/* ==========================================================================
   ESTILO PREMIUM – INSPIRADO EN MUNDOMARMOL.CL
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Cairo:wght@300;400;600;700&family=Josefin+Sans:wght@300;400;600;700&display=swap');

:root {
  /* Paleta Minimalista de Alta Gama */
  --bg-primary: #ffffff;
  --bg-secondary: #fafafa;
  --text-primary: #1c1c1c;
  --text-secondary: #777777;
  --border-color: #eaeaea;
  
  --btn-bg: #1c1c1c;
  --btn-text: #ffffff;
  --btn-border: #1c1c1c;
  
  --footer-bg: #241f1f;
  --footer-text: #cccccc;
  
  --font-title: 'Josefin Sans', sans-serif;
  --font-body: 'Cairo', sans-serif;
}

/* Reseteo general */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.8;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.3s ease;
}

/* ==========================================================================
   HEADER / NAVEGACIÓN
   ========================================================================== */
header.site-header {
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  padding: 1.5rem 3rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 10px rgba(0,0,0,0.02);
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 1rem;
}

header.site-header .logo {
  max-height: 60px;
  width: auto;
  object-fit: contain;
}

header.site-header h1 {
  font-family: var(--font-title);
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-primary);
}

nav.main-nav ul {
  list-style: none;
  display: flex;
  gap: 2.5rem;
}

nav.main-nav a {
  font-family: var(--font-title);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--text-primary);
  padding: 0.5rem 0;
  position: relative;
}

nav.main-nav a::after {
  content: '';
  position: absolute;
  width: 0;
  height: 1px;
  bottom: 0;
  left: 0;
  background-color: var(--text-primary);
  transition: width 0.3s ease;
}

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

/* Contenido Principal */
.main-content {
  flex: 1;
  padding: 0; /* Controlado por secciones */
}

/* ==========================================================================
   HERO / BANNER PRINCIPAL
   ========================================================================== */
.hero {
  position: relative;
  height: 80vh;
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.45);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem;
  z-index: 1;
}

.hero h1 {
  font-family: var(--font-title);
  font-size: 3.5rem;
  font-weight: 300;
  text-transform: uppercase;
  letter-spacing: 0.2rem;
  margin-bottom: 2rem;
  max-width: 900px;
  line-height: 1.2;
  animation: fadeInUp 1s ease;
}

/* ==========================================================================
   BOTONES Y ELEMENTOS DE LLAMADO A LA ACCIÓN (CTA)
   ========================================================================== */
.cta-button {
  display: inline-block;
  background-color: var(--btn-bg);
  color: var(--btn-text);
  border: 1px solid var(--btn-border);
  padding: 1rem 2.5rem;
  font-family: var(--font-title);
  font-size: 0.9rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  transition: all 0.4s ease;
  cursor: pointer;
  animation: fadeInUp 1.2s ease;
}

.cta-button:hover {
  background-color: transparent;
  color: var(--text-primary);
  border-color: var(--text-primary);
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}

/* ==========================================================================
   SECCIONES Y DISEÑO DE CONTENIDO
   ========================================================================== */
section {
  padding: 6rem 10%;
}

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

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-header h2 {
  font-family: var(--font-title);
  font-size: 2.2rem;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--text-primary);
  margin-bottom: 1rem;
  position: relative;
  display: inline-block;
  padding-bottom: 1rem;
}

.section-header-logo {
  display: block;
  margin: 1.5rem auto 1.5rem;
  width: 160px; /* Logo mucho más grande */
  height: auto;
}

.section-header p {
  color: var(--text-secondary);
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto;
}

/* Sección Sobre Nosotros */
.about-section-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.about-section-content p {
  margin-bottom: 1.5rem;
  color: var(--text-secondary);
  font-size: 1.15rem;
}

/* ==========================================================================
   GALERÍA DE MUESTRAS Y PROYECTOS (ESTILO MUNDO MÁRMOL)
   ========================================================================== */
.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 2.5rem;
}

.gallery-item {
  position: relative;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  overflow: hidden;
  transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.gallery-item .img-container {
  width: 100%;
  aspect-ratio: 4/3;
  overflow: hidden;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.gallery-item:hover img {
  transform: scale(1.08);
}

.gallery-info {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(28, 28, 28, 0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.4s ease;
  padding: 2rem;
  text-align: center;
  border-top: none;
}

.gallery-item:hover .gallery-info {
  opacity: 1;
}

.gallery-info h3 {
  font-family: var(--font-title);
  font-size: 1.1rem;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: #ffffff;
  transform: translateY(20px);
  transition: transform 0.4s ease;
}

.gallery-item:hover .gallery-info h3 {
  transform: translateY(0);
}

/* ==========================================================================
   CONTACT FORM & CONTACT PAGE
   ========================================================================== */
.contact-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

@media (max-width: 768px) {
  .contact-container {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
}

.contact-info-block {
  padding-right: 2rem;
}

.contact-info-block h3 {
  font-family: var(--font-title);
  font-size: 1.5rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 1.5rem;
}

.contact-info-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
  font-size: 1.1rem;
}

.contact-form {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 3rem;
}

.contact-form h3 {
  font-family: var(--font-title);
  font-size: 1.5rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 2rem;
  text-align: center;
}

.form-group {
  margin-bottom: 2rem;
  position: relative;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 0.8rem 0.5rem;
  background: transparent;
  border: none;
  border-bottom: 1px solid #cccccc;
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--text-primary);
  transition: border-color 0.3s ease;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--text-primary);
}

.contact-form button[type="submit"] {
  width: 100%;
  background-color: var(--btn-bg);
  color: var(--btn-text);
  border: 1px solid var(--btn-border);
  padding: 1rem;
  font-family: var(--font-title);
  font-size: 0.95rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  cursor: pointer;
  transition: all 0.4s ease;
  margin-top: 1rem;
}

.contact-form button[type="submit"]:hover {
  background-color: transparent;
  color: var(--text-primary);
  border-color: var(--text-primary);
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
footer {
  background-color: var(--footer-bg);
  color: var(--footer-text);
  padding: 4rem 10% 2rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  border-top: 5px solid #1c1c1c;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid #333333;
}

.footer-contact {
  display: flex;
  gap: 2.5rem;
}

.footer-contact a {
  color: var(--footer-text);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

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

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  font-size: 0.85rem;
  color: #666666;
}

/* ==========================================================================
   WHATSAPP FLOTANTE
   ========================================================================== */
.floating-whatsapp {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 60px;
  height: 60px;
  background-color: #25D366;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 15px rgba(0,0,0,0.2);
  cursor: pointer;
  z-index: 1000;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.floating-whatsapp i {
  font-size: 32px;
  color: #ffffff;
}

.floating-whatsapp:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 20px rgba(0,0,0,0.3);
}

/* ==========================================================================
   ANIMACIONES
   ========================================================================== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Responsividad */
@media (max-width: 992px) {
  header.site-header {
    padding: 1.2rem 2rem;
  }
  .hero h1 {
    font-size: 2.5rem;
  }
  section {
    padding: 4rem 5%;
  }
}

@media (max-width: 768px) {
  header.site-header {
    flex-direction: column;
    gap: 1rem;
    padding: 1rem;
  }
  nav.main-nav ul {
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
  }
  .footer-content {
    flex-direction: column;
    text-align: center;
  }
  .footer-contact {
    flex-direction: column;
    gap: 1rem;
  }
}

@media (max-width: 576px) {
  .hero h1 {
    font-size: 2rem;
  }
  .hero-overlay {
    padding: 1.5rem;
  }
  section {
    padding: 3rem 1.2rem;
  }
  .section-header h2 {
    font-size: 1.8rem;
  }
  .section-header-logo {
    width: 120px;
    margin: 1rem auto;
  }
  .gallery {
    grid-template-columns: repeat(auto-fill, minmax(100%, 1fr));
    gap: 1.5rem;
  }
  .contact-container {
    gap: 2rem;
  }
  .contact-form {
    padding: 2rem 1.5rem;
  }
}

/* ==========================================================================
   BARRA DE FILTROS (MUESTRAS)
   ========================================================================== */
.filter-bar {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-bottom: 3.5rem;
  flex-wrap: wrap;
}

.filter-btn {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  padding: 0.75rem 2rem;
  font-family: var(--font-title);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  cursor: pointer;
  transition: all 0.3s ease;
}

.filter-btn:hover,
.filter-btn.active {
  background-color: var(--btn-bg);
  color: var(--btn-text);
  border-color: var(--btn-border);
}

/* Transiciones de filtrado en galería */
.gallery-item.fade-out {
  opacity: 0;
  transform: scale(0.9);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.gallery-item.hidden {
  display: none !important;
}

.gallery-item.fade-in-filter {
  animation: fadeInFilter 0.4s ease forwards;
}

@keyframes fadeInFilter {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* ==========================================================================
   SECCIÓN INTRODUCCIÓN CORPORATIVA
   ========================================================================== */
.corporate-intro {
  padding: 7rem 10%;
}

.intro-container {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 6rem;
  align-items: center;
}

@media (max-width: 992px) {
  .intro-container {
    grid-template-columns: 1fr;
    gap: 3.5rem;
  }
}

.intro-text-column {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.intro-badge {
  font-family: var(--font-title);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.25em;
  color: var(--text-secondary);
  margin-bottom: 1.2rem;
  display: inline-block;
}

.intro-text-column h2 {
  font-family: var(--font-title);
  font-size: 2.2rem;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
  line-height: 1.25;
}

.intro-text-column p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.9;
  margin-bottom: 2.5rem;
}

.intro-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem 2rem;
  margin-bottom: 0;
}

@media (max-width: 576px) {
  .intro-features {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
}

.feature-item {
  display: flex;
  gap: 0.85rem;
  align-items: start;
}

.feature-item i {
  font-size: 1.4rem;
  color: var(--text-primary);
  line-height: 1.3;
  flex-shrink: 0;
}

.feature-item h4 {
  font-family: var(--font-title);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-primary);
  margin-bottom: 0.3rem;
}

.feature-item p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 0;
}

.intro-image-column {
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: stretch;
}

.intro-img-wrapper {
  width: 100%;
  position: relative;
  overflow: hidden;
}

.intro-img {
  width: 100%;
  height: 520px;
  object-fit: cover;
  display: block;
  border: 1px solid var(--border-color);
  box-shadow: 8px 8px 0px var(--border-color);
  transition: transform 0.6s ease;
}

.intro-img:hover {
  transform: scale(1.02);
}

/* ==========================================================================
   LIGHTBOX PREMIUM
   ========================================================================== */
.lightbox {
  display: none;
  position: fixed;
  z-index: 2000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  overflow: auto;
  background-color: rgba(0, 0, 0, 0.9);
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.lightbox.active {
  display: flex;
  opacity: 1;
}

.lightbox-content {
  margin: auto;
  display: block;
  max-width: 85%;
  max-height: 85%;
  object-fit: contain;
  box-shadow: 0 10px 40px rgba(0,0,0,0.5);
  transform: scale(0.95);
  transition: transform 0.3s ease;
}

.lightbox.active .lightbox-content {
  transform: scale(1);
}

.lightbox-close {
  position: absolute;
  top: 30px;
  right: 40px;
  color: #f1f1f1;
  font-size: 40px;
  font-weight: 300;
  transition: 0.3s;
  cursor: pointer;
  user-select: none;
}

.lightbox-close:hover,
.lightbox-close:focus {
  color: #bbb;
  text-decoration: none;
}

.lightbox-caption {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  color: #ccc;
  font-family: var(--font-title);
  font-size: 0.9rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  text-align: center;
  width: 80%;
}