@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Poppins:wght@400;500;600;700;800&display=swap');
:root{--purple:#7443aa;--deep:#392054;--lavender:#f5effc;--text:#352c3e;--muted:#756c7d;--green:#3fa667;--border:#e9e0f0}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:24px}body{margin:0;color:var(--text);background:white;font-family:'DM Sans',Arial,sans-serif;line-height:1.65}button,a{-webkit-tap-highlight-color:transparent}a{color:inherit;text-decoration:none}button{font:inherit}button:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid #bc8ce8;outline-offset:5px}h1,h2,h3,h4{font-family:Poppins,Arial,sans-serif;line-height:1.3;margin:0}p{margin:0 0 20px}.container{width:min(1120px,calc(100% - 48px));margin:auto}.narrow{max-width:850px}.header{background:white;border-bottom:1px solid #f3edf7}.header-inner{min-height:105px;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{display:flex;align-items:center;gap:10px;font-family:Poppins,Arial,sans-serif;font-size:23px;font-weight:800;color:var(--purple);line-height:1.15;white-space:nowrap}.brand small{display:block;font-size:11px;letter-spacing:6px;margin-top:7px}.brand-icon{background:var(--purple);color:white;border-radius:12px;display:grid;place-items:center;width:49px;height:54px;position:relative;font-size:25px;transform:rotate(-6deg)}.brand-icon span{position:absolute;bottom:-8px;right:-5px;color:#f0b84c;font-size:24px}.member-link{border:1px solid var(--purple);border-radius:6px;padding:9px 20px;color:var(--purple);font-weight:600;font-size:14px}.member-link span{margin-left:15px}.hero{background:linear-gradient(110deg,#f7f1fc,#faf7fd 65%,#eee4f8);padding:72px 0 86px;overflow:hidden}.hero-grid{display:grid;grid-template-columns:1.02fr 1fr;gap:50px;align-items:center}.pill{display:inline-block;border:1px solid #dfceee;background:#ece0f6;border-radius:100px;font-weight:600;color:var(--purple);font-size:12px;letter-spacing:.25px;padding:7px 15px}h1{font-size:clamp(36px,3.8vw,49px);font-weight:700;letter-spacing:-1.5px;margin:22px 0}h1 em{color:var(--purple);font-style:normal}.hero-copy>p{font-size:18px;color:var(--muted);max-width:490px;margin-bottom:29px}.button{display:inline-flex;align-items:center;justify-content:center;gap:22px;padding:17px 26px;background:var(--green);box-shadow:0 6px 18px #3fa6671c;border-radius:7px;color:white;font-weight:700;font-size:15px;line-height:1.4;transition:transform .18s,background .18s;text-align:center}.button:hover{background:#318652;transform:translateY(-2px)}.hero-note{display:flex;gap:21px;font-size:12px;color:var(--muted);margin-top:16px}.hero-note span::first-letter{color:var(--purple)}.hero-art{position:relative;min-height:460px;display:flex;align-items:center;justify-content:center}.hero-art:before{content:'';width:395px;height:395px;border-radius:50%;background:#e7d8f3;position:absolute}.book-stack{position:relative;width:360px;height:400px}.book{position:absolute;width:255px;height:365px;left:10px;top:15px;border-radius:4px 10px 10px 4px;background:linear-gradient(135deg,#a580c5,#7040a2 60%,#57337c);color:white;box-shadow:15px 22px 32px #3c215535,inset 8px 0 0 #ffffff16;transform:rotate(-9deg);padding:26px 25px;overflow:hidden}.back-page{position:absolute;left:19px;top:20px;width:255px;height:365px;border-radius:6px;background:repeating-linear-gradient(90deg,#eee 0,#eee 1px,white 1px,white 3px);transform:rotate(-9deg) translateX(6px)}.book-brand{font-weight:700;font-size:14px}.book-brand b{display:block;font-size:8px;letter-spacing:4px}.book-label{font-size:8px;letter-spacing:2px;margin-top:26px;opacity:.75}.book-title{font-family:Poppins,sans-serif;font-weight:800;font-size:51px;letter-spacing:2px}.atom{height:110px;width:150px;position:relative;margin:9px auto}.atom i{position:absolute;left:0;top:32px;border:1.5px solid #e9dcffbc;border-radius:50%;height:48px;width:145px}.atom i:nth-child(2){transform:rotate(60deg)}.atom i:nth-child(3){transform:rotate(-60deg)}.atom b{width:13px;height:13px;background:#e9c58b;border-radius:50%;position:absolute;left:66px;top:49px}.equation{position:absolute;font-size:12px;right:14px;bottom:65px;transform:rotate(5deg);opacity:.7}.book-bottom{font-size:8px;letter-spacing:1px;margin-top:5px}.book-bottom span{font-size:9px;letter-spacing:0;opacity:.7}.sample-sheet{position:absolute;width:188px;height:270px;right:-23px;bottom:-6px;background:#fff;border-radius:3px;padding:20px 17px;box-shadow:5px 15px 24px #39205426;transform:rotate(11deg);font-size:8px;color:#776884}.sample-sheet>span{font-size:6px;letter-spacing:1px;color:var(--purple)}.sample-sheet h3{font-size:17px;color:var(--purple);margin-top:13px}.sheet-rule{height:4px;background:#b895d2;margin:12px 0}.sample-sheet p{font-size:7px;margin:8px 0}.formula{background:#f0e6f7;color:var(--purple);border-radius:5px;text-align:center;padding:10px 4px;font-weight:700;font-size:24px;margin:14px 0}.sample-sheet .formula{font-size:18px;margin:15px 0}.sheet-lines{height:3px;background:#e7e3eb;margin-top:8px;width:100%}.short{width:70%}.art-spark{position:absolute;color:var(--purple);font-size:42px}.spark-one{top:0;right:25px}.spark-two{bottom:30px;left:5px;font-size:30px}.floating-tag{position:absolute;bottom:-3px;right:12px;background:white;border:1px solid #e9def2;border-radius:9px;padding:12px 17px;font-size:12px;font-weight:700;box-shadow:0 6px 20px #36214e0c}.section{padding:76px 0}.section-heading{text-align:center;margin-bottom:39px}.eyebrow{color:var(--purple);font-size:11px;letter-spacing:1.7px;font-weight:700}.section-heading h2{font-size:31px;font-weight:700;margin:10px 0 12px;letter-spacing:-.8px}.section-heading p{font-size:15px;color:var(--muted)}.sample-gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;max-width:940px;margin:auto}.sample-card{position:relative;appearance:none;display:block;width:100%;text-align:left;background:white;border:1px solid #ddd2e6;box-shadow:0 8px 28px #41245c0c;padding:25px 23px 45px;cursor:zoom-in;min-height:390px;border-radius:4px;transition:transform .2s}.sample-card:hover{transform:translateY(-5px)}.paper-top{font-size:7px;letter-spacing:.5px;display:flex;justify-content:space-between;color:var(--purple);border-bottom:2px solid #ac87ca;padding-bottom:12px}.sample-card h3{font-size:24px;color:var(--purple);margin:17px 0 2px}.sample-card p{font-size:10px;color:var(--muted);margin:0}.sample-card h4{font-size:12px;color:var(--purple);margin-top:17px}.sample-card .formula{font-size:21px}.sample-card .small{font-size:15px}.diagram-motion{display:flex;align-items:center;justify-content:space-around;font-size:28px;height:70px}.paper-lines{height:24px;background:repeating-linear-gradient(0deg,transparent 0,transparent 6px,#e4dfe9 6px,#e4dfe9 8px);margin-top:8px}.sample-zoom{position:absolute;bottom:13px;right:18px;color:var(--purple);font-size:10px;font-weight:700}.sample-caption{font-size:11px;text-align:center;color:var(--muted);margin:22px auto 0}.force-diagram{height:70px;display:flex;align-items:center;justify-content:center;gap:12px;color:var(--purple);font-size:14px}.force-diagram b{background:#dbcae9;padding:12px}.circuit{border:2px solid #8b64ac;border-radius:4px;display:flex;justify-content:space-around;align-items:center;height:50px;margin:15px 25px 5px;color:var(--purple)}.circuit b{font-size:30px}.audience{background:var(--lavender)}.audience-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:35px;text-align:center}.emoji{font-size:35px;margin-bottom:16px}.audience h3{font-size:17px;margin-bottom:12px}.audience p{font-size:14px;color:var(--muted);margin:0}.curriculum-banner{background:#f4edf9;border-radius:12px;padding:36px 55px;display:flex;align-items:center;justify-content:space-between;margin-bottom:45px}.curriculum-banner>div>span{font-size:9px;letter-spacing:1.5px;color:var(--purple);font-weight:700}.curriculum-banner h3{font-size:35px;color:var(--deep);margin:12px 0}.curriculum-banner p{font-size:14px;max-width:340px;color:var(--muted);margin:0}.banner-symbol{font-family:Georgia,serif;font-style:italic;color:var(--purple);font-size:60px;transform:rotate(-8deg);padding-right:20px}.banner-symbol span{display:block;font-size:30px;margin:15px 0 0 50px}.topic-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:0 35px}.topic{padding:26px 0;border-bottom:1px solid var(--border)}.topic h3{font-size:16px;color:var(--deep);margin-bottom:14px}.topic ul,.check-list{list-style:none;padding:0;margin:0}.topic li{font-size:13px;color:var(--muted);padding:4px 0 4px 20px;position:relative}.topic li:before,.check-list li:before{content:'✓';position:absolute;left:0;color:var(--purple);font-weight:700}.bonus{display:flex;gap:24px;align-items:center;background:var(--lavender);padding:30px 36px;border:1px dashed #b994d6;border-radius:10px;margin:36px 0}.bonus .emoji{font-size:47px;margin:0}.bonus h3{font-size:23px;margin:5px 0 10px}.bonus p{font-size:14px;margin:0 0 5px;color:var(--muted)}.bonus small{font-size:11px;color:var(--muted)}.center{text-align:center}.benefits{background:#fbf9fd}.stars{color:#eab347;font-size:22px;letter-spacing:5px}.benefit-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:28px;text-align:center}.benefit-grid>div>span{display:block;font-size:28px;color:var(--purple);margin-bottom:15px}.benefit-grid h3{font-size:15px;margin-bottom:8px}.benefit-grid p{font-size:13px;color:var(--muted);margin:0}.offer-section{background:var(--lavender)}.offer-card{display:grid;grid-template-columns:1fr 1fr;max-width:940px;margin:auto;background:#fff;border:1px solid #e0d0ed;border-radius:14px;overflow:hidden;box-shadow:0 15px 45px #4f26620a}.offer-product{padding:35px 40px;background:#fcfaff}.offer-product>.pill{font-size:11px}.mini-book{width:168px;height:218px;background:linear-gradient(135deg,#b08acc,#6e409c);border-radius:4px 8px 8px 4px;box-shadow:9px 9px 0 #e5dbea,14px 17px 22px #39205420;margin:28px auto 30px;color:white;padding:20px;transform:rotate(-6deg)}.mini-book>span{font-size:9px;display:block}.mini-book strong{font-family:Poppins,sans-serif;font-size:30px;display:block;margin-top:12px}.mini-atom{font-size:54px;line-height:1.4;text-align:center}.mini-book small{font-size:6px;letter-spacing:1px}.offer-product h3{font-size:24px;margin-bottom:17px}.check-list li{font-size:13px;padding:5px 0 5px 21px;position:relative;color:var(--muted)}.offer-price{padding:49px 28px;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center}.offer-label{font-size:11px;letter-spacing:1.2px;color:var(--purple);font-weight:700;background:var(--lavender);padding:8px 16px;border-radius:50px}.old-price{text-decoration:line-through;color:#9c91a3;margin:23px 0 4px;font-size:18px}.installments{font-size:16px;margin:0}.price{color:var(--purple);font-size:27px;line-height:1.3;margin:5px 0;font-weight:700}.price strong{font-family:Poppins,sans-serif;font-size:70px;letter-spacing:-3px}.cash{font-size:17px;margin-bottom:25px}.offer-price .button{font-size:13px;width:100%;padding:18px 12px;gap:10px}.purchase-note{font-size:10px;color:var(--muted);margin:14px 0}.payments{display:flex;gap:18px;align-items:center;font-size:12px;color:#81708d}.payments>span:first-of-type{font-weight:700;color:#42a38a}.faq-list{border-top:1px solid var(--border)}details{border-bottom:1px solid var(--border)}summary{list-style:none;cursor:pointer;padding:21px 35px 21px 0;font-weight:600;font-size:15px;position:relative}summary::-webkit-details-marker{display:none}summary:after{content:'+';position:absolute;right:6px;top:15px;color:var(--purple);font-size:24px;font-weight:400}details[open] summary:after{content:'−'}details p{font-size:14px;color:var(--muted);padding:0 24px 0 0;line-height:1.8}.support{text-align:center;background:var(--lavender);padding:53px 0}.support h2{font-size:27px;margin-bottom:12px}.support p{font-size:14px;color:var(--muted)}.support-button{font-size:14px;padding:13px 24px}footer{padding:35px 0}.footer-inner{display:flex;align-items:center;gap:25px;justify-content:space-between}.footer-inner .brand{font-size:17px}.footer-inner .brand-icon{width:38px;height:42px;font-size:20px}.footer-inner .brand small{font-size:8px;letter-spacing:4px}.footer-inner p{font-size:10px;color:var(--muted);margin:0}.privacy-link{border:0;background:none;padding:5px;color:var(--muted);text-decoration:underline;cursor:pointer;font-size:11px}dialog{position:fixed;border:0;border-radius:10px;padding:36px;max-width:min(600px,calc(100vw - 32px));max-height:90vh;overflow:auto;color:var(--text);box-shadow:0 20px 80px #0004}dialog::backdrop{background:#241632ad}dialog h2{font-size:23px;margin:14px 0 20px}dialog p{font-size:14px}.dialog-close{position:absolute;right:10px;top:5px;border:0;background:none;font-size:28px;color:var(--purple);cursor:pointer}#preview-content .sample-card{width:min(360px,calc(100vw - 110px));pointer-events:none;box-shadow:none}.preview-note{margin:18px 0 0;font-size:11px;color:var(--muted)}
@media(max-width:800px){.hero-grid{gap:20px}.hero{padding:48px 0}.hero-art{transform:scale(.86);margin-left:-20px;margin-right:-20px}.hero-copy>p{font-size:16px}.hero-note{gap:10px;font-size:10px}h1{font-size:36px}.topic-grid{grid-template-columns:repeat(2,1fr)}.sample-gallery{gap:15px}.sample-card{padding:18px 14px 35px}.sample-card h3{font-size:19px}.paper-top{font-size:5px}.audience-grid{gap:22px}.audience h3{font-size:15px}.audience p{font-size:13px}.section{padding:56px 0}.offer-product{padding:30px 24px}.footer-inner{flex-wrap:wrap}.footer-inner p{order:3;width:100%;text-align:center}.benefit-grid{gap:20px}}
@media(max-width:600px){.container{width:calc(100% - 36px)}.header-inner{min-height:86px}.brand{font-size:18px;gap:8px}.brand-icon{width:39px;height:44px;font-size:22px}.brand small{font-size:8px;letter-spacing:5px}.member-link{font-size:11px;padding:8px 10px}.member-link span{margin-left:5px}.hero{padding:35px 0 30px}.hero-grid{grid-template-columns:1fr;gap:0}.hero-copy{text-align:center}.hero-copy>p{margin-left:auto;margin-right:auto;font-size:16px}.hero-note{justify-content:center;font-size:11px}h1{font-size:37px;line-height:1.23;margin:20px 0;letter-spacing:-1px}.hero-copy>.button{width:100%}.hero-art{min-height:405px;transform:scale(.86);margin:-5px -10px -15px}.hero-art:before{width:360px;height:360px}.floating-tag{right:0;bottom:-1px}.spark-one{right:0}.section{padding:45px 0}.section-heading{margin-bottom:27px}.section-heading h2{font-size:26px;line-height:1.35}.section-heading p{font-size:13px}.sample-gallery{grid-template-columns:1fr;max-width:320px;gap:23px}.sample-card{padding:24px 25px 40px;min-height:390px}.paper-top{font-size:7px}.sample-card h3{font-size:25px}.audience-grid{grid-template-columns:1fr;gap:28px;max-width:330px;margin:auto}.audience h3{font-size:17px}.audience p{font-size:14px}.emoji{margin-bottom:10px}.curriculum-banner{padding:25px;overflow:hidden;position:relative}.curriculum-banner>div:first-child{position:relative;z-index:1}.curriculum-banner h3{font-size:29px}.curriculum-banner p{max-width:230px;font-size:13px}.banner-symbol{position:absolute;right:-30px;opacity:.12;font-size:68px}.topic-grid{grid-template-columns:1fr;gap:0}.topic{padding:21px 3px}.topic h3{font-size:17px}.topic li{font-size:14px}.bonus{padding:24px 20px;gap:15px;align-items:flex-start}.bonus .emoji{font-size:30px}.bonus h3{font-size:20px}.bonus p{font-size:13px}.center .button{width:100%;font-size:14px}.benefit-grid{grid-template-columns:1fr 1fr;gap:30px 18px}.benefit-grid h3{font-size:14px}.benefit-grid p{font-size:12px}.offer-card{grid-template-columns:1fr}.offer-product{padding:28px}.offer-price{padding:30px 23px 35px}.offer-product h3{text-align:center}.check-list{max-width:310px;margin:auto}.mini-book{margin-bottom:35px}.offer-price .button{font-size:14px}.price strong{font-size:74px}summary{font-size:14px;padding-top:19px;padding-bottom:19px}.support h2{font-size:25px}.support p{font-size:13px}.footer-inner{gap:20px}.footer-inner p{font-size:9px}dialog{padding:30px 22px}}
.hero-sample{position:absolute;width:188px;right:-23px;bottom:-6px;padding:0;border:0;background:#fff;border-radius:3px;box-shadow:5px 15px 24px #39205426;transform:rotate(11deg);cursor:zoom-in;overflow:hidden}.hero-sample img{display:block;width:100%;height:auto}.real-sample{min-width:0}.real-sample-preview{position:relative;display:block;width:100%;padding:0;background:white;border:1px solid #ddd2e6;border-radius:10px;box-shadow:0 10px 30px #41245c12;cursor:zoom-in;overflow:hidden;transition:transform .2s,box-shadow .2s}.real-sample-preview:hover{transform:translateY(-5px);box-shadow:0 16px 38px #41245c20}.real-sample-preview img{display:block;width:100%;height:auto}.real-sample-zoom{display:flex;align-items:center;justify-content:space-between;padding:12px 17px;border-top:1px solid var(--border);background:#faf6fe;color:var(--purple);font-size:11px;font-weight:700}.real-sample-caption{padding:19px 4px 0}.real-sample-caption h3{font-size:19px;color:var(--deep)}.real-sample-caption p{font-size:12px;color:var(--muted);margin:7px 0 0;line-height:1.6}.sample-cta{margin-top:27px}#preview-dialog{width:min(820px,calc(100vw - 32px));max-width:none;padding:30px 25px 23px}#preview-dialog .dialog-close{position:sticky;display:block;margin-left:auto;right:0;top:0;width:38px;height:38px;border-radius:50%;line-height:1;background:#f0e6f7;z-index:1}#preview-dialog h2{margin:0 0 20px;padding-right:35px;font-size:23px}.full-sample{display:block;width:100%;height:auto;border:1px solid var(--border);border-radius:5px}.sample-original{display:block;margin-top:18px;color:var(--purple);font-size:13px;font-weight:600;text-align:center;text-decoration:underline}@media(max-width:600px){.sample-gallery{max-width:360px}.real-sample-caption{padding-top:15px}.real-sample-caption h3{font-size:20px}.real-sample-caption p{font-size:13px}#preview-dialog{padding:15px 12px}#preview-dialog h2{font-size:20px}.sample-cta .button{width:100%;font-size:13px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}

.stripe-offer-value{font-family:Poppins,Arial,sans-serif;font-size:34px;line-height:1.3;font-weight:700;color:var(--purple);margin:12px 0 20px;letter-spacing:-1px}

.header-actions{display:flex;align-items:center;gap:20px}.subject-link{color:var(--muted);font-size:13px;font-weight:600;padding:9px 0;border-bottom:2px solid transparent}.subject-link:hover,.subject-link.is-current{color:var(--purple);border-color:var(--purple)}.portuguese-landing .book-title{font-size:29px;letter-spacing:.4px;margin-top:8px}.letters-art{height:110px;width:150px;margin:9px auto;display:flex;align-items:center;justify-content:center;font-family:Georgia,serif;font-size:86px;line-height:1;color:#f9efff}.portuguese-landing .book-bottom{margin-top:10px}.portuguese-landing .equation{font-size:9px}.portuguese-landing .mini-book strong{font-size:19px;letter-spacing:0;margin-top:16px}.mini-letters{height:85px;display:flex;align-items:center;justify-content:center;font-family:Georgia,serif;font-size:59px}.portuguese-landing .mini-book small{font-size:6px}@media(max-width:600px){.header-inner{flex-wrap:wrap;gap:14px;padding:18px 0}.header-inner>.brand{margin:auto}.header-actions{width:100%;justify-content:space-between;gap:14px}.header-actions .member-link{margin-left:auto}.subject-link{font-size:12px}.portuguese-landing .book-title{font-size:29px}}

.launch-plans{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;max-width:1000px;margin:35px auto 0}.launch-plan{display:flex;flex-direction:column;align-items:flex-start;text-align:left;padding:36px;border:2px solid #e6e0ef;border-radius:24px;background:#fff}.launch-plan.featured{border-color:#7441c5;box-shadow:0 12px 35px #7441c51a}.launch-plan h3{font-size:25px;margin:20px 0 8px}.launch-price{font-size:46px;font-weight:800;color:#6d3cbb;margin:12px 0 20px}.launch-plan .check-list{margin:0 0 28px;padding:0;flex:1}.launch-plan .button{width:100%;text-align:center}.launch-plan>small{display:block;width:100%;text-align:center;margin-top:14px;color:#6a6175}.bonus-library{margin-top:32px}@media(max-width:700px){.launch-plans{grid-template-columns:1fr}.launch-plan{padding:26px}.launch-price{font-size:40px}}