:root {
  color-scheme: light dark;
  --blue: #087cf0;
  --blue-strong: #0069dc;
  --text: #101114;
  --secondary: #65676d;
  --surface: rgba(255, 255, 255, 0.78);
  --border: rgba(20, 25, 35, 0.10);
  --background: #f7f9fc;
}

* { box-sizing: border-box; }

html { font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", sans-serif; }

body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 50% -10%, rgba(70, 169, 255, 0.18), transparent 36rem),
    var(--background);
  line-height: 1.55;
}

a { color: var(--blue); text-underline-offset: 0.18em; }

.site-header,
footer {
  width: min(100% - 40px, 920px);
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-header { min-height: 76px; }

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-size: 1.08rem;
  font-weight: 700;
  text-decoration: none;
}

.brand img,
.app-icon { border-radius: 22.5%; }

nav,
.footer-links { display: flex; gap: 22px; }

nav a,
footer a { color: var(--secondary); font-weight: 600; text-decoration: none; }
nav a[aria-current="page"] { color: var(--text); }

.hero {
  width: min(100% - 40px, 780px);
  min-height: calc(100vh - 156px);
  margin-inline: auto;
  padding: clamp(70px, 13vh, 140px) 0 100px;
  text-align: center;
}

.app-icon { box-shadow: 0 20px 52px rgba(0, 105, 220, 0.22); }

.eyebrow {
  margin: 24px 0 10px;
  color: var(--blue);
  font-size: 0.85rem;
  font-weight: 750;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(2.25rem, 7vw, 4.65rem);
  line-height: 1.04;
  letter-spacing: -0.045em;
}

.lede {
  max-width: 650px;
  margin: 24px auto 0;
  color: var(--secondary);
  font-size: clamp(1.05rem, 2.5vw, 1.28rem);
}

.actions { display: flex; justify-content: center; gap: 12px; margin-top: 34px; }

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 0 22px;
  border-radius: 999px;
  font-weight: 700;
  text-decoration: none;
}

.button.primary { color: white; background: var(--blue); }
.button.primary:hover { background: var(--blue-strong); }
.button.secondary { color: var(--text); background: var(--surface); border: 1px solid var(--border); }

.document {
  width: min(100% - 40px, 720px);
  margin: 58px auto 110px;
}

.document h1 { font-size: clamp(2.35rem, 8vw, 4rem); }
.document h2 { margin: 40px 0 8px; font-size: 1.28rem; letter-spacing: -0.018em; }
.document p { color: var(--secondary); }
.document .updated { margin-top: 10px; font-size: 0.92rem; }
.document .eyebrow { margin-bottom: 12px; }
.support .lede { margin-inline: 0; }
.email-button { margin-top: 28px; }
.faq { margin-top: 60px; }
.faq section { padding: 1px 0 24px; border-bottom: 1px solid var(--border); }
.contact-note { margin-top: 40px; padding: 18px 20px; border-radius: 18px; background: var(--surface); border: 1px solid var(--border); }

footer {
  min-height: 80px;
  border-top: 1px solid var(--border);
  color: var(--secondary);
  font-size: 0.88rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --text: #f5f6f8;
    --secondary: #aaadb4;
    --surface: rgba(36, 39, 45, 0.78);
    --border: rgba(255, 255, 255, 0.11);
    --background: #0d0f13;
  }
}

@media (max-width: 540px) {
  .site-header,
  footer { width: min(100% - 28px, 920px); }
  nav { gap: 14px; }
  .hero,
  .document { width: min(100% - 32px, 720px); }
  .actions { flex-direction: column; }
  footer { align-items: flex-start; flex-direction: column; justify-content: center; gap: 8px; }
}

@media (prefers-reduced-motion: no-preference) {
  .button { transition: background-color 160ms ease, transform 160ms ease; }
  .button:hover { transform: translateY(-1px); }
}