/**
 * EFGN Ecommerce - Sistema de Diseño
 * Variables CSS corporativas, reset y utilidades base
 *
 * Paleta extraída del logotipo y brand kit oficial de EFGN Soluciones SAS
 * Tipografías: Montserrat (títulos) + Roboto (cuerpo) - Brand Kit EFGN
 */

/* ─── Variables corporativas ─────────────────────────────────────────────── */
:root {
  /* Paleta principal - extraída del logotipo EFGN */
  --efgn-blue-cian:    #00C8FF;   /* Azul cian brillante - acentos e interactivos */
  --efgn-blue-royal:   #0057B8;   /* Azul rey - botones principales y CTA */
  --efgn-blue-dark:    #003580;   /* Azul oscuro/índigo - títulos y navegación */
  --efgn-blue-deeper:  #001F4D;   /* Azul profundo - fondos oscuros y hero */
  --efgn-blue-light:   #E8F4FF;   /* Azul muy claro - fondos secundarios */
  --efgn-blue-mid:     #1A6FBF;   /* Azul medio - hover y estados activos */

  /* Neutros */
  --efgn-white:        #FFFFFF;
  --efgn-gray-50:      #F8FAFC;
  --efgn-gray-100:     #F1F5F9;
  --efgn-gray-200:     #E2E8F0;
  --efgn-gray-300:     #CBD5E1;
  --efgn-gray-400:     #94A3B8;
  --efgn-gray-500:     #64748B;
  --efgn-gray-600:     #475569;
  --efgn-gray-700:     #334155;
  --efgn-gray-800:     #1E293B;
  --efgn-gray-900:     #0F172A;

  /* Estados semánticos */
  --efgn-success:      #16A34A;
  --efgn-success-bg:   #DCFCE7;
  --efgn-warning:      #D97706;
  --efgn-warning-bg:   #FEF3C7;
  --efgn-error:        #DC2626;
  --efgn-error-bg:     #FEE2E2;
  --efgn-info:         #0284C7;
  --efgn-info-bg:      #E0F2FE;

  /* Tipografías corporativas */
  --efgn-font-heading: 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --efgn-font-body:    'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --efgn-font-mono:    'Roboto Mono', 'Courier New', monospace;

  /* Escala tipográfica */
  --efgn-text-xs:   0.75rem;    /* 12px */
  --efgn-text-sm:   0.875rem;   /* 14px */
  --efgn-text-base: 1rem;       /* 16px */
  --efgn-text-lg:   1.125rem;   /* 18px */
  --efgn-text-xl:   1.25rem;    /* 20px */
  --efgn-text-2xl:  1.5rem;     /* 24px */
  --efgn-text-3xl:  1.875rem;   /* 30px */
  --efgn-text-4xl:  2.25rem;    /* 36px */
  --efgn-text-5xl:  3rem;       /* 48px */

  /* Pesos tipográficos */
  --efgn-font-light:    300;
  --efgn-font-regular:  400;
  --efgn-font-medium:   500;
  --efgn-font-semibold: 600;
  --efgn-font-bold:     700;
  --efgn-font-extrabold:800;

  /* Espaciado */
  --efgn-space-1:  0.25rem;
  --efgn-space-2:  0.5rem;
  --efgn-space-3:  0.75rem;
  --efgn-space-4:  1rem;
  --efgn-space-5:  1.25rem;
  --efgn-space-6:  1.5rem;
  --efgn-space-8:  2rem;
  --efgn-space-10: 2.5rem;
  --efgn-space-12: 3rem;
  --efgn-space-16: 4rem;
  --efgn-space-20: 5rem;
  --efgn-space-24: 6rem;

  /* Bordes */
  --efgn-radius-sm:  4px;
  --efgn-radius-md:  8px;
  --efgn-radius-lg:  12px;
  --efgn-radius-xl:  16px;
  --efgn-radius-2xl: 24px;
  --efgn-radius-full: 9999px;

  /* Sombras */
  --efgn-shadow-sm:  0 1px 3px rgba(0,53,128,0.08), 0 1px 2px rgba(0,53,128,0.06);
  --efgn-shadow-md:  0 4px 12px rgba(0,53,128,0.10), 0 2px 6px rgba(0,53,128,0.06);
  --efgn-shadow-lg:  0 10px 30px rgba(0,53,128,0.12), 0 4px 12px rgba(0,53,128,0.08);
  --efgn-shadow-xl:  0 20px 50px rgba(0,53,128,0.15), 0 8px 20px rgba(0,53,128,0.10);
  --efgn-shadow-blue: 0 4px 20px rgba(0,87,184,0.30);

  /* Transiciones */
  --efgn-transition-fast:   150ms ease;
  --efgn-transition-base:   250ms ease;
  --efgn-transition-slow:   400ms ease;

  /* Layout */
  --efgn-container-max:  1320px;
  --efgn-container-pad:  1.5rem;
  --efgn-header-height:  72px;

  /* Z-index */
  --efgn-z-dropdown: 100;
  --efgn-z-sticky:   200;
  --efgn-z-overlay:  300;
  --efgn-z-modal:    400;
  --efgn-z-toast:    500;
}

/* ─── Reset y base ───────────────────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--efgn-font-body);
  font-size: var(--efgn-text-base);
  font-weight: var(--efgn-font-regular);
  line-height: 1.6;
  color: var(--efgn-gray-800);
  background-color: var(--efgn-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--efgn-font-heading);
  font-weight: var(--efgn-font-bold);
  line-height: 1.2;
  color: var(--efgn-blue-dark);
  margin-top: 0;
}

a {
  color: var(--efgn-blue-royal);
  text-decoration: none;
  transition: color var(--efgn-transition-fast);
}

a:hover {
  color: var(--efgn-blue-cian);
}

a:focus-visible {
  outline: 3px solid var(--efgn-blue-cian);
  outline-offset: 2px;
  border-radius: var(--efgn-radius-sm);
}

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

/* ─── Contenedor principal ───────────────────────────────────────────────── */
.efgn-container {
  width: 100%;
  max-width: var(--efgn-container-max);
  margin-inline: auto;
  padding-inline: var(--efgn-container-pad);
}

/* ─── Botones ────────────────────────────────────────────────────────────── */
.efgn-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--efgn-space-2);
  padding: 0.75rem 1.5rem;
  font-family: var(--efgn-font-heading);
  font-size: var(--efgn-text-sm);
  font-weight: var(--efgn-font-semibold);
  line-height: 1;
  border: 2px solid transparent;
  border-radius: var(--efgn-radius-md);
  cursor: pointer;
  transition: all var(--efgn-transition-base);
  text-decoration: none;
  white-space: nowrap;
  user-select: none;
}

.efgn-btn:focus-visible {
  outline: 3px solid var(--efgn-blue-cian);
  outline-offset: 2px;
}

.efgn-btn:disabled,
.efgn-btn[aria-disabled="true"] {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* Botón primario */
.efgn-btn--primary {
  background-color: var(--efgn-blue-royal);
  color: var(--efgn-white);
  border-color: var(--efgn-blue-royal);
}

.efgn-btn--primary:hover {
  background-color: var(--efgn-blue-dark);
  border-color: var(--efgn-blue-dark);
  color: var(--efgn-white);
  box-shadow: var(--efgn-shadow-blue);
  transform: translateY(-1px);
}

/* Botón secundario */
.efgn-btn--secondary {
  background-color: transparent;
  color: var(--efgn-blue-royal);
  border-color: var(--efgn-blue-royal);
}

.efgn-btn--secondary:hover {
  background-color: var(--efgn-blue-royal);
  color: var(--efgn-white);
}

/* Botón acento cian */
.efgn-btn--accent {
  background-color: var(--efgn-blue-cian);
  color: var(--efgn-blue-deeper);
  border-color: var(--efgn-blue-cian);
}

.efgn-btn--accent:hover {
  background-color: var(--efgn-blue-royal);
  border-color: var(--efgn-blue-royal);
  color: var(--efgn-white);
}

/* Tamaños */
.efgn-btn--sm {
  padding: 0.5rem 1rem;
  font-size: var(--efgn-text-xs);
}

.efgn-btn--lg {
  padding: 1rem 2rem;
  font-size: var(--efgn-text-base);
}

/* ─── Badges / etiquetas ─────────────────────────────────────────────────── */
.efgn-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.6rem;
  font-family: var(--efgn-font-heading);
  font-size: var(--efgn-text-xs);
  font-weight: var(--efgn-font-semibold);
  border-radius: var(--efgn-radius-full);
  line-height: 1.4;
}

.efgn-badge--sale    { background: var(--efgn-error);   color: var(--efgn-white); }
.efgn-badge--new     { background: var(--efgn-blue-cian); color: var(--efgn-blue-deeper); }
.efgn-badge--stock   { background: var(--efgn-success-bg); color: var(--efgn-success); }
.efgn-badge--out     { background: var(--efgn-gray-200); color: var(--efgn-gray-600); }
.efgn-badge--featured{ background: var(--efgn-blue-royal); color: var(--efgn-white); }

/* ─── Tarjetas ───────────────────────────────────────────────────────────── */
.efgn-card {
  background: var(--efgn-white);
  border: 1px solid var(--efgn-gray-200);
  border-radius: var(--efgn-radius-lg);
  overflow: hidden;
  transition: box-shadow var(--efgn-transition-base), transform var(--efgn-transition-base);
}

.efgn-card:hover {
  box-shadow: var(--efgn-shadow-lg);
  transform: translateY(-2px);
}

/* ─── Formularios ────────────────────────────────────────────────────────── */
.efgn-input,
.efgn-select,
.efgn-textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  font-family: var(--efgn-font-body);
  font-size: var(--efgn-text-base);
  color: var(--efgn-gray-800);
  background-color: var(--efgn-white);
  border: 2px solid var(--efgn-gray-300);
  border-radius: var(--efgn-radius-md);
  transition: border-color var(--efgn-transition-fast), box-shadow var(--efgn-transition-fast);
  appearance: none;
}

.efgn-input:focus,
.efgn-select:focus,
.efgn-textarea:focus {
  outline: none;
  border-color: var(--efgn-blue-royal);
  box-shadow: 0 0 0 3px rgba(0,87,184,0.15);
}

.efgn-input--error,
.efgn-select--error {
  border-color: var(--efgn-error);
}

.efgn-input--error:focus {
  box-shadow: 0 0 0 3px rgba(220,38,38,0.15);
}

.efgn-label {
  display: block;
  font-family: var(--efgn-font-heading);
  font-size: var(--efgn-text-sm);
  font-weight: var(--efgn-font-semibold);
  color: var(--efgn-gray-700);
  margin-bottom: var(--efgn-space-2);
}

.efgn-field-error {
  display: block;
  font-size: var(--efgn-text-sm);
  color: var(--efgn-error);
  margin-top: var(--efgn-space-1);
}

/* ─── Alertas ────────────────────────────────────────────────────────────── */
.efgn-alert {
  display: flex;
  align-items: flex-start;
  gap: var(--efgn-space-3);
  padding: var(--efgn-space-4);
  border-radius: var(--efgn-radius-md);
  font-size: var(--efgn-text-sm);
  border-left: 4px solid;
}

.efgn-alert--success { background: var(--efgn-success-bg); border-color: var(--efgn-success); color: #14532D; }
.efgn-alert--warning { background: var(--efgn-warning-bg); border-color: var(--efgn-warning); color: #78350F; }
.efgn-alert--error   { background: var(--efgn-error-bg);   border-color: var(--efgn-error);   color: #7F1D1D; }
.efgn-alert--info    { background: var(--efgn-info-bg);    border-color: var(--efgn-info);    color: #0C4A6E; }

/* ─── Utilidades ─────────────────────────────────────────────────────────── */
.efgn-sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

.efgn-text-center { text-align: center; }
.efgn-text-right  { text-align: right; }

.efgn-flex        { display: flex; }
.efgn-flex-center { display: flex; align-items: center; justify-content: center; }
.efgn-flex-between{ display: flex; align-items: center; justify-content: space-between; }

.efgn-grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--efgn-space-6); }
.efgn-grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--efgn-space-6); }
.efgn-grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--efgn-space-6); }

@media (max-width: 1024px) {
  .efgn-grid-4 { grid-template-columns: repeat(2, 1fr); }
  .efgn-grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .efgn-grid-4,
  .efgn-grid-3,
  .efgn-grid-2 { grid-template-columns: 1fr; }
  :root { --efgn-container-pad: 1rem; }
}

/* ─── Skeleton loader ────────────────────────────────────────────────────── */
.efgn-skeleton {
  background: linear-gradient(90deg, var(--efgn-gray-100) 25%, var(--efgn-gray-200) 50%, var(--efgn-gray-100) 75%);
  background-size: 200% 100%;
  animation: efgn-shimmer 1.5s infinite;
  border-radius: var(--efgn-radius-md);
}

@keyframes efgn-shimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}