body {
  background: #ffffff;
  color: #111;
}

.topnav {
  border-bottom: 1px solid #ddd;
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.topnav nav a {
  margin-left: 1.5rem;
}

.mag-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 2rem;
}

.post-card {
  border: 1px solid #ddd;
  padding: 1.5rem;
}

/* Auto dark mode */
@media (prefers-color-scheme: dark) {
  body {
    background: #111;
    color: #eee;
  }

  .topnav {
    border-color: #333;
  }
  
    .intro-box {
    background: #161616;
    border-color: #333;
  }

  .post-card {
    border-color: #333;
  }

  a {
    color: #8ab4ff;
  }
}