@import url('https://fonts.googleapis.com/css2?family=Ubuntu:wght@300&display=swap');
*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    color: black;
    font-family: 'Ubuntu', sans-serif;
}
body{ 
    background-image: url("one.png"); 
    background-repeat: no-repeat;
    background-size: cover;
    
    /* background-color: #1a73e8; */
}
nav{
    
    background-color: none;
    
   
}
nav:after{
    content: '';
    clear: both;
    display: table;
}
nav .logo{
    float: left;
    color: #1a73e8;
    font-size: 3.8vh;
    font-weight: 600;
    line-height: 70px;
    padding-left: 20px;
}
nav ul{
    float: right;
    list-style: none;
    margin-right: 40px;
    position: relative;
}
nav ul li{
    
    display: inline-block;
    
}
nav ul li a{
    color: black;
    text-decoration: none;
    line-height: 70px;
    font-size: 2.8vh;
    padding: 8px 15px;
}
nav ul li a:hover{
    color: green;
    border-radius: 5px;
    box-shadow: 0 0 5px #34a853,
                0 0 5px #289c47;
}
nav ul ul li a:hover{
    color: #34a853;
    box-shadow: none;
}
nav ul ul{
    position: absolute;
    top: 90px;
    border-top: 3px solid #34a853;
    opacity: 0;
    visibility: hidden;
    transition: top .5s;
}
nav ul li:hover > ul{
    top: 70px;
    opacity: 1;
    visibility: visible;
}
nav ul ul li{
    position: relative;
    margin: 0;
    
    background: white;
    
    width: 15vw;
    float: none;
    display: list-item;
    border-bottom: 1px solid #34a853;
}
nav ul ul li a{
    
    
    line-height: 5vh;
}