html, body { margin:0; padding:0; font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif; }
.hero {
  min-height: 100vh;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 24px;
}
.card {
  max-width: 720px;
  width: 100%;
  border: 1px solid rgba(0,0,0,0.08);
  border-radius: 16px;
  padding: 32px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.06);
}
.logo {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
}
h1 { font-size: clamp(28px, 6vw, 40px); margin: 12px 0; }
p { color: #333; line-height: 1.6; font-size: 16px; }
.cta {
  margin-top: 20px;
  display: inline-block;
  padding: 12px 18px;
  border-radius: 10px;
  border: 1px solid rgba(0,0,0,0.1);
  text-decoration: none;
}
.footer {
  margin-top: 24px;
  font-size: 14px;
  color: #555;
}