body {
  font-family: 'Segoe UI', sans-serif;
  margin: 0;
  background: #f4f4f4;
}

.navbar {
  background: #002b5c;
  color: white;
  display: flex;
  justify-content: space-between;
  padding: 1rem 2rem;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 100;
}

.logo {
  font-weight: bold;
  font-size: 1.4rem;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 20px;
}

.nav-links a {
  color: white;
  text-decoration: none;
  font-weight: 500;
}

.nav-links a:hover {
  color: #ffcc00;
}

.hero {
  background: linear-gradient(rgba(0,0,0,.6), rgba(0,0,0,.6)), url('https://via.placeholder.com/1600x600') center/cover;
  height: 80vh;
  display: flex;
  justify-content: center;
  align-items: center;
  color: white;
  text-align: center;
  padding: 2rem;
}

.hero-texto h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.hero-texto p {
  font-size: 1.2rem;
  margin-bottom: 2rem;
}

.btn-cta {
  background: #ffcc00;
  color: #002b5c;
  padding: 12px 20px;
  text-decoration: none;
  border-radius: 5px;
  font-weight: bold;
}

.servicios, .nosotros, .contacto {
  padding: 60px 20px;
  text-align: center;
  background: white;
}

.tarjetas {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
  margin-top: 2rem;
}

.tarjeta {
  background: #f1f1f1;
  padding: 20px;
  border-radius: 10px;
}

.contacto form {
  max-width: 600px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
}

.contacto input, .contacto textarea {
  padding: 10px;
  margin: 10px 0;
  border-radius: 5px;
  border: 1px solid #ccc;
}

.contacto button {
  background: #002b5c;
  color: white;
  padding: 10px;
  font-weight: bold;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}

.footer {
  background: #002b5c;
  color: white;
  padding: 20px;
  text-align: center;
}

/* WhatsApp botón flotante */
.whatsapp {
  position: fixed;
  bottom: 20px;
  right: 20px;
  font-size: 2rem;
  background: #25D366;
  color: white;
  border-radius: 50%;
  padding: 10px 14px;
  text-decoration: none;
  box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}