send email with CSS not working

I am trying to send email using the below function. On the email it comes without CSS.
Can anybody please help me
Function sendEmail
{
Param([string] $Body)
$smtpServer = "mailhost.lsg"
$smtpFrom = "ServerStats@noreply.lsg.com"
$smtpTo = "asif@lsg.com"
#
$messageSubject = "Monitoring Domain Replication & Health issues"
$message = New-Object System.Net.Mail.MailMessage $smtpfrom, $smtpto
$message.Subject = $messageSubject
$message.IsBodyHTML = $true
$message.Body = (Get-Content c:\temp\html.html | Out-String)
$smtp = New-Object Net.Mail.SmtpClient($smtpServer)
$smtp.Send($message)
} # End function SendEmail
$workfile = repadmin.exe /showrepl * /csv  
$results = ConvertFrom-Csv -InputObject $workfile 
$results = $results | select "Source DSA", "Naming Context", "Destination DSA" ,"Number of Failures", "Last Failure Time", "Last Success Time","Last Failure Status" | ConvertTo-Html -CssUri c:\temp\style.css  
$results | out-file "c:\temp\asif.html"
$style='<style type="text/css">
	#Header{font-family:"Trebuchet MS", Arial, Helvetica, sans-serif;width:100%;border-collapse:collapse;}
	#Header td, #Header th {font-size:14px;border:1px solid #98bf21;padding:3px 7px 2px 7px;}
	#Header th {font-size:14px;text-align:left;padding-top:5px;padding-bottom:4px;background-color:#A7C942;color:#fff;}
	#Header tr.alt td {color:#000;background-color:#EAF2D3;}</Style>'
$body= $style + $results
$body | Out-File c:\temp\html.html
sendEmail $body