/* A shorter, product-first reading path for narrow screens. */
@media (min-width: 651px) {
  .feature-disclosure > summary,
  .abs-disclosure > summary { display: none; }
}

@media (max-width: 650px) {
  html { scroll-padding-top: 76px; }
  header { min-height: 64px; padding: 10px 16px; align-items: center; gap: 8px; }
  header .brand { font-size: 21px; }
  header .brand span { margin-top: 5px; font-size: 9px; letter-spacing: .6px; }
  header nav { gap: 8px; }
  header .nav-cta { display: inline-flex; min-height: 40px; padding: 7px 12px; font-size: 13px; }
  .language-switch { gap: 6px; }
  .language-switch a { font-size: 14px; }

  .hero { padding: 0 16px 18px; margin: 0; text-align: left; }
  .hero-copy { padding: 24px 0 15px; }
  .hero .eyebrow { margin: 0 0 9px; font-size: 12px; letter-spacing: .08em; }
  .hero-copy h1 { max-width: 12em; margin: 0 0 11px; font-size: clamp(30px, 8vw, 38px); line-height: 1.15; letter-spacing: -.04em; }
  .hero .intro { max-width: 28em; margin: 0; color: #444449; font-size: 16px; line-height: 1.55; }
  .hero .actions { display: flex; align-items: flex-start; gap: 7px; margin-top: 17px; }
  .hero .actions .text-link { min-height: 46px; padding: 11px 22px; border-radius: 25px; background: #0071e3; color: #fff; font-size: 15px; font-weight: 600; }
  .hero .actions .button { min-height: 44px; padding: 9px 4px; background: transparent; color: #0066cc; font-size: 15px; }
  .hero-note, .image-label { display: none; }
  .hero-visual { width: 100%; height: auto; padding: 0; }
  .hero-visual img { width: 100%; height: 210px; max-height: none; border-radius: 16px; object-fit: cover; object-position: center; }
  .concept-note { margin: 8px 0 0; padding: 0 2px; color: #59595e; font-size: 12px; line-height: 1.45; }
  .feature-disclosure { width: 100%; margin-top: 8px; text-align: left; }
  .feature-disclosure > summary { width: max-content; max-width: 100%; min-height: 40px; padding: 8px 2px; color: #0066cc; font-size: 14px; font-weight: 600; cursor: pointer; }
  .feature-disclosure > summary:focus-visible,
  .abs-disclosure > summary:focus-visible { outline: 3px solid #0071e3; outline-offset: 2px; }
  .feature-disclosure .featured-details { gap: 4px; padding: 8px 0; }
  .feature-disclosure .featured-details article { padding: 9px 0; }
  .feature-disclosure .featured-details h3 { font-size: 17px; }
  .feature-disclosure .featured-details p,
  .feature-disclosure .sample-note { color: #444449; font-size: 15px; line-height: 1.55; }

  #collection { padding: 25px 16px 23px; }
  #collection .section-heading { margin-bottom: 15px; }
  #collection .section-heading .eyebrow,
  #collection .section-heading > p { display: none; }
  #collection .section-heading h2 { margin: 0; font-size: 27px; line-height: 1.2; letter-spacing: -.04em; }
  #collection .products { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
  #collection .products article { min-width: 0; min-height: 0; padding: 9px; border-radius: 17px; background: #f5f5f7; }
  #collection .product-image,
  #collection #acrylic-preview .product-image { height: 106px; max-height: none; padding: 0; aspect-ratio: auto; border-radius: 10px; background: #fff; }
  #collection .product-image img { width: 100%; height: 100%; object-fit: contain; }
  #collection .category-card .index,
  #collection .category-jump > p:not(.index),
  #collection .acrylic-intro > p:not(.index),
  #collection .preview-action,
  #collection .category-card > a:not(.category-jump) { display: none !important; }
  #collection .category-card h3,
  #collection .acrylic-intro h3 { margin: 10px 4px 4px; color: #1d1d1f; font-size: 17px; line-height: 1.35; letter-spacing: -.02em; }
  #collection .acrylic-intro { padding: 0; }
  #collection .acrylic-intro h3 br { display: none; }
  #collection .acrylic-card { min-height: 0; background: #f5f5f7 !important; color: #1d1d1f; }
  #collection .acrylic-card .category-jump { color: #1d1d1f !important; }
  #collection .catalog-note { margin: 13px 0 0; color: #59595e; font-size: 12px; line-height: 1.45; }

  .abs-showcase, .abs-showcase-alt { padding: 7px 16px; border: 0; background: #fff; scroll-margin-top: 72px; }
  .abs-showcase .section-heading { display: none; }
  .abs-disclosure { border-radius: 17px; background: #f5f5f7; }
  .abs-disclosure > summary { display: flex; align-items: center; gap: 13px; min-height: 94px; padding: 9px; list-style: none; cursor: pointer; }
  .abs-disclosure > summary::-webkit-details-marker { display: none; }
  .abs-disclosure > summary img { width: 90px; height: 75px; flex: none; border-radius: 10px; background: #fff; object-fit: contain; }
  .abs-disclosure > summary span { display: grid; gap: 2px; min-width: 0; }
  .abs-disclosure > summary strong { color: #1d1d1f; font-size: 17px; line-height: 1.3; }
  .abs-disclosure > summary small { color: #59595e; font-size: 13px; font-style: normal; }
  .abs-disclosure > summary em { color: #0066cc; font-size: 14px; font-style: normal; font-weight: 600; }
  .abs-disclosure[open] > summary { border-bottom: 1px solid #dedee2; }
  .abs-disclosure .abs-viewer { gap: 16px; padding: 13px; }
  .abs-disclosure .abs-stage { border-radius: 12px; }
  .abs-disclosure .abs-details h3 { font-size: 27px; letter-spacing: -.035em; }
  .abs-disclosure .abs-description,
  .abs-disclosure .abs-custom-note { color: #444449; font-size: 16px; line-height: 1.6; }
  .abs-disclosure .abs-hint { color: #59595e; font-size: 14px; }

  .catalog { margin: 10px 0; padding: 31px 16px; border-radius: 0; }
  .catalog .section-heading { margin-bottom: 14px; }
  .catalog .section-heading h2 { margin: 0; font-size: 27px; }
  .catalog .section-heading > p { margin: 9px 0 0; color: #444449; font-size: 15px; line-height: 1.5; }
  .catalog-nav { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; margin-bottom: 18px; }
  .catalog-nav a { justify-content: center; font-size: 15px; }
  .catalog-group { padding: 27px 0 19px; }
  .catalog-group-heading > p { color: #59595e; font-size: 14px; }
  .catalog-card-code { font-size: 15px; }
  .floating { display: none; }
}

@media (max-width: 360px) {
  header .brand { font-size: 19px; }
  header .brand span { font-size: 8px; }
  .hero-visual img { height: 185px; }
  #collection .product-image,
  #collection #acrylic-preview .product-image { height: 90px; }
}