/* ============================================================
   HULE BANDA — estilos.css
   CSS3 puro · Flexbox · Mobile-first
   ============================================================ */

/* ===== VARIABLES ===== */
:root {
  --azul-oscuro: #031736;
  --azul-medio: #1a3e70;
  --azul-claro: #5a79ae;
  --gris-fondo: #353c42;
  --gris-claro: #dce5ee;
  --blanco: #ffffff;
  --rojo: #ff0000;
  --amarillo: #ffff00;
  --contenedor: 1024px;
  --radio: 6px;
  --sombra: 0 2px 8px rgba(0, 0, 0, .15);
}

/* ===== RESET ===== */
*,
*::before,
*::after {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 15px;
  line-height: 1.55;
  color: #333;
  background: var(--gris-fondo) url(../images/fondo.jpg) repeat;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
  border: 0;
}
a {
  color: var(--azul-claro);
  text-decoration: none;
  transition: color .2s;
}
a:hover,
a:focus {
  color: var(--rojo);
}
ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.contenedor {
  width: 100%;
  max-width: var(--contenedor);
  margin: 0 auto;
  padding: 0 15px;
}

/* ============================================================
   HEADER
   ============================================================ */
.site-header {
  background: var(--blanco);
  box-shadow: var(--sombra);
}
.header-flex {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  padding: 12px 15px;
  gap: 15px;
}
.logo img {
  width: 180px;
}

.header-texto {
  flex: 1 1 400px;
  min-width: 250px;
}
.header-texto h1 {
  margin: 0 0 6px;
  font-size: 1.25rem;
  line-height: 1.3;
  color: var(--azul-oscuro);
  font-weight: bold;
  text-transform: none;
  border: none;
  padding: 0;
}
.header-texto .subtitulo {
  margin: 0;
  font-size: .82rem;
  color: #555;
  line-height: 1.4;
}

.telefono {
  color: var(--azul-oscuro);
  font-weight: bold;
  font-size: 1rem;
  white-space: nowrap;
}
.telefono:hover {
  color: var(--rojo);
}

.menu-toggle {
  display: none;
  background: var(--azul-oscuro);
  color: #fff;
  border: 0;
  font-size: 1.5rem;
  padding: 6px 12px;
  border-radius: var(--radio);
  cursor: pointer;
}

/* ============================================================
   NAV
   ============================================================ */
.nav-principal {
  background: var(--azul-oscuro);
}
.nav-principal ul {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
}
.nav-principal a {
  display: block;
  padding: 12px 18px;
  color: #fff;
  font-size: .95rem;
  text-transform: capitalize;
  transition: background .2s;
}
.nav-principal a:hover,
.nav-principal a.activo {
  background: var(--azul-medio);
  color: #fff;
}

/* ============================================================
   CARRUSEL 3D
   ============================================================ */
.carrusel-3d {
  background: var(--azul-medio);
  border: 2px solid var(--azul-oscuro);
  border-radius: var(--radio);
  width: 100%;
  max-width: 960px;
  height: 420px;
  margin: 20px auto;
  position: relative;
  overflow: hidden;
}
#carousel {
  position: relative;
  width: 100%;
  height: 100%;
}
#carousel > div {
  position: absolute;
  top: 0;
  left: 0;
}
#carousel img {
  width: 200px;
  height: 150px;
  object-fit: cover;
  border-radius: var(--radio);
  box-shadow: 0 4px 12px rgba(0, 0, 0, .4);
}

/* ============================================================
   CONTENIDO PRINCIPAL
   ============================================================ */
.contenido-principal {
  background: #fff;
  border-radius: var(--radio);
  max-width: var(--contenedor);
  margin: 0 auto 20px;
  padding: 25px;
  box-shadow: var(--sombra);
}
.contenido-flex {
  display: flex;
  gap: 30px;
  flex-wrap: wrap;
}
.columna-texto {
  flex: 1 1 620px;
}
.columna-lateral {
  flex: 1 1 260px;
}

.bloque {
  margin-bottom: 25px;
}
.bloque h2,
.bloque-lateral h2 {
  color: var(--azul-oscuro);
  font-size: 1.15rem;
  text-transform: uppercase;
  margin: 0 0 10px;
  border-bottom: 2px solid var(--azul-medio);
  padding-bottom: 5px;
}
.bloque h2 {
  font-size: 1.25rem;
}
.dos-columnas {
  display: flex;
  gap: 25px;
  flex-wrap: wrap;
}
.dos-columnas .bloque {
  flex: 1 1 280px;
}

.bloque-lateral {
  background: #f7f9fc;
  border-left: 4px solid var(--azul-medio);
  padding: 15px;
  margin-bottom: 20px;
  border-radius: var(--radio);
}
.bloque-lateral h2 {
  font-size: 1.05rem;
}
.bloque-lateral h2 a {
  color: var(--azul-oscuro);
}
.bloque-lateral h2 a:hover {
  color: var(--rojo);
}
.bloque-lateral p {
  margin: 0 0 10px;
  font-size: .92rem;
}
.centrado {
  text-align: center;
}

.btn-link {
  display: inline-block;
  color: var(--azul-medio);
  font-weight: bold;
  border-bottom: 1px solid var(--azul-medio);
}
.btn-link:hover {
  color: var(--rojo);
  border-color: var(--rojo);
}

/* ============================================================
   SITIOS DE INTERÉS (horizontal en escritorio)
   ============================================================ */
.lista-enlaces {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 25px;
  align-items: center;
}
.lista-enlaces li {
  margin: 0;
}
.lista-enlaces a {
  color: var(--azul-claro);
}
.lista-enlaces a:hover {
  color: var(--rojo);
}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  background: var(--azul-oscuro);
  color: var(--gris-claro);
  padding: 30px 0 20px;
  font-size: .9rem;
}
.footer-contacto {
  text-align: center;
  margin: 0 0 15px;
}
.footer-contacto a {
  color: var(--amarillo);
}
.footer-contacto a:hover {
  color: var(--rojo);
}

.footer-menu {
  text-align: center;
  margin-bottom: 25px;
  color: var(--gris-claro);
}
.footer-menu a {
  color: var(--gris-claro);
  margin: 0 4px;
}
.footer-menu a:hover {
  color: var(--rojo);
}

.footer-columnas {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: space-between;
}
.footer-columnas > div {
  flex: 1 1 200px;
}
.footer-columnas ul li {
  margin-bottom: 5px;
}
.footer-columnas a {
  color: var(--gris-claro);
}
.footer-columnas a:hover {
  color: var(--rojo);
}
.footer-columnas p {
  margin: 0 0 8px;
}

.copyright {
  text-align: center;
  margin: 25px 0 0;
  font-size: .8rem;
  opacity: .8;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 768px) {
  /* --- Menú --- */
  .menu-toggle {
    display: block;
  }
  .nav-principal {
    display: none;
  }
  .nav-principal.abierto {
    display: block;
  }
  .nav-principal ul {
    flex-direction: column;
  }
  .nav-principal a {
    padding: 14px 20px;
    border-bottom: 1px solid rgba(255, 255, 255, .1);
  }

  /* --- Header --- */
  .header-flex {
    gap: 10px;
  }
  .header-texto h1 {
    font-size: 1.05rem;
  }
  .header-texto .subtitulo {
    font-size: .75rem;
  }
  .telefono {
    display: none;
  }

  /* --- Carrusel --- */
  .carrusel-3d {
    height: 320px;
    margin: 15px;
    max-width: calc(100% - 30px);
  }
  #carousel img {
    width: 140px;
    height: 105px;
  }

  /* --- Contenido --- */
  .contenido-principal {
    margin: 0 15px 15px;
    padding: 15px;
  }

  /* --- Sitios de interés: horizontal → columna --- */
  .lista-enlaces {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
}

/* ============================================================
   PÁGINAS INTERIORES
   ============================================================ */

/* Breadcrumb */
.breadcrumb {
  background: #f7f9fc;
  padding: 10px 15px;
  border-radius: var(--radio);
  margin-bottom: 20px;
  font-size: .9rem;
}
.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  list-style: none;
  padding: 0;
  margin: 0;
}
.breadcrumb li + li::before {
  content: '›';
  margin-right: 6px;
  color: var(--azul-medio);
}
.breadcrumb a {
  color: var(--azul-claro);
}
.breadcrumb a:hover {
  color: var(--rojo);
}
.breadcrumb [aria-current="page"] {
  color: #333;
  font-weight: bold;
}

/* H1 de página interior */
main.contenedor > h1,
.columna-texto > h1 {
  color: var(--azul-oscuro);
  font-size: 1.8rem;
  text-transform: uppercase;
  margin: 0 0 20px;
  padding-bottom: 10px;
  border-bottom: 3px solid var(--azul-medio);
}

/* Subtítulos h3 dentro de bloques */
.columna-texto h3 {
  color: var(--azul-medio);
  font-size: 1.05rem;
  margin: 20px 0 10px;
  text-transform: none;
}

/* Tablas de propiedades */
.columna-texto table {
  width: 100%;
  border-collapse: collapse;
  margin: 10px 0 20px;
  font-size: .9rem;
}
.columna-texto th {
  background: var(--azul-medio);
  color: #fff;
  padding: 8px 10px;
  text-align: center;
  font-weight: 600;
  border: 1px solid #0d2850;
}
.columna-texto td {
  padding: 8px 10px;
  text-align: center;
  border: 1px solid #dde4ee;
  background: #fff;
}
.columna-texto tbody tr:nth-child(even) td {
  background: #f7f9fc;
}

/* Imágenes destacadas de producto */
.featured-thumbnail {
  margin: 0 0 15px;
  text-align: center;
}
.featured-thumbnail img {
  max-width: 400px;
  width: 100%;
  height: auto;
  border-radius: var(--radio);
  box-shadow: 0 2px 8px rgba(0,0,0,.15);
  margin: 0 auto;
}

/* Sidebar: lista de materiales */
.lista-materiales {
  max-height: 400px;
  overflow-y: auto;
  padding-right: 6px;
  font-size: .88rem;
}
.lista-materiales li {
  margin-bottom: 4px;
  padding: 3px 0;
  border-bottom: 1px dashed #e0e6ef;
}
.lista-materiales li:last-child {
  border-bottom: none;
}
.lista-materiales a {
  color: var(--azul-claro);
  display: block;
  padding: 2px 0;
}
.lista-materiales a:hover {
  color: var(--rojo);
}
.lista-materiales a.activo {
  color: var(--rojo);
  font-weight: bold;
}

/* Responsive */
@media (max-width: 768px) {
  .columna-texto > h1 {
    font-size: 1.3rem;
  }
  .columna-texto table {
    font-size: .8rem;
  }
  .columna-texto th,
  .columna-texto td {
    padding: 5px 4px;
  }
  .lista-materiales {
    max-height: none;
  }
}

.footer-legal {
  text-align: center;
  margin: 15px 0 0;
  font-size: .82rem;
  color: var(--gris-claro);
}
.footer-legal a {
  color: var(--gris-claro);
  margin: 0 6px;
}
.footer-legal a:hover {
  color: var(--rojo);
}

/* ============================================================
   GRID DE PRODUCTOS (para páginas índice)
   ============================================================ */
.grid-productos {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: center;
  margin: 20px 0;
}
.card-producto {
  flex: 0 0 180px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 15px 10px;
  border: 1px solid #e0e6ef;
  border-radius: var(--radio);
  background: #fff;
  transition: transform .2s, box-shadow .2s;
}
.card-producto:hover {
  transform: translateY(-3px);
  box-shadow: var(--sombra);
  color: var(--rojo);
}
.card-producto img {
  width: 100%;
  max-width: 150px;
  height: 120px;
  object-fit: contain;
  margin-bottom: 10px;
}
.card-producto p {
  font-size: .88rem;
  color: var(--azul-oscuro);
  margin: 0;
  line-height: 1.3;
}
.card-producto:hover p {
  color: var(--rojo);
}

@media (max-width: 768px) {
  .grid-productos { gap: 12px; }
  .card-producto { flex: 0 0 130px; padding: 10px; }
  .card-producto img { height: 90px; }
  .card-producto p { font-size: .78rem; }
}

/* ============================================================
   FORMULARIO DE CONTACTO
   ============================================================ */
.form-grupo {
  display: flex;
  flex-direction: column;
  margin-bottom: 18px;
}
.form-grupo label {
  font-weight: 600;
  color: var(--azul-oscuro);
  margin-bottom: 6px;
  font-size: .95rem;
}
.form-grupo input,
.form-grupo textarea {
  padding: 11px 14px;
  border: 1px solid #ccd4e0;
  border-radius: var(--radio);
  font-family: inherit;
  font-size: 1rem;
  transition: border-color .2s, box-shadow .2s;
  background: #fff;
}
.form-grupo input:focus,
.form-grupo textarea:focus {
  outline: none;
  border-color: var(--azul-medio);
  box-shadow: 0 0 0 3px rgba(26, 62, 112, .15);
}
.form-grupo textarea {
  resize: vertical;
  min-height: 130px;
}

.btn-enviar {
  display: inline-block;
  background: var(--azul-medio);
  color: #fff;
  border: 0;
  padding: 12px 32px;
  font-size: 1rem;
  font-weight: bold;
  border-radius: var(--radio);
  cursor: pointer;
  transition: background .2s, transform .1s;
}
.btn-enviar:hover {
  background: var(--azul-oscuro);
}
.btn-enviar:active {
  transform: translateY(1px);
}
.btn-enviar:disabled {
  opacity: .7;
  cursor: not-allowed;
}

/* Honeypot: oculto a humanos, visible a bots (que llenan todo) */
.hp-field {
  position: absolute !important;
  left: -9999px !important;
  opacity: 0;
  height: 0;
  overflow: hidden;
}

/* Alertas */
.alert {
  padding: 12px 18px;
  border-radius: var(--radio);
  margin: 15px 0;
  font-size: .95rem;
}
.alert-success {
  background: #d4edda;
  color: #155724;
  border-left: 4px solid #28a745;
}
.alert-danger {
  background: #f8d7da;
  color: #721c24;
  border-left: 4px solid #dc3545;
}
.d-none { display: none !important; }

.texto-rojo { color: var(--rojo); }
.peq1 { font-size: .85rem; color: #666; }

/* ============================================================
   TABLA DE ENVÍOS
   ============================================================ */
.tabla-envios {
  width: 100%;
  border-collapse: collapse;
  font-size: .88rem;
  margin-top: 20px;
}
.tabla-envios th {
  background: var(--azul-oscuro);
  color: #fff;
  padding: 10px 8px;
  text-align: left;
  border: 1px solid #0d2850;
  font-weight: 600;
}
.tabla-envios td {
  padding: 8px;
  border: 1px solid #dde4ee;
  vertical-align: top;
}
.tabla-envios tbody tr:nth-child(even) {
  background: #f7f9fc;
}
.tabla-envios tbody tr:hover {
  background: #eef4fb;
}
.tabla-envios a {
  color: var(--azul-claro);
  word-break: break-all;
}
.tabla-envios a:hover {
  color: var(--rojo);
}

@media (max-width: 768px) {
  .tabla-envios { font-size: .78rem; }
  .tabla-envios th,
  .tabla-envios td { padding: 6px 4px; }
  .btn-enviar { width: 100%; }
}

.form-checkbox {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin: 20px 0;
  font-size: .92rem;
  color: #444;
}
.form-checkbox input[type="checkbox"] {
  width: 18px;
  height: 18px;
  margin-top: 2px;
  accent-color: var(--azul-medio);
  flex-shrink: 0;
  cursor: pointer;
}
.form-checkbox label {
  cursor: pointer;
  line-height: 1.4;
  margin: 0;
}
.form-checkbox a {
  color: var(--azul-medio);
  text-decoration: underline;
}
.form-checkbox a:hover {
  color: var(--rojo);
}

#formulario {
  max-width: 600px;
  margin: 0 auto;
}

/* ============================================================
   PÁGINA 404
   ============================================================ */
.pagina-404 {
  text-align: center;
  padding: 60px 20px;
  max-width: 700px;
  margin: 0 auto;
}
.pagina-404 h1 {
  font-size: 6rem;
  font-weight: 900;
  color: var(--azul-oscuro);
  margin: 0;
  line-height: 1;
  letter-spacing: -4px;
}
.pagina-404 h2 {
  font-size: 1.8rem;
  color: var(--azul-medio);
  margin: 10px 0 25px;
  text-transform: none;
  border: none;
  padding: 0;
}
.pagina-404 p {
  font-size: 1.05rem;
  color: #555;
  margin: 0 0 15px;
  line-height: 1.6;
}
.acciones-404 {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin: 30px 0;
}
.btn-404 {
  display: inline-block;
  padding: 12px 24px;
  border-radius: var(--radio);
  background: #fff;
  color: var(--azul-medio);
  border: 2px solid var(--azul-medio);
  font-weight: 600;
  text-decoration: none;
  transition: all .2s;
}
.btn-404:hover {
  background: var(--azul-medio);
  color: #fff;
}
.btn-404-primario {
  background: var(--azul-medio);
  color: #fff;
}
.btn-404-primario:hover {
  background: var(--azul-oscuro);
  border-color: var(--azul-oscuro);
}
.texto-contacto-404 {
  margin-top: 30px;
  font-size: .95rem;
  color: #777;
}
.texto-contacto-404 a {
  color: var(--azul-medio);
  font-weight: 600;
}
.texto-contacto-404 a:hover {
  color: var(--rojo);
}

@media (max-width: 768px) {
  .pagina-404 { padding: 40px 15px; }
  .pagina-404 h1 { font-size: 4rem; }
  .pagina-404 h2 { font-size: 1.3rem; }
  .btn-404 { padding: 10px 18px; font-size: .9rem; }
}