html,
body {
    margin: 0px;
    padding: 0px;
    height: 100%;
    width: 100%;
}

body {
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #444;
}

.container {
    display: flex;
    background-color: #fff;
    padding: 20px;
    border-radius: 20px;
    box-shadow: 0px 1px 5px rgba(0, 0, 0, 0.1);

    fieldset {
        text-align: center;
        padding: 15px;
        cursor: pointer;
        width: 250px;
        border-radius: 5px;

        legend {
            text-align: center;
            display: inline-block;
            padding: 0px 10px;
            font-size: 18px;
        }

        canvas {
            margin: 15px auto;
            display: block;
        }
    }
}

@media screen and (max-width: 1200px) and (min-width: 678px) {
    .container {
        transform: scale(0.75);
    }
}

@media screen and (max-width: 678px) {
    body {
        display: block;
    }
    .container {
        flex-wrap: wrap;
        max-width: 100%;
        border-radius: 0px;
        fieldset {
            width: 100%;

            & + fieldset {
                margin-top: 15px;
            }
        }
    }
}