/**
 * ELECTROPOWER GENERATION - SISTEMA DE COMPONENTES B2B
 * Archivo: public/assets/css/design-system.css
 * Soluciones en Energía e Hidráulicos S.A.S.
 */

/* ==========================================================================
   RESET & BASE TYPOGRAPHY
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--ep-font-sans);
  font-size: var(--ep-text-base);
  line-height: var(--ep-leading-normal);
  color: var(--ep-color-text-body);
  background-color: var(--ep-color-surface-light);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--ep-font-heading);
  color: var(--ep-color-text-title);
  font-weight: var(--ep-font-bold);
  line-height: var(--ep-leading-snug);
}

a {
  color: var(--ep-color-navy-primary);
  text-decoration: none;
  transition: color var(--ep-transition-fast);
}
a:hover {
  color: var(--ep-color-red-primary);
}

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

/* ==========================================================================
   CONTENEDORES Y REJILLA (CONTAINERS & GRID)
   ========================================================================== */
.ep-container {
  width: 100%;
  max-width: var(--ep-container-xl);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--ep-container-gutter);
  padding-right: var(--ep-container-gutter);
}

.ep-container-fluid {
  width: 100%;
  padding-left: var(--ep-container-gutter);
  padding-right: var(--ep-container-gutter);
}

.ep-grid {
  display: grid;
  gap: var(--ep-space-6);
}

.ep-grid-2 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.ep-grid-3 { grid-template-columns: repeat(auto-fit, minmax(290px, 1fr)); }
.ep-grid-4 { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }

@media (max-width: 768px) {
  .ep-grid-2, .ep-grid-3, .ep-grid-4 {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   SISTEMA DE BOTONES (BUTTON HIERARCHY)
   ========================================================================== */
.ep-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--ep-space-2);
  padding: 0.75rem 1.5rem;
  font-family: var(--ep-font-sans);
  font-size: var(--ep-text-sm);
  font-weight: var(--ep-font-bold);
  line-height: 1;
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border-radius: var(--ep-radius-sm);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--ep-transition-fast);
  user-select: none;
  white-space: nowrap;
}

/* Primario: Rojo Energía (Acción de compra principal, Checkout) */
.ep-btn-primary {
  background-color: var(--ep-color-red-primary);
  color: var(--ep-color-white);
  border-color: var(--ep-color-red-primary);
}
.ep-btn-primary:hover {
  background-color: var(--ep-color-red-hover);
  border-color: var(--ep-color-red-hover);
  color: var(--ep-color-white);
  box-shadow: 0 4px 14px rgba(var(--ep-color-red-rgb), 0.35);
  transform: translateY(-1px);
}
.ep-btn-primary:active {
  transform: translateY(0);
}

/* Secundario: Azul Marino Industrial (Catálogo, Detalles técnicos) */
.ep-btn-secondary {
  background-color: var(--ep-color-navy-primary);
  color: var(--ep-color-white);
  border-color: var(--ep-color-navy-primary);
}
.ep-btn-secondary:hover {
  background-color: var(--ep-color-navy-hover);
  border-color: var(--ep-color-navy-hover);
  color: var(--ep-color-white);
  box-shadow: 0 4px 14px rgba(var(--ep-color-navy-rgb), 0.35);
  transform: translateY(-1px);
}

/* Outline: Botón con borde limpio */
.ep-btn-outline {
  background-color: transparent;
  color: var(--ep-color-navy-primary);
  border-color: var(--ep-color-navy-primary);
}
.ep-btn-outline:hover {
  background-color: var(--ep-color-navy-primary);
  color: var(--ep-color-white);
}

/* Outline Rojo */
.ep-btn-outline-red {
  background-color: transparent;
  color: var(--ep-color-red-primary);
  border-color: var(--ep-color-red-primary);
}
.ep-btn-outline-red:hover {
  background-color: var(--ep-color-red-primary);
  color: var(--ep-color-white);
}

/* Botón WhatsApp Comercial Oficial */
.ep-btn-whatsapp {
  background-color: var(--ep-color-whatsapp);
  color: var(--ep-color-white);
  border-color: var(--ep-color-whatsapp);
}
.ep-btn-whatsapp:hover {
  background-color: var(--ep-color-whatsapp-hover);
  border-color: var(--ep-color-whatsapp-hover);
  color: var(--ep-color-white);
  box-shadow: 0 4px 14px rgba(var(--ep-color-whatsapp-rgb), 0.40);
  transform: translateY(-1px);
}

/* Tamaños de Botón */
.ep-btn-sm {
  padding: 0.5rem 1rem;
  font-size: var(--ep-text-xs);
}
.ep-btn-lg {
  padding: 1rem 2rem;
  font-size: var(--ep-text-base);
}
.ep-btn-block {
  width: 100%;
}

/* ==========================================================================
   SISTEMA DE BADGES / ETIQUETAS DE ESTADO
   ========================================================================== */
.ep-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.65rem;
  font-size: var(--ep-text-xs);
  font-weight: var(--ep-font-bold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: var(--ep-radius-xs);
  line-height: 1.2;
}

.ep-badge-success {
  background-color: var(--ep-color-success-bg);
  color: var(--ep-color-success);
  border: 1px solid rgba(22, 163, 74, 0.2);
}

.ep-badge-warning {
  background-color: var(--ep-color-warning-bg);
  color: var(--ep-color-warning);
  border: 1px solid rgba(217, 119, 6, 0.2);
}

.ep-badge-danger {
  background-color: var(--ep-color-danger-bg);
  color: var(--ep-color-danger);
  border: 1px solid rgba(220, 38, 38, 0.2);
}

.ep-badge-navy {
  background-color: var(--ep-color-navy-primary);
  color: var(--ep-color-white);
}

.ep-badge-red {
  background-color: var(--ep-color-red-primary);
  color: var(--ep-color-white);
}

.ep-badge-pulse-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--ep-color-danger);
  animation: epPulse 1.8s infinite;
}

@keyframes epPulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(229, 57, 53, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 6px rgba(229, 57, 53, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(229, 57, 53, 0); }
}

/* ==========================================================================
   SISTEMA DE TARJETAS (CARDS COMERCIALES HÍBRIDAS)
   ========================================================================== */

/* Tarjeta Base */
.ep-card {
  background-color: var(--ep-color-surface-card);
  border: 1px solid var(--ep-color-border-subtle);
  border-radius: var(--ep-radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all var(--ep-transition-normal);
}
.ep-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--ep-shadow-lg);
  border-color: var(--ep-color-border-strong);
}

/* 1. Tarjeta Producto Repuesto (Venta Directa Online) */
.ep-product-card {
  height: 100%;
}
.ep-product-card .ep-card-img-wrap {
  position: relative;
  background-color: #F8FAFC;
  padding: var(--ep-space-4);
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 1 / 1;
  border-bottom: 1px solid var(--ep-color-border-subtle);
}
.ep-product-card .ep-card-img-wrap img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  transition: transform var(--ep-transition-normal);
}
.ep-product-card:hover .ep-card-img-wrap img {
  transform: scale(1.05);
}
.ep-product-card .ep-card-badge-top {
  position: absolute;
  top: 10px;
  left: 10px;
}
.ep-product-card .ep-card-body {
  padding: var(--ep-space-5);
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}
.ep-product-card .ep-card-brand {
  font-size: var(--ep-text-xs);
  font-weight: var(--ep-font-bold);
  color: var(--ep-color-navy-primary);
  text-transform: uppercase;
  margin-bottom: 4px;
}
.ep-product-card .ep-card-title {
  font-size: var(--ep-text-base);
  font-weight: var(--ep-font-semibold);
  color: var(--ep-color-text-title);
  margin-bottom: var(--ep-space-3);
  line-height: var(--ep-leading-snug);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  height: 2.6em;
}
.ep-product-card .ep-card-pricing {
  margin-top: auto;
  padding-top: var(--ep-space-3);
  border-top: 1px dashed var(--ep-color-border-subtle);
}
.ep-product-card .ep-price-main {
  font-size: var(--ep-text-xl);
  font-weight: var(--ep-font-extrabold);
  color: var(--ep-color-red-primary);
}
.ep-product-card .ep-price-compare {
  font-size: var(--ep-text-xs);
  color: var(--ep-color-text-muted);
  text-decoration: line-through;
  margin-left: 6px;
}
.ep-product-card .ep-price-iva-note {
  font-size: var(--ep-text-xs);
  color: var(--ep-color-text-muted);
}
.ep-product-card .ep-card-action {
  margin-top: var(--ep-space-4);
}

/* 2. Tarjeta Equipo Mayor (Cotización Técnica Asistida - Plantas Eléctricas) */
.ep-genset-card {
  border-top: 4px solid var(--ep-color-navy-primary);
  height: 100%;
}
.ep-genset-card .ep-card-img-wrap {
  position: relative;
  background-color: #F8FAFC;
  padding: var(--ep-space-4);
  aspect-ratio: 16 / 10;
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 1px solid var(--ep-color-border-subtle);
}
.ep-genset-card .ep-card-img-wrap img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}
.ep-genset-card .ep-kva-badge {
  position: absolute;
  top: 12px;
  right: 12px;
  background: var(--ep-color-navy-dark);
  color: #F59E0B; /* Color maquinaria diésel */
  font-size: var(--ep-text-sm);
  font-weight: var(--ep-font-extrabold);
  padding: 6px 12px;
  border-radius: var(--ep-radius-xs);
  border: 1px solid #F59E0B;
}
.ep-genset-card .ep-card-body {
  padding: var(--ep-space-5);
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}
.ep-genset-card .ep-specs-list {
  list-style: none;
  margin: var(--ep-space-3) 0 var(--ep-space-4);
  font-size: var(--ep-text-xs);
  color: var(--ep-color-text-muted);
}
.ep-genset-card .ep-specs-list li {
  display: flex;
  justify-content: space-between;
  padding: 4px 0;
  border-bottom: 1px solid #F1F5F9;
}
.ep-genset-card .ep-specs-list strong {
  color: var(--ep-color-text-body);
}

/* 3. Tarjeta Categoría */
.ep-category-card {
  background: var(--ep-color-white);
  border: 1px solid var(--ep-color-border-subtle);
  border-radius: var(--ep-radius-md);
  padding: var(--ep-space-6);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--ep-space-3);
  transition: all var(--ep-transition-normal);
  text-decoration: none;
}
.ep-category-card:hover {
  transform: translateY(-4px);
  border-color: var(--ep-color-red-primary);
  box-shadow: var(--ep-shadow-md);
}
.ep-category-icon {
  width: 64px;
  height: 64px;
  object-fit: contain;
}
.ep-category-title {
  font-size: var(--ep-text-sm);
  font-weight: var(--ep-font-bold);
  color: var(--ep-color-navy-primary);
}

/* 4. Tarjeta Servicio Industrial */
.ep-service-card {
  background: var(--ep-color-white);
  border: 1px solid var(--ep-color-border-subtle);
  border-radius: var(--ep-radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.ep-service-card-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}
.ep-service-card-body {
  padding: var(--ep-space-6);
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}
.ep-service-card-title {
  font-size: var(--ep-text-lg);
  color: var(--ep-color-navy-primary);
  margin-bottom: var(--ep-space-2);
}
.ep-service-card-desc {
  font-size: var(--ep-text-sm);
  color: var(--ep-color-text-body);
  line-height: var(--ep-leading-relaxed);
  margin-bottom: var(--ep-space-4);
  flex-grow: 1;
}

/* ==========================================================================
   TABLAS TÉCNICAS INDUSTRIALES (TECHNICAL SPECIFICATION GRID)
   ========================================================================== */
.ep-table-tech {
  width: 100%;
  border-collapse: collapse;
  margin: var(--ep-space-4) 0;
  font-size: var(--ep-text-sm);
  background-color: var(--ep-color-white);
  border: 1px solid var(--ep-color-border-subtle);
  border-radius: var(--ep-radius-sm);
  overflow: hidden;
}
.ep-table-tech th, 
.ep-table-tech td {
  padding: 0.85rem 1rem;
  text-align: left;
}
.ep-table-tech th {
  background-color: var(--ep-color-navy-dark);
  color: var(--ep-color-white);
  font-weight: var(--ep-font-bold);
  font-size: var(--ep-text-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.ep-table-tech tr:nth-child(even) {
  background-color: var(--ep-color-surface-light);
}
.ep-table-tech tr:hover {
  background-color: #F1F5F9;
}
.ep-table-tech td:first-child {
  font-weight: var(--ep-font-semibold);
  color: var(--ep-color-navy-primary);
  width: 35%;
}

/* ==========================================================================
   FORMULARIOS Y ENTRADAS DE DATOS (ACCESSIBLE INDUSTRIAL FORMS)
   ========================================================================== */
.ep-form-group {
  margin-bottom: var(--ep-space-4);
}
.ep-label {
  display: block;
  font-size: var(--ep-text-xs);
  font-weight: var(--ep-font-bold);
  text-transform: uppercase;
  color: var(--ep-color-text-title);
  margin-bottom: 0.4rem;
  letter-spacing: 0.03em;
}
.ep-input, 
.ep-select, 
.ep-textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  font-family: var(--ep-font-sans);
  font-size: var(--ep-text-sm);
  color: var(--ep-color-text-body);
  background-color: var(--ep-color-white);
  border: 1.5px solid var(--ep-color-border-strong);
  border-radius: var(--ep-radius-sm);
  transition: border-color var(--ep-transition-fast), box-shadow var(--ep-transition-fast);
}
.ep-input:focus, 
.ep-select:focus, 
.ep-textarea:focus {
  outline: none;
  border-color: var(--ep-color-navy-primary);
  box-shadow: 0 0 0 3px rgba(var(--ep-color-navy-rgb), 0.15);
}
.ep-input.is-invalid {
  border-color: var(--ep-color-danger);
}
.ep-feedback-invalid {
  font-size: var(--ep-text-xs);
  color: var(--ep-color-danger);
  margin-top: 0.25rem;
}

/* Utilidades */
.text-center { text-align: center; }
.text-right { text-align: right; }
.ep-text-bold { font-weight: var(--ep-font-bold); }
.ep-text-red { color: var(--ep-color-red-primary); }
.ep-text-navy { color: var(--ep-color-navy-primary); }
.ep-text-muted { color: var(--ep-color-text-muted); }
.ep-text-xs { font-size: var(--ep-text-xs); }
.ep-text-sm { font-size: var(--ep-text-sm); }
.mt-4 { margin-top: var(--ep-space-4); }
.mb-4 { margin-bottom: var(--ep-space-4); }
.py-8 { padding-top: var(--ep-space-8); padding-bottom: var(--ep-space-8); }
.py-12 { padding-top: var(--ep-space-12); padding-bottom: var(--ep-space-12); }