/* Sit beside the right content edge, above any mobile dock. */
.back-to-top{box-sizing:border-box;position:fixed;z-index:60;right:max(12px,calc((100vw - 1440px) / 2 + 5vw - 60px),env(safe-area-inset-right,0px));left:auto;bottom:calc(24px + env(safe-area-inset-bottom,0px));display:flex;align-items:center;justify-content:center;width:48px;height:48px;margin:0;padding:12px;border:1px solid #dce2e8;border-radius:12px;background:#fff;color:#14263e;box-shadow:0 4px 16px #14263e26;cursor:pointer;touch-action:manipulation}
.back-to-top[hidden]{display:none}
.back-to-top svg{display:block;width:24px;height:24px;flex:none}
.back-to-top:focus-visible{outline:3px solid #879e26;outline-offset:4px}
@media(hover:hover) and (pointer:fine){.back-to-top:hover{background:#ddf56d;border-color:#b9d148}}
@media(max-width:640px){.back-to-top{right:max(12px,env(safe-area-inset-right,0px))}.back-to-top-with-dock{bottom:calc(var(--mobile-nav-height, 74px) + 12px)}}
@media print{.back-to-top{display:none}}