:root {
  color-scheme: dark;
  --background: #070b16;
  --surface: #101728;
  --surface-soft: #151e32;
  --text: #f6f7fb;
  --muted: #aab2c4;
  --accent: #9eadd2;
  --line: rgba(255, 255, 255, 0.12);
  --content: 1080px;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", system-ui, sans-serif;
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}

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

body {
  min-width: 320px;
  margin: 0;
  color: var(--text);
  background: var(--background);
  line-height: 1.65;
}

a {
  color: var(--accent);
  text-underline-offset: 0.2em;
}

a:hover {
  color: var(--text);
}

a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 5px;
  border-radius: 3px;
}

.site-header,
main,
footer {
  width: min(calc(100% - 40px), var(--content));
  margin-inline: auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 84px;
  border-bottom: 1px solid var(--line);
}

.brand {
  color: var(--text);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  text-decoration: none;
}

nav,
footer div {
  display: flex;
  gap: 22px;
}

nav a,
footer a {
  color: var(--muted);
  font-size: 0.9rem;
  text-decoration: none;
}

nav a[aria-current="page"],
footer a[aria-current="page"] {
  color: var(--text);
}

.language-link {
  margin-left: 2px;
  padding-left: 20px;
  border-left: 1px solid var(--line);
}

.hero {
  display: grid;
  grid-template-columns: minmax(220px, 0.75fr) minmax(0, 1.4fr);
  gap: clamp(36px, 7vw, 88px);
  align-items: center;
  min-height: 540px;
  padding-block: 64px;
}

.app-icon {
  width: min(100%, 300px);
  height: auto;
  border-radius: 24%;
}

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

h1 {
  margin-bottom: 24px;
  font-size: clamp(2.8rem, 5vw, 4.6rem);
  line-height: 1.08;
  letter-spacing: -0.055em;
  overflow-wrap: normal;
  text-wrap: balance;
  word-break: keep-all;
}

h2 {
  margin-bottom: 12px;
  font-size: 1.35rem;
  line-height: 1.3;
  letter-spacing: -0.03em;
}

.lede {
  max-width: 37rem;
  margin-bottom: 0;
  color: var(--muted);
  font-size: clamp(1.05rem, 2vw, 1.24rem);
  word-break: keep-all;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-bottom: 96px;
  border-block: 1px solid var(--line);
}

.feature-grid article {
  min-height: 180px;
  padding: 30px 32px;
}

.feature-grid article + article {
  border-left: 1px solid var(--line);
}

.feature-grid p,
.document-header > p,
.document section > p,
.document li {
  color: var(--muted);
}

.document {
  max-width: 760px;
  padding-block: 80px 120px;
}

.document-header {
  margin-bottom: 72px;
}

.document-header h1 {
  font-size: clamp(2.6rem, 7vw, 4.4rem);
}

.document section {
  margin-block: 44px;
}

.document hr {
  margin-block: 72px;
  border: 0;
  border-top: 1px solid var(--line);
}

.document ul {
  padding-left: 1.3rem;
}

.primary-button {
  display: inline-flex;
  margin-top: 18px;
  padding: 13px 20px;
  border-radius: 999px;
  color: #0a0e18;
  background: var(--text);
  font-weight: 700;
  text-decoration: none;
}

.primary-button:hover {
  color: #0a0e18;
  background: var(--accent);
}

.email-address {
  margin-top: 16px;
  font-size: 0.88rem;
}

.language-gate {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  min-height: 100vh;
  padding-block: 60px;
  text-align: center;
}

.language-gate .app-icon {
  width: 144px;
  margin-bottom: 36px;
}

.language-gate h1 {
  margin-bottom: 18px;
  font-size: clamp(2.4rem, 7vw, 4rem);
}

.language-options {
  display: flex;
  gap: 12px;
  margin-top: 10px;
}

.secondary-button {
  display: inline-flex;
  padding: 12px 20px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--text);
  background: var(--surface);
  font-weight: 700;
  text-decoration: none;
}

.secondary-button:hover {
  background: var(--surface-soft);
}

.note {
  margin-top: 28px;
  padding: 18px 20px;
  border-left: 3px solid var(--accent);
  background: var(--surface-soft);
}

footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 110px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.86rem;
}

@media (max-width: 720px) {
  .site-header {
    align-items: flex-start;
    padding-block: 22px;
  }

  nav {
    flex-direction: column;
    align-items: flex-end;
    gap: 7px;
  }

  .language-link {
    margin-top: 4px;
    margin-left: 0;
    padding-top: 4px;
    padding-left: 0;
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-block: 64px 72px;
  }

  .app-icon {
    width: 150px;
  }

  h1 {
    font-size: clamp(2.6rem, 12vw, 4rem);
  }

  .feature-grid {
    grid-template-columns: 1fr;
    margin-bottom: 72px;
  }

  .feature-grid article {
    min-height: auto;
    padding: 28px 0;
  }

  .feature-grid article + article {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .document {
    padding-block: 58px 88px;
  }

  footer {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    gap: 12px;
    padding-block: 28px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}