How to create Dropdown Menu-Navigation

How to create Dropdown Menu-Navigation Bar using HTML and CSS ????

source code content two files (HTML file, CSS file)

1- HTML file (menu.html):-

<!DOCTYPE html>

<html lang="en">

<head>

    <meta charset="UTF-8">

    <meta http-equiv="X-UA-Compatible" content="IE=edge">

    <meta name="viewport" content="width=, initial-scale=1.0">

    <link rel="stylesheet" href="menu.css">

    <title>Drop Down menu</title>

</head>

<body>

    <div class="container">

        <ul>

            <li>HOME</li>

            <li>ABOUT</li>

            <li>SERVICE

                <ul>

                    <li>Service A</li>

                    <li>Service B

                        <ul>

                            <li>5 Star</li>

                            <li>4 Star</li>

                            <li>3 Star</li>

                        </ul>

                    </li>

                    <li>Service C</li>

                </ul>

            </li>

            <li>LOGIN</li>

        </ul>

    </div>

</body>

</html>

2- CSS file (menu.css)

*{

    margin: 0;

    padding: 0;

}

.container ul{

    list-style: none;

}

.container ul li{

    background-color: rgba(24, 23, 24);

    width: 150px;

    border: 1px solid white;

    line-height: 50px;

    text-align: center;

    float: left;

    font-size: 16px;

    color: white;

    position: relative;

}

.container ul li:hover{

    background-color: rgb(8, 240, 8, 0.651);

}

.container ul ul ul{

    margin-left: 150px;

    top: 0px;

    position: absolute;

}

.container ul ul{

    display: none;

}

.container ul li:hover > ul{

    display: block;

}

channel link :- https://www.youtube.com/channel/UC1DFWpD1k1PtxIzYbdBAj6g 

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Signature :- Ayoub Shindi (Dev AAS).