.ui-help {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  min-height: 32px;
  margin-inline-start: 4px;
  padding: 0;
  vertical-align: middle;
  border: 1px solid var(--brd, #777);
  border-radius: 50%;
  background: var(--bg2, #fff);
  color: var(--acc, #234bb0);
  font: bold 15px Georgia, serif;
  cursor: pointer;
}
.ui-help:focus-visible { outline: 3px solid var(--acc, #234bb0); outline-offset: 3px; }
.est-drv[role="button"]:focus-visible { outline: 3px solid var(--acc, #234bb0); outline-offset: 3px; }
.ui-help-dialog {
  box-sizing: border-box;
  width: min(480px, calc(100vw - 32px));
  max-height: calc(100dvh - 32px);
  overflow: auto;
  padding: 24px;
  border: 1px solid var(--brd, #777);
  border-radius: 12px;
  background: var(--bg2, #fff);
  color: var(--tx, #172334);
  box-shadow: 0 16px 60px #0005;
}
.ui-help-dialog::backdrop { background: #0007; }
.ui-help-dialog h2 { margin: 0 0 12px; font-size: 18px; }
.ui-help-dialog p { font-size: 15px; line-height: 1.6; white-space: pre-line; overflow-wrap: anywhere; }
.ui-help-dialog button { min-height: 44px; min-width: 72px; }
@media (pointer: coarse) { .ui-help { width: 44px; min-height: 44px; } }