#header {
    background:#444444;
    padding:20px 0;
    color: #fff;
    text-align: center;
    font-weight: bold;
    font-size: 36px;
}
h1{
    font-size: 36px;
}
h2{
    font-size: 24px;
}
p{
    font-size: 18px;
}

button{
    width: 250px;
    display: block;
    padding: 8px 12px;
    margin-bottom: 15px;
}