body {
  font-family: sans-serif;
  margin: 0;
  padding: 0;
  background-color: var(--bg);
  color: var(--text);
}
:root {
  --bg: #ffffff;
  --text: #000000;
}
[data-theme='dark'] {
  --bg: #121212;
  --text: #ffffff;
}
.navbar {
  display: flex;
  justify-content: space-between;
  padding: 1rem;
  background-color: #eee;
}
.nav-links {
  list-style: none;
  display: flex;
  gap: 1rem;
}
.nav-links a {
  text-decoration: none;
  color: inherit;
}
form {
  display: flex;
  flex-direction: column;
  max-width: 400px;
  margin: 1rem auto;
}
form input, form textarea, form button {
  margin-top: 0.5rem;
  padding: 0.5rem;
}