body {
  background: #0a0a0a;
  color: #fff;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  margin: 0;
  line-height: 1.6;
}
header.hero, .cta-banner, footer {
  text-align: center;
  padding: 3rem 1rem;
}
.logo, .logo-footer {
  width: 180px;
  margin-bottom: 1rem;
}
h1, h2 {
  color: #00f0ff;
}
.intro, .como-funciona {
  max-width: 800px;
  margin: 2rem auto;
  padding: 0 1rem;
  text-align: center;
}
.intro img, .como-funciona img, .cta-banner img {
  width: 100%;
  max-width: 600px;
  margin-top: 1rem;
}
.cta {
  display: inline-block;
  background: #00f0ff;
  color: #0a0a0a;
  padding: 0.8rem 2rem;
  margin-top: 1.5rem;
  text-decoration: none;
  font-weight: bold;
  border-radius: 50px;
  transition: background 0.3s;
}
.cta:hover {
  background: #02cddb;
}