/* dot OKINAWA — sp.css（767px以下） */
@media (max-width: 767px) {
  :root { --header-h: 56px; }
  .site-header { backdrop-filter: none; -webkit-backdrop-filter: none; background: var(--c-white); }
  .logo { font-size: 21px; }
  .pc { display: none; }

  .menu-btn { position: relative; width: 44px; height: 44px; margin-right: -10px; }
  .menu-btn span { position: absolute; left: 11px; width: 22px; height: 2px; background: var(--c-ink); transition: transform .25s, opacity .25s; }
  .menu-btn span:nth-child(1) { top: 15px; }
  .menu-btn span:nth-child(2) { top: 21px; }
  .menu-btn span:nth-child(3) { top: 27px; }
  .menu-btn[aria-expanded="true"] span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
  .menu-btn[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .menu-btn[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }
  .gnav {
    position: fixed; top: var(--header-h); left: 0; right: 0; bottom: 0;
    background: var(--c-white); padding: 16px 20px 40px; overflow-y: auto;
    visibility: hidden; opacity: 0; transform: translateY(-8px); transition: opacity .25s, transform .25s, visibility .25s;
  }
  .gnav.is-open { visibility: visible; opacity: 1; transform: none; }
  .gnav li { border-bottom: 1px solid var(--c-line); }
  .gnav a { display: block; padding: 16px 4px; font-size: 16px; }
  body.nav-open { overflow: hidden; }

  .sec { padding: 56px 0; }
  .sec-h { font-size: 22px; margin-bottom: 28px; }
  .sec-lead { text-align: left; margin-top: -10px; font-size: 15px; }

  .hero { min-height: 82svh; display: flex; align-items: flex-end; }
  .hero-copy { padding: 0 20px 56px; }
  .hero-title { font-size: 38px; }
  .hero-lead { font-size: 14px; }

  .cards { gap: 20px; }
  .cards-sm { grid-template-columns: 1fr 1fr; gap: 12px; }
  .cards-sm .card-body { padding: 10px 12px 14px; }
  .cards-sm .card-meta { font-size: 11px; gap: 6px; }
  .cards-sm .card-meta .chip { display: none; }
  .cards-sm .card-title { font-size: 13px; }
  .theme-tiles { grid-template-columns: 1fr 1fr; gap: 10px; }
  .theme-tile { min-height: 96px; padding: 14px; }
  .tt-name { font-size: 15px; }
  .cta-box { padding: 24px 20px; }

  .page-head { padding: 20px 0 32px; margin-bottom: 32px; }
  .page-title { font-size: 24px; }

  .article-hero img { height: 75vw; }
  .layout { padding: 0 20px; }
  .article-title { font-size: 23px; }
  .post-body { font-size: 16px; }
  .post-body h2 { font-size: 19px; padding: 12px 14px; }
  .gallery { gap: 6px; }
  .course dl div { grid-template-columns: 6em 1fr; }
  .sidebar { margin-top: 48px; }
  .related { padding: 48px 0; margin-top: 56px; }

  .site-footer { padding-top: 44px; }
  .site-footer .inner { grid-template-columns: 1fr 1fr; gap: 28px 16px; }
  .foot-brand { grid-column: 1 / -1; }
}