* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: Arial, Helvetica, sans-serif;
  background: #f8fafc;
  color: #1e293b;
  line-height: 1.6;
}

header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid #e2e8f0;
}

.navbar {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo img {
  height: 58px;
}

.nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  color: #0b2d3b;
  font-weight: 600;
  transition: 0.25s;
}

.nav-links a:hover {
  opacity: 0.7;
}

.hero {
  max-width: 900px;
  margin: 0 auto;
  padding: 120px 24px;
  text-align: center;
}

.hero h1 {
  font-size: 3rem;
  color: #0b2d3b;
  margin-bottom: 20px;
}

.hero p {
  font-size: 1.1rem;
  color: #475569;
  margin-bottom: 30px;
}

.btn-primary {
  display: inline-block;
  background: #0b2d3b;
  color: white;
  padding: 14px 24px;
  border-radius: 12px;
  text-decoration: none;
  font-weight: 700;
  transition: 0.3s;
}

.btn-primary:hover {
  transform: translateY(-2px);
}

.section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 80px 24px;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.card {
  background: white;
  padding: 28px;
  border-radius: 20px;
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
  transition: 0.3s;
}

.card:hover {
  transform: translateY(-6px);
}

.footer {
  background: #0b2d3b;
  color: white;
  text-align: center;
  padding: 28px;
}

.whatsapp-float {
  position: fixed;
  right: 24px;
  bottom: 24px;
  background: #25D366;
  color: white;
  text-decoration: none;
  padding: 14px 18px;
  border-radius: 999px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  box-shadow: 0 12px 30px rgba(37, 211, 102, 0.35);
  z-index: 999;
  transition: all 0.3s ease;
  animation: whatsappPulse 2.5s infinite;
}

.whatsapp-float:hover {
  transform: translateY(-3px) scale(1.03);
}

.whatsapp-icon {
  width: 24px;
  height: 24px;
}

@keyframes whatsappPulse {
  0% {
    box-shadow: 0 0 0 0 rgba(37, 211, 102, 0.45);
  }

  70% {
    box-shadow: 0 0 0 18px rgba(37, 211, 102, 0);
  }

  100% {
    box-shadow: 0 0 0 0 rgba(37, 211, 102, 0);
  }
}

.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.8s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 768px) {
  .hero {
    grid-template-columns: 1fr;
    text-align: center;
    padding: 60px 20px;
  }

  .hero h1 {
    font-size: 2.1rem;
  }

  .nav-links {
    flex-direction: column;
    position: absolute;
    top: 85px;
    right: 20px;
    background: white;
    padding: 20px;
    border-radius: 16px;
    box-shadow: 0 15px 35px rgba(15, 23, 42, 0.12);
    display: none;
    min-width: 220px;
  }

  .nav-links.active {
    display: flex;
  }

  .logo img {
    height: 44px;
  }

  .menu-toggle {
    display: block;
    font-size: 28px;
    cursor: pointer;
    color: #0b2d3b;
    font-weight: bold;
  }
}