:root {
  --bg: #f9f9f9;
  --text: #222;
  --accent: #007bff;
}

[data-theme='dark'] {
  --bg: #121212;
  --text: #f1f1f1;
  --accent: #0d6efd;
}

body {
  font-family: 'Poppins', sans-serif;
  background-color: var(--bg);
  color: var(--text);
  transition: background-color 0.3s, color 0.3s;
}

.navbar {
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

section {
  padding: 4rem 0;
}

.card {
  transition: transform 0.3s;
}

.card:hover {
  transform: translateY(-5px);
}

.btn-primary {
  background-color: var(--accent);
  border-color: var(--accent);
}

.btn-primary:hover {
  background-color: #0056b3;
  border-color: #0056b3;
}

#theme-toggle {
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}

footer a {
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}