.back-to-top{position:fixed;right:calc(20px + env(safe-area-inset-right,0px));bottom:calc(20px + env(safe-area-inset-bottom,0px));z-index:45;width:52px;height:58px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;background:#f6faef;color:#153f35;border:1px solid #9bb3a2;border-radius:16px;box-shadow:0 6px 24px #153f3526;text-decoration:none;transition:background .18s ease,box-shadow .18s ease}
.back-to-top span{font-size:10px;font-weight:700;line-height:1.2;letter-spacing:.04em}
.back-to-top:hover{background:#dcebdc;box-shadow:0 8px 26px #153f353b}
.back-to-top:focus-visible{outline:3px solid #087455;outline-offset:4px}
body:has(.back-to-top) .privacy-banner{right:calc(90px + env(safe-area-inset-right,0px))}
@media(max-width:750px){.back-to-top{right:calc(16px + env(safe-area-inset-right,0px));bottom:calc(78px + env(safe-area-inset-bottom,0px));width:48px;height:54px;border-radius:14px}body:has(.back-to-top) .privacy-banner{right:1.5rem;bottom:calc(144px + env(safe-area-inset-bottom,0px))}body:not(:has(.mobile-contact)) .back-to-top{bottom:calc(16px + env(safe-area-inset-bottom,0px))}}
@media(prefers-reduced-motion:reduce){.back-to-top{transition:none}}