/* ============================================
   LUX Jeweler's – Premium Design System
   Black, Gold & Glass Aesthetic
   ============================================ */

:root {
  --lux-black: #050505;
  --lux-black-soft: #121212;
  --lux-gold: #d4af37;
  --lux-gold-light: #f1d592;
  --lux-gold-dim: #996515;
  --lux-white: #ffffff;
  --lux-gray: #888888;
  --lux-border: rgba(212, 175, 55, 0.2);
  --lux-glass: rgba(18, 18, 18, 0.85);
  
  --font-serif: 'Playfair Display', serif;
  --font-sans: 'Montserrat', sans-serif;
  
  --transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--lux-black);
  color: var(--lux-white);
  line-height: 1.6;
  overflow-x: hidden;
}

/* ─── Layout ─── */
.lux-app-container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.lux-main-content {
  display: grid;
  grid-template-columns: 1fr 380px;
  max-width: 1600px;
  margin: 0 auto;
  gap: 2rem;
  padding: 2rem;
}

@media (max-width: 1200px) {
  .lux-main-content {
    grid-template-columns: 1fr;
  }
  .lux-cart-sidebar {
    position: static !important;
    width: 100% !important;
  }
}

/* ─── Navigation ─── */
.lux-nav {
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 4rem;
  border-bottom: 1px solid var(--lux-border);
  position: sticky;
  top: 0;
  background: rgba(5, 5, 5, 0.95);
  backdrop-filter: blur(10px);
  z-index: 1000;
}

.lux-nav-title {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  font-weight: 400;
  letter-spacing: 0.05em;
  background: linear-gradient(to right, var(--lux-gold-light), #fff, var(--lux-gold-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-transform: capitalize;
}

.lux-back-link {
  color: var(--lux-gray);
  text-decoration: none;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: var(--transition);
}

.lux-back-link:hover {
  color: var(--lux-gold);
}

.lux-cart-trigger {
  color: var(--lux-white);
  text-decoration: none;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  border-bottom: 1px solid var(--lux-gold);
  padding-bottom: 2px;
}

/* ─── Hero ─── */
.lux-hero {
  height: 45vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: radial-gradient(circle at center, #1a1a1a 0%, #050505 100%);
  position: relative;
  overflow: hidden;
}

.lux-hero::before {
  content: '';
  position: absolute;
  width: 150%;
  height: 150%;
  background: url('https://www.transparenttextures.com/patterns/dark-matter.png');
  opacity: 0.2;
}

.lux-hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
  padding: 0 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.lux-hero-logo {
  height: 180px;
  margin-bottom: 2rem;
  filter: drop-shadow(0 4px 15px rgba(212, 175, 55, 0.4));
  animation: fadeInUp 1s forwards;
}

.lux-hero-overline {
  display: block;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.5em;
  color: var(--lux-gold);
  margin-bottom: 1rem;
  opacity: 0;
  animation: fadeInUp 1s forwards;
}

.lux-hero-title {
  font-family: var(--font-serif);
  font-size: 4.5rem;
  font-weight: 500;
  margin-bottom: 1.5rem;
  background: linear-gradient(to right, #fff, var(--lux-gold-light), #fff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: fadeInUp 1s 0.3s forwards;
  opacity: 0;
}

.lux-hero-description {
  font-size: 1.1rem;
  color: var(--lux-gray);
  letter-spacing: 0.05em;
  animation: fadeInUp 1s 0.6s forwards;
  opacity: 0;
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ─── Collection Header ─── */
.lux-collection-header {
  text-align: center;
  margin-bottom: 4rem;
}

.lux-collection-subtitle {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.3em;
  color: var(--lux-gold-dim);
}

.lux-collection-title {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  margin: 0.5rem 0 1.5rem;
}

.lux-collection-divider {
  width: 60px;
  height: 1px;
  background: var(--lux-gold);
  margin: 0 auto;
}

/* ─── Product Grid & Cards ─── */
.lux-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 3rem;
}

.lux-product-card {
  position: relative;
  transition: var(--transition);
}

.lux-product-image-container {
  position: relative;
  aspect-ratio: 1;
  overflow: hidden;
  background: #111;
  border-radius: 2px;
}

.lux-product-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 1s cubic-bezier(0.165, 0.84, 0.44, 1);
}

.lux-product-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: var(--transition);
}

.lux-product-card:hover .lux-product-overlay {
  opacity: 1;
}

.lux-product-card:hover .lux-product-img {
  transform: scale(1.1);
}

.btn-quick-add {
  background: var(--lux-white);
  color: var(--lux-black);
  border: none;
  padding: 1rem 2rem;
  font-family: var(--font-sans);
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  cursor: pointer;
  transform: translateY(20px);
  transition: var(--transition);
}

.lux-product-card:hover .btn-quick-add {
  transform: translateY(0);
}

.btn-quick-add:hover {
  background: var(--lux-gold);
  color: var(--lux-white);
}

.lux-product-info {
  padding: 1.5rem 0;
  text-align: center;
}

.lux-product-category {
  font-size: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--lux-gold);
  margin-bottom: 0.5rem;
  display: block;
}

.lux-product-name {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 400;
  margin-bottom: 0.5rem;
}

.lux-product-price {
  font-size: 0.9rem;
  color: var(--lux-gray);
  font-weight: 300;
}

/* ─── Sidebar Cart ─── */
.lux-cart-sidebar {
  position: sticky;
  top: 100px;
  height: calc(100vh - 120px);
}

.lux-cart-glass {
  background: var(--lux-glass);
  backdrop-filter: blur(20px);
  border: 1px solid var(--lux-border);
  border-radius: 8px;
  height: 100%;
  display: flex;
  flex-direction: column;
  padding: 2rem;
}

.lux-cart-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}

.lux-cart-header h3 {
  font-family: var(--font-serif);
  font-size: 1.5rem;
}

.lux-cart-count {
  font-size: 0.7rem;
  text-transform: uppercase;
  color: var(--lux-gray);
}

.lux-cart-items-list {
  flex: 1;
  overflow-y: auto;
  padding-right: 0.5rem;
}

.lux-cart-items-list::-webkit-scrollbar {
  width: 2px;
}

.lux-cart-items-list::-webkit-scrollbar-thumb {
  background: var(--lux-gold-dim);
}

.lux-cart-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  animation: fadeIn 0.5s ease;
}

.lux-cart-item-details {
  display: flex;
  flex-direction: column;
}

.lux-cart-item-name {
  font-size: 0.9rem;
  margin-bottom: 0.25rem;
}

.lux-cart-item-price {
  font-size: 0.8rem;
  color: var(--lux-gold);
}

.lux-cart-remove-btn {
  background: none;
  border: none;
  color: var(--lux-gray);
  cursor: pointer;
  transition: var(--transition);
}

.lux-cart-remove-btn:hover {
  color: #ff4d4d;
}

.lux-cart-empty {
  text-align: center;
  padding: 4rem 1rem;
  color: var(--lux-gray);
  font-size: 0.85rem;
  font-style: italic;
}

.lux-cart-footer {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255,255,255,0.05);
}

.lux-cart-total-row {
  display: flex;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  font-size: 1rem;
  font-weight: 600;
}

.lux-total-amount {
  color: var(--lux-gold-light);
  font-size: 1.2rem;
}

.btn-checkout {
  width: 100%;
  background: var(--lux-gold);
  color: var(--lux-white);
  border: none;
  padding: 1rem;
  font-family: var(--font-sans);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: var(--transition);
}

.btn-checkout:hover:not(:disabled) {
  background: var(--lux-gold-light);
  transform: translateY(-2px);
}

.btn-checkout:disabled {
  background: #333;
  cursor: not-allowed;
  opacity: 0.5;
}

/* ─── Artisan Section ─── */
.lux-artisan {
  padding: 10rem 2rem;
  background: #080808;
  text-align: center;
}

.lux-artisan-content {
  max-width: 700px;
  margin: 0 auto;
}

.lux-artisan-title {
  font-family: var(--font-serif);
  font-size: 2.8rem;
  margin-bottom: 2rem;
  font-style: italic;
}

.lux-artisan-text {
  font-size: 1.1rem;
  color: var(--lux-gray);
  line-height: 2;
  margin-bottom: 3rem;
}

.btn-artisan {
  display: inline-block;
  padding: 1rem 2.5rem;
  border: 1px solid var(--lux-gold);
  color: var(--lux-gold);
  text-decoration: none;
  text-transform: uppercase;
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  transition: var(--transition);
}

.btn-artisan:hover {
  background: var(--lux-gold);
  color: var(--lux-white);
}

/* ─── Footer ─── */
.lux-footer {
  padding: 6rem 2rem;
  background: var(--lux-black);
  border-top: 1px solid var(--lux-border);
  text-align: center;
}

.lux-footer-logo {
  height: 60px;
  margin-bottom: 2rem;
  opacity: 0.5;
}

.lux-footer-copy {
  font-size: 0.75rem;
  color: var(--lux-gray);
  letter-spacing: 0.05em;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* ─── Education Section (Accordion) ─── */
.lux-education-section {
  padding: 4rem 2rem;
  max-width: 800px;
  margin: 0 auto;
}

.lux-education-title {
  text-align: center;
  font-family: var(--font-serif);
  font-size: 2rem;
  margin-bottom: 2rem;
  color: var(--lux-gold-light);
}

.lux-accordion {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.lux-accordion-item {
  border: 1px solid var(--lux-border);
  border-radius: 4px;
  overflow: hidden;
  background: rgba(255,255,255,0.02);
}

.lux-accordion-header {
  padding: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  background: rgba(0,0,0,0.5);
  transition: var(--transition);
}

.lux-accordion-header:hover {
  background: rgba(212, 175, 55, 0.1);
}

.lux-accordion-title {
  font-family: var(--font-serif);
  font-size: 1.2rem;
}

.lux-accordion-icon {
  color: var(--lux-gold);
  font-size: 1.5rem;
  transition: transform 0.3s ease;
}

.lux-accordion-item.active .lux-accordion-icon {
  transform: rotate(45deg);
}

.lux-accordion-content {
  padding: 0 1.5rem;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.5s ease, padding 0.5s ease;
  color: var(--lux-gray);
  line-height: 1.8;
}

.lux-accordion-item.active .lux-accordion-content {
  padding: 1.5rem;
  max-height: 500px;
}

/* ─── Visual Guide Section ─── */
.lux-guide-section {
  padding: 4rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

@media (max-width: 900px) {
  .lux-guide-section {
    grid-template-columns: 1fr;
  }
}

.lux-guide-image-wrapper {
  position: relative;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}

.lux-guide-model {
  width: 100%;
  display: block;
}

.lux-guide-svg-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.lux-guide-path {
  fill: none;
  stroke: var(--lux-gold);
  stroke-width: 3;
  stroke-linecap: round;
  filter: drop-shadow(0 2px 4px rgba(0,0,0,0.5));
  transition: d 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.lux-guide-info {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.lux-guide-options {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.btn-length {
  background: transparent;
  border: 1px solid var(--lux-border);
  color: var(--lux-white);
  padding: 0.8rem 1.5rem;
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font-sans);
  border-radius: 4px;
}

.btn-length:hover, .btn-length.active {
  background: var(--lux-gold);
  color: var(--lux-black);
  border-color: var(--lux-gold);
}

.lux-guide-recommendation {
  background: rgba(255,255,255,0.03);
  padding: 2rem;
  border-left: 3px solid var(--lux-gold);
  border-radius: 0 4px 4px 0;
}

.lux-guide-recommendation h4 {
  color: var(--lux-gold-light);
  margin-bottom: 0.5rem;
  font-family: var(--font-serif);
}

.lux-guide-recommendation p {
  color: var(--lux-gray);
  line-height: 1.6;
}

/* ─── Calculator Section ─── */
.lux-calc-section {
  padding: 4rem 2rem;
  max-width: 600px;
  margin: 0 auto;
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--lux-border);
  border-radius: 8px;
  margin-bottom: 4rem;
}

.lux-calc-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-top: 2rem;
}

.lux-calc-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.lux-calc-group label {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--lux-gold-dim);
}

.lux-calc-input, .lux-calc-select {
  background: rgba(0,0,0,0.5);
  border: 1px solid var(--lux-border);
  color: var(--lux-white);
  padding: 1rem;
  font-family: var(--font-sans);
  font-size: 1rem;
  border-radius: 4px;
}

.lux-calc-select:focus, .lux-calc-input:focus {
  outline: none;
  border-color: var(--lux-gold);
}

.lux-calc-select option {
  background: var(--lux-black-soft);
  color: var(--lux-white);
}

.lux-calc-result {
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(255,255,255,0.05);
  text-align: center;
}

.lux-calc-result-label {
  font-size: 0.8rem;
  color: var(--lux-gray);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  margin-bottom: 0.5rem;
}

.lux-calc-result-value {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  color: var(--lux-gold-light);
}

/* ─── WhatsApp Contact Section ─── */
.lux-contact-wrapper {
  position: relative;
  padding: 8rem 2rem;
  background: linear-gradient(135deg, #0a0a0a 0%, #111 50%, #0a0a0a 100%);
  overflow: hidden;
  text-align: center;
}

.lux-contact-wrapper::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(212, 175, 55, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.lux-contact-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-top: 1px solid var(--lux-border);
  border-bottom: 1px solid var(--lux-border);
  pointer-events: none;
}

.lux-contact-content {
  position: relative;
  z-index: 1;
  max-width: 600px;
  margin: 0 auto;
}

.lux-contact-title {
  font-family: var(--font-serif);
  font-size: 2.8rem;
  margin-bottom: 1.5rem;
  background: linear-gradient(to right, var(--lux-gold-light), #fff, var(--lux-gold-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.lux-contact-subtitle {
  font-size: 1.05rem;
  color: var(--lux-gray);
  line-height: 1.8;
  margin-bottom: 2.5rem;
}

.lux-btn-whatsapp {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1.1rem 2.8rem;
  background: #25D366;
  color: var(--lux-white);
  text-decoration: none;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  border: none;
  border-radius: 2px;
  transition: var(--transition);
  box-shadow: 0 4px 20px rgba(37, 211, 102, 0.3);
}

.lux-btn-whatsapp:hover {
  background: #1ebe5d;
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(37, 211, 102, 0.4);
}

.lux-btn-whatsapp svg {
  flex-shrink: 0;
}