* {
    margin: 0;
    padding: 0;
}

body {
    margin: 0;
    background-color: #F0F2F5;
    font-family: 'JetBrains Mono', monospace;
    transition: 0.3s ease-in-out;
}

body.dark {
    background-color: #121212;
}

body.old {
    background-color: #3B4664;
}