<!DOCTYPE html>
<html>
<head>
    <style>
        .button {
            border: none;
            color: white;
            padding: 16px 32px;
            text-align: center;
            text-decoration: none;
            display: inline-block;
            font-size: 16px;
            margin: 4px 2px;
            transition-duration: 0.4s;
            cursor: pointer;
        }

        .button1 {
            background-color: white;
            color: black;
            border: 2px solid #4CAF50;
        }

        .button1:hover {
            background-color: #4CAF50;
            color: white;
        }

        .button2 {
            background-color: white;
            color: black;
            border: 2px solid #008CBA;
        }

        .button2:hover {
            background-color: #008CBA;
            color: white;
        }

    </style>
</head>
<body>

<h1>The button element - Styled with CSS</h1>

<p>Use the :hover selector to change the style of the button when you move the mouse over it.</p>
<p><strong>Tip:</strong> Use the transition-duration property to determine the speed of the "hover" effect:</p>

<button class="button button1">Green</button>
<button class="button button2">Blue</button>

</body>
</html>