body
{
    background-color: #333;
    width: 100%;
    height: 100vh;
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    align-items: center;
}
h1
{
    color: #fff;
    font-family: Arial, sans-serif;
    font-size: 20px;
    text-align: center;
    margin-top: 20px;
}