/* ============================================
   Samarkand Stone Trading Corporation
   Design: Luxury Minimalism (barmat.pt inspired)
   Fonts: Playfair Display + Inter
   ============================================ */

/* --- Reset & Base --- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: #fafaf8;
  color: #2d2d2d;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* --- Design Tokens --- */
:root {
  --color-bg: #fafaf8;
  --color-text: #2d2d2d;
  --color-text-light: #6b6b6b;
  --color-text-muted: #999;
  --color-accent: #8b7355;
  --color-accent-light: #a0896b;
  --color-border: #e5e3db;
  --color-footer-bg: #1a1a1a;
  --color-footer-text: #b0b0b0;
  --color-footer-heading: #e8e8e8;
  --font-heading: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --letter-spacing-wide: 0.08em;
  --letter-spacing-wider: 0.15em;
  --letter-spacing-widest: 0.25em;
  --nav-height: 72px;
  --max-width: 1200px;
  --transition-speed: 0.4s;
}

/* --- Typography --- */
h1, h2, h3, h4 { font-family: var(--font-heading); font-weight: 400; }
h1 { font-size: clamp(2.2rem, 5vw, 4rem); line-height: 1.15; letter-spacing: var(--letter-spacing-wide); }
h2 { font-size: clamp(1.6rem, 3vw, 2.5rem); letter-spacing: var(--letter-spacing-wider); text-transform: uppercase; }
h3 { font-size: clamp(1.2rem, 2vw, 1.6rem); letter-spacing: 0.05em; }
p { font-size: 1rem; line-height: 1.8; color: var(--color-text-light); }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 clamp(1rem, 3vw, 2.5rem);
}

/* --- Navigation --- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(250, 250, 248, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(1.5rem, 4vw, 3rem);
}
.nav-logo {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-style: italic;
  letter-spacing: 0.03em;
  color: var(--color-text);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
}
.nav-logo img {
  height: 67px;
  width: auto;
  display: block;
  border-radius: 2px;
}
.nav-menu {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 0;
}
.nav-menu > li { position: relative; }
.nav-menu > li > a {
  display: block;
  padding: 0 1.1rem;
  font-size: 0.75rem;
  letter-spacing: var(--letter-spacing-wider);
  text-transform: uppercase;
  color: var(--color-text);
  line-height: var(--nav-height);
  transition: color var(--transition-speed);
  white-space: nowrap;
}
.nav-menu > li > a:hover,
.nav-menu > li > a.active { color: var(--color-accent); }
.nav-menu > li > a.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 1.1rem;
  right: 1.1rem;
  height: 2px;
  background: var(--color-accent);
}

/* --- Dropdown --- */
.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  background: rgba(250, 250, 248, 0.98);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  min-width: 200px;
  border: 1px solid var(--color-border);
  border-top: 2px solid var(--color-accent);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: all 0.25s ease;
  list-style: none;
  z-index: 100;
}
.nav-menu > li:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.dropdown-menu li a {
  display: block;
  padding: 0.75rem 1.5rem;
  font-size: 0.8125rem;
  letter-spacing: 0.05em;
  color: var(--color-text);
  transition: all 0.2s;
  border-bottom: 1px solid var(--color-border);
}
.dropdown-menu li:last-child a { border-bottom: none; }
.dropdown-menu li a:hover {
  background: var(--color-accent);
  color: #fff;
  padding-left: 2rem;
}

/* --- Nav Toggle (Mobile) --- */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  z-index: 1001;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  margin: 5px 0;
  transition: all 0.3s;
}

/* --- Hero / Home Slideshow --- */
.hero-section {
  height: 100vh;
  position: relative;
  overflow: hidden;
  margin-top: 0;
}
.hero-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0,0,0,0.15) 0%, rgba(0,0,0,0.45) 100%);
  z-index: 2;
  pointer-events: none;
}
.hero-content {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 3;
  text-align: center;
  color: #fff;
  pointer-events: none;
}
.hero-content h1 {
  font-size: clamp(2rem, 5vw, 4rem);
  margin-bottom: 0.5rem;
  text-shadow: 0 2px 20px rgba(0,0,0,0.3);
}
.hero-content p {
  font-size: clamp(0.85rem, 1.5vw, 1.05rem);
  letter-spacing: var(--letter-spacing-wider);
  text-transform: uppercase;
  color: rgba(255,255,255,0.8);
  text-shadow: 0 1px 10px rgba(0,0,0,0.3);
}
.scroll-indicator {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  color: rgba(255,255,255,0.7);
  font-size: 0.7rem;
  letter-spacing: var(--letter-spacing-widest);
  text-transform: uppercase;
  animation: bounce 2s infinite;
  cursor: pointer;
}
@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* --- Project Slideshow --- */
.project-slideshow {
  position: relative;
  width: 100%;
  height: calc(100vh - var(--nav-height));
  min-height: 500px;
  overflow: hidden;
  background: #111;
}
.project-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 1.2s ease;
  will-change: opacity;
}
.project-slide.active {
  opacity: 1;
}
.project-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.project-slide .slide-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(0deg, rgba(0,0,0,0.6) 0%, transparent 50%);
}
.project-slide .project-label {
  position: absolute;
  bottom: 4rem;
  left: 3rem;
  right: 3rem;
  z-index: 2;
}
.project-slide .project-label h3 {
  font-family: var(--font-heading);
  font-size: clamp(1.4rem, 3vw, 2.2rem);
  color: #fff;
  font-weight: 400;
  letter-spacing: 0.04em;
  text-shadow: 0 2px 12px rgba(0,0,0,0.5);
}
.project-slide .project-label span {
  display: block;
  font-size: 0.8rem;
  letter-spacing: var(--letter-spacing-wider);
  text-transform: uppercase;
  color: rgba(255,255,255,0.7);
  margin-top: 0.5rem;
}

/* Slideshow Navigation Dots */
.slideshow-dots {
  position: absolute;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 5;
  display: flex;
  gap: 0.6rem;
}
.slideshow-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 2px solid rgba(255,255,255,0.7);
  background: transparent;
  cursor: pointer;
  transition: all 0.3s;
}
.slideshow-dot.active {
  background: #fff;
  border-color: #fff;
}

/* --- Page Section --- */
.page-section {
  min-height: 60vh;
  padding: 6rem 0 4rem;
}
.page-section.alt-bg {
  background: #f5f4f0;
}
.section-header {
  text-align: center;
  margin-bottom: 3.5rem;
  padding-top: 2rem;
}
.section-header h2 {
  position: relative;
  display: inline-block;
  margin-bottom: 0.75rem;
}
.section-header h2::after {
  content: '';
  display: block;
  width: 40px;
  height: 2px;
  background: var(--color-accent);
  margin: 1rem auto 0;
}
.section-header p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  letter-spacing: var(--letter-spacing-wider);
  text-transform: uppercase;
  margin-top: 0.75rem;
}
.back-link {
  display: inline-block;
  margin-bottom: 1.5rem;
  font-size: 0.8rem;
  letter-spacing: var(--letter-spacing-wider);
  text-transform: uppercase;
  color: var(--color-accent);
  transition: color 0.2s;
}
.back-link:hover { color: var(--color-text); }

/* --- About Section --- */
.about-text {
  max-width: 860px;
  margin: 0 auto;
}
.about-text p {
  margin-bottom: 1.2rem;
  font-size: 1rem;
  line-height: 1.9;
  color: var(--color-text-light);
}
.about-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
  text-align: center;
}
.stat-card {
  padding: 2rem 1.5rem;
  border: 1px solid var(--color-border);
}
.stat-card h3 {
  font-family: var(--font-heading);
  font-size: 2rem;
  color: var(--color-accent);
  margin-bottom: 0.5rem;
}
.stat-card p {
  font-size: 0.85rem;
  letter-spacing: var(--letter-spacing-wider);
  text-transform: uppercase;
  color: var(--color-text-muted);
}

/* --- Product Grid (Categories) --- */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2px;
  max-width: var(--max-width);
  margin: 0 auto;
}
.product-card {
  position: relative;
  overflow: hidden;
  aspect-ratio: 4/3;
  cursor: pointer;
}
.product-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}
.product-card:hover img { transform: scale(1.06); }
.product-card .card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(0deg, rgba(0,0,0,0.65) 0%, transparent 50%);
  transition: opacity 0.3s;
}
.product-card .card-label {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 2rem 1.5rem 1.5rem;
  z-index: 2;
}
.product-card .card-label h3 {
  font-family: var(--font-heading);
  color: #fff;
  font-size: 1.2rem;
  margin-bottom: 0.25rem;
}
.product-card .card-label span {
  font-size: 0.75rem;
  letter-spacing: var(--letter-spacing-wider);
  text-transform: uppercase;
  color: rgba(255,255,255,0.7);
}

/* --- Gallery Grid (images) --- */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 3px;
}
.gallery-item {
  overflow: hidden;
  cursor: pointer;
  position: relative;
}
.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
  display: block;
}
.gallery-item:hover img { transform: scale(1.05); }
.gallery-item .gallery-count {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: rgba(0,0,0,0.5);
  color: #fff;
  font-size: 0.75rem;
  padding: 0.25rem 0.6rem;
  letter-spacing: 0.05em;
}

/* --- Lightbox --- */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.92);
  z-index: 2000;
  display: none;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}
.lightbox.open { display: flex; }
.lightbox img {
  max-width: 90vw;
  max-height: 90vh;
  object-fit: contain;
  border-radius: 2px;
}
.lightbox-close {
  position: absolute;
  top: 1.5rem;
  right: 2rem;
  color: #fff;
  font-size: 2rem;
  cursor: pointer;
  background: none;
  border: none;
  opacity: 0.7;
  transition: opacity 0.2s;
  line-height: 1;
}
.lightbox-close:hover { opacity: 1; }
.lightbox-prev,
.lightbox-next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  color: #fff;
  font-size: 2.5rem;
  cursor: pointer;
  background: none;
  border: none;
  padding: 1rem;
  opacity: 0.5;
  transition: opacity 0.2s;
}
.lightbox-prev:hover,
.lightbox-next:hover { opacity: 1; }
.lightbox-prev { left: 1rem; }
.lightbox-next { right: 1rem; }
.lightbox-counter {
  position: absolute;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  color: rgba(255,255,255,0.6);
  font-size: 0.85rem;
  letter-spacing: 0.1em;
}

/* --- Contact Section --- */
.contact-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  max-width: var(--max-width);
  margin: 0 auto;
}
.contact-info h3 {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  margin-bottom: 1.5rem;
}
.contact-info p {
  margin-bottom: 0.75rem;
  font-size: 0.95rem;
}
.contact-info a {
  color: var(--color-accent);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s;
}
.contact-info a:hover { border-color: var(--color-accent); }
.contact-info .contact-detail {
  margin-bottom: 1.5rem;
}
.contact-info .contact-detail strong {
  display: block;
  font-size: 0.75rem;
  letter-spacing: var(--letter-spacing-wider);
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: 0.25rem;
}
.contact-form label {
  display: block;
  font-size: 0.75rem;
  letter-spacing: var(--letter-spacing-wider);
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: 0.4rem;
}
.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 0.875rem 0;
  border: none;
  border-bottom: 1px solid var(--color-border);
  background: transparent;
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--color-text);
  outline: none;
  transition: border-color 0.3s;
  margin-bottom: 1.5rem;
}
.contact-form input:focus,
.contact-form textarea:focus {
  border-color: var(--color-accent);
}
.contact-form textarea {
  min-height: 100px;
  resize: vertical;
}
.contact-form button {
  background: var(--color-text);
  color: #fff;
  border: none;
  padding: 0.875rem 2.5rem;
  font-family: var(--font-body);
  font-size: 0.75rem;
  letter-spacing: var(--letter-spacing-wider);
  text-transform: uppercase;
  cursor: pointer;
  transition: background 0.3s;
}
.contact-form button:hover { background: var(--color-accent); }
.form-success {
  display: none;
  color: var(--color-accent);
  font-size: 0.9rem;
  margin-top: 1rem;
}
.form-success.show { display: block; }

/* --- Footer --- */
.site-footer {
  background: var(--color-footer-bg);
  color: var(--color-footer-text);
  padding: 4rem 0 2rem;
  margin-top: 4rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 2.5rem;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 clamp(1rem, 3vw, 2.5rem);
}
.footer-col h4 {
  font-family: var(--font-heading);
  color: var(--color-footer-heading);
  font-size: 1.1rem;
  margin-bottom: 1rem;
}
.footer-col p,
.footer-col a {
  font-size: 0.875rem;
  line-height: 1.8;
  color: var(--color-footer-text);
}
.footer-col a:hover { color: #fff; }
.footer-col a svg {
  vertical-align: middle;
  margin-right: 6px;
  flex-shrink: 0;
}
.footer-col a[href^="mailto:"] {
  display: inline-flex;
  align-items: center;
}
.footer-col p a[href*="instagram"],
.footer-col p a[href*="t.me"] {
  display: inline-flex;
  align-items: center;
}
.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  margin-top: 2rem;
  border-top: 1px solid rgba(255,255,255,0.08);
  font-size: 0.8rem;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: clamp(1rem, 3vw, 2.5rem);
  padding-right: clamp(1rem, 3vw, 2.5rem);
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .nav-toggle { display: block; }
  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    height: 100vh;
    background: rgba(250, 250, 248, 0.98);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    transition: right 0.4s ease;
  }
  .nav-menu.open { right: 0; }
  .nav-menu > li > a {
    font-size: 1rem;
    padding: 0.75rem 0;
    line-height: 1.5;
  }
  .nav-menu > li > a.active::after { display: none; }
  .dropdown-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    border: none;
    background: transparent;
    text-align: center;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s;
  }
  .dropdown.open .dropdown-menu { max-height: 300px; }
  .dropdown-menu li a {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
    border-bottom: none;
  }
  .dropdown-menu li a:hover {
    background: transparent;
    color: var(--color-accent);
    padding-left: 1rem;
  }

  .project-slide .project-label {
    bottom: 2rem;
    left: 1.5rem;
    right: 1.5rem;
  }

  .contact-section {
    grid-template-columns: 1fr;
  }

  .gallery-grid {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  }

  .product-grid {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  }

  .page-section {
    padding: 5rem 0 3rem;
  }
}
@media (max-width: 480px) {
  .gallery-grid { grid-template-columns: 1fr 1fr; gap: 2px; }
  .product-grid { grid-template-columns: 1fr 1fr; gap: 2px; }
  .product-card .card-label h3 { font-size: 1rem; }
  .product-card .card-label { padding: 1.5rem 1rem 1rem; }
}

/* --- Fade In Animation --- */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}