/* v26.1: shared public/admin scroll control */
.portal-backtop{position:fixed;right:88px;bottom:24px;z-index:52;display:flex;align-items:center;justify-content:center;gap:7px;min-width:48px;min-height:48px;padding:9px 15px;border:1px solid #aed4e5;border-radius:999px;background:#fff;color:#145675;box-shadow:0 12px 34px rgba(9,44,68,.18);font:700 13px system-ui,-apple-system,sans-serif;cursor:pointer;line-height:1.2;transition:background .15s,transform .15s}
.portal-backtop[hidden]{display:none!important}.portal-backtop:hover{background:#e4f5fb;transform:translateY(-2px)}.portal-backtop:focus-visible{outline:3px solid #2d90bf;outline-offset:3px}.portal-backtop span:first-child{font-size:23px;line-height:1}
@media(max-width:700px){.portal-backtop{right:15px;bottom:calc(145px + env(safe-area-inset-bottom,0px));min-width:47px;min-height:47px;padding:8px 11px}.portal-backtop .backtop-label{display:none}.admin-body .portal-backtop{bottom:calc(94px + env(safe-area-inset-bottom,0px));z-index:44}}
@media(prefers-reduced-motion:reduce){.portal-backtop{transition:none}}