/* Small, local feedback: no layout animation or extra per-frame work. */
:where(a[href], button:not(:disabled)) { -webkit-tap-highlight-color: transparent; }
:where(a[href], button:not(:disabled)):focus-visible {
  outline: 1px solid currentColor;
  outline-offset: 4px;
}
.global-header .nav { gap: 0; padding-inline: 4px; }
.global-header .nav a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  align-self: stretch;
  padding-inline: 9px;
  gap: 8px;
  transition: background-color .22s ease, color .22s ease;
}
.global-header .nav a:focus-visible { outline-offset: -3px; }
.nav__external span { display: inline-block; transition: transform .25s ease; }
.global-header .brand { transition: opacity .25s ease; }
.contact-index__ruler a > span { transition: transform .3s ease; }
.contact-index__external { transition: opacity .25s ease; }
.material-archive__thumb { overflow: hidden; }
.material-archive__thumb img { transition: transform .4s cubic-bezier(.22,1,.36,1); }
.material-timeline__year { transition: color .2s ease; }
.global-advance { transition: background-color .25s ease; }
.global-advance img { transition: transform .3s ease; }
.colony__specimen-button { transition: background-color .25s ease; }
#research-weaving { scroll-margin-top: 80px; }
#laboratory:focus, #research-weaving:focus, #material-archive:focus,
#people:focus, #robot-story:focus, #contact:focus, #home:focus { outline: none; }

@media (hover: hover) and (pointer: fine) {
  .global-header .nav a:hover { background: #000; color: #fff; }
  .global-header .brand:hover { opacity: .65; }
  .nav__external:hover span { transform: translate(2px,-2px); }
  .contact-index__ruler a:hover > span { transform: translateX(3px); }
  .contact-index__external:hover { opacity: .65; }
  .material-archive__thumb:hover img { transform: scale(1.06); }
  .material-timeline__year:hover { color: #000; }
  .material-timeline__year:hover::before { background: #000; }
  .colony__specimen-button:hover { background: #00000008; }
  .global-advance:hover { background: #ffffff36; }
  .global-advance:hover img { transform: translateY(4px) rotate(90deg); }
}
.global-header .nav a:focus-visible { background: #000; color: #fff; }
.material-archive__thumb:focus-visible img { transform: scale(1.06); }
.nav__external:focus-visible span { transform: translate(2px,-2px); }
.global-advance:active img { transform: translateY(6px) rotate(90deg); }

@media (max-width: 1100px) {
  .global-header .nav a { padding-inline: 6px; gap: 4px; }
}
@media (max-width: 700px) {
  .global-header .nav { gap: 0; padding-inline: 2px; }
  .global-header .nav a { padding-inline: 6px; min-height: 32px; }
  #research-weaving { scroll-margin-top: 115px; }
}
@media (prefers-reduced-motion: reduce) {
  .global-header .nav a, .nav__external span, .global-header .brand,
  .contact-index__ruler a > span, .contact-index__external,
  .material-archive__thumb img, .material-timeline__year,
  .global-advance, .global-advance img, .colony__specimen-button { transition: none; }
}