:root{--ink:#17243e;--muted:#637085;--blue:#2b45de;--line:#e2e7ee;--paper:#fbfcfe;--lime:#dfff82;--radius:20px;font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none;line-height:1.5;scroll-behavior:smooth}*{box-sizing:border-box}body{margin:0}a{color:inherit;text-decoration:none}button,input,textarea,select{font:inherit}a,button,input,textarea,select{-webkit-tap-highlight-color:transparent}a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:3px solid #6986ff;outline-offset:4px}button,a{touch-action:manipulation}button{cursor:pointer}button:disabled{opacity:.6;cursor:wait}img{max-width:100%}h1,h2,h3,p{margin-top:0}h1,h2,h3{line-height:1.13;letter-spacing:-.04em}p{color:var(--muted)}h1{font-size:clamp(2.5rem,5.8vw,5.25rem);font-weight:750}h2{font-size:clamp(1.9rem,3vw,2.8rem);font-weight:700}h3{font-size:1.4rem;font-weight:700}main{min-height:65vh}.site-header{background:#fff;border-bottom:1px solid var(--line)}.nav-wrap{max-width:1240px;margin:auto;padding:25px 34px;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{display:flex;gap:12px;align-items:center;font-size:23px;font-weight:750;letter-spacing:-.9px;line-height:1.15}.brand-plus{color:var(--blue)}.brand small{display:block;font-size:7px;letter-spacing:1.1px;font-weight:700;margin-top:7px;color:var(--muted)}.brand-mark{width:48px;height:48px;border-radius:13px;background:var(--blue);color:#fff;display:grid;place-content:center;position:relative;font-size:35px}.brand-mark span{color:var(--lime);font-size:25px;position:absolute;right:3px;top:-1px}.nav-wrap nav{display:flex;gap:32px;align-items:center;font-size:13px;font-weight:650}.nav-admin{padding:10px 15px;border:1px solid var(--line);border-radius:8px}.nav-admin span{margin-left:15px}.hero{max-width:1240px;margin:auto;padding:72px 34px 80px;display:grid;grid-template-columns:1.1fr 1fr;gap:40px;align-items:center;overflow:hidden}.eyebrow{display:block;font-size:10px;letter-spacing:1.8px;font-weight:750;color:var(--blue);margin-bottom:20px}.little-plus{background:#eaf0ff;border-radius:100%;padding:3px 8px;font-size:15px;margin-right:8px}.hero h1{margin:22px 0 24px}.hero h1>span{color:var(--blue)}.hero-copy>p{font-size:17px;line-height:1.8;margin-bottom:28px}.button{display:inline-flex;align-items:center;justify-content:center;gap:22px;background:var(--blue);color:#fff;padding:14px 21px;border:1px solid var(--blue);border-radius:9px;font-size:13px;font-weight:650;line-height:1.4;transition:background .15s,transform .15s}.button:hover{background:#1932bd;transform:translateY(-1px)}.button.secondary{background:#fff;color:var(--ink);border-color:var(--line)}.button.secondary:hover{background:#f0f3fa}.button.small{padding:8px 12px;font-size:12px;gap:8px}.button.danger{color:#a62636;border-color:#edc4ca;background:#fff4f5}.hero-note{margin-top:24px;font-size:11px;color:var(--muted)}.hero-note span{color:var(--blue);font-size:20px;vertical-align:middle;margin-right:7px}.hero-art{height:405px;position:relative;display:grid;place-items:center}.hero-tile{width:290px;height:320px;background:var(--blue);border-radius:32px;transform:rotate(-8deg);padding:28px;display:flex;flex-direction:column;align-items:center;justify-content:space-between;color:#fff;box-shadow:18px 20px 0 #e2e9ff;position:relative;z-index:2}.tile-label{font-size:8px;letter-spacing:2px;align-self:flex-start;color:#d7e2ff}.big-a{font-size:170px;letter-spacing:-20px;font-weight:800;line-height:1.1;position:relative;padding-right:25px}.big-a span{font-size:90px;color:var(--lime);position:absolute;right:-13px;top:-15px}.tile-bottom{font-size:9px;color:#d7e2ff;letter-spacing:.2px}.orbit{position:absolute;border:1px solid #d8e1f4;border-radius:50%;width:440px;height:270px;transform:rotate(-35deg)}.orbit-two{transform:rotate(35deg);height:340px;width:440px}.formula{position:absolute;z-index:3;background:white;padding:13px 19px;border:1px solid var(--line);box-shadow:0 8px 22px #23335909;font-family:Georgia,serif;font-style:italic;border-radius:11px}.formula-one{top:22px;right:0;transform:rotate(8deg);font-size:18px}.formula-two{bottom:15px;left:2px;transform:rotate(-4deg);font-size:22px}.float-symbol{position:absolute;font-size:45px}.symbol-one{left:0;top:35px;color:var(--blue);transform:rotate(-15deg)}.symbol-two{right:3px;bottom:65px;color:#ea9750}.spark{position:absolute;font-size:45px;right:10px;top:135px;color:#b7db65}.subjects-section{border-top:1px solid var(--line);max-width:1172px;padding:52px 0 64px;margin:auto;scroll-margin-top:25px}.section-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px}.section-heading h2{margin:0}.section-heading .eyebrow{margin-bottom:14px}.section-heading p{font-size:13px;margin:0;line-height:1.7}.subject-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:22px}.subject-card{background:white;border:1px solid var(--line);border-radius:17px;overflow:hidden;transition:transform .2s,box-shadow .2s}.subject-card:hover{transform:translateY(-6px);box-shadow:0 15px 30px #13245e0d}.card-art{aspect-ratio:1;position:relative;overflow:hidden;display:grid;place-items:center;background:var(--art-bg)}.blue{--art-bg:#eaf0ff;--art-ink:#3f5cce}.purple{--art-bg:#efe9fc;--art-ink:#8766bd}.green{--art-bg:#e6f2e7;--art-ink:#548f67}.orange{--art-bg:#fff0dd;--art-ink:#d9943d}.pink{--art-bg:#fce8ef;--art-ink:#ba6488}.teal{--art-bg:#e0f4f2;--art-ink:#358c89}.math-icon{font-size:72px;font-family:Georgia,serif;font-style:italic;color:var(--art-ink);position:relative;z-index:1;letter-spacing:-5px}.art-grid{position:absolute;inset:0;background-image:linear-gradient(#ffffff60 1px,transparent 1px),linear-gradient(90deg,#ffffff60 1px,transparent 1px);background-size:27px 27px;transform:rotate(-15deg) scale(1.4)}.card-art:after{content:"";position:absolute;width:135px;height:135px;border:1px solid var(--art-ink);opacity:.2;border-radius:50%;transform:rotate(-20deg) scaleX(1.3)}.card-art img{width:100%;height:100%;object-fit:cover;position:absolute;z-index:1}.card-index{position:absolute;left:18px;top:14px;color:var(--art-ink);font-size:10px;z-index:2;font-weight:650;background:#ffffffa0;border-radius:4px;padding:2px 5px}.card-arrow{position:absolute;right:14px;bottom:14px;z-index:2;background:#ffffffb0;width:30px;height:30px;border-radius:50%;display:grid;place-items:center;color:var(--art-ink)}.card-copy{padding:22px}.card-copy h3{font-size:21px;margin-bottom:11px}.card-copy p{font-size:12px;line-height:1.75;min-height:64px;overflow-wrap:anywhere;margin-bottom:17px}.lesson-count{font-size:10px;font-weight:650;color:var(--muted);display:flex;justify-content:space-between;padding-top:15px;border-top:1px solid var(--line)}.learning-strip{max-width:1172px;margin:0 auto 70px;padding:36px 40px;display:flex;gap:30px;align-items:center;border-radius:20px;background:#f0f3fa}.learning-strip h2{font-size:25px;margin-bottom:0}.learning-strip .eyebrow{font-size:8px;margin-bottom:12px}.strip-art{font-family:Georgia,serif;font-size:76px;color:var(--blue);line-height:1}.learning-strip>a{margin-left:auto;font-size:12px;font-weight:650}.learning-strip>a span{margin-left:20px}footer{background:#fff;border-top:1px solid var(--line);max-width:none;padding:28px max(34px,calc((100% - 1172px)/2));display:flex;align-items:center;gap:25px;font-size:10px}footer p{margin:0}footer small{margin-left:auto;color:var(--muted);font-size:9px}.footer-brand{font-weight:750;font-size:16px;letter-spacing:-.7px}.footer-brand span{color:var(--blue)}.content-wrap,.admin-wrap{max-width:1172px;margin:0 auto;padding:35px 0 75px}.back-link{display:inline-block;color:var(--muted);font-size:13px;margin:0 0 28px}.back-link:hover{color:var(--blue)}.subject-intro{display:flex;align-items:center;justify-content:space-between;gap:40px;margin:10px 0 55px}.subject-intro h1{font-size:clamp(2.6rem,5vw,4rem);margin-bottom:20px}.subject-intro p{max-width:640px;font-size:18px}.subject-badge{width:190px;height:190px;flex-shrink:0;border-radius:28px;background:var(--art-bg);display:grid;place-items:center;position:relative;overflow:hidden}.subject-badge img{width:100%;height:100%;object-fit:cover}.pill{display:inline-block;background:#ecf0ff;color:var(--blue);font-size:12px;padding:6px 12px;border-radius:99px}.lesson-list{border:1px solid var(--line);border-radius:18px;overflow:hidden;background:white}.lesson-row{padding:25px;display:flex;gap:25px;align-items:center;border-bottom:1px solid var(--line)}.lesson-row:last-child{border:0}.lesson-row:hover{background:#f5f7ff}.lesson-row h3{font-size:20px;margin-bottom:8px}.lesson-row p{font-size:13px;margin-bottom:0}.lesson-number{display:grid;place-items:center;background:#eef1fb;color:var(--blue);width:44px;height:44px;border-radius:12px;font-size:14px;flex-shrink:0}.lesson-time{margin-left:auto;color:var(--muted);white-space:nowrap;font-size:12px}.row-arrow{font-size:25px;color:var(--blue)}.lesson-layout{display:grid;grid-template-columns:235px 1fr;gap:65px;padding-top:45px}.lesson-layout aside h2{font-size:18px;margin:15px 0}.lesson-layout aside nav{display:flex;flex-direction:column;gap:8px}.lesson-layout aside nav a{padding:12px;font-size:13px;border-radius:8px}.lesson-layout aside nav a[aria-current]{background:#eaf0ff;color:var(--blue);font-weight:650}.lesson-content{max-width:760px;min-width:0}.lesson-content h1{font-size:clamp(2.2rem,4vw,3.3rem)}.lead{font-size:19px;line-height:1.7}.prose{font-size:17px;line-height:1.9;overflow-wrap:anywhere}.prose h2{font-size:27px;margin-top:40px}.prose h3{font-size:23px;margin-top:30px}.prose h4{font-size:20px;margin-top:25px}.prose p{white-space:normal;color:#45536b}.video-wrap{aspect-ratio:16/9;margin:28px 0;background:#15213b;border-radius:16px;overflow:hidden}.video-wrap iframe{width:100%;height:100%;border:0}.lesson-pagination{display:flex;justify-content:space-between;gap:15px;border-top:1px solid var(--line);padding-top:25px;margin-top:40px}.empty{text-align:center;padding:65px 24px;border:1px dashed var(--line);border-radius:18px}.empty h1{font-size:32px}.empty h3{font-size:24px}.empty p{margin-bottom:0}.skip{position:absolute;top:-100px;left:15px;background:white;z-index:100;padding:12px}.skip:focus{top:10px}.auth-card{max-width:480px;padding:38px;background:white;border:1px solid var(--line);border-radius:20px;margin:65px auto}.auth-card h1{font-size:38px}.auth-card p{font-size:14px}label{font-size:13px;font-weight:650;display:block;margin:0 0 20px}input:not([type=checkbox]),textarea,select{display:block;border:1px solid #ccd4e1;background:#fff;border-radius:8px;padding:12px;width:100%;margin-top:8px;color:var(--ink);font-size:15px}textarea{resize:vertical;line-height:1.6}input[type=file]{font-size:12px;padding:10px}label small,.form-help{display:block;color:var(--muted);font-size:11px;font-weight:400;margin-top:9px;line-height:1.7}.check{display:flex;align-items:center;gap:10px}.check input{width:18px;height:18px;accent-color:var(--blue)}.notice{background:#edf5e7;border:1px solid #d0e3be;color:#365923;border-radius:10px;padding:15px 20px;max-width:1172px;margin:20px auto;font-size:14px}.error{background:#fff0f2;border:1px solid #f2bdc8;padding:15px;border-radius:10px;color:#a22640;font-size:14px}.admin{background:#f5f7fb}.admin-top{display:flex;justify-content:space-between;align-items:center;gap:25px;margin:10px 0 30px}.admin-top h1{font-size:40px;margin-bottom:15px}.admin-top p{font-size:14px;margin:0}.admin-top .eyebrow{margin-bottom:15px}.admin-tabs{display:flex;gap:28px;border-bottom:1px solid var(--line);margin-bottom:35px;font-size:13px}.admin-tabs a{padding:0 0 15px;color:var(--muted)}.admin-tabs a[aria-current]{border-bottom:2px solid var(--blue);color:var(--blue)}.admin-tabs a:last-child{margin-left:auto}.manage-list{display:grid;gap:18px}.manage-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:25px;display:flex;align-items:center;justify-content:space-between;gap:30px}.manage-identity{display:flex;gap:22px;align-items:center;min-width:0}.manage-identity>div:last-child{min-width:0}.manage-identity h3{margin:8px 0;font-size:22px;overflow-wrap:anywhere}.manage-identity p{font-size:12px;max-width:450px;margin-bottom:10px;overflow-wrap:anywhere}.manage-identity a{color:var(--blue);font-size:12px;font-weight:650}.mini-art{width:85px;height:85px;flex-shrink:0;background:var(--art-bg);color:var(--art-ink);font-family:Georgia,serif;font-size:35px;display:grid;place-items:center;border-radius:14px}.status{font-size:9px;text-transform:uppercase;letter-spacing:1px;color:var(--muted);font-weight:700}.status.live{color:#2a7a49}.status:before{content:'●';margin-right:5px}.manage-actions{display:flex;gap:7px;max-width:285px;flex-wrap:wrap;justify-content:flex-end;flex-shrink:0}.inline-form{display:inline-flex;margin:0}.panel{background:white;border:1px solid var(--line);border-radius:16px;padding:30px;margin-bottom:25px}.panel h2{font-size:28px}.panel h3{font-size:22px}.narrow{max-width:600px}.editor-form{display:grid;grid-template-columns:minmax(0,1fr) 250px;gap:45px}.editor-side{border-left:1px solid var(--line);padding-left:28px}.editor-side h3{font-size:21px}.editor-side p{font-size:13px}.editor-side .button{width:100%;margin:10px 0 18px}.editor-side>a{display:block;font-size:12px;text-align:center}.field-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}.image-preview{width:140px;height:140px;object-fit:cover;border-radius:12px;margin-bottom:16px}.manage-row{display:flex;align-items:center;justify-content:space-between;border-top:1px solid var(--line);padding:20px 0;gap:20px}.delete-confirm{border-color:#edc4ca}.delete-confirm .button{margin-right:12px}
@media(min-width:1400px){.hero{padding-top:90px;padding-bottom:95px}}@media(max-width:1239px){.subjects-section,.learning-strip{margin-left:34px;margin-right:34px}.content-wrap,.admin-wrap{padding-left:34px;padding-right:34px}.subject-grid{gap:16px}.card-copy{padding:18px}.hero-art{transform:scale(.9)}.manage-card{gap:15px}.manage-actions{max-width:220px}.notice{margin-left:34px;margin-right:34px}}@media(max-width:950px){.hero{gap:0}.hero-art{transform:scale(.77);margin-left:-10px}.hero h1{font-size:60px}.subject-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}.card-copy p{min-height:auto}.card-art{max-height:none}.learning-strip{gap:20px;padding:30px}.learning-strip h2{font-size:21px}.learning-strip>a{max-width:130px}.manage-card{align-items:flex-start;flex-direction:column}.manage-actions{max-width:none;justify-content:flex-start;margin-left:107px}.editor-form{grid-template-columns:1fr 220px;gap:25px}.lesson-layout{gap:30px;grid-template-columns:190px 1fr}footer{flex-wrap:wrap}footer small{margin-left:0}.formula-one{right:-20px}}@media(max-width:640px){.nav-wrap{padding:20px}.brand{font-size:20px}.brand-mark{width:40px;height:40px;font-size:29px;border-radius:11px}.brand small{font-size:5.7px;letter-spacing:.8px}.nav-wrap nav{gap:0}.nav-wrap nav>a:first-child{display:none}.nav-admin{font-size:11px;padding:9px}.nav-admin span{margin-left:5px}.hero{padding:42px 22px 30px;grid-template-columns:1fr}.hero .eyebrow{font-size:8px;letter-spacing:1.2px}.hero h1{font-size:58px;margin:20px 0}.hero-copy>p{font-size:15px}.hero-art{height:340px;transform:scale(.82);margin:20px -20px 0}.hero-tile{height:300px;width:275px}.formula-one{right:0}.formula-two{left:0}.symbol-one{left:8px}.symbol-two{right:15px}.spark{right:20px}.orbit{width:370px}.subjects-section{margin:0 22px;padding:35px 0}.section-heading{align-items:flex-start;gap:20px;flex-direction:column;margin-bottom:25px}.section-heading h2{font-size:29px}.section-heading .eyebrow{font-size:8px;letter-spacing:1.1px}.section-heading>p{display:none}.subject-grid{gap:14px}.card-copy{padding:15px}.card-copy h3{font-size:19px}.card-copy p{font-size:11px;line-height:1.7;min-height:75px}.math-icon{font-size:52px}.card-art:after{width:100px;height:100px}.card-index{left:10px;top:9px;font-size:8px}.card-arrow{width:25px;height:25px;right:10px;bottom:10px}.lesson-count{font-size:9px}.learning-strip{margin:0 22px 40px;padding:25px;display:block}.strip-art{display:none}.learning-strip h2{font-size:22px;margin-bottom:20px}.learning-strip>a{font-size:12px}.content-wrap,.admin-wrap{padding:25px 22px 45px}.subject-intro{gap:20px;margin-bottom:35px}.subject-intro h1{font-size:35px}.subject-intro p{font-size:14px}.subject-badge{width:95px;height:110px;border-radius:18px}.subject-badge .math-icon{font-size:38px}.lesson-row{gap:12px;padding:20px 15px}.lesson-row h3{font-size:18px}.lesson-row p{font-size:12px}.lesson-time{display:none}.lesson-number{width:34px;height:36px}.row-arrow{margin-left:auto}.lesson-layout{display:flex;flex-direction:column}.lesson-layout aside{border-bottom:1px solid var(--line);padding-bottom:15px}.lesson-layout aside nav{display:none}.lesson-layout aside h2{display:none}.lesson-layout .back-link{margin:0}.lesson-content h1{font-size:36px}.lead{font-size:16px}.prose{font-size:16px}.prose h2{font-size:24px}.lesson-pagination{flex-wrap:wrap}.auth-card{margin:30px 22px;padding:28px}.auth-card h1{font-size:32px}.admin-top{align-items:flex-start;gap:10px}.admin-top h1{font-size:29px}.admin-top p{font-size:12px}.admin-top .eyebrow{font-size:8px}.admin-tabs{gap:20px;font-size:11px}.admin-tabs a:last-child{margin-left:0}.manage-card{padding:20px}.manage-identity{gap:15px}.mini-art{width:55px;height:65px;font-size:27px}.manage-identity h3{font-size:20px}.manage-actions{margin-left:0;gap:6px}.button.small{font-size:11px;padding:8px 10px}.editor-form{display:block}.editor-side{border-left:0;border-top:1px solid var(--line);padding:25px 0 0}.panel{padding:22px}.panel h2{font-size:25px}.field-grid{grid-template-columns:1fr}.notice{margin:15px 22px;font-size:12px}.admin-wrap .notice{margin-left:0;margin-right:0}footer{padding:25px 22px;display:block}footer p{margin:9px 0}footer small{font-size:8px}.manage-row{align-items:flex-start}.manage-row strong{overflow-wrap:anywhere;min-width:0}}@media(prefers-reduced-motion:reduce){:root{scroll-behavior:auto}*{transition:none!important}}
/* The full subject tile stays square, including its title and description. */
.subject-card{aspect-ratio:1;display:grid;grid-template-rows:43% 57%}.card-art{aspect-ratio:auto;min-height:0}.card-copy{padding:16px 18px;display:flex;flex-direction:column;min-height:0}.card-copy h3{font-size:20px;margin-bottom:8px}.card-copy p{font-size:11px;line-height:1.6;min-height:0;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}.lesson-count{margin-top:auto;padding-top:8px}.card-art .math-icon{font-size:58px}.card-art:after{width:85px;height:85px}.card-index{top:10px;left:12px}.card-arrow{width:24px;height:24px;right:10px;bottom:10px}@media(min-width:641px) and (max-width:950px){.card-copy{padding:23px}.card-copy h3{font-size:25px}.card-copy p{font-size:14px}.lesson-count{font-size:11px}.card-art .math-icon{font-size:72px}}@media(max-width:640px){.subject-grid{grid-template-columns:1fr;gap:22px}.card-copy{padding:22px}.card-copy h3{font-size:25px}.card-copy p{font-size:13px;margin-bottom:12px}.lesson-count{font-size:11px;padding-top:12px}.card-art .math-icon{font-size:65px}}
/* Reference introduction and administrator-curated video feed. */
.reference-intro{padding-top:42px;padding-bottom:42px;grid-template-columns:1.3fr 1fr;gap:45px}.reference-intro h1{font-size:36px;line-height:1.2;margin:0 0 22px}.reference-intro .hero-copy>p{font-size:15px;line-height:1.9;margin:0;color:#45536b}.reference-intro .hero-art{height:360px;transform:scale(.85)}.reference-intro .hero-tile{justify-content:center}.video-feed{max-width:1172px;margin:0 auto 65px;scroll-margin-top:25px}.video-feed h2{font-size:30px}.feed-entry{background:#fff;border:1px solid var(--line);border-radius:17px;padding:28px;margin-bottom:20px}.feed-entry-heading{display:flex;align-items:center;gap:15px;margin-bottom:16px}.feed-subject{font-size:12px;color:var(--blue);font-weight:650}.entry-type{font-size:10px;text-transform:uppercase;letter-spacing:1px;color:var(--muted);border:1px solid var(--line);border-radius:5px;padding:3px 7px}.feed-entry>h3{font-size:25px;margin-bottom:15px}.feed-summary{font-size:14px;line-height:1.7}.feed-notes{padding:18px 20px;background:#f5f7fc;border-radius:10px;margin:20px 0}.feed-notes>h4{font-size:12px;margin:0 0 12px;color:var(--muted)}.feed-notes .prose{font-size:14px;line-height:1.8}.feed-notes .prose p:last-child{margin-bottom:0}.feed-notes .prose h2{font-size:21px;margin-top:20px}.feed-notes .prose h3{font-size:19px}.feed-actions{display:flex;align-items:center;gap:20px;flex-wrap:wrap;font-size:12px}.source-host{color:var(--muted);margin-left:auto}.source-url{font-size:12px;margin-top:12px;overflow-wrap:anywhere}.feed-pagination{display:flex;justify-content:space-between;gap:15px}.subject-feed{max-width:900px}.entry-notes{margin-top:30px}.entry-notes>h2{font-size:25px}.admin-top h1{font-size:36px}@media(max-width:1239px){.video-feed{margin-left:34px;margin-right:34px}}@media(max-width:950px){.reference-intro{grid-template-columns:1.4fr 1fr;gap:0}.reference-intro h1{font-size:32px}.reference-intro .hero-art{transform:scale(.65);margin-left:-30px}}@media(max-width:640px){.reference-intro{grid-template-columns:1fr;padding:35px 22px 25px}.reference-intro h1{font-size:30px}.reference-intro .hero-copy>p{font-size:14px;line-height:1.85}.reference-intro .hero-art{transform:scale(.8);height:320px;margin:20px -20px 0}.video-feed{margin:0 22px 45px}.video-feed h2{font-size:26px}.feed-entry{padding:22px}.feed-entry>h3{font-size:22px}.feed-actions{gap:15px}.source-host{width:100%;margin:0}.feed-notes{padding:15px}.admin-top h1{font-size:29px}}
.sort-help{font-size:12px;margin-bottom:4px}.sort-status{font-size:12px;min-height:20px;color:var(--blue);margin-bottom:16px}.sort-handle{border:1px solid var(--line);background:#f8faff;color:var(--muted);width:34px;min-width:34px;height:46px;border-radius:9px;display:grid;place-items:center;font-size:26px;cursor:grab;touch-action:none;user-select:none}.sort-handle:active{cursor:grabbing}.sort-handle:hover{color:var(--blue);border-color:#9caef2}.manage-card.dragging{outline:2px solid var(--blue);background:#eef2ff;box-shadow:0 10px 25px #23335920}.sorting{user-select:none}.sortable[aria-busy=true]{opacity:.8}.admin-tabs{flex-wrap:wrap;row-gap:12px}@media(max-width:640px){.sortable .manage-identity{gap:10px}.sort-handle{width:28px;min-width:28px;height:40px}.sortable .mini-art{width:42px;height:55px;font-size:23px}.admin-tabs{gap:15px}.admin-tabs a:last-child{margin-left:0}.manage-actions{margin-left:0}}
.creator-credit{font-size:13px;margin:0 0 18px}.creator-credit a,.creator-resources a{color:var(--blue);text-decoration:underline;text-underline-offset:3px}.creator-resources{font-size:12px;margin:20px 0 0}.lesson-content .creator-resources{margin:20px 0}
.material-gate{border:1px solid var(--line);background:#fff;border-radius:17px;padding:30px}.material-gate h3{font-size:24px}.material-gate p{font-size:14px}.gate-actions{display:flex;gap:12px;flex-wrap:wrap}.account-links{display:flex;gap:18px;flex-wrap:wrap;font-size:12px;color:var(--blue);margin-top:25px}.account-links a:hover{text-decoration:underline}.member-account .error{margin-top:20px}.account-logout{margin-top:25px}.password-settings{margin-top:30px;border-top:1px solid var(--line);padding-top:20px}.password-settings summary{cursor:pointer;font-size:14px;font-weight:650}.password-settings form{margin-top:22px}.recovery-notice{padding:20px;background:#edf3ff;border:1px solid #d3def5;border-radius:10px;margin-bottom:25px}.recovery-notice h2{font-size:21px}.recovery-notice p{font-size:12px}.recovery-notice code{display:block;font-size:14px;overflow-wrap:anywhere;user-select:all}footer small a{text-decoration:underline;text-underline-offset:3px}@media(max-width:640px){.material-gate{padding:24px}.material-gate h3{font-size:22px}.member-account h1{font-size:29px}.recovery-notice{padding:16px}.recovery-notice code{font-size:12px}}
.cf-turnstile{margin:1.25rem 0;min-height:65px}.member-reviews{border-top:1px solid var(--line,#e0e4ef);margin-top:2.5rem;padding-top:2rem}.rating-summary{display:flex;align-items:center;gap:.7rem;margin-bottom:1.5rem}.summary-star svg{width:30px;height:30px;fill:#d49a13;stroke:#976b0b}.review-editor{padding:1.5rem;border:1px solid #dce0f1;border-radius:18px;background:#f8f9ff}.star-picker{border:0;padding:0;margin:1rem 0}.star-picker legend{font-weight:700}.star-options{display:flex;width:max-content;max-width:100%;gap:.25rem;margin:.6rem 0}.star-choice{position:relative;cursor:pointer;display:block;margin:0!important;padding:.25rem;border-radius:9px;transition:transform .12s}.star-choice svg{width:42px;height:42px;fill:#eef0f7;stroke:#8b91a5;stroke-width:1.3;transition:fill .12s,transform .12s}.star-choice.filled svg{fill:#f5bf44;stroke:#a77409}.star-choice:hover svg{transform:scale(1.12)}.star-choice input{position:absolute;inset:0;opacity:0;width:100%;height:100%;cursor:pointer;margin:0}.star-choice:has(input:focus-visible){outline:3px solid #4338ca;outline-offset:2px}.star-status{display:block;font-weight:600;font-size:.9rem;color:#4a4f69}.review-meta{display:flex;flex-wrap:wrap;align-items:center;gap:1rem}.review-meta time{font-size:.8rem;color:#666b7c}.member-review{padding:1.5rem 0;border-bottom:1px solid #e3e6ef;overflow-wrap:anywhere}.review-stars{display:inline-flex;gap:2px}.review-stars svg{width:18px;height:18px;fill:#eef0f7;stroke:#8b91a5}.review-stars .filled svg{fill:#f5bf44;stroke:#a77409}.data-scroll{overflow:auto}.data-table{width:100%;border-collapse:collapse;font-size:.9rem}.data-table th,.data-table td{text-align:left;vertical-align:top;padding:.85rem;border-bottom:1px solid #e1e5ed}.data-table td{overflow-wrap:anywhere}.data-table th{background:#f5f6fb}.activity-bars{display:grid;gap:.6rem}.activity-row{display:grid;grid-template-columns:minmax(120px,1fr) 2fr auto;align-items:center;gap:1rem}.activity-row meter{width:100%;height:26px;accent-color:#6255d9}.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:1rem;margin:1rem 0}.stat-tile{padding:1.5rem;border:1px solid #e1e5ed;border-radius:16px;background:white}.stat-tile strong{display:block;font-size:2rem}.stat-tile span{color:#5d6579}.member-detail{margin:1rem 0}.pagination{display:flex;gap:1.5rem;margin:1.5rem 0}@media(prefers-reduced-motion:reduce){.star-choice svg{transition:none}}@media(max-width:450px){.star-choice svg{width:35px;height:35px}.review-editor{padding:1rem}.activity-row{grid-template-columns:1fr}.member-account{padding:1.2rem}}
.admin-user-layout{display:grid;grid-template-columns:minmax(240px,1fr) minmax(320px,1.6fr);gap:2rem}.admin-scroll,.member-scroll{max-height:560px;overflow:auto;border:1px solid #dce2ed;border-radius:14px;margin-top:1.2rem}.admin-scroll{padding:1.2rem}.member-scroll th{position:sticky;top:0;z-index:1}.admin-person{display:grid;gap:.45rem;padding:1.3rem 0;border-bottom:1px solid #e1e5ed;overflow-wrap:anywhere}.admin-person:last-child{border-bottom:0}.admin-person small{color:#5d6579}.row-actions{display:flex;flex-wrap:wrap;gap:.6rem;align-items:center}.row-actions form{margin:0}.temporary-password{font-size:1.25rem;overflow-wrap:anywhere;user-select:all}#member-popup{border:0;border-radius:20px;padding:1.7rem;width:min(1000px,94vw);max-height:88vh;overflow:auto;box-shadow:0 24px 100px #111c3c55;color:#172d40}#member-popup::backdrop{background:#15213d99;backdrop-filter:blur(3px)}.popup-heading{display:flex;justify-content:space-between;align-items:center;gap:1rem;position:sticky;top:-1.7rem;background:white;padding:.6rem 0;z-index:2}.popup-heading h2{margin:0}.member-stats-link{font-weight:700;text-decoration:underline;text-underline-offset:3px}@media(max-width:760px){.admin-user-layout{grid-template-columns:1fr}.admin-scroll,.member-scroll{max-height:450px}#member-popup{padding:1rem}.popup-heading{top:-1rem}}
.member-scroll .data-scroll{overflow:visible;min-width:850px}
#member-popup-body>h3{margin-top:1.8rem}#member-popup-body>.data-scroll{margin-top:1rem}
.popup-heading h2{font-size:clamp(1.25rem,3vw,1.9rem)}.popup-heading button{white-space:nowrap;flex-shrink:0}#member-popup-body{overflow-wrap:anywhere}@media(max-width:600px){#member-popup .stat-grid{grid-template-columns:repeat(2,minmax(0,1fr))}#member-popup .stat-tile{padding:1rem}#member-popup .stat-tile strong{font-size:1.6rem}}
.policy-page{max-width:940px;line-height:1.8}.policy-page h1{font-size:clamp(2rem,5vw,3.2rem);line-height:1.16;margin-bottom:1.5rem;letter-spacing:-.035em}.policy-page h2{font-size:1.4rem;margin:2rem 0 .7rem}.policy-page p{color:#465970;margin-bottom:1rem}.policy-page a:not(.button){text-decoration:underline;text-underline-offset:3px}.policy-page .panel h2{margin-top:0}.preferences-form .choice-row{padding:1.3rem 0;border-bottom:1px solid #e0e5ef}.choice-row label{display:flex;align-items:center;gap:.7rem;font-weight:700}.choice-row input[type=checkbox]{width:20px;height:20px;flex-shrink:0;accent-color:#3049d8}.choice-row label span{font-weight:400;font-size:.8rem;color:#5f6d80}.choice-row p{font-size:.93rem;line-height:1.7;margin:.6rem 0}.preferences-form>.button{margin-top:1.5rem}.video-consent{padding:1.5rem;margin:1.5rem 0;border:1px solid #d9e0ed;border-radius:16px;background:#f4f6fc}.video-consent h2{font-size:1.3rem;margin:0 0 .7rem}.video-consent form{margin:1rem 0}.cookie-notice{position:fixed;bottom:20px;left:20px;right:20px;z-index:20;max-width:1000px;margin:auto;background:white;border:1px solid #d7deed;box-shadow:0 8px 50px #162a4b22;border-radius:18px;padding:1.2rem 1.5rem;display:flex;gap:1.5rem;align-items:center}.cookie-notice p{font-size:.85rem;line-height:1.6;margin:.4rem 0}.cookie-notice a{font-size:.85rem;text-decoration:underline}.cookie-notice form{display:flex;gap:.6rem;flex-shrink:0}.cookie-notice .button{white-space:nowrap}.about-photo-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1rem;margin:2rem 0}.about-photo-grid img{width:100%;height:auto;border-radius:16px;object-fit:cover}footer{flex-wrap:wrap}footer nav{display:flex;gap:1.2rem;flex-wrap:wrap;font-size:.8rem}footer nav a{white-space:nowrap}footer small{flex-basis:100%}@media(max-width:700px){.cookie-notice{display:block;left:12px;right:12px;bottom:12px;padding:1rem}.cookie-notice form{margin-top:.8rem;flex-wrap:wrap}.choice-row label{flex-wrap:wrap}.about-photo-grid{grid-template-columns:1fr}footer nav{margin:1rem 0}.policy-page{line-height:1.7}}
.about-email-panel{margin-top:2rem}.email-envelope{display:grid;grid-template-columns:90px 1fr;gap:.5rem 1rem;overflow-wrap:anywhere}.email-envelope dt{font-weight:700}.email-envelope dd{margin:0}.email-preview{white-space:normal;line-height:1.8;background:#f6f8fc;border:1px solid #dde3ed;border-radius:14px;padding:1.5rem;margin:1.5rem 0;overflow-wrap:anywhere}

.site-admin-contact{display:flex;flex-wrap:wrap;align-items:center;gap:8px 20px;margin:0 0 24px;padding:16px 20px;border:1px solid var(--line);border-radius:12px;background:white;font-size:14px}.site-admin-contact a{overflow-wrap:anywhere}

.blog-page{max-width:1240px;margin:auto;padding:48px 34px 72px}.blog-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}.blog-card{border:1px solid var(--line);border-radius:16px;overflow:hidden;background:white}.blog-card>div{padding:24px}.blog-card img{width:100%;aspect-ratio:16/9;object-fit:cover;display:block}.blog-card h2{font-size:25px;line-height:1.25;margin:14px 0}.blog-card h2 a{color:inherit}.blog-card p{line-height:1.7}.blog-card time,.blog-post time{font-size:13px;color:var(--muted)}.blog-read{display:inline-block;margin-top:12px;font-weight:650}.blog-cover{width:100%;max-height:540px;object-fit:cover;border-radius:14px;margin:24px 0}.blog-cover-preview{max-width:320px;width:100%;border-radius:12px}.blog-post h1{overflow-wrap:anywhere}.blog-post .prose{overflow-wrap:anywhere}.nav-wrap nav .nav-blog{display:block}@media(max-width:900px){.blog-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:620px){.blog-page{padding:32px 22px 48px}.blog-grid{grid-template-columns:1fr}.nav-wrap nav{gap:12px}.nav-blog{font-size:12px}.blog-page .section-heading{align-items:flex-start;gap:14px;flex-wrap:wrap}}

.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

.video-wrap video{display:block;width:100%;height:100%;background:#101828}.source-options{display:flex;flex-wrap:wrap;gap:18px}.simple-admin .panel{margin-top:24px}.upload-status{padding:12px;background:#eef3ff;border-radius:8px}

[hidden]{display:none!important}

.video-links{margin:1.5rem 0;padding:1.25rem 0;border-top:1px solid var(--line,#ddd)}.video-links .source-url{overflow-wrap:anywhere}.video-links .creator-credit{margin-top:0}

/* Compact, numbered category outlines. */
.outline-page{position:relative;isolation:isolate;min-height:65vh;padding-top:2rem;padding-bottom:3rem}.outline-page::before{content:"";position:absolute;inset:0;z-index:-1;opacity:.055;background-repeat:repeat;background-size:170px 170px;pointer-events:none}.outline-page h1{font-size:clamp(2rem,4vw,3rem);margin:.75rem 0}.outline-heading{display:grid;grid-template-columns:5rem 1fr;padding:.6rem .8rem;border-bottom:2px solid #d4dce5;font-size:.8rem;font-weight:700;color:#526171}.video-outline{list-style:none;padding:0;margin:0}.video-outline .video-outline{padding-left:1.3rem;border-left:1px solid #d9e0e8;margin-left:.7rem}.video-outline li{margin:0}.video-outline summary{display:flex;align-items:center;gap:.5rem;padding:.65rem .6rem;cursor:pointer;border-bottom:1px solid #e0e5eb;background:#f0f4f9cc}.video-outline summary::before{content:'▾';font-size:.7rem;flex:0 0 .7rem}.video-outline details:not([open])>summary::before{content:'▸'}.outline-number{font-variant-numeric:tabular-nums;font-weight:600;flex:0 0 4rem;color:#536277}.outline-video-row{display:flex;align-items:center;gap:.5rem;padding:.6rem .8rem;border-bottom:1px solid #e0e5eb;color:#1b314d;text-decoration:none;background:#ffffffc4;line-height:1.5}.outline-video-row:hover{background:#edf3ff}.outline-watch{margin-left:auto;font-size:.75rem;white-space:nowrap;color:#3159bd}.outline-editor p{font-size:.88rem}.outline-add-topic{display:flex;gap:.75rem;align-items:end;margin:1rem 0;flex-wrap:wrap}.outline-add-topic label{flex:1;min-width:180px}.outline-admin-row{display:grid;grid-template-columns:1.8rem 4rem minmax(0,1fr) auto;align-items:center;gap:.3rem;min-height:46px;border-bottom:1px solid #dce3ec;background:#fff;padding:.3rem .4rem;line-height:1.4}.outline-depth-2{margin-left:1.5rem}.outline-depth-3{margin-left:3rem}.outline-admin-row .outline-number{font-size:.85rem}.outline-label{min-width:0;font-size:.88rem;overflow-wrap:anywhere}.outline-label small{margin-left:.5rem;color:#6a7280}.outline-handle,.outline-controls button{border:1px solid #d6dfeb;border-radius:5px;background:#f4f7fb;color:#243b5a;min-width:30px;min-height:30px;cursor:pointer}.outline-handle{touch-action:none;cursor:grab;font-size:1.25rem}.outline-controls{display:flex;gap:3px}.outline-controls button:disabled{opacity:.25;cursor:default}.topic-edit>summary{cursor:pointer;color:#526171;font-size:.75rem}.topic-edit form{padding:.5rem 0}.outline-dragging{opacity:.5}.outline-admin-row.drop-before{box-shadow:0 -3px #3159bd}.outline-admin-row.drop-after{box-shadow:0 3px #3159bd}.outline-admin-row.drop-inside{background:#dce9ff;outline:2px dashed #3159bd}.outline-controls button:focus-visible,.outline-handle:focus-visible{outline:3px solid #3159bd;outline-offset:2px}@media(max-width:600px){.outline-admin-row{grid-template-columns:1.5rem 3rem minmax(0,1fr)}.outline-controls{grid-column:3;justify-content:flex-start}.outline-depth-2{margin-left:.8rem}.outline-depth-3{margin-left:1.6rem}.video-outline .video-outline{padding-left:.55rem;margin-left:.25rem}.outline-number{flex-basis:3rem;font-size:.8rem}.outline-watch{font-size:0}.outline-watch span{font-size:.9rem}.outline-heading{grid-template-columns:4rem 1fr}.outline-video-row{padding:.5rem .4rem}}
.category-selected-moving{position:relative;z-index:20;transform-origin:top left;pointer-events:none}.category-heading{display:flex;gap:1.2rem;align-items:center;margin:1rem 0 1.5rem}.category-heading h1{margin:0 0 .5rem}.category-heading p{margin:0}.category-selected{flex:0 0 96px;width:96px;height:96px;border-radius:16px;overflow:hidden;box-shadow:0 8px 24px #263b7a18}.category-selected .card-art{height:96px;width:96px;display:grid;place-content:center;position:relative}.category-selected .math-icon{font-size:42px;z-index:1}.category-selected .card-art img{height:96px;width:96px;object-fit:cover}.category-selected .card-art:after{width:55px;height:55px}.outline-arriving .outline-tree{transform-origin:top left;animation:outline-unfold .48s cubic-bezier(.15,.8,.3,1) .06s both}.outline-arriving .category-heading{animation:category-settle .3s ease-out both}@keyframes outline-unfold{from{opacity:0;transform:translateY(-28px) scaleY(.95)}to{opacity:1;transform:translateY(0) scaleY(1)}}@keyframes category-settle{from{opacity:.75;transform:translateY(-5px)}to{opacity:1;transform:translateY(0)}}@media(prefers-reduced-motion:reduce){.outline-arriving .outline-tree,.outline-arriving .category-heading{animation:none!important}.category-selected-moving{transform:none!important}}@media(max-width:600px){.category-heading{gap:.8rem}.category-heading h1{font-size:2rem}}
@media(max-width:640px){.nav-wrap{flex-wrap:wrap;gap:12px}.nav-wrap nav{width:100%;justify-content:space-between;gap:12px;flex-wrap:wrap}.nav-wrap nav a{white-space:nowrap}.outline-heading{font-size:.75rem}}

.category-transitioning{overflow-x:hidden}
.card-image-preview{margin:1rem 0;padding:1rem;border:1px solid var(--line);border-radius:12px}.card-image-preview img{display:block;width:150px;height:150px;object-fit:cover;border-radius:12px}.card-image-preview h3{font-size:1rem}.card-image-preview p{margin:.5rem 0}

.simple-admin .admin-tabs{gap:9px;padding:12px;background:#eaf0ff;border:1px solid #d5dffa;border-radius:14px;margin:20px 0 24px}.simple-admin .admin-tabs a{padding:10px 15px;border:1px solid #ced8f3;border-radius:9px;background:#fff;color:#263d75;font-size:13px;font-weight:700;line-height:1.35;box-shadow:0 2px 4px #203a7610;transition:background .15s,box-shadow .15s}.simple-admin .admin-tabs a:hover{background:#dde7ff;border-color:#9bb0eb;box-shadow:0 3px 8px #203a7620}.simple-admin .admin-tabs a[aria-current="page"]{background:#2b45de;color:#fff;border-color:#2b45de;box-shadow:0 3px 9px #2b45de30}.simple-admin .admin-tabs a:focus-visible{outline:3px solid #172b83;outline-offset:3px}.simple-admin .admin-tabs a:last-child{margin-left:auto;background:#f5f8ff}@media(max-width:640px){.simple-admin .admin-tabs{gap:7px;padding:10px}.simple-admin .admin-tabs a{padding:9px 12px;font-size:12px}.simple-admin .admin-tabs a:last-child{margin-left:0}}

.simple-admin .admin-top .signed-in-highlight{display:inline-block;background:#fff29b;color:#493b00;padding:8px 12px;border:1px solid #e7cf59;border-radius:8px;font-size:13px;line-height:1.5;overflow-wrap:anywhere}.signed-in-highlight strong{font-weight:750}

.topic-actions{display:flex;gap:8px;align-items:flex-start;flex-wrap:wrap;margin:.45rem 0}.topic-actions>details{max-width:100%}.topic-actions>details>summary{display:list-item;list-style-position:inside;padding:6px 10px;border:1px solid #becdf1;border-radius:7px;font-size:12px;font-weight:700;color:#254295;background:#edf3ff;cursor:pointer}.topic-actions>.topic-delete>summary{color:#923045;background:#fff1f3;border-color:#edc5ce}.topic-actions>details[open]{flex-basis:100%;padding:8px;background:#f7f9fe;border-radius:8px}.topic-actions>details>p{margin:.7rem 0;font-size:.85rem}.topic-actions input{max-width:100%}.topic-actions summary:focus-visible{outline:3px solid #3159bd;outline-offset:2px}
.video-finished{padding:2rem;border:1px solid #d5dffa;border-radius:16px;background:#f1f5ff;text-align:center;margin:1rem 0}.video-finished h2{font-size:1.5rem}.single-play-player [hidden]{display:none!important}

.outline-edit-video{margin-left:.65rem;padding:.25rem .65rem;vertical-align:middle}.outline-label .outline-edit-video{color:#fff;background:#175fa6;text-decoration:none}

.sign-out-notice{max-width:640px;margin:4rem auto;text-align:center;padding:2rem;border-top:5px solid #237a42;box-shadow:0 12px 40px #173b5720}

.debug-checklist{max-width:960px;margin:2rem auto}.debug-checklist .panel{margin:1.5rem 0;padding:1.4rem}.debug-checklist h2{font-size:1.2rem}.debug-check-row{display:flex;align-items:flex-start;gap:.8rem;padding:.75rem .4rem;border-bottom:1px solid #dbe4ea;cursor:pointer;font-weight:400}.debug-check-row input{width:1.3rem;height:1.3rem;flex:0 0 1.3rem;margin:.15rem 0;accent-color:#176f42}.debug-check-row:has(input:checked){background:#edf8ef}.debug-check-row input:focus-visible{outline:3px solid #1768bd;outline-offset:3px}

.editable-home{padding-top:24px;padding-bottom:12px}.editable-home .hero-art{height:280px;transform:scale(.7);transform-origin:center}.editable-home+.subjects-section{padding-top:12px}.editable-home .hero-copy .button{margin-top:14px}.home-upload-art img{display:block;width:100%;max-height:300px;object-fit:contain}.home-upload-art{min-width:0}@media(max-width:640px){.editable-home .hero-art{height:230px;margin-top:0;transform:scale(.62);transform-origin:top center}.editable-home{padding-bottom:0}.home-upload-art{margin-top:18px}}

.editable-logo{display:block;max-width:240px;max-height:64px;width:auto;height:auto;object-fit:contain}@media(max-width:640px){.editable-logo{max-width:170px;max-height:48px}}

.home-explore h2{font-size:23px;margin:0 0 14px}.subjects-graphic-button{display:block;max-width:760px;border:1px solid #d6dfef;border-radius:18px;background:#fff;padding:18px;box-shadow:0 7px 22px #223b6710;transition:box-shadow .2s,transform .2s}.subjects-graphic-button:hover{transform:translateY(-3px);box-shadow:0 12px 26px #223b6720}.subjects-graphic-button:focus-visible{outline:3px solid #2854d8;outline-offset:4px}.subjects-mini-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}.subject-mini{display:flex;flex-direction:column;align-items:center;gap:8px;min-width:0}.subject-mini img{height:94px;width:100%;object-fit:contain;border-radius:10px}.subject-mini strong{font-size:14px}.subjects-button-label{display:block;margin-top:18px;text-align:center;color:#2440be;font-weight:700}.home-lessons-panel{max-width:1172px;margin:0 auto 45px;padding:24px;border-radius:14px;background:#f8faff}.home-lessons-panel h2{font-size:23px;margin-bottom:12px}.home-lessons-panel p{font-size:15px;margin-bottom:18px}.header-admin-logout{display:inline-flex;margin:0}.header-admin-logout button{white-space:nowrap;border-color:#c3aa55;background:#fff4be;color:#493700}.nav-wrap nav{flex-wrap:wrap}.subject-browser-intro{padding-bottom:0}.subject-browser-intro+.subjects-section{padding-top:15px}@media(max-width:1239px){.home-lessons-panel{margin-left:34px;margin-right:34px}}@media(max-width:640px){.subjects-mini-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.home-lessons-panel{margin-left:22px;margin-right:22px}.home-explore h2{font-size:21px}.header-admin-logout .button{padding:8px;font-size:11px}.subject-mini img{height:85px}}
/* Align the home page subject gateway and lesson panel to one column. */
.home-explore{max-width:1172px;box-sizing:border-box;margin-left:auto;margin-right:auto;padding-bottom:24px}.home-explore .subjects-graphic-button{max-width:none;box-sizing:border-box;width:100%}.home-lessons-panel{box-sizing:border-box;width:calc(100% - 68px);max-width:1172px;padding:24px 0;margin-top:0;background:transparent;border-top:1px solid var(--line);border-radius:0}.home-explore h2,.home-lessons-panel h2{font-size:23px;line-height:1.3}.subject-mini img{width:94px;height:94px;flex:none}.subjects-mini-grid{align-items:start}.subject-mini strong{display:block;min-height:22px;text-align:center}@media(max-width:1239px){.home-explore{margin-left:34px;margin-right:34px}.home-lessons-panel{margin-left:34px;margin-right:34px}}@media(max-width:640px){.home-explore{margin-left:22px;margin-right:22px}.home-lessons-panel{width:calc(100% - 44px);margin-left:22px;margin-right:22px}.home-explore h2,.home-lessons-panel h2{font-size:21px}}
.home-explore .subjects-mini-grid{grid-template-columns:repeat(4,124px);justify-content:center;gap:14px}.home-explore .subject-mini{width:124px}@media(max-width:640px){.home-explore .subjects-mini-grid{grid-template-columns:repeat(2,124px);gap:16px 12px}}@media(max-width:360px){.home-explore .subjects-mini-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.home-explore .subject-mini{width:auto;min-width:0}.home-explore .subject-mini img{max-width:100%}}
.home-explore .subjects-graphic-button{padding:22px;min-height:175px;display:flex;justify-content:center;align-items:center}.home-explore .subjects-mini-grid{display:flex;justify-content:center;align-items:center;gap:0;padding:10px 22px}.home-explore .subject-mini{display:block;width:110px;flex:0 0 110px;position:relative;filter:drop-shadow(0 5px 5px #20355b20)}.home-explore .subject-mini+.subject-mini{margin-left:-35px}.home-explore .subject-mini:nth-child(1){transform:rotate(-12deg) translateY(6px)}.home-explore .subject-mini:nth-child(2){transform:rotate(-4deg)}.home-explore .subject-mini:nth-child(3){transform:rotate(4deg)}.home-explore .subject-mini:nth-child(4){transform:rotate(12deg) translateY(6px)}.home-explore .subject-mini img{width:110px;height:110px;max-width:none;border-radius:0;object-fit:cover}.home-explore .subject-mini strong,.home-explore .subjects-button-label{display:none}.home-explore .subjects-graphic-button:focus-visible{outline:3px solid #2854d8;outline-offset:4px}@media(max-width:420px){.home-explore .subjects-mini-grid{padding:10px 0}.home-explore .subject-mini{width:86px;flex-basis:86px}.home-explore .subject-mini img{width:86px;height:86px}.home-explore .subject-mini+.subject-mini{margin-left:-32px}.home-explore .subjects-graphic-button{padding:16px;min-height:145px}}
.home-explore .subjects-graphic-button,.home-lessons-panel>.button{box-sizing:border-box;width:420px;max-width:100%;height:175px;min-height:175px;display:flex;align-items:center;justify-content:center;padding:22px;text-align:center;border-radius:18px}.home-lessons-panel>.button{font-size:16px;line-height:1.5;white-space:normal}@media(max-width:420px){.home-explore .subjects-graphic-button,.home-lessons-panel>.button{height:145px;min-height:145px;padding:16px}}

.home-action-photo{display:block;width:100%;height:100%;object-fit:contain}.home-button-editor-preview{display:block;max-width:100%;width:280px;height:117px;object-fit:contain;margin-bottom:12px}.subjects-graphic-button:has(>.home-action-photo),.home-lessons-panel>.button:has(>.home-action-photo){padding:8px}

.home-current-image{margin:20px 0;padding:16px;background:#f7f9fd;border:1px solid var(--line);border-radius:12px}.home-current-image>img{display:block;width:100%;max-height:240px;object-fit:contain}.home-default-art-preview{height:230px;overflow:hidden;display:flex;justify-content:center}.home-default-art-preview .hero-art{flex:0 0 400px;transform:scale(.6);transform-origin:top center;height:340px;margin:0}.home-logo-preview{display:flex;gap:10px;align-items:center;margin-bottom:16px;font-size:24px}.home-default-cards-preview{display:flex;justify-content:center;padding:22px 12px;margin:12px 0;background:#f8faff;overflow:hidden;border:1px solid var(--line);border-radius:12px}.home-default-cards-preview img{width:85px;height:85px;object-fit:cover;box-shadow:0 4px 10px #23344a20}.home-default-cards-preview img+img{margin-left:-26px}.home-default-cards-preview img:nth-child(1){transform:rotate(-12deg)}.home-default-cards-preview img:nth-child(2){transform:rotate(-4deg)}.home-default-cards-preview img:nth-child(3){transform:rotate(4deg)}.home-default-cards-preview img:nth-child(4){transform:rotate(12deg)}.home-default-lessons-preview{display:flex;align-items:center;justify-content:center;max-width:420px;min-height:140px;padding:18px;background:#3040e8;color:white;text-align:center;border-radius:18px;margin-bottom:16px;font-weight:700}

.card-color-swatches{display:flex;flex-wrap:wrap;gap:14px;padding:8px 4px}.card-color-swatch{position:relative;display:block;width:48px;height:48px;margin:0;cursor:pointer;flex:0 0 48px}.card-color-swatch input{appearance:none;-webkit-appearance:none;display:block;width:48px;height:48px;margin:0;border:2px solid #a8b4c4;border-radius:10px;background:var(--swatch-color);cursor:pointer}.card-color-swatch input:checked{border:3px solid #203fb2;outline:2px solid #203fb2;outline-offset:3px}.card-color-swatch input:focus-visible{outline:3px solid #172c85;outline-offset:4px}.card-color-swatch span{position:absolute;inset:0;display:none;align-items:center;justify-content:center;pointer-events:none;color:#18315b;font-size:24px;font-weight:800}.card-color-swatch input:checked+span{display:flex}

.red{--art-bg:#ffe0df;--art-ink:#283b58}
.yellow{--art-bg:#fff5bf;--art-ink:#283b58}
.lime{--art-bg:#eaf5c7;--art-ink:#283b58}
.cyan{--art-bg:#d7f4ff;--art-ink:#283b58}
.indigo{--art-bg:#e0e2ff;--art-ink:#283b58}
.lavender{--art-bg:#f0e8ff;--art-ink:#283b58}
.rose{--art-bg:#fbdde6;--art-ink:#283b58}
.peach{--art-bg:#ffe6d5;--art-ink:#283b58}
.slate{--art-bg:#e2e8f0;--art-ink:#283b58}
.sand{--art-bg:#eee7d8;--art-ink:#283b58}

.card-color-swatch.swatch-blue input{background-color:#dce7ff}
.card-color-swatch.swatch-purple input{background-color:#eee0ff}
.card-color-swatch.swatch-green input{background-color:#dcefe1}
.card-color-swatch.swatch-orange input{background-color:#fff0d9}
.card-color-swatch.swatch-pink input{background-color:#ffe0ed}
.card-color-swatch.swatch-teal input{background-color:#d6f2ee}
.card-color-swatch.swatch-red input{background-color:#ffe0df}
.card-color-swatch.swatch-yellow input{background-color:#fff5bf}
.card-color-swatch.swatch-lime input{background-color:#eaf5c7}
.card-color-swatch.swatch-cyan input{background-color:#d7f4ff}
.card-color-swatch.swatch-indigo input{background-color:#e0e2ff}
.card-color-swatch.swatch-lavender input{background-color:#f0e8ff}
.card-color-swatch.swatch-rose input{background-color:#fbdde6}
.card-color-swatch.swatch-peach input{background-color:#ffe6d5}
.card-color-swatch.swatch-slate input{background-color:#e2e8f0}
.card-color-swatch.swatch-sand input{background-color:#eee7d8}

.card-art img[data-card-art-image][hidden],.card-art-fallback[hidden]{display:none!important}.card-art-fallback:not([hidden]){display:contents}

.subject-sort-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;align-items:stretch}.subject-sort-grid .manage-card{position:relative;display:flex;flex-direction:column;align-items:stretch;justify-content:flex-start;padding:12px;gap:8px;min-width:0;min-height:250px;border-radius:12px}.subject-sort-image .card-art{height:85px;min-height:0;width:100%;border-radius:8px}.subject-sort-image .card-art img{width:100%;height:85px;object-fit:contain}.subject-sort-image .math-icon{font-size:32px}.subject-sort-grid .manage-identity{gap:8px;align-items:flex-start}.subject-sort-grid .manage-identity h3{font-size:16px;margin:3px 0;line-height:1.3}.subject-sort-grid .manage-identity a{font-size:11px}.subject-sort-grid .manage-actions{margin:0;margin-top:auto;max-width:none;justify-content:flex-start;gap:5px;flex-shrink:1}.subject-sort-grid .manage-actions .button{font-size:10px;padding:6px 8px}.subject-sort-grid .sort-handle{cursor:grab;touch-action:none}.subject-sort-grid.sorting,.subject-sort-grid.sorting *{cursor:grabbing}.subject-sort-grid .dragging{opacity:.45;border:2px dashed #2854db;background:#edf3ff}.subject-sort-grid .insert-before:before,.subject-sort-grid .insert-after:after{content:"";position:absolute;top:0;bottom:0;width:5px;background:#284fdf;border-radius:5px;z-index:2}.subject-sort-grid .insert-before:before{left:-10px}.subject-sort-grid .insert-after:after{right:-10px}.subject-empty-slot{border:1px dashed #d8e1ee;background:#f8faff;border-radius:12px;min-height:250px;pointer-events:none}@media(max-width:800px){.subject-sort-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:380px){.subject-sort-grid{gap:8px}.subject-sort-grid .manage-card{padding:8px}}

.subject-sort-grid .manage-card{touch-action:none;cursor:grab;user-select:none;-webkit-user-select:none}.subject-sort-grid .manage-card img{-webkit-user-drag:none;user-select:none}.subject-sort-grid .manage-card a,.subject-sort-grid .manage-card button{cursor:pointer}.subject-sort-grid.sorting .manage-card{cursor:grabbing}.subject-sort-grid .dragging{opacity:.7;border:2px dashed #2854db;box-shadow:0 0 0 3px #2854db25}.subject-sort-grid .dragging.insert-before:before{width:6px;background:#2457f5;box-shadow:0 0 0 2px #fff;left:-10px}

/* Use the same card dimensions and contained image proportions in editor and homepage. */
.home-explore .subjects-graphic-button,.home-lessons-panel>.button,.home-button-editor-preview,.home-default-lessons-preview,.home-default-cards-preview{box-sizing:border-box;width:420px;max-width:100%;height:175px;min-height:175px;padding:22px;border-radius:18px;font-size:16px;line-height:1.5}.home-button-editor-preview{object-fit:contain;padding:8px;border:1px solid var(--line);background:#fff}.home-default-cards-preview{align-items:center}.home-default-lessons-preview{background:#3040e8;color:#fff}.home-action-photo{object-fit:contain;width:100%;height:100%}@media(max-width:420px){.home-explore .subjects-graphic-button,.home-lessons-panel>.button,.home-button-editor-preview,.home-default-lessons-preview,.home-default-cards-preview{height:145px;min-height:145px;padding:16px}.home-button-editor-preview{padding:8px}}

[data-home-button-media]{display:flex;align-items:center;justify-content:center;width:100%;height:100%}[data-home-button-media][hidden],[data-home-button-fallback][hidden]{display:none!important}[data-home-button-fallback]{font-size:16px;line-height:1.5;font-weight:700;text-align:center}.subjects-graphic-button>[data-home-button-fallback]{color:#2440be}

.home-subject-cards{padding-top:12px}.home-subject-cards .section-heading h2{font-size:23px}.home-subject-cards .all-subjects-link{margin:22px 0 0;text-align:center}.home-subject-cards .card-copy p{min-height:44px}

.playback-sound{margin-bottom:12px}
/* Public navigation follows the logo; account controls stay at the far edge. */
.nav-wrap{justify-content:flex-start;gap:32px}.nav-wrap>nav{flex:1;justify-content:flex-start}.nav-wrap>nav>.nav-admin{margin-left:auto}.nav-wrap>nav>.header-admin-logout{margin-left:0}@media(max-width:640px){.nav-wrap{gap:16px;flex-wrap:wrap}.nav-wrap>nav{gap:14px;min-width:0}.nav-wrap>nav>a:first-child{display:inline-flex}.nav-wrap>nav>.nav-admin{margin-left:auto}}

.admin-person-compact{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 0}.admin-person-compact>strong{min-width:0;overflow-wrap:anywhere}.admin-person-compact>a{flex-shrink:0}.admin-details-dialog{width:min(650px,calc(100% - 32px));max-height:85vh;overflow:auto;padding:26px;border:1px solid var(--line);border-radius:16px;color:var(--ink);background:white;box-shadow:0 20px 70px #17243e40}.admin-details-dialog::backdrop{background:#17243e80}.admin-dialog-heading{display:flex;align-items:flex-start;justify-content:space-between;gap:16px}.admin-dialog-heading h2{font-size:24px}.admin-login-statistics{margin:24px 0;padding-top:18px;border-top:1px solid var(--line)}.admin-login-statistics dl{display:grid;grid-template-columns:1fr 1fr;gap:8px 16px;font-size:14px}.admin-login-statistics dt{font-weight:650}.admin-login-statistics dd{margin:0}.admin-details-dialog .row-actions{display:flex;flex-wrap:wrap;gap:8px}@media(max-width:480px){.admin-details-dialog{padding:18px}.admin-person-compact{gap:8px}.admin-login-statistics dl{grid-template-columns:1fr}.admin-login-statistics dd{margin-bottom:8px}}

.home-editor-sections{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.home-editor-section{min-width:0;border:1px solid var(--line);border-radius:14px;overflow:hidden;padding:16px;background:#fff}.home-section-preview{height:190px;overflow:hidden;display:flex;flex-direction:column;justify-content:center;margin-bottom:12px;background:#f8faff;padding:12px;border-radius:10px}.home-section-preview>img{width:100%;height:100%;object-fit:contain}.home-section-preview h3{font-size:20px}.home-section-preview p{font-size:13px;margin-bottom:0}.home-section-preview .home-default-lessons-preview{width:100%;max-height:160px;min-height:120px;margin:0}.home-section-preview .home-default-art-preview{height:180px}.home-section-heading{display:flex;align-items:center;justify-content:space-between;gap:12px}.home-section-heading h3{font-size:17px;margin:0}.home-section-dialog h3{font-size:19px}@media(max-width:640px){.home-editor-sections{grid-template-columns:1fr}}

.outline-admin-row[hidden]{display:none}.outline-toggle{border:0;background:transparent;color:inherit;cursor:pointer;font-size:18px;padding:6px 10px;margin-right:4px}

.outline-admin-row.outline-selected{background:#fff3bd;outline:2px solid #d49b00;outline-offset:-2px;box-shadow:inset 5px 0 #d49b00}.outline-admin-row.outline-selected .outline-number{font-weight:800;color:#684500}

.outline-label:has(.topic-actions){display:flex;align-items:center;flex-wrap:wrap;gap:10px}.outline-label .topic-actions{display:flex;align-items:flex-start;gap:10px;margin-left:auto}.outline-label .topic-edit>summary,.outline-toggle{font-size:13px;font-weight:700;cursor:pointer}.outline-label .topic-edit[open]{max-width:420px}.outline-toggle{white-space:nowrap}

.outline-add-topic{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr) auto;align-items:end;gap:12px}.outline-add-topic label{display:flex;flex-direction:column;gap:8px;margin:0;min-width:0}.outline-add-topic input,.outline-add-topic select,.outline-add-topic>.button{height:48px;box-sizing:border-box;margin:0}.outline-add-topic select{width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:8px;font:inherit;background:#fff}.outline-add-topic>.button{align-self:end}@media(max-width:600px){.outline-add-topic{grid-template-columns:1fr}.outline-add-topic>.button{justify-self:start}}

.outline-add-topic{grid-template-columns:minmax(0,1fr) auto}

.simple-admin .add-button{background:#46765a;border-color:#46765a;color:#fff}.simple-admin .add-button:hover{background:#365f47;border-color:#365f47;color:#fff}.simple-admin .add-button:focus-visible{outline:3px solid #a8ccb2;outline-offset:3px}.outline-add-topic-launch{display:flex;justify-content:flex-end;margin:16px 0}

.outline-label .topic-actions{margin-left:0}

[data-add-chapter][hidden]{display:none!important}

.outline-empty-chapters{margin:0;padding:12px 24px 12px 90px;color:#667085;font-size:14px;background:#f8fafc}

.simple-admin form:has([data-auto-subject]){display:block}.simple-admin form:has([data-auto-subject])>label{display:block;width:50%;font-size:17px}.simple-admin [data-auto-subject]{display:block;width:100%;font-size:20px;line-height:1.4;min-height:52px;padding:10px 14px;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--ink)}@media(max-width:640px){.simple-admin form:has([data-auto-subject])>label{width:100%}}

.chapter-move-topic{display:flex;align-items:center;gap:8px;font-size:12px;margin:0}.chapter-move-topic select{font:inherit;max-width:220px;padding:6px;border:1px solid var(--line);border-radius:6px;background:#fff}

.policy-page figure{margin:24px 0}.policy-page figure img{display:block;width:100%;max-width:1000px;height:auto;border:1px solid var(--line);border-radius:12px}.policy-page figcaption{font-size:13px;color:#667085;margin-top:8px}

.outline-editor>.admin-top{justify-content:flex-start;gap:24px;flex-wrap:wrap}.outline-no-topics{color:#b42318;font-weight:700;margin:0;font-size:14px}

.outline-empty-chapters{color:#b42318;font-weight:700}

.outline-editor>.admin-top>.outline-add-topic-header{margin-left:auto;flex-shrink:0}

.outline-depth-4{margin-left:4.8rem}.outline-controls form{margin:0}.outline-controls{align-items:center}

.outline-admin-list{overflow-x:auto}.outline-admin-row{min-width:1050px}.outline-label:has(.topic-actions){flex-wrap:nowrap;gap:10px;min-width:0}.outline-label>.topic-actions{display:contents}.outline-label>strong{flex:0 1 170px;min-width:75px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.outline-label .chapter-move-topic{flex-shrink:0;white-space:nowrap}.chapter-move-topic select{max-width:165px}.outline-controls{flex-wrap:nowrap;white-space:nowrap}.outline-label .button,.outline-label .outline-toggle{flex-shrink:0}

.outline-admin-row:not(.outline-selected) .outline-edit-video,.outline-admin-row:not(.outline-selected) .topic-actions,.outline-admin-row:not(.outline-selected) .topic-actions>* ,.outline-admin-row:not(.outline-selected) .outline-controls{visibility:hidden;pointer-events:none}.outline-admin-row:not(.outline-selected) .outline-toggle{visibility:visible;pointer-events:auto}

.outline-controls>.outline-delete-form{order:100;margin-left:10px}

.outline-controls>.outline-delete-video{order:100;margin-left:10px}

.outline-empty-chapters[hidden]{display:none}

.outline-admin-row:not(.outline-selected) .outline-label>strong,.outline-admin-row:not(.outline-selected) .outline-video-title{font-weight:400}.outline-admin-row.outline-selected .outline-label>strong,.outline-admin-row.outline-selected .outline-video-title{font-weight:700}

.simple-admin .error{color:#b42318;background:#fff1f0;border:1px solid #f4b4ae;padding:12px 16px;border-radius:8px}

/* Readable footer text on desktop and mobile. */
footer{font-size:14px}footer nav{font-size:14px}footer small{font-size:14px;line-height:1.6;font-weight:500;color:#34445a}