body {
  font-family: "Helvetica Neue", Arial, sans-serif;
  background: #ffffff;
  color: #222;
  margin: 0;
  padding: 0;
  line-height: 1.6;
}

header {
  text-align: center;
  padding: 3rem 1rem;
  background: #f9f9f9;
  border-bottom: 1px solid #eee;
}

header h1 {
  font-size: 2.5rem;
  color: #222;
}

.intro {
  font-size: 1.2rem;
  color: #555;
  max-width: 700px;
  margin: 1rem auto;
}

main {
  padding: 2rem 1rem;
  max-width: 800px;
  margin: auto;
}

.teasing h2,
.seo h2 {
  font-size: 1.8rem;
  margin-top: 2rem;
  color: #333;
}

ul {
  list-style: none;
  padding: 0;
}

ul li::before {
  content: "✔️ ";
  color: #ff5722;
}

.mystere {
  font-style: italic;
  margin: 1.5rem 0;
  text-align: center;
}

.cta {
  text-align: center;
  margin: 2rem 0;
}

.btn {
  background: #ff5722;
  color: #fff;
  padding: 0.9rem 2rem;
  font-size: 1.2rem;
  border-radius: 6px;
  text-decoration: none;
  transition: 0.3s;
}

.btn:hover {
  background: #e64a19;
}

footer {
  text-align: center;
  padding: 1.5rem;
  background: #f9f9f9;
  border-top: 1px solid #eee;
  font-size: 0.9rem;
  color: #666;
}