* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: Arial, sans-serif;
}

body {
  background: #081018;
  color: #e6f1ff;
}

/* NAV */
.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 60px;
  background: #0b1622;
}

.logo {
  color: #32ff9c;
  font-weight: bold;
}

.nav ul {
  list-style: none;
  display: flex;
  gap: 25px;
}

.nav a {
  text-decoration: none;
  color: #c9d1d9;
}

.nav a.active,
.nav a:hover {
  color: #32ff9c;
}

/* ABOUT */
.about {
  text-align: center;
  margin-top: 80px;
  padding: 20px;
}

.about h1 {
  font-size: 48px;
  color: #32ff9c;
}

.intro {
  max-width: 700px;
  margin: 20px auto;
  opacity: 0.85;
}

/* CARDS */
.cards {
  width: min(900px, 95%);
  margin: 40px auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.card {
  background: #111c2b;
  padding: 20px;
  border-radius: 14px;
  border: 1px solid rgba(50,255,156,0.25);
  transition: 0.25s;
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: 0 0 20px rgba(50,255,156,0.3);
}

.card h3 {
  color: #32ff9c;
  margin-bottom: 10px;
}

.card ul {
  list-style: none;
}

.card li {
  margin: 6px 0;
  opacity: 0.9;
}

/* MOBILE */
@media (max-width: 700px) {
  .cards {
    grid-template-columns: 1fr;
  }
}