html - fixed width of div in oracle function -


i have oracle function format mail data before sending. function called pl/sql process in apex. have small problem css formating of mail. want have div fixed width 750px. , table , other elements fit specifed width. problem when define fixed width of div not work. have tried on jsfiddle , works not work in oracle function. when define other div parameter font size, color, border etc. works. not able change width of div. function: 

 create or replace function  "send_mail" return varchar2          pragma autonomous_transaction;      kontr_tema varchar2(500);      komentar varchar2(2000);      obl varchar2 (100);      riz varchar2 (1);      riz_warning varchar2(100);      last_report_id number;      vystup varchar2(2601);      begin      select riziko riz audit_reports     report_id =     (select max(report_id) audit_reports);      select oblast obl audit_reports     report_id =     (select max(report_id) audit_reports);      x in(select opis_kontroly  audit_reports     report_id =     (select max(report_id) audit_reports))     loop     komentar := ''||x.opis_kontroly||'<br />';     end loop;      x1 in(select kontrolna_tema  audit_reports     report_id =     (select max(report_id) audit_reports))     loop     kontr_tema := ''||x1.kontrolna_tema||'<br />';     end loop;        vystup := '     <html>     <head>       <style type="text/css">         div{           position:relative;           width:750px;           border: 1px solid black;           border-collapse: separate;         }         </style>          <style type="text/css">         "table,th,td" {             border: 1px solid black;             border-collapse: separate;             width:100% !important;         }         </style>      </head>         <body>        <div>        <table border = "1">             <tr>                 <th>oblasť</th>                 <th>riziko</th>                 <th>kontrolná téma</th>                 <th>komentár</th>              </tr>               <tr>                 <td>'||obl||'</td>                 <td>'||riz||'</td>                 <td>'||kontr_tema||'</td>                 <td>'||komentar||'</td>              </tr>            </table>               </div>      </body>      </html> ';      return vystup;     commit;       end;

see this answer. problem not in oracle or in apex, email clients ignore css headers , should avoid them , instead use inline styling e.g.

<div style="width: 750px">...</div>

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