@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Plus+Jakarta+Sans:wght@500;600;700;800&display=swap');
:root{--navy:#17324d;--teal:#087e74;--mint:#ebfaf5;--coral:#ff7768;--ivory:#fff9f3;--muted:#526778;--line:#dbe5e8}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:110px}body{margin:0;color:var(--navy);font:16px/1.65 Inter,Arial,sans-serif;background:#fff}button,a,input,select{-webkit-tap-highlight-color:transparent}button,select{font:inherit}a{color:inherit}button,a{touch-action:manipulation}a:focus-visible,button:focus-visible,summary:focus-visible,select:focus-visible{outline:3px solid #a53b17;outline-offset:5px}button{cursor:pointer}img{max-width:100%;height:auto;display:block}h1,h2,h3,h4{font-family:'Plus Jakarta Sans',Arial,sans-serif;line-height:1.14;letter-spacing:-.045em;margin:0}h1{font-size:clamp(42px,4.6vw,70px);font-weight:800}h2{font-size:clamp(32px,3.5vw,48px);font-weight:800}h3{font-size:22px;letter-spacing:-.025em}p{margin:16px 0;color:var(--muted)}.wrap{width:min(1220px,calc(100% - 64px));margin:auto}.section{padding:96px 0;scroll-margin-top:20px}.eyebrow{text-transform:uppercase;letter-spacing:.16em;font-size:11px;font-weight:800;color:var(--teal);margin-bottom:18px}.lede{font-size:18px;max-width:640px}.section-head{display:flex;justify-content:space-between;gap:40px;align-items:end;margin-bottom:38px}.section-head h2{max-width:680px}.section-head p{max-width:390px;margin-bottom:0}.btn{display:inline-flex;align-items:center;justify-content:center;gap:12px;min-height:51px;border:1px solid transparent;padding:13px 23px;border-radius:9px;background:var(--navy);color:white;text-decoration:none;font-weight:700;font-size:14px;transition:transform .2s,background .2s}.btn:hover{transform:translateY(-2px);background:#264c6d}.btn.teal{background:var(--teal)}.btn.coral{background:var(--coral);color:#17324d}.btn.light{background:white;color:var(--navy);border-color:var(--line)}.btn.ghost{background:transparent;border-color:#ffffff65;color:white}.btn.small{min-height:42px;padding:9px 16px}.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:25px}.pill{display:inline-flex;gap:7px;align-items:center;border-radius:30px;font-size:11px;font-weight:700;padding:7px 12px;background:#fff;color:var(--navy);border:1px solid #dce8e8}.pill:before{content:'✓';color:var(--teal)}.skip{position:fixed;top:-80px;background:white;z-index:100;padding:15px}.skip:focus{top:0}.topbar{font-size:11px;text-align:center;background:var(--navy);color:white;padding:8px;letter-spacing:.04em}.topbar span{color:#8bede0}.header{background:#fffffff5;backdrop-filter:blur(15px);position:sticky;top:0;z-index:30;border-bottom:1px solid var(--line)}.header-inner{height:84px;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{display:flex;align-items:center;gap:10px;text-decoration:none;line-height:1.25;flex-shrink:0}.brand-mark{font-size:23px;background:var(--teal);color:white;border-radius:12px;width:43px;height:43px;display:grid;place-items:center;font-weight:800}.brand strong{font-size:14px;letter-spacing:-.4px}.brand small{display:block;font-size:9px;color:var(--muted);margin-top:4px}.nav{display:flex;align-items:center;gap:18px}.nav a{font-size:11px;font-weight:600;text-decoration:none}.nav a:hover{color:var(--teal)}.menu{display:none;background:none;border:1px solid var(--line);border-radius:8px;padding:8px}.hero{position:relative;overflow:hidden;background:linear-gradient(120deg,#fff9f3 10%,#eef9f5 80%);padding:66px 0 52px}.hero:after{content:'';position:absolute;width:550px;height:550px;background:#c8eee5;border-radius:50%;right:-190px;top:-90px;opacity:.4;pointer-events:none}.hero-grid{display:grid;grid-template-columns:1.05fr 1fr;gap:55px;align-items:center;position:relative;z-index:1}.hero h1 em{font-style:normal;color:var(--teal)}.hero .lede{font-size:16px;max-width:530px}.micro{font-size:11px;color:var(--muted)}.hero-visual{height:540px;position:relative}.photo-window{height:420px;border-radius:150px 24px 24px 24px;overflow:hidden;background:#c4d8cc;position:absolute;inset:0 0 auto 30px}.photo-window img{height:100%;width:100%;object-fit:cover;object-position:72% center}.book-3d{width:196px;transform:perspective(950px) rotateY(-12deg) rotateZ(-5deg);box-shadow:15px 24px 35px #13384f42;position:absolute;right:13px;bottom:7px;border-radius:2px 8px 8px 2px;border-left:6px solid #102d40;background:#102d40}.book-3d:after{content:'';position:absolute;right:-7px;top:5px;bottom:4px;width:7px;background:repeating-linear-gradient(#fff 0 1px,#ddd 1px 2px);border-radius:0 4px 4px 0;z-index:-1}.quote-bubble{position:absolute;left:0;bottom:115px;background:white;border:1px solid var(--line);box-shadow:0 10px 35px #18394e15;border-radius:15px;padding:20px;width:270px;transform:rotate(-3deg);font-size:15px;font-weight:700;line-height:1.5}.quote-bubble small{display:block;text-transform:uppercase;letter-spacing:.12em;color:var(--teal);font-size:9px;margin-bottom:7px}.level-stamp{position:absolute;right:-14px;top:30px;background:#ffe6a3;border:5px solid white;border-radius:50%;width:90px;height:90px;display:flex;flex-direction:column;align-items:center;justify-content:center;line-height:1.2;font-size:11px;transform:rotate(10deg)}.level-stamp strong{font-size:23px}.hero-pills{display:flex;gap:7px;flex-wrap:wrap;margin-top:24px}.benefits{border-bottom:1px solid var(--line)}.benefits-grid{display:grid;grid-template-columns:repeat(4,1fr);padding:30px 0;gap:24px}.benefit{display:flex;gap:12px}.icon{width:38px;height:38px;background:var(--mint);border-radius:10px;display:grid;place-items:center;flex-shrink:0;color:var(--teal);font-weight:700;font-size:19px}.benefit h3{font-size:13px;letter-spacing:0;margin:3px 0}.benefit p{font-size:11px;margin:5px 0 0;line-height:1.6}.why-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:60px;align-items:center}.image-card{position:relative}.image-card img{width:100%;border-radius:22px;aspect-ratio:1.08;object-fit:cover}.image-note{position:absolute;left:20px;right:20px;bottom:20px;padding:20px;background:#ffffffee;border-radius:12px;font-size:13px;font-weight:700}.mini-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px;margin-top:26px}.mini-item{font-size:13px;font-weight:600;display:flex;gap:10px;align-items:start}.check{color:var(--teal)}.notice{font-size:12px;border-left:3px solid #12b8a6;padding-left:15px;margin-top:28px}.soft{background:var(--ivory)}.mint{background:var(--mint)}.dialogues{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.dialogue{border:1px solid var(--line);border-radius:16px;background:white;overflow:hidden;align-self:start}.dialogue summary{cursor:pointer;list-style:none;padding:24px;position:relative}.dialogue summary:after{content:'+';position:absolute;right:20px;top:25px;font-size:24px;color:var(--teal)}.dialogue[open] summary:after{content:'−'}.dialogue summary::-webkit-details-marker{display:none}.dialogue .num{font-size:10px;font-weight:800;color:var(--teal);letter-spacing:.1em}.dialogue h3{font-size:18px;padding-right:24px;margin:12px 0 7px}.dialogue summary p{font-size:12px;margin:0}.dialogue-body{padding:0 22px 24px}.bubble{border-radius:11px;background:#ebfaf5;padding:12px 14px;margin:9px 0;font-size:12px}.bubble.other{background:#f1f5f8;margin-left:19px}.bubble strong{display:block;font-size:9px;text-transform:uppercase;letter-spacing:.06em;margin-bottom:5px;color:#4d6873}.phrase{font-weight:700;color:#075e56}.practice-tip{font-size:11px;color:var(--muted);margin:15px 0}.listen{background:none;border:1px solid var(--line);border-radius:7px;padding:8px 12px;font-size:11px;font-weight:700;color:var(--navy)}.vocab-layout{display:grid;grid-template-columns:1fr 1.05fr;gap:60px;align-items:center}.category-tabs{display:flex;flex-wrap:wrap;gap:8px;margin:24px 0}.category-tabs button{border:1px solid var(--line);background:white;color:var(--navy);padding:8px 12px;border-radius:30px;font-size:11px;font-weight:700}.category-tabs button[aria-pressed=true]{background:var(--navy);color:white;border-color:var(--navy)}.word-list{display:flex;gap:8px;flex-wrap:wrap}.word-list span{font-size:13px;color:var(--teal);padding:3px 0}.word-list span:not(:last-child):after{content:' /';margin-left:8px;color:#a0b5b0}.flash-shell{padding:24px;background:white;border-radius:22px;box-shadow:0 20px 70px #12324d0d;border:1px solid #d5e9e2}.flash-top{display:flex;align-items:center;justify-content:space-between;font-size:11px;font-weight:700}.progress{background:#eaf0ef;height:5px;border-radius:10px;margin:14px 0 22px;overflow:hidden}.progress i{display:block;height:100%;background:var(--teal);transition:width .3s}.flashcard{width:100%;background:var(--mint);border:1px solid #cce6de;border-radius:13px;min-height:235px;padding:30px 20px;text-align:center;color:var(--navy);display:flex;align-items:center;justify-content:center;flex-direction:column;transition:background .25s}.flashcard.flipped{background:#fff3d8}.flashcard strong{font-size:37px;font-family:'Plus Jakarta Sans',sans-serif;letter-spacing:-.04em}.flashcard .meaning{font-size:23px;line-height:1.3}.flashcard em{font-style:normal;font-size:13px;margin-top:15px}.flashcard small{margin-top:23px;font-size:10px;color:var(--muted)}.flash-controls{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-top:18px}.text-btn{background:none;border:none;padding:8px;color:var(--teal);font-size:11px;font-weight:700}.quiz-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:70px}.quiz-card{background:white;border:1px solid var(--line);border-radius:20px;padding:30px;box-shadow:0 10px 40px #16334d08}.quiz-card h3{font-size:23px;margin:22px 0}.answers{display:grid;gap:10px}.answer{display:flex;gap:13px;align-items:center;border:1px solid var(--line);border-radius:9px;padding:14px;font-size:13px;font-weight:500;background:white;color:var(--navy);text-align:left}.answer:hover:not(:disabled){background:var(--mint);border-color:var(--teal)}.answer b{font-size:11px;border:1px solid var(--line);border-radius:5px;width:25px;height:25px;display:grid;place-items:center;flex-shrink:0}.answer.correct{background:#e4f7ef;border-color:var(--teal)}.answer.wrong{background:#fff0ec;border-color:#c65744}.answer:disabled{cursor:default;opacity:1;color:var(--navy)}.feedback{font-size:13px;margin-top:17px}.score{font-size:56px;color:var(--teal);font-weight:800;line-height:1.2}.roadmap{display:grid;grid-template-columns:repeat(4,1fr);gap:26px;margin-top:35px}.roadmap article{border-top:2px solid #b2d9d2;padding-top:24px}.roadmap b{display:inline-grid;place-items:center;border-radius:50%;background:#d5f3e9;width:38px;height:38px;margin-bottom:18px;font-size:13px}.roadmap h3{font-size:18px}.roadmap p{font-size:12px}.book-section{background:var(--navy);color:white;overflow:hidden}.book-layout{display:grid;grid-template-columns:.9fr 1.1fr;gap:90px;align-items:center}.book-stage{min-height:520px;display:grid;place-items:center;position:relative}.book-stage:before{content:'';position:absolute;width:360px;height:360px;background:#2b5261;border-radius:50%}.book-stage .book-3d{position:relative;width:280px;right:auto;bottom:auto;transform:perspective(1000px) rotateY(-13deg) rotate(-7deg)}.book-section p{color:#d4e1eb}.book-section .eyebrow{color:#82e6d4}.book-section h2{font-size:46px}.book-facts{display:flex;gap:12px;margin:24px 0}.book-facts span{border:1px solid #ffffff50;border-radius:6px;padding:6px 12px;font-size:11px}.book-points{padding:0;list-style:none;font-size:14px;display:grid;gap:10px}.book-points li:before{content:'✓';color:#82e6d4;margin-right:12px}.preview-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:25px}.preview-card{border:1px solid var(--line);border-radius:15px;padding:17px;background:#f4f7f8;text-decoration:none;transition:transform .2s}.preview-card:hover{transform:translateY(-5px)}.preview-card img{width:100%;height:330px;object-fit:contain;filter:drop-shadow(0 5px 9px #12324d15)}.preview-card h3{font-size:15px;margin:20px 5px 5px}.preview-card p{font-size:11px;margin:5px}.resource{background:#e9f8f4;border-radius:24px;display:grid;grid-template-columns:1fr 1fr;gap:70px;padding:60px;align-items:center}.resource-sheet{background:white;padding:35px;transform:rotate(3deg);box-shadow:0 20px 45px #16334d16;border-radius:4px}.resource-sheet h3{font-size:30px}.resource-sheet .line{padding:12px 0;border-bottom:1px solid #e9eeef;font-size:12px}.resource-sheet .line strong{color:var(--teal);display:block;font-size:9px;text-transform:uppercase;letter-spacing:.08em}.audience{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.audience article{background:white;border:1px solid var(--line);border-radius:15px;padding:24px}.audience h3{font-size:18px;margin:18px 0 12px}.audience p{font-size:12px}.connection-grid{display:grid;grid-template-columns:1fr 1fr;gap:55px;align-items:center}.connection-images{display:grid;grid-template-columns:1fr .8fr;gap:16px;align-items:center}.connection-images img{border-radius:18px;aspect-ratio:.9;object-fit:cover}.connection-images img:nth-child(2){aspect-ratio:.7}.publisher{padding:36px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);display:flex;gap:40px;align-items:center;justify-content:space-between}.publisher h3{font-size:24px}.publisher p{font-size:13px;max-width:650px}.faq-layout{display:grid;grid-template-columns:.75fr 1.25fr;gap:80px}.faq details{border-bottom:1px solid var(--line);padding:18px 0}.faq summary{cursor:pointer;font-size:14px;font-weight:700;list-style:none;padding-right:24px;position:relative}.faq summary:after{content:'+';position:absolute;right:3px}.faq details[open] summary:after{content:'−'}.faq p{font-size:13px}.final{background:linear-gradient(110deg,#17324d,#0d675e);padding:60px;border-radius:24px;color:white;display:grid;grid-template-columns:1fr 210px;gap:50px;align-items:center}.final p{color:#d9eeec;max-width:640px}.final img{width:170px;transform:rotate(7deg);box-shadow:12px 14px 24px #0003;border-radius:3px}.footer{background:#f3f7f7;padding:50px 0 25px}.footer-top{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:60px}.footer-links{display:grid;grid-template-columns:1fr 1fr;gap:8px}.footer a{font-size:12px;text-decoration:none}.footer p{font-size:11px}.footer h4{font-size:13px;letter-spacing:0;margin:0 0 15px}.legal{font-size:10px;color:var(--muted);border-top:1px solid var(--line);margin-top:30px;padding-top:20px;display:flex;gap:25px;justify-content:space-between}.sticky-buy{display:none}.privacy-content{max-width:780px}.privacy-content h2{font-size:25px;margin-top:30px}.badge-label{font-size:10px;letter-spacing:.08em;font-weight:700}.review-list{font-size:12px;padding-left:18px;color:var(--muted)}.review-list li{margin:8px 0}audio{max-width:100%}[hidden]{display:none!important}
@media(min-width:1400px){.hero{padding-top:82px;padding-bottom:65px}}@media(max-width:1150px){.nav{gap:12px}.nav a{font-size:10px}.brand strong{font-size:12px}.wrap{width:calc(100% - 48px)}.hero-grid{gap:25px}.hero-visual{height:500px}.photo-window{height:380px}.section{padding:75px 0}.book-layout{gap:45px}}
@media(max-width:960px){.header-inner{height:72px}.menu{display:block;margin-left:auto}.header-inner>.btn{display:none}.nav{display:none;position:absolute;top:72px;left:0;right:0;background:white;padding:24px;border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch}.nav.open{display:flex}.nav a{font-size:14px;padding:8px}.hero-grid{grid-template-columns:1fr 1fr;gap:24px}.hero-visual{height:460px}.photo-window{height:340px;left:0}.book-3d{width:160px}.quote-bubble{width:220px;font-size:12px;left:-10px;bottom:100px}.level-stamp{right:-5px;top:15px;width:75px;height:75px}.level-stamp strong{font-size:19px}.benefits-grid{grid-template-columns:1fr 1fr}.dialogues{grid-template-columns:1fr 1fr}.why-grid,.vocab-layout,.quiz-layout{gap:35px}.audience{grid-template-columns:1fr 1fr}.book-stage{min-height:430px}.book-stage .book-3d{width:230px}.book-section h2{font-size:36px}.resource{padding:36px;gap:35px}.faq-layout{gap:35px}.section-head{gap:25px}.section-head p{font-size:14px}.final{padding:40px}.connection-grid{gap:30px}}
@media(max-width:680px){.wrap{width:calc(100% - 36px)}.topbar{font-size:9px}.hero{padding:37px 0 32px}.hero-grid{grid-template-columns:1fr;gap:20px}.hero h1{font-size:43px}.hero .lede{font-size:15px}.hero-visual{height:420px;max-width:470px;width:100%;margin:10px auto 0}.photo-window{height:310px;left:20px;right:10px;border-radius:90px 20px 20px 20px}.book-3d{width:150px;right:16px;bottom:8px}.quote-bubble{bottom:85px;left:0;width:215px}.level-stamp{right:0}.hero .actions .btn{font-size:12px;padding:13px 17px}.hero-pills{gap:5px}.pill{font-size:9px;padding:5px 8px}.section{padding:58px 0}.benefits-grid{gap:25px 15px;padding:25px 0}.benefit{gap:9px}.benefit h3{font-size:11px}.benefit p{font-size:10px}.icon{width:31px;height:31px;font-size:15px}.why-grid,.vocab-layout,.quiz-layout,.book-layout,.connection-grid,.faq-layout{grid-template-columns:1fr;gap:30px}.why-grid .image-card{order:2}.image-card img{max-height:380px}.mini-grid{gap:17px}.mini-item{font-size:12px}.section-head{display:block;margin-bottom:28px}.section-head p{margin-top:18px}.dialogues{grid-template-columns:1fr}.dialogue summary{padding:21px}.flash-shell{padding:19px}.flashcard{min-height:220px}.quiz-card{padding:22px}.quiz-layout .lede{font-size:15px}.roadmap{grid-template-columns:1fr 1fr;gap:20px}.roadmap h3{font-size:16px}.roadmap article{padding-top:18px}.roadmap p{font-size:11px}.book-stage{min-height:365px}.book-stage .book-3d{width:225px}.book-stage:before{width:290px;height:290px}.book-section .book-layout{gap:25px}.book-section h2{font-size:36px}.preview-grid{grid-template-columns:1fr;gap:20px}.preview-card{display:grid;grid-template-columns:120px 1fr;align-items:center;gap:12px}.preview-card img{height:170px;grid-row:span 2}.preview-card h3{margin:0;align-self:end}.preview-card p{margin:5px 0;align-self:start}.resource{grid-template-columns:1fr;padding:27px;gap:33px}.resource-sheet{padding:25px}.resource-sheet h3{font-size:25px}.audience{gap:12px}.audience article{padding:18px}.audience h3{font-size:16px}.audience p{font-size:11px}.connection-images{gap:12px}.publisher{display:block;padding:28px 0}.publisher .btn{margin-top:12px}.final{grid-template-columns:1fr;padding:30px;gap:30px}.final img{width:120px;justify-self:center;display:none}.final h2{font-size:32px}.final .actions{display:grid}.footer{padding-bottom:95px}.footer-top{grid-template-columns:1fr 1fr;gap:30px}.footer-top>div:first-child{grid-column:span 2}.legal{display:block}.legal p{font-size:10px}.sticky-buy{display:flex;position:fixed;bottom:0;left:0;right:0;padding:10px 16px calc(10px + env(safe-area-inset-bottom));background:#fffffff5;border-top:1px solid var(--line);z-index:25;justify-content:space-between;align-items:center;gap:15px;backdrop-filter:blur(12px)}.sticky-buy span{font-size:10px;font-weight:700;line-height:1.5}.sticky-buy .btn{min-height:42px;font-size:12px;padding:10px 18px}.preview-card:hover{transform:none}h2{font-size:33px}.lede{font-size:16px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}
@media print{.header,.topbar,.footer,.sticky-buy,.actions{display:none}body{font-size:12pt}.section{padding:15px 0}.wrap{width:100%}a{color:#17324d;text-decoration:none}.resource-sheet{box-shadow:none;transform:none}}


.pdf-edition {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
  gap: clamp(24px, 5vw, 72px);
  align-items: center;
  padding: clamp(24px, 5vw, 64px);
  border: 1px solid #b9ddd4;
  border-radius: 28px;
  background: linear-gradient(135deg, #edf9f6, #fbf8f0);
}
.pdf-edition .micro { margin-bottom: 0; }
.pdf-edition-benefits {
  list-style: none;
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
}
.pdf-edition-benefits li {
  display: grid;
  gap: 4px;
  padding: 14px 18px;
  border-radius: 14px;
  background: #ffffffdc;
  border: 1px solid #d9eae5;
}
.pdf-edition-benefits span { color: #375364; }
.hero-pdf-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: #a5f0e2;
  font-weight: 700;
  text-underline-offset: 4px;
}
@media (max-width: 760px) {
  .pdf-edition { grid-template-columns: 1fr; }
}