:root{color-scheme:light;--paper:#f6f5f1;--ink:#172333;--muted:#70747b;--blue:#315de3;--line:#dedfdc;--p:0;--memory:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Helvetica,Arial,sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:85px}body{margin:0;-webkit-font-smoothing:antialiased}button,a{-webkit-tap-highlight-color:transparent}button{font:inherit}a{color:inherit;text-decoration:none}button{cursor:pointer}button:focus-visible,a:focus-visible{outline:3px solid #5179f1;outline-offset:6px}button:disabled{cursor:default}.wrap{width:min(1180px,calc(100% - 96px));margin-inline:auto}.skip-link{position:fixed;left:16px;top:-80px;z-index:100;background:white;padding:14px}.skip-link:focus{top:16px}.site-header{position:sticky;top:0;z-index:50;background:rgba(246,245,241,.88);backdrop-filter:blur(24px);-webkit-backdrop-filter:blur(24px);border-bottom:1px solid 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@media(min-width:1500px){.hero{min-height:960px}.hero-copy{padding-top:80px}.hero-stage{height:530px}.hero-deck{top:50px}.hero-japanese{top:55px}}
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@media(max-width:760px){.wrap{width:calc(100% - 40px)}.nav{height:68px}.brand{font-size:15px;gap:7px}.brand img{width:27px;height:27px}.nav-right{gap:12px}.android{font-size:9px;display:flex;flex-direction:column;gap:3px;text-align:center}.android span{font-size:7px;padding:0;border:0;margin:0}.button-small{font-size:10px;padding:11px 12px;gap:7px}.hero{min-height:auto}.hero-copy{padding-top:49px}.eyebrow{font-size:8px;letter-spacing:1.5px}h1{font-size:clamp(48px,9.2vw,70px);letter-spacing:-2.9px;margin-top:24px}.hero-description{font-size:14px;margin-top:20px}.hero-stage{height:393px;margin-top:9px}.hero-deck{transform:translateX(-50%) translateY(calc(var(--p)*-20px)) scale(.77);transform-origin:top center;top:38px}.left-card{transform:translateX(calc(-155px - var(--p)*30px)) translateY(20px) rotate(-19deg) rotateY(12deg)}.right-card{transform:translateX(calc(180px + var(--p)*30px)) translateY(20px) rotate(17deg) rotateY(-12deg)}.hero-japanese{font-size:220px;letter-spacing:-18px;top:74px}.orbit{width:620px;height:180px;top:160px}.orbit-two{width:700px}.floating-label{font-size:8px;padding:10px 12px}.label-left{top:302px;left:6%}.label-right{top:25px;right:6%}.hero-bottom{padding-bottom:24px;font-size:7px;letter-spacing:.6px;gap:20px}.hero-bottom>span:last-child{display:none}.hero-bottom a{font-size:9px}.cards-section{padding:74px 0 85px}.feature-layout{grid-template-columns:1fr;gap:58px}.section-label{font-size:8px;margin-bottom:22px}h2{font-size:44px;letter-spacing:-2px}.feature-copy>p:not(.eyebrow):not(.interaction-note){font-size:14px;max-width:370px}.category-picker{margin-top:24px}.interactive-deck{width:300px;height:416px}.flip-card{height:390px}.demo-glyph{margin-top:44px;font-size:105px}.memory-section{padding:70px 0 35px}.memory-section h2{font-size:65px;letter-spacing:-3px;margin-bottom:315px}.memory-track{top:274px;left:50%;right:auto;transform:translateX(-50%) scale(.65);transform-origin:center top}.memory-footer{gap:15px}.memory-footer p{font-size:11px}.memory-footer .small-tag{display:none}.practice-section{padding-block:75px}.section-heading{display:block;margin-bottom:28px}.section-heading>p{margin-top:20px;font-size:12px}.practice-grid{grid-template-columns:1fr;gap:18px}.practice-grid article{padding:28px 26px 22px}h3{font-size:34px}.question-example>p[lang]{font-size:17px}.listening-panel .panel-foot{text-align:center}.quiz-panel .panel-foot{text-align:center}.exam-section{padding:10px 0 90px}.result-card{width:300px}.result-float{left:-18px;font-size:9px;padding:15px}.download-section{padding:64px 20px}.download-content h2{font-size:53px;letter-spacing:-2.5px}.download-watermark{font-size:165px;top:165px}.download-content>img{width:60px;height:60px;border-radius:17px}.footer{padding-block:30px;gap:25px}.footer nav{gap:17px;flex-wrap:wrap}.copyright{font-size:8px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation:none!important;transition:none!important}.js-motion .reveal{opacity:1;transform:none}.floating-card{will-change:auto}}
@media(max-width:380px){.nav .brand{font-size:12px;gap:5px}.nav .brand img{width:23px;height:23px}.nav-right{gap:8px}.button-small{font-size:9px;padding:10px}.hero-copy h1{font-size:43px;letter-spacing:-2.6px}.hero-deck{transform:translateX(-50%) scale(.69)}.interactive-deck{width:250px;height:385px}.flip-card{height:365px}.card-face{padding:22px}.demo-glyph{margin-top:35px}.demo-caption{font-size:6px}.result-card{width:250px;padding:22px}.result-float{left:-5px;font-size:8px;padding:13px 10px}.feature-layout{min-width:0}.practice-grid{min-width:0}.practice-grid article{min-width:0;padding-inline:20px}.question-example{padding:12px}.question-example>p[lang]{font-size:14px;white-space:normal}.download-content h2{font-size:46px}.card-kicker{font-size:7px}.answer-detail{font-size:18px}.answer-meaning{font-size:23px}.memory-section h2{font-size:58px}}
/* The app's canonical Ai Indigo palette (packages/ux_specs). */
:root{--paper:#f4f2eb;--ink:#1c2a45;--muted:#5e6781;--blue:#24467e;--line:#14192814;--success:#2e8b6b;--accent-soft:#e9eef7}
.site-header{background:#f4f2ebeb}.button{background:var(--blue)}.button:hover{background:#37589a}.hero h1>span,h2>span{color:#37589a}.hero-description strong{display:inline-block;font-weight:550;color:var(--blue);margin-top:9px}.hero-japanese{color:#24467e12}.floating-card{background:linear-gradient(140deg,#fff,#f4f2eb)}.live-dot{background:var(--success)}.floating-label{background:#e9eef7eb;color:var(--blue)}.center-card .main-glyph,.demo-glyph,.answer-word{color:var(--blue)}.memory-section{background:#24467e;color:#fff}.memory-section h2 span{color:#b8c9e9}.memory-tile{background:#37589a;box-shadow:0 22px 40px #12294955}.memory-tile.tile-two{background:#4567a1}.memory-tile.tile-three{background:#e9eef7;color:#24467e}.memory-footer p,.memory-section .section-label{color:#d2dced}.listening-panel{background:#e9eef7}.quiz-panel{background:#fff}.question-example{background:#f4f2eb}.score-ring{background:conic-gradient(#2e8b6b 0deg 284deg,#e9eef7 284deg)}.score-row i{background:#2e8b6b}.result-float{background:#e9eef7ed;color:var(--blue)}.download-section{background:#e9eef7}.download-watermark{color:#24467e0b}.download-free{color:var(--blue);font-size:14px;margin-top:22px}.skill-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:30px 0}.skill-strip>span{display:flex;align-items:center;gap:15px;padding:22px;background:#fff;border:1px solid var(--line);border-radius:16px;font-size:14px;color:var(--blue)}.skill-strip b{font-size:27px;font-weight:500}.analytics-section{padding:95px 0 110px;background:#e9eef7}.analytics-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}.analytics-grid article{min-width:0;border-radius:25px;background:#fff;padding:36px}.analytics-star{color:#d89a2e;font-size:24px}.readiness-score{font-size:84px;font-weight:650;letter-spacing:-5px;margin:29px 0 0;line-height:1.1}.readiness-score>span{font-size:23px;letter-spacing:-1px;color:var(--muted);margin-left:10px}.readiness-caption{font-size:17px;color:var(--blue);margin:10px 0 30px}.readiness-track,.pace-track{height:12px;background:#e9eef7;border-radius:20px;position:relative}.readiness-track i,.pace-track i{display:block;width:78.89%;height:100%;background:var(--success);border-radius:20px;transform-origin:left;transition:transform 1.3s ease}.readiness-track b{position:absolute;left:50%;height:22px;top:-5px;width:3px;background:var(--ink)}.track-labels{display:flex;justify-content:space-between;font-size:10px;color:var(--muted);margin:13px 0 27px}.requirement{display:flex;align-items:center;justify-content:space-between;gap:20px;font-size:12px;padding:17px 0;border-top:1px solid var(--line)}.requirement strong{white-space:nowrap;color:var(--success)}.analytics-fine{font-size:10px;line-height:1.7;color:var(--muted);margin:24px 0 0}.pace-panel h3{margin:35px 0 15px}.pace-panel>p:not(.analytics-fine){font-size:14px;line-height:1.6;color:var(--muted);max-width:280px}.pace-metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:15px;margin:32px 0}.pace-metrics small{display:block;font-size:11px;color:var(--muted);margin-bottom:10px}.pace-metrics strong{font-size:39px;letter-spacing:-2px;font-weight:600;color:var(--blue)}.pace-metrics strong span{font-size:17px;margin-left:3px}.pace-track i{width:67.87%;background:#37589a}.decile-marker{position:absolute;left:74.23%;width:9px;height:9px;top:-7px;background:#d89a2e;transform:rotate(45deg)}.median-marker{position:absolute;left:86.96%;top:-4px;width:3px;height:20px;background:var(--ink)}.pace-legend{display:flex;gap:20px;font-size:10px;color:var(--muted);margin:18px 0 30px}.analytics-detail{display:flex;flex-wrap:wrap;gap:8px}.analytics-detail span{font-size:10px;color:var(--blue);padding:8px 10px;border-radius:6px;background:#e9eef7}.js-motion .analytics-grid article:not(.visible) i{transform:scaleX(0)}.screens-section{padding:100px 0 85px;overflow:hidden}.screens-section .section-heading>div>p:not(.eyebrow){color:var(--muted);font-size:14px}.device-picker{display:inline-flex;border:1px solid #24467e22;border-radius:30px;padding:4px;margin-top:15px;background:#e9eef7}.device-picker button{border:0;border-radius:25px;padding:11px 25px;background:transparent;color:var(--muted);font-size:12px}.device-picker button[aria-pressed=true]{background:var(--blue);color:white;box-shadow:0 3px 8px #24467e22}.screens-gallery{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:40px;max-width:980px;margin:48px auto 0;align-items:start}.screens-gallery figure{margin:0;min-width:0}.screens-gallery a{display:block;padding:7px;background:#1c2a45;border-radius:31px;box-shadow:0 22px 45px -20px #1c2a4550;transition:transform .3s}.screens-gallery a:hover{transform:translateY(-7px)}.screens-gallery img{display:block;width:100%;height:auto;border-radius:24px}.screens-gallery figcaption{font-size:12px;color:var(--blue);display:flex;justify-content:space-between;gap:8px;margin-top:22px}.screens-gallery[data-device=ipad]{max-width:1180px;gap:25px}.screens-gallery[data-device=ipad] a{border-radius:20px;padding:6px}.screens-gallery[data-device=ipad] img{border-radius:14px}.gallery-note{text-align:center;font-size:11px;color:var(--muted);margin-top:35px}
@media(max-width:760px){.skill-strip{grid-template-columns:1fr 1fr;gap:10px}.skill-strip>span{padding:16px;font-size:12px;gap:12px}.analytics-section{padding:65px 0}.analytics-grid{grid-template-columns:1fr;gap:18px}.analytics-grid article{padding:26px}.readiness-score{font-size:72px}.pace-metrics strong{font-size:34px}.screens-section{padding:65px 0}.screens-gallery,.screens-gallery[data-device=ipad]{display:flex;overflow-x:auto;scroll-snap-type:x mandatory;gap:22px;padding:8px 10px 30px;margin-top:30px;scrollbar-color:#24467e #e9eef7}.screens-gallery figure{flex:0 0 76%;scroll-snap-align:center}.screens-gallery[data-device=ipad] figure{flex-basis:92%}.screens-gallery a{border-radius:26px}.screens-gallery img{border-radius:19px}.screens-gallery figcaption{font-size:11px}.requirement{font-size:11px;gap:10px}.pace-legend{gap:13px;font-size:9px}.hero-description{line-height:1.6}}
@media(prefers-reduced-motion:reduce){.js-motion .analytics-grid article:not(.visible) i{transform:none}}
.listening-still{height:172px;margin:27px 0 19px;border:1px solid #24467e20;border-radius:17px;background:#f4f2eb;display:flex;align-items:center;justify-content:center;gap:14px;position:relative;overflow:hidden}.listening-mark{font-family:"Hiragino Mincho ProN","Yu Mincho",serif;font-size:78px;line-height:1;color:var(--blue);opacity:.92}.listening-lines{display:flex;align-items:center;height:76px;gap:5px}.listening-lines i{display:block;width:4px;border-radius:6px;background:#2e8b6b;opacity:.75}.listening-lines i:nth-child(1){height:23px}.listening-lines i:nth-child(2){height:43px}.listening-lines i:nth-child(3){height:68px}.listening-lines i:nth-child(4){height:35px}.listening-lines i:nth-child(5){height:53px}.listening-chip{position:absolute;left:19px;bottom:16px;font-size:8px;letter-spacing:1.1px;color:var(--muted);font-weight:650}.listening-note{font-size:12px;line-height:1.55;color:var(--muted);max-width:250px;margin:0 0 25px}.listening-panel .panel-foot{margin-top:auto}
.nav-link{display:inline-flex;align-items:center;gap:7px;min-height:44px;padding:10px 4px;font-size:13px;font-weight:600;color:var(--muted)}
.nav-link:hover,.nav-link[aria-current=page]{color:var(--blue)}
.nav-home-icon{display:block;flex-shrink:0}
.decks-page{padding:56px 0 120px}
.decks-page h1{font-size:clamp(40px,5vw,72px);letter-spacing:-3.2px;line-height:1.05;font-weight:600;margin:12px 0 12px}
.decks-page h1 span{color:#37589a}
.decks-page .lede{font-size:16px;line-height:1.7;color:var(--muted);margin:0 0 20px;max-width:460px}
.decks-page .lede strong{color:var(--ink);font-weight:650}
.decks-page .lede code{font-size:13px;font-weight:600}
.decks-cta-row{display:flex;flex-wrap:wrap;gap:10px;margin:0 0 20px}
.decks-cta-row .button{min-height:44px;padding:14px 22px;font-size:14px}
.decks-note{font-size:13px;line-height:1.6;color:var(--muted);max-width:460px;margin:0 0 28px}
.deck-links{list-style:none;margin:0;padding:0;border-top:1px solid var(--line)}
.deck-links a{display:grid;grid-template-columns:1fr auto;grid-template-rows:auto auto;column-gap:24px;row-gap:4px;align-items:baseline;padding:20px 2px;border-bottom:1px solid var(--line);color:var(--ink)}
.deck-links a:hover .deck-name{color:var(--blue)}
.deck-name{font-size:22px;letter-spacing:-.5px;font-weight:550}
.deck-meta{grid-column:1;display:flex;flex-wrap:wrap;gap:6px;align-items:center}
.deck-badge{display:inline-flex;align-items:center;font-size:11px;letter-spacing:.15px;font-weight:600;border:1px solid transparent;border-radius:20px;padding:3px 8px;line-height:1.2}
.deck-badge-en{color:#24467e;background:#e9eef7;border-color:#24467e22}
.deck-badge-zh{color:#8a3d2b;background:#f6e8e2;border-color:#c58f8328}
.deck-badge-beginner{color:#2e8b6b;background:#e4f1ea;border-color:#2e8b6b28}
.deck-badge-mid{color:#9a6b12;background:#f7eed8;border-color:#d89a2e33}
.deck-badge-range{color:#37589a;background:#eceaf5;border-color:#37589a22}
.deck-badge-teacher{color:#fff;background:#24467e;border-color:#24467e}
.deck-badge-builtin{color:#2e8b6b;background:#e4f1ea;border-color:#2e8b6b28}
.deck-src{grid-column:2;grid-row:1 / span 2;align-self:center;font-size:12px;letter-spacing:.2px;font-weight:500;color:var(--muted)}
@media(max-width:760px){.nav-link{font-size:12px}.decks-page{padding:36px 0 80px}.decks-page h1{font-size:36px;letter-spacing:-1.8px}.decks-cta-row .button{width:100%;justify-content:center}.deck-links a{padding:18px 0;column-gap:12px;min-height:44px}.deck-name{font-size:17px}.deck-badge,.deck-src{font-size:10px}}

/* Mobile-first UX review: header, still listening, quiz CTA, gallery, memory. */
html{scroll-padding-top:90px}
.nav{flex-wrap:nowrap;gap:12px}
.brand,.brand>span,.button-small{white-space:nowrap}
.nav-right{flex-shrink:0}
.button-small{min-height:44px;padding:12px 18px}
.card-front .demo-reading{display:none}
.card-back .demo-reading{margin-top:8px;font-size:13px}
.listening-still{flex-direction:column;gap:8px;pointer-events:none;cursor:default;height:148px;background:#f4f2eb;border:1px solid #24467e18;box-shadow:none}
.listening-mark{font-size:64px;opacity:.62}
.listening-lines{display:none}
.listening-chip{position:static;left:auto;bottom:auto;font-size:8px;letter-spacing:.9px;color:var(--muted)}
.skill-strip{display:flex;flex-wrap:wrap;gap:6px 22px;margin:8px 0 28px}
.skill-strip>span{display:inline-flex;align-items:baseline;gap:8px;padding:0;background:transparent;border:0;border-radius:0;font-size:13px;font-weight:500;color:var(--muted)}
.skill-strip b{font-size:15px;font-weight:500;color:var(--blue)}
.quiz-options button{min-height:44px}
.quiz-feedback{margin-bottom:0}
.quiz-downloads{display:none;flex-wrap:wrap;align-items:center;gap:4px 16px;margin-top:12px;font-size:12px;font-weight:600;color:var(--blue)}
.quiz-downloads:not([hidden]){display:flex}
.quiz-downloads a{display:inline-flex;align-items:center;gap:6px;min-height:44px;color:var(--blue)}
.quiz-downloads a:hover{text-decoration:underline;text-underline-offset:3px}
.screens-gallery{grid-template-columns:repeat(3,minmax(0,1fr));max-width:980px}
.screens-gallery img{display:block;width:100%;height:auto;padding:7px;background:#1c2a45;border-radius:31px;box-shadow:0 22px 45px -20px #1c2a4550}
.screens-gallery figcaption{justify-content:flex-start}
.screens-gallery[data-device=ipad] img{border-radius:20px;padding:6px}
@media(max-width:760px){
  html{scroll-padding-top:120px}
  .wrap{width:calc(100% - 32px)}
  .nav{height:68px;gap:8px}
  .brand{font-size:15px}
  .site-header .button-small{font-size:12px;padding:10px 12px;min-height:44px;gap:6px}
  h2{font-size:clamp(32px,8vw,44px);letter-spacing:-1.6px}
  .js-motion .reveal{opacity:1;transform:none}
  .skill-strip{display:flex;gap:8px 18px}
  .skill-strip>span{padding:0;font-size:12px}
  .memory-section{overflow:visible}
  .memory-section h2{margin-bottom:24px}
  .memory-track{position:static;width:auto;height:auto;perspective:none;display:flex;flex-direction:column;gap:12px;top:auto;left:auto;right:auto;transform:none;margin:0 0 28px}
  .track-line{display:none}
  .memory-tile,.memory-tile.tile-one,.memory-tile.tile-two,.memory-tile.tile-three{position:static;transform:none;width:100%;height:auto;left:auto;top:auto;flex-direction:row;align-items:baseline;flex-wrap:wrap;gap:8px 16px;padding:18px 20px}
  .memory-tile>span{margin-top:0;font-size:24px}
  .memory-tile small{margin-top:0}
  .memory-tile b{margin-top:0;margin-left:auto}
  .screens-gallery img{border-radius:26px}
  .screens-gallery[data-device=ipad] img{border-radius:18px}
}
@media(max-width:420px){
  .site-header .button-small > span[aria-hidden]{display:none}
  .site-header .brand{font-size:14px;gap:6px}
  .site-header .button-small{font-size:12px;padding:10px 12px;gap:0}
}
@media(max-width:380px){
  .nav .brand{font-size:14px}
  .nav .brand img{width:24px;height:24px}
  .button-small{font-size:12px;padding:10px 12px}
}
.kana-entry{margin:-8px 0 28px;font-size:14px;font-weight:650}
.kana-entry a{color:var(--blue)}
.kana-entry a:hover{text-decoration:underline;text-underline-offset:3px}
.store-label{display:inline-flex;align-items:center;gap:8px}
.store-mark{width:15px;height:15px;flex:none;display:inline-block;background:currentColor;-webkit-mask:var(--icon) center/contain no-repeat;mask:var(--icon) center/contain no-repeat;-webkit-mask-mode:alpha;mask-mode:alpha}
.store-android{--icon:url("/assets/mark-android.svg")}
.store-ios{--icon:url("/assets/mark-apple.svg")}
.nav-left{display:flex;align-items:center;gap:14px;min-width:0}
.kana-nav{display:inline-flex;align-items:center;justify-content:center;min-height:40px;padding:0 14px;border-radius:10px;background:var(--blue);color:#fff;font-size:13px;font-weight:650;white-space:nowrap;line-height:1}
.kana-nav:hover{background:#37589a;color:#fff}
@media(max-width:760px){.nav-left{gap:8px}.kana-nav{min-height:36px;padding:0 10px;font-size:12px;border-radius:8px}}
.nav-right{gap:16px}
.download-actions{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:10px 12px}
@media(max-width:760px){.nav{height:auto;min-height:64px;padding-block:8px;flex-wrap:wrap;row-gap:6px}.nav-right{gap:8px;margin-left:auto}.site-header .store-prefix{display:none}}
@media(max-width:520px){.hero-actions{flex-direction:column;align-items:center}}