body {
  margin: 0;
  font-family: "Segoe UI", Arial, sans-serif;
  background: #0b1120;
  color: #e5e7eb;
}

header {
  background: #020617;
  padding: 18px 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

header h1 {
  margin: 0;
  font-size: 1.4rem;
  letter-spacing: 1px;
}

nav a {
  color: #e5e7eb;
  margin-left: 24px;
  text-decoration: none;
  font-weight: 600;
}

nav a:hover {
  color: #22c55e;
}

section {
  padding: 90px 20px;
  text-align: center;
}

section h2 {
  font-size: 2.4rem;
  margin-bottom: 20px;
}

section p {
  max-width: 800px;
  margin: auto;
  font-size: 1.1rem;
  opacity: 0.9;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 25px;
  margin-top: 50px;
}

.card {
  background: #020617;
  padding: 30px;
  border-radius: 10px;
}

footer {
  background: #020617;
  padding: 25px;
  text-align: center;
  opacity: 0.7;
}

/* WhatsApp Button */
.whatsapp {
  position: fixed;
  right: 20px;
  bottom: 20px;
  background: #22c55e;
  color: #022c22;
  padding: 14px 20px;
  border-radius: 50px;
  font-weight: bold;
  text-decoration: none;
  box-shadow: 0 8px 20px rgba(0,0,0,0.4);
}