:root {
  color-scheme: light dark;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background-color: #f5f5f5;
  color: #1f1f1f;
}

.navbar {
  display: flex;
  gap: 12px;
  padding: 12px 16px;
  background-color: #333;
}

.nav-link {
  flex: 1;
  display: block;
  text-align: center;
  color: #fff;
  padding: 12px;
  border-radius: 6px;
  text-decoration: none;
  transition: background-color 0.2s ease-in-out;
}

.nav-link:hover,
.nav-link:focus-visible {
  background-color: #555;
}

.nav-link.active {
  background-color: #444;
}

.main-content {
  max-width: 1000px;
  margin: 24px auto 40px;
  padding: 0 16px;
}