/* ManualeReef Atlas v281 — keyboard accessible back-to-top */
.atlas-backtop{position:fixed;right:max(18px,env(safe-area-inset-right));bottom:calc(24px + env(safe-area-inset-bottom));z-index:995;display:flex;align-items:center;justify-content:center;gap:8px;padding:11px 15px;color:#fff;background:#05263e;border:1px solid #09b4d5;border-radius:999px;box-shadow:0 6px 20px #001b3355;font:600 13px/1.3 system-ui,-apple-system,Segoe UI,Arial,sans-serif;cursor:pointer;opacity:0;transform:translateY(12px);visibility:hidden;pointer-events:none;transition:opacity .2s ease,transform .2s ease,visibility .2s}
.atlas-backtop.is-visible{opacity:1;transform:none;visibility:visible;pointer-events:auto}
.atlas-backtop:hover,.atlas-backtop:focus-visible{background:#086387;outline:2px solid #eebc4e;outline-offset:3px}
.atlas-backtop-arrow{font-size:18px;line-height:1;aria-hidden:true}
body:has(.atlas-modal.open) .atlas-backtop,body:has([role="dialog"][aria-modal="true"]:not([hidden])) .atlas-backtop{visibility:hidden!important;pointer-events:none!important}
@media(max-width:767px){.atlas-backtop{right:14px;bottom:calc(85px + env(safe-area-inset-bottom));width:46px;height:46px;padding:0;border-radius:50%;font-size:0}.atlas-backtop-label{position:absolute;clip:rect(0,0,0,0);clip-path:inset(50%);width:1px;height:1px;overflow:hidden;white-space:nowrap}.atlas-backtop-arrow{font-size:23px}}
@media(prefers-reduced-motion:reduce){.atlas-backtop{transition:none}}