.captcha { 
  width: 320px;
  font-family: sans-serif;
  margin: 0 auto;
}
.captcha h3 {
  background-color: #1a73e8;
  color: #fff;
  padding: 8px 12px;
  border-radius: 2px;
}
.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 4px;
}
.cell {
  padding: 0;
  border: 4px solid transparent;
  cursor: pointer;
}
.cell img {
  width: 100px;
  height: 100px;
  display: block;
  overflow: hidden;
  object-fit: cover;  /* crop */
}
.cell.selected {
  border-color: #4a90e2;
}
.verify {
  background-color: #1a73e8;
  color: #fff;
  border: none;
  padding: 0.5rem 1rem;
  display: block;
  margin: 1rem auto;
  font-size: 120%;
}
.progress_bar_text {
  display: block;
  font-family: sans-serif;
  margin: 0 auto;
  text-align: center;
  margin-top: 0rem;
  margin-bottom: 2rem;
  font-size: 100%;
}
.progress {
  width: 320px;
  height: 10px;
  background: #e0e0e0;
  border-radius: 5px;
  overflow: hidden;
  margin: 0rem auto;
  margin-top: 3rem;
}
.progress-fill {
  height: 100%;
  width: 0%;
  background: #b20000;;
  transition: width 0.3s ease;
}