Salve a tutti,
ho un problema ho aperto da poco un blog su piattaforma blogger, sono riuscito a cambiare l'immagine dell'header ma, non riesco a centrare e a giustificare i post all'header. risultano spostati verso destra. C'è qualcuno che può aiutarmi a risolvere questo incoveniente.

questo è il codice del blog:

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html expr:dir='data:blog.languageDirection' xmlns='http://www.w3.org/1999/xhtml' xmlns:b='http://www.google.com/2005/gml/b' xmlns:data='http://www.google.com/2005/gml/data' xmlns:expr='http://www.google.com/2005/gml/expr'>
<head>
<b:include data='blog' name='all-head-content'/>
<title><data:blog.pageTitle/></title>
<b:skin><![CDATA[/*
* Blogger Template Style
*
* Sand Dollar
* by Jason Sutter
* Updated by Blogger Team
*/

/* Variable definitions
====================
<Variable name="textcolor" description="Text Color"
type="color" default="#000" value="#000000">

<Variable name="bgcolor" description="Page Background Color"
type="color" default="#f6f6f6" value="#ffffcc">

<Variable name="pagetitlecolor" description="Blog Title Color"
type="color" default="#F5DEB3" value="#ffffcc">

<Variable name="pagetitlebgcolor" description="Blog Title Background Color"
type="color" default="#DE7008" value="#ffffcc">

<Variable name="descriptionColor" description="Blog Description Color"
type="color" default="#9E5205" / value="#f6f6f6">

<Variable name="descbgcolor" description="Description Background Color"
type="color" default="#F5E39e" value="#ffffcc">

<Variable name="titlecolor" description="Post Title Color"
type="color" default="#9E5205" value="#cc0000">

<Variable name="datecolor" description="Date Header Color"
type="color" default="#777777" value="#000000">

<Variable name="footercolor" description="Post Footer Color"
type="color" default="#444444" value="#000000">

<Variable name="linkcolor" description="Link Color"
type="color" default="#DE7008" value="#0d66b8">

<Variable name="footerlinkcolor" description="Post Footer Link Color"
type="color" default="#968a0a" value="#cc0000">

<Variable name="visitedlinkcolor" description="Visited Link Color"
type="color" default="#DE7008" value="#9D1961">

<Variable name="sidebarcolor" description="Sidebar Title Color"
type="color" default="#B8A80D" value="#062d52">

<Variable name="sidebarlinkcolor" description="Sidebar Link Color"
type="color" default="#999999" value="#999999">

<Variable name="bordercolor" description="Border Color"
type="color" default="#e0ad12" value="#ffffcc">

<Variable name="bodyfont" description="Text Font"
type="font"
default="normal normal 100% 'Trebuchet MS',Trebuchet,Verdana,Sans-Serif" value="normal normal 100% 'Trebuchet MS',Trebuchet,Verdana,Sans-Serif">

<Variable name="headerfont" description="Sidebar Title Font"
type="font"
default="normal bold 150% Verdana,Sans-serif" value="normal bold 150% Verdana,Sans-serif">

<Variable name="dateHeaderFont" description="Date Header Font"
type="font"
default="normal bold 105% 'Trebuchet MS',Trebuchet,Verdana,Sans-serif" value="normal bold 105% 'Trebuchet MS',Trebuchet,Verdana,Sans-serif">

<Variable name="pagetitlefont" description="Blog Title Font"
type="font" default="normal bold 300% Verdana,Sans-Serif" value="normal bold 300% Verdana,Sans-Serif">

<Variable name="titlefont" description="Post Title Font"
type="font" default="normal bold 160% Verdana,Sans-Serif" value="normal bold 160% Verdana,Sans-Serif">
<Variable name="startSide" description="Start side in blog language"
type="automatic" default="left" value="left">
<Variable name="endSide" description="End side in blog language"
type="automatic" default="right" value="right">
*/

body {
margin:0px;
padding:0px;
background:$bgcolor;
color:$textcolor;
font-size: small;
}

#outer-wrapper {
font:$bodyfont;
}

a {
color:$linkcolor;
}

a:hover {
color:$titlecolor;
}

a img {
border-width: 0;
}

#content-wrapper {
padding-top: 0;
padding-$endSide: 1em;
padding-bottom: 0;
padding-$startSide: 1em;
}

@media all {
div#main {
float:$endSide;
width:66%;
padding-top:30px;
padding-$endSide:0;
padding-bottom:10px;
padding-$startSide:1em;
border-$startSide:dotted 1px $bordercolor;
word-wrap: break-word; /* fix for long text breaking sidebar float in IE */
overflow: hidden; /* fix for long non-text content breaking IE sidebar float */
}
div#sidebar {
margin-top:20px;
margin-$endSide:0px;
margin-bottom:0px;
margin-$startSide:0;
padding:0px;
text-align:$startSide;
float: $startSide;
width: 31%;
word-wrap: break-word; /* fix for long text breaking sidebar float in IE */
overflow: hidden; /* fix for long non-text content breaking IE sidebar float */
}
}

@media handheld {
div#main {
float:none;
width:90%;
}

div#sidebar {
padding-top:30px;
padding-$endSide:7%;
padding-bottom:10px;
padding-$startSide:3%;
}
}

#header {
padding-top:0px;
padding-$endSide:0px;
padding-bottom:0px;
padding-$startSide:0px;
margin-top:0px;
margin-$endSide:0px;
margin-bottom:0px;
margin-$startSide:0px;
border-bottom:dotted 1px $bordercolor;
background:$descbgcolor;
}

#header-inner a {
width:770px;
margin:0 auto;

}

h1 a:link {

text-decoration:none;
color:$pagetitlecolor
}

h1 a:visited {
text-decoration:none;
color:$pagetitlecolor
}

h1,h2,h3 {

margin: 0;
}

h1 {
padding-top:25px;
padding-$endSide:0px;
padding-bottom:10px;
padding-$startSide:5%;
color:$pagetitlecolor;
background:$pagetitlebgcolor;
font:$pagetitlefont;
letter-spacing:-2px;
}

h3.post-title {
color:$titlecolor;
font:$titlefont;
letter-spacing:-1px;
}

h3.post-title a,
h3.post-title a:visited {
color: $titlecolor;
}

h2.date-header {
margin-top:10px;
margin-$endSide:0px;
margin-bottom:0px;
margin-$startSide:0px;
color:$datecolor;
font: $dateHeaderFont;
}

h4 {
color:#aa0033;
}

#sidebar h2 {
color:$sidebarcolor;
margin:0px;
padding:0px;
font:$headerfont;
}

#sidebar .widget {
margin-top:0px;
margin-$endSide:0px;
margin-bottom:33px;
margin-$startSide:0px;
padding-top:0px;
padding-$endSide:0px;
padding-bottom:0px;
padding-$startSide:0px;
font-size:95%;
}

#sidebar ul {
list-style-type:none;
padding-$startSide: 0;
margin-top: 0;
}

#sidebar li {
margin-top:0px;
margin-$endSide:0px;
margin-bottom:0px;
margin-$startSide:0px;
padding-top:0px;
padding-$endSide:0px;
padding-bottom:0px;
padding-$startSide:0px;
list-style-type:none;
font-size:95%;
}

.description {
padding:0px;
margin-top:7px;
margin-$endSide:12%;
margin-bottom:7px;
margin-$startSide:5%;
color:$descriptionColor;
background:transparent;
font:bold 100% Verdana,Sans-Serif;
}

.post {
margin-top:0px;
margin-$endSide:0px;
margin-bottom:30px;
margin-$startSide:0px;
}

.post strong {
color:$textcolor;
font-weight:bold;
}

pre,code {
color:$sidebarlinkcolor;
}

strike {
color:$sidebarlinkcolor;
}

.post-footer {
padding:0px;
margin:0px;
color:$footercolor;
font-size:80%;
}
.post-footer a {
border:none;
color:$footerlinkcolor;
text-decoration:none;
}

.post-footer a:hover {
text-decoration:underline;
}

#comments {
padding:0px;
font-size:110%;
font-weight:bold;
}

.comment-author {
margin-top: 10px;
}

.comment-body {
font-size:100%;
font-weight:normal;
color:black;
}

.comment-footer {
padding-bottom:20px;
color:$footercolor;
font-size:80%;
font-weight:normal;
display:inline;
margin-$endSide:10px
}

.deleted-comment {
font-style:italic;
color:gray;
}

.comment-link {
margin-$startSide:.6em;
}

.profile-textblock {
clear: both;
margin-$startSide: 0;
}

.profile-img {
float: $startSide;
margin-top: 0;
margin-$endSide: 5px;
margin-bottom: 5px;
margin-$startSide: 0;
border: 2px solid $pagetitlebgcolor;
}

#sidebar a:link {
color:$sidebarlinkcolor;
text-decoration:none;
}

#sidebar a:active {
color:#ff0000;
text-decoration:none;
}

#sidebar a:visited {
color:sidebarlinkcolor;
text-decoration:none;
}

#sidebar a:hover {
color:$sidebarcolor;
text-decoration:none;
}

.feed-links {
clear: both;
line-height: 2.5em;
}

#blog-pager-newer-link {
float: $startSide;
}

#blog-pager-older-link {
float: $endSide;
}

#blog-pager {
text-align: center;
}

.clear {
clear: both;
}

.widget-content {
margin-top: 0.5em;
}

/** Tweaks for layout editor preview */

body#layout #outer-wrapper {
margin-top: 0;
}

body#layout #main,
body#layout #sidebar {
margin-top: 10px;
padding-top: 0;
}
]]></b:skin>
</head>

<body>
<div id='outer-wrapper'><div id='wrap2'>


<span id='skiplinks' style='display:none;'>
skip to main |
skip to sidebar
</span>

<div id='header-wrapper'>
<b:section class='header' id='header' maxwidgets='1' showaddelement='no'>
<b:widget id='Header1' locked='true' title='jokermedia (Intestazione)' type='Header'/>
</b:section>
</div>

<div id='content-wrapper'>

<div id='crosscol-wrapper' style='text-align:center'>
<b:section class='crosscol' id='crosscol' showaddelement='no'/>
</div>

<div id='main-wrapper'>
<b:section class='main' id='main' showaddelement='no'>
<b:widget id='Blog1' locked='true' title='Post sul blog' type='Blog'/>
</b:section>
</div>

<div id='sidebar-wrapper'>
<b:section class='sidebar' id='sidebar' preferred='yes'/>
</div>


<div class='clear'>&#160;</div>

</div>
</div></div>
</body>
</html>