-image figcaption{position:absolute;inset:auto 0 0;padding:46px 20px 17px;color:#fff;background:linear-gradient(transparent,#101a24d9);font-size:12px;letter-spacing:1.3px}
.duel-copy{display:grid;align-content:center;gap:24px}
.duel-copy>.eyebrow{color:var(--orange)}
.duel-copy h3{max-width:12ch;font-size:clamp(34px,4vw,53px)}
.duel-copy>p.bi{font-size:20px;line-height:1.7}
.duel-advantage{border-left:2px solid var(--orange);padding-left:18px}
.doors-intro-page{gap:28px}
.doors-intro-page .project-heading{margin-bottom:0}
.doors-intro-page .section-intro{gap:60px}
.doors-intro-page .doors-image{width:min(100%,1000px);align-self:center}
.doors-intro-page .doors-image>img{height:clamp(220px,calc(var(--presentation-page-height) - 390px),460px);object-fit:contain}
.doors-intro-page .doors-image figcaption{text-align:center;padding:12px 20px}
.doors-details-page .reciprocal-map{padding-block:35px}
.doors-details-page .reading-steps{margin-top:50px;padding-top:36px}
.matthew-section{justify-content:flex-start}
.matthew-section .project-heading{flex:none;margin-bottom:0}
.idea-statement{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;padding-block:64px}
.idea-statement blockquote{text-wrap:balance;max-width:1000px}
.idea-statement .quote-mark{margin-bottom:20px}
.idea-statement .signature{margin-top:40px}
.atelier-gallery-page{padding-block:28px}
.atelier-gallery-page .model-tab img{height:48px;aspect-ratio:auto}
.atelier-gallery-page .model-tab>span{padding:12px 16px}
.atelier-gallery-page .model-stage{height:clamp(280px,calc(var(--presentation-page-height) - 410px),680px);min-height:280px;flex:none}
.atelier-gallery-page .model-caption{margin-top:14px}
.atelier-gallery-page .model-caption h3{margin:6px 0 8px;font-size:32px}
.atelier-gallery-page .model-credit{margin-top:14px;padding-top:15px}
.atelier-gallery-page .section-footnote{margin-top:8px}
.submit-section.presentation-page{padding-block:var(--presentation-page-padding)}
.qa-section .section-marker{margin-bottom:40px}
.qa-section h2{margin-bottom:40px}
.qa-section .question-list>div{padding-block:24px}
.hero.presentation-page{border-top:0;padding-block:24px 32px}
.hero.presentation-page .hero-top{margin-bottom:24px}
.hero.presentation-page .hero-grid{flex:1;gap:52px}
.hero.presentation-page .hero-copy{padding-block:12px}
.hero.presentation-page h1{font-size:clamp(76px,7.8vw,112px)}
.hero.presentation-page .hero-eyebrow{margin-bottom:16px}
.hero.presentation-page .hero-intro{font-size:22px!important;line-height:1.45!important;margin-top:24px}
.hero.presentation-page .hero-note{margin-top:16px}
.hero.presentation-page .round-link{margin-top:20px}
html[data-locale=zh] .hero.presentation-page h1{font-size:clamp(72px,7vw,100px)}
.hero.presentation-page .hero-art{min-height:0;align-self:center;height:clamp(330px,calc(var(--presentation-page-height) - 290px),570px)}
.hero.presentation-page .agenda{margin-top:30px}
.hero.presentation-page .agenda-total{padding-block:17px}
.hero.presentation-page .agenda-item{margin-block:18px}
@media(max-width:1100px){
 .presentation-page{--presentation-page-padding:40px}
 .balance-page .balance-panel{padding:32px}
 .hero.presentation-page .hero-grid{gap:32px}
 .hero.presentation-page h1{font-size:84px}
 .hero.presentation-page .hero-art{height:clamp(330px,calc(var(--presentation-page-height) - 290px),500px)}
 .duel-page{gap:32px}
 .doors-intro-page .section-intro{gap:32px}
 .doors-intro-page .doors-image>img{height:clamp(220px,calc(var(--presentation-page-height) - 420px),460px)}
}
@media(max-width:900px){
 .presentation-page{--presentation-page-padding:48px}
 .duel-page{grid-template-columns:1fr;gap:28px}
 .duel-image img{height:auto;max-height:520px;aspect-ratio:1.5;object-fit:cover}
 .duel-copy h3{max-width:18ch}
 .demo.presentation-page{gap:32px;align-content:center}
 .demo.presentation-page .demo-image{width:min(100%,720px);justify-self:center}
 .demo.presentation-page .demo-image>img{max-height:340px;object-fit:cover}
 .concept-page .chess-slide>img{height:400px}
 .perspective-page .perspective>img{max-height:430px;aspect-ratio:auto;object-fit:contain}
 .balance-page .balance-panel{padding:32px}
 .doors-intro-page .doors-image>img{height:auto;max-height:440px}
 .atelier-gallery-page .model-tab>span{padding:12px}
 .atelier-gallery-page .model-stage{height:450px}
}
@media(min-width:901px) and (max-width:1100px){
 .hero.presentation-page .hero-eyebrow{margin-bottom:12px}
 .hero.presentation-page .hero-intro{margin-top:20px}
 .hero.presentation-page .hero-note{margin-top:12px}
 .hero.presentation-page .round-link{margin-top:16px}
}
@media(max-width:650px){
 :root{--weekly-header-height:107px}
 .presentation-page{--presentation-page-padding:52px}
 .hero.presentation-page{padding-block:28px 36px}
 .hero.presentation-page .hero-grid{gap:30px;flex:none}
 .hero.presentation-page h1{font-size:clamp(80px,22vw,126px)}
 html[data-locale=zh] .hero.presentation-page h1{font-size:clamp(70px,21vw,100px)}
 .hero.presentation-page .hero-art{height:auto;aspect-ratio:1.12}
 .hero.presentation-page .agenda-item{margin-block:0}
 .chapter-page .section-intro,.idea-intro-page .section-intro{padding-block:28px}
 .presentation-page .section-marker{margin-bottom:32px}
 .presentation-page .project-heading{margin-bottom:30px}
 .demo.presentation-page{gap:30px}
 .demo.presentation-page .demo-image>img{max-height:none;aspect-ratio:1.5}
 .concept-page .chess-slide>img{height:auto;aspect-ratio:1.45}
 .concept-page .carousel-top{padding:18px 14px}
 .concept-page .carousel-tabs button{padding:16px 9px}
 .perspective-page .perspective>img{aspect-ratio:1.45;object-fit:cover}
 .balance-page .balance-panel{padding:28px 20px}
 .discussion-page .prototype-note{margin-top:30px}
 .duel-copy{gap:20px}
 .duel-copy>p.bi{font-size:18px}
 .doors-intro-page{gap:28px}
 .doors-intro-page .project-heading{margin-bottom:0}
 .doors-intro-page .section-intro{gap:24px}
 .doors-intro-page .doors-image>img{max-height:none}
 .doors-intro-page .doors-image figcaption{padding:14px 16px}
 .doors-details-page .reciprocal-map{padding-block:0}
 .doors-details-page .reading-steps{margin-top:32px;padding-top:28px}
 .matthew-section .project-heading{margin-bottom:0}
 .idea-statement{padding-block:56px}
 .idea-statement .quote-mark{margin-bottom:12px}
 .idea-statement .signature{margin-top:32px}
 .atelier-gallery-page .model-stage{height:430px}
 .atelier-gallery-page .model-caption h3{font-size:30px}
 .qa-section .question-list>div{padding-block:26px}
}
@media print{
 .presentation-page{min-block-size:0;padding-block:30px;break-before:page}
 .hero.presentation-page{break-before:auto}
 .idea-statement{padding-block:50px}
}

/* Shared Lucas Academy chrome surrounds the independent presentation design. */
.site-header{background:var(--paper);backdrop-filter:none;border-bottom:0}
.weekly-toolbar{background:#f5f2ebf5;border-bottom:1px solid var(--line)}
.weekly-toolbar-inner{display:flex;align-items:center;gap:28px;min-height:60px;padding-block:10px}
.weekly-title{font-family:Georgia,"Songti SC",serif;font-size:20px;white-space:nowrap;text-decoration:none}
.weekly-toolbar .header-nav{margin-left:auto;gap:22px}
.weekly-toolbar .edition-control{padding-left:24px;gap:10px;margin-left:0}
.weekly-toolbar .edition-control select{padding-block:6px}
@media(max-width:1150px){
 .weekly-toolbar-inner{gap:20px}
 .weekly-title{font-size:18px}
 .weekly-toolbar .header-nav{gap:16px}
 .weekly-toolbar .edition-control{padding-left:18px}
}
@media(max-width:900px){
 .weekly-toolbar .edition-control{margin-left:auto}
}
@media(max-width:650px){
 .weekly-toolbar-inner{min-height:50px;padding-block:8px;display:block}
 .weekly-title{display:none}
 .weekly-toolbar .edition-control{display:flex;padding-left:0;border-left:0;margin-left:0}
 .weekly-toolbar .edition-control select{padding:4px 0}
}
@media print{
 .site-header,footer.la-chrome{display:none}
}

/* Language Bridge: the film page, with the live product beside it. */
.doors-film-page{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(0,.65fr);align-items:center;gap:clamp(36px,5vw,72px)}
.film-frame{margin:0}
.film-player{position:relative;display:block;width:100%;aspect-ratio:16/9;overflow:hidden;background:#1b252a;border:0}
.film-player>img{width:100%;height:100%;object-fit:cover;transition:transform .6s}
.film-player:hover>img{transform:scale(1.02)}
.film-play{position:absolute;left:50%;top:50%;width:88px;height:88px;margin:-44px 0 0 -44px;border-radius:50%;background:#f5f2ebeb;color:var(--ink);display:grid;place-items:center;font-size:30px;padding-left:6px;box-shadow:0 12px 34px #0005;transition:transform .3s}
.film-player:hover .film-play{transform:scale(1.06)}
.film-frame figcaption{display:flex;justify-content:space-between;align-items:baseline;gap:20px;padding-top:14px;color:var(--muted);font-size:15px}
.film-frame figcaption .text-link{margin-top:0}
.film-copy{display:grid;gap:22px;align-content:center}
.film-copy>.eyebrow{color:#885a33;font-size:14px;letter-spacing:1.2px}
.film-copy h3{font-size:clamp(32px,3.2vw,46px)}
.film-copy>p.bi{font-size:20px;line-height:1.7}
.lang-try{display:flex;align-items:center;gap:20px;margin-top:8px;padding-top:24px;border-top:1px solid var(--line)}
.lang-try>img{width:128px;height:128px;flex:none}
.lang-try .text-link{margin-top:0;font-size:18px;white-space:nowrap}
.lang-try p.bi{margin-top:6px;color:var(--muted);font-size:15px;line-height:1.6}
@media(max-width:1100px){
 .lang-try{flex-direction:column;align-items:flex-start}
}
@media(max-width:900px){
 .doors-film-page{grid-template-columns:1fr;align-content:center;gap:32px}
 .lang-try{flex-direction:row;align-items:center}
}
@media(max-width:650px){
 .film-play{width:64px;height:64px;margin:-32px 0 0 -32px;font-size:23px;padding-left:4px}
 .film-frame figcaption{flex-direction:column;gap:4px;font-size:14px}
 .film-copy{gap:16px}
 .film-copy>.eyebrow{font-size:13px}
 .film-copy>p.bi{font-size:18px}
 .lang-try>img{width:112px;height:112px}
}
@media print{
 .film-play{display:none}
}

/* Edition 002: each new contribution occupies its own presentation stage. */
.avi-edition-hero .hero-art img{object-position:center;object-fit:contain;background:#d6e0dc}
.avi-preview-heading{display:flex;gap:36px;align-items:end;justify-content:space-between;margin-bottom:24px}.avi-preview-heading h2{font-size:clamp(34px,4vw,54px)}.avi-preview-heading>p{max-width:380px}
.avi-preview{position:relative;min-height:560px;height:calc(var(--presentation-page-height) - 240px);border-radius:24px;overflow:hidden;background:#142d31;color:#eef6ef}
.avi-preview iframe{width:100%;height:100%;border:0;position:absolute;inset:0}.avi-poster{height:100%;display:flex;align-items:center;justify-content:center;gap:48px;padding:36px}.avi-poster img{max-width:52%;height:100%;max-height:650px;object-fit:contain;border-radius:18px}.avi-poster[hidden],.avi-preview [hidden]{display:none}
.avi-preview [data-avi-status]{position:absolute;bottom:18px;left:24px;right:24px;z-index:3;background:#142d31;padding:12px;border-radius:12px}.avi-close{position:absolute;right:18px;top:14px;z-index:3;padding:8px 12px;font-size:12px}.avi-full-preview{align-self:flex-end;margin-top:16px}.avi-next h2,.avi-question h2{max-width:840px;font-size:clamp(40px,5.5vw,78px)}.avi-next .intro-body,.avi-question .intro-body{max-width:720px;margin-top:28px}.avi-next{border-top:2px solid #758674}.avi-next .edition-stamp{margin-bottom:36px;color:#68857b}.avi-question .text-link{margin-top:32px;align-self:flex-start}
@media(max-width:720px){.avi-preview-heading{display:block}.avi-preview-heading>p{margin-top:20px}.avi-preview{height:860px;min-height:860px}.avi-poster{flex-direction:column;gap:24px}.avi-poster img{max-width:100%;height:70%;max-height:580px}.avi-close{right:10px;top:10px}}

.avi-preview-footer{display:flex;gap:20px;align-items:center;justify-content:space-between;margin-top:16px}.avi-preview-footer .avi-close{position:static}.avi-preview-footer .avi-full-preview{margin:0;margin-left:auto}.avi-preview-footer [hidden]{display:none}@media(max-width:720px){.avi-preview{height:780px;min-height:780px}}

.avi-preview-heading#atelier{scroll-margin-top:150px}.avi-preview-footer{flex-wrap:wrap}.avi-preview-footer .avi-museum-link{margin-top:0}@media(max-width:720px){.avi-preview-footer .avi-full-preview{margin-left:0}}

.chess-demo-heading{display:flex;gap:36px;align-items:end;justify-content:space-between;margin-bottom:24px}.chess-demo-heading h2{font-size:clamp(34px,4vw,54px)}.chess-demo-heading>p{max-width:430px}.chess-demo-heading .eyebrow{color:var(--orange)}
.chess-demo{--cd-ink:#f6f8fb;--cd-muted:#a9b7c8;--cd-line:rgba(193,220,241,.18);--cd-mint:#9ed7bd;--cd-coral:#f2a598;--cd-amber:#f3c46b;--cd-panel:rgba(19,32,50,.95);--cd-light:#d9e1ea;--cd-dark:#6d84a0;--cd-check:radial-gradient(circle,rgba(239,74,82,.95) 0%,rgba(239,74,82,.55) 45%,transparent 75%);position:relative;min-height:560px;height:calc(var(--presentation-page-height) - 240px);border-radius:24px;overflow:hidden;background:radial-gradient(circle at 50% -15%,rgba(70,112,154,.23),transparent 45%),radial-gradient(circle at 8% 60%,rgba(75,139,134,.12),transparent 35%),#04070d;color:var(--cd-ink)}
.chess-demo-status{position:absolute;left:24px;right:24px;bottom:18px;z-index:3;padding:12px;border-radius:12px;background:#0d1725;font-size:14px}
.chess-poster{height:100%;display:flex;align-items:center;justify-content:center;gap:56px;padding:36px}.chess-poster img{height:100%;max-height:620px;width:auto;aspect-ratio:1;object-fit:contain;border-radius:14px}
.chess-demo-steps{max-width:360px;list-style:none;margin:0;padding:0;counter-reset:steps}.chess-demo-steps li{counter-increment:steps;display:flex;gap:16px;padding:15px 0;border-top:1px solid #ffffff26;font-size:17px;line-height:1.5}.chess-demo-steps li:before{content:'0' counter(steps);font-size:11px;line-height:2.3;color:var(--cd-mint)}
.chess-demo-footer{display:flex;flex-wrap:wrap;gap:20px;align-items:center;justify-content:space-between;margin-top:16px}
/* The live Comeback demo (tools/weekly/chess-src): board beside the panel on a wide stage, panel under the board on a narrow one. */
.chess-demo .cd{position:absolute;inset:0;display:grid;grid-template-columns:auto minmax(300px,400px);grid-template-rows:minmax(0,1fr);gap:0 24px;align-items:center;justify-content:center;padding:14px 18px;font-size:15px;line-height:1.5}
.chess-demo .cd[data-layout=stacked]{grid-template-columns:minmax(0,1fr);grid-template-rows:auto auto;align-content:start;align-items:start;gap:10px;padding:10px 16px 14px}
.chess-demo .cd-board-area{display:grid;justify-items:center;gap:6px}
.chess-demo .cd-side{display:flex;align-items:center;gap:10px;width:var(--cd-board);min-height:30px;color:var(--cd-muted);font-size:14px}.chess-demo .cd-side-name{color:var(--cd-ink);font-weight:650;white-space:nowrap}.chess-demo .cd-side-name:before{content:"";display:inline-block;width:8px;height:8px;margin-right:8px;border-radius:50%;vertical-align:1px}.chess-demo .cd-side.to-move .cd-side-name:before{background:var(--cd-mint)}.chess-demo .cd-side.thinking .cd-side-name:before{animation:cd-thinking .8s ease-in-out infinite alternate}@keyframes cd-thinking{from{opacity:.25}to{opacity:1}}.chess-demo .cd-fallen{display:flex;flex-wrap:wrap;flex:1;min-width:0}.chess-demo .cd-points{font-variant-numeric:tabular-nums;white-space:nowrap}
.chess-demo .cd-board{display:grid;grid-template-columns:repeat(8,minmax(0,1fr));width:var(--cd-board);aspect-ratio:1;overflow:hidden;border:1px solid var(--cd-line);border-radius:12px;box-shadow:0 30px 90px rgba(0,0,0,.45),0 0 0 6px rgba(13,23,37,.7);user-select:none;-webkit-user-select:none;touch-action:manipulation}
.chess-demo .cd-square{position:relative;display:block;width:100%;aspect-ratio:1;padding:0;border:0;border-radius:0;background:var(--cd-light);cursor:default}.chess-demo .cd-square.dark{background:var(--cd-dark)}.chess-demo .cd-square.last{background:#c9dcc0}.chess-demo .cd-square.dark.last{background:#7f9c86}.chess-demo .cd-square.check{background:var(--cd-check),var(--cd-light)}.chess-demo .cd-square.dark.check{background:var(--cd-check),var(--cd-dark)}.chess-demo .cd-square.comeback-target{cursor:pointer}.chess-demo .cd-square.comeback-target:after{content:"";position:absolute;inset:10%;border:3px dashed #1d6b4c;border-radius:14px;background:rgba(158,215,189,.55);animation:cd-glow 1.4s ease-in-out infinite alternate;pointer-events:none}@keyframes cd-glow{from{opacity:.55}to{opacity:1}}
.chess-demo .cd-coord{position:absolute;font-size:11px;font-weight:700;line-height:1;pointer-events:none}.chess-demo .cd-coord.rank{top:4px;left:4px}.chess-demo .cd-coord.file{right:4px;bottom:3px}.chess-demo .cd-square.light .cd-coord{color:#5a7090}.chess-demo .cd-square.dark .cd-coord{color:#e2e9f1}.chess-demo .cd-returned{position:absolute;top:7%;right:7%;width:18%;height:18%;border:2px solid #0b111a;border-radius:50%;background:var(--cd-mint);pointer-events:none}
.chess-demo .piece{position:absolute;inset:5%;width:90%;height:90%;pointer-events:none;overflow:visible}.chess-demo .piece .body{stroke-width:3.2;stroke-linejoin:round}.chess-demo .piece .detail{fill:none;stroke-width:3;stroke-linecap:round}.chess-demo .piece.white .body{fill:#f7f3ea;stroke:#141a24}.chess-demo .piece.white .detail{stroke:#141a24}.chess-demo .piece.white .eye{fill:#141a24}.chess-demo .piece.black .body{fill:#232a39;stroke:#090c13}.chess-demo .piece.black .detail{stroke:#d7e0ea}.chess-demo .piece.black .eye{fill:#d7e0ea}.chess-demo .piece.black.small .body,.chess-demo .piece.black.tiny .body{stroke:#b9c6d4}.chess-demo .piece.small{position:static;width:20px;height:20px;margin-right:-4px}.chess-demo .piece.tiny{position:static;width:15px;height:15px;vertical-align:-3px}
.chess-demo .cd-panel{display:flex;flex-direction:column;gap:12px;min-width:0;max-height:100%}
.chess-demo .cd-controls{display:flex;gap:8px}.chess-demo .cd-controls button{padding:9px 14px;border:1px solid var(--cd-line);border-radius:12px;background:rgba(4,7,13,.45);font-size:15px;font-weight:600;white-space:nowrap}.chess-demo .cd-controls button:disabled{cursor:default}.chess-demo .cd-controls .cd-play{flex:1 1 auto;min-width:120px;border-color:transparent;background:var(--cd-mint);color:#06120d}.chess-demo .cd-controls .cd-play[aria-pressed=true]{border-color:rgba(158,215,189,.7);background:rgba(158,215,189,.22);color:var(--cd-ink)}
.chess-demo .cd-caption{min-height:4.6em;font-size:16px;font-weight:550;line-height:1.5}
.chess-demo .cd-comeback{padding:14px;border:1px solid rgba(158,215,189,.55);border-radius:16px;background:rgba(158,215,189,.1)}.chess-demo .cd-comeback-title{margin-bottom:10px;font-weight:700}.chess-demo .cd-comeback-title strong{color:var(--cd-mint)}.chess-demo .cd-options{display:flex;flex-wrap:wrap;gap:8px}.chess-demo .cd-option{display:grid;grid-template-columns:auto auto;align-items:center;column-gap:8px;padding:6px 12px 6px 8px;border:1px solid var(--cd-line);border-radius:12px;background:rgba(4,7,13,.45);font-size:14px;text-align:left;text-transform:capitalize}.chess-demo .cd-option[aria-pressed=true]{border-color:var(--cd-mint);background:rgba(158,215,189,.2)}.chess-demo .cd-option .piece.small{grid-row:span 2;width:28px;height:28px;margin:0}.chess-demo .cd-option small{color:var(--cd-muted);font-size:11px;text-transform:none}.chess-demo .cd-hint{margin:10px 0;color:var(--cd-muted);font-size:13px}.chess-demo .cd-comeback-actions{display:flex;gap:8px}.chess-demo .cd-comeback-actions button{flex:1;padding:7px 10px;border:1px solid var(--cd-line);border-radius:10px;background:rgba(4,7,13,.45);font-size:14px}
.chess-demo .cd-meter-head{display:flex;justify-content:space-between;margin-bottom:6px;color:var(--cd-muted);font-size:13px}.chess-demo .cd-meter-value{color:var(--cd-ink);font-weight:650;font-variant-numeric:tabular-nums}.chess-demo .cd-meter-track{position:relative;height:12px;border-radius:999px;background:rgba(193,220,241,.1)}.chess-demo .cd-meter-fill{position:absolute;top:0;bottom:0;border-radius:999px;background:var(--cd-mint);transition:left .2s,width .2s}.chess-demo .cd-meter-fill.behind{background:var(--cd-coral)}.chess-demo .cd-meter-fill.past{background:var(--cd-amber)}.chess-demo .cd-mark{position:absolute;top:-4px;bottom:-4px;width:2px;margin-left:-1px;border-radius:1px}.chess-demo .cd-zero{left:50%;background:rgba(246,248,251,.5)}.chess-demo .cd-line{background:var(--cd-amber)}
.chess-demo .cd-settings{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px}.chess-demo .cd-settings label{display:grid;gap:4px;min-width:0;color:var(--cd-muted);font-size:11px;font-weight:700;letter-spacing:.06em;text-transform:uppercase}.chess-demo .cd-settings select{width:100%;min-width:0;padding:6px 8px;border:1px solid var(--cd-line);border-radius:8px;background:var(--cd-panel);font-size:13px;font-weight:500;letter-spacing:0;text-transform:none}
.chess-demo .cd-moves{flex:1 1 auto;min-height:72px;margin:0;padding:8px 8px 8px 38px;overflow-y:auto;border:1px solid var(--cd-line);border-radius:12px;background:rgba(4,7,13,.35);font-variant-numeric:tabular-nums}.chess-demo .cd-moves:empty:before{content:attr(data-empty);margin-left:-30px;color:var(--cd-muted)}.chess-demo .cd-moves li{padding:1px 0;color:var(--cd-muted)}.chess-demo .cd-ply{display:inline-block;min-width:64px;color:var(--cd-ink)}.chess-demo .cd-came-back{display:inline-flex;align-items:center;margin:0 8px 0 -6px;color:var(--cd-mint);font-size:13px}
.chess-demo .cd[data-layout=stacked] .cd-settings{grid-template-columns:repeat(2,minmax(0,1fr))}.chess-demo .cd[data-layout=stacked] .cd-caption{min-height:3em;font-size:15px}.chess-demo .cd[data-layout=stacked] .cd-moves,.chess-demo .cd-panel.choosing .cd-settings{display:none}
@media(max-width:720px){.chess-demo-heading{display:block}.chess-demo-heading>p{margin-top:20px}.chess-demo{height:880px;min-height:880px}.chess-poster{flex-direction:column;gap:24px;padding:24px}.chess-poster img{height:auto;width:100%;max-height:none}}

/* Edition 002: visual studies and original chess sculptures, following the rules. */
.chess-stage-note.bi{font-size:14px;color:var(--muted);line-height:1.6;max-width:760px}
.chess-design-gallery{border:1px solid var(--line);background:#eee9df}
.chess-design-images{background:#0d121a;touch-action:pan-y}
.chess-design-images figure>img{width:100%;height:clamp(240px,calc(var(--presentation-page-height) - 450px),660px);object-fit:contain}
.chess-design-images figcaption{display:flex;align-items:center;justify-content:space-between;gap:32px;padding:18px 24px;background:#eee9df;color:var(--ink)}
.chess-design-images h3{font-size:27px;letter-spacing:-.5px;margin-top:4px}
.chess-design-images figcaption>p{max-width:480px;font-size:16px;line-height:1.55}
.chess-design-images .eyebrow{font-size:10px;color:var(--orange)}
.chess-design-navigation{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:12px 18px;border-top:1px solid var(--line)}
.chess-design-options{display:flex;flex-wrap:wrap;gap:6px}
.chess-design-options button{padding:10px 14px;background:transparent;border:1px solid transparent;border-radius:6px;font-size:14px}
.chess-design-options button[aria-pressed=true]{border-color:#acb4a4;background:#dfe4d8;color:#263e34}
.chess-design-options button:hover{border-color:var(--line)}
.chess-design-arrows{display:flex;align-items:center;gap:15px;flex:none}
.chess-design-arrows button{width:42px;height:42px;border:1px solid var(--line);border-radius:50%;background:none;font-size:22px}
.chess-design-arrows span{font-size:12px;font-variant-numeric:tabular-nums;color:var(--muted)}
.chess-model-preview{position:relative;min-height:500px;height:clamp(500px,calc(var(--presentation-page-height) - 285px),900px);border-radius:24px;overflow:hidden;background:#11151d;color:#f2eadc}
.chess-model-poster{position:absolute;inset:0;display:grid;place-items:center}
.chess-model-poster img{width:100%;height:100%;object-fit:contain}
.chess-model-poster .launch-button{position:absolute;bottom:36px;left:50%;transform:translateX(-50%);white-space:nowrap;border:1px solid #d8be8c;background:#e8d3a8;color:#202530;border-radius:8px;box-shadow:0 8px 32px #0006}
.chess-model-host{position:absolute;inset:0}
.chess-model-status{position:absolute;top:20px;left:24px;right:24px;z-index:3;padding:12px 18px;border-radius:8px;background:#222938f5;color:#f2eadc;font-size:15px;line-height:1.5;text-align:center;pointer-events:none}
.chess-model-viewer{display:flex;flex-direction:column;height:100%;font-size:14px;color:#f2eadc}
.chess-model-viewer .cm-toolbar{display:flex;flex-wrap:wrap;gap:10px 24px;align-items:center;justify-content:space-between;padding:14px 20px;border-bottom:1px solid #ffffff1c;background:#141923}
.chess-model-viewer .cm-group{display:flex;flex-wrap:wrap;align-items:center;gap:5px}
.chess-model-viewer button{padding:10px 14px;border:1px solid transparent;border-radius:6px;background:transparent;color:#b9bec8;font-size:14px;line-height:1.4}
.chess-model-viewer button:hover{background:#252b36;color:#fff}
.chess-model-viewer button[aria-pressed=true]{background:#2e2c28;color:#f4d5a2;border-color:#8a7756}
.chess-model-viewer button:focus-visible,.chess-model-viewer canvas:focus-visible{outline-color:#ebc981}
.chess-model-viewer .cm-canvas{position:relative;flex:1;min-height:0}
.chess-model-viewer canvas{display:block;width:100%;height:100%;touch-action:none}
.chess-model-viewer .cm-status{position:absolute;top:50%;left:24px;right:24px;padding:12px;background:#141923df;text-align:center;font-size:14px;color:#e5cc9e;pointer-events:none}
.chess-model-viewer .cm-footer{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:16px 22px;border-top:1px solid #ffffff1c;background:#141923}
.chess-model-viewer .cm-meta{max-width:550px;font-size:14px;line-height:1.5;color:#9ca5b3}
.chess-model-viewer .cm-meta strong{display:block;font-size:16px;font-weight:500;color:#e8dac0;margin-bottom:4px}
.chess-model-viewer .cm-tools{flex:none}
.chess-model-viewer .cm-tools button{border-color:#424957;font-size:13px;padding:9px 12px}
.chess-model-viewer .cm-gesture{padding:0 22px 14px;background:#141923;color:#adb4c0;font-size:12px;line-height:1.5}
@media(max-width:900px){
 .chess-design-images figcaption{gap:20px;padding:18px}
 .chess-design-navigation{align-items:flex-start;flex-direction:column}
 .chess-design-arrows{align-self:flex-end}
 .chess-model-viewer .cm-footer{flex-wrap:wrap}
}
@media(max-width:650px){
 .chess-design-images figure>img{height:auto;min-height:0;aspect-ratio:1672/941}
 .chess-design-images figcaption{display:block}
 .chess-design-images figcaption>p{margin-top:14px}
 .chess-design-images h3{font-size:25px}
 .chess-design-navigation{padding:12px;gap:12px}
 .chess-design-options button{padding:10px;font-size:13px}
 .chess-model-preview{height:660px;min-height:660px;border-radius:16px}
 .chess-model-poster .launch-button{font-size:16px;padding:15px 18px;bottom:28px}
 .chess-model-viewer .cm-toolbar{padding:12px;gap:8px}
 .chess-model-viewer button{padding:9px 11px}
 .chess-model-viewer .cm-footer{padding:14px;gap:12px}
 .chess-model-viewer .cm-gesture{padding:0 14px 14px}
 .chess-model-status{left:12px;right:12px;top:12px}
}
@media print{
 .chess-design-images figure[hidden]{display:block!important}
 .chess-design-navigation,.chess-model-poster .launch-button,.chess-model-host,[data-chess-model-close]{display:none!important}
 .chess-model-poster[hidden]{display:grid!important}
}

/* Edition 002: the Wednesday trial, two exercises, and weekly pilot activities. */
.coding-intro-heading{max-width:940px}
.coding-intro-heading h2{margin-top:16px}
.coding-intro-heading .intro-body{max-width:780px;margin-top:24px}
.coding-plan{display:grid;grid-template-columns:1fr 1fr;gap:48px;margin-top:48px;border-top:1px solid var(--line)}
.coding-plan>div{position:relative;padding:32px 44px 0 0}
.coding-plan-index{position:absolute;right:0;top:32px;color:#99a398;font-family:Georgia,serif;font-size:26px}
.coding-plan .eyebrow{color:var(--orange);font-size:12px}
.coding-plan h3{margin-top:12px;font-size:32px}
.coding-plan p.bi{margin-top:16px;font-size:18px;line-height:1.7;max-width:470px}
.coding-intro-footer{display:flex;justify-content:space-between;align-items:center;gap:24px;margin-top:42px}
.coding-exercise-heading{display:grid;grid-template-columns:1.4fr 1fr;align-items:end;gap:48px;margin-bottom:28px}
.coding-exercise-heading h2{margin-top:12px;font-size:clamp(36px,3.8vw,56px)}
.coding-exercise-heading>p{font-size:18px;line-height:1.7}
.coding-exercise{position:relative;min-height:620px;height:clamp(620px,calc(var(--presentation-page-height) - 230px),950px);border:1px solid var(--line);border-radius:16px;overflow:hidden;background:#e9ece2}
.coding-exercise-cover{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:24px;padding:48px;text-align:center}
.coding-exercise-cover .eyebrow{font-size:12px;color:var(--muted)}
.coding-exercise-symbol{font-family:ui-monospace,SFMono-Regular,monospace;font-size:clamp(36px,5vw,62px);letter-spacing:8px;color:#5e7766}
#coding-rainbow .coding-exercise-symbol{background:linear-gradient(100deg,#bf615a,#b59747,#6d9582,#698eb0);background-clip:text;-webkit-background-clip:text;color:transparent}
.coding-exercise-prompt.bi{font-family:Georgia,"Songti SC",serif;font-size:clamp(27px,3vw,40px);line-height:1.35;max-width:600px}
.coding-exercise-cover .launch-button{margin-top:8px;padding:14px 24px;border-radius:8px;border:1px solid #375044;background:#375044;color:#fffdf5;font-size:17px}
.coding-exercise-host{position:absolute;inset:0;background:#fff}
.coding-exercise-host iframe{display:block;width:100%;height:100%;border:0}
.coding-exercise-status{position:absolute;top:16px;left:20px;right:20px;padding:12px 16px;background:#f5f2ebf5;border:1px solid var(--line);border-radius:8px;font-size:15px;line-height:1.6;text-align:center;pointer-events:none}
.coding-exercise-footer{display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-top:22px}
.pilot-activities-page>h2{margin-top:14px}
.pilot-activities-page>.intro-body{margin-top:24px;max-width:800px}
.pilot-activities{list-style:none;padding:0;margin:36px 0;border-top:1px solid #9da99a}
.pilot-activities>li{display:grid;grid-template-columns:180px minmax(0,1fr) minmax(180px,280px);align-items:center;gap:32px;padding:24px 0;border-bottom:1px solid var(--line)}
.pilot-day{display:grid;gap:8px}
.pilot-day strong{font-size:18px;font-weight:500}
.pilot-day>span{font-size:15px;color:var(--muted);line-height:1.5}
.pilot-activity-name h3{font-size:29px;line-height:1.3}
.pilot-activity-name h3 a{text-decoration:none}
.pilot-activity-name h3 a:hover{text-decoration:underline}
.pilot-activity-name>p{margin-top:8px;font-size:15px;line-height:1.6;color:var(--muted)}
.pilot-activity-status{display:flex;flex-direction:column;align-items:flex-end;gap:10px;text-align:right}
.pilot-status{display:inline-flex;align-items:center;padding:8px 14px;border-radius:7px;font-size:15px;line-height:1.5;white-space:nowrap}
.pilot-status-full{background:#e8e5de;color:#696e64}
.pilot-status-open{background:#dde6d8;color:#34513e}
.pilot-presenters{font-size:14px;line-height:1.6;color:var(--muted)}
@media(max-width:900px){
 .coding-plan{gap:30px}
 .coding-exercise-heading{grid-template-columns:1fr;gap:20px}
 .pilot-activities>li{grid-template-columns:120px minmax(0,1fr);gap:16px 24px}
 .pilot-activity-status{grid-column:2;align-items:flex-start;text-align:left}
}
@media(max-width:650px){
 .coding-plan{grid-template-columns:1fr;gap:26px;margin-top:32px}
 .coding-plan>div{padding-top:24px}
 .coding-plan>div+div{border-top:1px solid var(--line)}
 .coding-plan-index{top:24px}
 .coding-plan h3{font-size:28px}
 .coding-intro-footer{flex-wrap:wrap;margin-top:32px}
 .coding-exercise{height:740px;min-height:740px;border-radius:12px}
 .coding-exercise-cover{padding:28px 20px}
 .coding-exercise-heading h2{font-size:36px;letter-spacing:-1px}
 .coding-exercise-heading>p{font-size:18px}
 .coding-exercise-status{left:12px;right:12px;top:12px}
 .pilot-activities>li{grid-template-columns:1fr;gap:16px;padding-block:24px}
 .pilot-day{display:flex;align-items:baseline;justify-content:space-between;gap:16px}
 .pilot-activity-status{grid-column:1}
 .pilot-activity-name h3{font-size:26px}
}
@media print{
 .coding-exercise-host,.coding-exercise-cover .launch-button,[data-exercise-close],.coding-exercise-status{display:none!important}
 .coding-exercise-cover[hidden]{display:flex!important}
}

/* An invitation to explore more projects follows the pilot activity schedule. */
.pilot-activities-footer,.possibilities-footer{display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap}
.possibilities-page>h2{max-width:1000px;margin-top:16px}
.possibilities-page>.intro-body{max-width:800px;margin-top:24px}
.possibility-projects{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));list-style:none;padding:0;margin:48px 0 36px;gap:32px}
.possibility-projects>li{padding:26px 0 32px;border-top:2px solid #869b86;border-bottom:1px solid var(--line);min-height:235px}
.possibility-number{display:block;font-family:Georgia,serif;font-size:24px;color:var(--muted);margin-bottom:24px}
.possibility-projects h3{font-size:31px;line-height:1.3;max-width:320px}
.possibility-examples{list-style:none;padding:0;margin:22px 0 0;display:grid;gap:10px}
.possibility-examples>li{font-size:17px;line-height:1.6;color:var(--muted)}
@media(max-width:720px){
 .possibility-projects{grid-template-columns:1fr;gap:0;margin:32px 0}
 .possibility-projects>li{min-height:0;padding:24px 0;border-top:0}
 .possibility-projects>li:first-child{border-top:2px solid #869b86}
 .possibility-number{font-size:20px;margin-bottom:14px}
 .possibility-projects h3{font-size:29px}
 .possibility-examples{margin-top:16px}
}

/* Edition 002: larger supporting text and Chinese summaries in English view. */
[data-edition-id="002"] .eyebrow,[data-edition-id="002"] .edition-stamp{font-size:18px;letter-spacing:1px}
[data-edition-id="002"] .text-link{font-size:20px;line-height:1.6}
[data-edition-id="002"] .launch-button{font-size:18px}
[data-edition-id="002"] .chess-stage-note.bi{font-size:20px;line-height:1.7}
[data-edition-id="002"] .chess-design-images figcaption>p{font-size:20px;line-height:1.65}
[data-edition-id="002"] .chess-design-options button,[data-edition-id="002"] .chess-design-arrows span{font-size:18px}
[data-edition-id="002"] .chess-model-viewer{font-size:18px}
[data-edition-id="002"] .chess-model-viewer button,[data-edition-id="002"] .chess-model-viewer .cm-gesture,[data-edition-id="002"] .chess-model-viewer .cm-status{font-size:18px}
[data-edition-id="002"] .chess-model-viewer .cm-meta{font-size:18px;line-height:1.6}
[data-edition-id="002"] .chess-model-viewer .cm-meta strong{font-size:21px}
[data-edition-id="002"] .coding-plan p.bi{font-size:20px}
[data-edition-id="002"] .coding-exercise-heading>p{font-size:20px}
[data-edition-id="002"] .pilot-day>span,[data-edition-id="002"] .pilot-status,[data-edition-id="002"] .pilot-presenters{font-size:18px}
[data-edition-id="002"] .pilot-activity-name>p,[data-edition-id="002"] .possibility-examples>li{font-size:20px;line-height:1.65}
[data-edition-id="002"] .chess-model-status,[data-edition-id="002"] .coding-exercise-status,[data-edition-id="002"] .chess-demo-status{font-size:18px}
[data-edition-id="002"] .chess-demo .cd{font-size:18px}
[data-edition-id="002"] .chess-demo .cd-side,[data-edition-id="002"] .chess-demo .cd-controls button,[data-edition-id="002"] .chess-demo .cd-hint,[data-edition-id="002"] .chess-demo .cd-meter-head{font-size:18px}
[data-edition-id="002"] .chess-demo .cd-caption{font-size:20px}
[data-edition-id="002"] .chess-demo .cd-settings label,[data-edition-id="002"] .chess-demo .cd-settings select,[data-edition-id="002"] .chess-demo .cd-option,[data-edition-id="002"] .chess-demo .cd-comeback-actions button{font-size:16px;letter-spacing:0}
[data-edition-id="002"] .chess-demo .cd-settings{grid-template-columns:repeat(2,minmax(0,1fr))}
[data-edition-id="002"] .chess-demo .cd-settings label,[data-edition-id="002"] .chess-demo .cd-settings select{font-size:18px}
[data-edition-id="002"] .chess-demo .cd-option small,[data-edition-id="002"] .chess-demo .cd-came-back{font-size:16px}
[data-edition-id="002"] .chess-demo .cd-coord{font-size:14px}
.parent-note{margin-top:26px;padding-top:18px;border-top:1px solid var(--line);color:#42574e}
.parent-note .parent-note-label{font-size:18px;font-weight:600;line-height:1.6;margin-bottom:6px}
.parent-note>p:last-child{font-size:20px;line-height:1.75}
html[data-locale="zh"] .parent-note{display:none}
.chess-edition-hero.presentation-page .hero-top{flex-wrap:wrap;gap:16px}
.chess-edition-hero.presentation-page .hero-grid{grid-template-columns:minmax(0,.85fr) minmax(0,1.85fr);gap:40px;flex:1}
.chess-edition-hero.presentation-page h1{font-size:clamp(66px,6.8vw,94px);letter-spacing:-4px}
html[data-locale="zh"] .chess-edition-hero.presentation-page h1{font-size:clamp(60px,6.2vw,86px);letter-spacing:4px}
.chess-edition-hero.presentation-page .hero-note{font-size:20px!important;line-height:1.7!important}
.chess-edition-hero.presentation-page .hero-art{height:auto;aspect-ratio:auto;min-height:0;border-radius:16px;overflow:hidden;align-self:center;display:flex;flex-direction:column}
.chess-edition-hero .hero-art>img{width:100%;height:auto;aspect-ratio:1672/941;object-fit:contain;border-radius:0;background:#11151d}
.chess-edition-hero .hero-art figcaption{position:static;background:#11151d;color:#f2eadc;padding:14px 18px;font-size:18px;line-height:1.5;letter-spacing:.6px}
body:has([data-edition-id="002"]) .weekly-toolbar .header-nav a,body:has([data-edition-id="002"]) .edition-control label{font-size:18px}
body:has([data-edition-id="002"]) .edition-control select{font-size:18px;max-width:250px}
@media(max-width:1000px){
 .chess-edition-hero.presentation-page .hero-grid{grid-template-columns:1fr;gap:28px;flex:none}
 .chess-edition-hero .hero-copy{max-width:800px}
 .chess-edition-hero .hero-art{width:100%}
 .chess-edition-hero.presentation-page h1{font-size:74px}
}
@media(max-width:650px){
 .chess-edition-hero.presentation-page h1{font-size:64px;letter-spacing:-2px}
 html[data-locale="zh"] .chess-edition-hero.presentation-page h1{font-size:60px}
 .chess-edition-hero .hero-art figcaption{font-size:18px;padding:12px 16px}
 [data-edition-id="002"] .eyebrow,[data-edition-id="002"] .edition-stamp{letter-spacing:.4px}
 [data-edition-id="002"] .chess-model-viewer .cm-toolbar{gap:12px}
 [data-edition-id="002"] .chess-model-viewer .cm-tools{flex:1 1 100%;min-width:0}
 [data-edition-id="002"] .chess-design-options button{padding:10px 12px}
 .parent-note{margin-top:24px}
}

/* Language Bridge update: original introduction, independently selected films, classroom. */
.bridge-heading{display:grid;grid-template-columns:1.1fr 1fr;gap:60px;align-items:start;margin-bottom:32px}
.bridge-heading h2{margin-top:12px}
.bridge-heading>p.bi{font-size:20px;line-height:1.75}
.bridge-intro-layout{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(0,1fr);gap:44px;align-items:center}
.bridge-video-tabs{display:flex;gap:10px;margin-bottom:14px}
.bridge-video-tabs button{padding:10px 24px;border:1px solid var(--line);border-radius:8px;background:transparent;font-size:20px;line-height:1.5}
.bridge-video-tabs button[aria-selected=true]{background:#375044;border-color:#375044;color:#fffdf5}
.bridge-video-panel{aspect-ratio:16/9;border-radius:14px;overflow:hidden;background:#11151d}
.bridge-video-panel .film-player{display:block;position:relative;width:100%;height:100%;border:0}
.bridge-video-panel img{width:100%;height:100%;object-fit:contain}
.bridge-video-panel .film-play{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);display:grid;place-items:center;width:70px;height:70px;border:1px solid #fff9;border-radius:50%;background:#17332cdf;color:#fffdf5;font-size:26px;line-height:1;box-shadow:0 8px 32px #0004}
.informatics-page{border-top:2px solid #758674;gap:24px}
.informatics-page>.bridge-video{width:min(100%,820px);margin-inline:auto}
.informatics-page .bridge-video-panel img{object-fit:cover}
@media(min-width:960px){
 .informatics-page{display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);align-content:center;align-items:center}
 .informatics-page>.bridge-video{width:min(100%,max(360px,calc((var(--presentation-page-height) - 310px)*1.7778)));margin-right:0}
 .informatics-page>.parent-note{grid-column:1/-1;margin-top:0}
}
.bridge-youtube-link{margin-top:16px}
.bridge-intro-copy>p.bi{font-size:20px;line-height:1.75;margin-top:16px}
.bridge-reading-steps{list-style:none;margin:22px 0 0;padding:0;display:grid;gap:12px}
.bridge-reading-steps li{display:flex;gap:18px;align-items:baseline;font-size:20px;line-height:1.6}
.bridge-reading-steps li>span:first-child{color:var(--muted);font-family:Georgia,serif}
.bridge-footer{display:flex;flex-wrap:wrap;justify-content:space-between;gap:18px 28px;margin-top:26px}
.bridge-class-preview{position:relative;min-height:540px;height:clamp(540px,calc(var(--presentation-page-height) - 300px),1000px);border:1px solid var(--line);border-radius:16px;overflow:hidden;background:#eeeee7}
.bridge-class-preview iframe{display:block;width:100%;height:100%;border:0;background:#faf9f5}
.bridge-class-status{position:absolute;left:24px;right:24px;top:50%;transform:translateY(-50%);text-align:center;font-size:20px;line-height:1.75;background:#f5f2eb;padding:24px;border:1px solid var(--line);border-radius:10px}
@media(max-width:1000px){
 .bridge-heading{gap:32px}
 .bridge-intro-layout{grid-template-columns:1fr;gap:28px}
 .bridge-intro-copy{max-width:800px}
 .bridge-reading-steps{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media(max-width:650px){
 .bridge-heading{grid-template-columns:1fr;gap:22px}
 .bridge-reading-steps{grid-template-columns:1fr}
 .bridge-class-preview{height:650px;min-height:650px}
 .bridge-class-status{left:14px;right:14px;padding:20px}
}