body {
    margin: 20px auto;
    max-width: 650px;
    line-height: 1.6;
    font-size: 18px;
    color: #222;
    padding: 0 10px;
    background: #FFF5F9;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    text-align: center;
}

h1, h2, h3 {
    line-height: 1.2;

}

div {
    padding:5px;
    background-color: #F7F5F7;
    border:2px solid Silver;
    border-radius:4px;
}

.btnsubmit {
    background-color: #4CAF50; /* Green */
    color: white;
    padding: 15px 32px;
    text-align: center;
    display: inline-block;
    font-size: 16px;
    border-radius:4px;
}
.btnsubmit:hover {
    background-color: seagreen; /* Dark Green */
    color: white;
    padding: 15px 32px;
    text-align: center;
    display: inline-block;
    font-size: 16px;
    border-radius: 4px;
}