body {
  margin: 0;
  font-family: 'Segoe UI', sans-serif;
  background-color: #0c0c0f;
  color: #e0f7fa;
  text-align: center;
}
.logo {
  width: 150px;
  margin-top: 20px;
}
.tagline {
  font-size: 1.2em;
  color: #00ffff;
}
header, footer {
  padding: 20px;
}
.intro, .features, .contact {
  margin: 40px auto;
  max-width: 800px;
}
ul {
  list-style: none;
  padding: 0;
}
li {
  padding: 8px 0;
}
a {
  color: #00e6e6;
}