:root {
  color-scheme: light;
  --bg: #f7f8f8;
  --paper: #ffffff;
  --ink: #151719;
  --muted: #606970;
  --line: #dfe5e4;
  --line-strong: #c8d2d0;
  --teal: #0d9488;
  --teal-deep: #0f766e;
  --record: #e23d3d;
  --shadow: 0 18px 48px rgba(16, 24, 32, 0.08);
  --radius: 8px;
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px clamp(20px, 5vw, 64px);
  background: rgba(247, 248, 248, 0.88);
  border-bottom: 1px solid rgba(223, 229, 228, 0.86);
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-size: 16px;
  font-weight: 750;
  letter-spacing: 0;
  text-decoration: none;
}

.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  box-shadow: 0 8px 20px rgba(16, 24, 32, 0.12);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(14px, 3vw, 28px);
  color: var(--muted);
  font-size: 14px;
  font-weight: 650;
}

.site-nav a {
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--ink);
}

.language-switcher {
  position: relative;
  color: var(--muted);
  font-size: 14px;
  font-weight: 650;
}

.language-switcher summary {
  cursor: pointer;
  list-style: none;
}

.language-switcher summary::-webkit-details-marker {
  display: none;
}

.language-switcher summary::after {
  content: "▾";
  margin-inline-start: 6px;
  font-size: 11px;
}

.language-menu {
  position: absolute;
  inset-block-start: calc(100% + 12px);
  inset-inline-end: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(110px, 1fr));
  gap: 4px;
  min-width: 260px;
  max-height: min(420px, calc(100vh - 96px));
  padding: 10px;
  overflow: auto;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.language-menu a {
  padding: 8px 10px;
  border-radius: 6px;
  color: var(--ink);
  text-decoration: none;
}

.language-menu a:hover,
.language-menu a:focus-visible,
.language-menu a[aria-current="page"] {
  background: var(--bg);
}

.section-shell {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(300px, 0.72fr);
  gap: clamp(32px, 6vw, 76px);
  align-items: center;
  min-height: 560px;
  padding: clamp(56px, 9vw, 112px) 0 clamp(42px, 7vw, 72px);
}

.hero h1 {
  max-width: 720px;
  margin: 0;
  font-size: clamp(48px, 8vw, 92px);
  font-weight: 780;
  line-height: 0.98;
  letter-spacing: 0;
}

.hero p {
  max-width: 650px;
  margin: 26px 0 0;
  color: var(--muted);
  font-size: clamp(18px, 2.3vw, 23px);
  line-height: 1.45;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border: 1px solid transparent;
  border-radius: 7px;
  font-size: 14px;
  font-weight: 720;
  text-decoration: none;
}

.button.primary {
  background: var(--ink);
  color: #fff;
}

.button.secondary {
  background: var(--paper);
  border-color: var(--line);
  color: var(--ink);
}

.support-card {
  padding: 28px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.app-icon-preview {
  display: block;
  width: min(100%, 256px);
  height: auto;
  margin-bottom: 28px;
  margin-inline: auto;
  border-radius: 22%;
  box-shadow: 0 18px 42px rgba(16, 24, 32, 0.2);
}

dl {
  display: grid;
  gap: 18px;
  margin: 0;
}

dt {
  color: var(--muted);
  font-size: 12px;
  font-weight: 760;
  text-transform: uppercase;
}

dd {
  margin: 4px 0 0;
  font-size: 16px;
  font-weight: 650;
}

.content-section {
  padding: clamp(54px, 8vw, 86px) 0;
  border-top: 1px solid var(--line);
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(220px, 0.42fr) minmax(0, 0.58fr);
  gap: clamp(20px, 6vw, 72px);
  align-items: start;
  margin-bottom: 32px;
}

.section-heading h2 {
  margin: 0;
  font-size: clamp(30px, 4.6vw, 52px);
  font-weight: 760;
  line-height: 1.05;
  letter-spacing: 0;
}

.section-heading p {
  margin: 0;
  color: var(--muted);
  font-size: 17px;
}

.faq-list,
.policy-layout,
.terms-list {
  display: grid;
  gap: 14px;
}

.info-row,
.policy-block,
.terms-list article {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.info-row {
  display: grid;
  grid-template-columns: minmax(220px, 0.35fr) minmax(0, 0.65fr);
  gap: 24px;
  padding: 22px 24px;
}

.info-row h3,
.policy-block h3,
.terms-list h3 {
  margin: 0;
  font-size: 18px;
  line-height: 1.25;
}

.info-row p,
.policy-block p,
.terms-list p {
  margin: 0;
  color: var(--muted);
}

.policy-layout {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.policy-block,
.terms-list article {
  padding: 24px;
}

.policy-block h3,
.terms-list h3 {
  margin-bottom: 10px;
}

.terms-list {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding: 32px 0 44px;
  color: var(--muted);
  border-top: 1px solid var(--line);
  font-size: 14px;
}

.site-footer p {
  margin: 0;
}

.language-landing {
  display: grid;
  align-content: center;
  min-height: 100vh;
  padding: clamp(48px, 8vw, 96px) 0;
}

.landing-mark {
  width: 52px;
  height: 52px;
  margin-bottom: 24px;
}

.language-landing h1 {
  max-width: 680px;
  margin: 0;
  font-size: clamp(42px, 7vw, 76px);
  line-height: 1;
  letter-spacing: 0;
}

.language-landing p {
  max-width: 620px;
  margin: 20px 0 0;
  color: var(--muted);
  font-size: 18px;
}

.language-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px;
  margin-top: 34px;
}

.language-card {
  padding: 14px 16px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--ink);
  font-weight: 700;
  text-align: center;
  text-decoration: none;
}

.language-card:hover,
.language-card:focus-visible {
  border-color: var(--line-strong);
  box-shadow: 0 10px 24px rgba(16, 24, 32, 0.08);
}

@media (max-width: 820px) {
  .site-header {
    position: static;
    align-items: flex-start;
    flex-direction: column;
    padding: 18px 20px;
  }

  .site-nav {
    width: 100%;
    justify-content: space-between;
    gap: 12px;
    font-size: 13px;
  }

  .language-switcher {
    width: 100%;
  }

  .language-menu {
    position: static;
    margin-top: 10px;
    min-width: 0;
    max-height: none;
  }

  .hero,
  .section-heading,
  .info-row,
  .policy-layout,
  .terms-list {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 56px;
  }

  .support-card {
    padding: 20px;
  }

  .terms-list,
  .policy-layout {
    gap: 12px;
  }

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

@media (max-width: 480px) {
  .section-shell,
  .site-footer {
    width: min(100% - 28px, 1120px);
  }

  .site-nav {
    flex-wrap: wrap;
    justify-content: flex-start;
  }

  .hero-actions {
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .info-row,
  .policy-block,
  .terms-list article {
    padding: 18px;
  }
}