/* assets/css/demo-shell.css: the shared shell for demo pages (spec section 8.20).
   Shell layout only. It defines no tokens: it reads the page's own :root (section 7.1, 7.11). */

/* Utilities the shell and the page share */
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
           overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.prefix { color: var(--amber); white-space: pre; }   /* section 7.10 */
:focus-visible { outline: 2px solid var(--focus); outline-offset: 3px; border-radius: 4px; }
.demo-links a:focus-visible, .demo-source a:focus-visible, .footer-links a:focus-visible { outline-offset: 2px; }
main:focus { outline: none; }

/* Skip link (as site.css, with tokens) */
.skip-link {
  position: absolute; left: var(--space-4); top: -48px; z-index: var(--z-skip);
  padding: var(--space-2) var(--space-3); border-radius: var(--radius-sm);
  background: var(--amber); color: var(--bg); text-decoration: none;
}
.skip-link:focus { top: var(--space-3); }

/* Header row: crumb left, links right. Not sticky. */
.demo-shell { border-bottom: 1px solid var(--border); }
.demo-shell-inner, .demo-foot-inner {
  max-width: var(--container-demo); margin: 0 auto; padding-left: var(--gutter); padding-right: var(--gutter);
}
.demo-shell-inner {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: var(--space-2) var(--space-4); min-height: 52px;
}
.demo-crumb { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-2); margin: 0; font: 500 var(--fs-sm) var(--mono); }
.demo-sep { color: var(--dim); }
.demo-name { color: var(--text); }
.demo-links { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-1) var(--space-5); font-size: var(--fs-sm); }
.demo-back, .demo-links a, .demo-source a, .footer-links a {
  display: inline-flex; align-items: center; min-height: 24px;
  color: var(--muted); text-decoration: none;
  transition: color var(--dur-fast) var(--ease-out);
}
.demo-back:hover, .demo-links a:hover, .demo-source a:hover, .footer-links a:hover { color: var(--text); }
.demo-back:active, .demo-links a:active, .demo-source a:active { color: var(--amber); }
.demo-links .demo-resume {   /* as .nav-resume, section 8.1 */
  min-height: 36px; padding: 0 14px; border: 1px solid var(--amber-line); border-radius: var(--radius);
  color: var(--amber); font-weight: 500;
  transition: background-color var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out);
}
.demo-links .demo-resume:hover { background: var(--amber-wash); color: var(--amber-hi); }
.demo-links .demo-resume:active { background: rgba(255, 180, 84, 0.16); }

/* How it works */
.demo-how { max-width: var(--container-post); margin: var(--space-8) 0 0; padding-top: var(--space-6); border-top: 1px solid var(--border); }
.demo-how h2 { margin: 0 0 var(--space-3); font-size: var(--fs-sm); font-weight: 600; }
.demo-how ul:not(.chips) { margin: 0 0 var(--space-4); padding-left: 1.1em; color: var(--soft); }
.demo-how ul:not(.chips) li { margin: 5px 0; }
.demo-how ul:not(.chips) li::marker { color: var(--faint); }
.demo-how p a, .demo-how li a { color: var(--muted); }
.demo-source { display: flex; flex-wrap: wrap; gap: var(--space-1) var(--space-5); margin: var(--space-4) 0 0; font-weight: 500; }

/* Chips (as section 8.10): the version chip */
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin: 0; padding: 0; list-style: none; }
.chips li {
  padding: 3px 9px; border: 1px solid var(--border); border-radius: var(--radius-pill);
  background: var(--bg-2); color: var(--soft); font: var(--fs-xs) / 1.5 var(--mono);
  white-space: normal; overflow-wrap: anywhere;
}

/* Footer */
.demo-foot { margin-top: var(--space-8); border-top: 1px solid var(--border); color: var(--muted); font-size: var(--fs-sm); }
.demo-foot-inner {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: var(--space-3) var(--space-6); padding-top: var(--space-6); padding-bottom: var(--space-7);
}
.demo-foot p { margin: 0; }
.demo-foot p > a { color: var(--muted); }   /* running text: keeps its underline */
.demo-foot p > a:hover { color: var(--text); }
.footer-links { display: flex; flex-wrap: wrap; gap: 0 var(--space-6); }

@media (max-width: 640px) {
  .demo-shell-inner { flex-direction: column; align-items: flex-start; gap: 0; padding-top: var(--space-1); padding-bottom: var(--space-1); }
  .demo-back, .demo-links a, .demo-source a, .footer-links a, .demo-links .demo-resume { min-height: 44px; }
  .demo-foot-inner { flex-direction: column; align-items: flex-start; }
}