front/style.css
body {
    margin: 40px auto;
    max-width: 700px;
    line-height: 1.6;
    font-size: 18px;
    color: #444;
    background-color: white;
    padding: 0 10px;
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
    text-rendering: optimizeLegibility;
    /* Enables kerning and ligatures etc. */
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}


#starter {
    display: inline-grid;
    text-align: center;
    margin: 0 0 50px 0;
}

input {
    font-size: 36px;
    padding: 14px 20px;
    margin: 0 0 20px 0;
}

input {
    display: inline;
    border: none;
    outline: none;
    padding: 9px 20px;
    cursor: pointer;
    margin: 0 0 10px 0;
    font-size: 16px;
    font-weight: bold;
    border-radius: 3px;
    background-color: #448AFF;
    color: white;
    text-transform: uppercase;
}

input:hover {
    background-color: #2979FF;
}

input:active {
    background-color: #2979FF;
}

.dark-mode {
    background-color: black;
    color: white;
    accent-color: #58a6ff;

    a:link {
        color: #58a6ff;
    }

    a:visited {
        color: #3f84e4;
    }
}

h1,
h2,
h3 {
    line-height: 1.2;
}

code,
kbd,
samp,
pre {
    font-family:
        ui-monospace,
        SFMono-Regular,
        Consolas,
        'Liberation Mono',
        Menlo,
        monospace;
    /* 1 */
    font-size: 1em;
    /* 2 */
}

ul {
    list-style-type: '';
    margin: 0;
    padding: 0;
}

li {
    margin: 0;
    padding: 0;
    font-size: .9em;
}

img,
embed,
object,
audio,
video {
    max-width: 100%;
}

summary {
    font-size: .8em;
    padding-bottom: 1em;
}