:root {
  --color-bg: #fff8f4;
  --color-surface: #ffffff;
  --color-surface-soft: #fdeef1;
  --color-text: #2f2233;
  --color-text-muted: #6f5f73;
  --color-accent: #c9668a;
  --color-accent-deep: #8a3f66;
  --color-accent-soft: #f3c9d6;
  --color-lavender: #b79fd1;
  --color-line: rgba(47, 34, 51, 0.1);

  --font-display: "Fraunces", "Songti SC", serif;
  --font-body: "Inter", "PingFang SC", "Helvetica Neue", Arial, sans-serif;

  --text-xs: clamp(0.8rem, 0.78rem + 0.1vw, 0.875rem);
  --text-sm: clamp(0.9rem, 0.88rem + 0.15vw, 1rem);
  --text-base: clamp(1rem, 0.96rem + 0.2vw, 1.125rem);
  --text-lg: clamp(1.2rem, 1.1rem + 0.4vw, 1.5rem);
  --text-xl: clamp(1.6rem, 1.3rem + 1.2vw, 2.4rem);
  --text-hero: clamp(2.6rem, 1.8rem + 3.5vw, 5rem);

  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.75rem;
  --space-lg: clamp(2.5rem, 2rem + 2vw, 4.5rem);
  --space-section: clamp(4rem, 3rem + 5vw, 8rem);

  --radius-md: 18px;
  --radius-lg: 28px;

  --duration-normal: 260ms;
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--color-accent-deep);
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.15;
  margin: 0;
}

.wrap {
  width: min(1080px, 100% - 3rem);
  margin-inline: auto;
}

/* language toggling: each translated block carries data-i18n-lang="<code>"; only the block
   matching html[data-lang] is shown. Default-hide, then reveal the active language. */
[data-i18n-lang] { display: none; }
html[data-lang="zh"] [data-i18n-lang="zh"],
html[data-lang="zh-TW"] [data-i18n-lang="zh-TW"],
html[data-lang="ja"] [data-i18n-lang="ja"],
html[data-lang="ko"] [data-i18n-lang="ko"],
html[data-lang="en"] [data-i18n-lang="en"] { display: revert; }

/* ── Nav ─────────────────────────────────────────────────────────────── */

.site-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 248, 244, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-line);
}

.site-nav .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-sm);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-lg);
  text-decoration: none;
  color: var(--color-text);
}

.brand-mark {
  width: 34px;
  height: 34px;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: var(--text-sm);
  font-weight: 500;
  transition: color var(--duration-normal) var(--ease-out-expo);
}

.nav-links a:hover {
  color: var(--color-accent-deep);
}

.lang-toggle {
  border: 1px solid var(--color-line);
  background: var(--color-surface);
  color: var(--color-text);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.03em;
  padding: 0.45rem 0.9rem;
  border-radius: 999px;
  cursor: pointer;
  transition: border-color var(--duration-normal) var(--ease-out-expo),
    transform var(--duration-normal) var(--ease-out-expo);
}

.lang-toggle:hover {
  border-color: var(--color-accent);
  transform: translateY(-1px);
}

/* ── Hero ────────────────────────────────────────────────────────────── */

.hero {
  position: relative;
  overflow: hidden;
  padding-block: var(--space-section) calc(var(--space-section) * 0.6);
}

.hero-glow {
  position: absolute;
  inset: -20% -10% auto auto;
  width: 60vw;
  height: 60vw;
  max-width: 720px;
  max-height: 720px;
  background: radial-gradient(circle at 60% 40%, var(--color-accent-soft) 0%, transparent 70%);
  filter: blur(10px);
  z-index: 0;
  pointer-events: none;
}

.hero .wrap {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--space-lg);
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent-deep);
  margin-bottom: var(--space-sm);
}

.eyebrow::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent);
}

.hero h1 {
  font-size: var(--text-hero);
  letter-spacing: -0.01em;
  color: var(--color-text);
}

.hero h1 em {
  font-style: normal;
  color: var(--color-accent-deep);
}

.hero p.lede {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  margin-top: var(--space-sm);
  max-width: 34ch;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-top: var(--space-md);
}

.store-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-md);
  background: var(--color-text);
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  font-size: var(--text-sm);
  transition: transform var(--duration-normal) var(--ease-out-expo),
    box-shadow var(--duration-normal) var(--ease-out-expo);
}

.store-badge.secondary {
  background: transparent;
  color: var(--color-text);
  border: 1.5px solid var(--color-line);
}

.store-badge:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 24px -12px rgba(47, 34, 51, 0.35);
}

.hero-visual {
  position: relative;
  aspect-ratio: 3 / 4;
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, var(--color-accent-soft) 0%, var(--color-lavender) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.phone-frame {
  width: 62%;
  aspect-ratio: 9 / 18;
  background: var(--color-surface);
  border-radius: 32px;
  border: 6px solid rgba(255, 255, 255, 0.6);
  box-shadow: 0 30px 60px -20px rgba(47, 34, 51, 0.45);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  padding: 1.5rem;
  text-align: center;
}

.phone-frame .ring {
  width: 84px;
  height: 84px;
  border-radius: 50%;
  border: 8px solid var(--color-accent);
  border-top-color: var(--color-accent-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 1.4rem;
  color: var(--color-accent-deep);
}

.phone-frame small {
  color: var(--color-text-muted);
  font-size: var(--text-xs);
}

/* ── Sections ────────────────────────────────────────────────────────── */

section {
  padding-block: var(--space-section);
}

.section-head {
  max-width: 42rem;
  margin-bottom: var(--space-lg);
}

.section-head .eyebrow {
  margin-bottom: var(--space-xs);
}

.section-head h2 {
  font-size: var(--text-xl);
}

.section-head p {
  color: var(--color-text-muted);
  margin-top: var(--space-xs);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

.feature-card {
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  transition: transform var(--duration-normal) var(--ease-out-expo),
    box-shadow var(--duration-normal) var(--ease-out-expo);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 40px -24px rgba(47, 34, 51, 0.3);
}

.feature-card .icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--color-surface-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-sm);
  font-size: 1.3rem;
}

.feature-card h3 {
  font-size: var(--text-base);
  font-family: var(--font-body);
  font-weight: 700;
  margin-bottom: 0.4rem;
}

.feature-card p {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  margin: 0;
}

.feature-card:nth-child(2n) .icon { background: #efe7f7; }
.feature-card:nth-child(3n) .icon { background: #fdece2; }

.privacy-band {
  background: var(--color-accent-deep);
  color: #fff8f4;
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: var(--space-md);
}

.privacy-band h2 {
  font-size: var(--text-xl);
  color: #fff;
}

.privacy-band p {
  color: rgba(255, 248, 244, 0.85);
  margin-top: 0.5rem;
  max-width: 46ch;
}

.privacy-band .store-badge {
  background: #fff;
  color: var(--color-accent-deep);
  white-space: nowrap;
}

footer {
  border-top: 1px solid var(--color-line);
  padding-block: var(--space-lg);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

footer .wrap {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-sm);
}

footer nav {
  display: flex;
  gap: var(--space-md);
}

footer a {
  color: var(--color-text-muted);
  text-decoration: none;
}

footer a:hover {
  color: var(--color-accent-deep);
}

/* ── Legal / privacy page ───────────────────────────────────────────── */

.legal-hero {
  padding-block: calc(var(--space-section) * 0.7) var(--space-lg);
}

.legal-hero h1 {
  font-size: clamp(2rem, 1.6rem + 2vw, 3.2rem);
}

.legal-hero .updated {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  margin-top: var(--space-xs);
}

.legal-body {
  padding-block: 0 var(--space-section);
}

.legal-body .wrap {
  max-width: 46rem;
}

.legal-body h2 {
  font-size: var(--text-lg);
  margin-top: var(--space-lg);
  margin-bottom: var(--space-xs);
  color: var(--color-accent-deep);
}

.legal-body h2:first-of-type {
  margin-top: 0;
}

.legal-body p, .legal-body li {
  color: var(--color-text);
}

.legal-body ul {
  padding-left: 1.2rem;
}

.legal-body li {
  margin-bottom: 0.4rem;
}

.legal-body strong {
  color: var(--color-accent-deep);
}

.placeholder {
  background: #fff3cd;
  color: #6b5100;
  padding: 0.05rem 0.4rem;
  border-radius: 4px;
  font-size: 0.9em;
}

@media (max-width: 860px) {
  .hero .wrap {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    order: -1;
    max-width: 320px;
    margin-inline: auto;
  }

  .feature-grid {
    grid-template-columns: 1fr 1fr;
  }

  .privacy-band {
    grid-template-columns: 1fr;
    text-align: left;
  }

  .nav-links {
    gap: var(--space-sm);
  }
}

@media (max-width: 560px) {
  .feature-grid {
    grid-template-columns: 1fr;
  }

  .nav-links span.nav-label {
    display: none;
  }
}