body {
    font-family: Arial;
    background:#f5f5f5;
}
.container {
    width: 230px;
    margin: 50px auto;
    padding: 20px;
    background: white;
    border-radius: 8px;
}
input, button {
    margin: 8px 0;
    padding: 10px;
}
.hidden {
    display:none;
}
.error {
    color: red;
}
.mysuccess {
    color: green;
}