html, body {
    height: 100%;
    margin: 0;
}

body {
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #f5f5f5;
}

#testButton {
    padding: 12px 24px;
    font-size: 16px;
    color: #fff;
    background-color: #006400;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

#testButton:hover {
    background-color: #008000;
}
