:root {
  --bg: #ffffff;
  --surface: #f5f5f7;
  --text: #1d1d1f;
  --muted: #6e6e73;
  --accent: #007aff;
  --border: rgba(0, 0, 0, 0.08);
  --maxw: 920px;
  --radius: 18px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --surface: #1c1c1e;
    --text: #f5f5f7;
    --muted: #a1a1a6;
    --accent: #0a84ff;
    --border: rgba(255, 255, 255, 0.14);
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

/* Nav */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 20px 24px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 18px;
  color: var(--text);
}
.brand:hover { text-decoration: none; }
.brand img { width: 30px; height: 30px; border-radius: 8px; }
.nav-links a { margin-left: 22px; color: var(--text); font-size: 15px; }
.nav-links a:hover { color: var(--accent); text-decoration: none; }

/* Hero */
.hero {
  text-align: center;
  padding: 48px 24px 16px;
  max-width: 760px;
  margin: 0 auto;
}
.hero .icon {
  width: 96px;
  height: 96px;
  border-radius: 22px;
  display: block;
  margin: 0 auto 24px;
}
.hero h1 {
  font-size: 44px;
  line-height: 1.1;
  letter-spacing: -0.02em;
  font-weight: 600;
  margin: 0 0 16px;
}
.hero .lede {
  font-size: 20px;
  color: var(--muted);
  max-width: 620px;
  margin: 0 auto 28px;
}
.btn {
  display: inline-block;
  background: var(--text);
  color: var(--bg);
  padding: 14px 26px;
  border-radius: 980px;
  font-weight: 600;
  font-size: 16px;
}
.btn:hover { opacity: 0.85; text-decoration: none; }

/* Screenshots */
.shots {
  display: flex;
  gap: 28px;
  justify-content: center;
  flex-wrap: wrap;
  padding: 40px 24px;
}
.shots img {
  width: 260px;
  max-width: 70vw;
  border-radius: 34px;
  border: 1px solid var(--border);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.18);
}

/* Features */
.features { max-width: 740px; margin: 0 auto; padding: 24px 24px 8px; }
.feature { padding: 22px 0; border-top: 1px solid var(--border); }
.feature:first-child { border-top: none; }
.feature h3 { font-size: 20px; font-weight: 600; margin: 0 0 6px; }
.feature p { margin: 0; color: var(--muted); font-size: 16px; }

/* Callout */
.callout {
  max-width: 740px;
  margin: 24px auto;
  padding: 24px;
  background: var(--surface);
  border-radius: var(--radius);
}
.callout h3 { margin: 0 0 8px; font-size: 18px; font-weight: 600; }
.callout p { margin: 0 0 10px; color: var(--muted); font-size: 15px; }
.callout p:last-child { margin-bottom: 0; }

/* Document (privacy) */
.doc { max-width: 740px; margin: 0 auto; padding: 16px 24px 24px; }
.doc h1 { font-size: 34px; margin: 24px 0 4px; }
.doc .updated { color: var(--muted); font-size: 14px; margin: 0 0 24px; }
.doc h2 { font-size: 20px; font-weight: 600; margin: 28px 0 8px; }
.doc p, .doc li { font-size: 16px; }
.doc ul { padding-left: 20px; }

/* Footer */
.footer {
  border-top: 1px solid var(--border);
  margin-top: 48px;
  padding: 28px 24px;
  text-align: center;
  color: var(--muted);
  font-size: 14px;
}
.footer a { color: var(--muted); margin: 0 8px; }
.footer .copy { display: block; margin-top: 10px; }