* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: #0f1115;
  color: #e8e8e8;
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.6;
}

header,
main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 40px 24px;
}

header {
  padding-top: 80px;
  padding-bottom: 80px;
}

h1 {
  font-size: 3.5rem;
  margin: 0;
}

.subtitle {
  color: #aaa;
  font-size: 1.2rem;
}

nav {
  margin-top: 25px;
}

nav a {
  color: #9ecbff;
  text-decoration: none;
  margin-right: 24px;
}

nav a:hover {
  text-decoration: underline;
}

h2 {
  font-size: 2.2rem;
}

h3 {
  font-size: 1.6rem;
}

article {
  margin: 70px 0;
}

img {
  width: 100%;
  max-width: 900px;
  display: block;
  margin: 20px 0;
  border-radius: 12px;
}

p {
  max-width: 800px;
}