/* Tipografía y reset */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;600&display=swap');

* { box-sizing: border-box; }
body {
  font-family: 'Poppins', sans-serif;
  margin: 0;
  padding: 0;
  padding-top: 80px;
  background: #f9f9f9;
  color: #333;
}

/* HEADER: escritorio (logo a la izquierda, menú a la derecha) */
header {
  background: #004080;
  color: #fff;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
}

 .logo img {
  height: 50px; /**/
  display: block; /**/
}

/* menú horizontal por defecto (escritorio/tablet) */
 nav ul {
  list-style: none;
  display: flex;
  gap: 20px;
  margin: 0;
  padding: 0;
  align-items: center;
}

 nav ul li { margin: 0; }

 nav ul li a {
  color: #fff;
  text-decoration: none;
  font-weight: 500;
  padding: 6px 10px;
  border-radius: 4px;
}
 nav ul li a:hover {
  background: rgba(255,255,255,0.06);
}

/* Secciones y tarjetas (mantengo tu aspecto anterior) */
.hero {
  background: #004080;
  color: white;
  text-align: center;
  padding: 100px 20px;
}
section { padding: 60px 20px; }
.products {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
}
.card {
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 4px 8px rgba(0,0,0,0.1);
  overflow: hidden;
  transition: transform 0.3s;
}
.card img { width: 100%; height: 180px; object-fit: cover; }
.card h3 { margin: 15px; }
.card a {
  display: block;
  margin: 15px;
  padding: 10px;
  text-align: center;
  background: #004080;
  color: #fff;
  border-radius: 5px;
  text-decoration: none;
}

/* Formularios y tablas (mantener) */
form {
  max-width: 500px;
  margin: auto;
  background: #f5f5f5;
  padding: 20px;
  border-radius: 8px;
}
input, textarea, button {
  width: 100%;
  margin: 8px 0;
  padding: 10px;
  border: 1px solid #ccc;
  border-radius: 5px;
}
.hidden { display: none; }

.table-container {
  margin-top: 30px;
  overflow-x: auto;
}

.product-table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
  overflow: hidden;
}

.product-table th, .product-table td {
  padding: 12px 15px;
  text-align: center;
  border-bottom: 1px solid #ddd;
}

.product-table th {
  background-color: #004080;
  color: #fff;
  font-weight: 600;
}

.product-table tr:nth-child(even) {
  background-color: #f5f5f5;
}

.product-table tr:hover {
  background-color: #e9f1ff;
}

/* FOOTER */
footer {
  background: #222;
  color: #fff;
  text-align: center;
  padding: 20px;
}

/* -------------------------
   RESPONSIVE: MÓVIL (<=768px)
   menú debajo del logo en grid 2x2
   ------------------------- */
@media (max-width: 768px) {

header {
    flex-direction: column;
    align-items: center;
  }

  nav ul {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-top: 15px;
    width: 100%;
    max-width: 300px;
    text-align: center;
  }

  nav ul li {
    margin: 0;
  }

  nav ul li a {
    display: block;
    padding: 12px;
    background: #0066cc;
    border-radius: 8px;
  }

  nav ul li a:hover {
    background: #0055aa;
    color: #fff;
  }
  .hero {
    padding: 40px 16px;
  }

  section { padding: 40px 14px; }
}
/* Estilos solo para los links de la sección descargas */
#descargas a {
  display: inline-block;
  padding: 12px 18px;
  margin: 8px 0;
  text-decoration: none;
  font-weight: 600;
  color: #000;              /* texto negro */
  background-color: #f5f5f5;
  border: 1px solid #ccc;
  border-radius: 8px;
  transition: background-color 0.3s, transform 0.2s;
}

/* Hover: efecto elegante al pasar el mouse */
#descargas a:hover {
  background-color: #e0e0e0;
  transform: translateY(-2px);
}

/* Estado activo o visitado: mismo color negro */
#descargas a:visited,
#descargas a:active {
  color: #000;
}