iframe {
    width: 800px;
    height: 600px;
    border: 1px solid gray;
}

.main {
    max-width: 800px;
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 20px;
    justify-items: center;
    align-items: center;
    margin: 0 auto;
}


.main > input[type="text"] {
    height: 30px;
    width: 100%;
    background: #eeeeee;
    border:1px solid #999999;
}

.buttonsubmit {
    height: 30px;

}