body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

h1, h2, h3 {
    font-weight: normal;
}

.icon {
    font-family: 'Segoe UI Emoji', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.bit, .carry-bit, .nibble {
    font-family: Consolas, 'Courier New', Courier, monospace;
}