body {
	background-image: url("https://artlarch.ru/wp-content/uploads/2019/02/1363720214_-3000x2000.jpg");	
	background-attachment: fixed;
	background-position: center;
	background-repeat: no-repeat;
	background-size: cover;
}

.top-button {
    bottom: 45px;
}

.logo {
    height: 40px;
}