body {
  font-family: 'Helvetica', sans-serif;
  max-width: 700px;
  margin: 40px auto;
  line-height: 1.6;
  background-color: #15202b; 
  color: #ffffff;
}

header h1 {
  color: #ff6600; 
}

a {
  color: #ff6600;
  text-decoration: none;
}

h2 {
  margin-top: 2rem;
  border-bottom: 2px solid #eee;
  padding-bottom: 0.3rem;
}

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

li {
  margin-bottom: 0.5rem;
}

header, section {
  padding: 10px 0;
}

.spaced {
    margin-top: 100px;
}