.signature-tool {
  max-width: 500px;
  margin: 20px auto;
  padding: 15px;
  border: 1px solid #ddd;
  border-radius: 8px;
  text-align: center;
  background: #fff;
}
.signature-tool .info {
  font-weight: bold;
  margin: 10px 0;
}
.signature-tool img {
  display: none;
  max-width: 250px;
  max-height: 150px;
  margin: 10px auto;
  border: 1px solid #ccc;
  border-radius: 6px;
}
.signature-tool .kb-options button {
  margin: 4px;
  padding: 8px 12px;
  border-radius: 5px;
  background: #0073aa;
  color: white;
  border: none;
  cursor: pointer;
}
.signature-tool .kb-options button.selected { background: #00a03e; }
#sr-resizeBtn, #sr-downloadLink {
  display: none;
  margin-top: 12px;
  padding: 8px 16px;
  border-radius: 6px;
  font-size: 15px;
  border: none;
}
#sr-resizeBtn { background: #ffb900; color: white; }
#sr-downloadLink { background: #46b450; color: white; text-decoration: none; }