@media (max-width: 1100px) {
  .hero-copy,
  .page-hero-copy,
  .welcome-copy,
  .hero-panel,
  .page-hero-visual,
  .welcome-card,
  .product-hero__copy,
  .product-hero__gallery {
    grid-column: 1 / -1;
  }

  .about-card,
  .feature-card,
  .value-card,
  .contact-card,
  .mini-card,
  .product-card,
  .content-grid > *,
  .content-grid--split > * {
    grid-column: span 6;
  }

  .footer-grid > * {
    grid-column: span 6;
  }
}

@media (max-width: 860px) {
  .site-nav {
    position: absolute;
    top: 86px;
    left: 0;
    right: 0;
    display: grid;
    gap: 18px;
    padding: 18px;
    background: rgba(10, 10, 10, 0.96);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.3s ease, opacity 0.3s ease;
  }

  .site-nav.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .site-nav__links {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }

  .language-switcher {
    width: 100%;
    justify-content: space-between;
  }

  .language-switcher__button {
    flex: 1;
    justify-content: center;
  }

  .nav-toggle {
    display: inline-grid;
    place-items: center;
  }

  .header-inner {
    min-height: 80px;
  }

  .hero,
  .page-hero,
  .section {
    padding: 72px 0;
  }

  .hero-copy h1,
  .page-hero-copy h1,
  .welcome-title {
    font-size: clamp(1.7rem, 7.8vw, 2.8rem);
  }

  .product-hero h1 {
    font-size: clamp(1.9rem, 6.2vw, 2.8rem);
    line-height: 1.16;
    letter-spacing: -0.015em;
  }

  .section-heading,
  .hero-actions,
  .inline-actions {
    flex-direction: column;
    align-items: flex-start;
  }

  .gallery-grid,
  .form-grid {
    grid-template-columns: 1fr;
  }

  .gallery-grid--duo .image-frame {
    min-height: 340px;
  }

  .image-frame--main {
    min-height: 460px;
  }

  .product-gallery__thumb img {
    height: 94px;
  }

  .home-carousel {
    padding: 18px;
  }

  .home-carousel__track {
    min-height: 520px;
  }

  .home-carousel__slide {
    grid-template-columns: 1fr;
    align-content: start;
  }

  .home-carousel__media-grid {
    grid-template-columns: 1fr 1fr;
  }

  .home-carousel__media {
    min-height: 280px;
  }

  .home-carousel__media img {
    max-width: 84%;
    max-height: 84%;
  }

  .hero-visual-stack {
    min-height: 300px;
  }

  .hero-visual--front {
    inset: 18px 18px 96px 18px;
  }

  .hero-visual--pack {
    width: 44%;
  }

  .product-lightbox__panel {
    inset: 2vh 2vw;
    border-radius: 18px;
    grid-template-columns: 52px 1fr 52px;
  }

  .product-lightbox__viewport {
    padding: 18px;
  }

  .product-lightbox__nav {
    width: 40px;
    height: 40px;
    font-size: 1.7rem;
  }

  .about-card,
  .feature-card,
  .value-card,
  .contact-card,
  .mini-card,
  .product-card,
  .content-grid > *,
  .content-grid--split > *,
  .footer-grid > * {
    grid-column: 1 / -1;
  }

  .spec-list div {
    flex-direction: column;
    align-items: flex-start;
  }

  .spec-list dd {
    text-align: left;
  }
}

@media (max-width: 540px) {
  .container,
  .welcome-layout {
    width: min(100% - 24px, 100%);
  }

  .header-inner {
    gap: 16px;
  }

  .brand__meta span {
    display: none;
  }

  .brand__mark {
    width: 52px;
    height: 52px;
    border-radius: 0;
  }

  .btn {
    width: 100%;
  }

  .welcome-card,
  .hero-panel,
  .page-hero-visual,
  .content-card,
  .product-card,
  .mini-card,
  .feature-card,
  .value-card,
  .contact-card {
    padding: 22px;
  }

  .image-frame {
    min-height: 200px;
  }

  .gallery-grid--duo .image-frame {
    min-height: 280px;
  }

  .product-hero h1 {
    font-size: clamp(1.65rem, 8vw, 2.15rem);
    line-height: 1.2;
    letter-spacing: -0.01em;
  }

  .image-frame--main {
    min-height: 320px;
  }

  .product-gallery__thumbs {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
  }

  .product-gallery__thumb img {
    height: 80px;
  }

  .home-carousel__track {
    min-height: 430px;
  }

  .home-carousel__media {
    min-height: 220px;
  }

  .home-carousel__media-grid {
    grid-template-columns: 1fr;
  }

  .home-carousel__media img {
    max-width: 86%;
    max-height: 86%;
  }

  .hero-visual-stack {
    min-height: 260px;
  }

  .hero-visual--front {
    inset: 12px 12px 84px 12px;
  }

  .hero-visual--pack {
    width: 48%;
    right: 12px;
    bottom: 12px;
  }

  .showcase-card {
    flex-basis: 180px;
    min-height: 180px;
  }

  .product-lightbox__panel {
    inset: 0;
    border-radius: 0;
    border: 0;
    grid-template-columns: 42px 1fr 42px;
  }

  .product-lightbox__viewport {
    padding: 12px;
  }

  .product-lightbox__toolbar {
    padding-bottom: 14px;
  }

  .product-lightbox__close {
    top: 10px;
    right: 10px;
    width: 38px;
    height: 38px;
  }
}