header{
			height: 150px;
			
		}
		#menu{
			width: 20%;
			
			
			float: left;
		}
		#content{
			width: 80%;
			
			
			float: left;
		}
		footer{
			height: 100px;
			
			clear: left;
		}
		p{
			font-family: lobster;
			
		}
		body {
  background: #d6eaf8;
  background-image: url(https://html5book.ru/wp-content/uploads/2015/06/background28.jpg);
}
.gradient-button {
  text-decoration: none;
  display: inline-block;
  color: white;
  width: 150px;
  padding: 20px 30px;
  margin: 10px 20px;
  border-radius: 10px;
  font-family: 'Montserrat', sans-serif;
  text-transform: uppercase;
  letter-spacing: 2px;
  background-image: linear-gradient(to right, #9EEFE1 0%, #4830F0 51%, #9EEFE1 100%);
  background-size: 200% auto;
  box-shadow: 0 0 20px rgba(0, 0, 0, .1);
  transition: .5s;
}
.gradient-button:hover {
  background-position: right center;
}