/* 28/10-09: shared back-to-top control. */
body>.sot-back-to-top{position:fixed;right:20px;bottom:calc(20px + env(safe-area-inset-bottom,0px));z-index:1100;display:grid;place-items:center;width:48px;height:48px;padding:0;border:1px solid rgba(91,197,239,.65);border-radius:50%;background:rgba(7,21,34,.28);color:#e2f8ff;box-shadow:0 3px 12px #0003;cursor:pointer;line-height:1;touch-action:manipulation}
body>.sot-back-to-top[hidden]{display:none!important}
body>.sot-back-to-top:hover{background:rgba(7,21,34,.52)}
body>.sot-back-to-top:focus-visible{outline:3px solid #fff;outline-offset:4px;box-shadow:0 0 0 7px #007fad}
body>.sot-back-to-top svg{display:block;width:22px;height:22px;pointer-events:none;filter:drop-shadow(0 1px 2px rgba(0,0,0,.9))}
@media(max-width:760px){body>.sot-back-to-top{right:16px}}