.slider-captcha {
  position: relative;
  width: 100%;
  height: 48px;
  margin-bottom: 20px;
  user-select: none;
}

.slider-captcha-bg {
  position: relative;
  width: 100%;
  height: 48px;
  background: linear-gradient(to right, #f1f1f1 0%, #e0e0e0 100%);
  border-radius: 24px;
  border: 1px solid #ddd;
}

.slider-captcha-text {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  line-height: 48px;
  text-align: center;
  color: #666;
  font-size: 14px;
  z-index: 1;
  border-radius: 24px;
  overflow: hidden;
}

.slider-captcha-slider {
  position: absolute;
  top: 0;
  left: 0;
  width: 48px;
  height: 48px;
  background: #fff;
  border-radius: 50%;
  box-shadow: 0 2px 6px rgba(0,0,0,0.2);
  cursor: pointer;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: left 0.1s;
}

.slider-captcha-slider i {
  font-size: 20px;
  color: #666;
}

.slider-captcha-slider:hover {
  background: #f9f9f9;
}

.slider-captcha-slider.dragging {
  cursor: grabbing;
}

.slider-captcha.filled .slider-captcha-bg {
  background: linear-gradient(to right, #4CAF50 0%, #45a049 100%);
}

.slider-captcha.filled .slider-captcha-text {
  color: #fff;
}

.slider-captcha.filled .slider-captcha-slider {
  background: #4CAF50;
  left: calc(100% - 48px) !important;
}

.slider-captcha.filled .slider-captcha-slider i {
  color: #fff;
}

.slider-captcha-progress {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  background: linear-gradient(to right, #4CAF50 0%, #45a049 100%);
  width: 0;
  border-radius: 24px;
  z-index: 0;
  transition: width 0.05s;
}

.slider-captcha-error {
  position: absolute;
  bottom: -20px;
  left: 0;
  color: #f44336;
  font-size: 12px;
  display: none;
}

.slider-captcha.has-error .slider-captcha-error {
  display: block;
}

.slider-captcha.has-error .slider-captcha-bg {
  border-color: #f44336;
}

#submit-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

#submit-btn:not(:disabled) {
  opacity: 1;
  cursor: pointer;
}

#submit-btn:not(:disabled):hover {
  cursor: pointer;
}