:root{font-family:Inter,"Segoe UI",system-ui,sans-serif;font-synthesis:none;color-scheme:dark;--canvas:#0b1410;--surface:#101c17;--raised:#192a22;--soft:#21382b;--ink:#e7efe8;--muted:#a0b2a5;--mint:#a8d5b7;--line:#b6d5c018;color:var(--ink);background:var(--canvas);scroll-behavior:smooth;scroll-padding-top:24px}*{box-sizing:border-box}body{margin:0}a{color:inherit;text-decoration:none}button{font:inherit;color:inherit;cursor:pointer;border:0;background:none}button,a{touch-action:manipulation;-webkit-tap-highlight-color:transparent}svg{width:22px;height:22px;flex-shrink:0;vertical-align:middle}h1,h2,h3,p,figure{margin:0}p{line-height:1.75}a,button{min-height:44px}:focus-visible{outline:2px solid var(--mint);outline-offset:5px}[hidden]{display:none!important}.desktop-window{max-width:1560px;margin:18px auto;border:1px solid #3c514238;border-radius:14px;background:var(--surface);display:grid;grid-template-columns:202px minmax(0,1fr);grid-template-rows:58px auto;overflow:clip;box-shadow:0 25px 80px #0002}.titlebar{grid-column:1/-1;position:relative;z-index:10;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:0 26px;border-bottom:1px solid var(--line);background:#142019f5;backdrop-filter:blur(16px)}.wordmark,.footer-brand{display:flex;align-items:center;gap:9px;font-size:27px;letter-spacing:-1.4px;font-weight:600}.wordmark svg,.footer-brand svg{width:25px;height:25px;color:var(--mint)}.window-caption{font-size:12px;color:var(--muted);margin-left:65px}.header-open{font-size:12px;display:flex;gap:16px;align-items:center;color:var(--mint)}.sidebar{position:sticky;top:20px;height:calc(100svh - 40px);max-height:1000px;display:flex;flex-direction:column;background:#132018;padding:34px 15px 25px;border-right:1px solid var(--line)}.sidebar-label{font-size:9px;letter-spacing:1.6px;color:#8fa393;margin:0 14px 20px}.sidebar nav{display:grid;gap:7px}.sidebar nav a{display:flex;align-items:center;gap:11px;padding:13px 13px;font-size:12px;color:var(--muted);border-radius:7px;transition:background .2s,color .2s}.sidebar nav svg{width:18px;height:18px}.sidebar nav a[aria-current]{background:#294334;color:#c0e5ca}.sidebar nav a:hover{background:#24382c;color:var(--ink)}.sidebar-bottom{margin-top:auto;display:grid;gap:14px;padding:0 12px}.sidebar-app{display:flex;align-items:center;gap:8px;font-size:11px;color:#b1c6b7}.sidebar-app>span:last-child{margin-left:auto}.sidebar-bottom button{text-align:left;padding:0;font-size:11px;color:#97aa9d}.status-dot{width:5px;height:5px;display:inline-block;flex-shrink:0;border-radius:50%;background:var(--mint)}main{min-width:0;outline:none}.hero{min-height:600px;height:calc(100svh - 95px);max-height:900px;display:flex;flex-direction:column;align-items:center;text-align:center;position:relative;justify-content:center;padding:35px 28px 45px;background:radial-gradient(ellipse at 50% 52%,#31553f30,transparent 53%)}.intro-marker{display:flex;align-items:center;gap:9px;font-size:12px;color:#afc4b6}h1{font-size:clamp(42px,5vw,70px);letter-spacing:-3px;font-weight:450;line-height:1.08;margin:20px 0 16px}h1>span{color:#a8d5b7}.hero-copy{font-size:14px;color:var(--muted)}.orb-stage{width:310px;height:220px;position:relative;display:grid;place-items:center;flex-shrink:0;margin:2px 0 8px}.study-orb{display:block;position:relative;width:145px;height:145px;border-radius:50%;z-index:1;box-shadow:0 0 65px #9ad4af1c;transition:transform .6s,box-shadow .6s}.study-orb:hover{transform:scale(1.07);box-shadow:0 0 80px #9ad4af38}.orb-core{width:100%;height:100%;display:block;border-radius:50%;position:relative;overflow:hidden;background:radial-gradient(ellipse at 32% 20%,#eef8db 0%,#c5e8c2 19%,#8bc6af 43%,#659a9c 65%,#516e93 83%,#9ec9d6 100%);box-shadow:inset 2px 3px 9px #e8fff7a0,inset -6px -9px 20px #102b363a,inset 0 0 2px 1px #ddffe988}.orb-wave{position:absolute;inset:30% -26% -12%;border-radius:45%;background:linear-gradient(125deg,#a6e7cf91,#cbe6bc8f 30%,#81c9b848 57%,#819bd260);transform:rotate(-30deg);box-shadow:0 -5px 15px #edffe357;animation:orb-drift 14s ease-in-out infinite alternate}.orb-light{position:absolute;inset:0;background:radial-gradient(ellipse at 30% 16%,#fff9,transparent 40%)}.orb-mark{position:absolute;inset:0;display:grid;place-items:center;color:#204c3d88}.orb-mark svg{width:35px;height:35px;stroke-width:1}.orb-orbit{position:absolute;border:1px solid #9fccb41f;border-radius:50%;width:272px;height:105px;transform:rotate(-23deg)}.orbit-two{width:290px;height:145px;transform:rotate(20deg);border-color:#9fccb412}.orbit-dot{position:absolute;left:30px;top:135px;width:5px;height:5px;border-radius:50%;background:#84a995}.primary-button{display:inline-flex;align-items:center;justify-content:center;gap:27px;padding:13px 22px;background:var(--mint);border:1px solid #c8ebd032;color:#153c28;font-weight:550;font-size:13px;border-radius:8px;min-height:46px;transition:background .2s,transform .2s}.primary-button svg{width:17px;height:17px}.primary-button:hover{background:#c0e7ca;transform:translateY(-1px)}.quiet-link{display:flex;align-items:center;gap:16px;color:#a6b8ab;font-size:12px;margin-top:10px}.quiet-link:hover{color:var(--mint)}.hero-bottom{position:absolute;bottom:22px;left:42px;right:42px;display:flex;align-items:center;justify-content:space-between;color:#849a8c;font-size:8px;letter-spacing:1.4px}.hero-bottom a{display:flex;align-items:center;font-size:8px}.section{border-top:1px solid var(--line);padding:68px clamp(28px,5.5vw,88px);scroll-margin-top:10px}.section-top{display:flex;align-items:center;justify-content:space-between;gap:15px}.eyebrow{font-size:9px;letter-spacing:1.7px;font-weight:500;color:var(--mint)}.section-index{font-size:9px;color:#8ea595;letter-spacing:.6px}.section-heading{display:grid;grid-template-columns:1.15fr 1fr;align-items:end;gap:38px;margin:22px 0 35px}h2{font-size:clamp(28px,3.2vw,40px);font-weight:450;letter-spacing:-1.5px;line-height:1.18}.section-heading>p{font-size:13px;color:var(--muted);max-width:340px}.reading-workspace{display:grid;grid-template-columns:1.12fr 1fr;gap:40px;align-items:center;margin-top:42px}.reading-visual{border:1px solid #b4d0bb20;border-radius:12px;background:#17271e;overflow:hidden}.visual-toolbar{display:flex;gap:8px;align-items:center;border-bottom:1px solid var(--line);padding:13px 18px;font-size:10px;color:#b0c4b6}.visual-toolbar svg{width:15px;height:15px}.visual-label{margin-left:auto;font-size:9px;color:#8a9f91}.reading-scene{display:flex;align-items:center;gap:27px;min-height:290px;padding:32px 25px;background:radial-gradient(ellipse at 35% 45%,#355d3c38,transparent 65%)}.book-stack{position:relative;min-width:126px;perspective:500px}.book-cover{height:190px;width:135px;transform:rotate(-7deg);padding:22px 17px 20px 22px;background:#365b46;color:#d5dfbf;box-shadow:inset 5px 0 #0002,8px 15px 30px #0003;border-radius:2px 6px 6px 2px;display:flex;flex-direction:column;justify-content:space-between;position:relative}.book-cover:after{content:'';position:absolute;inset:8px 8px 8px 12px;border:1px solid #d7e5b826;pointer-events:none}.book-cover>span{font-size:15px;line-height:1.4;letter-spacing:1px}.book-cover svg{width:28px;height:28px;stroke-width:1}.book-cover small{font-size:7px;color:#bfd0b2}.book-spine{position:absolute;inset:10px -2px -5px 8px;background:#b1b891;border-radius:3px 6px 6px 3px;transform:rotate(3deg)}.reading-annotations{display:grid;gap:22px;flex:1}.reading-annotations>span{font-size:10px;display:flex;align-items:center;gap:8px;color:#b1c7b6}.reading-annotations svg{width:15px;height:15px;color:#95bba0}.visual-footer{display:flex;gap:8px;align-items:center;padding:12px 17px;font-size:9px;color:#91a997;border-top:1px solid var(--line)}.reading-details{display:grid;gap:28px}.reading-details article{display:flex;gap:16px}.detail-number{font-size:10px;color:#6c8d77;line-height:2}.reading-details h3,.understanding-details h3,.review-details h3{font-size:15px;font-weight:500;margin-bottom:7px;letter-spacing:-.2px}.reading-details p,.understanding-details p,.review-details p{font-size:12px;color:var(--muted);line-height:1.8}.offline-note{display:flex;align-items:start;gap:15px;border-top:1px solid var(--line);margin-top:35px;padding-top:25px}.offline-note>svg{color:#8aad96;width:20px;margin-top:2px}.offline-note h3{font-size:13px;font-weight:500;margin-bottom:5px}.offline-note p{font-size:11px;color:var(--muted)}.example-workspace{border:1px solid #bddcc424;border-radius:12px;background:#14231b;overflow:hidden;box-shadow:0 16px 45px #00000012}.example-toolbar{display:flex;align-items:center;justify-content:space-between;gap:15px;padding:13px 23px;font-size:11px;color:#9fb5a6;background:#1c3024;border-bottom:1px solid var(--line)}.mini-brand{display:flex;gap:7px;align-items:center;color:#c5dbcb}.mini-brand svg{width:17px;height:17px}.example-badge{font-size:9px;color:#a9c5b2}.example-tabs{display:flex;gap:8px;padding:18px 23px 0}.example-tabs button{padding:9px 16px;border-radius:6px;font-size:12px;color:#a0b7a8}.example-tabs button[aria-selected=true]{background:#2b4735;color:#cae6d2}.example-tabs button:hover{background:#263c2e}.example-panel{padding:28px 30px 35px;min-height:325px}.example-question{display:flex;align-items:center;gap:14px;font-size:13px;margin-bottom:28px;color:#ccdbd0}.you-icon{width:28px;height:28px;display:grid;place-items:center;background:#2f4135;color:#b9cab7;border-radius:50%;font-size:8px;flex-shrink:0}.example-answer{display:flex;gap:14px}.answer-icon{width:28px;display:flex;justify-content:center;flex-shrink:0;color:var(--mint)}.answer-icon svg{width:20px;height:20px}.markdown{font-size:13px;color:#b0c3b6;line-height:1.8;max-width:620px;width:100%}.markdown h3{font-size:18px;font-weight:500;color:#e0ece2;margin:0 0 12px;letter-spacing:-.4px}.markdown p+p{margin-top:12px}.markdown strong{color:#c7e1ce;font-weight:550}.markdown blockquote{margin:20px 0 0;border-left:2px solid #729d7c;padding:4px 0 4px 14px;color:#a4c8af}.example-footer{padding:13px 24px;border-top:1px solid var(--line);font-size:10px;color:#8fa798}.concept-map{display:flex;align-items:center;gap:14px;margin:28px 0;justify-content:space-between}.map-node{display:flex;flex-direction:column;gap:8px;background:#20382a;border:1px solid #96bf9f25;border-radius:8px;padding:14px 20px;text-align:center;flex:1}.map-node>span{font-size:8px;letter-spacing:.8px;color:#9bb9a3}.map-node strong{font-size:22px;font-weight:450}.map-result{background:#a8d5b7;color:#153c28}.map-result>span,.map-result strong{color:#214d32}.map-link{font-size:22px;color:#7f9c87}math{margin-top:22px;font-size:23px;color:#c9e0cf}.quiz{display:flex;gap:10px;flex-wrap:wrap;margin-top:25px}.quiz button{border:1px solid #93b79b40;background:#1c3024;padding:10px 20px;border-radius:7px;font-size:13px;color:#c2dac9}.quiz button[aria-pressed=true]{background:#355940;border-color:#9ecda9}.quiz-feedback{font-size:12px;margin-top:18px;color:#c1b997}.quiz-feedback[data-correct=true]{color:var(--mint)}.understanding-details{display:grid;grid-template-columns:1fr 1fr;gap:40px;margin-top:33px}.review-cycle{display:grid;grid-template-columns:1fr auto 1fr auto 1fr;gap:20px;align-items:center;padding:30px 20px 15px;margin:25px 0 34px}.cycle-step{text-align:center}.cycle-icon{width:48px;height:48px;display:grid;place-items:center;border-radius:50%;margin:0 auto 16px;background:#213c2b;color:#b5d9bf;font-size:27px;font-weight:300}.cycle-icon svg{width:24px;height:24px}.cycle-step h3{font-size:17px;font-weight:450;margin-bottom:7px}.cycle-step p{font-size:11px;color:var(--muted)}.cycle-arrow{color:#668773;font-size:26px;margin-top:-37px}.cycle-return{grid-column:1/-1;border:1px solid #7caa8b35;border-top:0;border-radius:0 0 25px 25px;height:29px;margin:0 45px 10px;position:relative;text-align:center}.cycle-return>span{display:inline-block;font-size:10px;position:relative;top:17px;padding:0 15px;background:var(--surface);color:#91b09a}.review-details{display:grid;grid-template-columns:1fr 1fr;gap:40px;margin:42px 0 38px}.notes-progress{display:grid;grid-template-columns:1fr 1fr;gap:25px}.notes-progress article{padding:24px 25px 27px;border:1px solid #accbb720;background:#192a224a;border-radius:10px}.notes-progress .eyebrow{font-size:8px}.notes-progress h3{font-size:19px;font-weight:450;letter-spacing:-.6px;margin:14px 0 10px}.notes-progress p{font-size:12px;color:var(--muted)}.inside h2{margin-top:22px}.product-gallery{display:grid;grid-template-columns:1fr 1fr 1fr;gap:25px;margin-top:38px}.screen-frame{height:345px;border:1px solid #accbb730;border-radius:14px;overflow:hidden;position:relative;background:#101c17}.screen-frame:after{content:'';position:absolute;inset:auto 0 0;height:30px;background:linear-gradient(transparent,#101c1766);pointer-events:none}.screen-frame img{width:100%;height:auto;display:block}.product-gallery figcaption{margin-top:17px}.product-gallery h3{font-size:14px;font-weight:500}.product-gallery p{font-size:11px;color:var(--muted);margin-top:5px}.closing{text-align:center;padding:58px 24px 60px;border-top:1px solid var(--line);background:radial-gradient(ellipse at 50% 100%,#31553f30,transparent 60%)}.closing-mark{color:var(--mint)}.closing-mark svg{width:28px;height:28px;stroke-width:1}.closing h2{font-size:35px;margin:20px 0 16px}.closing p{font-size:13px;color:var(--muted);margin-bottom:25px}footer{border-top:1px solid var(--line);margin:0 clamp(28px,5.5vw,88px);padding:22px 0;display:flex;align-items:center;gap:18px;font-size:10px;color:#95ad9c}.footer-brand{font-size:22px}.footer-brand svg{width:22px;height:22px}footer button{font-size:10px;color:#a7bdad;margin-left:auto}.mobile-nav{display:none}dialog{border:1px solid #9dc7a843;background:#192a22;color:var(--ink);border-radius:16px;max-width:430px;width:calc(100% - 36px);padding:40px;box-shadow:0 30px 120px #0005}dialog::backdrop{background:#040c08b3;backdrop-filter:blur(6px)}dialog h2{font-size:26px;margin-bottom:20px}dialog p{font-size:13px;color:#b1c5b8;margin-top:14px}.dialog-close{position:absolute;right:9px;top:8px;font-size:25px;color:#abc3b3;min-width:44px}.skip-link{position:fixed;z-index:100;top:-100px;left:20px;background:var(--mint);color:#143c26;padding:12px}.skip-link:focus{top:10px}.noscript{padding:20px;background:var(--raised);color:var(--ink);font-size:13px}html:not(.enhanced) .example-panel[hidden]{display:block!important}html:not(.enhanced) .example-tabs{display:none}@keyframes orb-drift{to{transform:rotate(12deg) translateY(5px)}}
@media(max-width:1100px){.desktop-window{margin:0;border-radius:0;border:0;grid-template-columns:180px minmax(0,1fr)}.sidebar{padding:30px 10px 20px}.sidebar nav a{font-size:11px}.sidebar-label{font-size:8px}.section{padding:55px 36px}.reading-workspace{grid-template-columns:1fr;gap:30px}.reading-details{grid-template-columns:1fr 1fr;gap:22px}.reading-details article:last-child{grid-column:1/-1}.reading-details article:last-child p{max-width:450px}.reading-scene{justify-content:center;min-height:260px}.reading-annotations{flex:0 1 200px}.section-heading{gap:25px}.screen-frame{height:285px}.concept-map{gap:10px}.map-node{padding:12px 10px}.product-gallery{gap:16px}.hero{min-height:600px}}
@media(max-width:760px){:root{scroll-padding-top:20px}.desktop-window{display:block}.titlebar{height:60px;padding:0 23px;top:0}.wordmark{font-size:25px}.wordmark svg{width:24px;height:24px}.window-caption,.sidebar{display:none}.header-open{font-size:11px;gap:9px}.hero{min-height:570px;height:calc(100svh - 60px);max-height:850px;padding:35px 20px 78px}h1{font-size:clamp(37px,7.8vw,56px);letter-spacing:-1.9px;line-height:1.14;margin:22px 0 16px}.hero-copy{font-size:13px}.orb-stage{height:215px;margin:6px 0 7px}.study-orb{width:140px;height:140px}.primary-button{font-size:13px}.hero-bottom{bottom:23px;justify-content:center}.hero-bottom>span{display:none}.hero-bottom a{font-size:8px}.section{padding:43px 24px;scroll-margin-top:8px}.eyebrow{font-size:8px;letter-spacing:1.3px}.section-index{font-size:8px}.section-heading{display:block;margin:21px 0 28px}.section-heading>p{font-size:13px;max-width:480px;margin-top:17px}h2{font-size:31px;letter-spacing:-1.2px}.reading-workspace{margin-top:28px;gap:27px}.reading-details{grid-template-columns:1fr;gap:24px}.reading-details article:last-child{grid-column:auto}.reading-details h3{font-size:15px}.reading-details p{font-size:13px}.reading-scene{padding:28px 20px;gap:22px;min-height:265px}.book-stack{min-width:117px}.book-cover{width:120px;height:178px;padding:20px}.book-cover>span{font-size:13px}.book-cover small{font-size:6px}.reading-annotations{gap:22px}.reading-annotations>span{font-size:9px;gap:6px}.reading-annotations svg{width:14px;height:14px}.visual-footer{font-size:9px}.offline-note{margin-top:27px;padding-top:22px}.offline-note h3{font-size:13px}.offline-note p{font-size:12px}.example-toolbar{padding:12px 14px;font-size:9px;gap:8px}.example-badge{display:none}.mini-brand{font-size:11px}.example-tabs{padding:13px 10px 0;gap:3px}.example-tabs button{font-size:10px;padding:8px;flex:1}.example-panel{padding:24px 16px 28px;min-height:420px}.example-question{gap:10px;font-size:12px;align-items:start;margin-bottom:25px}.you-icon{width:25px;height:25px}.example-question p{padding-top:2px}.example-answer{gap:10px}.answer-icon{width:25px}.markdown{font-size:13px}.markdown h3{font-size:17px}.markdown blockquote{padding-left:12px;font-size:12px}.example-footer{font-size:9px;padding:12px 16px}.concept-map{display:grid;grid-template-columns:1fr auto 1fr;gap:10px}.map-node{min-width:0;padding:13px 8px}.map-node strong{font-size:21px}.map-node>span{font-size:7px}.map-node.map-result{grid-column:1/-1}.map-link:nth-child(4){display:none}.map-result:before{content:'↓';font-size:17px;color:#315d42}.quiz{gap:7px}.quiz button{padding:9px 13px;font-size:12px}.quiz-feedback{font-size:12px}math{font-size:21px}.understanding-details{grid-template-columns:1fr;gap:23px;margin-top:28px}.understanding-details p,.review-details p{font-size:13px}.review-cycle{gap:10px;padding:22px 0 15px;margin:20px 0 30px}.cycle-icon{width:42px;height:42px}.cycle-step h3{font-size:15px}.cycle-step p{font-size:10px;line-height:1.7;max-width:95px;margin:auto}.cycle-arrow{font-size:19px}.cycle-return{margin:0 20px 10px}.cycle-return>span{font-size:9px;padding:0 6px}.review-details{grid-template-columns:1fr;gap:23px;margin-top:37px}.notes-progress{grid-template-columns:1fr;gap:16px}.notes-progress article{padding:23px}.notes-progress p{font-size:13px}.inside .section-top{align-items:start}.inside .section-index{max-width:115px;text-align:right;line-height:1.6}.inside h2{max-width:260px}.product-gallery{grid-template-columns:repeat(3,minmax(220px,1fr));overflow-x:auto;scroll-snap-type:x mandatory;padding-bottom:18px;gap:20px;margin-right:-24px;padding-right:24px}.product-gallery figure{scroll-snap-align:start}.screen-frame{height:350px}.product-gallery h3{font-size:14px}.product-gallery p{font-size:12px}.closing{padding:45px 24px}.closing h2{font-size:30px}.closing p{font-size:12px;max-width:250px;margin:0 auto 24px}footer{margin:0 24px;padding:18px 0 105px;gap:13px;font-size:9px}.footer-brand{font-size:21px}.footer-brand svg{width:21px;height:21px}footer button{font-size:9px}.mobile-nav{display:flex;position:fixed;bottom:0;left:0;right:0;z-index:20;justify-content:space-around;border-top:1px solid #9ec6a62a;background:#172a1ff2;backdrop-filter:blur(20px);padding:7px 8px calc(9px + env(safe-area-inset-bottom))}.mobile-nav a{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;min-width:55px;min-height:48px;border-radius:10px;padding:6px;color:#9db8a6;font-size:9px}.mobile-nav svg{width:20px;height:20px}.mobile-nav a[aria-current]{background:#2a4534;color:#c1e7cd}.mobile-nav a:last-child{color:#c7e9d1}.mobile-nav a:last-child svg{width:19px;height:19px}}
@media(max-width:360px){.section{padding-left:18px;padding-right:18px}.reading-scene{padding:24px 16px;gap:14px}.reading-annotations>span{font-size:8px}.reading-annotations svg{width:12px}.reading-visual .visual-toolbar{font-size:9px}.example-tabs button{font-size:9px}.cycle-return>span{font-size:8px}.hero{padding-left:16px;padding-right:16px}.orb-stage{width:285px}.mobile-nav a{min-width:50px}.product-gallery{margin-right:-18px;padding-right:18px}}
@media(prefers-reduced-motion:reduce){:root{scroll-behavior:auto}*,*::before,*::after{animation:none!important;transition:none!important}}

/* A quieter introduction: familiar marks, short copy, and useful controls */
.app-logo{width:24px;height:24px;display:block;flex-shrink:0;border-radius:6px}
.wordmark .app-logo{width:29px;height:29px}
.sidebar nav .app-logo{width:19px;height:19px;border-radius:4px}
.primary-button .app-logo{width:23px;height:23px}
.primary-button{gap:12px}
.primary-button>svg{margin-left:10px}
.reading-workspace{grid-template-columns:1fr;max-width:720px;margin:30px auto 0}
.reading-scene{min-height:290px;gap:48px}
.reading-annotations{flex:0 1 230px;gap:28px}
.reading-annotations>span{font-size:13px}
.book-cover>span{font-size:20px;line-height:1.3;letter-spacing:-.5px}
.section-heading{align-items:center;margin-top:0}
.section-heading>p{font-size:14px}
.example-badge{font-size:11px}
.example-panel{min-height:280px}
.example-toolbar{font-size:12px}
.cycle-step h3{margin-bottom:0}
.cycle-return>span{font-size:12px}
.notes-progress{margin-top:40px}
.notes-progress article{padding-top:20px}
.notes-progress h3{margin-top:0}
.screen-disclosure{font-size:12px;color:var(--muted);margin-top:12px}
.inside h2{margin-top:0}
.closing{padding:38px 24px}
footer{justify-content:space-between}
@media(max-width:760px){
 .titlebar{position:relative}
 .hero{padding-top:25px;padding-bottom:40px;min-height:570px}
 .hero h1{font-size:clamp(35px,8vw,52px);margin-top:0}
 .section-heading>p{font-size:13px}
 .reading-scene{gap:24px;min-height:250px}
 .reading-annotations>span{font-size:10px}
 .book-cover>span{font-size:18px}
 .example-panel{min-height:340px}
 .example-toolbar{font-size:10px}
 .example-badge{display:inline;font-size:9px}
 .cycle-return>span{font-size:10px}
 .mobile-nav .app-logo{width:21px;height:21px;border-radius:4px}
}
@media(max-width:360px){.reading-scene{gap:18px}.reading-annotations>span{font-size:9px}.example-toolbar{gap:6px}.example-badge{font-size:8px}.cycle-return>span{font-size:9px}}
/* Long-form reading lives on its own page */
.hero-links{display:flex;align-items:center;justify-content:center;gap:28px}
.footer-learn{display:flex;align-items:center;font-size:11px;color:var(--muted);margin-left:auto}
footer .footer-learn+button{margin-left:14px}
.product-article{max-width:920px;margin:0 auto;padding:48px clamp(26px,5vw,74px) 55px}
.article-heading{margin-bottom:32px}
.article-back{display:inline-flex;align-items:center;font-size:12px;color:var(--muted);min-height:44px}
.article-back:hover{color:var(--mint)}
.article-heading h1{font-size:clamp(32px,3.5vw,47px);font-weight:450;line-height:1.17;letter-spacing:-1.6px;margin:26px 0 0;max-width:700px;text-wrap:balance}
.article-body{font-size:16px;line-height:1.85;color:#c2d1c6;max-width:68ch}
.article-body p{line-height:1.9;margin-bottom:21px}
.article-introduction>p:first-child{font-size:18px;color:#e0e9e2;line-height:1.8}
.article-body h2{font-size:29px;letter-spacing:-.9px;line-height:1.3;color:var(--ink);margin:48px 0 22px;text-wrap:balance}
.article-body h3{font-size:20px;font-weight:500;line-height:1.4;letter-spacing:-.35px;color:var(--ink);margin:32px 0 14px}
.article-body section{scroll-margin-top:28px}
.article-contents{border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:12px 0;margin:30px 0 38px;font-size:13px}
.article-contents summary{cursor:pointer;color:#bed8c6;padding:10px 0;min-height:44px;list-style-position:inside}
.article-contents nav{display:grid;gap:4px;padding:6px 0 12px 17px}
.article-contents a{display:flex;align-items:center;color:var(--muted);font-size:13px;min-height:36px}
.article-contents a:hover{color:var(--mint)}
.article-end{display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-top:40px;padding-top:28px;border-top:1px solid var(--line)}
.article-page .sidebar nav a[aria-current=page]{background:#294334;color:#c0e5ca}
.article-page .article-mobile-nav{justify-content:space-evenly}
.article-page dialog .primary-button{margin-top:22px}
@media(max-width:760px){.product-article{padding:22px 25px 40px}.article-heading h1{font-size:36px;letter-spacing:-1.4px;margin-top:20px}.article-heading{margin-bottom:28px}.article-body{font-size:15px}.article-introduction>p:first-child{font-size:17px}.article-body h2{font-size:27px;margin-top:37px}.article-body h3{font-size:19px}.article-body p{margin-bottom:20px}.article-end{align-items:start;flex-direction:column;gap:12px}.hero-links{gap:24px}.footer-learn{font-size:10px}footer .footer-learn+button{margin-left:0}}
@media(max-width:360px){.product-article{padding-inline:21px}.article-heading h1{font-size:32px}.article-body h2{font-size:25px}footer{gap:8px}}
/* Research paper: restrained typography and permanent, icon-free contents */
.research-page main{background:#f7f7f2;color:#25352c}
.research-paper{max-width:1000px;padding:48px clamp(26px,5vw,78px) 55px}
.research-paper .article-heading{border-bottom:1px solid #cbd2ca;padding-bottom:26px;margin-bottom:30px}
.research-paper .article-back{color:#4d6456;font-size:12px}
.research-paper .paper-meta{font:12px/1.6 'Segoe UI',system-ui,sans-serif;color:#526958;margin-top:24px}
.research-paper .article-heading h1{font-family:Georgia,'Times New Roman',serif;font-size:clamp(32px,3.4vw,44px);font-weight:400;letter-spacing:-1px;line-height:1.2;margin-top:15px;max-width:790px;text-wrap:balance;color:#1d3426}
.paper-status{font:12px/1.7 'Segoe UI',system-ui,sans-serif;color:#5a6d5e;margin-top:19px}
.research-paper .article-body{max-width:none;font:16px/1.85 Georgia,'Times New Roman',serif;color:#2c3a30}
.research-paper .article-body p{line-height:1.85;margin-bottom:19px}
.research-paper .article-body h2{font:400 29px/1.25 Georgia,'Times New Roman',serif;letter-spacing:-.6px;color:#203b29;margin:43px 0 19px}
.research-paper .article-body h3{color:#213b2a;font-family:Georgia,'Times New Roman',serif;font-size:21px;letter-spacing:-.3px}
.research-paper .paper-abstract{padding-bottom:16px;border-bottom:1px solid #d6dcd3}
.research-paper .paper-abstract h2{font-size:23px;margin-top:0}
.research-paper .paper-abstract p{font-size:15px}
.paper-contents{padding:22px 0 27px;border-bottom:1px solid #d6dcd3;margin:0 0 35px}
.research-paper .paper-contents h2{font:600 13px/1.5 'Segoe UI',system-ui,sans-serif;margin:0 0 12px;letter-spacing:0}
.paper-contents>div{display:grid;grid-template-columns:1fr 1fr;column-gap:25px}
.paper-contents a{display:flex;align-items:center;font:12px/1.6 'Segoe UI',system-ui,sans-serif;color:#3c5b46;padding:6px 0;min-height:34px;text-decoration:none;border-bottom:1px solid transparent}
.paper-contents a:hover{color:#133d24;text-decoration:underline;text-underline-offset:4px}
.paper-citation{color:#2c6a48;font-family:'Segoe UI',system-ui,sans-serif;font-size:.8em;vertical-align:super;white-space:nowrap;text-decoration:none}
.paper-citation:hover{text-decoration:underline}
.paper-figure{margin:31px 0 35px;padding:23px 20px;border-top:1px solid #cbd3c8;border-bottom:1px solid #cbd3c8;background:#fbfbf8}
.research-paper .paper-figure .figure-title{font:600 14px/1.6 'Segoe UI',system-ui,sans-serif;letter-spacing:0;margin:0 0 18px;color:#284832}
.paper-figure>img{display:block;max-width:100%;height:auto;width:100%;background:#fbfbf8}
.paper-figure figcaption{font:12px/1.8 'Segoe UI',system-ui,sans-serif;color:#526154;margin-top:15px}
.paper-figure figcaption strong{font-weight:600;color:#293f2e;margin-right:6px}
.figure-download{display:inline-flex;align-items:center;font:11px/1.6 'Segoe UI',system-ui,sans-serif;color:#326247;margin-top:11px;min-height:36px;text-decoration:underline;text-underline-offset:3px}
.paper-table-wrap{overflow-x:auto;margin:24px 0 8px}
.paper-table-wrap table{width:100%;border-collapse:collapse;text-align:left;font:12px/1.7 'Segoe UI',system-ui,sans-serif;color:#344f3c}
.paper-table-wrap caption{text-align:left;color:#526957;font-size:11px;padding-bottom:9px}
.paper-table-wrap th{font-weight:600}
.paper-table-wrap th,.paper-table-wrap td{border-bottom:1px solid #dce2d9;padding:9px 10px 9px 0;vertical-align:top}
.paper-table-wrap thead th{border-top:1px solid #7e9581;border-bottom:1px solid #7e9581;color:#2e4c36}
.paper-study-flow{display:grid;grid-template-columns:1fr 1fr;gap:24px 35px;list-style:none;margin:6px 0 0;padding:0;font-family:'Segoe UI',system-ui,sans-serif}
.paper-study-flow li{padding:18px 15px;background:#edf1e9;border:1px solid #b5c7b5;position:relative;display:flex;flex-direction:column;gap:8px}
.paper-study-flow li:nth-child(odd):after{content:'→';position:absolute;right:-28px;top:25px;font-size:20px;color:#54755a}
.paper-study-flow li strong{font-size:13px;font-weight:600;color:#294f34}
.paper-study-flow li span{font-size:11px;color:#5d7260}
.model-return{font:11px/1.6 'Segoe UI',system-ui,sans-serif;color:#637f67;border:1px solid #a7bda7;border-top:0;padding:10px;text-align:center;margin:0 20px}
.paper-references ol{list-style:none;padding:0;margin:24px 0}
.paper-references li{display:flex;gap:15px;margin-bottom:21px;font:13px/1.85 'Segoe UI',system-ui,sans-serif;overflow-wrap:anywhere}
.reference-number{flex-shrink:0;color:#527158;font-size:12px}
.paper-references a,.paper-data-link{color:#2c6240;text-decoration:underline;text-underline-offset:3px}
.paper-references em{font-style:italic}
.reference-doi{display:inline-block;font-size:11px}
.paper-disclosure{font:12px/1.8 'Segoe UI',system-ui,sans-serif;color:#5d6e5f;border-left:2px solid #b4c5b3;padding-left:16px;margin-top:27px}
.research-paper .article-end{border-color:#cbd2c6}
.research-page footer{border-color:#d2d9cc;color:#46634e}
.research-page footer .footer-brand{color:#284833}
.research-page footer button{color:#44664d}
.research-page .paper-citation:focus-visible,.research-page .article-body a:focus-visible{outline-color:#3f7850}
.research-page .article-body section,.paper-references li{scroll-margin-top:25px}
@media(max-width:760px){
 .research-paper{padding:25px 25px 40px}
 .research-paper .article-heading h1{font-size:35px;letter-spacing:-.8px}
 .research-paper .paper-meta{font-size:11px;margin-top:19px}
 .paper-status{font-size:11px;max-width:280px}
 .research-paper .article-body{font-size:16px}
 .research-paper .article-body h2{font-size:27px;margin-top:36px}
 .research-paper .paper-abstract h2{font-size:23px}
 .research-paper .paper-abstract p{font-size:15px}
 .paper-contents>div{grid-template-columns:1fr}
 .paper-contents a{font-size:12px;min-height:38px}
 .paper-figure{padding:18px 0;margin:26px 0 30px;background:transparent}
 .paper-figure figcaption{font-size:11px}
 .paper-table-wrap table{font-size:11px}
 .paper-table-wrap th,.paper-table-wrap td{padding-right:8px}
 .research-paper .paper-figure .figure-title{font-size:13px}
 .paper-study-flow{gap:19px;grid-template-columns:1fr}
 .paper-study-flow li:nth-child(odd):after{content:none}
 .paper-study-flow li:not(:last-child):after{content:'↓';position:absolute;right:50%;top:auto;bottom:-24px;font-size:18px;color:#54755a}
 .paper-study-flow li{padding:14px 15px}
 .paper-study-flow li span{font-size:12px}
 .paper-references li{font-size:12px;gap:10px}
 .paper-disclosure{font-size:11px}
}
@media print{
 .research-page{background:white;color:black}
 .research-page .titlebar,.research-page .sidebar,.research-page .mobile-nav,.research-page footer,.research-page .article-back,.research-page .article-end,.research-page .figure-download{display:none}
 .research-page .desktop-window{display:block;border:0;margin:0;box-shadow:none}
 .research-page main{background:white}
 .research-paper{max-width:none;padding:0}
 .research-paper .article-body{font-size:11pt;color:black}
 .research-paper .article-body p{line-height:1.55}
 .research-paper .article-heading h1{font-size:23pt}
 .research-paper .paper-figure,.research-paper table{break-inside:avoid}
 .research-paper h2,.research-paper h3{break-after:avoid}
}
.paper-figure picture,.paper-figure picture img{display:block;width:100%;height:auto;background:#fbfbf8}
@media(min-width:761px){.paper-study-flow{grid-template-columns:repeat(4,minmax(0,1fr));gap:22px}.paper-study-flow li{padding:16px 11px}.paper-study-flow li:not(:last-child):after{content:'→';position:absolute;right:-20px;top:25px;font-size:18px;color:#54755a}}
/* The introductory scene is playful; subsequent sections keep their quiet surfaces. */
.sidebar nav .nav-meet{color:#d1ead8;background:#213e2c}
.sidebar nav .nav-meet:hover{background:#2b4c36}
.mobile-nav .nav-meet{color:#d5efdd;background:#2b4935}
.mobile-nav a{min-width:90px}
.mobile-nav .app-logo{width:22px;height:22px}
.game-hero{isolation:isolate;overflow:hidden;min-height:650px;height:calc(100svh - 94px);max-height:930px;padding:26px 24px 32px;justify-content:center;background:radial-gradient(ellipse at 50% 56%,#204d3d69,transparent 53%),radial-gradient(ellipse at 12% 70%,#122d3a8a,transparent 55%),#0d1c16}
.game-hero:before{content:'';position:absolute;inset:0;pointer-events:none;background:linear-gradient(#0d1c168a 0%,transparent 37%,transparent 72%,#0d1c16a8 100%);z-index:1}
.orbit-background{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;z-index:0}
.game-hero h1{position:relative;z-index:2;font-size:clamp(40px,4.6vw,62px);letter-spacing:-2.6px;margin:0;line-height:1.08;text-shadow:0 3px 25px #0b1c14,0 0 45px #0b1c14}
.game-hero h1>span{color:#b4dfc2}
.orb-playground{position:relative;width:min(590px,100%);height:306px;flex-shrink:0;z-index:2;margin-top:4px;--globe-size:230px}
.globe-focus{position:absolute;left:50%;top:45%;width:var(--globe-size);height:var(--globe-size);transform:translate(-50%,-50%);border-radius:50%;touch-action:pan-y;cursor:grab;user-select:none;-webkit-user-select:none;outline-offset:8px}
.globe-focus.dragging{cursor:grabbing}
.globe-fallback{position:absolute;inset:0;border-radius:50%;background:radial-gradient(ellipse at 35% 31%,#8cb696aa,transparent 27%),radial-gradient(ellipse at 72% 59%,#618b6999,transparent 29%),radial-gradient(ellipse at 35% 23%,#8acbbd,#397b83 45%,#123241 80%,#133b40);box-shadow:inset -28px -14px 38px #041a25a8,inset 5px 8px 20px #d4f3db6b,0 0 45px #3d9a9b38;transition:opacity .3s}
.webgl-orb-ready .globe-fallback{opacity:0}
.globe-book{position:absolute;inset:0;display:grid;place-items:center;pointer-events:none;color:#e8ffeddd;filter:drop-shadow(0 2px 2px #092d28) drop-shadow(0 0 13px #b4e8c959)}
.globe-book svg{width:54px;height:54px;stroke-width:1;opacity:.85}
.orbit-pickup{position:absolute;left:50%;top:45%;width:44px;height:44px;min-height:44px;border-radius:50%;display:grid;place-items:center;background:none;padding:0;z-index:3;opacity:var(--light-strength,1);transition:opacity .2s}
.orbit-pickup:before{content:'';position:absolute;inset:12px;border-radius:50%;background:radial-gradient(circle at 35% 30%,#fbffe3,#b8e6b9 28%,#5fbba3 65%,#204f55);box-shadow:0 0 12px #b2ffd8a8,0 0 28px #7bdec561}
.orbit-pickup span{font-size:16px;font-weight:400;color:#1e6551;position:relative;line-height:1;z-index:1}
.orbit-pickup:hover:before,.orbit-pickup:focus-visible:before{box-shadow:0 0 15px #dbffcf,0 0 35px #7bdec599}
.orbit-pickup:disabled{opacity:0;pointer-events:none}
.game-toolbar{position:absolute;bottom:0;left:0;right:0;display:flex;justify-content:center;align-items:center;gap:7px;color:#accdb7}
.game-score{display:flex;align-items:center;gap:8px;padding:6px 12px;background:#0b2019b8;border:1px solid #a1d5b322;border-radius:20px;min-height:34px;font-size:10px;font-variant-numeric:tabular-nums}
.game-score strong{font-size:16px;line-height:1;font-weight:500;color:#def4df;min-width:13px}
.motion-toggle,.game-reset{min-width:36px;min-height:36px;border:1px solid #a1d5b322;border-radius:50%;display:grid;place-items:center;color:#a7cbb4;background:#102a1e8a;padding:8px}
.motion-toggle svg{width:16px;height:16px;stroke:currentColor;stroke-width:1.5;fill:none}
.game-reset{font-size:20px;line-height:1;padding:0}
.motion-toggle:hover,.game-reset:hover{background:#294d36}
.orb-instructions{position:relative;z-index:2;font-size:11px;color:#a5c2af;margin:11px 0 20px;line-height:1.6}
.hero-actions{position:relative;z-index:2;display:flex;gap:14px;justify-content:center;align-items:stretch}
.hero-actions .primary-button{min-width:176px;min-height:48px;gap:12px;font-size:13px}
.hero-actions .learn-button{border:1px solid #a8d5b7;background:#244832;color:#d9f2df;box-shadow:none}
.hero-actions .learn-button:hover{background:#365e43}
.game-bursts{position:absolute;inset:0;pointer-events:none;z-index:5;overflow:visible}
.points-burst{position:absolute;transform:translate(-50%,-50%);font-size:20px;font-weight:550;color:#e3ffc9;text-shadow:0 0 16px #8fedbd;animation:points-rise .8s ease-out forwards;white-space:nowrap}
.points-burst i{position:absolute;left:50%;top:50%;width:4px;height:4px;border-radius:50%;background:#cfffb5;box-shadow:0 0 7px #9fffd3;animation:point-spark .65s ease-out forwards}
.sr-only{position:absolute;width:1px;height:1px;padding:0;overflow:hidden;clip-path:inset(50%);white-space:nowrap;border:0}
html:not(.enhanced) .game-toolbar,html:not(.enhanced) .orbit-pickup,html:not(.enhanced) .orb-instructions{display:none}
@keyframes points-rise{from{opacity:1;transform:translate(-50%,-30%)}to{opacity:0;transform:translate(-50%,-230%)}}
@keyframes point-spark{from{opacity:1;transform:translate(0,0)}to{opacity:0;transform:translate(var(--dx),var(--dy))}}
@media(max-width:760px){
 .mobile-nav a{min-width:80px;font-size:10px;min-height:50px}
 .game-hero{min-height:630px;height:calc(100svh - 60px);padding:25px 16px 45px;max-height:870px}
 .game-hero h1{font-size:clamp(34px,7.6vw,49px);letter-spacing:-1.8px;line-height:1.13}
 .orb-playground{height:286px;margin-top:6px}
 .globe-book svg{width:42px;height:42px}
 .hero-actions{gap:10px;width:100%;max-width:360px}
 .hero-actions .primary-button{min-width:0;flex:1;padding:12px 12px;font-size:12px;gap:8px}
 .hero-actions .primary-button>.app-logo{width:20px;height:20px}
 .hero-actions .primary-button>svg{margin-left:0;width:15px;height:15px}
 .orb-instructions{font-size:10px;margin-bottom:19px}
 .game-toolbar{gap:6px}
}
@media(max-width:360px){.hero-actions .primary-button{font-size:11px;padding-inline:10px}.mobile-nav a{min-width:75px}.game-hero{min-height:610px}.orb-playground{height:268px}}
@media(prefers-reduced-motion:reduce){.points-burst,.points-burst i{display:none}.globe-fallback{transition:none}}
@media(max-width:760px){.game-hero{min-height:600px}}
@media(max-width:360px){.game-hero{min-height:590px}}
.motion-toggle,.game-reset{min-width:44px;min-height:44px}
@media(max-width:760px) and (max-height:720px){.game-hero{min-height:540px;height:calc(100svh - 60px);padding:20px 16px 34px}.orb-playground{height:260px;width:min(390px,100%)}.orb-instructions{margin-bottom:16px}}
.hero-actions .primary-button{white-space:nowrap}
@media(max-width:360px){.hero-actions .primary-button:first-child>svg{display:none}}