/* Plain text, fixed to the reading viewport; keep native dialogs above it. */
.case-step-back{
  position:fixed;right:32px;bottom:max(24px,env(safe-area-inset-bottom));z-index:60;
  display:block;width:auto;height:auto;margin:0;padding:8px 0;
  border:0;border-radius:0;box-shadow:none;background:none;color:#f2f0e8;
  font:300 15px/1.35 ZemuSerif,serif;letter-spacing:.08em;
  text-shadow:0 1px 6px #0009;cursor:pointer;-webkit-tap-highlight-color:transparent;
}
.case-step-back:hover{text-decoration:underline;text-underline-offset:5px}
.case-step-back:focus-visible{outline:1px solid currentColor;outline-offset:5px}
@media(max-width:900px){.case-step-back{right:20px;bottom:max(16px,env(safe-area-inset-bottom));font-size:14px;min-height:44px}}

/* Keep the floating return control on desktop only. */
@media(max-width:900px){.case-step-back{display:none!important}}