/* BFY studio — shared presentation for the home and Hoca Kiti pages. */
:root{--paper:#f6f4ee;--white:#fffefa;--ink:#203d35;--muted:#65716a;--line:#d9ded4;--green:#214e41;--lime:#d9edaf;--gold:#e9be64;--clay:#c16b4b;--serif:'Fraunces',Georgia,serif;--sans:'Plus Jakarta Sans',Arial,sans-serif;--radius:20px}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:15px;line-height:1.7;-webkit-font-smoothing:antialiased}body:has(dialog[open]){overflow:hidden}button,input{font:inherit}button,a{-webkit-tap-highlight-color:transparent}button{color:inherit;cursor:pointer}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}button{border:0}p{margin:0 0 20px;color:var(--muted)}h1,h2,h3{margin:0;font-weight:600;line-height:1.12;letter-spacing:-.045em}h1{font-size:clamp(48px,5.3vw,78px)}h2{font-size:clamp(34px,3.6vw,49px)}h3{font-size:24px}em{font-family:var(--serif);font-weight:500}h1 em,h2 em{color:var(--clay)}[hidden]{display:none!important}:focus-visible{outline:3px solid var(--clay);outline-offset:5px}::selection{background:var(--lime);color:var(--ink)}.container{width:min(1240px,calc(100% - 96px));margin-inline:auto}.section{padding-block:96px}.eyebrow{font-size:10px;font-weight:800;letter-spacing:.15em;line-height:1.5;text-transform:uppercase;color:var(--muted);display:block;margin-bottom:20px}.section-heading{display:flex;justify-content:space-between;align-items:flex-end;gap:36px;margin-bottom:38px}.section-heading>p{font-size:14px;margin-bottom:3px}.section-heading h2+p{margin-top:20px;margin-bottom:0}.small{font-size:12px;margin-top:20px}.button-row{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.button{display:inline-flex;justify-content:center;align-items:center;gap:24px;min-height:52px;padding:13px 22px;background:var(--green);color:white;border:1px solid var(--green);border-radius:7px;font-size:12px;font-weight:700;line-height:1.6;transition:background .2s,transform .2s,box-shadow .2s}.button:hover{background:#163b30;box-shadow:0 6px 16px #163b3017;transform:translateY(-2px)}.button>span:last-child{font-size:18px;line-height:1}.button-outline{background:transparent;color:var(--ink);border-color:#bbc7bc}.button-outline:hover{background:#e9eee3}.button-light{background:var(--lime);color:var(--ink);border-color:var(--lime)}.button-light:hover{background:#e7f5c9}.button-small{min-height:44px;padding:10px 15px;font-size:11px;gap:12px}.text-link{display:inline-flex;align-items:center;gap:16px;background:none;padding:5px 0;font-size:12px;font-weight:700;border-bottom:1px solid currentColor;line-height:1.6}.text-link:hover{color:var(--clay)}.light-link{color:var(--lime)}.live-dot{display:inline-block;background:#57965d;width:6px;height:6px;margin:0 9px 1px 0;border-radius:50%}.skip-link{position:fixed;top:-100px;left:20px;z-index:300;background:var(--ink);color:white;padding:15px}.skip-link:focus{top:10px}
/* Navigation */
.site-header{position:sticky;top:0;z-index:50;background:rgba(246,244,238,.95);backdrop-filter:blur(16px);border-bottom:1px solid var(--line)}.header-inner{width:min(1360px,calc(100% - 64px));height:88px;margin:auto;display:flex;align-items:center;justify-content:space-between;gap:25px}.brand{display:flex;align-items:center;gap:10px;font-size:13px;letter-spacing:-.03em;line-height:1.3}.brand strong{font-weight:800}.brand img{object-fit:contain;border-radius:50%}.header-inner nav{display:flex;align-items:center;gap:30px;font-size:12px;font-weight:600}.header-inner nav>a:not(.nav-cta):hover,.header-inner nav>a[aria-current]{color:var(--clay)}.nav-cta{background:var(--ink);color:white;padding:10px 15px;border-radius:6px;display:flex;gap:22px;align-items:center}.nav-more{position:relative}.nav-more summary{cursor:pointer;list-style:none;display:flex;gap:10px}.nav-more summary::-webkit-details-marker{display:none}.nav-more>div{position:absolute;right:-22px;top:35px;width:220px;background:var(--white);padding:12px;border:1px solid var(--line);border-radius:12px;box-shadow:0 20px 40px #15352b18}.nav-more a{display:block;padding:9px 12px;border-radius:5px}.nav-more a:hover{background:#edf0e8}.menu-toggle{display:none}
/* Homepage opening */
.home-hero{display:grid;grid-template-columns:1.05fr 1fr;gap:56px;align-items:center;padding-block:60px}.home-hero .hero-copy{padding-block:18px}.hero-copy h1{margin-bottom:28px}.home-hero h1 em{display:block;margin-top:1px}.hero-description{font-size:15px;max-width:420px;line-height:1.9;margin-bottom:30px}.teacher-sign{display:flex;align-items:center;gap:12px;margin-top:38px;font-size:11px;max-width:350px}.teacher-sign img{object-fit:cover;object-position:50% 25%;border-radius:50%;width:42px;height:42px;filter:saturate(.65)}.teacher-sign span strong,.teacher-sign small{display:block}.teacher-sign small{font-size:10px;color:var(--muted);margin-top:3px}.teacher-sign>span:last-child{margin-left:auto;font-size:18px}.physics-stage{position:relative;min-width:0;height:550px;border-radius:160px 160px 18px 18px;background:#e5ebdf;overflow:hidden;border:1px solid #d9e0d2}.stage-grid{position:absolute;inset:0;opacity:.4;background-image:linear-gradient(#bac9b63b 1px,transparent 1px),linear-gradient(90deg,#bac9b63b 1px,transparent 1px);background-size:48px 48px;mask-image:linear-gradient(transparent,black 70%)}.stage-top{position:absolute;top:50px;left:40px;right:40px;display:flex;justify-content:space-between;align-items:center;font-size:8px;font-weight:700;letter-spacing:.12em;color:#6c7f6b;z-index:2}.stage-index{font-size:8px}#physics-canvas{position:absolute;inset:0;width:100%;height:100%;opacity:0;transition:opacity .6s}#physics-stage.ready #physics-canvas{opacity:1}.scene-label{position:absolute;left:35px;bottom:75px;z-index:2;pointer-events:none}.scene-label>span{font-size:8px;letter-spacing:.15em;font-weight:700}.scene-label strong{font-size:38px;line-height:1.03;font-weight:500;letter-spacing:-.035em;display:block;margin-top:10px}.scene-label em{color:#74835c}.stage-bottom{position:absolute;bottom:20px;left:30px;right:25px;display:flex;justify-content:space-between;align-items:center;gap:12px;font-size:10px;z-index:2;color:#627461}#motion-toggle{display:flex;align-items:center;gap:9px;padding:8px 10px;min-height:36px;background:#f6f4eecc;border:1px solid #c5d0be;border-radius:30px;font-size:10px}.scene-fallback{position:absolute;left:31%;top:23%;width:210px;height:260px;filter:drop-shadow(14px 35px 15px #29473528);transform:rotate(-25deg)}.scene-fallback i{position:absolute;inset:0;border:11px solid #af9870;border-radius:50%;box-shadow:inset 1px 1px 3px #faf6df}.scene-fallback i:nth-child(2){transform:rotate(65deg);border-color:#667a61}.scene-fallback i:nth-child(3){transform:scaleX(.5) rotate(-15deg);border-color:#d4b77b}.scene-fallback b{position:absolute;top:40%;left:35%;width:80px;height:80px;border-radius:50%;background:radial-gradient(circle at 30% 25%,#ffefac,#b3904e 75%)}.ready .scene-fallback{display:none}.promise-strip{padding:25px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);display:flex;justify-content:space-between;gap:20px;font-size:11px;font-weight:600}.promise-strip span::before{content:'+';font-size:14px;color:var(--clay);margin-right:14px}
/* Audience: real depth, readable controls */
.audience-section{padding-bottom:40px}.audience-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}.audience-card{position:relative;overflow:hidden;min-height:275px;padding:32px;border:1px solid #d5ded0;border-radius:var(--radius);text-align:left;background:#e8ede0;isolation:isolate;transition:box-shadow .25s,border-color .25s}.audience-card:hover{box-shadow:0 15px 30px #203d3512}.audience-card[aria-pressed=true]{border-color:var(--green);box-shadow:inset 0 0 0 1px var(--green)}.audience-card[aria-pressed=true] .role-cta b{background:var(--green);color:white}.teacher-choice{background:#f0e8d9}.audience-copy{position:relative;z-index:2;display:flex;align-items:flex-start;flex-direction:column;width:67%;pointer-events:none}.audience-copy .eyebrow{font-size:8px;margin-bottom:21px}.audience-copy>strong{font-size:33px;letter-spacing:-.045em;font-weight:600;line-height:1.2;margin-bottom:12px}.audience-copy>span:not(.eyebrow):not(.role-cta){font-size:12px;color:#657161;line-height:1.8}.role-cta{display:flex;align-items:center;gap:20px;margin-top:22px;font-size:10px;font-weight:700}.role-cta b{display:grid;place-items:center;font-size:17px;border:1px solid #b9c6b1;border-radius:50%;width:30px;height:30px;transition:background .2s}.student-object{position:absolute;right:23px;bottom:30px;width:160px;height:175px;perspective:700px;pointer-events:none}.mini-notebook{position:absolute;right:10px;top:4px;width:132px;height:175px;background:#33594b;color:#e2ebcb;border-radius:3px 8px 8px 3px;box-shadow:7px 4px 0 #f3f1de,10px 5px 0 #2e4634,16px 16px 20px #1c352135;transform:rotateY(-27deg) rotateX(10deg) rotateZ(10deg);padding:17px 15px;transition:transform .5s}.mini-notebook::before{content:'';position:absolute;left:4px;top:0;bottom:0;border-left:1px solid #fff3}.mini-notebook>span{font-size:19px;line-height:1.1;letter-spacing:-.03em}.mini-notebook em{color:var(--lime)}.mini-notebook small{font-size:5px;letter-spacing:.08em;position:absolute;bottom:16px}.note-wave svg{width:105px;height:65px;color:#98b88b}.note-wave .faint{opacity:.2}.object-sphere{position:absolute;left:-3px;bottom:-6px;width:57px;height:57px;background:radial-gradient(circle at 28% 28%,#f0d68c,#b68a43 80%);border-radius:50%;box-shadow:10px 14px 12px #203d3527}.audience-card:hover .mini-notebook{transform:rotateY(-15deg) rotateX(4deg) rotateZ(6deg) translateY(-6px)}.teacher-object{position:absolute;right:-6px;bottom:18px;width:200px;height:220px;pointer-events:none}.teacher-object .book-pair{position:absolute;left:-73px;top:-260px;width:350px;height:450px;transform:scale(.47);transform-origin:center bottom}
/* CSS 3D books: separate cover, page block, spine and back */
.book-pair{position:relative;perspective:1300px;transform-style:preserve-3d;width:100%;height:100%}.book{--bw:210px;--bh:296px;position:absolute;width:var(--bw);height:var(--bh);transform-style:preserve-3d;transform:rotateX(8deg) rotateY(-26deg) rotateZ(-9deg);filter:drop-shadow(24px 30px 20px #15281e28);will-change:auto}.book-front,.book-back{position:absolute;inset:0;border-radius:2px 7px 7px 2px;background:#244e40;backface-visibility:hidden}.book-front{transform:translateZ(16px);padding:21px 22px;color:#e9efdf;overflow:hidden;background:linear-gradient(110deg,#ffffff0d,transparent 30%),#234c3e;border:1px solid #3d6653}.book-front::after{content:'';position:absolute;inset:0;border-left:6px solid #08291c25;border-radius:inherit;box-shadow:inset -2px 0 5px #eff9dd1a;pointer-events:none}.book-back{transform:translateZ(-16px)}.book-pages{position:absolute;right:0;width:32px;top:4px;bottom:4px;background:repeating-linear-gradient(0deg,#e1dfd0 0px,#fffbee 1px,#e1dfd0 2px);transform-origin:right;transform:rotateY(90deg) translateX(16px);border-radius:0 3px 3px 0}.book-spine{position:absolute;width:32px;height:100%;left:0;top:0;transform-origin:left;transform:rotateY(-90deg) translateX(-16px);background:#153f30;writing-mode:vertical-rl;text-align:center;padding:16px 7px;color:#e6eacc;font-size:7px;letter-spacing:.12em}.cover-brand{display:flex;justify-content:space-between;gap:6px;font-size:5.5px;font-weight:700;letter-spacing:.12em;white-space:nowrap}.cover-brand span{font-size:10px}.cover-title{margin-top:26px;font-size:31px;letter-spacing:-.06em;line-height:1.03}.cover-title em{color:#d0e19d;font-size:29px}.cover-grade{position:absolute;right:20px;bottom:49px;font-family:var(--serif);font-size:65px;line-height:1;letter-spacing:-.06em}.cover-grade span{font-family:var(--sans);display:block;font-size:7px;letter-spacing:.16em;margin-top:7px;text-align:right}.cover-foot{position:absolute;bottom:17px;left:22px;right:18px;display:flex;justify-content:space-between;gap:10px;border-top:1px solid #b8c9a957;padding-top:9px;font-size:4.7px;font-weight:700;letter-spacing:.06em}.cover-orbit{width:110px;height:90px;position:absolute;bottom:54px;left:-16px;transform:rotate(-35deg)}.cover-orbit i{position:absolute;inset:0;border:1px solid #cedf9d6e;border-radius:50%}.cover-orbit i:nth-child(2){transform:rotate(70deg)}.cover-orbit b{position:absolute;top:37px;left:52px;width:13px;height:13px;background:#d5be7e;border-radius:50%}.book-10 .book-front,.book-10 .book-back{background:linear-gradient(110deg,#ffffff10,transparent 30%),#b96b4e;border-color:#d48e6f}.book-10 .book-spine{background:#9a543f}.book-10 .cover-title em{color:#ffe5b5}.book-10 .cover-orbit i{border-color:#ffdb9f99}.book-10 .cover-orbit b{background:#ffe0a0}.book-pair .book-10{left:45%;top:17%;transform:rotateX(8deg) rotateY(-24deg) rotateZ(10deg)}.book-pair .book-9{left:10%;top:26%;transform:rotateX(8deg) rotateY(-24deg) rotateZ(-10deg)}
/* Resource library */
.resources-section{padding-top:42px}.resources-section .section-heading h2{font-size:34px}.resource-filter{display:flex;align-items:center;gap:20px;white-space:nowrap;font-size:11px;color:var(--muted)}.resource-filter .text-link{font-size:10px}.resource-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}.resource-card{min-width:0;background:var(--white);border:1px solid var(--line);border-radius:14px;overflow:hidden;display:flex;flex-direction:column;scroll-margin-top:110px;transition:box-shadow .25s,transform .25s}.resource-card:hover{transform:translateY(-4px);box-shadow:0 12px 30px #2541330c}.resource-art{height:230px;position:relative;background:#e6eadf;display:grid;place-items:center;overflow:hidden;border-bottom:1px solid var(--line)}.resource-art>svg{width:230px;height:145px;color:#56705a;filter:drop-shadow(5px 12px 0 #b1c0a329)}.resource-art .faint{opacity:.2}.resource-art .filled{fill:currentColor}.art-index{position:absolute;bottom:13px;left:18px;font-size:7px;letter-spacing:.13em;color:#637362;font-weight:600}.physical-cover{width:auto;height:178px;max-width:145px;object-fit:contain;transform:perspective(700px) rotateY(-15deg) rotateZ(-5deg);box-shadow:8px 7px 0 #c9c8b6,14px 16px 22px #253b3a20}.art-physical{background:#e6e6db}.art-sheet{background:#eee8da}.folio{background:#fffef4;padding:18px 21px;width:151px;height:191px;transform:rotate(6deg);box-shadow:-6px 6px 0 #e1ddcb,0 12px 20px #4b3b2320;position:relative}.folio>span{font-size:5px;letter-spacing:.12em}.folio strong{display:block;line-height:1.1;font-size:24px;font-weight:500;margin-top:7px;letter-spacing:-.06em}.folio em{color:var(--clay)}.folio-lines{height:22px;margin-top:10px;background:repeating-linear-gradient(0deg,transparent 0,transparent 6px,#d0d6c7 6px,#d0d6c7 7px)}.folio small{font-size:4px;position:absolute;bottom:13px;letter-spacing:.08em}.art-test{background:#e9ecdf}.art-wave{background:#dce8e1}.art-video{background:#eee1d7;color:#986647}.art-video>svg{color:#ab7256}.art-game{background:#e9e2cc}.art-orbit{background:#e6e6d7}.art-kit{background:#e4e9df}.art-kit .book-pair{position:absolute;width:370px;height:460px;transform:scale(.53);transform-origin:center bottom;bottom:12px;left:calc(50% - 185px)}.art-experiment{background:#e8e3d7}.resource-content{padding:23px;display:flex;flex-direction:column;flex:1}.resource-content>.eyebrow{font-size:8px;margin-bottom:10px}.resource-content h3{font-size:20px;line-height:1.3;letter-spacing:-.035em;margin-bottom:12px}.resource-content>p{font-size:12px;line-height:1.8;margin-bottom:16px;min-height:44px}.resource-detail{font-size:11px;margin-bottom:23px}.resource-detail summary{cursor:pointer;color:#576951;list-style:none;display:flex;align-items:center;justify-content:space-between;gap:10px}.resource-detail summary::after{content:'+';font-size:18px}.resource-detail[open] summary::after{content:'−'}.resource-detail p{margin:10px 0 0;padding-top:10px;border-top:1px solid var(--line)}.resource-price{display:flex;align-items:baseline;gap:12px;margin-top:auto;padding-top:17px;border-top:1px solid var(--line);margin-bottom:17px}.resource-price strong{font-size:19px;font-weight:600;letter-spacing:-.04em}.resource-price span{font-size:9px;color:var(--muted)}.resource-actions{display:flex;align-items:center;flex-wrap:wrap;gap:15px}.resource-actions .text-link{font-size:9px;gap:8px}.kit-spotlight{display:grid;grid-template-columns:1.12fr 1fr;gap:30px;align-items:center;border-radius:var(--radius);background:var(--ink);color:#f0f2e4;padding:56px 60px;min-height:390px;overflow:hidden}.kit-spotlight .eyebrow{color:#bdd0b5}.kit-spotlight h2{font-size:42px}.kit-spotlight h2 em{color:var(--lime)}.kit-spotlight p:not(.eyebrow){color:#b9c7b8;font-size:13px;max-width:390px;margin:24px 0 28px}.spotlight-books{height:310px;position:relative}.spotlight-books .book-pair{position:absolute;width:370px;height:400px;bottom:30px;left:50%;transform:translateX(-50%) scale(.85)}.spotlight-caption{position:absolute;bottom:-18px;left:0;right:0;text-align:center;color:#b4c9a4;font-size:7px;letter-spacing:.15em}.app-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}.app-card{position:relative;overflow:hidden;border:1px solid var(--line);border-radius:var(--radius);padding:32px;min-height:430px;isolation:isolate}.fizo-card{background:#eeeddb}.hocam-card{background:#e8ede5}.app-text{position:relative;z-index:2;max-width:72%}.app-text .eyebrow{font-size:8px}.app-text h3{font-size:34px;margin-bottom:20px}.app-text h3 em{color:var(--clay)}.app-text p{font-size:12px;max-width:290px;margin-bottom:24px}.app-text small{display:block;font-size:9px;line-height:1.8;color:var(--muted);margin-top:20px;max-width:265px}.app-text>.text-link{display:table;font-size:10px;margin-top:15px}.app-card>img{position:absolute;right:-46px;bottom:8px;width:240px;height:auto;max-height:330px;object-fit:contain;z-index:1;pointer-events:none}.hocam-card>img{width:250px;right:-40px;bottom:20px}.about-strip{display:grid;grid-template-columns:210px 1fr;align-items:center;gap:65px;max-width:900px;border-top:1px solid var(--line);padding-block:80px}.about-strip>img{width:210px;height:260px;object-fit:cover;object-position:50% 25%;border-radius:110px 110px 12px 12px;filter:saturate(.7)}.about-strip h2{font-size:37px}.about-strip p:not(.eyebrow){font-size:13px;max-width:550px;margin:20px 0}.newsletter-section{background:#e9ede2;padding:55px 0}.newsletter-grid{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}.newsletter-grid h2{font-size:36px}.newsletter-grid p:not(.eyebrow){font-size:12px;margin:18px 0 0}.newsletter-form{align-self:center;border:1px solid #bfcdba;border-radius:10px;overflow:hidden;background:#f5f6ee}.newsletter-form summary{display:flex;justify-content:space-between;padding:23px;font-size:13px;font-weight:700;cursor:pointer;list-style:none}.newsletter-form summary span{font-size:18px}.newsletter-form iframe{display:block;width:100%;max-width:100%;border:0;background:white}.newsletter-form:not([open]) iframe{display:none}
/* Kit landing page */
.kit-hero{display:grid;grid-template-columns:1.03fr 1fr;gap:50px;align-items:center;padding-block:46px 66px}.breadcrumb{font-size:10px;color:var(--muted);display:block;margin-bottom:40px}.breadcrumb span{margin-inline:12px;color:#a1aa99}.kit-hero h1{font-size:clamp(46px,5.15vw,72px)}.kit-hero .hero-description{font-size:14px;max-width:430px}.hero-facts{display:flex;gap:32px;margin-top:38px}.hero-facts>div{display:flex;align-items:center;gap:10px}.hero-facts strong{font-family:var(--serif);font-weight:500;font-size:30px}.hero-facts span{font-size:9px;line-height:1.6;max-width:55px;color:var(--muted)}.kit-display{position:relative;height:520px;background:#e6eadf;border:1px solid #d9dfd3;border-radius:var(--radius);overflow:hidden}.kit-display-top,.kit-display-bottom{position:absolute;left:25px;right:25px;display:flex;justify-content:space-between;gap:10px;font-size:7px;font-weight:600;letter-spacing:.1em;z-index:5}.kit-display-top{top:26px}.kit-display-bottom{bottom:23px;letter-spacing:.05em;color:#697562}.kit-display>.book-pair{width:430px;height:500px;position:absolute;left:50%;top:10px;translate:-50% 0;transition:rotate .2s}.display-orbit{width:340px;height:340px;border-radius:50%;border:1px solid #bccbab;position:absolute;top:70px;left:90px}.display-orbit::before,.display-orbit::after{content:'';position:absolute;inset:-25px;border-radius:50%;border:1px solid #cbd4bf}.display-orbit::after{inset:-50px;border-color:#d8dfce}.material-ticket{position:absolute;right:20px;bottom:65px;z-index:6;padding:15px 19px;background:#f8f7ea;transform:rotate(7deg);box-shadow:2px 12px 24px #263e261c;width:120px;border:1px solid #ececde}.material-ticket>span{font-size:7px;letter-spacing:.12em;font-weight:700}.material-ticket strong{display:block;font-family:var(--serif);font-size:25px;line-height:1.05;font-weight:500;margin:8px 0 18px}.material-ticket small{font-size:7px;font-weight:700;letter-spacing:.12em}.kit-subnav{border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.kit-subnav>div{display:flex;justify-content:space-between;gap:24px;overflow-x:auto;scrollbar-width:thin}.kit-subnav a{padding:20px 0;font-size:11px;font-weight:600;white-space:nowrap;min-height:50px}.kit-subnav a:hover{color:var(--clay)}.component-grid{display:grid;grid-template-columns:repeat(3,1fr);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}.component-card{padding:30px;position:relative;min-height:187px;border-right:1px solid var(--line);border-bottom:1px solid 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.role-cta{font-size:10px;gap:16px}.student-object{right:5px;bottom:35px;scale:.83;opacity:1}.teacher-object{right:-11px;scale:.84;bottom:17px}.resources-section{padding-top:27px}.resources-section .section-heading{display:block}.resources-section .section-heading h2{font-size:29px}.resource-filter{flex-direction:row;justify-content:space-between;align-items:center;margin-top:20px;font-size:10px}.resource-grid{grid-template-columns:1fr;gap:20px}.resource-art{height:230px}.resource-content{padding:25px}.resource-content>.eyebrow{font-size:8px}.resource-content h3{font-size:23px}.resource-content>p{font-size:12px;min-height:0;max-width:350px}.resource-detail{font-size:11px;margin-bottom:19px}.resource-price strong{font-size:21px}.resource-price span{font-size:10px}.resource-actions .button{font-size:11px;min-height:44px;padding:11px 16px}.resource-actions .text-link{font-size:10px}.kit-spotlight{grid-template-columns:1fr;padding:34px 28px 20px;gap:15px;min-height:0}.kit-spotlight h2{font-size:33px}.kit-spotlight p:not(.eyebrow){font-size:12px;margin:22px 0 25px}.kit-spotlight .button-row{gap:16px}.kit-spotlight .text-link{font-size:11px}.spotlight-books{height:265px}.spotlight-books .book-pair{bottom:-10px;scale:1;transform:translateX(-50%) scale(.72)}.spotlight-caption{bottom:5px;font-size:6px}.app-grid{grid-template-columns:1fr;gap:20px}.app-card{padding:30px;min-height:400px}.app-text{max-width:90%}.app-text .eyebrow{font-size:8px}.app-text h3{font-size:35px}.app-text p{max-width:83%;font-size:12px}.app-text small{max-width:70%;font-size:9px}.app-card>img{width:178px;right:-23px;bottom:0}.hocam-card>img{width:200px;right:-34px}.about-strip{grid-template-columns:1fr;gap:28px;padding-block:52px}.about-strip>img{width:115px;height:145px;border-radius:65px 65px 9px 9px}.about-strip h2{font-size:32px}.about-strip p:not(.eyebrow){font-size:12px}.newsletter-grid{grid-template-columns:1fr;gap:28px}.newsletter-section{padding:40px 0}.newsletter-grid h2{font-size:33px}.newsletter-form summary{font-size:12px;padding:18px}.kit-hero{grid-template-columns:1fr;padding-block:25px 35px;gap:32px}.breadcrumb{margin-bottom:26px;font-size:9px}.kit-hero h1{font-size:clamp(44px,10.6vw,63px);margin-bottom:21px}.kit-hero .hero-description{font-size:13px;margin-bottom:24px}.hero-facts{gap:30px;margin-top:28px;flex-wrap:nowrap}.hero-facts strong{font-size:28px}.hero-facts span{font-size:8px}.kit-display{height:440px;max-width:470px;width:100%;margin-inline:auto}.kit-display>.book-pair{scale:.86;top:-10px}.kit-display-top{font-size:7px;top:22px;left:22px;right:22px}.kit-display-bottom{font-size:6px;bottom:19px;left:22px;right:22px}.material-ticket{scale:.82;right:2px;bottom:45px}.kit-subnav>div{width:auto;margin-left:20px;padding-right:20px;gap:27px;justify-content:flex-start}.kit-subnav a{font-size:10px;padding-block:17px}.component-grid{grid-template-columns:1fr 1fr;border-radius:12px}.component-card{padding:22px 17px;min-height:180px}.component-card:nth-child(3n){border-right:1px solid var(--line)}.component-card:nth-child(even){border-right:0}.component-card:nth-child(n+4){border-bottom:1px solid var(--line)}.component-card:nth-child(n+5){border-bottom:0}.component-card>span{font-size:16px;margin-bottom:16px}.component-card h3{font-size:17px;line-height:1.2;letter-spacing:-.035em}.component-card p{font-size:10px;line-height:1.8}.included-strip{display:block;margin-top:22px}.included-strip>span{font-size:7px;display:block;margin-bottom:9px}.included-strip p{font-size:10px;line-height:2}.included-strip b{padding-inline:6px}.preview-section{padding:52px 0}.preview-section .section-heading h2{font-size:34px}.preview-section .section-heading h2+p{font-size:12px;line-height:1.8;margin-top:17px}.segmented{display:inline-flex;margin-top:22px}.segmented button{font-size:11px;padding:8px 22px;min-height:39px}.preview-grid{grid-template-columns:1fr;gap:31px}.preview-image{height:365px;padding:24px 27px 0}.preview-info{padding-top:20px}.preview-info .eyebrow{font-size:8px}.preview-info>strong{font-size:18px}.preview-info>span:last-child{font-size:11px}.preview-footnote{font-size:10px;line-height:1.8;margin-top:30px}.sample-box{grid-template-columns:1fr;padding:30px 23px;gap:24px}.sample-box h2{font-size:35px}.sample-box h2+p{font-size:12px;margin-top:19px}.sample-box .small{font-size:10px}.sample-form-wrap{padding:23px 20px}.sample-form-wrap h3{font-size:21px}.sample-form-wrap label{font-size:11px}.sample-form-wrap input:not([type=hidden]){font-size:16px}.sample-meta{gap:9px}.sample-meta span{font-size:8px}.pricing-section{padding-top:0}.pricing-section .section-heading>p{font-size:11px}.pricing-grid{grid-template-columns:1fr;gap:18px}.price-card{padding:28px}.price-card h3{font-size:24px}.price-card>.eyebrow{font-size:8px}.price-value{margin-top:20px}.price-value strong{font-size:41px}.price-note{font-size:10px}.price-card li{font-size:12px;margin-bottom:13px;gap:10px}.price-card .button{font-size:12px;padding:13px;min-height:48px}.exam-offer{display:block;padding:25px}.exam-offer h3{font-size:20px}.exam-offer h3 span{display:block;margin:10px 0 0;font-size:22px}.exam-offer p{font-size:11px}.exam-offer small{font-size:10px;display:block;line-height:1.8}.exam-offer .button{margin-top:22px;width:100%;font-size:11px}.experiment-section{padding:50px 0}.experiment-grid{grid-template-columns:1fr;gap:43px}.experiment-visual{height:400px;max-width:390px;width:100%;margin-inline:auto}.experiment-cover{width:59%;left:5%;top:17px}.experiment-page{width:55%;right:2%;bottom:8px}.experiment-grid h2{font-size:38px}.experiment-grid p:not(.eyebrow){font-size:12px}.experiment-grid p.experiment-intro{font-size:20px;margin-top:22px}.experiment-facts{gap:27px;font-size:10px;padding-block:18px}.experiment-facts strong{font-size:26px}.faq-section{grid-template-columns:1fr;gap:30px}.faq-section h2{font-size:35px}.faq-section>div>p:not(.eyebrow){font-size:12px;margin:20px 0}.faq-item summary{font-size:12px;padding-block:22px}.faq-item p{font-size:12px}.closing-cta{padding:36px 12px 50px;margin-bottom:0}.closing-cta h2{font-size:33px}.preview-dialog{width:96vw;max-width:96vw;height:94dvh;max-height:94dvh;border-radius:10px}.dialog-bar{padding:11px 12px;gap:10px}.dialog-bar h2{font-size:10px}.dialog-close{gap:12px;font-size:10px;flex-shrink:0;padding:6px 9px}.dialog-image-wrap{padding:8px}.dialog-tip{font-size:8px}.footer-top{grid-template-columns:1fr 1fr;gap:30px 18px;padding-bottom:36px}.footer-top>div:first-child{grid-column:1/-1;margin-bottom:4px}.footer-brand{font-size:27px}.footer-top h3{font-size:10px}.footer-top>div>a:not(.footer-brand){font-size:10px;line-height:1.8;margin-bottom:9px}.site-footer{padding-top:42px}.footer-top p{font-size:10px;margin-bottom:0}.footer-bottom{font-size:8px;gap:13px;padding-block:20px}.footer-bottom>span:nth-child(2){display:none}}
@media(max-width:370px){.container{width:calc(100% - 32px)}.header-inner{width:calc(100% - 32px)}.home-hero h1{font-size:43px}.hero-copy .button{font-size:10px;gap:10px;padding-inline:12px}.audience-copy>strong{font-size:27px}.audience-card{padding:22px}.audience-copy .eyebrow{font-size:6px}.student-object{scale:.72;right:0}.teacher-object{scale:.73;right:-19px}.role-cta{gap:9px!important;font-size:9px!important}.physics-stage{height:360px}.hero-facts{gap:23px}.kit-display{height:410px}.kit-display>.book-pair{scale:.77}.sample-box{padding:25px 18px}.sample-form-wrap{padding:20px 16px}.preview-image{height:320px;padding:22px 22px 0}.experiment-visual{height:350px}.app-text{max-width:100%}.app-text p{max-width:80%}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation:none!important;transition:none!important}.resource-card:hover,.button:hover{transform:none}.book-pair{rotate:none!important}.audience-card:hover .mini-notebook{transform:rotateY(-27deg) rotateX(10deg) rotateZ(10deg)}}
/* App portraits live in their own row, with no text over the artwork. */
.app-card{min-height:0}.app-text{max-width:none}.app-identity{display:flex;align-items:center;gap:20px;margin-bottom:25px}.app-identity h3{flex:1;min-width:0;margin:0;font-size:34px}.app-identity>img{width:100px;height:112px;flex-shrink:0;object-fit:cover;object-position:50% 16%;border-radius:60px 60px 10px 10px}.hocam-card .app-identity>img{object-position:center}.app-text p,.app-text small{max-width:none}.app-text small{max-width:350px}.app-text>.text-link{margin-top:14px}
@media(max-width:1100px){.app-identity{gap:14px}.app-identity h3{font-size:29px}.app-identity>img{width:80px;height:98px}}
@media(max-width:620px){.app-identity h3{font-size:31px}.app-identity>img{width:84px;height:103px}.app-text p{max-width:none;font-size:12px}.app-text small{max-width:none;font-size:9px}.app-text .eyebrow{font-size:7px}.app-identity{margin-bottom:25px}}
@media(max-width:370px){.app-identity h3{font-size:27px}.app-identity>img{width:72px;height:92px}}