*{
margin: o;
padding: 0;
font-family: sans-serif;
}
.banner{
width: 100%;
height: 100vh;
background-image: linear-gradient(rgba(0,0,0,0.75),rgba(0,0,0,0.75)),url(bgimg.png);
background-size: cover;
background-position: center;
}
.navbar{
width: 85%;
margin: auto;
padding: 35px 0;
display: flex;
align-items: center;
justify-content: space-between;
}
.logo{
width: 80px;
cursor: pointer;
}
.navbar ul li{
list-style: none;
display: inline-block;
margin: 0 20px;
position: relative;
}
.navbar ul li a{
text-decoration: none;
color: #fff;
text-transform: uppercase;
}
.navbar ul li::after{
content: '';
height: 3px;
width: 0;
background: #009688;
position: absolute;
left: 0;
bottom: -5px;
transition: 0.5s;
}
.navbar ul li:hover::after{
width: 100%;
}
.content{
witdh: 100%;
position: absolute;
top: 50%;
transform: translateY(-50%);
text-align: left;
color: #fff;
}
.content h1{
font-size: 40px;
margin-top: 80px;
}
.content p{
margin: 20px auto;
font-weight: 100;
line-height: 25px;
}
button{
width: 200px;
padding: 15px 0;
text-align: center;
margin: 20px 10px;
border-radius: 25px;
font-weight: bold;
border: 2px solid #009688;
background: transparent;
color: #fff;
cursor: pointer;
position: relative;
}
button{
    text-decoration: none; 
    color: white; 
}
span{
background: #009688;
height: 100%;
width: 0;
border-radius: 25px;
position: absolute;
left: 0;
bottom: 0;
z-index: -1;
transition: 0.5s;
}
button:hover span{
width: 100%;
}
button:hover{
border: none;
}