*{
    margin: 0;
    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('back.jpg'); 
    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: 120px;
    cursor:pointer;
}
.navbar ul li{
    list-style: none;
    display: inline-block;
    margin: 0 20px;
    position: relative; 
}
navbar ul li a{
    text-decoration: none;
    color:black;
    text-transform: uppercase;

}
.navbar ul li::after{
    content: '';
    height: 3px;
    width: 0;
    background: #009688;
    position: absolute;
    left: 0;
    bottom: -10px;
    transition: 0.5s;
}
.navbar ul li:hover::after{
    width: 100%;
}
.content{
    width: 100%;
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    text-align: center;
    color: black;
}
.body {
    margin-right: (auto/2)px;
    margin-left: (auto/2)px;
}
div.inside{
    width: 800px
}