/* Site navigation only; the study keeps its original layout and simulations. */
.sprite-study-page { --header-height: 84px; }
.visually-hidden { position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.skip-link { position: fixed; left: 1rem; top: -5rem; z-index: 100; padding: .75rem 1rem; background: var(--parchment); color: var(--ink); }
.skip-link:focus { top: 1rem; }
.site-header {
  position: absolute;
  inset: 0 0 auto;
  z-index: 20;
  height: var(--header-height);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 0 max(24px, calc((100vw - 1180px) / 2));
  border-bottom: 1px solid rgba(233, 223, 202, 0.12);
  background: linear-gradient(180deg, rgba(5, 6, 7, 0.68), transparent);
}

.brand { justify-self: start; display: inline-flex; align-items: center; gap: .8rem; }
.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  aspect-ratio: 1;
  border: 1px solid var(--gold);
  transform: rotate(45deg);
  color: var(--gold-bright);
  font: 600 .78rem var(--serif);
}
.brand-mark::first-line { transform: rotate(-45deg); }
.brand-copy { display: grid; line-height: 1.05; text-transform: uppercase; letter-spacing: .11em; }
.brand-copy strong { color: var(--parchment); font: 600 .86rem var(--serif); }
.brand-copy small { margin-top: .25rem; color: var(--parchment-muted); font-size: .52rem; letter-spacing: .22em; }
.site-nav { display: flex; align-items: center; gap: 2rem; }
.site-nav > a, .nav-menu-trigger { position: relative; padding: 1.9rem 0; border: 0; color: rgba(233, 223, 202, .68); background: transparent; font-size: .76rem; font-weight: 600; letter-spacing: .12em; text-transform: uppercase; cursor: pointer; }
.site-nav > a:hover, .site-nav > a.is-active, .nav-menu-trigger:hover, .nav-menu.is-active > .nav-menu-trigger { color: var(--parchment); }
.site-nav > a.is-active::after, .nav-menu.is-active::after { content: ""; position: absolute; inset: auto 0 0; height: 2px; background: var(--gold); box-shadow: 0 0 14px rgba(202,164,91,.75); }
.nav-menu { position: relative; align-self: stretch; display: grid; align-items: center; }
.nav-menu-trigger { display: inline-flex; align-items: center; gap: .55rem; }
.nav-menu-trigger > span { width: 6px; height: 6px; margin-top: -.2rem; border-right: 1px solid currentColor; border-bottom: 1px solid currentColor; transform: rotate(45deg); transition: transform .2s ease; }
.nav-menu:hover .nav-menu-trigger > span, .nav-menu:focus-within .nav-menu-trigger > span, .nav-menu.is-open .nav-menu-trigger > span { transform: translateY(3px) rotate(225deg); }
.nav-submenu { position: absolute; top: calc(100% - 1px); left: 50%; display: grid; width: 230px; padding: .55rem; border: 1px solid var(--line); background: rgba(9,11,12,.98); box-shadow: 0 22px 55px rgba(0,0,0,.48); opacity: 0; visibility: hidden; pointer-events: none; transform: translate(-50%, -8px); transition: opacity .18s ease, transform .18s ease, visibility .18s; }
.nav-menu:hover .nav-submenu, .nav-menu:focus-within .nav-submenu, .nav-menu.is-open .nav-submenu { opacity: 1; visibility: visible; pointer-events: auto; transform: translate(-50%, 0); }
.nav-submenu > a, .nav-submenu-pending { display: flex; align-items: center; justify-content: space-between; min-height: 42px; padding: .65rem .75rem; color: rgba(233,223,202,.68); font-size: .68rem; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; }
.nav-submenu > a:hover, .nav-submenu > a:focus-visible, .nav-submenu > a.is-active { color: var(--parchment); background: rgba(202,164,91,.08); }
.nav-submenu > a.is-active { color: var(--gold-bright); }
.nav-submenu-pending { color: rgba(233,223,202,.3); cursor: default; }
.nav-submenu-pending small { color: rgba(202,164,91,.45); font-size: .48rem; letter-spacing: .08em; }
.language-switch { justify-self: end; display: inline-flex; align-items: baseline; padding: .5rem 0; font-size: .7rem; font-weight: 600; letter-spacing: .12em; }
.language-switch a { transition: color .2s ease; }
.language-switch a.language-muted:hover, .language-switch a.language-muted:focus-visible { color: var(--parchment); }
.language-divider { margin-inline: .45rem; color: var(--gold-dark); }
.language-muted { color: rgba(233,223,202,.38); }
.nav-toggle { display: none; }

@media (max-width: 760px) {
  .sprite-study-page { --header-height: 72px; }
  .site-header { grid-template-columns: 1fr auto auto; padding-inline: 16px; }
  .nav-toggle { display: grid; gap: 6px; width: 42px; height: 42px; margin-right: .5rem; place-content: center; border: 1px solid var(--line-soft); background: rgba(9,11,12,.4); }
  .nav-toggle span { display: block; width: 18px; height: 1px; background: var(--parchment); }
  .site-nav { position: absolute; top: var(--header-height); inset-inline: 0; display: none; padding: 1rem 16px 1.5rem; background: rgba(9,11,12,.97); border-bottom: 1px solid var(--line); }
  .site-nav.is-open { display: grid; gap: 0; }
  .site-nav > a, .nav-menu-trigger { width: 100%; padding: .75rem 0; text-align: left; }
  .site-nav > a.is-active::after, .nav-menu.is-active::after { display: none; }
  .nav-menu { width: 100%; }
  .nav-menu-trigger { justify-content: space-between; }
  .nav-submenu { position: static; display: none; width: 100%; margin: 0 0 .5rem; padding: .35rem 0 .35rem .8rem; border-width: 0 0 0 1px; box-shadow: none; opacity: 1; visibility: visible; pointer-events: auto; transform: none; transition: none; }
  .nav-menu.is-open .nav-submenu { display: grid; transform: none; }
  .nav-submenu > a, .nav-submenu-pending { min-height: 38px; padding: .5rem .7rem; }
  .brand-copy { display: none; }
}

.sprite-study-page .site-header a:hover { text-decoration: none; }
.sprite-study-page .site-nav .nav-submenu { width: 285px; }
.sprite-study-page footer nav { width: var(--shell); margin: 1.5rem auto 0; display: flex; flex-wrap: wrap; gap: .75rem 1.5rem; }
@media (max-width: 760px) {
  .sprite-study-page .site-nav .nav-submenu { width: 100%; }
}