.ynf-tool{
  direction: rtl;
  max-width: 820px;
  margin: 24px auto;
  padding: 16px;
  border: 1px solid #e8e8e8;
  border-radius: 14px;
  background: #fff;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
}
.ynf-form{ display: grid; gap: 12px; }
.ynf-card{
  border: 1px solid #eee;
  border-radius: 12px;
  padding: 12px 14px;
  background: #fafafa;
}
.ynf-card legend{ font-weight: 700; padding: 0 6px; }
.ynf-card label{ display:block; margin: 8px 0; cursor:pointer; }
.ynf-actions{ display:flex; gap:10px; flex-wrap:wrap; margin-top: 6px; }
.ynf-btn{
  border: 0;
  border-radius: 12px;
  padding: 10px 14px;
  cursor: pointer;
  font-weight: 700;
  background: #111;
  color: #fff;
}
.ynf-btn.ghost{ background:#efefef; color:#111; }
.ynf-result{
  margin-top: 16px;
  padding: 14px;
  border-radius: 12px;
  border: 1px solid #eee;
  background: #fff;
}
.ynf-tips{ margin: 8px 0 0; padding-right: 18px; }
.ynf-error{ color: #b00020; }