*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg: #FFFFFF;
  --bg-soft: #F7F8FA;
  --bg-muted: #F0F2F5;
  --text-primary: #111318;
  --text-secondary: #6B7280;
  --text-muted: #9CA3AF;
  --accent: #2563EB;
  --accent-hover: #1D4ED8;
  --border: #E5E7EB;
  --border-soft: #F3F4F6;
  --font: "Inter", -apple-system, BlinkMacSystemFont, "SF Pro Text", sans-serif;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg);
  color: var(--text-primary);
  font-family: var(--font);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

/* ── Nav ── */

.topnav {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}

.topnav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
  gap: 16px;
}

.site-name a {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.nav-anchors {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 2px;
}

.nav-anchors li a {
  display: inline-flex;
  align-items: center;
  height: 34px;
  padding: 0 12px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: 8px;
  transition: color 0.12s, background-color 0.12s;
  white-space: nowrap;
}

.nav-anchors li a:hover {
  color: var(--text-primary);
  background-color: var(--bg-muted);
}

/* ── Layout ── */

.container {
  width: 100%;
  max-width: 640px;
  margin: 0 auto;
  padding: 0 20px;
}

main {
  flex: 1;
}

/* ── Sections ── */

.section-block {
  padding: 64px 0;
  border-bottom: 1px solid var(--border);
}

.section-block:last-child {
  border-bottom: none;
  padding-bottom: 80px;
}

/* ── Hero ── */

.section-hero {
  padding-top: 80px;
  padding-bottom: 72px;
  background: linear-gradient(180deg, var(--bg-soft) 0%, var(--bg) 100%);
  border-bottom: 1px solid var(--border);
}

.eyebrow {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 20px;
}

.hero-headline {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.2;
  letter-spacing: -0.035em;
  margin-bottom: 18px;
}

.hero-sub {
  font-size: 1.0625rem;
  color: var(--text-primary);
  line-height: 1.65;
  max-width: 480px;
}

/* ── Section labels ── */

.section-label {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  text-transform: none;
  color: var(--text-primary);
  margin-bottom: 20px;
}

.section-meta {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 28px;
  margin-top: -8px;
}

/* ── Body text ── */

p {
  font-size: 0.9375rem;
  color: var(--text-primary);
  line-height: 1.7;
  margin-bottom: 16px;
}

p:last-child {
  margin-bottom: 0;
}

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

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

/* ── Apps grid ── */

.app-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.app-card {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.app-mockup img {
  display: block;
  height: 380px;
  width: auto;
}

.app-card-info {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.app-name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.app-tagline {
  font-size: 0.875rem;
  color: var(--text-primary);
  margin-bottom: 12px;
  line-height: 1.4;
}

.app-store-badge {
  display: inline-flex;
  align-self: flex-start;
}

.app-store-badge img {
  display: block;
  height: 34px;
  width: auto;
}

@media (max-width: 420px) {
  .app-grid {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }
}

/* ── Prose (privacy) ── */

.prose {
  margin-top: 8px;
}

.prose h2 {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-top: 36px;
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.prose p {
  margin-bottom: 12px;
}

.prose ul {
  padding-left: 20px;
  margin-bottom: 12px;
}

.prose li {
  font-size: 0.9375rem;
  color: var(--text-primary);
  line-height: 1.65;
  margin-bottom: 6px;
}

/* ── Support ── */

.email-display {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.secondary-note {
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

/* ── Footer ── */

footer {
  background-color: var(--bg-soft);
  border-top: 1px solid var(--border);
  padding: 28px 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}

.footer-copy {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: 16px;
}

.footer-links a {
  font-size: 0.8125rem;
  color: var(--text-muted);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--text-secondary);
  text-decoration: none;
}

/* ── Responsive ── */

@media (min-width: 480px) {
  .hero-headline {
    font-size: 2.75rem;
  }

  .section-hero {
    padding-top: 104px;
    padding-bottom: 96px;
  }
}