:root {
  --paper: #f7f4ee;
  --paper-raised: #fffdf8;
  --ink: #1c1a17;
  --ink-soft: #625c52;
  --zhu: #9f312a;
  --line: rgba(28, 26, 23, 0.14);
  --shadow: 0 24px 70px rgba(43, 34, 26, 0.09);
  --serif: "Songti SC", "STSong", "Source Han Serif SC", "Noto Serif CJK SC", Georgia, serif;
  color-scheme: light dark;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  background: var(--paper);
}

body {
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(circle at 50% 12%, rgba(159, 49, 42, 0.07), transparent 30rem),
    var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
}

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 10;
  padding: 8px 12px;
  border-radius: 8px;
  background: var(--ink);
  color: var(--paper);
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  width: min(1080px, calc(100% - 40px));
  margin: 0 auto;
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
}

.brand img {
  display: block;
  width: 100px;
  height: 34px;
  object-fit: contain;
}

.brand .logo-dark {
  display: none;
}

.language-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 253, 248, 0.72);
}

.language-nav a {
  min-width: 36px;
  padding: 4px 9px;
  border-radius: 999px;
  color: var(--ink-soft);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 12px;
  line-height: 1.5;
  text-align: center;
  text-decoration: none;
}

.language-nav a[aria-current="page"] {
  background: var(--ink);
  color: var(--paper);
}

.language-nav a:focus-visible,
.store-link:focus-visible,
.brand:focus-visible {
  outline: 3px solid rgba(159, 49, 42, 0.35);
  outline-offset: 3px;
}

.download-main {
  width: min(880px, calc(100% - 40px));
  margin: 0 auto;
  padding: 72px 0 84px;
  text-align: center;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--zhu);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 13px;
  font-weight: 650;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(36px, 6vw, 60px);
  font-weight: 600;
  letter-spacing: 0.02em;
  line-height: 1.16;
}

.slogan {
  max-width: 48rem;
  margin: 18px auto 0;
  color: var(--ink);
  font-size: clamp(17px, 2.3vw, 23px);
  font-weight: 550;
  line-height: 1.5;
}

.value {
  max-width: 42rem;
  margin: 22px auto 0;
  color: var(--ink-soft);
  font-size: 17px;
}

.boundary {
  max-width: 38rem;
  margin: 12px auto 0;
  color: var(--ink-soft);
  font-size: 14px;
}

.download-card {
  width: min(520px, 100%);
  margin: 44px auto 0;
  padding: 34px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: rgba(255, 253, 248, 0.9);
  box-shadow: var(--shadow);
}

.download-card h2 {
  margin: 0;
  font-size: 23px;
  font-weight: 600;
  line-height: 1.35;
}

.download-card p {
  max-width: 34rem;
  margin: 10px auto 0;
  color: var(--ink-soft);
  font-size: 15px;
}

.qr-image {
  display: block;
  width: 252px;
  height: 252px;
  margin: 24px auto 20px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fff;
  image-rendering: pixelated;
}

.store-link {
  display: inline-flex;
  margin-top: 20px;
  border-radius: 10px;
  text-decoration: none;
}

.store-badge {
  display: block;
  width: 180px;
  height: auto;
}

.mobile-download {
  display: none;
}

.privacy-note {
  margin-top: 22px !important;
  font-size: 13px !important;
}

footer {
  padding: 28px 20px 44px;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 12px;
  text-align: center;
}

@media (max-width: 699px) {
  .site-header {
    width: min(100% - 28px, 1080px);
    padding-top: 14px;
  }

  .language-nav a {
    min-width: 32px;
    padding-inline: 7px;
  }

  .download-main {
    width: min(100% - 32px, 880px);
    padding: 44px 0 64px;
  }

  h1 {
    font-size: clamp(33px, 11vw, 46px);
  }

  .value {
    font-size: 16px;
  }

  .download-card {
    margin-top: 34px;
    padding: 30px 22px;
    border-radius: 20px;
  }

  .desktop-download {
    display: none;
  }

  .mobile-download {
    display: block;
  }

  .store-badge {
    width: 200px;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #171512;
    --paper-raised: #211e19;
    --ink: #f3ede3;
    --ink-soft: #bcb3a7;
    --zhu: #e27a70;
    --line: rgba(243, 237, 227, 0.14);
    --shadow: 0 24px 70px rgba(0, 0, 0, 0.25);
  }

  .brand .logo-light {
    display: none;
  }

  .brand .logo-dark {
    display: block;
  }

  .language-nav,
  .download-card {
    background: rgba(33, 30, 25, 0.9);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
  }
}