body {
  margin: 0;
  font-family: 'Segoe UI', sans-serif;
  color: white;
  background: url('../images/Puerto-Cartagena.jpg') no-repeat center center fixed;
  background-size: cover;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

header {
  background-color: #ffffff;
  padding: 15px 30px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
  border-bottom: 3px solid #005599;
}

.logo img {
  height: 90px;
}

.nav-placeholder {
  color: #005599;
  font-weight: bold;
  font-size: 1.1em;
}

main {
  text-align: center;
  margin: auto;
  padding: 40px 20px;
  background-color: rgba(0, 0, 0, 0.5);
  border-radius: 10px;
  max-width: 700px;
}

h1 {
  font-size: 2.5em;
  margin-bottom: 20px;
}

p {
  font-size: 1.2em;
  line-height: 1.6;
}

footer {
  text-align: center;
  padding: 15px;
  background-color: #003366; /* Azul corporativo */
  color: #ffffff;
  font-size: 0.9em;
}

/* 📱 Ajustes para tablets y móviles */
@media (max-width: 1024px) {
  .logo img {
    height: 70px;
  }
  h1 {
    font-size: 2em;
  }
  p {
    font-size: 1.1em;
  }
}

@media (max-width: 768px) {
  header {
    flex-direction: column;
    text-align: center;
  }
  .logo img {
    height: 60px;
    margin-bottom: 10px;
  }
  .nav-placeholder {
    font-size: 1em;
  }
  main {
    padding: 20px;
    max-width: 95%;
  }
  h1 {
    font-size: 1.8em;
  }
  p {
    font-size: 1em;
  }
}

@media (max-width: 480px) {
  .logo img {
    height: 50px;
  }
  h1 {
    font-size: 1.5em;
  }
  p {
    font-size: 0.95em;
  }
  footer {
    font-size: 0.8em;
  }
}