:root {
  --atc-primary: #1a1a1a;
  --atc-primary-light: #333333;
  --atc-secondary: #666666;
  --atc-accent: #cc0000;
  --atc-light-gray: #f8f8f8;
  --atc-border: #e0e0e0;
  --atc-text: #333333;
  --atc-white: #ffffff;
  --atc-hero-dark: #2c2c2c;
  --atc-hero-mid: #4a4a4a;
  --atc-hero-light: #5a5a5a;
  --font-primary: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans JP", sans-serif;
}

.atc-main * {
  font-family: var(--font-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.atc-main {
  min-height: 100vh;
  padding-top: 0;
}

.atc-main .container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.atc-main p,
.atc-main li,
.atc-main td,
.atc-main span {
  font-family: var(--font-primary);
  font-size: 1rem;
  line-height: 1.75;
  color: #4a4a4a;
  font-weight: 400;
  letter-spacing: 0.02em;
}

.atc-main p {
  margin-bottom: 1.5rem;
}

.atc-main .section-title {
  font-size: 2.5em;
  text-align: center;
  color: var(--atc-primary);
  margin-bottom: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 3px;
  font-family: var(--font-primary);
}

.atc-main .section-subtitle {
  text-align: center;
  color: #7a7a7a;
  margin-bottom: 40px;
  font-size: 1.1em;
  font-weight: 400;
  letter-spacing: 0.05em;
  font-family: var(--font-primary);
}

.atc-main h1,
.atc-main h2,
.atc-main h3,
.atc-main h4,
.atc-main h5,
.atc-main h6 {
  font-family: var(--font-primary);
  font-weight: 500;
  letter-spacing: 0.02em;
  line-height: 1.4;
}

.atc-main a {
  font-family: var(--font-primary);
  transition: all 0.3s ease;
}

.hero-section,
.product-hero {
  background: linear-gradient(135deg, var(--atc-hero-dark) 0%, var(--atc-hero-mid) 50%, var(--atc-hero-light) 100%);
  color: white;
  text-align: center;
}

.hero-section {
  padding: 120px 0;
  position: relative;
}

.product-hero {
  padding: 80px 0 60px;
  position: relative;
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero-title {
  font-size: 2.5em;
  margin-bottom: 20px;
  letter-spacing: 2px;
  font-weight: 300;
}

.hero-subtitle {
  font-size: 1.2em;
  color: #e0e0e0;
  margin-bottom: 40px;
  font-weight: 300;
  letter-spacing: 0.05em;
}

.product-hero-header {
  text-align: center;
  margin-bottom: 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.product-hero h1 {
  font-size: 3em;
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: 3px;
  font-weight: 300;
}

.product-tagline {
  text-align: center;
  font-size: 1.2em;
  color: #e0e0e0;
  font-weight: 300;
  letter-spacing: 0.05em;
}

.breadcrumb {
  display: none;
}

.brand-logo-hero-wrapper {
  display: inline-block;
  margin-bottom: 30px;
}

.brand-logo-hero {
  height: 80px;
  width: auto;
}

.brand-logo-product {
  height: 50px;
  width: auto;
  margin-bottom: 20px;
}

.cta-buttons {
  display: flex;
  gap: 20px;
  justify-content: center;
  align-items: center;
  margin-top: 30px;
}

.btn-atc {
  display: inline-block;
  padding: 12px 30px;
  text-decoration: none;
  border-radius: 3px;
  transition: all 0.3s;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 1px;
  border: 2px solid transparent;
  font-size: 0.95rem;
}

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

.btn-primary:hover {
  background-color: #990000;
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(204, 0, 0, 0.3);
}

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

.btn-outline:hover {
  background: white;
  color: var(--atc-hero-dark);
  transform: translateY(-2px);
}

.btn-large {
  padding: 15px 40px;
  font-size: 1rem;
}

.brand-nav {
  background-color: var(--atc-white);
  border-bottom: 1px solid var(--atc-border);
  position: sticky;
  top: 0;
  z-index: 100;
  transition: all 0.3s;
  margin-top: 0;
}

.brand-nav-wrapper {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0;
}

.brand-nav-menu {
  display: flex;
  list-style: none;
  padding: 0;
  margin: 0;
  justify-content: center;
  align-items: center;
}

.brand-nav-menu>li {
  position: relative;
}

.brand-nav-menu>li>a {
  display: block;
  padding: 20px 20px;
  color: #4a4a4a;
  text-decoration: none;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  transition: all 0.3s;
  white-space: nowrap;
  font-size: 0.9em;
  border-bottom: 3px solid transparent;
}

.brand-nav-menu>li>a:hover {
  color: var(--atc-accent);
  background-color: var(--atc-light-gray);
}

.brand-nav-menu>li>a.active {
  color: var(--atc-accent);
  border-bottom: 3px solid var(--atc-accent);
}

.nav-dropdown {
  position: relative;
}

.dropdown-toggle::after {
  content: '▼';
  font-size: 0.6em;
  margin-left: 5px;
  transition: transform 0.3s;
  display: inline-block;
}

.nav-dropdown:hover .dropdown-toggle::after {
  transform: rotate(180deg);
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  background: white;
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.15);
  border-radius: 0 0 5px 5px;
  min-width: 200px;
  display: none;
  z-index: 1000;
  border-top: 3px solid var(--atc-accent);
}

.nav-dropdown:hover .dropdown-menu {
  display: block;
}

.dropdown-menu a {
  display: block;
  padding: 12px 20px;
  color: #4a4a4a;
  text-decoration: none;
  transition: all 0.3s;
  font-size: 0.9em;
  white-space: nowrap;
  border-bottom: 1px solid var(--atc-border);
  font-weight: 400;
  letter-spacing: 0.02em;
}

.dropdown-menu a:last-child {
  border-bottom: none;
}

.dropdown-menu a:hover {
  background: var(--atc-light-gray);
  color: var(--atc-accent);
  padding-left: 25px;
}

.dropdown-menu a.active {
  color: var(--atc-accent);
  background: var(--atc-light-gray);
}

.nav-submenu-panel {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.9);
  z-index: 9999;
  overflow-y: auto;
}

.nav-submenu-panel.show {
  display: block;
}

.submenu-close {
  position: absolute;
  top: 20px;
  right: 20px;
  color: white;
  font-size: 40px;
  cursor: pointer;
  z-index: 10000;
  transition: color 0.3s;
}

.submenu-close:hover {
  color: var(--atc-accent);
}

.submenu-content {
  max-width: 1000px;
  margin: 80px auto;
  padding: 20px;
}

.submenu-title {
  color: white;
  font-size: 2em;
  text-align: center;
  margin-bottom: 40px;
  text-transform: uppercase;
  letter-spacing: 2px;
  font-weight: 300;
}

.submenu-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
}

.submenu-item {
  background: white;
  padding: 20px;
  border-radius: 5px;
  text-align: center;
  text-decoration: none;
  color: #4a4a4a;
  transition: all 0.3s;
}

.submenu-item:hover {
  background: var(--atc-accent);
  color: white;
  transform: scale(1.05);
}

.submenu-item h4 {
  font-size: 1.2em;
  margin: 0;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.store-link {
  background: var(--atc-accent);
  color: white !important;
  margin-left: 15px;
  border-radius: 3px;
  padding: 15px 25px !important;
}

.store-link:hover {
  background: #990000 !important;
  transform: scale(1.05);
}

.featured-section,
.features-section {
  padding: 80px 0;
  background: white;
}

.featured-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 40px;
  margin-top: 50px;
}

.featured-item {
  background: #f8f8f8;
  border-radius: 5px;
  overflow: hidden;
  transition: all 0.3s;
  text-decoration: none;
  display: block;
}

.featured-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.featured-item img {
  width: 100%;
  height: 250px;
  object-fit: contain;
  background: white;
  padding: 20px;
}

.featured-info {
  padding: 30px;
}

.featured-info h3 {
  color: var(--atc-primary);
  margin-bottom: 10px;
  font-weight: 500;
  font-size: 1.3rem;
  letter-spacing: 0.5px;
}

.featured-info p {
  color: #5a5a5a;
  font-size: 0.95rem;
  line-height: 1.7;
  font-weight: 400;
  letter-spacing: 0.02em;
}

.about-section {
  padding: 80px 0;
  background: var(--atc-light-gray);
}

.about-content {
  max-width: 900px;
  margin: 0 auto;
  text-align: left;
}

.about-text {
  font-size: 1.05rem;
  line-height: 1.85;
  color: #4a4a4a;
  margin-bottom: 2rem;
  font-weight: 400;
  letter-spacing: 0.03em;
}

.about-text.highlight {
  font-size: 1.3rem;
  font-weight: 500;
  text-align: center;
  margin-bottom: 3rem;
  color: var(--atc-primary);
  letter-spacing: 0.05em;
  line-height: 1.6;
}

.studio-images {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
  margin-top: 50px;
}

.studio-image {
  border-radius: 5px;
  overflow: hidden;
}

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

.product-detail {
  padding: 60px 0;
  background: white;
}

.product-showcase {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}

.product-gallery-wrapper {
  position: sticky;
  top: 100px;
}

.product-gallery {
  background: var(--atc-light-gray);
  border-radius: 10px;
  padding: 30px;
}

.main-image {
  position: relative;
  margin-bottom: 20px;
  cursor: pointer;
  background: white;
  border-radius: 5px;
  padding: 20px;
}

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

.zoom-hint {
  position: absolute;
  bottom: 10px;
  right: 10px;
  background: rgba(0, 0, 0, 0.7);
  color: white;
  padding: 5px 10px;
  border-radius: 3px;
  font-size: 0.8em;
  opacity: 0;
  transition: opacity 0.3s;
  letter-spacing: 0.02em;
}

.main-image:hover .zoom-hint {
  opacity: 1;
}

.thumbnail-images {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}

.thumbnail-images img {
  width: 100%;
  height: 80px;
  object-fit: contain;
  background: white;
  padding: 10px;
  border-radius: 3px;
  cursor: pointer;
  transition: all 0.3s;
  border: 2px solid transparent;
}

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

.thumbnail-images img.active {
  border-color: var(--atc-accent);
}

.product-info {
  padding: 20px 0;
}

.product-info-header {
  margin-bottom: 30px;
}

.product-info h2 {
  font-size: 2em;
  margin-bottom: 20px;
  color: var(--atc-primary);
  font-weight: 500;
  letter-spacing: 0.03em;
}

.product-info h3 {
  font-size: 1.3em;
  margin: 25px 0 15px;
  color: var(--atc-primary);
  font-weight: 500;
  letter-spacing: 0.03em;
}

.product-description {
  font-size: 1.05rem;
  line-height: 1.8;
  color: #4a4a4a;
  margin-bottom: 1.5rem;
  font-weight: 400;
  letter-spacing: 0.02em;
}

.product-description strong {
  font-weight: 600;
  color: var(--atc-primary);
}

.key-features {
  background: var(--atc-light-gray);
  padding: 25px;
  border-radius: 5px;
  margin: 30px 0;
}

.key-features h3 {
  margin-top: 0;
  font-weight: 500;
  color: var(--atc-primary);
  letter-spacing: 0.03em;
}

.key-features ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.key-features li {
  padding: 8px 0;
  padding-left: 25px;
  position: relative;
  font-size: 0.95rem;
  line-height: 1.7;
  color: #4a4a4a;
  letter-spacing: 0.02em;
}

.key-features li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--atc-accent);
  font-weight: bold;
}

.amplifier-info {
  margin: 30px 0;
}

.amplifier-info h4 {
  font-size: 1.1em;
  margin-bottom: 15px;
  color: var(--atc-primary);
  font-weight: 500;
  letter-spacing: 0.03em;
}

.amplifier-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 15px;
}

.amp-item {
  text-align: center;
  background: var(--atc-light-gray);
  padding: 15px;
  border-radius: 5px;
}

.amp-value {
  font-size: 1.8em;
  font-weight: 600;
  color: var(--atc-accent);
  letter-spacing: 0.02em;
}

.amp-label {
  font-size: 0.9em;
  color: #6a6a6a;
  margin-top: 5px;
  font-weight: 400;
  letter-spacing: 0.02em;
}

.product-dimensions {
  background: white;
  border: 1px solid var(--atc-border);
  padding: 25px;
  border-radius: 5px;
  margin: 30px 0;
}

.product-dimensions h4 {
  font-size: 1.1em;
  margin-bottom: 15px;
  color: var(--atc-primary);
  font-weight: 500;
  letter-spacing: 0.03em;
}

.dimensions-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 15px;
}

.dimension-item {
  text-align: center;
}

.dimension-value {
  font-size: 1.5em;
  font-weight: 600;
  color: var(--atc-primary);
  letter-spacing: 0.02em;
}

.dimension-label {
  font-size: 0.9em;
  color: #6a6a6a;
  margin-top: 5px;
  font-weight: 400;
  letter-spacing: 0.02em;
}

.product-cta {
  margin-top: 40px;
  display: flex;
  gap: 15px;
}

.technology-section {
  padding: 80px 0;
  background: var(--atc-light-gray);
}

.technology-content {
  max-width: 900px;
  margin: 0 auto;
}

.technology-content h3 {
  font-size: 1.5em;
  color: var(--atc-primary);
  margin: 30px 0 15px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--atc-accent);
  font-weight: 500;
  letter-spacing: 0.03em;
}

.technology-content p {
  font-size: 1rem;
  line-height: 1.85;
  color: #4a4a4a;
  margin-bottom: 1.5rem;
  text-align: left;
  font-weight: 400;
  letter-spacing: 0.03em;
}

.technology-content img {
  width: 100%;
  margin-top: 30px;
}

.specs-section {
  padding: 80px 0;
  background: white;
}

.specs-container {
  max-width: 1000px;
  margin: 0 auto;
}

.specs-table {
  background: white;
  border-radius: 5px;
  overflow: hidden;
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
  margin-bottom: 40px;
}

.specs-table table {
  width: 100%;
  border-collapse: collapse;
}

.specs-table th {
  background: var(--atc-primary);
  color: white;
  padding: 15px 20px;
  text-align: left;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-size: 0.95rem;
}

.specs-table td {
  padding: 15px 20px;
  border-bottom: 1px solid var(--atc-border);
  font-size: 0.95rem;
  line-height: 1.6;
  color: #4a4a4a;
  letter-spacing: 0.02em;
}

.specs-table td:first-child {
  font-weight: 500;
  background: var(--atc-light-gray);
  width: 40%;
  color: #3a3a3a;
}

.specs-table tr:last-child td {
  border-bottom: none;
}

.products-list-section {
  padding: 80px 0;
  background: white;
}

.category-title {
  font-size: 1.5em;
  color: var(--atc-primary);
  margin: 50px 0 30px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--atc-accent);
  font-weight: 500;
  letter-spacing: 0.03em;
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 30px;
  margin-bottom: 60px;
}

.product-card {
  text-decoration: none;
  transition: transform 0.3s;
  display: block;
  background: var(--atc-light-gray);
  border-radius: 5px;
  overflow: hidden;
  padding: 20px;
  text-align: center;
}

.product-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.product-image-wrapper {
  background: white;
  padding: 20px;
  margin-bottom: 15px;
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 5px;
}

.product-image-wrapper img {
  max-width: 100%;
  max-height: 160px;
  width: auto;
  height: auto;
  object-fit: contain;
}

.product-image-wrapper.size-rack img {
  max-height: 160px;
  min-height: 100px;
}

.product-card h4 {
  font-size: 1.1em;
  color: var(--atc-primary);
  margin-bottom: 5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.product-specs-label {
  font-size: 0.85em;
  color: #6a6a6a;
  display: block;
  font-weight: 400;
  letter-spacing: 0.02em;
}

.lightbox {
  display: none;
  position: fixed;
  z-index: 10000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.95);
  cursor: pointer;
}

.lightbox-content {
  display: block;
  max-width: 90%;
  max-height: 90%;
  margin: auto;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.lightbox-close {
  position: absolute;
  right: 35px;
  top: 15px;
  color: white;
  font-size: 40px;
  font-weight: 300;
  cursor: pointer;
  z-index: 10001;
  transition: color 0.3s;
}

.lightbox-close:hover {
  color: var(--atc-accent);
}

.lightbox-caption {
  position: absolute;
  bottom: 15px;
  left: 50%;
  transform: translateX(-50%);
  color: white;
  background: rgba(0, 0, 0, 0.7);
  padding: 10px 20px;
  border-radius: 3px;
  font-size: 14px;
  letter-spacing: 0.02em;
}

.variant-selector {
  background: white;
  padding: 40px 0;
  border-bottom: 3px solid var(--atc-accent);
}

.variant-item {
  cursor: pointer;
  transition: transform 0.3s, box-shadow 0.3s;
  border-radius: 5px;
  overflow: hidden;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  margin-bottom: 20px;
}

.variant-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
}

.variant-item:hover .scm-type,
.variant-item:hover .variant-type {
  background: var(--atc-primary-light);
}

.video-container {
  margin: 20px 0;
  border-radius: 5px;
  overflow: hidden;
}

.video-container video {
  width: 100%;
  height: auto;
  display: block;
}

.scm-type,
.variant-type {
  text-align: center;
  padding: 15px;
  background: var(--atc-primary);
  color: white;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 1px;
  transition: background 0.3s;
}

.lifestyle {
  position: relative;
  overflow: hidden;
  background: #f5f5f5;
  aspect-ratio: 16 / 9;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lifestyle img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.lifestyle video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.padding_40px {
  height: 40px;
}

.flex-box {
  display: flex;
  gap: 20px;
  margin: 30px 0;
}

.flex-item-50 {
  flex: 1;
}

@media (max-width: 1024px) {
  .product-showcase {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .product-gallery-wrapper {
    position: static;
  }
}

@media (max-width: 768px) {
  .dropdown-menu {
    display: none !important;
  }

  .dropdown-toggle::after {
    display: none;
  }

  .nav-dropdown>a {
    cursor: pointer;
  }

  .brand-nav {
    padding: 10px 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  }

  .brand-nav-wrapper {
    padding: 0 10px;
  }

  .brand-nav-menu {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
  }

  .brand-nav-menu>li {
    flex: 0 0 auto;
  }

  .brand-nav-menu>li>a {
    display: inline-block;
    padding: 10px 15px;
    font-size: 0.85em;
    border: 1px solid var(--atc-border);
    border-radius: 25px;
    background: var(--atc-white);
    color: #4a4a4a;
    font-weight: 600;
    letter-spacing: 0.3px;
    transition: all 0.3s;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.08);
  }

  .brand-nav-menu>li>a:hover,
  .brand-nav-menu>li>a:active {
    background: var(--atc-light-gray);
    color: var(--atc-accent);
    border-color: var(--atc-accent);
    transform: translateY(-1px);
    box-shadow: 0 3px 8px rgba(0, 0, 0, 0.12);
  }

  .brand-nav-menu>li>a.active {
    background: var(--atc-accent);
    color: white;
    border-color: var(--atc-accent);
    box-shadow: 0 2px 8px rgba(204, 0, 0, 0.2);
  }

  .store-link {
    background: var(--atc-accent) !important;
    color: white !important;
    border-color: var(--atc-accent) !important;
    padding: 10px 20px !important;
    margin-left: 0;
    font-size: 0.85em;
    box-shadow: 0 2px 8px rgba(204, 0, 0, 0.2);
  }

  .store-link:hover {
    background: #990000 !important;
    border-color: #990000 !important;
    transform: translateY(-1px);
    box-shadow: 0 3px 10px rgba(204, 0, 0, 0.3);
  }

  .hero-section {
    padding: 100px 0 60px;
  }

  .product-hero {
    padding: 100px 0 40px;
  }

  .hero-content {
    padding: 0 20px;
  }

  .product-hero-header {
    padding: 0 20px;
    padding-top: 20px;
  }

  .brand-logo-hero-wrapper {
    margin-bottom: 25px;
    margin-top: 10px;
  }

  .brand-logo-hero {
    height: 60px;
  }

  .hero-title {
    font-size: 1.6em;
    line-height: 1.3;
    margin-bottom: 15px;
    letter-spacing: 1px;
  }

  .hero-subtitle {
    font-size: 1em;
    line-height: 1.4;
    margin-bottom: 30px;
  }

  .product-hero h1 {
    font-size: 1.8em;
    line-height: 1.2;
    letter-spacing: 1px;
  }

  .product-tagline {
    font-size: 1em;
  }

  .brand-logo-product {
    height: 40px;
  }

  .atc-main .section-title {
    font-size: 1.8em;
    line-height: 1.3;
    letter-spacing: 1px;
    margin-bottom: 15px;
  }

  .atc-main .section-subtitle {
    font-size: 1em;
    line-height: 1.5;
  }

  .cta-buttons {
    flex-direction: column;
    width: 100%;
    max-width: 300px;
    margin: 30px auto 0;
  }

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

  .btn-large {
    padding: 12px 30px;
    font-size: 1em;
  }

  .featured-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .products-grid {
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 20px;
  }

  .amplifier-grid,
  .dimensions-grid {
    grid-template-columns: 1fr;
  }

  .product-cta {
    flex-direction: column;
  }

  .flex-box {
    flex-direction: column;
  }

  .specs-table {
    font-size: 0.9em;
  }

  .specs-table th,
  .specs-table td {
    padding: 10px 15px;
  }
}

@media (max-width: 480px) {
  .brand-nav {
    padding: 8px 0;
  }

  .brand-nav-wrapper {
    padding: 0 8px;
  }

  .brand-nav-menu {
    gap: 6px;
  }

  .brand-nav-menu>li>a {
    padding: 8px 12px;
    font-size: 0.75em;
    letter-spacing: 0;
  }

  .store-link {
    padding: 8px 16px !important;
    font-size: 0.75em;
  }

  .hero-section {
    padding: 90px 0 50px;
  }

  .product-hero {
    padding: 110px 0 40px;
  }

  .product-hero-header {
    padding-top: 25px;
  }

  .brand-logo-hero-wrapper {
    margin-top: 15px;
  }

  .brand-logo-hero {
    height: 70px;
  }

  .hero-title {
    font-size: 1.4em;
  }

  .product-hero h1 {
    font-size: 1.5em;
  }

  .atc-main .section-title {
    font-size: 1.5em;
  }

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

  .product-image-wrapper {
    height: 180px;
  }

  .product-image-wrapper img {
    max-height: 140px;
  }

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

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

  .specs-table {
    font-size: 0.85em;
  }

  .specs-table th,
  .specs-table td {
    padding: 8px 10px;
  }
}

@media (max-width: 375px) {
  .product-hero {
    padding: 115px 0 35px;
  }

  .brand-logo-hero {
    height: 65px;
  }

  .product-hero h1 {
    font-size: 1.3em;
  }
}