/* Variables y tema */
:root {
  --bg-main: #0b0f19;
  --bg-surface: #111827;
  --bg-surface-alt: #1f2937;
  --text-primary: #f9fafb;
  --text-secondary: #9ca3af;
  --border-color: #374151;
  --accent: #0284c7;
  --accent-hover: #0369a1;
  --accent-glow: rgba(2, 132, 199, 0.15);
  --font-base: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --radius: 8px;
  --transition: 0.2s ease-in-out;
}

/* Reset y base */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-base);
  background-color: var(--bg-main);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Layout general */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 4rem 0;
}

.section-header {
  text-align: center;
  margin-bottom: 3rem;
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.section-subtitle {
  color: var(--text-secondary);
  font-size: 1.05rem;
}

/* Header y navegación */
.site-header {
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.5rem;
}

.nav-logo {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  color: var(--text-primary);
}

.nav-logo span {
  color: var(--accent);
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 1.5rem;
}

.nav-link {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color var(--transition);
}

.nav-link:hover,
.nav-link.active {
  color: var(--accent);
}

/* Botones */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: background-color var(--transition), border-color var(--transition);
}

.btn-primary {
  background-color: var(--accent);
  color: #ffffff;
}

.btn-primary:hover {
  background-color: var(--accent-hover);
}

.btn-secondary {
  background-color: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background-color: var(--bg-surface-alt);
}

/* Hero section (index.html) */
.hero {
  padding: 6rem 0;
  text-align: center;
  background: radial-gradient(circle at 50% 20%, var(--accent-glow) 0%, transparent 60%);
}

.hero-title {
  font-size: 2.8rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 1.25rem;
}

.hero-description {
  max-width: 650px;
  margin: 0 auto 2rem;
  color: var(--text-secondary);
  font-size: 1.15rem;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 1rem;
}

/* Grid de catálogo / servicios (catalog.html) */
.service-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.service-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition), transform var(--transition);
}

.service-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.service-card-tag {
  align-self: flex-start;
  background-color: var(--bg-surface-alt);
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  padding: 0.25rem 0.6rem;
  border-radius: 4px;
  margin-bottom: 1rem;
}

.service-card-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.service-card-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  flex: 1;
  margin-bottom: 1.5rem;
}

.service-card-footer {
  border-top: 1px solid var(--border-color);
  padding-top: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.service-card-price {
  font-weight: 700;
  font-size: 1.1rem;
}

/* Bloques informativos (about.html) */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.about-text p {
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  margin-top: 2rem;
}

.stat-item {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  padding: 1.25rem;
  border-radius: var(--radius);
  text-align: center;
}

.stat-number {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--accent);
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* Formulario (contact.html) */
.form-container {
  max-width: 600px;
  margin: 0 auto;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 2.5rem;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  background-color: var(--bg-main);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 0.75rem;
  font-size: 0.95rem;
  font-family: inherit;
  color: var(--text-primary);
  outline: none;
  transition: border-color var(--transition);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--accent);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

/* Footer */
.site-footer {
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-color);
  padding: 2rem 0;
  margin-top: auto;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* Responsivo */
@media (max-width: 768px) {
  .nav-container {
    flex-direction: column;
    height: auto;
    padding: 1rem 0;
    gap: 1rem;
  }

  .nav-menu {
    gap: 1rem;
  }

  .hero-title {
    font-size: 2rem;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer-content {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
}

/* Imágenes de tarjetas e info */
.service-card-img {
  width: 100%;
  height: 160px;
  object-fit: cover;
  border-radius: calc(var(--radius) - 2px);
  margin-bottom: 1rem;
  border: 1px solid var(--border-color);
}

.about-img {
  width: 100%;
  height: 280px;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--border-color);
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2.5rem;
}

.product-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition), transform var(--transition);
}

.product-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.product-card img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  border-radius: calc(var(--radius) - 2px);
  margin-bottom: 1rem;
  border: 1px solid var(--border-color);
}

.product-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.product-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  flex: 1;
  margin-bottom: 1.5rem;
}

.product-card span {
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--accent);
}

.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.75rem;
  margin: 2.5rem 0;
  flex-wrap: wrap;
}

.pagination a {
  background-color: var(--bg-surface);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 500;
  transition: all var(--transition);
}

.pagination a:hover {
  background-color: var(--accent);
  border-color: var(--accent);
  color: #ffffff;
}

.pagination span {
  color: var(--text-secondary);
  font-size: 0.9rem;
  padding: 0.5rem 0.75rem;
}
/* Filtros tipo etiqueta (catalog.html) */
.filters {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  margin-bottom: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

.filter-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}

.filter-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-secondary);
  min-width: 80px;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background-color: var(--bg-surface-alt);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  font-size: 0.85rem;
  padding: 0.3rem 0.8rem;
  border-radius: 999px;
  transition: border-color var(--transition), background-color var(--transition), color var(--transition);
}

.chip small {
  color: var(--text-secondary);
  font-size: 0.75rem;
}

.chip:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.chip-active,
.chip-active:hover {
  background-color: var(--accent);
  border-color: var(--accent);
  color: #ffffff;
}

.chip-active small {
  color: rgba(255, 255, 255, 0.8);
}

.chip-sm {
  font-size: 0.75rem;
  padding: 0.15rem 0.6rem;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1.25rem;
}

.filter-summary {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}

.filter-summary strong {
  color: var(--text-primary);
}

.filter-summary a {
  color: var(--accent);
}

.product-card h3 a:hover {
  color: var(--accent);
}

.product-card .product-price {
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--accent);
}

.empty-state {
  text-align: center;
  background-color: var(--bg-surface);
  border: 1px dashed var(--border-color);
  border-radius: var(--radius);
  padding: 3rem 1.5rem;
}

.empty-state h3 {
  margin-bottom: 0.5rem;
}

.empty-state p {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

/* Mensajes y errores de formulario (contact.html) */
.messages {
  padding-top: 1.5rem;
}

.alert {
  border-radius: var(--radius);
  padding: 0.9rem 1.1rem;
  font-size: 0.95rem;
  border: 1px solid var(--border-color);
  background-color: var(--bg-surface);
}

.alert-success {
  border-color: #059669;
  background-color: rgba(5, 150, 105, 0.12);
  color: #6ee7b7;
}

.alert-error {
  border-color: #dc2626;
  background-color: rgba(220, 38, 38, 0.12);
  color: #fca5a5;
  margin-bottom: 1.5rem;
}

.form-error {
  color: #f87171;
  font-size: 0.85rem;
  margin-top: 0.4rem;
}

.has-error .form-input,
.has-error .form-select,
.has-error .form-textarea {
  border-color: #dc2626;
}

.form-check {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.form-check input {
  width: 1.05rem;
  height: 1.05rem;
  accent-color: var(--accent);
}

.form-check .form-error {
  flex-basis: 100%;
}

/* Footer: categorías del procesador de contexto */
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  list-style: none;
}

.footer-links a:hover {
  color: var(--accent);
}

/* Página de error 404 */
.error-page {
  padding: 5rem 0;
  background: radial-gradient(circle at 50% 30%, var(--accent-glow) 0%, transparent 60%);
}

.error-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.error-container .service-card-tag {
  align-self: center;
}

.error-code {
  display: flex;
  gap: 0.25rem;
  font-size: 8rem;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -4px;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.error-code-shield {
  color: var(--accent);
  text-shadow: 0 0 30px rgba(2, 132, 199, 0.45);
  animation: error-pulse 2.4s ease-in-out infinite;
}

.error-title {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.error-description {
  max-width: 560px;
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-bottom: 2rem;
}

@keyframes error-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.55; }
}

@media (max-width: 768px) {
  .error-code {
    font-size: 5.5rem;
  }

  .filter-label {
    min-width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .error-code-shield {
    animation: none;
  }
}