/* ============================================================
   ProductStyle.css — Centralized Stylesheet
   BNB Enterprises · North Indian Granites
   ============================================================ */

/* ========== GLOBAL VARIABLES ========== */
:root {
  --primary-blue: #2673B8;
  --background-base: #eeeeee;
  --surface-light: #F0F3F7;
  --accent-white: #F7F9FC;
  --text-primary: #1A2332;
  --text-body: #5A6B7F;
  --text-muted: #7A8A9E;
  --border-color: #D4DCE6;
  --border-light: #E3E9F0;
  --whatsapp-green: #25D366;

  /* Lightbox */
  --lb-bg: rgba(0, 0, 0, 0.93);
  --lb-control-bg: rgba(255, 255, 255, 0.12);
  --lb-control-hover: rgba(255, 255, 255, 0.25);
  --lb-control-size: 44px;
  --lb-radius: 50%;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: 'Montserrat', sans-serif;
  background: var(--background-base);
  color: var(--text-body);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ========== PAGE LOADER ========== */
.page-loader {
  position: fixed;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--surface-light);
  z-index: 9999;
  gap: 12px;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loader-logo {
  width: clamp(60px, 10vw, 80px);
  height: clamp(60px, 10vw, 80px);
  object-fit: contain;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1);    opacity: 1;    }
  50%       { transform: scale(1.05); opacity: 0.85; }
}

.loader-text {
  font-family: 'Montserrat', sans-serif;
  font-size: clamp(0.875rem, 1.5vw, 1.125rem);
  font-weight: 700;
  letter-spacing: clamp(2px, 0.5vw, 3px);
  color: var(--text-primary);
}

.loader-subtext {
  font-family: 'Raleway', sans-serif;
  font-size: clamp(0.625rem, 1vw, 0.75rem);
  font-weight: 500;
  letter-spacing: clamp(1px, 0.3vw, 2px);
  color: var(--primary-blue);
  text-transform: uppercase;
}

body.loaded .page-loader {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

/* ========== SITE WRAPPER ========== */
.site-wrapper {
  opacity: 0;
  transition: opacity 0.5s ease;
}

body.loaded .site-wrapper {
  opacity: 1;
}

/* ========== WHATSAPP FLOATING BUTTON ========== */
.whatsapp-float {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 52px;
  height: 52px;
  background: var(--whatsapp-green);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 3px 15px rgba(37, 211, 102, 0.25);
  z-index: 9998;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  text-decoration: none;
}

.whatsapp-float:hover {
  transform: scale(1.08) translateY(-2px);
  box-shadow: 0 6px 24px rgba(37, 211, 102, 0.4);
}

.whatsapp-float i {
  color: white;
  font-size: 26px;
}

.whatsapp-float::before {
  content: '';
  position: absolute;
  inset: -6px;
  border: 2px solid var(--whatsapp-green);
  border-radius: 50%;
  opacity: 0;
  animation: whatsapp-pulse 2s infinite;
}

@keyframes whatsapp-pulse {
  0%   { transform: scale(0.9); opacity: 0.8; }
  100% { transform: scale(1.3); opacity: 0;   }
}

/* ========== LAYOUT UTILITY ========== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 clamp(1rem, 3vw, 2rem);
}

section {
  scroll-margin-top: 80px;
}

/* ========== PRODUCT DETAIL SECTION ========== */
.product-detail-section {
  background: var(--background-base);
  padding: clamp(5rem, 6vw, 6rem) 0 clamp(2rem, 3vw, 2.5rem);
  min-height: 50vh;
}

/* ========== BREADCRUMB ========== */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
  font-family: 'Raleway', sans-serif;
  font-size: clamp(0.7rem, 0.85vw, 0.75rem);
  font-weight: 500;
  color: var(--text-muted);
  flex-wrap: wrap;
}

.breadcrumb a {
  color: var(--primary-blue);
  text-decoration: none;
  transition: opacity 0.3s ease;
}

.breadcrumb a:hover { opacity: 0.7; }

.breadcrumb span {
  color: var(--text-body);
  font-weight: 600;
}

/* ========== BACK BUTTON ========== */
.back-button {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1rem;
  margin-bottom: 1.5rem;
  background: var(--surface-light);
  border: 1px solid var(--border-color);
  color: var(--text-body);
  font-family: 'Montserrat', sans-serif;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.3s ease;
  border-radius: 4px;
}

.back-button i {
  font-size: 0.7rem;
  transition: transform 0.3s ease;
}

.back-button:hover {
  background: var(--text-primary);
  color: white;
  border-color: var(--text-primary);
  transform: translateX(-3px);
}

.back-button:hover i { transform: translateX(-3px); }

/* ========== PRODUCT LAYOUT ========== */
.product-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 3vw, 3rem);
  background: white;
  padding: clamp(1.5rem, 2.5vw, 2rem);
  border-radius: 8px;
  animation: fadeInUp 0.7s cubic-bezier(0.4, 0, 0.2, 1) 0.1s forwards;
  opacity: 0;
}

/* ========== PRODUCT GALLERY ========== */
.product-gallery {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.main-image-container {
  position: relative;
  width: 100%;
  padding-top: 100%;
  background: var(--border-light);
  border-radius: 6px;
  overflow: hidden;
  border: 1px solid var(--border-color);
  cursor: zoom-in; /* signals lightbox is available */
}

.main-image {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.main-image-container:hover .main-image { transform: scale(1.05); }

/* Zoom icon overlay */
.main-image-container::after {
  content: '\f00e'; /* fa-search-plus */
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  position: absolute;
  bottom: 10px;
  right: 10px;
  width: 32px;
  height: 32px;
  background: rgba(38, 115, 184, 0.85);
  color: white;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
  line-height: 32px;
  text-align: center;
}

.main-image-container:hover::after { opacity: 1; }

/* ========== THUMBNAIL GALLERY ========== */
.thumbnail-gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.6rem;
}

.thumbnail {
  position: relative;
  padding-top: 100%;
  background: var(--border-light);
  border-radius: 4px;
  overflow: hidden;
  border: 2px solid var(--border-color);
  cursor: pointer;
  transition: all 0.3s ease;
}

.thumbnail.active {
  border-color: var(--primary-blue);
  box-shadow: 0 0 0 2px rgba(38, 115, 184, 0.2);
}

.thumbnail:hover {
  border-color: var(--primary-blue);
  transform: translateY(-2px);
}

.thumbnail img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ========== PRODUCT INFO ========== */
.product-info {
  display: flex;
  flex-direction: column;
  gap: clamp(1.2rem, 1.8vw, 1.5rem);
}

.product-title {
  font-family: 'Montserrat', sans-serif;
  font-size: clamp(1.4rem, 2.2vw, 1.8rem);
  font-weight: 900;
  letter-spacing: -0.3px;
  color: var(--text-primary);
  line-height: 1.2;
  margin-bottom: 0.3rem;
}

.product-subtitle {
  font-family: 'Raleway', sans-serif;
  font-size: clamp(0.8rem, 1vw, 0.88rem);
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.2px;
}

/* ========== SPECIFICATIONS TABLE ========== */
.specifications {
  width: 100%;
  border-collapse: collapse;
  background: var(--surface-light);
  border-radius: 6px;
  overflow: hidden;
  border: 1px solid var(--border-color);
}

.specifications tr { border-bottom: 1px solid var(--border-color); }
.specifications tr:last-child { border-bottom: none; }

.specifications td {
  padding: 0.7rem 0.9rem;
  font-family: 'Raleway', sans-serif;
  font-size: 0.75rem;
}

.specifications td:first-child {
  font-weight: 700;
  color: var(--text-primary);
  text-transform: uppercase;
  font-size: 0.68rem;
  letter-spacing: 0.6px;
  width: 35%;
  background: rgba(38, 115, 184, 0.05);
}

.specifications td:last-child {
  font-weight: 500;
  color: var(--text-body);
  letter-spacing: 0.1px;
}

/* ========== PRODUCT DESCRIPTION ========== */
.product-description {
  background: var(--surface-light);
  border-radius: 6px;
  padding: 1rem 1.2rem;
}

.description-title {
  font-family: 'Montserrat', sans-serif;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  color: var(--text-primary);
  margin-bottom: 0.6rem;
}

.description-text {
  font-family: 'Raleway', sans-serif;
  font-size: 0.82rem;
  font-weight: 400;
  line-height: 1.6;
  color: var(--text-body);
  letter-spacing: 0.1px;
}

/* ========== ACTION BUTTONS ========== */
.product-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.8rem;
  margin-top: auto;
}

.action-btn {
  padding: 0.85rem 1.2rem;
  font-family: 'Montserrat', sans-serif;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  border: 1px solid var(--border-color);
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  text-decoration: none;
  border-radius: 5px;
}

.action-btn i { font-size: 0.95rem; }

.call-btn {
  background: var(--surface-light);
  color: var(--text-body);
}

.call-btn:hover {
  background: var(--text-primary);
  color: white;
  border-color: var(--text-primary);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(26, 35, 50, 0.12);
}

.whatsapp-btn {
  background: var(--whatsapp-green);
  color: white;
  border-color: var(--whatsapp-green);
}

.whatsapp-btn:hover {
  background: #128C7E;
  border-color: #128C7E;
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(37, 211, 102, 0.25);
}

/* ========== WHY CHOOSE SECTION ========== */
.why-choose-section {
  background: white;
  padding: clamp(2.5rem, 4vw, 3.5rem) 0;
  border-top: 1px solid var(--border-color);
}

.why-choose-content { max-width: 1200px; margin: 0 auto; }

.why-choose-title {
  font-family: 'Montserrat', sans-serif;
  font-size: clamp(1.3rem, 2.2vw, 1.7rem);
  font-weight: 800;
  letter-spacing: -0.2px;
  color: var(--text-primary);
  line-height: 1.3;
  margin-bottom: clamp(1rem, 1.5vw, 1.2rem);
}

.why-choose-text {
  font-family: 'Raleway', sans-serif;
  font-size: clamp(0.85rem, 0.95vw, 0.88rem);
  font-weight: 400;
  line-height: 1.7;
  color: var(--text-body);
  margin-bottom: 0.9rem;
  text-align: justify;
}

.benefits-section { margin-top: clamp(1.5rem, 2.5vw, 2rem); }

.benefits-title {
  font-family: 'Montserrat', sans-serif;
  font-size: clamp(1rem, 1.3vw, 1.15rem);
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 0.8rem;
}

.benefits-list { list-style: none; padding-left: 0; }

.benefits-list li {
  font-family: 'Raleway', sans-serif;
  font-size: clamp(0.82rem, 0.92vw, 0.86rem);
  font-weight: 500;
  line-height: 1.6;
  color: var(--text-body);
  margin-bottom: 0.5rem;
  padding-left: 1.3rem;
  position: relative;
}

.benefits-list li::before {
  content: '•';
  color: var(--primary-blue);
  font-weight: 900;
  font-size: 1.2rem;
  position: absolute;
  left: 0;
  top: -2px;
}

/* ========== CONTACT SECTION ========== */
.contact-section {
  margin-top: clamp(1.5rem, 2.5vw, 2rem);
  padding: 1rem 1.2rem;
  background: var(--surface-light);
  border-radius: 6px;
  border: 1px solid var(--border-color);
}

.contact-title {
  font-family: 'Montserrat', sans-serif;
  font-size: clamp(0.95rem, 1.15vw, 1.05rem);
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 0.7rem;
}

.contact-text {
  font-family: 'Raleway', sans-serif;
  font-size: clamp(0.82rem, 0.92vw, 0.86rem);
  font-weight: 400;
  line-height: 1.6;
  color: var(--text-body);
  margin-bottom: 0.7rem;
}

.contact-info-item {
  font-family: 'Raleway', sans-serif;
  font-size: clamp(0.82rem, 0.92vw, 0.86rem);
  font-weight: 500;
  line-height: 1.5;
  color: var(--text-body);
  margin-bottom: 0.4rem;
}

.contact-info-item strong {
  font-weight: 700;
  color: var(--text-primary);
  margin-right: 0.3rem;
}

.contact-info-item a {
  color: var(--primary-blue);
  text-decoration: none;
  transition: opacity 0.3s ease;
}

.contact-info-item a:hover { opacity: 0.7; }

/* ========== FAQ SECTION ========== */
.faq-section { margin-top: clamp(2rem, 3vw, 2.5rem); }

.faq-title {
  font-family: 'Montserrat', sans-serif;
  font-size: clamp(1.2rem, 1.7vw, 1.45rem);
  font-weight: 800;
  letter-spacing: -0.2px;
  color: var(--text-primary);
  margin-bottom: clamp(1.2rem, 2vw, 1.5rem);
}

.faq-item { margin-bottom: clamp(1.2rem, 2vw, 1.5rem); }

.faq-question {
  font-family: 'Montserrat', sans-serif;
  font-size: clamp(0.92rem, 1.08vw, 1rem);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  line-height: 1.4;
}

.faq-answer {
  font-family: 'Raleway', sans-serif;
  font-size: clamp(0.82rem, 0.92vw, 0.86rem);
  font-weight: 400;
  line-height: 1.6;
  color: var(--text-body);
  padding-left: 0.4rem;
  text-align: justify;
}

/* ========== BEST SELLERS SECTION ========== */
.best-sellers-section {
  background: var(--background-base);
  padding: clamp(2.5rem, 4vw, 3.5rem) 0;
}

.section-header {
  text-align: center;
  margin-bottom: clamp(2rem, 3vw, 2.5rem);
}

.section-subtitle {
  font-family: 'Raleway', sans-serif;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 1.8px;
  text-transform: uppercase;
  color: var(--primary-blue);
  margin-bottom: 0.6rem;
}

.section-title {
  font-family: 'Montserrat', sans-serif;
  font-size: clamp(1.6rem, 2.8vw, 2.2rem);
  font-weight: 900;
  letter-spacing: -0.4px;
  color: var(--text-primary);
  line-height: 1.2;
}

.best-sellers-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(1.5rem, 2vw, 2rem);
  max-width: 1100px;
  margin: 0 auto;
}

.bestseller-card {
  background: white;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  overflow: hidden;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
  text-decoration: none;
  display: block;
  position: relative;
}

.bestseller-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--primary-blue);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 10;
}

.bestseller-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 50px rgba(26, 35, 50, 0.15);
  border-color: var(--primary-blue);
}

.bestseller-card:hover::before { transform: scaleX(1); }

.bestseller-image-container {
  position: relative;
  width: 100%;
  padding-top: 100%;
  overflow: hidden;
  background: var(--border-light);
}

.bestseller-image {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.bestseller-name {
  font-family: 'Montserrat', sans-serif;
  font-size: clamp(0.95rem, 1.1vw, 1.05rem);
  font-weight: 800;
  letter-spacing: 0.2px;
  color: var(--text-primary);
  text-align: center;
  padding: clamp(1.2rem, 1.5vw, 1.4rem);
  line-height: 1.3;
  transition: color 0.3s ease;
}

.bestseller-card:hover .bestseller-name { color: var(--primary-blue); }

/* ========== FOOTER COMPONENT ========== */
#footerComponent {
  font-family: 'Montserrat', sans-serif;
  width: 100%;
}

/* ================================================================
   LIGHTBOX
   Full-screen image viewer with pinch-zoom, swipe & keyboard nav
   ================================================================ */

.lightbox-overlay {
  position: fixed;
  inset: 0;
  background: var(--lb-bg);
  z-index: 99999;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.35s cubic-bezier(0.4, 0, 0.2, 1),
              visibility 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
}

.lightbox-overlay.active {
  opacity: 1;
  visibility: visible;
}

/* Prevent body scroll while lightbox open */
body.lightbox-open { overflow: hidden; }

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

/* Image wrapper — handles transform for zoom & drag */
.lightbox-image-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  overflow: hidden;
  cursor: grab;
}

.lightbox-image-wrapper.dragging { cursor: grabbing; }

.lightbox-image {
  max-width: 92vw;
  max-height: 88vh;
  object-fit: contain;
  border-radius: 4px;
  transform-origin: center center;
  transition: transform 0.25s ease;
  pointer-events: none;
  will-change: transform;
  display: block;
}

.lightbox-image.no-transition { transition: none; }

/* ---- Controls ---- */
.lightbox-close,
.lightbox-prev,
.lightbox-next {
  position: absolute;
  width: var(--lb-control-size);
  height: var(--lb-control-size);
  background: var(--lb-control-bg);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--lb-radius);
  color: white;
  font-size: 1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s ease, transform 0.2s ease;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 10;
}

.lightbox-close:hover,
.lightbox-prev:hover,
.lightbox-next:hover {
  background: var(--lb-control-hover);
  transform: scale(1.08);
}

.lightbox-close {
  top: 16px;
  right: 16px;
  font-size: 1.1rem;
}

.lightbox-prev {
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
}

.lightbox-prev:hover { transform: translateY(-50%) scale(1.08); }

.lightbox-next {
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
}

.lightbox-next:hover { transform: translateY(-50%) scale(1.08); }

/* hide nav if only 1 image */
.lightbox-overlay[data-count="1"] .lightbox-prev,
.lightbox-overlay[data-count="1"] .lightbox-next { display: none; }

/* ---- Counter ---- */
.lightbox-counter {
  position: absolute;
  bottom: 18px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0, 0, 0, 0.55);
  color: rgba(255, 255, 255, 0.9);
  font-family: 'Montserrat', sans-serif;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 1px;
  padding: 0.35rem 0.8rem;
  border-radius: 20px;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  pointer-events: none;
}

/* ---- Zoom hint ---- */
.lightbox-zoom-hint {
  position: absolute;
  bottom: 58px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(38, 115, 184, 0.75);
  color: white;
  font-family: 'Raleway', sans-serif;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  padding: 0.3rem 0.75rem;
  border-radius: 20px;
  pointer-events: none;
  opacity: 1;
  transition: opacity 0.5s ease;
  white-space: nowrap;
}

.lightbox-zoom-hint.hide { opacity: 0; }

/* ---- Zoom indicator badge ---- */
.lightbox-zoom-badge {
  position: absolute;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(38, 115, 184, 0.8);
  color: white;
  font-family: 'Montserrat', sans-serif;
  font-size: 0.68rem;
  font-weight: 700;
  padding: 0.25rem 0.65rem;
  border-radius: 20px;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s ease;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.lightbox-zoom-badge.visible { opacity: 1; }

/* ---- Thumbnail strip at bottom ---- */
.lightbox-thumbnails {
  position: absolute;
  bottom: 54px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
  padding: 6px 10px;
  background: rgba(0, 0, 0, 0.45);
  border-radius: 8px;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

.lightbox-thumb {
  width: 48px;
  height: 48px;
  border-radius: 4px;
  object-fit: cover;
  cursor: pointer;
  border: 2px solid transparent;
  opacity: 0.6;
  transition: all 0.25s ease;
}

.lightbox-thumb:hover   { opacity: 0.9; }
.lightbox-thumb.active  { border-color: var(--primary-blue); opacity: 1; }

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

.animate-on-scroll {
  opacity: 0;
  animation: fadeInUp 0.7s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

/* ================================================================
   RESPONSIVE DESIGN
   ================================================================ */
@media (max-width: 991px) {
  .product-detail-section { padding: 4.5rem 0 2rem; }

  .product-layout {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .specifications td:first-child { width: 40%; }

  .best-sellers-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }

  .lightbox-prev { left: 10px; }
  .lightbox-next { right: 10px; }
}

@media (max-width: 576px) {
  .product-layout { padding: 1.2rem; }
  .thumbnail-gallery { gap: 0.5rem; }

  .product-actions {
    grid-template-columns: 1fr;
    gap: 0.7rem;
  }

  .specifications td {
    font-size: 0.72rem;
    padding: 0.65rem 0.8rem;
  }

  .specifications td:first-child { font-size: 0.64rem; }

  .best-sellers-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
  }

  .whatsapp-float {
    width: 48px;
    height: 48px;
    bottom: 18px;
    right: 18px;
  }

  .whatsapp-float i { font-size: 24px; }

  .breadcrumb { font-size: 0.68rem; }

  .lightbox-image {
    max-width: 98vw;
    max-height: 80vh;
  }

  .lightbox-thumb { width: 38px; height: 38px; }

  .lightbox-close { top: 10px; right: 10px; }

  .lightbox-zoom-hint { font-size: 0.65rem; bottom: 96px; }
}