.body {
  background-color: #151719;
  color: white;
}
.header {
  max-width: 1440px;
  border: 1px solid white;
  border-radius: 10px;
  padding: 25px;
  margin: 0 auto 20px;
}
.header h1 {
  color: white;
}
.nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
}
.nav ul li + li {
  margin-left: 20px;
}
.main {
  max-width: 1440px;
  border: 1px solid white;
  border-radius: 10px;
  padding: 25px;
  margin: 0 auto;
}
.portfolio {
  border: 1px solid white;
  border-radius: 10px;
  padding: 15px 25px;
}
.portfolio h2 {
  margin-top: 0;
}
.portfolio ul {
  margin: 0;
  padding: 0;
  list-style: none;
}
.portfolio__card {
  border: 1px solid white;
  border-radius: 10px;
  padding: 25px;
}
.portfolio__card h3 {
  margin-top: 0;
}
.portfolio__card + .portfolio__card {
  margin-top: 20px;
}