invent.css

body
{
    margin:0px;
}
/* navigation bar */

.mynav {
    display: flex;
    align-items: center;
    position: sticky;
    width: 100%;
    top: 0px;
    height:45px;
}

.logo img {
    margin-top: 4px;
    height: 40px;
}

.mynav .resp {
    list-style: none;
}

.mynav a {
    float: left;
    margin: 1px 20px;
    padding: 10px;
    text-decoration: none;
    color:#0a0a0a;
}
.mynav ul{
    display: inline;
}

.mynav a:hover {
    background-color: rgb(190, 233, 155);
}

#burger {
    display: none;
    position: absolute;
    right: 3%;
    top: 8px;
}

@media screen and (max-width:782px) {
    .logo img {
        margin-top: 3%;
        height: 32px;
    }
    .mynav {
        flex-direction: column;
        align-items: center;
    }
    .mynav a {
        margin: 2px 0px;
        padding: 4px 320px;
    }
    .mynav #ul {
        display: none;
        background-color: rgb(250, 239, 250);
        margin: 0px 0px;
        padding-left: 0px;
        opacity: 0.9;
    }
    #burger {
        display: block;
        float: left;
        cursor: pointer;
    }
}
/* navigation end */
.container{

    display: flex;
    position: relative;
    background-image: url(invent.jpg);
    background-size: cover;
    margin-top: 45px;
    height: 700px;
    
}