class Sass::CompileError

def to_css
  content = full_message(highlight: false, order: :top)
  <<~CSS.freeze
    /* #{content.gsub('*/', "*\u2060/").gsub("\r\n", "\n").split("\n").join("\n * ")} */
    body::before {
      position: static;
      display: block;
      padding: 1em;
      margin: 0 0 1em;
      border-width: 0 0 2px;
      border-bottom-style: solid;
      font-family: monospace, monospace;
      white-space: pre;
      content: #{Serializer.serialize_quoted_string(content).gsub(/[^[:ascii:]][\h\t ]?/) do |match|
        ordinal = match.ord
        replacement = "\\#{ordinal.to_s(16)}"
        if match.length > 1
          replacement << ' ' if ordinal < 0x100000
          replacement << match[1]
        end
        replacement
      end};
    }
  CSS
end