/* ========================================
   CUELONG Global Website - Main Stylesheet
   ======================================== */

/* -------------------- CSS Variables -------------------- */
:root {
  /* Colors */
  --color-primary: #2C3E50;
  --color-secondary: #E74C3C;
  --color-accent: #3498DB;
  --color-bg-white: #FFFFFF;
  --color-bg-light: #F8F9FA;
  --color-text-dark: #333333;
  --color-text-muted: #666666;
  --color-text-light: #999999;
  --color-border: #E0E0E0;

  /* Typography */
  --font-primary: 'Inter', 'Noto Sans KR', sans-serif;
  --font-heading: 'Poppins', 'Noto Sans KR', sans-serif;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-xxl: 4rem;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 20px;

  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;

  /* Container */
  --container-max: 1200px;
  --container-padding: 1rem;
}

/* -------------------- CSS Reset -------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-primary);
  color: var(--color-text-dark);
  background-color: var(--color-bg-white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* -------------------- Language Toggle -------------------- */
html[lang="en"] [data-lang="ko"]:not(.lang-btn) { display: none; }
html[lang="ko"] [data-lang="en"]:not(.lang-btn) { display: none; }

/* -------------------- Typography -------------------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-primary);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.1rem; }
h6 { font-size: 1rem; }

p {
  margin-bottom: var(--spacing-sm);
}

.text-center { text-align: center; }
.text-muted { color: var(--color-text-muted); }

/* -------------------- Layout -------------------- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.section {
  padding: var(--spacing-xxl) 0;
}

.section-title {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.section-title h2 {
  margin-bottom: var(--spacing-xs);
}

.section-title p {
  color: var(--color-text-muted);
  font-size: 1.1rem;
}

/* -------------------- Grid System -------------------- */
.grid {
  display: grid;
  gap: var(--spacing-lg);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* -------------------- Header -------------------- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: var(--color-bg-white);
  box-shadow: var(--shadow-sm);
  z-index: 1000;
  padding: var(--spacing-sm) 0;
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.logo img {
  height: 40px;
  width: auto;
}

.logo-text {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
}

/* Navigation */
.nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.nav-list {
  display: flex;
  gap: var(--spacing-md);
}

.nav-link {
  font-weight: 500;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-secondary);
  background: rgba(231, 76, 60, 0.1);
}

/* Language Toggle */
.lang-toggle {
  display: flex;
  gap: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.lang-btn {
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: 0.875rem;
  font-weight: 600;
  background: var(--color-bg-white);
  transition: all var(--transition-fast);
}

.lang-btn:hover {
  background: var(--color-bg-light);
}

.lang-btn.active {
  background: var(--color-primary);
  color: var(--color-bg-white);
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--spacing-xs);
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-primary);
  transition: all var(--transition-fast);
}

/* -------------------- Hero Section -------------------- */
.hero {
  position: relative;
  min-height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-primary) 0%, #1a252f 100%);
  color: var(--color-bg-white);
  text-align: center;
  padding-top: 80px;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('../image/imgi_12_main_visual01.jpg') center/cover no-repeat;
  opacity: 0.3;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
  padding: var(--spacing-xl);
}

.hero h1 {
  color: var(--color-bg-white);
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
}

.hero p {
  font-size: 1.25rem;
  opacity: 0.9;
  margin-bottom: var(--spacing-lg);
}

/* -------------------- Buttons -------------------- */
.btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-lg);
  font-weight: 600;
  text-align: center;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  cursor: pointer;
}

.btn-primary {
  background: var(--color-secondary);
  color: var(--color-bg-white);
}

.btn-primary:hover {
  background: #c0392b;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  border: 2px solid var(--color-bg-white);
  color: var(--color-bg-white);
  background: transparent;
}

.btn-outline:hover {
  background: var(--color-bg-white);
  color: var(--color-primary);
}

.btn-accent {
  background: var(--color-accent);
  color: var(--color-bg-white);
}

.btn-accent:hover {
  background: #2980b9;
  transform: translateY(-2px);
}

/* -------------------- Cards -------------------- */
.card {
  background: var(--color-bg-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  transition: all var(--transition-normal);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.card-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.card-body {
  padding: var(--spacing-md);
}

.card-title {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-xs);
}

.card-text {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

/* Product Card */
.product-card {
  text-align: center;
}

.product-card .card-img {
  height: 250px;
  padding: var(--spacing-md);
  object-fit: contain;
  background: var(--color-bg-light);
}

.product-category {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--spacing-xs);
}

/* Feature Card */
.feature-card {
  text-align: center;
  padding: var(--spacing-xl);
}

.feature-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--spacing-md);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-light);
  border-radius: 50%;
  font-size: 1.5rem;
}

/* -------------------- Features Section -------------------- */
.features {
  background: var(--color-bg-light);
}

.feature-item {
  text-align: center;
  padding: var(--spacing-lg);
}

.feature-item h3 {
  margin-bottom: var(--spacing-sm);
}

/* -------------------- Products Preview -------------------- */
.products-preview {
  background: var(--color-bg-white);
}

/* -------------------- YouTube Section -------------------- */
.youtube-section {
  background: var(--color-primary);
  color: var(--color-bg-white);
}

.youtube-section .section-title h2 {
  color: var(--color-bg-white);
}

.youtube-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-lg);
}

.video-wrapper {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.video-wrapper iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
}

/* -------------------- CTA Section -------------------- */
.cta-section {
  background: linear-gradient(135deg, var(--color-secondary) 0%, #c0392b 100%);
  color: var(--color-bg-white);
  text-align: center;
}

.cta-section h2 {
  color: var(--color-bg-white);
  margin-bottom: var(--spacing-md);
}

.cta-section p {
  font-size: 1.1rem;
  margin-bottom: var(--spacing-lg);
  opacity: 0.9;
}

/* -------------------- Footer -------------------- */
.footer {
  background: var(--color-primary);
  color: var(--color-bg-white);
  padding: var(--spacing-xxl) 0 var(--spacing-lg);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.footer-logo {
  margin-bottom: var(--spacing-md);
}

.footer-logo img {
  height: 40px;
  filter: brightness(0) invert(1);
}

.footer-desc {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.95rem;
}

.footer-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--color-bg-white);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.footer-links a {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.9rem;
  transition: color var(--transition-fast);
}

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

.footer-contact p {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.9rem;
  margin-bottom: var(--spacing-xs);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--spacing-lg);
  text-align: center;
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.85rem;
}

/* -------------------- Page Header (Sub Pages) -------------------- */
.page-header {
  background: linear-gradient(135deg, var(--color-primary) 0%, #1a252f 100%);
  color: var(--color-bg-white);
  padding: 140px 0 60px;
  text-align: center;
}

.page-header h1 {
  color: var(--color-bg-white);
  margin-bottom: var(--spacing-xs);
}

.page-header p {
  opacity: 0.8;
}

/* Breadcrumb */
.breadcrumb {
  display: flex;
  justify-content: center;
  gap: var(--spacing-xs);
  margin-top: var(--spacing-md);
  font-size: 0.9rem;
}

.breadcrumb a {
  opacity: 0.7;
}

.breadcrumb a:hover {
  opacity: 1;
}

.breadcrumb span {
  opacity: 0.5;
}

/* -------------------- About Page -------------------- */
.about-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
  align-items: center;
}

.about-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.ceo-section {
  background: var(--color-bg-light);
}

.ceo-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.ceo-message {
  font-size: 1.1rem;
  line-height: 1.8;
  font-style: italic;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-md);
}

.ceo-name {
  font-weight: 600;
  color: var(--color-primary);
}

/* Certifications */
.cert-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
}

.cert-item {
  text-align: center;
  padding: var(--spacing-md);
  background: var(--color-bg-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.cert-item img {
  max-height: 200px;
  margin: 0 auto var(--spacing-sm);
  object-fit: contain;
}

/* -------------------- Products Page -------------------- */
.product-category-section {
  padding: var(--spacing-xl) 0;
  border-bottom: 1px solid var(--color-border);
}

.product-category-section:last-child {
  border-bottom: none;
}

.product-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
  align-items: center;
}

.product-detail.reverse {
  direction: rtl;
}

.product-detail.reverse > * {
  direction: ltr;
}

.product-images {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-md);
}

.product-images img {
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-normal);
}

.product-images img:hover {
  transform: scale(1.05);
}

.product-info h3 {
  margin-bottom: var(--spacing-sm);
  color: var(--color-primary);
}

.product-info p {
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-md);
}

.product-features {
  margin-top: var(--spacing-md);
}

.product-features li {
  padding: var(--spacing-xs) 0;
  padding-left: var(--spacing-md);
  position: relative;
  color: var(--color-text-muted);
}

.product-features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: 600;
}

/* -------------------- Technology Page -------------------- */
.tech-intro {
  text-align: center;
  max-width: 800px;
  margin: 0 auto var(--spacing-xl);
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-xl);
}

.tech-item {
  background: var(--color-bg-white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-md);
}

.tech-item img {
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-md);
}

.process-section {
  background: var(--color-bg-light);
}

.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-md);
}

.process-step {
  text-align: center;
  padding: var(--spacing-md);
  background: var(--color-bg-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.process-step img {
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-sm);
}

.process-number {
  display: inline-block;
  width: 32px;
  height: 32px;
  line-height: 32px;
  background: var(--color-secondary);
  color: var(--color-bg-white);
  border-radius: 50%;
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
}

/* -------------------- Media Page -------------------- */
.media-intro {
  text-align: center;
  max-width: 600px;
  margin: 0 auto var(--spacing-xl);
}

.channel-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  background: #FF0000;
  color: var(--color-bg-white);
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-md);
  font-weight: 600;
  margin-top: var(--spacing-md);
  transition: all var(--transition-fast);
}

.channel-link:hover {
  background: #cc0000;
  transform: translateY(-2px);
}

/* -------------------- Contact Page -------------------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
}

.contact-info {
  background: var(--color-bg-light);
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
}

.contact-item {
  margin-bottom: var(--spacing-lg);
}

.contact-item:last-child {
  margin-bottom: 0;
}

.contact-item h4 {
  color: var(--color-primary);
  margin-bottom: var(--spacing-xs);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.contact-item p,
.contact-item a {
  color: var(--color-text-dark);
  font-size: 1.1rem;
}

.contact-item a:hover {
  color: var(--color-secondary);
}

.contact-form {
  padding: var(--spacing-xl);
  background: var(--color-bg-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.contact-form p {
  margin-bottom: var(--spacing-lg);
  color: var(--color-text-muted);
}

.map-container {
  margin-top: var(--spacing-xl);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.map-container iframe {
  width: 100%;
  height: 400px;
  border: none;
}

/* -------------------- Responsive Design -------------------- */

/* Tablet */
@media (max-width: 1024px) {
  :root {
    --container-padding: 1.5rem;
  }

  h1 { font-size: 2rem; }
  h2 { font-size: 1.75rem; }

  .hero h1 { font-size: 2.5rem; }

  .grid-4 { grid-template-columns: repeat(2, 1fr); }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .about-intro,
  .product-detail,
  .contact-grid,
  .tech-grid {
    grid-template-columns: 1fr;
  }

  .product-detail.reverse {
    direction: ltr;
  }

  .cert-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .process-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Mobile */
@media (max-width: 768px) {
  :root {
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;
  }

  h1 { font-size: 1.75rem; }
  h2 { font-size: 1.5rem; }
  h3 { font-size: 1.25rem; }

  .hero {
    min-height: 70vh;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero p {
    font-size: 1rem;
  }

  /* Mobile Navigation */
  .nav-list {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--color-bg-white);
    flex-direction: column;
    padding: var(--spacing-md);
    box-shadow: var(--shadow-md);
    display: none;
  }

  .nav-list.active {
    display: flex;
  }

  .menu-toggle {
    display: flex;
  }

  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }

  .youtube-grid {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .cert-grid {
    grid-template-columns: 1fr;
  }

  .product-images {
    grid-template-columns: 1fr;
  }

  .process-grid {
    grid-template-columns: 1fr;
  }

  .page-header {
    padding: 120px 0 40px;
  }

  .btn {
    width: 100%;
    text-align: center;
  }
}

/* Small Mobile */
@media (max-width: 480px) {
  :root {
    --container-padding: 1rem;
  }

  .hero h1 {
    font-size: 1.75rem;
  }

  .lang-toggle {
    font-size: 0.75rem;
  }

  .card-body {
    padding: var(--spacing-sm);
  }
}

/* -------------------- Before/After Comparison -------------------- */
.comparison-section {
  background: var(--color-bg-light);
}

.comparison-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-xl);
}

.comparison-item {
  background: var(--color-bg-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.comparison-images {
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.comparison-img {
  position: relative;
}

.comparison-img img {
  width: 100%;
  height: 250px;
  object-fit: cover;
}

.comparison-label {
  position: absolute;
  bottom: 10px;
  left: 10px;
  background: rgba(0, 0, 0, 0.7);
  color: var(--color-bg-white);
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
}

.comparison-label.after {
  background: var(--color-secondary);
}

.comparison-content {
  padding: var(--spacing-lg);
}

.comparison-content h4 {
  margin-bottom: var(--spacing-sm);
  color: var(--color-primary);
}

.comparison-content p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

/* Technology Detail Section */
.tech-detail-section {
  padding: var(--spacing-xl) 0;
  border-bottom: 1px solid var(--color-border);
}

.tech-detail-section:last-child {
  border-bottom: none;
}

.tech-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
  align-items: center;
}

.tech-detail.reverse {
  direction: rtl;
}

.tech-detail.reverse > * {
  direction: ltr;
}

.tech-detail-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.tech-detail-image img {
  width: 100%;
  height: auto;
}

.tech-detail-content h3 {
  color: var(--color-primary);
  margin-bottom: var(--spacing-md);
}

.tech-detail-content p {
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-md);
  line-height: 1.8;
}

.tech-features {
  margin-top: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--color-bg-light);
  border-radius: var(--radius-md);
}

.tech-features h5 {
  margin-bottom: var(--spacing-sm);
  color: var(--color-primary);
}

.tech-features ul {
  display: grid;
  gap: var(--spacing-xs);
}

.tech-features li {
  padding-left: var(--spacing-md);
  position: relative;
  color: var(--color-text-muted);
}

.tech-features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: 600;
}

/* Technology Stats */
.tech-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-md);
  margin-top: var(--spacing-xl);
}

.stat-item {
  text-align: center;
  padding: var(--spacing-lg);
  background: var(--color-bg-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-secondary);
  line-height: 1;
  margin-bottom: var(--spacing-xs);
}

.stat-label {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

@media (max-width: 1024px) {
  .comparison-grid {
    grid-template-columns: 1fr;
  }

  .tech-detail {
    grid-template-columns: 1fr;
  }

  .tech-detail.reverse {
    direction: ltr;
  }

  .tech-stats {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .comparison-images {
    grid-template-columns: 1fr;
  }

  .comparison-img img {
    height: 200px;
  }

  .tech-stats {
    grid-template-columns: 1fr;
  }

  .stat-number {
    font-size: 2rem;
  }
}

/* -------------------- Utility Classes -------------------- */
.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }

.py-1 { padding-top: var(--spacing-sm); padding-bottom: var(--spacing-sm); }
.py-2 { padding-top: var(--spacing-md); padding-bottom: var(--spacing-md); }
.py-3 { padding-top: var(--spacing-lg); padding-bottom: var(--spacing-lg); }
.py-4 { padding-top: var(--spacing-xl); padding-bottom: var(--spacing-xl); }

.bg-light { background: var(--color-bg-light); }
.bg-primary { background: var(--color-primary); color: var(--color-bg-white); }

.hidden { display: none; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}