body {
  font-family: 'Segoe UI', sans-serif;
  margin: 0;
  padding: 0;
  background: #f9f9f9;
  color: #333;
  transition: background 0.3s, color 0.3s;
}

header {
  background: #222;
  color: white;
  padding: 2em;
  text-align: center;
}

nav ul {
  display: flex;
  justify-content: center;
  list-style: none;
  background: #444;
  padding: 1em;
  margin: 0;
  flex-wrap: wrap;
}

nav a {
  color: white;
  text-decoration: none;
  margin: 0 1em;
}

section {
  padding: 2em;
  text-align: center;
}

section img {
  max-width: 250px;
  border-radius: 10px;
  margin: 1em 0;
}

.project-card {
  background: #eee;
  margin: 1em auto;
  padding: 1em;
  width: 250px;
  cursor: pointer;
  transition: transform 0.3s;
}

.project-card:hover {
  transform: scale(1.05);
}

/* Dark Mode */
body.dark-mode {
  background-color: #121212;
  color: #f0f0f0;
}

.project-card.dark-mode {
  background-color: #333;
  color: #fff;
}

header.dark-mode,
nav.dark-mode,
footer.dark-mode {
  background-color: #000;
}

nav.dark-mode a {
  color: #f0f0f0;
}