body {
    background-color: #111;
    color: #fff;
    text-align: center;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.container {
    margin-top: auto;
    margin-bottom: 60px;
}

#responseBox {
    display: none;
    margin-top: 20px;
    padding: 20px;
    background-color: #222;
    color: #fff;
}

#responseBox pre {
    margin: 0;
    background-color: #444;
    padding: 10px;
    overflow-x: auto;
}

.form-control {
    background-color: #333;
    color: #fff;
}

.disabled {
    pointer-events: none;
    opacity: 0.6;
}

footer {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 10px;
    background-color: #333;
    color: #fff;
}