:root {
  --azul-petroleo: #004e64;
  --blanco: #ffffff;
  --gris-claro: #e0e0e0;
  --azul-claro: #a6cfd5;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Segoe UI', sans-serif;
  background: var(--blanco);
  color: #333;
}

/* Header y navegación */
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--blanco); /* antes era azul petróleo */
  padding: 10px 20px;
  color: var(--azul-petroleo); /* cambiar color del texto base */
  position: sticky;
  top: 0;
  z-index: 1000;
  border-bottom: 2px solid var(--azul-petroleo); /* opcional, para separación visual */
}


.logo {
  max-width: 140px;
  height: auto;
  object-fit: contain;
}


nav {
  position: relative;
}



.nav-links {
  display: flex;
  gap: 20px;
  list-style: none;
  padding: 0;
  margin: 0;
}

.nav-links a {
  color: var(--azul-petroleo); /* antes era blanco */
  text-decoration: none;
  font-weight: 500;
}
#menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--azul-petroleo); /* cambio aquí también */
  font-size: 24px;
  cursor: pointer;
}

/* Carrusel */
.hero {
  position: relative;
  height: 400px;
  overflow: hidden;
  background: var(--azul-claro);
}

#carousel {
  width: 100%;
  height: 100%;
  position: relative;
}

.slide {
  position: absolute;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 1s ease-in-out;
  display: flex;
  align-items: center;
  justify-content: center;
  background-size: cover;
  background-position: center;
}

.slide.active {
  opacity: 1;
}

.slide h2 {
  background: rgba(0, 0, 0, 0.5);
  color: var(--blanco);
  padding: 10px 20px;
  border-radius: 5px;
  font-size: 24px;
}

/* Secciones */
main section {
  display: none;
  padding: 40px 20px;
  animation: fadeIn 0.5s ease-in forwards;
  opacity: 0;
}

main section.fade {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

h2 {
  color: var(--azul-petroleo);
}

/* Formulario */
form {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-width: 500px;
  margin-top: 20px;
}

form input,
form textarea {
  padding: 10px;
  border: 1px solid var(--gris-claro);
  border-radius: 4px;
  font-size: 16px;
}

form button {
  background: var(--azul-petroleo);
  color: var(--blanco);
  border: none;
  padding: 12px;
  font-size: 16px;
  cursor: pointer;
}

form button:hover {
  background: #00394d;
}

/* Contacto */
.contact-details p {
  margin: 6px 0;
}

/* Footer */
footer {
  background: var(--gris-claro);
  text-align: center;
  padding: 15px;
  margin-top: 40px;
}

/* Responsive */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    flex-direction: column;
    background: var(--blanco);
    border: 1px solid var(--azul-petroleo);
    position: absolute;
    top: 50px;
    right: 0;
    width: 180px;
    padding: 10px;
  }

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

  #menu-toggle {
    display: block;
  }

  .nav-links a {
    color: var(--azul-petroleo);
  }

  .logo {
    max-width: 100px;
  }
}