.ex-guide { margin:18px 0; color:var(--ink); }
.ex-pictures { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:12px; max-width:620px; margin:0 auto; }
.ex-pictures:has(.ex-pose:only-child) { grid-template-columns:minmax(0,310px); justify-content:center; }
.ex-pose { margin:0; overflow:hidden; border-radius:12px; background:#def3fd; color:#172f3d; }
.ex-pose img { display:block; width:100%; height:auto; aspect-ratio:1; object-fit:contain; }
.ex-pose figcaption { padding:10px 12px; font:600 13px/1.4 var(--sans); border-top:1px solid #bcd9e8; }
.ex-credit { font:400 11px/1.5 var(--sans); color:var(--ink-2); margin:9px 0 16px; }
.ex-credit a { color:inherit; text-decoration:underline; }
.ex-how,.ex-library-item { border:1px solid var(--border-str); border-radius:10px; background:var(--surface); }
.ex-how summary,.ex-library-item>summary { padding:14px 16px; cursor:pointer; font-weight:600; min-height:48px; }
.ex-how summary:focus-visible,.ex-library-item>summary:focus-visible { outline:2px solid var(--ink); outline-offset:3px; }
.ex-how ol { padding:0 24px 0 38px; margin:14px 0; }
.ex-how li { margin:0 0 10px; line-height:1.65; }
.ex-variant,.ex-safety { margin:12px 16px; font-size:13px; line-height:1.6; color:var(--ink-2); }
.ex-safety { border-top:1px solid var(--border); padding-top:12px; }
.ex-visual-pending,.ex-image-error { padding:14px; font-size:13px; line-height:1.5; }
.ex-library { width:min(760px,calc(100vw - 28px)); max-height:88dvh; overflow-y:auto; background:var(--bg); color:var(--ink); }
.ex-library h2 { margin:5px 0 0; }
.ex-library .help-header { position:sticky; top:-28px; z-index:2; padding:10px 0; background:var(--bg); }
.ex-library .ex-credit { font-size:11px; }
.ex-library .ex-variant,.ex-library .ex-safety { font-size:13px; }
.ex-library input { width:100%; min-height:48px; padding:12px; margin:8px 0; border-radius:8px; border:1px solid var(--border-str); background:var(--surface); color:var(--ink); font:inherit; }
.ex-library-count { color:var(--ink-2); font-size:13px; margin:10px 0 16px; }
.ex-library-list { display:grid; gap:10px; }
.ex-library-item>.ex-guide { padding:0 14px; }
.ex-library-open { margin:4px 0 20px; min-height:44px; }
.ex-enlarge { min-height:44px; margin:0 0 10px; text-decoration:underline; }
@media(max-width:480px) {
  .ex-pictures { gap:7px; }
  .ex-pose figcaption { padding:8px; font-size:11px; }
  .ex-library { padding:18px 14px; }
  .ex-library .help-header { gap:12px; align-items:flex-start; }
  .ex-library .help-header { top:-18px; }
  .ex-library .help-header h2 { font-size:26px; }
  #exercise-detail .ex-pictures { grid-template-columns:minmax(0,1fr); }
}