shfw-walkthrough/logic/style.css

css
body {
    font-family: Arial, sans-serif;
    background-color: #121212;
    color: white;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

.container {
    max-width: 600px;
    margin: 20px auto;
    padding: 0 15px;
    box-sizing: border-box;
}

.input-section label {
    display: block;
    margin-top: 20px;
}

.input-section input,
button {
    width: 100%;
    padding: 10px;
    margin-bottom: 20px;
    background-color: #333;
    border: 1px solid #444;
    color: white;
    box-sizing: border-box;
}

button {
    cursor: pointer;
    display: block;
}

@media (max-width: 768px) {
    .container {
        margin: 10px;
    }

    .input-section input,
    button {
        margin-left: auto;
        margin-right: auto;
    }
}