:root {
  --bg: #FFFFFF;
  --fg: #0F172A;
  --accent: #3DCEC1;
  --muted: #6B7280;
  --card: #E1F7F5;
  --cta-fg: #0F172A;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: var(--fg);
  background: var(--bg);
  line-height: 1.55;
}
header, footer { padding: 1.5rem 2rem; }
header { display: flex; align-items: center; justify-content: space-between; }
header a { color: var(--fg); text-decoration: none; margin-left: 1rem; }
.hero {
  padding: 4rem 2rem;
  text-align: center;
  background: linear-gradient(160deg, var(--card), var(--bg));
}
.hero h1 { font-size: 3rem; margin: 0 0 1rem; }
.hero p { font-size: 1.25rem; color: var(--muted); max-width: 40rem; margin: 0 auto 2rem; }
.cta {
  display: inline-block; padding: 0.85rem 1.5rem;
  background: var(--accent); color: var(--cta-fg); border-radius: 999px;
  text-decoration: none; font-weight: 600;
}
a { color: var(--accent); }
a:hover { text-decoration: underline; }
header a { color: var(--fg); text-decoration: none; }
h1, h2, h3 { color: var(--fg); }
.screens {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem; padding: 2rem; max-width: 60rem; margin: auto;
}
.screens img { width: 100%; border-radius: 1rem; box-shadow: 0 8px 30px rgba(0,0,0,.15); }
main.page { max-width: 42rem; margin: 0 auto; padding: 3rem 2rem; }
footer { color: var(--muted); text-align: center; font-size: 0.9rem; }