body {
  background: url(https://html5book.ru/wp-content/uploads/2015/07/background39.png);
}

.floating-button {
  text-decoration: none;
  display: inline-block;
  width: 140px;
  height: 45px;
  line-height: 45px;
  border-radius: 45px;
  margin: 10px 20px;
  font-family: "Montserrat", sans-serif;
  font-size: 16px;
  text-transform: uppercase;
  text-align: center;
  letter-spacing: 3px;
  font-weight: 600;
  color: #524f4e;
  background: white;
  box-shadow: 0 8px 15px rgba(0, 0, 0, 0.1);
  transition: 0.3s;
}

.floating-button:hover {
  background: #2ee59d;
  box-shadow: 0 15px 20px rgba(46, 229, 157, 0.4);
  color: white;
  transform: translateY(-7px);
}