/* Theme variables */
:root {
  --bg: #f9f9f9;
  --text: #222;
  --card: #ffffff;
  --accent: #6aa8ff;
  --link: #2563eb;
}

body.dark {
  --bg: #121212;
  --text: #eaeaea;
  --card: #1e1e1e;
  --accent: #0f3c78;
}

body {
  font-family: 'Inter', sans-serif;
  margin: 0;
  background: var(--bg);
  color: var(--text);
}

a {
  color: var(--link);
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
  align-items: center;
  background: var(--accent);
  padding: 1rem;
}

nav a {
  color: white;
  text-decoration: none;
  font-weight: 600;
}

#theme-toggle {
  background: none;
  border: none;
  color: white;
  font-size: 1.2rem;
  cursor: pointer;
}

.hero {
  text-align: center;
  padding: 3rem;
  background: #9fc5e8;
}

.card-section {
  background: var(--card);
  margin: 2rem auto;
  padding: 2rem;
  width: 90%;
  max-width: 900px;
  border-radius: 8px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1rem;
}

.card {
  padding: 1rem;
  border-radius: 6px;
  background: var(--card);
  box-shadow: 0 1px 4px rgba(0,0,0,0.1);
}

footer {
  text-align: center;
  padding: 1rem;
  background: var(--accent);
  color: white;
}

/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: none;
}