dialog.session-guard{box-sizing:border-box;width:calc(100% - 32px);max-width:380px;margin:auto;padding:24px;border:1px solid #ddd;border-radius:12px;background:white;color:#222;font:16px/1.5 Arial,sans-serif;text-align:center;box-shadow:0 12px 48px #0003}
dialog.session-guard::backdrop{background:#0007}
.session-guard p{margin:0 0 12px}.session-guard button{padding:12px 24px;border:0;border-radius:8px;background:#303338;color:white;font:inherit;cursor:pointer}.session-guard button[hidden]{display:none}