:root{--ink:#182435;--muted:#586476;--paper:#f6f7fb;--white:#fff;--line:#dce1e9;--green:#2456c6;--mint:#eaf0ff;--orange:#a44826;--soft:#fff4df;--space:clamp(20px,3vw,44px)}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;line-height:1.55;background:#f6f7fb}h1,h2,h3{font-family:inherit;font-weight:700;letter-spacing:-.035em}h1{font-size:clamp(29px,3vw,43px);line-height:1.12}h2{font-size:25px}.topbar{min-height:70px;padding:14px 28px}.brand{font-size:22px}.brand-note{display:none}.mark{background:#2456c6;border-radius:9px}.button,button{border-radius:8px;font-size:15px;gap:9px;min-height:46px}.button{background:#2456c6;border-color:#2456c6}.button:hover{background:#163d98}.design-comparison{display:flex;align-items:center;gap:14px 22px;flex-wrap:wrap;background:#172b48;color:#fff;padding:14px 28px;font-size:13px}.design-comparison>span{color:#c9d5e7}.design-comparison nav{display:flex;gap:8px;margin-left:auto;flex-wrap:wrap}.design-comparison nav a{color:#fff;text-decoration:none;padding:8px 12px;border:1px solid #75839a;border-radius:6px;min-height:40px;display:flex;align-items:center}.design-comparison a[aria-current]{background:#fff;color:#182435;border-color:#fff}.preview-app{display:grid;grid-template-columns:230px minmax(0,1fr);min-height:calc(100vh - 154px)}.preview-app:has(.focus-preview),.preview-app:has(.home-preview){grid-template-columns:1fr}.app-sidebar{background:#fff;border-right:1px solid var(--line);padding:28px 20px;display:flex;flex-direction:column;gap:12px;align-self:stretch}.all-courses{font-size:13px;text-decoration:none;padding:10px 8px}.nav-course-label{font-size:11px;text-transform:uppercase;letter-spacing:.1em;color:var(--muted);margin:15px 8px 0}.nav-course-title{font-size:17px;line-height:1.4;margin:0 8px 20px;overflow-wrap:anywhere}.app-sidebar nav{display:grid;gap:6px}.app-sidebar nav a{display:flex;align-items:center;gap:14px;padding:12px 14px;color:#4c596b;text-decoration:none;border-radius:8px;font-size:15px;font-weight:600;min-height:48px}.app-sidebar nav a>span{font:23px/1 Georgia,serif;width:23px;text-align:center}.app-sidebar nav a[aria-current]{background:#eaf0ff;color:#194cbb}.app-sidebar nav a:hover{background:#f0f3f8}.manage-course{margin-top:26px;padding:18px 8px;border-top:1px solid var(--line);font-size:13px;font-weight:600}.preview-work{padding:28px clamp(24px,4vw,64px) 70px;max-width:1350px;width:100%;margin:0 auto;min-width:0}.breadcrumbs{display:flex;align-items:center;gap:12px;font-size:12px;color:var(--muted);min-height:28px;margin-bottom:34px;flex-wrap:wrap}.breadcrumbs a{color:inherit}.section-label{font-size:11px;letter-spacing:.1em;text-transform:uppercase;font-weight:700;margin-bottom:10px;color:var(--muted)}.course-intro{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:32px;align-items:start;margin:0 0 40px}.course-intro h1{max-width:23ch;margin-bottom:15px}.course-intro>div>p:last-child{max-width:55ch;color:var(--muted);font-size:16px;margin:0}.course-count{font-size:64px;line-height:1;letter-spacing:-.065em;color:#2456c6;font-weight:750}.course-count small{display:block;font:12px/1.5 -apple-system,BlinkMacSystemFont,sans-serif;letter-spacing:0;text-align:right;margin-top:8px;color:var(--muted)}.outline-heading{display:flex;justify-content:space-between;gap:20px;align-items:baseline;margin-bottom:12px}.outline-heading h2{margin:0;font-size:20px}.outline-heading a{font-size:13px}.chapter-outline{list-style:none;margin:0;padding:0;border-top:1px solid var(--line)}.chapter-outline>li{display:grid;grid-template-columns:48px minmax(0,1fr) auto;gap:20px;padding:23px 0;align-items:start;border-bottom:1px solid var(--line)}.outline-number{font-size:28px;letter-spacing:-.05em;font-weight:400;color:#8a98ad;line-height:1.2}.chapter-outline h3{margin:0 0 7px;font-size:19px;font-weight:650;letter-spacing:-.02em}.chapter-outline h3 a{color:#182435;text-decoration:none}.chapter-outline h3 a:hover{color:#2456c6;text-decoration:underline}.chapter-outline p{font-size:14px;color:var(--muted);margin:0 0 10px;max-width:65ch}.chapter-meta{display:flex;flex-wrap:wrap;gap:7px 18px;font-size:11px;color:var(--muted)}.chapter-open{display:flex;gap:10px;align-items:center;min-height:44px;text-decoration:none;font-size:14px;font-weight:650;padding:8px 0 8px 15px;white-space:nowrap}.chapter-open>span:last-child{font-size:22px}.mobile-app-nav{display:none}.focus-preview{max-width:950px}.focus-sample{background:#fff;max-width:680px;margin:30px auto 60px;border:1px solid var(--line);border-top:5px solid #d04d35;padding:48px}.focus-sample>h1{font-size:38px}.focus-sample>p:not(.section-label){color:var(--muted)}.focus-selector{border-top:1px solid var(--line);padding:25px 0;margin:30px 0}.focus-selector label{font-size:14px;display:block;margin-bottom:10px}.focus-selector .button{margin-top:24px}.home-preview{max-width:1100px}.personal-heading h1{font-size:50px;max-width:12ch}.personal-heading>p:last-child{color:var(--muted)}.home-actions{display:grid;grid-template-columns:1.4fr 1fr;gap:45px;margin-top:40px}.home-actions>section:first-child{background:#18334b;color:#fff;padding:40px}.home-actions>section:first-child .section-label{color:#c3d4e0}.home-actions>section:first-child h2{font-size:34px;line-height:1.2}.home-actions>section:first-child .button{background:#d5ed83;color:#172b33;border-color:#d5ed83}.home-actions>section:last-child{border-top:2px solid #18334b;padding-top:25px}.home-actions p{font-size:15px}.recent-heading{margin-top:35px}.site-footer{font-size:11px}
@media(max-width:800px){.topbar{padding:12px 20px;min-height:68px}.topbar .account-name{display:none}.topbar nav{gap:14px}.design-comparison{padding:12px 20px;gap:10px}.design-comparison>span{display:none}.design-comparison nav{margin:0;width:100%;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:7px}.design-comparison nav a{font-size:11px;padding:8px;justify-content:center}.preview-app{grid-template-columns:1fr;min-height:0}.app-sidebar{display:none}.preview-work{padding:22px 22px 100px}.breadcrumbs{margin-bottom:24px}.course-intro{gap:20px;margin-bottom:30px}.course-intro h1{font-size:32px}.course-intro>div>p:last-child{font-size:15px}.course-count{font-size:46px}.course-count small{font-size:10px}.chapter-outline>li{grid-template-columns:30px minmax(0,1fr) 40px;gap:12px;padding:21px 0}.outline-number{font-size:23px}.chapter-outline h3{font-size:17px;line-height:1.4}.chapter-outline p{font-size:13px}.chapter-meta{font-size:10px;gap:7px 13px}.chapter-open{font-size:0;gap:0;justify-content:center;padding:0}.chapter-open>span:last-child{font-size:24px}.mobile-app-nav{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));position:fixed;bottom:0;left:0;right:0;z-index:10;background:#fff;border-top:1px solid var(--line);padding:5px 8px max(8px,env(safe-area-inset-bottom));box-shadow:0 -4px 20px #172b4810}.mobile-app-nav>a{display:flex;flex-direction:column;align-items:center;gap:3px;text-decoration:none;font-size:11px;color:#586476;font-weight:600;min-height:52px;justify-content:center;border-radius:8px}.mobile-app-nav>a>span{font-size:23px;line-height:1.1}.mobile-app-nav>a[aria-current]{color:#2456c6;background:#eef3ff}.site-footer{display:none}.focus-sample{padding:28px 23px;margin:10px auto 30px}.focus-sample>h1{font-size:32px}.personal-heading h1{font-size:43px}.home-actions{grid-template-columns:1fr;gap:30px;margin-top:30px}.home-actions>section:first-child{padding:28px}.outline-heading a{font-size:12px}}
@media(prefers-reduced-motion:no-preference){.chapter-outline>li{transition:background .15s ease}.chapter-outline>li:hover{background:#eef2fb}}
.chapter-heading{display:grid;grid-template-columns:90px minmax(0,1fr);gap:25px;margin-bottom:30px;align-items:start}.chapter-heading-number{font-size:82px;line-height:1;font-weight:300;letter-spacing:-.08em;color:#2456c6}.chapter-heading h1{font-size:clamp(28px,2.6vw,39px);max-width:30ch;margin-bottom:13px}.chapter-heading p:last-child{color:var(--muted);font-size:16px;max-width:60ch;margin:0}.chapter-tabs{display:flex;gap:30px;border-bottom:1px solid var(--line);margin-bottom:15px}.chapter-tabs a{display:flex;align-items:center;min-height:52px;font-size:14px;font-weight:650;color:var(--muted);text-decoration:none;border-bottom:3px solid transparent;padding:8px 0}.chapter-tabs a[aria-current]{border-color:#2456c6;color:#2456c6}.chapter-version{font-size:11px;color:var(--muted);margin-bottom:32px}.chapter-version strong{color:#945714}.chapter-reader{display:grid;grid-template-columns:190px minmax(0,1fr);gap:40px;align-items:start}.chapter-contents{position:sticky;top:22px;font-size:12px}.chapter-contents summary{font-size:12px;font-weight:650;min-height:44px;cursor:pointer}.chapter-contents ol{list-style:none;padding:0;margin:0 0 22px}.chapter-contents li{margin:0;border-bottom:1px solid var(--line)}.chapter-contents li a{display:block;padding:12px 0;color:var(--muted);text-decoration:none;line-height:1.6}.chapter-contents .button{font-size:12px;padding:10px}.chapter-text{min-width:0;max-width:75ch}.chapter-text>section{margin-bottom:35px;padding-bottom:25px;border-bottom:1px solid var(--line);scroll-margin-top:25px}.chapter-text>section>h2{font-size:25px;line-height:1.3;max-width:32ch;margin-bottom:25px}.chapter-text .typeset-source{font:18px/1.85 Georgia,serif;color:#283547}.chapter-text .typeset-source li{margin:10px 0}.reading-check{margin:25px 0;padding:18px 22px;border-left:3px solid #2456c6;background:#edf2ff;font-size:14px}.reading-check strong{font-size:12px}.reading-check p{margin:7px 0 0}.chapter-source{font-size:11px;line-height:1.7}.chapter-source summary{min-height:44px;display:flex;align-items:center;cursor:pointer;color:var(--muted)}.preview-diagram{margin:30px 0}.preview-diagram .relationship-explorer,.preview-diagram .sequence-explorer{background:#eef2fa;border-color:#2456c6;margin-bottom:30px}.preview-diagram figcaption h3{font-family:inherit;font-size:27px}.preview-diagram .relationship-workspace{grid-template-columns:1fr}.preview-diagram .relationship-map{max-width:280px;margin:0 auto}.preview-diagram .relationship-labels{display:grid;grid-template-columns:1fr 1fr;gap:0 18px}.preview-diagram .reading-explorer{min-width:0}.chapter-section-heading{max-width:65ch;margin:25px 0}.chapter-section-heading h2{font-size:25px}.chapter-section-heading p{font-size:15px;color:var(--muted)}.activity-options>article{display:grid;grid-template-columns:130px minmax(0,1fr);gap:25px;padding:24px 0;border-top:1px solid var(--line)}.activity-type{font-size:12px;color:#2456c6;font-weight:650;padding-top:4px}.activity-options h3{font-size:20px;margin-bottom:8px}.activity-options p{font-size:14px;max-width:65ch;color:var(--muted);margin-bottom:13px}.activity-options a{font-size:14px;font-weight:650}.saved-activity{margin-left:25px}.locked-activity{font-size:12px;color:var(--muted)}.chapter-additional{margin-top:35px;padding-top:30px;border-top:2px solid var(--line)}.chapter-additional p{font-size:14px;color:var(--muted)}.chapter-additional .actions>a{font-size:14px}.explain-layout{display:grid;grid-template-columns:1.5fr 1fr;gap:50px;margin-top:35px}.explain-layout h2{font-size:30px}.explain-layout p{font-size:15px;line-height:1.8}.explain-layout blockquote{margin:30px 0;padding:22px 25px;background:#eaf0ff;border-left:3px solid #2456c6;font-size:17px;line-height:1.8}.explain-layout>aside{border-left:1px solid var(--line);padding-left:30px;font-size:13px}.explain-layout li{margin-bottom:20px}.explain-layout>aside p{font-size:12px;color:var(--muted)}.resource-outline>a{display:grid;grid-template-columns:130px minmax(0,1fr) auto;gap:25px;align-items:center;border-top:1px solid var(--line);padding:24px 0;text-decoration:none}.resource-outline>a>span{font-size:11px;color:var(--muted)}.resource-outline>a>strong{font-size:16px;font-weight:600}.preview-work p,.preview-work h1,.preview-work h2,.preview-work h3{overflow-wrap:anywhere}
@media(max-width:1100px){.chapter-reader{grid-template-columns:1fr}.chapter-contents{position:static}.chapter-contents details{border-bottom:1px solid var(--line)}.chapter-contents ol{display:grid;grid-template-columns:1fr 1fr;gap:0 22px}.chapter-contents .button{display:none}.chapter-text{max-width:75ch}.explain-layout{gap:28px}}
@media(max-width:800px){.chapter-heading{grid-template-columns:42px minmax(0,1fr);gap:17px;margin-bottom:22px}.chapter-heading-number{font-size:40px;line-height:1.1}.chapter-heading h1{font-size:27px;line-height:1.2}.chapter-heading .section-label{font-size:10px;margin-bottom:8px}.chapter-heading p:last-child{font-size:14px}.chapter-tabs{justify-content:space-between;gap:10px}.chapter-tabs a{font-size:13px;min-height:48px}.chapter-version{line-height:1.7;margin-bottom:24px}.chapter-reader{gap:25px}.chapter-contents ol{grid-template-columns:1fr}.chapter-contents details:not([open]){margin-bottom:10px}.chapter-text>section>h2{font-size:24px}.chapter-text .typeset-source{font-size:18px}.activity-options>article{grid-template-columns:1fr;gap:8px}.activity-type{font-size:11px}.activity-options h3{font-size:20px}.activity-options a{min-height:44px;display:inline-flex;align-items:center}.saved-activity{margin-left:0;display:block!important}.explain-layout{grid-template-columns:1fr;gap:35px;margin-top:25px}.explain-layout h2{font-size:28px}.explain-layout>aside{border-left:0;border-top:1px solid var(--line);padding:25px 0 0}.resource-outline>a{grid-template-columns:1fr;gap:8px;padding:21px 0}.resource-outline>a>span{font-size:12px}.reading-check{padding:17px 18px}.reading-check p{font-size:14px}.preview-diagram .relationship-labels{grid-template-columns:1fr}}
/* Shared application shell. A single hierarchy governs learner and creator pages. */
.course-app .topbar{position:relative;z-index:20;min-height:70px}.course-app>.app-sidebar{position:fixed;top:70px;bottom:0;left:0;width:230px;overflow:auto;z-index:5}.course-app>main{margin-left:230px;min-height:calc(100vh - 140px)}.course-app>.site-footer,.course-app>.messages{margin-left:230px}.course-app .lodge{max-width:1290px;padding:28px clamp(24px,4vw,56px) 70px}.course-app .page{margin:28px auto;padding:0 clamp(24px,4vw,56px)}.course-app .reading{max-width:1000px;padding:28px clamp(24px,4vw,56px) 70px}.course-app .lodge-heading{margin:18px 0 30px}.course-app .lodge-heading h1{font-size:38px;font-family:inherit;font-weight:700;line-height:1.15}.course-app .lodge-heading>p:not(.eyebrow){font-size:16px;max-width:65ch}.course-app .desk-context h2,.course-app .activity-path h2,.course-app .creator-starts h2,.course-app .task-sheet h1{font-family:inherit;font-weight:700}.course-app .task-sheet h1{font-size:32px}.course-app .preview-notice{border:1px solid #ead7b5;background:#fff7e8;border-radius:7px;padding:11px 16px;margin:0 0 25px;font-size:12px}.preview-notice summary{cursor:pointer;min-height:28px;line-height:1.6}.preview-notice p{margin:10px 0 0;max-width:75ch}.course-app .edition-update{background:#edf2ff;border-left-color:#2456c6;margin:0 0 24px;font-size:12px}.app-sidebar .manage-course{display:flex;align-items:center;gap:12px}.app-sidebar .manage-course[aria-current]{background:#eaf0ff;padding:14px 8px;border-radius:6px}.course-app .chapter-heading:not(:has(.chapter-heading-number)){grid-template-columns:minmax(0,1fr)}.chapter-search{margin:22px 0 25px}.chapter-search>label{display:block;font-size:12px;margin-bottom:8px;color:var(--muted)}.chapter-search>div{display:flex;gap:10px;align-items:center;max-width:570px}.chapter-search input{min-width:0}.chapter-search a{font-size:13px}.chapter-search-empty{grid-template-columns:1fr!important}.additional-topics{margin-top:40px;padding-top:25px;border-top:2px solid var(--line)}.additional-topics>h2{font-size:22px}.additional-topics article{padding:20px 0;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:25px;justify-content:space-between}.additional-topics h3{font-size:17px;margin:0}.additional-topics span{font-size:11px;color:var(--muted)}.mobile-management{display:none}.course-app .reading-spread{margin:26px 0 40px;padding-top:0;border-top:0}.course-app .reading-opening{margin-bottom:26px;gap:30px}.course-app .reading-opening-text{display:block}.course-app .reading-opening-text>div{display:block}.course-app .reading-deck{font:16px/1.8 -apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;max-width:70ch}.course-app .reading-opening>div>a{font-size:13px;margin-top:0}.course-app .chapter-source-reading{margin:0 0 30px;padding:18px 0;gap:24px}.course-app .chapter-source-reading h3{font-family:inherit;font-size:19px;margin-bottom:10px}.course-app .chapter-source-reading p:not(.eyebrow){font-size:13px;line-height:1.8;margin-bottom:0;max-width:65ch}.course-app .chapter-source-reading>a{font-size:12px;background:#eaf0ff}.course-app .reading-story{grid-template-columns:185px minmax(0,1fr);gap:36px}.course-app .reading-index{top:24px;border-top:0;padding-top:0;font-size:12px}.course-app .reading-index>a{font-size:12px}.course-app .reading-chapter h3{font-family:inherit;font-size:26px;line-height:1.3;max-width:35ch;letter-spacing:-.025em;font-weight:650}.course-app .reading-prose{font-size:18px}.course-app .reading-section-number{font-size:10px;color:#62718a;margin-bottom:10px}.course-app .reading-margin{background:#edf2ff;border-color:#2456c6;padding:15px 20px;margin:24px 0}.course-app .reading-margin>span{color:#2456c6}.course-app .reading-margin p{font:15px/1.7 -apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;margin:8px 0 0}.course-app .reading-to-practice{padding:25px 0 0;margin-top:25px;border-top:1px solid var(--line)}.course-app .reading-to-practice h2{font-family:inherit;font-size:26px;font-weight:650}.course-app .reading-to-practice>p:not(.eyebrow){font:15px/1.8 -apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif}.course-app .relationship-explorer,.course-app .sequence-explorer{background:#edf2fa;border-color:#2456c6}.course-app .relationship-explorer figcaption h3,.course-app .sequence-explorer figcaption h3{font-family:inherit;font-size:27px}.course-app .relationship-workspace{grid-template-columns:1fr}.course-app .relationship-map{max-width:270px;margin:0 auto}.course-app .relationship-labels{display:grid;grid-template-columns:1fr 1fr;gap:0 15px}.course-app .reading-photograph img{max-height:310px}.course-app .memory-hook{background:#edf2ff;border-color:#2456c6;font-size:14px}.practice-picker{max-width:760px;background:#fff;border:1px solid var(--line);border-radius:10px;padding:30px;margin:26px 0}.practice-picker>label,.practice-picker legend{font-size:14px;font-weight:650;display:block;margin-bottom:12px}.practice-picker>select{margin-bottom:30px}.method-options{display:grid;gap:10px}.method-options label{display:flex;align-items:flex-start;gap:14px;padding:15px 18px;border:1px solid var(--line);border-radius:7px;cursor:pointer;font-weight:400}.method-options label:has(input:checked){background:#edf2ff;border-color:#2456c6}.method-options input{margin-top:5px}.method-options strong{font-size:15px;display:block;margin-bottom:5px}.method-options small{display:block;font-size:13px;color:var(--muted);line-height:1.6}.practice-picker>p{margin:18px 0 0}.practice-review-link{display:flex;align-items:center;justify-content:space-between;gap:25px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:22px 0;max-width:760px}.practice-review-link h2{font-size:21px;margin-bottom:7px}.practice-review-link p{font-size:13px;color:var(--muted);margin:0}.practice-review-link>a{font-size:14px;font-weight:650;white-space:nowrap}.long-practice{max-width:760px;margin:35px 0;font-size:14px}.long-practice summary{font-weight:650;min-height:44px;cursor:pointer}.course-app .atlas-unit{grid-template-columns:250px minmax(0,1fr);gap:35px}.course-app .atlas-goal h2{font-family:inherit;font-size:25px;font-weight:650}.course-app .room-heading h1{font-size:38px}.course-app .room-course-material{display:none}.class-course-link{font-size:13px;padding:12px 0 22px;border-bottom:1px solid var(--line)}.course-app .unit-chapter-footer{font-size:12px}.course-app .task-sheet{border-top:3px solid #2456c6;border-radius:8px}.course-app .task-prompt{font-size:17px}.course-app .practice-shell{margin-top:28px}.course-app .question-title{font-size:29px}.course-app .review-chapter-filter{align-items:end}.course-app .chapter-reading{background:#edf2ff}.course-app 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