/* Shared Prism navigation, following the APART landing page's compact pill. */
.prism-header {
  --header-font: var(--font-brand, var(--font-display));
  --header-edge: color-mix(in oklch, var(--color-ink) 18%, var(--color-clear));
  --header-highlight: color-mix(in oklch, var(--color-ink) 10%, var(--color-clear));
  --header-shadow: color-mix(in oklch, var(--color-paper) 70%, var(--color-clear));
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px max(16px, env(safe-area-inset-right)) 12px max(16px, env(safe-area-inset-left));
  background: var(--color-paper);
}
.prism-nav {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  max-width: 100%;
  min-height: 54px;
  padding: 4px 4px 4px 16px;
  border: 1px solid var(--header-edge);
  border-radius: 999px;
  background: var(--color-surface);
  box-shadow: 0 8px 24px var(--header-shadow), inset 0 1px var(--header-highlight);
}
.prism-home {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
  gap: 8px;
  min-height: 44px;
  color: var(--color-ink);
  font: 600 1.25rem/1 var(--header-font);
  letter-spacing: -.04em;
  white-space: nowrap;
}
.prism-home img { width: 26px; height: 26px; flex-shrink: 0; }
.prism-nav-context { padding-inline: 12px 4px; border-left: 1px solid var(--color-rule); font: 400 .875rem/1 var(--font-body); color: var(--color-muted); white-space: nowrap; }
.prism-nav-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  gap: 12px;
  min-height: 44px;
  padding: 10px 16px;
  border: 1px solid var(--color-accent);
  border-radius: 999px;
  background: var(--color-accent);
  color: var(--color-paper);
  font: 500 .875rem/1 var(--font-body);
  white-space: nowrap;
  cursor: pointer;
}
.prism-header :focus-visible { outline: 2px solid var(--color-ink); outline-offset: 3px; }
.paper-page > .prism-header { position: sticky; top: 0; z-index: 30; }
@media (hover: hover) {
  .prism-nav-action:hover { background: var(--color-accent-hover, var(--color-accent)); color: var(--color-paper); }
  .prism-home:hover { color: var(--color-accent); }
}
@media (max-width: 36rem) {
  .prism-nav-context { display: none; }
  .prism-nav { gap: 16px; }
}
@media print { .paper-page > .prism-header { position: static; } }

:is(.paper-page, .signup-page) .prism-nav { padding-inline-end: 16px; }
:is(.paper-page, .signup-page) .prism-nav-context { display: block; padding-inline-end: 0; }