/* U01's quiet book typography and paper surface for the other published units. */
.lesson-edition{--edition-ink:#153447;--edition-muted:#5c7180;--edition-line:#d8e3e8;color:var(--edition-ink);background:#fff;font-family:system-ui,sans-serif;isolation:isolate;container:lesson-page / inline-size}
.edition-cover{padding:34px 68px 0 86px}.edition-running{display:flex;justify-content:space-between;gap:20px;border-bottom:1px solid #e3f4f1;padding-bottom:22px;font:10px/1.6 system-ui;letter-spacing:1.7px;color:#5c7180;text-transform:uppercase}.edition-kicker{font:italic 18px/1.5 Georgia,serif!important;color:#087f84;margin:52px 0 18px!important}.lesson-edition .edition-cover h1{font:normal clamp(38px,5vw,60px)/1.09 Georgia,serif!important;letter-spacing:-1.6px;margin:0 0 24px!important;max-width:740px;color:#153447}.edition-goal{font:19px/1.75 Georgia,serif!important;color:#5c7180;max-width:620px!important;margin:0 0 42px!important}.edition-format{display:flex;justify-content:space-between;gap:18px;padding:18px 0;border-block:1px solid #e3f4f1;color:#5c7180;font:10px/1.6 system-ui;text-transform:uppercase;letter-spacing:1px}
.edition-index{padding:26px 68px 28px 86px}.edition-index>strong{font:11px/1.6 system-ui;color:#5c7180;letter-spacing:1px;text-transform:uppercase}.edition-index>div{display:grid;grid-template-columns:1fr 1fr;gap:2px 24px;margin-top:12px}.edition-index a{display:flex;gap:12px;text-decoration:none;color:#153447;font:13px/1.5 system-ui;padding:9px 0;border-bottom:1px solid #edf3f5}.edition-index a:hover{color:#087f84}.edition-index a span{color:#087f84;font-size:10px;line-height:20px}
.edition-content{max-width:800px;margin:auto;padding:8px 48px 0 60px}.edition-content>[data-content-block]{padding:0!important;scroll-margin-top:100px}.edition-content>[data-content-block]:empty{display:none}.edition-content .lesson-paragraph{font:18px/1.9 Georgia,serif!important;max-width:none;margin:20px 0!important;color:#153447}.edition-content .edition-chapter{margin:54px 0 22px}.edition-chapter>h3{position:relative;margin:0;font:normal 32px/1.2 Georgia,serif;letter-spacing:-.6px;color:#153447}.edition-chapter>h3:before{content:attr(data-chapter);position:absolute;left:-43px;top:8px;font:11px/1.6 system-ui;color:#087f84;letter-spacing:1px}.edition-chapter h3:focus{outline:none}.edition-content .callout{border-left:3px solid #087f84;background:#f1f8f8;border-radius:0 8px 8px 0;padding:22px 26px;margin:28px 0}.edition-content .callout>strong{font:600 15px/1.5 system-ui;color:#087f84}.edition-content .callout .lesson-paragraph{font-size:17px!important;margin:12px 0 0!important}
.edition-content .inline-lesson-slide{margin:30px -22px 38px}.edition-content .inline-lesson-slide img{width:100%;height:auto;border:1px solid #d8e3e8;box-shadow:0 8px 25px #1534470a;border-radius:6px;background:#f8fbfc}.edition-content figcaption{font:11px/1.6 system-ui;text-align:center;color:#5c7180;margin:12px 0 0}.edition-content .inline-media{padding:24px 26px;margin:30px 0 38px;background:#f8fbfc;border:1px solid #d8e3e8;border-radius:8px}.edition-media-label{display:block;font:10px/1.6 system-ui;letter-spacing:1.3px;color:#087f84;margin-bottom:12px}.edition-content .inline-media h3{font:normal 25px/1.3 Georgia,serif;margin:0 0 12px}.edition-content .inline-media>p,.edition-content .inline-media details .lesson-paragraph{font:13px/1.7 system-ui!important;color:#5c7180;margin:12px 0!important}.edition-content .inline-media video{display:block;width:100%;height:auto;aspect-ratio:16/9;border-radius:6px;background:#102f46;margin-top:20px}.edition-content .inline-media audio{height:46px;width:100%;margin:12px 0 0}.edition-content .inline-media details{margin-bottom:0;font:13px/1.6 system-ui}.edition-content .inline-media summary{min-height:44px}
.edition-content .law-exercise{margin:30px -15px 40px;padding:25px;border:1px solid #d8e3e8;border-left:3px solid #087f84;background:#f8fbfc;border-radius:4px 10px 10px 4px}.edition-content .law-exercise h3{font:normal 25px/1.3 Georgia,serif}.edition-content .law-exercise .lesson-paragraph{font-size:16px!important}.edition-content .options{font-size:15px}.edition-content .option{background:#fff}.edition-content .law-token[aria-pressed=true]{background:#e3f4f1;color:#153447;border-color:#087f84}.edition-content button{min-height:44px}.edition-content .lesson-references{border-top:1px solid #d8e3e8;margin-top:52px;padding-top:28px}.edition-content .lesson-references h3{font:normal 26px/1.3 Georgia,serif}.edition-source-note{font:13px/1.7 system-ui!important;color:#5c7180}.edition-content .lesson-references ul{list-style:none;padding:0}.edition-content .lesson-references li{font:13px/1.6 system-ui;padding:10px 0;border-bottom:1px solid #e3f4f1;overflow-wrap:anywhere}.edition-content .lesson-references a{color:#385c70;text-underline-offset:4px}.edition-content .lesson-references .edition-download{padding:14px 16px;background:#f1f8f8;border:1px solid #d8e3e8;border-radius:7px;margin:9px 0}.edition-download a{font-weight:600;color:#087f84!important}.edition-colophon{text-align:center;padding:50px 35px;font:10px/1.8 system-ui;letter-spacing:1px;color:#5c7180}.edition-figure-dialog{width:min(1280px,96vw);max-width:96vw;max-height:94vh;padding:16px;border:0;border-radius:10px;background:#fff}.edition-figure-dialog::backdrop{background:#102f46df}.edition-figure-dialog img{display:block;max-width:100%;max-height:80vh;margin:auto;object-fit:contain}.edition-figure-dialog button{display:block;margin:0 0 14px auto;font:13px/1.5 system-ui;min-height:44px}
/* Shared book surface, while preserving each unit's existing entry and return action. */
body:has(.nell-book-reader:not([hidden])){background:#102f46;color:#153447}body:has(.nell-book-reader:not([hidden]))>header,body:has(.nell-book-reader:not([hidden]))>footer{display:none}body:has(.nell-book-reader:not([hidden])) main{max-width:none;padding:86px 30px 90px;margin:0;min-height:100vh}body:has(.nell-book-reader:not([hidden])) main>h1,body:has(.nell-book-reader:not([hidden])) main>.lead,body:has(.nell-book-reader:not([hidden])) main>.row,body:has(.nell-book-reader:not([hidden])) main>.steps{display:none}.reading-panel:has(.nell-book-reader:not([hidden])){max-width:1080px;margin:0 auto;padding:0;background:transparent;border:0}.reading-panel:has(.nell-book-reader:not([hidden]))>h1,.reading-panel:has(.nell-book-reader:not([hidden]))>h2,.reading-panel:has(.nell-book-reader:not([hidden]))>.lead,.reading-panel:has(.nell-book-reader:not([hidden]))>.eyebrow{display:none}.nell-book-reader:has(.lesson-edition){scroll-margin-top:86px;padding:0;background:#fff;border-radius:3px 9px 9px 3px;box-shadow:0 28px 90px #06192766,5px 0 0 #d8e3e8,9px 0 0 #91aeb9;overflow:visible}.nell-book-reader:has(.lesson-edition)>.nell-book-toolbar{position:fixed;inset:0 0 auto;margin:0;height:64px;z-index:30;display:flex;align-items:center;justify-content:space-between;padding:0 32px;background:#102f46;color:#e3f4f1;border:0;border-bottom:1px solid #ffffff25}.nell-book-reader:has(.lesson-edition)>.nell-book-toolbar button{background:transparent;border:0;color:inherit;font-size:13px}.nell-book-reader:has(.lesson-edition)>button{margin:0 0 36px 8%;background:#087f84;color:white;border:0}.nell-book-reader .lesson-edition{border-radius:3px 9px 0 0}body:has(.nell-book-reader:not([hidden])) #editorial-next{display:block;margin:28px auto;background:#fff;color:#102f46}
body[data-world=book] #learning.unit-journey{max-width:none;padding:96px 32px 110px}.unit-path-book{max-width:1080px;margin:auto}.unit-path-book:has(.lesson-edition) article{padding:0;background:#fff;border:0;border-radius:3px 9px 9px 3px;box-shadow:0 28px 90px #06192766,5px 0 0 #d8e3e8,9px 0 0 #91aeb9}.unit-path-book:has(.lesson-edition) article>.eyebrow,.unit-path-book:has(.lesson-edition) article>h1{display:none}.unit-path-book:has(.lesson-edition) .unit-path-bookbar{position:fixed;inset:0 0 auto;z-index:30;height:66px;background:#102f46;color:#e3f4f1;border:0;border-bottom:1px solid #ffffff20;padding:0 32px}.unit-path-bookbar button{background:transparent;border:0;color:inherit;font-size:13px}.unit-path-bookbar>span{font:11px system-ui;letter-spacing:1px}.unit-path-book:has(.lesson-edition) [data-return-bottom]{margin:0 8% 40px}.unit-path-turn>div,.unit-path-composer textarea{background:#fff;border-color:#d8e3e8}.unit-path-user>div{background:#e3f4f1}.unit-path-case{background:#f1f8f8;border-color:#087f84}.unit-path-header>span{color:#087f84}
@media(max-width:700px){.edition-cover{padding:26px 24px 0 30px}.edition-running{font-size:8px;letter-spacing:1px;gap:10px}.edition-kicker{margin-top:35px!important;font-size:16px!important}.lesson-edition .edition-cover h1{font-size:38px!important;letter-spacing:-1px}.edition-goal{font-size:17px!important;margin-bottom:30px!important}.edition-format{font-size:8px;letter-spacing:.4px;gap:12px}.edition-index{padding:24px 24px 22px 30px}.edition-index>div{grid-template-columns:1fr}.edition-content{padding:0 24px 0 30px}.edition-content .lesson-paragraph{font-size:17px!important;line-height:1.85!important}.edition-content .edition-chapter{margin-top:40px}.edition-chapter>h3{font-size:27px;padding-top:23px}.edition-chapter>h3:before{left:0;top:0;font-size:10px}.edition-content .inline-lesson-slide{margin-inline:-12px}.edition-content .inline-media{padding:18px 16px;margin-inline:-6px}.edition-content .inline-media h3{font-size:23px}.edition-content .law-exercise{margin-inline:-8px;padding:18px 15px}.edition-content .callout{padding:18px}.edition-content .lesson-references li{font-size:12px}.edition-colophon{padding:35px 24px}body:has(.nell-book-reader:not([hidden])) main,body[data-world=book] #learning.unit-journey{padding:78px 10px 80px}.nell-book-reader:has(.lesson-edition)>.nell-book-toolbar,.unit-path-book:has(.lesson-edition) .unit-path-bookbar{padding:0 16px;gap:10px;height:62px}.nell-book-toolbar>span,.unit-path-bookbar>span{display:none}.nell-book-reader:has(.lesson-edition)>button,.unit-path-book:has(.lesson-edition) [data-return-bottom]{max-width:84%;font-size:12px}.edition-figure-dialog{padding:10px}}
@media(prefers-reduced-motion:reduce){.lesson-edition *{scroll-behavior:auto!important}}

.has-personal-rail .unit-path-book:has(.lesson-edition) .unit-path-bookbar{right:var(--personal-rail-width)}
@media(max-width:700px){.has-personal-rail .unit-path-book:has(.lesson-edition) .unit-path-bookbar{right:0;top:43px}.has-personal-rail .edition-content>[data-content-block]{scroll-margin-top:122px}}

.lesson-edition .edition-cover h1:focus{outline:none}.edition-index a:focus-visible,.edition-figure-dialog button:focus-visible{outline:2px solid #087f84;outline-offset:3px}

.lesson-edition .edition-cover h1{hyphens:auto;overflow-wrap:break-word}.lesson-edition .lesson-references{scroll-margin-top:122px}

.edition-captions{margin-top:14px;background:#fff;border:1px solid #d8e3e8;border-radius:6px;color:#153447;padding:10px 14px;font:13px system-ui}

/* The title vignette is shared with older saved editions. */
.edition-cover .nell-illustrated-title{margin:36px 0}
.edition-cover .nell-illustrated-title .edition-kicker{margin:0 0 18px!important}
.edition-cover .nell-illustrated-title .edition-goal{margin:0!important}
.edition-cover .nell-illustrated-title h1{overflow-wrap:anywhere;hyphens:auto;hyphenate-limit-chars:12 5 5}
/* Size the title to its page, including a page narrowed by editorial sidebars. */
.lesson-edition .edition-cover{padding:24px clamp(24px,6cqi,60px) 0}
.lesson-edition .edition-cover h1{font-size:clamp(30px,5.5cqi,46px)!important;line-height:1.14!important;letter-spacing:-.7px;margin-bottom:18px!important}
.edition-cover .nell-illustrated-title{grid-template-columns:minmax(0,1fr) minmax(140px,.48fr);gap:24px;margin:24px 0}
.edition-cover .nell-unit-illustration{max-width:240px}
.edition-cover .edition-goal{font-size:17px!important;line-height:1.65!important}
.edition-cover .nell-illustrated-title .edition-kicker{font-size:16px!important;margin-bottom:14px!important}
@container lesson-page (max-width:560px){
 .edition-cover .nell-illustrated-title{display:flex;flex-direction:column;align-items:stretch;gap:16px}
 .edition-cover .nell-unit-illustration{max-width:150px;align-self:flex-end}
 .edition-running{font-size:8px;letter-spacing:.7px;gap:12px;padding-bottom:16px}
 .edition-index{padding:22px 24px}
 .edition-index>div{grid-template-columns:1fr}
 .edition-content{padding-inline:24px}
}
.edition-content select{max-width:100%;min-width:0}

/* B01–B12 keep downloads, audio and activities together below the reading text. */
.nell-unit-resources{margin:28px 0 36px;padding:24px;background:#f8fbfc;border:1px solid #d8e3e8;border-radius:8px}
.nell-unit-resources h4{margin:0 0 12px;font:normal 24px/1.3 Georgia,serif;color:#153447}
.nell-unit-resources p{font-size:14px;line-height:1.7;color:#5c7180}
.nell-unit-resources audio,.nell-unit-resources video{display:block;width:100%;max-width:100%;margin:16px 0}
.nell-unit-resources .inline-media{margin:24px 0;padding:0;background:transparent;border:0}
.nell-unit-resources [data-resource-content]>[data-content-block]:empty{display:none}
.nell-unit-resources .inline-media h3,.nell-unit-resources .lesson-references h3{font-size:19px;margin:18px 0 12px}
.nell-unit-resources .lesson-references{margin-top:24px;padding-top:18px;border-top:1px solid #d8e3e8}
.nell-unit-resources .lesson-references li{overflow-wrap:anywhere;line-height:1.7;margin:12px 0}
.nell-unit-resources details{font-size:14px;line-height:1.7}.nell-unit-resources summary{cursor:pointer;min-height:44px;padding-top:10px}
.edition-figure-dialog>p{max-width:80ch;margin:18px auto;font:15px/1.6 system-ui;color:#153447}
@media(max-width:600px){.nell-unit-resources{padding:18px 14px}.edition-content .inline-lesson-slide picture{display:block}.edition-figure-dialog img{max-height:none}.edition-figure-dialog{overflow:auto}.edition-figure-dialog>button{position:sticky;top:0;background:#fff;z-index:1}}
.book-play-path{margin:28px 48px 12px 58px;padding:26px;background:#edf7f5;border:1px solid #bfded9;border-radius:14px;font:15px/1.65 system-ui;color:#173f48}
.book-play-path h2{margin:8px 0;font:normal 29px/1.2 Georgia,serif}.book-play-path p{margin:12px 0}.book-play-path nav{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin:22px 0}.book-play-path nav a{display:grid;grid-template-columns:32px 1fr;gap:2px 8px;padding:13px;background:#fff;border:1px solid #c1d9d8;border-radius:8px;color:#173f48;text-decoration:none;min-width:0}.book-play-path nav a>span{grid-row:1/3;font-weight:700;color:#087f84}.book-play-path nav strong{font-size:14px;line-height:1.5;overflow-wrap:anywhere}.book-play-path nav small{font-size:12px;color:#50676d}.book-play-path nav a:hover{border-color:#087f84}.book-play-path a:focus-visible,.book-play-task button:focus-visible{outline:3px solid #087f84;outline-offset:3px}.book-play-progress{font-weight:600}.book-play-path .small{font-size:12px}
.book-play-task{scroll-margin-top:100px}.book-task-head{display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;border-bottom:1px solid #c7dcdf;padding-bottom:10px;margin-bottom:18px;font:600 11px/1.5 system-ui;letter-spacing:1px;color:#247077}.book-task-state{letter-spacing:0;font-weight:500}.book-play-task[data-check-state=correct]{border-left-color:#438249}.book-play-task[data-check-state=correct] .book-task-state{color:#28632d}.book-play-task[data-check-state=retry] .book-task-state{color:#8b4e1f}.book-play-path a[data-check-state=correct]{border-color:#438249;background:#f6fbf4}.book-play-task .feedback:not(:empty){margin-top:16px;padding:14px;border-radius:8px;background:#fff;font:15px/1.65 system-ui}.book-play-task .hint:not([hidden]){border-left:3px solid #d1a74f;background:#fff9e9;padding:12px 16px;margin-top:14px}.book-play-task .hint p{margin:0}.book-play-task .order-list{padding-left:0;list-style:none;counter-reset:step}.book-play-task .order-list li{counter-increment:step;display:grid;grid-template-columns:24px minmax(0,1fr) 44px 44px;gap:8px;align-items:center;background:#fff;border:1px solid #c8dadd;border-radius:8px;margin:10px 0;padding:10px}.book-play-task .order-list li:before{content:counter(step);font-weight:600;color:#087f84}.book-play-task .order-list li>span{min-width:0;overflow-wrap:anywhere}.book-play-task .practice-card{min-height:52px}
@media(max-width:700px){.book-play-path{margin:22px 22px 8px 28px;padding:18px}.book-play-path nav{grid-template-columns:1fr}.book-play-path h2{font-size:26px}.book-play-task .order-list li{grid-template-columns:20px minmax(0,1fr) 44px;gap:6px;padding:8px}.book-play-task .order-list li>span{grid-row:1/3;grid-column:2}.book-play-task .order-list li:before{grid-row:1/3}.book-play-task .order-list [data-up]{grid-column:3;grid-row:1}.book-play-task .order-list [data-down]{grid-column:3;grid-row:2}}