@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Manrope:wght@400;500;600;700;800&display=swap');

:root{--blue:#2085df;--deep-blue:#146fc3;--cream:#efefd5;--ink:#183d59;--paper:#f8f9f5;--muted:#70808a}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:30px}body{margin:0;background:var(--blue);color:white;font-family:'DM Sans',sans-serif;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button,input,summary,a{-webkit-tap-highlight-color:transparent}a:focus-visible,summary:focus-visible{outline:3px solid #d5ea71;outline-offset:6px}svg{display:block}.wrap{width:min(1180px,calc(100% - 96px));margin-inline:auto}.site-header{display:flex;align-items:center;justify-content:space-between;padding-block:29px;border-bottom:1px solid #ffffff35}.brand{display:flex;gap:12px;align-items:center;font-family:'Manrope',sans-serif;font-size:23px;font-weight:800;letter-spacing:-1px}.sumo{width:38px;height:43px}nav{display:flex;align-items:center;gap:36px;font-size:14px;font-weight:500}nav>a:hover{opacity:.75}.nav-cta{border:1px solid #ffffff70;border-radius:8px;padding:12px 18px}.nav-cta span{margin-left:18px}.hero{display:grid;grid-template-columns:1.15fr 1fr;gap:65px;align-items:center;min-height:660px;padding-block:70px 85px}.eyebrow{font-size:10px;font-weight:700;letter-spacing:1.9px;display:flex;gap:9px;align-items:center}.little-dot{width:6px;height:6px;border-radius:50%;background:var(--cream)}h1,h2,h3,p{margin:0}h1,h2,h3{font-family:'Manrope',sans-serif}h1{font-size:clamp(44px,4.8vw,65px);letter-spacing:-3.4px;line-height:1.14;font-weight:800;margin:25px 0 27px}.underlined{position:relative;white-space:nowrap;color:var(--cream)}.underlined:after{content:'';position:absolute;bottom:-7px;left:0;width:100%;height:8px;border-top:2px solid var(--cream);border-radius:50%;transform:rotate(-2deg)}.hero-copy>p{font-size:17px;line-height:1.8;color:#e0effc}.button{display:inline-flex;align-items:center;gap:34px;padding:17px 22px;border-radius:8px;font-weight:700;font-size:14px;transition:transform .2s,background .2s}.button:hover{transform:translateY(-3px);background:white}.cream-button{background:var(--cream);color:var(--ink)}.hero-copy>.button{margin-top:30px}.hero-note{display:flex;align-items:center;gap:9px;margin-top:20px;font-size:11px;color:#d1e7fa}.hero-note>span{font-size:16px}.hero-demo{position:relative;display:flex;flex-direction:column;align-items:center;padding-top:10px}.card-stack{width:340px;height:435px;position:relative;perspective:1200px}.card-stack:before,.card-stack:after{content:'';position:absolute;inset:0;border:1px solid #ffffff5e;border-radius:24px;background:#55a3e6;transform:rotate(10deg);box-shadow:0 16px 45px #14599c20}.card-stack:after{background:#b7cdbd;transform:rotate(-6deg);border:0}.flashcard{display:block;position:relative;width:100%;height:100%;z-index:1;transform-style:preserve-3d;transition:transform .7s;cursor:pointer;transform:rotate(3deg)}.card-face{position:absolute;inset:0;backface-visibility:hidden;background:var(--cream);color:var(--deep-blue);border-radius:23px;padding:27px;display:flex;flex-direction:column;align-items:center;box-shadow:0 10px 30px #155da322}.card-top{font-size:7px;font-weight:700;letter-spacing:1.3px;width:100%;display:flex;justify-content:space-between}.card-top>span{letter-spacing:.5px}.main-kanji{font-family:'Hiragino Mincho ProN','Yu Mincho',serif;font-size:230px;font-weight:400;line-height:1;flex:1;display:flex;align-items:center}.card-bottom{display:flex;flex-direction:column;align-items:center;font-size:10px;color:#668b9c;gap:17px}.reveal{color:var(--deep-blue);font-size:11px;font-weight:700;display:flex;align-items:center;gap:11px}.reveal>span{font-size:19px}.card-back{transform:rotateY(180deg);justify-content:space-between}.reading{align-self:flex-start;font-size:15px}.answer-kanji{font-family:'Hiragino Mincho ProN','Yu Mincho',serif;font-size:104px;line-height:1.1}.meaning{font-size:34px}.vocabulary{display:grid;align-self:stretch;gap:5px;font-size:14px}.vocabulary>span:nth-child(even){font-size:11px;color:#658897;margin-bottom:8px}.flip-input{position:absolute;width:1px;height:1px;clip-path:inset(50%);overflow:hidden}.flip-input:checked+.flashcard{transform:rotate(3deg) rotateY(180deg)}.flip-input:focus-visible+.flashcard{outline:3px solid white;outline-offset:8px}.demo-caption{font-size:12px;margin-top:34px;transform:rotate(-4deg);color:#e2eff9}.demo-caption span{font-size:24px;margin-right:8px}.floating-character{position:absolute;color:#b3d6f5;font-family:serif;opacity:.45;user-select:none}.char-one{font-size:68px;left:-12px;top:20px;transform:rotate(-16deg)}.char-two{font-size:73px;right:-12px;bottom:55px;transform:rotate(16deg)}.benefit-strip{background:#1475cd;border-top:1px solid #ffffff16;border-bottom:1px solid #ffffff16}.benefit-strip>.wrap{display:flex;justify-content:space-around;padding-block:23px}.benefit-strip span{font-size:12px;display:flex;gap:13px;align-items:center}.benefit-strip i{font-style:normal;font-size:21px;color:var(--cream)}.library{width:100%;background:var(--paper);color:var(--ink);padding:76px max(48px,calc((100% - 1180px)/2)) 42px}.section-heading{display:flex;align-items:end;justify-content:space-between;margin-bottom:44px;gap:24px}.section-heading .eyebrow{color:var(--deep-blue)}h2{font-size:37px;letter-spacing:-1.6px;font-weight:800;line-height:1.25;margin-top:14px}.section-heading>p{font-size:13px;line-height:1.8;color:var(--muted);padding-bottom:3px}.deck-columns{display:grid;grid-template-columns:1fr 1.28fr;gap:38px}.group-heading{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}.group-heading h3{font-size:21px;letter-spacing:-.7px}.group-heading>span{font-size:8px;letter-spacing:1.3px;color:var(--muted);font-weight:700}.deck-group{border-radius:14px;background:white;border:1px solid #dfe5e5;overflow:hidden}.deck+.deck{border-top:1px solid #e7ebeb}.deck summary{padding:18px 22px;display:flex;align-items:center;gap:18px;cursor:pointer;list-style:none;transition:background .2s}.deck summary::-webkit-details-marker{display:none}.deck summary:hover{background:#f6f8f5}.tile{background:#e9ead1;color:var(--blue);border-radius:8px;width:51px;height:62px;display:flex;align-items:center;justify-content:center;font-size:32px;font-family:'Hiragino Kaku Gothic ProN','Yu Gothic',sans-serif;flex-shrink:0}.deck-label{display:flex;flex-direction:column;gap:6px;flex:1}.deck-label strong{font-size:17px;font-weight:600;letter-spacing:-.5px}.deck-label>span{color:var(--deep-blue);font-size:11px}.level{font-size:9px;letter-spacing:.8px;background:#f2f5f4;color:#718589;padding:5px 7px;border-radius:4px}.arrow{font-size:23px;color:var(--blue);margin-left:6px;transition:transform .2s}.deck[open] .arrow{transform:rotate(90deg)}.deck-preview{margin:0 22px 18px;padding:16px;background:#f4f5e8;border-radius:8px;display:flex;align-items:center;gap:17px;font-size:12px;line-height:1.8;color:#597584}.deck-preview strong{color:var(--deep-blue)}.sample{font-size:42px;color:var(--deep-blue)}.beginner-note{margin:37px 0 0;padding-left:5px}.beginner-note>span{font-size:30px;color:#b7c8bc;font-family:serif}.beginner-note p{color:var(--muted);font-size:12px;line-height:1.8;margin-top:14px}.library-note{text-align:center;margin-top:29px;font-size:11px;color:var(--muted)}.how-section{background:var(--cream);color:var(--ink);padding:70px 0 76px}.how-section .eyebrow{color:#65818d}.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:64px;margin-top:44px}.step-number{font-size:12px;color:var(--deep-blue);display:block;border-bottom:1px solid #cad4be;padding-bottom:14px;margin-bottom:22px}.steps h3{font-size:19px;letter-spacing:-.5px}.steps p{font-size:13px;line-height:1.8;color:#68808a;margin-top:12px}.closing{text-align:center;padding-block:67px 64px}.closing>span{font-size:24px;color:#d2e6f8;font-family:serif}.closing h2{font-size:42px;margin-top:12px}.closing p{font-size:14px;color:#d2e8fb;margin-top:15px}.closing .button{margin-top:26px}footer{display:flex;align-items:center;justify-content:space-between;border-top:1px solid #ffffff35;padding-block:25px;font-size:10px;color:#d2e8fb}.footer-brand{font-family:'Manrope',sans-serif;font-size:17px;font-weight:800;color:white;letter-spacing:-.6px}
@media(min-width:1500px){.hero{min-height:720px}}@media(max-width:1000px){.wrap{width:calc(100% - 64px)}.hero{gap:25px}.card-stack{width:290px;height:390px}.main-kanji{font-size:200px}.char-one{left:-4px}.char-two{right:-5px}.library{padding-inline:32px}.deck-columns{gap:24px}.deck summary{gap:12px;padding-inline:16px}.deck-label strong{font-size:15px}.group-heading>span{font-size:7px}.steps{gap:32px}h1{letter-spacing:-2.5px}.eyebrow{font-size:8px}}
@media(max-width:720px){.wrap{width:calc(100% - 40px)}.site-header{padding-block:20px}.brand{font-size:19px}.sumo{width:30px;height:34px}nav{gap:0}nav>a:not(.nav-cta){display:none}.nav-cta{font-size:11px;padding:10px 12px}.nav-cta span{margin-left:8px}.hero{grid-template-columns:1fr;padding-block:49px 45px;gap:43px;min-height:auto}.hero-copy{text-align:center}.hero-copy>.eyebrow{justify-content:center;font-size:8px;letter-spacing:1.3px}h1{font-size:48px;letter-spacing:-2.5px;margin-top:22px}.hero-copy>p{font-size:14px;line-height:1.8}.hero-note{justify-content:center}.hero-demo{padding-top:8px;max-width:370px;width:100%;margin:auto}.card-stack{width:267px;height:352px}.card-face{padding:23px}.card-top{font-size:6px}.main-kanji{font-size:185px}.char-one{font-size:48px;left:0}.char-two{font-size:53px;right:0}.demo-caption{margin-top:29px}.answer-kanji{font-size:85px}.meaning{font-size:29px}.vocabulary{font-size:12px}.vocabulary>span:nth-child(even){font-size:10px}.benefit-strip>.wrap{gap:14px;padding-block:18px;justify-content:space-between}.benefit-strip span{font-size:8px;gap:6px}.benefit-strip i{font-size:15px}.library{padding:46px 20px 29px}.section-heading{display:block;margin-bottom:29px}h2{font-size:29px;letter-spacing:-1px}.section-heading>p{margin-top:15px;font-size:12px}.deck-columns{grid-template-columns:1fr;gap:29px}.beginner-note{display:none}.group-heading>span{font-size:8px}.deck-label strong{font-size:17px}.deck summary{padding:15px 17px;gap:16px}.tile{width:46px;height:57px;font-size:29px}.deck-label>span{font-size:11px}.how-section{padding-block:44px}.steps{grid-template-columns:1fr;gap:28px;margin-top:30px}.steps article{display:grid;grid-template-columns:36px 1fr;column-gap:13px}.step-number{grid-row:span 2;border:0;margin:0;padding-top:5px}.steps h3{font-size:18px}.steps p{margin-top:7px;font-size:12px;max-width:320px}.closing{padding-block:45px}.closing h2{font-size:32px}footer{flex-wrap:wrap;gap:16px;font-size:9px}footer>span{order:3;width:100%;margin-top:-5px}.footer-brand{font-size:16px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important}}
/* Keep the deck section full bleed at every responsive breakpoint. */
.library.wrap{width:100%}

.app-icon{width:44px;height:44px;border-radius:10px;display:block}.hero-actions{display:flex;flex-wrap:wrap;align-items:center;gap:18px;margin-top:30px}.browse-link{font-size:12px;color:#e0effc}.browse-link:hover,.email-link:hover{text-decoration:underline}.closing-icon{display:block;margin:0 auto 22px;border-radius:18px;box-shadow:0 8px 24px #14599c30}.closing>span{display:block}.contact-section{background:var(--paper);color:var(--ink);padding:68px 0}.contact-layout{display:grid;grid-template-columns:.85fr 1.15fr;gap:65px}.contact-copy .eyebrow{color:var(--deep-blue)}.contact-copy>p{font-size:14px;line-height:1.8;color:#647983;margin-top:20px}.email-link{display:inline-block;font-size:13px;color:var(--deep-blue);margin-top:24px}.contact-form{background:white;border:1px solid #dfe5e5;border-radius:16px;padding:28px}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:18px}.form-field{display:flex;flex-direction:column;gap:9px;margin-bottom:21px}.form-field label{font-size:12px;font-weight:600}.form-field input,.form-field textarea{width:100%;min-width:0;border:1px solid #d7e0e2;border-radius:7px;padding:12px 13px;font:inherit;font-size:14px;color:var(--ink);background:#fbfcfa}.form-field textarea{resize:vertical;min-height:120px}.form-field input::placeholder,.form-field textarea::placeholder{color:#819098}.form-field input:focus-visible,.form-field textarea:focus-visible{outline:2px solid var(--blue);outline-offset:2px}.form-bottom{display:flex;align-items:center;gap:18px}.send-button{background:var(--blue);color:white;border:none;cursor:pointer;font-family:inherit;flex-shrink:0}.send-button:hover{background:var(--deep-blue)}.send-button:focus-visible{outline:3px solid var(--deep-blue);outline-offset:4px}.form-bottom p{font-size:10px;line-height:1.7;color:#647983}.form-bottom p a{text-decoration:underline}
@media(max-width:1000px){nav{gap:20px}.contact-layout{gap:30px}.form-bottom{flex-direction:column;align-items:flex-start}}
@media(max-width:720px){nav{gap:0}.app-icon{width:36px;height:36px;border-radius:8px}.hero-actions{justify-content:center}.contact-section{padding:44px 0}.contact-layout{grid-template-columns:1fr;gap:27px}.contact-form{padding:22px}.form-row{grid-template-columns:1fr;gap:0}.form-bottom{gap:14px}.contact-copy>p{font-size:13px}.hero-actions .button{font-size:12px;gap:18px}footer>a:last-child{margin-left:auto}}