/* Page-history chevrons share a 44px touch target. Article returns add a
   visible surface below; other pages keep their existing bare controls. */
html:root body [data-back-icon][data-back-icon]{
  display:inline-grid!important;place-items:center!important;
  box-sizing:border-box!important;width:44px!important;height:44px!important;
  min-width:44px!important;min-height:44px!important;padding:0!important;
  border:0!important;border-radius:0!important;text-decoration:none!important;
  background:transparent!important;box-shadow:none!important;
  backdrop-filter:none!important;-webkit-backdrop-filter:none!important;
  color:var(--back-ink,var(--text))!important;
  transform:none!important;transition:color .18s ease,opacity .18s ease!important;
}
html:root body [data-back-icon][data-back-icon]::before,
html:root body [data-back-icon][data-back-icon]::after{content:none!important;display:none!important}
html:root body [data-back-icon][data-back-icon] :is(.ui-icon,svg){width:24px!important;height:24px!important;--ui-icon-size:24px}
html:root body [data-back-icon][data-back-icon] > .ui-icon{transform:translateX(0) scale(1);transition:transform .18s ease}
html:root body [data-back-icon][data-back-icon]:is(:hover,:focus-visible){
  background:transparent!important;box-shadow:none!important;transform:none!important;
  color:var(--back-hover-ink,var(--accent-2))!important;
}
html:root body [data-back-icon][data-back-icon]:is(:hover,:focus-visible) > .ui-icon{transform:translateX(-3px) scale(1.08)}
html:root body [data-back-icon][data-back-icon]:active > .ui-icon{transform:translateX(-2px) scale(.96)}
html:root body [data-back-icon][data-back-icon]:focus-visible{outline:2px solid currentColor!important;outline-offset:2px!important}
/* Keep the article return reachable while reading, below the fixed site header.
   Sticky preserves its space and works inside the blurred reading board. */
html:root body main.container:has([data-article-layout="album"]) > [data-back-icon]{
  position:sticky!important;top:calc(72px + env(safe-area-inset-top,0px));z-index:30;
  border:1.5px solid var(--border)!important;border-radius:999px!important;
  background:rgba(255,242,220,.92)!important;color:var(--accent-2)!important;
  box-shadow:var(--shadow)!important;
}
html:root body main.container:has([data-article-layout="album"]) > [data-back-icon]:is(:hover,:focus-visible){
  background:rgba(246,220,181,.96)!important;color:#6f3f1d!important;
  border-color:var(--accent-2)!important;
  box-shadow:0 18px 42px rgba(87,58,31,.18)!important;
}
/* Match the reading controls' warm light and blue dark surfaces. */
html:root body.dark main.container:has([data-article-layout="album"]) > [data-back-icon]{
  background:rgba(19,43,66,.86)!important;border-color:#2b4360!important;color:#cfe6ff!important;
}
html:root body.dark main.container:has([data-article-layout="album"]) > [data-back-icon]:is(:hover,:focus-visible){
  background:rgba(19,43,66,.96)!important;border-color:#7dd3fc!important;color:#fff!important;
}
@media(max-width:980px){
  html:root body.dark main.container:has([data-article-layout="album"]) > [data-back-icon]:is(:hover,:focus-visible){box-shadow:0 18px 42px rgba(0,0,0,.34)!important}
}
@media(min-width:981px){html:root body main.container:has([data-article-layout="album"]) > [data-back-icon]{margin-left:-96px!important}}
/* Fallback ink for tool returns that have not opted into a panel surface. */
body[data-page-section="tools"]{--back-ink:#fff1d2;--back-hover-ink:#fff}
/* Returns belong to their tool panel, not to the scenery behind it. */
[data-tool-back-surface]{--back-ink:var(--text);--back-hover-ink:var(--accent-2)}
html:root body [data-tool-back-surface] > [data-back-icon]{margin:0 0 12px!important;justify-self:start;align-self:start}
html:root body .tool-detail-surface[data-tool-back-surface] > [data-back-icon]{position:absolute!important;top:24px!important;left:24px!important;right:auto!important;bottom:auto!important;margin:0!important;z-index:10!important}
.focus-main-card[data-tool-back-surface]{--back-ink:var(--focus-ink);--back-hover-ink:var(--accent-2)}
html:root body .focus-main-card[data-tool-back-surface] > [data-back-icon]{position:absolute;top:16px;left:16px;margin:0!important;z-index:5}
.av-stage[data-tool-back-surface]{--back-ink:#f8fafc;--back-hover-ink:#7dd3fc}
html:root body .av-stage[data-tool-back-surface] > [data-back-icon]{position:absolute!important;top:18px!important;left:18px!important;right:auto!important;bottom:auto!important;margin:0!important;z-index:10000!important}
@media(max-width:980px){html:root body .tool-detail-surface[data-tool-back-surface] > [data-back-icon]{top:18px!important;left:18px!important}}
@media(prefers-reduced-motion:reduce){
  html:root body [data-back-icon][data-back-icon],html:root body [data-back-icon][data-back-icon] > .ui-icon{transition:none!important;transform:none!important}
  html:root body [data-back-icon][data-back-icon]:is(:hover,:focus-visible,:active) > .ui-icon{transform:none!important}
}