#sdPageBack{position:fixed;top:max(10px,env(safe-area-inset-top));left:max(10px,env(safe-area-inset-left));width:42px;height:42px;display:grid;place-items:center;z-index:85;background:#fffffff0;color:#1e3a5f;border:1px solid #dbe3ef;border-radius:13px;box-shadow:0 4px 16px #0f172a12;backdrop-filter:blur(12px);cursor:pointer}#sdPageBack:hover{background:#eef6ff;border-color:#93c5fd}#sdPageBack:focus-visible{outline:3px solid #60a5fa;outline-offset:2px}@media print{#sdPageBack{display:none}}