Why border lines not rendering in pdf generated?

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C#

Border lines set in html is not rendering in pdf generated. i am passing the html code as below .


My html code:

<p><u><strong><img alt="" src="[BANKLOGO]" style="float:left; height:41px; width:893px" /></strong></u></p>    <p><strong>ABC PLATINUM CREDIT CARD:</strong></p>    <p><span style="color:rgb(0,153,255)"><strong>Statement for&nbsp;ABC&nbsp;Account Numbe</strong>r</span><strong>&nbsp;<span style="color:rgb(0,153,255)">[ACCOUNTNO]</span></strong></p>    <p><strong><span style="color:rgb(0,153,255)">Statement Period</span>:</strong> <strong><span style="color:rgb(0,153,255)">[FROMDATE] - [TODATE]</span></strong></p>    
       <div style="width:500px;float:left; height: auto; color: rgb(0,153,255)"> 
 <div style="width: 162px;float:left; height: auto; color: rgb(0,153,255);border:solid 3px #808080"> 
             <p style="border-bottom:solid 3px #000000"><strong>At a Glance</strong></p>   
             <p><strong>Statement Date:</strong></p>   
              <p><strong>[STATEMENTDATE]</strong></p>    <p>&nbsp;</p>  
              <p><strong>Total Credits</strong></p>   
             <p><strong>[TOTALCREDIT]</strong></p>   
             <p><strong>Total Debits</strong></p>    
            <p>[TOTALDEBIT]</p> 

        </div>    
        <div style="width: 162px; height: 100px;float:left; color: rgb(0,153,255);border:solid  #000000">  
            <p><strong>Total Credits</strong></p>   
             <p><strong>[TOTALCREDIT]</strong></p>   
             <p><strong>Total Debits</strong></p>    
            <p>[TOTALDEBIT]</p> 

        </div>  
           </div>

What I have tried:

My html code:

<p><u><strong><img alt="" src="[BANKLOGO]" style="float:left; height:41px; width:893px" /></strong></u></p>    <p><strong>ABC PLATINUM CREDIT CARD:</strong></p>    <p><span style="color:rgb(0,153,255)"><strong>Statement for&nbsp;ABC&nbsp;Account Numbe</strong>r</span><strong>&nbsp;<span style="color:rgb(0,153,255)">[ACCOUNTNO]</span></strong></p>    <p><strong><span style="color:rgb(0,153,255)">Statement Period</span>:</strong> <strong><span style="color:rgb(0,153,255)">[FROMDATE] - [TODATE]</span></strong></p>    
       <div style="width:500px;float:left; height: auto; color: rgb(0,153,255)"> 
 <div style="width: 162px;float:left; height: auto; color: rgb(0,153,255);border:solid 3px #808080"> 
             <p style="border-bottom:solid 3px