:root {
  --click-to-call-bg-color: #000000;
  --click-to-call-bg-hover-color: #ffffff;
  --click-to-call-icon-color: #ffffff;
  --click-to-call-icon-hover-color: #000000;
}

.click-to-call {
  position: fixed;
  bottom: 20px;
  right: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 60px;
  height: 60px;
  background-color: var(--click-to-call-bg-color);
  border-radius: 50%;
  transition: background-color 0.3s ease-in-out;
  z-index: 9999;
}

.click-to-call:hover {
  background-color: var(--click-to-call-bg-hover-color);
}

.click-to-call-icon {
  position: relative;
  font-size: 24px;
  color: var(--click-to-call-icon-color);
  transition: color 0.3s ease-in-out;
  z-index: 2;
}

.click-to-call-icon::before {
  content: '\f095';
  font-family: FontAwesome;
  font-weight: normal;
  font-style: normal;
  font-size: 24px;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 3;
}

.click-to-call:hover .click-to-call-icon {
  color: var(--click-to-call-icon-hover-color) !important;
}

.click-to-call-icon-bg {
  position: absolute;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background-color: var(--click-to-call-bg-color);
  transition: background-color 0.3s ease-in-out;
  z-index: 1;
}

.click-to-call:hover .click-to-call-icon-bg {
  background-color: var(--click-to-call-bg-hover-color) !important;
}

.click-to-call-tooltip {
  display: none;
  background-color: #000;
  color: #fff;
  font-size: 14px;
  padding: 4px 8px;
  border-radius: 4px;
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  z-index: 9999;
}

.click-to-call:hover .click-to-call-tooltip {
  display: block;
}

.click-to-call:hover::before {
  content: '';
  display: block;
  position: absolute;
  top: 0;
  left: 0;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background-color: var(--click-to-call-bg-hover-color);
  z-index: 1;
  box-shadow: 0px 0px 20px gray;
}