body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  margin: 0;
  padding: 0;
  background-color: #f4f4f9;
  color: #333;
}

header {
  background-color: #0a192f;
  padding: 1em 0;
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 1em;
}

.logo {
  color: #fff;
  font-size: 1.5em;
  font-weight: bold;
  text-decoration: none;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 1em;
}

nav ul li a {
  color: #fff;
  text-decoration: none;
  font-weight: 500;
}

.header {
  text-align: center;
  font-size: 2em;
  margin-top: 1em;
}

.center {
  text-align: center;
  margin: 0.5em auto;
}

.legend {
  color: yellow;
  text-shadow: 1px 1px 2px black;
  font-weight: bold;
}

hr {
  margin: 2em auto;
  width: 80%;
  border: 1px solid #ccc;
}

footer {
  text-align: center;
  padding: 1em;
  background-color: #0a192f;
  color: #fff;
}

footer a {
  color: #90cdf4;
  text-decoration: none;
  margin-left: 10px;
}