body {
  background: url('../img/background.png') 0px 65px no-repeat #600;
  font-family: 'Roboto', sans-serif;
  font-size: 16px;
}
.btn-book {
  margin-right: 20px;
  margin-top: 20px;
  background-color: transparent;
  background-image: linear-gradient(rgb(159,181,156) 5px, rgb(138,164,134) 8px, rgb(99,133,93) 8px);
  background-image: -o-linear-gradient(rgb(159,181,156) 5px, rgb(138,164,134) 8px, rgb(99,133,93) 8px);
  background-image: -ms-linear-gradient(rgb(159,181,156) 5px, rgb(138,164,134) 8px, rgb(99,133,93) 8px);
  background-image: -moz-linear-gradient(rgb(159,181,156) 5px, rgb(138,164,134) 8px, rgb(99,133,93) 8px);
  background-image: -webkit-linear-gradient(rgb(159,181,156) 5px, rgb(138,164,134) 8px, rgb(99,133,93) 8px);
  border: 2px solid rgb(159,181,156);
  font-family: Verdana, Arial, Helvetica, sans-serif;;
}
.btn-book:hover {
  background-image: linear-gradient(rgb(143,66,77) 5px, rgb(132,47,58) 8px, rgb(112,16,30) 8px);
  background-image: -o-linear-gradient(rgb(143,66,77) 5px, rgb(132,47,58) 8px, rgb(112,16,30) 8px);
  background-image: -ms-linear-gradient(rgb(143,66,77) 5px, rgb(132,47,58) 8px, rgb(112,16,30) 8px);
  background-image: -moz-linear-gradient(rgb(143,66,77) 5px, rgb(132,47,58) 8px, rgb(112,16,30) 8px);
  background-image: -webkit-linear-gradient(rgb(143,66,77) 5px, rgb(132,47,58) 8px, rgb(112,16,30) 8px);
  border-color: rgb(143,66,77);
}