:root {
  color-scheme: light;
  --bg: #eef7ff;
  --ink: #10233a;
  --muted: #61758b;
  --line: rgba(255, 255, 255, 0.72);
  --card: rgba(255, 255, 255, 0.76);
  --blue: #2454ff;
  --navy: #132944;
  --cyan: #9fe2ff;
  --violet: #d9ccff;
  --shadow: 0 24px 80px rgba(33, 70, 110, 0.16);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP", sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(159, 226, 255, 0.9), transparent 34rem),
    radial-gradient(circle at 85% 18%, rgba(217, 204, 255, 0.9), transparent 30rem),
    linear-gradient(135deg, #f8fcff, var(--bg));
  min-height: 100vh;
}

a { color: inherit; text-decoration: none; }

.siteHeader {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 18px 0;
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 900;
  letter-spacing: -0.04em;
  font-size: 1.2rem;
}

.brandMark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 12px;
  color: white;
  background: var(--navy);
  box-shadow: 0 12px 30px rgba(19, 41, 68, 0.22);
}

nav {
  display: flex;
  align-items: center;
  gap: 18px;
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 800;
}

.hero,
.section {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 390px;
  align-items: center;
  gap: clamp(28px, 6vw, 88px);
  min-height: calc(100vh - 72px);
  padding: 36px 0 80px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--blue);
  font-size: 0.78rem;
  font-weight: 950;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1, h2, h3, p { margin-top: 0; }

h1 {
  margin-bottom: 22px;
  max-width: 760px;
  font-size: clamp(3.3rem, 8vw, 6.9rem);
  line-height: 0.93;
  letter-spacing: -0.085em;
}

h2 {
  margin-bottom: 16px;
  font-size: clamp(2rem, 4vw, 3.7rem);
  line-height: 1;
  letter-spacing: -0.07em;
}

h3 {
  margin-bottom: 10px;
  font-size: 1.25rem;
  letter-spacing: -0.04em;
}

.lead {
  max-width: 660px;
  color: var(--muted);
  font-size: clamp(1rem, 2vw, 1.28rem);
  font-weight: 750;
  line-height: 1.9;
}

.heroActions,
.storeButtons {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 30px 0 16px;
}

.primaryButton,
.secondaryButton,
.storeButtons span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  border-radius: 999px;
  padding: 0 22px;
  font-weight: 950;
}

.primaryButton {
  color: white;
  background: var(--blue);
  box-shadow: 0 18px 42px rgba(36, 84, 255, 0.28);
}

.secondaryButton,
.storeButtons span {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid var(--line);
}

.note {
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 800;
}

.phoneDemo {
  position: relative;
  display: grid;
  gap: 14px;
  width: min(100%, 390px);
  min-height: 680px;
  padding: 22px;
  border: 1px solid rgba(255, 255, 255, 0.9);
  border-radius: 44px;
  background: rgba(255, 255, 255, 0.56);
  box-shadow: var(--shadow);
  backdrop-filter: blur(22px);
}

.phoneDemo::before {
  content: "";
  position: absolute;
  top: 12px;
  left: 50%;
  width: 92px;
  height: 5px;
  border-radius: 99px;
  background: rgba(16, 35, 58, 0.16);
  transform: translateX(-50%);
}

.phoneTop {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 20px;
  color: var(--muted);
  font-size: 0.84rem;
  font-weight: 900;
}

.phoneTop strong { color: var(--blue); }

.translationCard {
  display: grid;
  align-content: center;
  min-height: 190px;
  padding: 22px;
  border: 1px solid rgba(210, 226, 241, 0.9);
  border-radius: 28px;
  background: rgba(248, 251, 255, 0.9);
}

.translationCard.dark {
  color: white;
  background: var(--navy);
  border-color: var(--navy);
}

.translationCard small {
  color: #6aa8ff;
  font-weight: 950;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.translationCard p {
  margin: 12px 0;
  font-size: 1.35rem;
  font-weight: 950;
  line-height: 1.25;
  letter-spacing: -0.04em;
}

.translationCard b {
  color: inherit;
  opacity: 0.78;
  line-height: 1.6;
}

.bridgeLine {
  display: grid;
  place-items: center;
  min-height: 34px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 950;
  letter-spacing: 0.08em;
}

.micButton {
  justify-self: center;
  display: grid;
  place-items: center;
  width: 86px;
  height: 86px;
  border: 0;
  border-radius: 50%;
  background: var(--blue);
  box-shadow: 0 22px 45px rgba(36, 84, 255, 0.32);
}

.micButton span {
  width: 26px;
  height: 38px;
  border-radius: 18px;
  background: white;
  box-shadow: 0 14px 0 -10px white, 0 22px 0 -10px white;
}

.section {
  padding: 72px 0;
}

.sectionHead {
  max-width: 680px;
  margin-bottom: 28px;
}

.featureGrid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.featureGrid article,
.pricingCards article,
.downloadPanel,
.faq details {
  border: 1px solid var(--line);
  border-radius: 28px;
  background: var(--card);
  box-shadow: 0 18px 55px rgba(33, 70, 110, 0.09);
  backdrop-filter: blur(18px);
}

.featureGrid article,
.pricingCards article {
  padding: 24px;
}

.featureGrid p,
.split p,
.downloadPanel p,
.faq p {
  color: var(--muted);
  font-weight: 760;
  line-height: 1.75;
}

.split {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 32px;
  align-items: center;
}

.pricingCards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.pricingCards span {
  color: var(--blue);
  font-weight: 950;
}

.pricingCards strong {
  display: block;
  margin: 14px 0;
  font-size: 2rem;
  letter-spacing: -0.06em;
}

.proCard {
  color: white;
  background: var(--navy) !important;
}

.proCard p,
.proCard span { color: rgba(255, 255, 255, 0.72); }

.downloadPanel {
  padding: clamp(28px, 6vw, 64px);
  text-align: center;
}

.downloadPanel p { margin-inline: auto; max-width: 620px; }

.storeButtons { justify-content: center; }

.faq {
  display: grid;
  gap: 12px;
  padding-bottom: 96px;
}

.faq details { padding: 22px 24px; }

.faq summary {
  cursor: pointer;
  font-weight: 950;
  letter-spacing: -0.03em;
}

.faq p { margin: 14px 0 0; }

footer {
  display: flex;
  justify-content: center;
  gap: 18px;
  padding: 34px 16px;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 800;
}

@media (max-width: 900px) {
  nav { display: none; }

  .hero {
    grid-template-columns: 1fr;
    min-height: 0;
    padding-top: 34px;
  }

  .phoneDemo {
    justify-self: center;
    min-height: 610px;
  }

  .featureGrid,
  .split,
  .pricingCards {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 520px) {
  .hero, .section, .siteHeader { width: min(100% - 22px, 1120px); }

  h1 { font-size: clamp(2.8rem, 17vw, 4.6rem); }

  .phoneDemo {
    padding: 16px;
    border-radius: 34px;
    min-height: 560px;
  }

  .translationCard {
    min-height: 160px;
    border-radius: 22px;
    padding: 18px;
  }

  .translationCard p { font-size: 1.12rem; }
}