/* One back control across About, work-in-progress and every case study. */
a.portfolio-back {
  position: relative;
  isolation: isolate;
  display: grid;
  place-items: center;
  flex: none;
  width: 52px;
  height: 52px;
  min-height: 52px;
  margin: 0;
  padding: 0;
  border: 0;
  border-radius: 50%;
  color: #bdc314;
  background: #15151599;
  box-shadow: none;
  backdrop-filter: blur(60px);
  -webkit-backdrop-filter: blur(60px);
  overflow: hidden;
}
a.portfolio-back::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: url('assets/dock-grain.svg') 0 0/128px;
  opacity: 0.08;
  pointer-events: none;
}
a.portfolio-back::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: #bdc31424;
  opacity: 0;
  transform: none;
  pointer-events: none;
  transition: opacity var(--motion-settle, 420ms) var(--motion-ease, cubic-bezier(0.42, 0, 0.58, 1));
}
a.portfolio-back:hover,
a.portfolio-back:focus-visible {
  background: #15151599;
  color: #bdc314;
}
a.portfolio-back:hover::after,
a.portfolio-back:focus-visible::after {
  opacity: 1;
  transform: none;
}
a.portfolio-back svg {
  position: relative;
  z-index: 1;
  width: 24px;
  height: 24px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}
@media (prefers-reduced-motion: reduce) {
  a.portfolio-back::after {
    transition: none;
  }
}

:where(button, [role='button'], .button, .btn) {
  position: relative;
  isolation: isolate;
}
:where(button, [role='button'], .button, .btn):not(.reach-trigger):not(.menu-reach):not(
    .case-section-toggle
  )::after {
  content: '';
  position: absolute;
  z-index: 3;
  inset: 0;
  border-radius: inherit;
  background: #bdc31424;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--motion-settle, 420ms) var(--motion-ease, cubic-bezier(0.42, 0, 0.58, 1));
}
@media (hover: hover) {
  :where(button, [role='button'], .button, .btn):not(.reach-trigger):not(.menu-reach):not(
      .case-section-toggle
    ):hover::after {
    opacity: 1;
  }
}
:where(button, [role='button'], .button, .btn):not(.reach-trigger):not(.menu-reach):not(
    .case-section-toggle
  ):focus-visible::after {
  opacity: 1;
}
@media (prefers-reduced-motion: reduce) {
  :where(button, [role='button'], .button, .btn)::after {
    transition: none;
  }
}

.back-anchor {
  display: block;
  flex: none;
  width: 52px;
  height: 52px;
}
@media (max-width: 900px) {
  :root a.portfolio-back.mobile-back {
    --back-pinned-top: 16px;
    position: fixed;
    z-index: 3400;
    left: var(--back-inline-start, 20px);
    top: max(var(--back-top, 24px), env(safe-area-inset-top));
    transform: none;
    will-change: transform, opacity;
    opacity: 1;
    transition:
      transform var(--motion-settle, 420ms) var(--motion-ease),
      opacity var(--motion-fast, 240ms) var(--motion-ease),
      box-shadow var(--motion-settle, 420ms) var(--motion-ease);
  }
  :root a.portfolio-back.mobile-back.scroll-back:not(.is-shown) {
    transform: translateY(calc(-100% - 32px - env(safe-area-inset-top)));
    opacity: 0;
    pointer-events: none;
  }
}
@media (prefers-reduced-motion: reduce) {
  :root a.portfolio-back.mobile-back {
    transition: none;
  }
}