:root {
  color-scheme: dark;
  --bg: #040713;
  --bg-deep: #02040c;
  --bg-soft: #091126;
  --bg-violet: #100b20;
  --panel: rgba(255, 255, 255, 0.045);
  --panel-border: rgba(240, 248, 250, 0.12);
  --text: #f0f8fa;
  --muted: #9eabb8;
  --muted-strong: #c3cfd7;
  --accent-a: #70e1e8;
  --accent-b: #64d5b4;
  --accent-c: #b6a1ee;
  --accent-coral: #ff9e91;
  --accent-rose: #d99aaa;
  --accent-moon: #dce8ef;
  --accent-prism: #ffd98c;
  --title-teal: #82d9d7;
  --max: 1180px;
  --page: min(calc(100% - 48px), var(--max));
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--bg);
}

body {
  margin: 0;
  min-height: 100vh;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 76% 14%, rgba(182, 161, 238, .08), transparent 24rem),
    radial-gradient(circle at 18% 34%, rgba(112, 225, 232, .055), transparent 22rem),
    linear-gradient(180deg, var(--bg) 0%, #050817 44%, var(--bg-deep) 100%);
  color: var(--text);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans", "Yu Gothic UI", "Yu Gothic", sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: .2;
  background-image:
    radial-gradient(circle at 18% 22%, rgba(220,232,239,.7) 0 1px, transparent 1.3px),
    radial-gradient(circle at 68% 32%, rgba(112,225,232,.6) 0 1px, transparent 1.3px),
    radial-gradient(circle at 84% 78%, rgba(182,161,238,.55) 0 1px, transparent 1.3px),
    radial-gradient(circle at 34% 72%, rgba(255,158,145,.45) 0 1px, transparent 1.3px);
  background-size: 330px 330px, 470px 470px, 390px 390px, 560px 560px;
}

body > * {
  position: relative;
  z-index: 1;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
}

.site-header {
  width: var(--page);
  margin: 0 auto;
  padding: 28px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  min-width: 0;
  text-decoration: none;
}

.brand-roman {
  color: var(--text);
  font-size: 13px;
  font-weight: 620;
  letter-spacing: .22em;
  white-space: nowrap;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 22px;
  color: var(--muted);
  font-size: 11px;
  letter-spacing: .08em;
}

.header-nav a,
.footer-links a,
.release-links a {
  text-decoration: none;
  transition: color 180ms ease;
}

.header-nav a:hover,
.footer-links a:hover,
.release-links a:hover {
  color: var(--text);
}

.status {
  border: 1px solid var(--panel-border);
  border-radius: 999px;
  padding: 8px 11px;
  color: var(--muted-strong);
  background: rgba(255,255,255,.025);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: .14em;
  white-space: nowrap;
}

.hero {
  width: var(--page);
  min-height: calc(100vh - 92px);
  margin: 0 auto;
  padding: clamp(70px, 9vh, 120px) 0 clamp(100px, 12vh, 160px);
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, .85fr);
  gap: clamp(54px, 8vw, 110px);
  align-items: center;
}

.hero-copy {
  max-width: 720px;
}

.eyebrow,
.section-kicker {
  margin: 0 0 18px;
  color: var(--title-teal);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .22em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0;
  font-size: clamp(52px, 7.1vw, 98px);
  line-height: .96;
  letter-spacing: -.055em;
  font-weight: 560;
}

.hero h1 span {
  color: var(--accent-moon);
}

.hero-ja {
  margin: 24px 0 0;
  color: #d0d9df;
  font-size: clamp(16px, 1.8vw, 21px);
  letter-spacing: .1em;
}

.lead,
.section-lead,
.feature-copy > p,
.release > div > p {
  color: var(--muted);
  line-height: 1.85;
}

.lead {
  max-width: 620px;
  margin: 28px 0 0;
  font-size: 16px;
}

.hero-actions {
  margin-top: 36px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}

.store-button {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 18px;
  border: 1px solid rgba(240,248,250,.15);
  border-radius: 13px;
  background: rgba(240,248,250,.075);
  color: var(--text);
  font-size: 12px;
  font-weight: 650;
  letter-spacing: .04em;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 180ms ease, border-color 180ms ease;
}

.store-button:hover {
  background: rgba(240,248,250,.12);
  border-color: rgba(240,248,250,.3);
}

.store-button:focus-visible {
  outline: 3px solid var(--accent-a);
  outline-offset: 3px;
}

.text-link {
  color: var(--muted-strong);
  font-size: 12px;
  text-decoration: none;
}

.release-note {
  margin: 18px 0 0;
  color: #6f7f8c;
  font-size: 11px;
  line-height: 1.7;
}

.hero-visual {
  min-width: 0;
}

.icon-stage {
  position: relative;
  width: min(100%, 510px);
  margin-left: auto;
  isolation: isolate;
}

.icon-ambient {
  position: absolute;
  inset: 7%;
  z-index: -1;
  width: 86%;
  filter: blur(58px) saturate(.9);
  opacity: .28;
  transform: scale(1.08);
}

.app-icon {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: 23%;
  box-shadow:
    0 34px 90px rgba(0,0,0,.38),
    0 0 0 1px rgba(240,248,250,.08);
}

.kanji-lockup {
  width: min(92%, 420px);
  height: 112px;
  margin: 24px 0 0 auto;
  overflow: hidden;
  display: grid;
  place-items: center;
}

.kanji-logo {
  width: 100%;
  filter: invert(1) grayscale(1) contrast(1.08);
  mix-blend-mode: screen;
  opacity: .78;
  transform: scale(1.28);
}

.section-shell {
  width: var(--page);
  margin: 0 auto;
  padding: clamp(100px, 12vw, 160px) 0;
  border-top: 1px solid rgba(240,248,250,.075);
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, .65fr);
  gap: clamp(36px, 7vw, 100px);
  align-items: end;
}

.section-heading h2,
.feature-copy h2,
.release h2 {
  margin: 0;
  font-size: clamp(42px, 6vw, 76px);
  line-height: 1.02;
  letter-spacing: -.045em;
  font-weight: 520;
}

.section-lead {
  margin: 0;
  max-width: 520px;
  font-size: 15px;
}

.flow {
  margin-top: clamp(64px, 9vw, 108px);
}

.flow-step {
  display: grid;
  grid-template-columns: 90px minmax(0, 1fr);
  gap: 28px;
  padding: 34px 0;
  border-top: 1px solid rgba(240,248,250,.09);
}

.flow-step:last-child {
  border-bottom: 1px solid rgba(240,248,250,.09);
}

.flow-index {
  color: #526271;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .16em;
  padding-top: 5px;
}

.flow-word {
  margin: 0 0 9px;
  color: var(--accent-a);
  font-size: 10px;
  font-weight: 750;
  letter-spacing: .24em;
}

.flow-step:nth-child(2) .flow-word {
  color: var(--accent-c);
}

.flow-step:nth-child(3) .flow-word {
  color: var(--accent-prism);
}

.flow-copy h3 {
  margin: 0;
  font-size: clamp(26px, 3.2vw, 42px);
  line-height: 1.12;
  letter-spacing: -.03em;
  font-weight: 500;
}

.flow-copy p:last-child {
  max-width: 690px;
  margin: 15px 0 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.8;
}

.feature-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, .8fr);
  gap: clamp(60px, 10vw, 130px);
  align-items: center;
}

.feature-split.reverse {
  grid-template-columns: minmax(320px, .8fr) minmax(0, 1fr);
}

.feature-split.reverse .feature-copy {
  order: 2;
}

.feature-split.reverse .replay-quote {
  order: 1;
}

.feature-copy > p {
  max-width: 650px;
  margin: 26px 0 0;
  font-size: 15px;
}

.feature-aside {
  min-height: 300px;
  display: grid;
  align-content: center;
  grid-template-columns: auto 1fr;
  column-gap: 20px;
  row-gap: 22px;
}

.aside-label {
  color: #728290;
  font-size: 10px;
  letter-spacing: .22em;
  font-weight: 700;
}

.aside-label.accent {
  color: var(--accent-prism);
}

.aside-line {
  height: 1px;
  align-self: center;
  background: linear-gradient(90deg, rgba(112,225,232,.5), rgba(182,161,238,.2), transparent);
}

.replay-quote {
  display: flex;
  flex-direction: column;
  gap: 12px;
  color: rgba(240,248,250,.13);
  font-size: clamp(42px, 6vw, 80px);
  line-height: .86;
  font-weight: 650;
  letter-spacing: -.045em;
}

.replay-quote span:nth-child(2) {
  color: rgba(112,225,232,.24);
}

.replay-quote span:nth-child(3) {
  color: rgba(182,161,238,.32);
}

.release {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  gap: 36px;
  align-items: center;
}

.release-icon {
  width: 150px;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: 28px;
  box-shadow: 0 20px 56px rgba(0,0,0,.34);
}

.release h2 {
  font-size: clamp(44px, 7vw, 92px);
  letter-spacing: .045em;
}

.release > div > p {
  margin: 16px 0 0;
}

.release-links {
  display: flex;
  gap: 20px;
  margin-top: 22px;
  color: var(--muted-strong);
  font-size: 12px;
}

.site-footer {
  width: var(--page);
  margin: 0 auto;
  padding: 30px 0 42px;
  border-top: 1px solid rgba(240,248,250,.075);
  display: flex;
  align-items: center;
  gap: 24px;
  color: #6e7c88;
  font-size: 11px;
}

.footer-brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-right: auto;
}

.footer-title {
  color: #cfd8de;
  font-weight: 700;
  letter-spacing: .16em;
}

.footer-subtitle {
  color: #7e8b96;
}

.footer-links {
  display: flex;
  gap: 18px;
}

.copyright {
  white-space: nowrap;
}

/* Shared information pages */
.info-shell,
.privacy-shell {
  position: relative;
  z-index: 1;
  width: min(calc(100% - 48px), 900px);
  margin: 0 auto;
  padding: 72px 0 110px;
}

.info-hero,
.privacy-hero {
  margin-bottom: 44px;
}

.info-hero h1,
.privacy-hero h1 {
  margin: 0;
  font-size: clamp(42px, 7vw, 72px);
  line-height: 1;
  letter-spacing: -.045em;
  font-weight: 540;
}

.info-hero .subtitle,
.privacy-hero .subtitle {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.8;
}

.language-switcher {
  display: flex;
  gap: 8px;
  margin: 28px 0 0;
}

.language-button {
  appearance: none;
  border: 1px solid var(--panel-border);
  border-radius: 999px;
  background: rgba(255,255,255,.035);
  color: var(--muted);
  padding: 8px 12px;
  font: inherit;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
}

.language-button.is-active {
  color: var(--text);
  border-color: rgba(112,225,232,.45);
  background: rgba(112,225,232,.08);
}

.info-section,
.policy-section {
  margin-top: 20px;
  padding: 28px;
  border: 1px solid var(--panel-border);
  border-radius: 20px;
  background: var(--panel);
  backdrop-filter: blur(12px);
}

.info-section h2,
.policy-section h2 {
  margin: 0 0 14px;
  font-size: 20px;
  letter-spacing: -.015em;
}

.info-section p,
.info-section li,
.policy-section p,
.policy-section li {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.85;
}

.info-section p:last-child,
.info-section ul:last-child,
.policy-section p:last-child,
.policy-section ul:last-child {
  margin-bottom: 0;
}

.info-section a,
.policy-section a {
  color: var(--accent-a);
}

.info-section ul,
.policy-section ul {
  margin: 12px 0 0;
  padding-left: 1.25rem;
}

.support-mail {
  display: inline-flex;
  margin-top: 8px;
  padding: 12px 15px;
  border: 1px solid rgba(112,225,232,.26);
  border-radius: 12px;
  text-decoration: none;
  background: rgba(112,225,232,.055);
}

.updated {
  color: #cbd6dc;
  font-size: 13px;
  letter-spacing: .02em;
}

[hidden] {
  display: none !important;
}

@media (max-width: 900px) {
  :root {
    --page: min(calc(100% - 36px), var(--max));
  }

  .header-nav > a {
    display: none;
  }

  .hero {
    min-height: auto;
    grid-template-columns: 1fr;
    gap: 64px;
    padding-top: 80px;
  }

  .hero-copy {
    max-width: 760px;
  }

  .hero-visual {
    width: min(100%, 640px);
    margin: 0 auto;
  }

  .icon-stage {
    margin: 0 auto;
  }

  .kanji-lockup {
    margin-right: auto;
  }

  .section-heading,
  .feature-split,
  .feature-split.reverse {
    grid-template-columns: 1fr;
  }

  .feature-split.reverse .feature-copy,
  .feature-split.reverse .replay-quote {
    order: initial;
  }

  .feature-aside {
    min-height: 220px;
  }

  .replay-quote {
    font-size: clamp(42px, 12vw, 78px);
  }

  .site-footer {
    flex-wrap: wrap;
  }

  .copyright {
    width: 100%;
  }
}

@media (max-width: 600px) {
  :root {
    --page: min(calc(100% - 28px), var(--max));
  }

  .site-header {
    padding-top: 20px;
    gap: 14px;
  }

  .brand-roman {
    font-size: 11px;
    letter-spacing: .16em;
  }

  .header-nav {
    gap: 10px;
  }

  .status {
    padding: 7px 9px;
    font-size: 8px;
  }

  .hero {
    padding-top: 62px;
    padding-bottom: 96px;
  }

  .hero h1 {
    font-size: clamp(46px, 15vw, 68px);
  }

  .hero-actions {
    align-items: flex-start;
    flex-direction: column;
  }

  .store-button {
    width: 100%;
  }

  .kanji-lockup {
    height: 90px;
  }

  .section-shell {
    padding: 92px 0;
  }

  .feature-split {
    gap: 44px;
    padding-top: 76px;
    padding-bottom: 76px;
  }

  .flow-step {
    grid-template-columns: 44px minmax(0, 1fr);
    gap: 14px;
    padding: 28px 0;
  }

  .flow-copy h3 {
    font-size: 27px;
  }

  .feature-aside {
    min-height: 124px;
  }

  .release {
    grid-template-columns: 86px minmax(0, 1fr);
    gap: 20px;
  }

  .release-icon {
    width: 86px;
    border-radius: 19px;
  }

  .release h2 {
    font-size: clamp(32px, 10vw, 48px);
    letter-spacing: .03em;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
    gap: 14px;
  }

  .footer-brand {
    margin-right: 0;
  }

  .footer-links {
    flex-wrap: wrap;
  }

  .info-shell,
  .privacy-shell {
    width: min(calc(100% - 28px), 900px);
    padding-top: 48px;
  }

  .info-section,
  .policy-section {
    padding: 22px 20px;
    border-radius: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: .01ms !important;
  }
}