headerbar {
    .title {
        // Cannot be a number or fonts break in Flatpak
        font-weight: bold;
    }

    .subtitle {
        opacity: 0.75;
        font-size: 80%;
    }

    box.start,
    box.end {
        border-spacing: rem(6px);
    }

    box.start:dir(ltr),
    box.end:dir(rtl) {
        margin-right: rem(12px);
    }

    box.end:dir(ltr),
    box.start:dir(rtl) {
        margin-left: rem(12px);
    }

    .large-icons {
        -gtk-icon-size: 24px;
    }

    .csd & {
        padding: rem(6px);
    }
}
