body {
    background-color:#121212;
    color: #fff;
    font-family: Arial, Helvetica, sans-serif;
    max-width: 50%; 
    margin: auto; 
    margin-top: 10vh;
}

@media screen and (max-width: 600px) {
    body {
      max-width: 100% !important;
    }

    .button {
        width: 100% !important;
    }
    
    .footer {
        text-align: center;
    }
}

.header {
    margin-top: 10px;
    margin-bottom: 20px;
    margin-left: 10px;
    font-size: 20px;
}

.button {
    margin-top: 20px;
    width: 450px;
}

input {
    background-color: #161616;
    border: none;
    padding: 10px;
    outline: none;
    border-radius: 3px;
    color: #fff;
}

button {
    background-color: #161616;
    border: none;
    padding: 10px;
    outline: none;
    border-radius: 3px;
    color: #fff;
}

button:hover {
    cursor: pointer;
}

a {
    color: #fff;
}

a:hover {
    color: violet;
}

fieldset {
    border-color: #161616;
    border-style: solid;
}