body {
  background-color: #121212;
  color: silver;
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
}
header {
  background: #1f1f1f;
  padding: 1em;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
nav ul {
  list-style-type: none;
  display: flex;
  gap: 1em;
}
nav ul li a {
  color: silver;
  text-decoration: none;
}
.logo {
  height: 50px;
}
footer {
  background: #1f1f1f;
  text-align: center;
  padding: 1em;
  margin-top: 2em;
}