Function sidebar_css

pub fn sidebar_css(
    reverse: bool,
    shrink: bool,
    side: Option<&str>,
    side_width: Option<&str>,
    content_min: Option<&str>,
    gap: Option<&str>,
    gap_x: Option<&str>,
    gap_y: Option<&str>,
    harmonic_ratio: f64,
    set: &mut HashSet<String>,
)