/* ============================================
   FabEx - Fabricaciones Exclusivas
   Modern responsive stylesheet
   ============================================ */

/* ---- Design Tokens ---- */
:root {
  --color-primary: #CC0000;
  --color-primary-dark: #990000;
  --color-primary-light: #FF3333;
  --color-accent: #FF6600;
  --color-text: #1a1a1a;
  --color-text-secondary: #555555;
  --color-text-muted: #888888;
  --color-bg: #ffffff;
  --color-bg-secondary: #f8f9fa;
  --color-bg-dark: #111111;
  --color-border: #e5e5e5;
  --color-shadow: rgba(0, 0, 0, 0.08);
  --color-shadow-hover: rgba(0, 0, 0, 0.15);

  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 2rem;
  --font-size-3xl: 2.5rem;
  --font-size-4xl: 3rem;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;

  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;

  --shadow-sm: 0 1px 2px 0 var(--color-shadow);
  --shadow-md: 0 4px 6px -1px var(--color-shadow), 0 2px 4px -2px var(--color-shadow);
  --shadow-lg: 0 10px 15px -3px var(--color-shadow), 0 4px 6px -4px var(--color-shadow);
  --shadow-xl: 0 20px 25px -5px var(--color-shadow-hover), 0 8px 10px -6px var(--color-shadow-hover);

  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 350ms ease;

  --container-max: 1200px;
  --header-height: 64px;
}

/* ---- Reset & Base ---- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + var(--space-4));
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

a:hover {
  color: var(--color-primary-dark);
  text-decoration: underline;
}

/* ---- Utilities ---- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

@media (min-width: 768px) {
  .container {
    padding-inline: var(--space-6);
  }
}

@media (min-width: 1024px) {
  .container {
    padding-inline: var(--space-8);
  }
}

.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;
}

/* ---- Header ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
  height: var(--header-height);
  transition: box-shadow var(--transition-base);
}

.site-header.is-scrolled {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 800;
  font-size: var(--font-size-xl);
  color: var(--color-primary);
  text-decoration: none;
}

.logo:hover {
  text-decoration: none;
  color: var(--color-primary-dark);
}

.logo img {
  height: 82px;
  width: auto;
}

.logo span {
  display: none;
}

/* ---- Navigation ---- */
.main-nav {
  display: none;
}

@media (min-width: 768px) {
  .main-nav {
    display: flex;
    align-items: center;
    gap: var(--space-6);
  }
}

.main-nav a {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  text-decoration: none;
  padding: var(--space-2) 0;
  position: relative;
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: width var(--transition-base);
}

.main-nav a:hover,
.main-nav a:focus {
  color: var(--color-primary);
  text-decoration: none;
}

.main-nav a:hover::after,
.main-nav a:focus::after {
  width: 100%;
}

.nav-cta {
  display: none;
}

@media (min-width: 768px) {
  .nav-cta {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    background-color: #25D366;
    color: #ffffff;
    font-size: var(--font-size-sm);
    font-weight: 600;
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: background-color var(--transition-fast), transform var(--transition-fast);
  }

  .nav-cta:hover {
    background-color: #128C7E;
    color: #ffffff;
    text-decoration: none;
    transform: translateY(-1px);
  }
}

/* Mobile menu toggle */
.mobile-menu-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-text);
}

@media (min-width: 768px) {
  .mobile-menu-btn {
    display: none;
  }
}

.mobile-nav {
  display: none;
  position: absolute;
  top: var(--header-height);
  left: 0;
  right: 0;
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-4);
  box-shadow: var(--shadow-lg);
}

.mobile-nav.is-open {
  display: block;
}

.mobile-nav a {
  display: block;
  padding: var(--space-3) 0;
  font-size: var(--font-size-lg);
  font-weight: 500;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
}

.mobile-nav a:last-child {
  border-bottom: none;
}

/* ---- Hero ---- */
.hero {
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
  color: #ffffff;
  padding: var(--space-20) 0;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.3;
}

.hero::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(255,255,255,0.12) 0%, transparent 70%);
  transform: translate(-50%, -50%);
  pointer-events: none;
  z-index: 0;
}

.hero .container {
  position: relative;
  z-index: 1;
}

.hero-layout {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
}

.hero-content {
  max-width: 700px;
}

.hero-image {
  display: none;
  width: 320px;
  height: auto;
  border-radius: var(--radius-xl);
  background: #ffffff;
  padding: var(--space-4);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
  flex-shrink: 0;
}

@media (min-width: 768px) {
  .hero-image {
    display: block;
  }
}

@media (min-width: 1024px) {
  .hero-image {
    width: 360px;
  }
}

.hero h1 {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: var(--space-4);
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
}

@media (min-width: 768px) {
  .hero h1 {
    font-size: var(--font-size-4xl);
  }
}

.hero p {
  font-size: var(--font-size-lg);
  opacity: 0.9;
  margin-bottom: var(--space-8);
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--font-size-base);
  font-weight: 600;
  border-radius: var(--radius-md);
  text-decoration: none;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all var(--transition-fast);
}

.btn:hover {
  text-decoration: none;
  transform: translateY(-2px);
}

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

.btn-primary:hover {
  background-color: var(--color-bg-secondary);
  color: var(--color-primary-dark);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background-color: transparent;
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.5);
}

.btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.1);
  color: #ffffff;
  border-color: #ffffff;
}

.btn-whatsapp {
  background-color: #25D366;
  color: #ffffff;
}

.btn-whatsapp:hover {
  background-color: #128C7E;
  color: #ffffff;
}

/* ---- Sections ---- */
.section {
  padding: var(--space-20) 0;
}

.section-alt {
  background-color: var(--color-bg-secondary);
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-12);
  max-width: 640px;
  margin-inline: auto;
}

.section-header h2 {
  font-size: var(--font-size-2xl);
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: var(--space-4);
  position: relative;
  display: inline-block;
}

.section-header h2::after {
  content: '';
  display: block;
  width: 48px;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
  border-radius: 2px;
  margin: var(--space-3) auto 0;
}

.section-header p {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
}

/* ---- About / Company ---- */
.about-grid {
  display: grid;
  gap: var(--space-8);
}

@media (min-width: 768px) {
  .about-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.about-card {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
  position: relative;
  overflow: hidden;
}

.about-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, var(--color-primary), var(--color-primary-light));
  opacity: 0.7;
  transition: opacity var(--transition-base);
}

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

.about-card:hover::before {
  opacity: 1;
}

.about-card h3 {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}

.about-card p {
  color: var(--color-text-secondary);
  line-height: 1.8;
}

/* ---- Products ---- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  justify-content: center;
  margin-bottom: var(--space-8);
}

.filter-btn {
  padding: var(--space-3) var(--space-6);
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-text);
  background-color: var(--color-bg);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-xl);
  cursor: pointer;
  transition: all var(--transition-fast);
  letter-spacing: 0.02em;
  line-height: 1.4;
}

.filter-btn:hover {
  background-color: var(--color-bg-secondary);
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
}

.filter-btn.is-active {
  background-color: var(--color-primary);
  color: #ffffff;
  border-color: var(--color-primary);
  box-shadow: 0 4px 12px rgba(204, 0, 0, 0.3);
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--space-6);
}

@media (min-width: 640px) {
  .product-grid {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  }
}

@media (min-width: 1024px) {
  .product-grid {
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  }
}

.product-card {
  background-color: var(--color-bg);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  cursor: pointer;
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.product-card.is-hidden {
  display: none;
}

.product-image {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background-color: var(--color-bg-secondary);
}

.product-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(0deg, rgba(0,0,0,0.5) 0%, rgba(0,0,0,0) 50%);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.product-image .zoom-icon {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.8);
  width: 48px;
  height: 48px;
  background-color: rgba(255, 255, 255, 0.95);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: all var(--transition-base);
  z-index: 2;
}

.product-image .zoom-icon svg {
  width: 20px;
  height: 20px;
  color: var(--color-primary);
}

.product-card:hover .product-image::after {
  opacity: 1;
}

.product-card:hover .product-image .zoom-icon {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}

.product-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.product-card:hover .product-image img {
  transform: scale(1.08);
}

.product-info {
  padding: var(--space-4);
}

.product-category {
  display: inline-block;
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-primary);
  margin-bottom: var(--space-1);
}

.product-title {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-1);
  line-height: 1.4;
}

.product-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  line-height: 1.5;
}

/* ---- Lightbox ---- */
.lightbox {
  border: none;
  background: transparent;
  padding: 0;
  margin: auto;
}

.lightbox:not([open]) {
  display: none;
}

.lightbox[open] {
  display: flex;
  width: 100vw;
  height: 100vh;
  align-items: center;
  justify-content: center;
}

.lightbox::backdrop {
  background-color: rgba(0, 0, 0, 0.9);
  backdrop-filter: blur(4px);
}

.lightbox-inner {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
}

.lightbox img {
  max-width: 90vw;
  max-height: 80vh;
  object-fit: contain;
  border-radius: var(--radius-md);
  transition: opacity 200ms ease;
}

.lightbox-caption {
  margin-top: var(--space-4);
  color: #ffffff;
  font-size: var(--font-size-lg);
  text-align: center;
}

.lightbox-close {
  position: fixed;
  top: 1rem;
  right: 1rem;
  background: none;
  border: none;
  color: #ffffff;
  font-size: 2rem;
  cursor: pointer;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0.8;
  transition: opacity var(--transition-fast);
  z-index: 10;
}

.lightbox-close:hover {
  opacity: 1;
}

/* ---- Contact ---- */
.contact-grid {
  display: grid;
  gap: var(--space-8);
}

@media (min-width: 768px) {
  .contact-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.contact-card {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  padding: var(--space-6);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-base), border-color var(--transition-base);
  position: relative;
  overflow: hidden;
}

.contact-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, var(--color-primary), var(--color-primary-light));
  opacity: 0;
  transition: opacity var(--transition-base);
}

.contact-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary);
}

.contact-card:hover::before {
  opacity: 1;
}

.contact-icon {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-primary);
  color: #ffffff;
  border-radius: var(--radius-md);
  font-size: var(--font-size-xl);
}

.contact-info h3 {
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin-bottom: var(--space-1);
}

.contact-info p,
.contact-info a {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
}

.contact-info a:hover {
  color: var(--color-primary);
}

.contact-cta {
  margin-top: var(--space-12);
  text-align: center;
}

/* ---- Footer ---- */
.site-footer {
  background-color: var(--color-bg-dark);
  color: #9ca3af;
  padding: var(--space-16) 0 var(--space-8);
  position: relative;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary-dark), var(--color-primary), var(--color-primary-light));
}

.footer-grid {
  display: grid;
  gap: var(--space-8);
  margin-bottom: var(--space-8);
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr;
  }
}

.footer-brand {
  font-size: var(--font-size-xl);
  font-weight: 800;
  color: #ffffff;
  margin-bottom: var(--space-4);
}

.footer-about {
  line-height: 1.7;
  max-width: 320px;
}

.footer-title {
  font-size: var(--font-size-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #ffffff;
  margin-bottom: var(--space-4);
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: var(--space-2);
}

.footer-links a {
  color: #9ca3af;
  font-size: var(--font-size-sm);
}

.footer-links a:hover {
  color: #ffffff;
}

.footer-bottom {
  border-top: 1px solid #374151;
  padding-top: var(--space-6);
  text-align: center;
  font-size: var(--font-size-sm);
}

/* ---- WhatsApp Float ---- */
.whatsapp-float {
  position: fixed;
  bottom: var(--space-4);
  right: var(--space-4);
  z-index: 200;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  background-color: #25D366;
  color: #ffffff;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-xl);
  font-size: var(--font-size-sm);
  font-weight: 600;
  box-shadow: 0 4px 12px rgba(37, 211, 102, 0.35);
  text-decoration: none;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.whatsapp-float::before {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: calc(var(--radius-xl) + 4px);
  border: 2px solid #25D366;
  opacity: 0;
  animation: pulse-ring 2s ease-out infinite;
  pointer-events: none;
}

@keyframes pulse-ring {
  0% { transform: scale(1); opacity: 0.5; }
  100% { transform: scale(1.2); opacity: 0; }
}

.whatsapp-float:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 6px 20px rgba(37, 211, 102, 0.45);
  color: #ffffff;
  text-decoration: none;
}

.whatsapp-float svg {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}

@media (min-width: 768px) {
  .whatsapp-float {
    bottom: var(--space-6);
    right: var(--space-6);
  }
}

/* ---- Scroll to top ---- */
.scroll-top {
  position: fixed;
  bottom: var(--space-4);
  left: var(--space-4);
  z-index: 200;
  width: 44px;
  height: 44px;
  background-color: var(--color-bg);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-md);
}

.scroll-top.is-visible {
  opacity: 1;
  visibility: visible;
}

.scroll-top:hover {
  background-color: var(--color-primary);
  color: #ffffff;
  border-color: var(--color-primary);
}

@media (min-width: 768px) {
  .scroll-top {
    bottom: var(--space-6);
    left: var(--space-6);
  }
}

/* ---- Focus styles ---- */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ---- Reduced motion ---- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}