body{

font-family:Arial;

}

.navbar{

background:transparent;
transition:0.4s;

}

.navbar.scrolled{

background:black;

}

.navbar-brand{

color:white;
font-weight:bold;

}

.nav-link{

color:white;

}

.hero{

height:100vh;

background:url("../images/hero.jpg") center/cover;

position:relative;

}

.overlay{

position:absolute;
width:100%;
height:100%;
background:rgba(0,0,0,0.6);

}

.content{

position:relative;
top:40%;

}

.counter{

background:url("../images/gym.jpg") center/cover;

padding:80px;

}