.red{
  color: red;
}

.green{
  color: green;
}

.button {
  background-color: #4CAF50;
  border: none;
  color: white;
  padding: 15px 32px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 16px;
  margin: 4px 2px;
  cursor: pointer;
}

.btn-circle {
  width: 45px;
  height: 45px;
  line-height: 45px;
  text-align: center;
  padding: 0;
  border-radius: 50%;
}

.btn-circle i {
  position: relative;
  top: -1px;
}

.btn-circle-sm {
  width: 35px;
  height: 35px;
  line-height: 35px;
  font-size: 0.9rem;
}

.btn-circle-lg {
  width: 55px;
  height: 55px;
  line-height: 55px;
  font-size: 1.1rem;
}

.btn-circle-xl {
  width: 70px;
  height: 70px;
  line-height: 70px;
  font-size: 1.3rem;
}

.margin{
  margin-bottom: 15px;
}