<!DOCTYPE html>

<html>
    <head>
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
        <title>style button</title>
        <link rel="stylesheet" href="style.css">

    </head>
    <body>
        <div class="container">
            <button type="button">Accept</button>
            <button type="button" class="reject">Reject</button>
        </div>
    </body>
</html>

*
{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family:'poppins',sans-serif;
}
.container{
    height: 100vh;
    width: 100%;
    background: #ebeef1;
    display: flex;
    align-items: center;
    justify-content: center;
}
button{
    font-size: 32px;
    font-weight: 500;
    padding: 20px;
    margin: 30px;
    width: 350px;
    background: #ebeef1;
    cursor: none;
    border-radius: 50px;
    color: #00a037;
    box-shadow: 10px 10px 10px -1px rgba(10,99,169,0.16),
    -10px -10px 10px -1px rgba(255,255,255,0.70);
               
}
button.reject{
    color: #ed0000;
    box-shadow: inset 10px 10px 10px -1px rgba(10,99,169,0.16),
    inset -10px -10px 10px -1px rgba(255,255,255,0.70);
}