.captcha-wrapper img{
  height: 100%;
  object-fit: cover;
  border-radius: 5px;
  opacity: 0.95;
  left: 50%;
  top: 50%;
  width: 100%;
  color: #fff;
  font-size: 35px;
  text-align: center;
  letter-spacing: 10px;
  text-shadow: 0px 0px 2px #b1b1b1;
  font-family: 'Noto Serif', serif;
}

.captcha-wrapper button{
  outline: none;
  border: none;
  color: #4db2ec;
  cursor: pointer;
  background: #fff;
  border-radius: 5px;
  transition: all 0.3s ease;
}
.captcha-wrapper button:hover{
  background: #2fa5e9;
  color: #fff;
}

.captcha-wrapper .reload-btn{
  width: 75px;
  height: 100%;
  font-size: 25px;
  margin-left: 10px;
}
.captcha-wrapper .reload-btn i{
  transition: transform 0.3s ease;
}
.captcha-wrapper .reload-btn:hover i{
  transform: rotate(15deg);
}

/* Hidden overlay */
#loadingOverlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.6);
    display: none; /* initially hidden */
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

/* Simple loading spinner */
#loadingOverlay .loader {
    border: 6px solid #f3f3f3;
    border-top: 6px solid #3498db;
    border-radius: 50%;
    width: 60px;
    height: 60px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}