/* LUMEN OPTIC | Premium Eyewear Brand Styles */
:root {
  --primary-color: #0f172a; /* Slate 900 */
  --accent-color: #475569; /* Slate 600 */
  --bg-light: #f8fafc; /* Slate 50 */
  --text-dark: #0f172a;
  --text-muted: #64748b;
  --white: #ffffff;
  --border-color: #e2e8f0;
  
  --font-sans: 'Plus Jakarta Sans', 'Noto Sans KR', sans-serif;
  --font-serif: 'Playfair Display', Georgia, serif;
}

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

body {
  background-color: var(--bg-light);
  color: var(--text-dark);
  font-family: var(--font-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  word-break: keep-all;
  overflow-wrap: break-word;
}

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

img {
  width: 100%;
  display: block;
  object-fit: cover;
}

/* Top Bar */
.top-bar {
  background-color: var(--primary-color);
  color: var(--white);
  text-align: center;
  padding: 10px 20px;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  font-weight: 500;
}

/* Header & Navigation */
.header {
  background-color: rgba(255, 255, 255, 0.95);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
}

.header-container {
  max-width: 1440px;
  margin: 0 auto;
  padding: 20px 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand-logo {
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: 1.5rem;
  letter-spacing: 0.3em;
  color: var(--primary-color);
}

.nav-menu {
  display: flex;
  gap: 40px;
}

.nav-item {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent-color);
  letter-spacing: 0.05em;
  position: relative;
  padding: 6px 0;
}

.nav-item::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--primary-color);
  transition: width 0.3s ease;
}

.nav-item:hover::after {
  width: 100%;
}

.nav-item:hover {
  color: var(--primary-color);
}

.header-utility {
  display: flex;
  align-items: center;
  gap: 24px;
}

.utility-link {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--accent-color);
}

.utility-link:hover {
  color: var(--primary-color);
}

.icon-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--accent-color);
  display: flex;
  align-items: center;
  transition: color 0.3s ease;
}

.icon-btn:hover {
  color: var(--primary-color);
}

/* Mobile Toggle */
.mobile-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 24px;
  height: 18px;
  background: none;
  border: none;
  cursor: pointer;
  z-index: 110;
}

.mobile-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--primary-color);
  transition: all 0.3s ease;
}

/* Hero Section */
.hero {
  position: relative;
  height: 620px;
  overflow: hidden;
  background-color: #eaeef1;
}

.hero-image-wrap {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero-image-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: right center;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.95) 0%, rgba(255, 255, 255, 0.8) 35%, transparent 70%);
}

.hero-content-overlay {
  max-width: 1440px;
  margin: 0 auto;
  height: 100%;
  position: relative;
  z-index: 10;
  display: flex;
  align-items: center;
  padding: 0 80px;
}

.hero-content-box {
  max-width: 580px;
}

.hero-subtitle {
  font-size: 0.8rem;
  letter-spacing: 0.25em;
  font-weight: 700;
  color: var(--accent-color);
  display: block;
  margin-bottom: 16px;
}

.hero h1 {
  font-family: var(--font-serif);
  font-size: 3.25rem;
  line-height: 1.15;
  font-weight: 500;
  margin-bottom: 20px;
  color: var(--primary-color);
  letter-spacing: -0.02em;
}

.hero p {
  font-size: 1.05rem;
  color: var(--text-muted);
  margin-bottom: 36px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 16px;
}

.btn {
  display: inline-block;
  padding: 16px 36px;
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  border-radius: 4px;
  transition: all 0.3s ease;
  cursor: pointer;
}

.btn-primary {
  background-color: var(--primary-color);
  color: var(--white);
  border: 1px solid var(--primary-color);
}

.btn-primary:hover {
  background-color: #1e293b;
  border-color: #1e293b;
  transform: translateY(-2px);
}

.btn-secondary {
  background-color: transparent;
  color: var(--primary-color);
  border: 1px solid var(--primary-color);
}

.btn-secondary:hover {
  background-color: rgba(15, 23, 42, 0.05);
  transform: translateY(-2px);
}

/* Split Section */
.split-section {
  padding: 80px 40px;
  background-color: var(--white);
}

.split-container {
  max-width: 1440px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.split-card {
  background-color: var(--bg-light);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.split-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.05);
}

.card-info {
  padding: 50px 50px 30px;
}

.card-tag {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--text-muted);
  display: block;
  margin-bottom: 12px;
}

.split-card h2 {
  font-family: var(--font-serif);
  font-size: 1.85rem;
  font-weight: 500;
  margin-bottom: 14px;
}

.split-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 24px;
  line-height: 1.6;
}

.card-link {
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  color: var(--primary-color);
}

.card-image {
  height: 340px;
  overflow: hidden;
}

.card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.split-card:hover .card-image img {
  transform: scale(1.05);
}

/* Products Section */
.products-section {
  padding: 100px 40px;
}

.section-title {
  max-width: 1440px;
  margin: 0 auto 50px;
  text-align: center;
}

.section-title .subtitle {
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.2em;
  color: var(--text-muted);
  display: block;
  margin-bottom: 12px;
}

.section-title h2 {
  font-family: var(--font-serif);
  font-size: 2.2rem;
  font-weight: 500;
  color: var(--primary-color);
}

.products-grid {
  max-width: 1440px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.product-card {
  background-color: var(--white);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  overflow: hidden;
  transition: all 0.3s ease;
}

.product-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.06);
}

.product-image-box {
  background-color: #f1f5f9;
  height: 320px;
  overflow: hidden;
  position: relative;
}

.product-image-box img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

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

.product-badge {
  position: absolute;
  top: 15px;
  left: 15px;
  background-color: var(--primary-color);
  color: var(--white);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  padding: 4px 8px;
  border-radius: 2px;
}

.product-meta {
  padding: 24px;
  border-top: 1px solid var(--border-color);
}

.product-meta h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.product-meta .price {
  font-weight: 700;
  color: var(--accent-color);
  font-size: 1.05rem;
  display: block;
  margin-bottom: 12px;
}

.product-meta .desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* Benefits Section */
.benefits-section {
  background-color: var(--white);
  padding: 80px 40px;
  border-top: 1px solid var(--border-color);
}

.benefits-container {
  max-width: 1440px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
}

.benefit-item {
  text-align: center;
  padding: 20px;
}

.benefit-icon {
  width: 54px;
  height: 54px;
  background-color: #f1f5f9;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  color: var(--primary-color);
}

.benefit-item h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.benefit-item p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Footer */
.footer {
  background-color: var(--primary-color);
  color: var(--white);
  padding: 80px 40px 40px;
}

.footer-container {
  max-width: 1440px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 80px;
  margin-bottom: 60px;
}

.footer-brand h3 {
  font-size: 1.5rem;
  letter-spacing: 0.25em;
  margin-bottom: 16px;
}

.footer-brand p {
  color: #94a3b8;
  font-size: 0.9rem;
  max-width: 320px;
}

.footer-links {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.footer-links h4 {
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  color: #94a3b8;
  margin-bottom: 20px;
}

.footer-links a {
  display: block;
  font-size: 0.85rem;
  color: #cbd5e1;
  margin-bottom: 12px;
}

.footer-links a:hover {
  color: var(--white);
}

.footer-bottom {
  max-width: 1440px;
  margin: 0 auto;
  border-top: 1px solid #1e293b;
  padding-top: 30px;
  text-align: center;
  font-size: 0.8rem;
  color: #64748b;
}

/* Responsive Design */
@media (max-width: 1024px) {
  .header-container {
    padding: 20px;
  }
  
  .hero {
    height: 520px;
  }
  
  .hero-content-overlay {
    padding: 0 40px;
  }
  
  .hero h1 {
    font-size: 2.5rem;
  }
  
  .split-container {
    grid-template-columns: 1fr;
  }
  
  .products-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .benefits-container {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  /* Header Menu Mobile Stack */
  .mobile-toggle {
    display: flex;
  }
  
  .nav-menu {
    position: fixed;
    top: 74px;
    left: 0;
    width: 100%;
    height: calc(100vh - 74px);
    background-color: var(--white);
    flex-direction: column;
    padding: 40px;
    gap: 30px;
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  }
  
  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  
  /* Animate Toggle Button */
  .mobile-toggle.active span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }
  
  .mobile-toggle.active span:nth-child(2) {
    opacity: 0;
  }
  
  .mobile-toggle.active span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }
  
  .utility-link {
    display: none;
  }
  
  .hero {
    height: 580px;
  }
  
  .hero::after {
    background: linear-gradient(0deg, rgba(255, 255, 255, 0.95) 15%, rgba(255, 255, 255, 0.7) 50%, transparent 100%);
  }
  
  .hero-content-overlay {
    padding: 20px;
    align-items: flex-end;
  }
  
  .hero-content-box {
    margin-bottom: 20px;
  }
  
  .hero h1 {
    font-size: 2.2rem;
  }
  
  .hero p {
    margin-bottom: 24px;
  }
  
  .split-section, .products-section, .benefits-section {
    padding: 60px 20px;
  }
  
  .products-grid {
    grid-template-columns: 1fr;
  }
  
  .benefits-container {
    grid-template-columns: 1fr;
  }
  
  .footer-container {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .footer-links {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   MOCKUP DESIGN SYSTEM RE-ALIGNMENT
   ========================================================================== */
/* Split Hero Section */
.hero-split {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  min-height: 600px;
  background-color: #f1f5f9;
}

.hero-text-side {
  display: flex;
  align-items: center;
  padding: 80px 10%;
  background-color: #ffffff;
}

.hero-text-content {
  max-width: 540px;
}

.hero-text-content h1 {
  font-family: var(--font-serif);
  font-size: 3.8rem;
  line-height: 1.1;
  font-weight: 500;
  color: var(--primary-color);
  margin-bottom: 20px;
  letter-spacing: -0.01em;
}

.hero-text-content p {
  font-size: 0.98rem;
  line-height: 1.7;
  color: var(--text-muted);
  margin-bottom: 36px;
}

.hero-image-side {
  position: relative;
  overflow: hidden;
}

.hero-image-side img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Mid Row Grid (Signature Frames & Lens Tech) */
.mid-row-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 20px;
  padding: 20px 40px;
  background-color: var(--bg-light);
}

/* Signature Frames Block */
.sig-frames-block {
  background-color: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 40px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.sig-title-area {
  margin-bottom: 30px;
}

.block-tag {
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.15em;
  color: var(--text-muted);
  display: block;
  margin-bottom: 10px;
  text-transform: uppercase;
}

.sig-title-area h2 {
  font-family: var(--font-serif);
  font-size: 1.85rem;
  font-weight: 500;
  line-height: 1.3;
  margin-bottom: 12px;
}

.block-link {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--primary-color);
  border-bottom: 1.5px solid var(--primary-color);
  padding-bottom: 2px;
  display: inline-block;
}

.sig-cards-area {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.product-item-card {
  background-color: var(--bg-light);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.3s ease;
}

.product-item-card:hover {
  transform: translateY(-4px);
}

.card-img-holder {
  height: 220px;
  background-color: #eaeaea;
  position: relative;
  overflow: hidden;
}

.card-img-holder img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.badge-best {
  position: absolute;
  top: 10px;
  left: 10px;
  background-color: var(--primary-color);
  color: var(--white);
  font-size: 0.65rem;
  font-weight: 800;
  padding: 2px 6px;
  border-radius: 2px;
  letter-spacing: 0.05em;
}

.card-meta-holder {
  padding: 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: #ffffff;
  border-top: 1px solid var(--border-color);
}

.card-meta-holder h4 {
  font-size: 0.88rem;
  font-weight: 700;
}

.card-meta-holder .price {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-color);
}

/* Lens Tech Block */
.lens-tech-block {
  background-color: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 40px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.lens-text-area h2 {
  font-family: var(--font-serif);
  font-size: 1.85rem;
  font-weight: 500;
  line-height: 1.3;
  margin-bottom: 12px;
}

.lens-text-area p {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 24px;
}

.lens-image-area {
  height: 180px;
  overflow: hidden;
  margin-top: 20px;
  border-radius: 6px;
  border: 1px solid var(--border-color);
}

.lens-image-area img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Responsive adjustments for new grid system */
@media (max-width: 1024px) {
  .hero-split {
    grid-template-columns: 1fr;
    min-height: auto;
  }
  .hero-text-side {
    padding: 60px 40px;
  }
  .hero-image-side {
    height: 400px;
  }
  .mid-row-grid {
    grid-template-columns: 1fr;
    padding: 20px;
  }
}

@media (max-width: 768px) {
  .hero-text-content h1 {
    font-size: 2.4rem;
  }
  .sig-cards-area {
    grid-template-columns: 1fr;
    gap: 20px;
  }
}