arduino css from sd

hello guys!i m making a simple system that controls 3 relays and 2 sensors via the ethernet shield of my arduino.the problem is that i want to make arduino take the css file which is located in my sd card instead of the internet(as the example code i m modifying suggests).how could i do something like that?if that isnt possible,i also have another idea,of just visiting a starting webpage (index.htm) and then control the sensors.i have found a code that shows the index.htm located to my sd card,but i dont know how to combine it with my code.i m giving you both codes,just to tell me if you have any ideas!!
my code is this one

#include <SPI.h>
#include <Ethernet.h>
 
byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED }; //physical mac address
byte ip[] = { 192, 168, 1, 177 }; // ip in lan
byte gateway[] = { 192, 168, 1, 1 }; // internet access via router
byte subnet[] = { 255, 255, 255, 0 }; //subnet mask
EthernetServer server(80); //server port
 
String readString;
 
//////////////////////
 
void setup(){
 
  pinMode(4, OUTPUT);
  pinMode(6, OUTPUT); //pin selected to control
  //start Ethernet
  Ethernet.begin(mac, ip, gateway, subnet);
  server.begin();
  //the pin for the servo co
  //enable serial data print
  Serial.begin(9600);
  Serial.println("server LED test 1.0"); // so I can keep track of what is loaded
}
 
void loop(){
  // Create a client connection
  EthernetClient client = server.available();
  if (client) {
    while (client.connected()) {
      if (client.available()) {
        char c = client.read();
 
        //read char by char HTTP request
        if (readString.length() < 100) {
 
          //store characters to string
          readString += c;
          //Serial.print(c);
        }
 
        //if HTTP request has ended
        if (c == '\n') {
 
          ///////////////
          Serial.println(readString); //print to serial monitor for debuging
 
          client.println("HTTP/1.1 200 OK"); //send new page
          client.println("Content-Type: text/html");
          client.println();
 
          client.println("<HTML>");
          client.println("<HEAD>");
          client.println("<style>");
          client.println("<background-color=#525252>");
          client.println("<meta name='apple-mobile-web-app-capable' content='yes' />");
          client.println("<meta name='apple-mobile-web-app-status-bar-style' content='black-translucent' />");
          client.println("<link rel='stylesheet' type='text/css' href='http://homeautocss.net84.net/a.css' />");
          client.println("<TITLE><font size=9 color=red>Christmas Lights</font></TITLE>");
          client.println("</style>");
          client.println("</HEAD>");
          client.println("<BODY>");
          client.println("<H1><font size=9 color=red>CHRISTMAS LIGHTS</font></H1>");       
          client.println("
");
          client.println("
");
          client.println("
");
          client.println("
");
          client.println("
");
          client.println("<H1><font size=9 color=red>TREE-DOOR<font></H1>");
          client.println("<a href=\"/?lighton1\"\"><font size=6 color=black>ON</font>&nbsp;&nbsp;&nbsp;&nbsp; </a>");
          client.println("<a href=\"/?lightoff1\"\"><font size=6 color=black>OFF</font></a>
");  
          client.println("
");
          client.println("
");
          client.println("
");
          client.println("<H1><font size=6 color=red>other lights</font></H1>");
          client.println("<a href=\"/?lighton2\"\"><font size=6 color=black>ON</font>&nbsp;&nbsp;&nbsp;&nbsp;</a>");
          client.println("<a href=\"/?lightoff2\"\"><font size=6 color=black>OFF</font></a>
");        
          client.println("<hr />");
          client.println("</BODY>");
          client.println("</HTML>");
 
          delay(1);
          //stopping client
          client.stop();
 
          ///////////////////// control arduino pin
          if(readString.indexOf("?lighton1") >0)//checks for on
          {
            digitalWrite(4, HIGH);    // set pin 4 high
            Serial.println("Led On");
          }
          else{
          if(readString.indexOf("?lightoff1") >0)//checks for off
          {
            digitalWrite(4, LOW);    // set pin 4 low
            Serial.println("Led Off");
          }
          }
          
          if(readString.indexOf("?lighton2") >0)//checks for on
          {
            digitalWrite(6, LOW);    // set pin 4 high
            Serial.println("Led On");
          }
          else{
          if(readString.indexOf("?lightoff2") >0)//checks for off
          {
            digitalWrite(6, HIGH);    // set pin 4 low
            Serial.println("Led Off");
          }
          }
           //clearing string for next read
           readString="";
        }
      }
    }
  }
}

and the code for the index.htm from sd is this one

any help will really be great!!either reading the css from my sd,or just combining the two codes!!