.circle-clock {
  position: relative;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  margin: 0 auto;
  background: #f7f7f7;
  box-shadow: inset 0 0 10px rgba(0,0,0,0.1);
}

.clock-hour {
  position: absolute;
  width: 40px;
  height: 40px;
  text-align: center;
  line-height: 40px;
  border-radius: 50%;
  background: #ddd;
  color: #333;
  cursor: pointer;
  font-weight: bold;
  transition: 0.2s;
}

.clock-hour.selected {
  background: #007bff;
  color: white;
}

.clock-hour.range-am {
  background: #a8e6cf !important;
  color: #000;
}

.clock-hour.range-pm {
  background: #81c784 !important;
  color: #000;
}

.clock-hour.disabled {
  background: #f44336 !important;
  color: white !important;
  cursor: not-allowed;
  pointer-events: none;
}

.clock-hour.conflict {
  background: #ffeb3b;
  color: #000;
  cursor: not-allowed;
  pointer-events: none;
}