@import url("https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@600;700;800&family=Noto+Sans+JP:wght@500;700;800&display=swap");

:root {
  color-scheme: light;
  --ink: #26272d;
  --muted: #777983;
  --paper: #fffaf4;
  --card: #ffffff;
  --line: #eee6dc;
  --orange: #e79055;
  --orange-dark: #c96f36;
  --orange-soft: #fff0e2;
  --green: #5fc381;
  --blue: #6aa3f0;
  --purple: #9a8be7;
  --shadow: 0 24px 70px rgba(86, 59, 37, 0.12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Plus Jakarta Sans", "Noto Sans JP", ui-sans-serif, system-ui, sans-serif;
}
a { color: inherit; }
img { max-width: 100%; }
.site-nav {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; justify-content: space-between; gap: 20px;
  padding: 13px max(22px, calc((100vw - 1160px) / 2));
  border-bottom: 1px solid rgba(238, 230, 220, .8);
  background: rgba(255, 250, 244, .88);
  backdrop-filter: blur(18px) saturate(140%);
}
.nav-brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 18px; text-decoration: none; }
.nav-brand img, .footer-brand img { border-radius: 10px; }
.nav-links { display: flex; gap: 26px; }
.nav-links a, .footer-links a { color: var(--muted); font-weight: 700; font-size: 14px; text-decoration: none; }
.nav-links a:hover, .footer-links a:hover { color: var(--orange-dark); }
main { overflow: hidden; }
.hero, .section { width: min(calc(100% - 40px), 1160px); margin: 0 auto; }
.hero {
  min-height: 700px; display: grid; grid-template-columns: 1.05fr .95fr; align-items: center; gap: 54px;
  padding: 70px 0 76px;
}
.eyebrow { margin: 0 0 13px; color: var(--orange-dark); font-size: 12px; font-weight: 800; letter-spacing: .15em; }
h1, h2, h3, p { overflow-wrap: anywhere; }
h1 { margin: 0; font-size: clamp(44px, 5.6vw, 72px); line-height: 1.08; letter-spacing: -.055em; }
h1 span { color: var(--orange); }
.lead { max-width: 640px; margin: 26px 0 0; color: var(--muted); font-size: 17px; line-height: 1.9; }
.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; margin-top: 30px; }
.button {
  min-height: 56px; display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  padding: 0 24px; border-radius: 16px; font-weight: 800; text-decoration: none;
  transition: transform .18s ease, box-shadow .18s ease;
}
.button:hover { transform: translateY(-2px); }
.appstore { min-width: 198px; background: #1e2024; color: #fff; box-shadow: 0 7px 0 #090a0c; }
.appstore span { display: flex; flex-direction: column; font-size: 16px; line-height: 1.05; }
.appstore small { margin-bottom: 2px; font-size: 9px; letter-spacing: .05em; }
.secondary { border: 2px solid var(--line); background: #fff; color: var(--orange-dark); box-shadow: 0 4px 0 #eadfd3; }
.hero-points { display: flex; flex-wrap: wrap; gap: 18px; margin-top: 24px; color: var(--muted); font-size: 12px; font-weight: 700; }
.hero-visual { position: relative; min-height: 570px; display: flex; align-items: center; justify-content: center; }
.hero-visual::before {
  content: ""; position: absolute; width: 480px; height: 480px; border-radius: 50%;
  background: linear-gradient(145deg, #ffe3c9, #fff5e9 65%); box-shadow: inset 0 0 0 1px #ffe6ce;
}
.sun { position: absolute; top: 38px; right: 66px; width: 64px; height: 64px; border-radius: 50%; background: #ffd677; }
.hero-landmark { position: absolute; width: 174px; right: 1px; top: 125px; opacity: .2; }
.phone {
  position: relative; overflow: hidden; padding: 9px; border-radius: 39px; background: #17181b;
  box-shadow: 0 28px 60px rgba(42, 32, 24, .25);
}
.phone::before {
  content: ""; position: absolute; z-index: 5; top: 16px; left: 50%; transform: translateX(-50%);
  width: 72px; height: 20px; border-radius: 99px; background: #111;
}
.hero-phone { width: 273px; height: 554px; transform: rotate(3deg); }
.phone-screen { position: relative; width: 100%; height: 100%; overflow: hidden; border-radius: 31px; background: #f7f8fb; }
.reel-demo > img { width: 100%; height: 100%; object-fit: cover; }
.reel-shade { position: absolute; inset: 0; background: linear-gradient(transparent 25%, rgba(10, 10, 14, .05) 45%, rgba(10, 10, 14, .86)); }
.reel-top { position: absolute; inset: 40px 18px auto; display: flex; justify-content: space-between; color: white; font-size: 12px; font-weight: 800; }
.quiz-card {
  position: absolute; left: 10px; right: 10px; bottom: 12px; padding: 15px; border-radius: 22px;
  background: rgba(20, 21, 25, .86); backdrop-filter: blur(12px); color: white;
}
.quiz-card p { margin: 0 0 5px; color: #f6c28f; font-size: 10px; font-weight: 800; text-transform: uppercase; }
.quiz-card strong { display: block; margin-bottom: 10px; font-size: 16px; }
.quiz-card button { width: 100%; margin-top: 7px; padding: 8px 10px; border: 0; border-radius: 10px; background: rgba(255,255,255,.14); color: #fff; text-align: left; font: 700 11px inherit; }
.hero-mascot { position: absolute; width: 140px; left: -3px; bottom: 18px; transform: rotate(-7deg); filter: drop-shadow(0 15px 18px rgba(86, 59, 37, .18)); }
.floating-chip { position: absolute; padding: 11px 15px; border-radius: 14px; background: #fff; box-shadow: var(--shadow); font-size: 12px; font-weight: 800; }
.chip-one { top: 110px; left: -22px; }
.chip-two { right: 0; bottom: 84px; color: var(--green); }
.section { padding: 90px 0; border-top: 1px solid var(--line); }
.section-heading { max-width: 680px; margin: 0 auto 46px; text-align: center; }
.section-heading.left { margin: 0; text-align: left; }
.section-heading h2, .feature-band h2, .languages h2, .cta h2 { margin: 0; font-size: clamp(32px, 4.2vw, 52px); line-height: 1.16; letter-spacing: -.04em; }
.section-heading > p:last-child { margin: 17px 0 0; color: var(--muted); line-height: 1.8; }

.data-use { max-width: 900px; }
.data-use-card {
  padding: 30px 34px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--card);
  box-shadow: var(--shadow);
}
.data-use-card p { margin: 0; color: var(--muted); line-height: 1.8; }
.data-use-card a { display: inline-block; margin-top: 18px; color: var(--orange-dark); font-weight: 800; }
.step-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.step-card {
  position: relative; padding: 18px 18px 24px; border: 1px solid var(--line); border-radius: 26px; background: #fff;
  box-shadow: 0 12px 30px rgba(86, 59, 37, .05);
}
.step-card.featured { transform: translateY(-12px); }
.step-number { position: absolute; z-index: 2; top: 30px; left: 30px; display: grid; place-items: center; width: 38px; height: 38px; border-radius: 12px; background: var(--orange); color: #fff; font-size: 11px; font-weight: 800; }
.step-media, .mini-quiz, .explain-card { height: 265px; border-radius: 19px; overflow: hidden; background: var(--orange-soft); }
.step-media img { width: 100%; height: 100%; object-fit: cover; }
.step-card h3 { margin: 22px 6px 8px; font-size: 20px; }
.step-card > p { margin: 0 6px; color: var(--muted); font-size: 14px; line-height: 1.75; }
.mini-quiz { display: flex; flex-direction: column; justify-content: center; gap: 9px; padding: 30px 22px; background: #2e3036; color: #fff; }
.mini-quiz > span { align-self: flex-end; color: #ffd777; font-size: 10px; font-style: normal; }
.mini-quiz strong { margin-bottom: 6px; font-size: 17px; }
.mini-quiz i { padding: 11px 12px; border: 1px solid rgba(255,255,255,.14); border-radius: 10px; background: rgba(255,255,255,.08); font-size: 11px; font-style: normal; }
.mini-quiz i:first-of-type { border-color: #77d39c; background: rgba(95,195,129,.2); }
.explain-card { display: flex; flex-direction: column; justify-content: center; padding: 32px 24px; background: #effaf3; }
.explain-card span { color: #42a868; font-size: 10px; font-weight: 800; letter-spacing: .12em; }
.explain-card strong { margin-top: 18px; font-size: 24px; }
.explain-card em { margin-top: 5px; color: var(--muted); font-size: 13px; font-style: normal; }
.explain-card p { margin: 24px 0 0; padding-top: 17px; border-top: 1px solid #cde9d7; color: #5f7466; font-size: 12px; }
.feature-band { display: grid; grid-template-columns: .78fr 1.22fr; gap: 76px; align-items: start; }
.feature-list { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.feature-list article { display: flex; gap: 14px; min-height: 164px; padding: 22px; border: 1px solid var(--line); border-radius: 22px; background: #fff; }
.feature-list article > span { flex: 0 0 auto; display: grid; place-items: center; width: 42px; height: 42px; border-radius: 13px; background: var(--orange-soft); color: var(--orange-dark); font-size: 20px; font-weight: 800; }
.feature-list article:nth-child(2) > span { background: #effaf3; color: #3caa64; }
.feature-list article:nth-child(3) > span { background: #eef4fd; color: #568dd6; }
.feature-list article:nth-child(4) > span { background: #f1effd; color: #8372d7; }
.feature-list h3 { margin: 3px 0 8px; font-size: 16px; }
.feature-list p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.7; }
.inside { text-align: center; }
.screens { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; align-items: center; max-width: 920px; margin: 0 auto; }
.screens figure { margin: 0; }
.screens-main { transform: translateY(-18px); }
.screen-phone { width: min(100%, 260px); aspect-ratio: 427 / 788; margin: 0 auto; padding: 7px; border-radius: 34px; }
.screen-phone > img { width: 100%; height: 100%; border-radius: 27px; object-fit: cover; object-position: center; }
.screens figure:first-child .screen-phone > img { object-fit: cover; object-position: center; }
.screens figcaption { display: flex; flex-direction: column; gap: 5px; margin-top: 20px; }
.screens figcaption strong { font-size: 16px; }
.screens figcaption span { color: var(--muted); font-size: 12px; }
.mock-review { padding: 45px 18px 20px; background: #f6f7fb; text-align: left; }
.mock-review::before { top: 12px; }
.review-head small { color: var(--purple); font-size: 9px; font-weight: 800; }
.review-head strong { display: block; margin-top: 5px; font-size: 19px; }
.review-head > span { color: var(--muted); font-size: 10px; }
.review-item { position: relative; display: flex; flex-direction: column; gap: 4px; margin-top: 12px; padding: 14px; border-radius: 14px; background: #fff; box-shadow: 0 5px 14px rgba(20,28,48,.06); }
.review-item b { font-size: 12px; }
.review-item span { color: var(--muted); font-size: 9px; }
.review-item i { position: absolute; right: 12px; top: 18px; color: var(--orange); font-size: 10px; font-style: normal; }
.review-streak { display: grid; grid-template-columns: auto auto 1fr; align-items: center; gap: 6px; margin-top: 14px; padding: 14px; border-radius: 14px; background: #fff2e6; font-size: 14px; }
.review-streak strong { font-size: 20px; }
.review-streak span { color: var(--muted); font-size: 9px; }
.languages { display: grid; grid-template-columns: .8fr 1.2fr; gap: 70px; align-items: center; }
.language-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.language-grid span { display: flex; align-items: center; gap: 10px; padding: 17px; border: 1px solid var(--line); border-radius: 16px; background: #fff; font-size: 23px; }
.language-grid b { font-size: 12px; }
.cta { position: relative; overflow: hidden; padding: 78px 30px; border: 0; border-radius: 34px; background: #e79055; color: #fff; text-align: center; }
.cta::before, .cta::after { content: ""; position: absolute; border-radius: 50%; background: rgba(255,255,255,.1); }
.cta::before { width: 320px; height: 320px; left: -120px; top: -160px; }
.cta::after { width: 260px; height: 260px; right: -80px; bottom: -130px; }
.cta > * { position: relative; z-index: 1; }
.cta img { position: absolute; z-index: 2; left: 45px; bottom: -8px; width: 176px; }
.cta .eyebrow { color: #ffe8d5; }
.cta p:not(.eyebrow) { margin: 18px 0 28px; color: #fff3e8; }
.cta .appstore { margin: 0 auto; }
.site-footer { margin-top: 90px; padding: 40px max(22px, calc((100vw - 1160px) / 2)); border-top: 1px solid var(--line); background: #fff; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.footer-brand { display: flex; align-items: center; gap: 10px; font-weight: 800; }
.footer-links { display: flex; flex-wrap: wrap; gap: 20px; }
.footer-copy { margin: 24px 0 0; color: var(--muted); font-size: 11px; }
.legal-page { width: min(calc(100% - 40px), 780px); margin: 0 auto; padding: 70px 0 90px; }
.legal-page h1 { font-size: clamp(36px, 6vw, 56px); }
.legal-page h2 { margin: 38px 0 10px; font-size: 22px; }
.legal-page h3 { margin: 28px 0 7px; }
.legal-page p, .legal-page li { color: var(--muted); line-height: 1.8; }
.legal-page a { color: var(--orange-dark); font-weight: 700; }
.lang-toggle { display: inline-flex; gap: 4px; margin-bottom: 32px; padding: 4px; border: 1px solid var(--line); border-radius: 99px; background: #fff; }
.lang-toggle button { border: 0; padding: 8px 18px; border-radius: 99px; background: transparent; color: var(--muted); font: 800 13px inherit; cursor: pointer; }
.lang-toggle button.active { background: var(--orange); color: #fff; }
.lang-pane[hidden] { display: none; }

@media (max-width: 820px) {
  .nav-links a:nth-child(-n+3) { display: none; }
  .hero { grid-template-columns: 1fr; padding-top: 50px; }
  .hero-copy { text-align: center; }
  .lead { margin-left: auto; margin-right: auto; }
  .actions, .hero-points { justify-content: center; }
  .hero-visual { min-height: 560px; }
  .step-grid { grid-template-columns: 1fr; max-width: 520px; margin: 0 auto; }
  .step-card.featured { transform: none; }
  .feature-band, .languages { grid-template-columns: 1fr; gap: 38px; }
  .section-heading.left { text-align: center; margin: 0 auto; }
  .screens { grid-auto-flow: column; grid-auto-columns: 68%; grid-template-columns: none; gap: 22px; overflow-x: auto; margin: 0 -20px; padding: 20px; scroll-snap-type: x mandatory; }
  .screens figure { scroll-snap-align: center; }
  .screens-main { transform: none; }
  .cta img { opacity: .24; left: -12px; width: 165px; }
}

@media (max-width: 560px) {
  .site-nav { padding: 11px 16px; }
  .hero, .section { width: min(calc(100% - 30px), 1160px); }
  .hero { gap: 22px; padding-bottom: 54px; }
  h1 { font-size: 43px; }
  .lead { font-size: 15px; }
  .hero-visual { min-height: 500px; transform: scale(.9); margin: -20px -25px; }
  .hero-visual::before { width: 410px; height: 410px; }
  .hero-phone { width: 246px; height: 500px; }
  .hero-mascot { width: 115px; }
  .chip-one { left: 2px; }
  .section { padding: 70px 0; }
  .feature-list { grid-template-columns: 1fr; }
  .language-grid { grid-template-columns: repeat(2, 1fr); }
  .cta { width: min(calc(100% - 30px), 1160px); padding: 66px 22px; }
  .footer-inner { align-items: flex-start; flex-direction: column; }
  .footer-links { gap: 12px 18px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .button { transition: none; }
}