@mixin define-font-family($name, $weight, $style, $filename) {
    font-family: $name;

    src: 
        url("../font/woff2/#{$filename}") format("woff2"),
        url("../font/ttf/#{$filename}") format("ttf");
    font-weight: $weight;
    @if $style {
        font-style: $style;
    }
}

$sans_font: IBMPlexSans;
$serif_font: IBMPlexSerif;

@font-face {
    @include define-font-family($sans_font, normal, italic, 'IBMPlexSans-Italic.woff2')
}
@font-face {
    @include define-font-family($sans_font, normal, null, 'IBMPlexSans-Regular.woff2')
}
@font-face {
    @include define-font-family($sans_font, 200, null, 'IBMPlexSans-Light.woff2')
}
@font-face {
    @include define-font-family($sans_font, bold, italic, 'IBMPlexSans-BoldItalic.woff2')
}
@font-face {
    @include define-font-family($sans_font, 700, null, 'IBMPlexSans-Medium.woff2')
}
@font-face {
    @include define-font-family($sans_font, lighter, italic, 'IBMPlexSans-LightItalic.woff2')
}
@font-face {
    @include define-font-family($serif_font, normal, italic, 'IBMPlexSerif-Italic.woff2')
}
@font-face {
    @include define-font-family($serif_font, lighter, null, 'IBMPlexSerif-Light.woff2')
}
@font-face {
    @include define-font-family($serif_font, lighter, italic, 'IBMPlexSerif-LightItalic.woff2')
}
