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

body {
  font-family: 'Open Sans', sans-serif;
  color: #111;
  background-color: #fff;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;

}

main {
  padding-top: 140px;
  /* Ajusta según la altura de tu header */
}

/* HEADER */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: #fff;
  z-index: 999;
  border-bottom: 1px solid #ccc;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
  padding: 15px 0px 30px 0px;
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.logo-header {
  height: 110px;
  /* Aumentado */
  max-width: 500px;
  object-fit: contain;
  flex-shrink: 0;
}

/* Menú ocupa todo el espacio entre logo y botones */
.main-nav {
  flex: 1;
  display: flex;
  justify-content: center;
}

.main-nav ul {
  display: flex;
  gap: 40px;
  list-style: none;
}

.main-nav a {
  text-decoration: none;
  color: #111;
  font-size: 20px;
  /* Más grande */
  font-weight: 600;

}

.main-nav a:hover {
  color: #002F87;
}

/* Botones de idioma alineados a la derecha */
.language-switch {
  display: flex;
  gap: 10px;
}

.language-switch button {
  padding: 6px 12px;
  font-size: 14px;
  background-color: #fff;
  border: 1px solid #ccc;
  cursor: pointer;
}

.language-switch button:hover {
  background-color: #eee;
}

/* FOOTER */
.site-footer {
  background-color: #f7f7f7;
  padding: 40px 0;
}

.footer-container {
  display: flex;
  justify-content: space-evenly;
  flex-wrap: wrap;
  gap: 40px;
}

.footer-logo img {
  height: 100px;
  margin-bottom: 15px;
}

.social-icons {
  display: flex;
  gap: 10px;
}

.social-icons a img {
  width: 25px;
  height: 25px;
}

.footer-links h3 {
  font-size: 18px;
  margin-bottom: 15px;
  color: #111;
}

.footer-links ul {
  list-style: none;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  color: #111;
  text-decoration: none;
}

.footer-links a:hover {
  text-decoration: underline;
}

/* RESPONSIVE DESIGN */
@media (max-width: 1024px) {
  .main-nav a {
    font-size: 18px;
  }

  .logo-header {
    height: 80px;
  }

  .footer-logo img {
    height: 80px;
  }
}

@media (max-width: 768px) {
  .header-container {
    flex-direction: column;
    align-items: center;
    gap: 15px;
  }

  .main-nav {
    width: 100%;
    justify-content: center;
  }

  .main-nav ul {
    flex-direction: row;
    align-items: center;
    gap: 15px;
  }

  .main-nav a {
    font-size: 18px;
  }

  .language-switch {
    justify-content: center;
  }

  .logo-header {
    height: 70px;
  }

  .footer-container {
    flex-direction: column;
    align-items: center;
    gap: 20px;
    text-align: center;
  }

  .social-icons {
    justify-content: center;
    flex-wrap: wrap;
  }

  .footer-links h3 {
    margin-top: 20px;
  }
}

@media (max-width: 480px) {
  .logo-header {
    height: 60px;
  }

  .main-nav a {
    font-size: 16px;
  }

  .language-switch button {
    font-size: 12px;
    padding: 5px 10px;
  }

  .footer-logo img {
    height: 60px;
  }

  .social-icons a img {
    width: 22px;
    height: 22px;
  }

  .tarjetas-moleculas {
    gap: 2rem;
    /* reemplaza el espaciado excesivo por uno razonable */
    margin-bottom: 2rem;
  }


}