/* Mobile reading rhythm shared by all musculoskeletal chapters.
   The complete text remains visible when JavaScript is unavailable. */
.mobile-reading-toggle{display:none}

@media(max-width:900px){
  .scene-copy.mobile-reading-ready>.mobile-reading-extra{display:none}
  .scene-copy.mobile-reading-ready.is-expanded>.mobile-reading-extra{display:block}
  .mobile-reading-toggle{display:flex;width:100%;min-height:48px;margin:18px 0 14px;padding:11px 14px;align-items:center;justify-content:space-between;gap:14px;border:1px solid var(--line);border-radius:0;background:rgba(255,255,255,.78);color:var(--ink);font:inherit;font-size:12px;font-weight:850;text-align:left;cursor:pointer}
  .mobile-reading-toggle::after{content:'＋';flex:none;color:var(--coral);font-size:18px;font-weight:500}
  .scene-copy.is-expanded>.mobile-reading-toggle::after{content:'−'}
  .mobile-reading-toggle b{display:block}
  .mobile-reading-toggle small{display:block;margin-top:3px;color:var(--copy);font-size:10px;font-weight:650;line-height:1.45}
  .scene-copy>.takeaway{margin-top:18px}
}