Voici juste les parties de CSS que j’ai modifié du CSS du blog:

Twenty Ten: style.css

/* =Structure
-------------------------------------------------------------- */

#wrapper {
	/*background: #fff;*/
	border-radius: 10px;
	background-image: -webkit-gradient(
    linear,
    left bottom,
    right bottom,
    color-stop(0, #FDE082),
    color-stop(0.5, #FAFEBD),
    color-stop(1, #FDE082)
);
background-image: -moz-linear-gradient(
    left center,
    #FDE082 0%,
    #FAFEBD 50%,
    #FDE082 100%
);

/* =Global Elements
-------------------------------------------------------------- */

/* Main global 'theme' and typographic styles */
body {
	
   background-image: -webkit-gradient(
    linear,
    right top,
    left top,
    color-stop(0, #FFCE5C),
    color-stop(0.5, #FAFFBF),
    color-stop(1, #FFCE5C)
);
background-image: -moz-linear-gradient(
    right center,
    #FFCE5C 0%,
    #FAFFBF 50%,
    #FFCE5C 100%
);

}
body,
input,
textarea {
	border-radius: 10px;
	color: #666;
	font-size: 12px;
	line-height: 18px;
}


/* =Header
-------------------------------------------------------------- */

/* This is the custom header image */
#branding img {
	border-radius: 10px 10px 0 0; 
	border-top: 1px solid #000;
	border-bottom: 1px solid #000;
	display: block;
	float: left;
}


/* =Menu
-------------------------------------------------------------- */

#access {
	border-radius: 0 0 10px 10px;
	background: #000;
	display: block;
	float: left;
	margin: 0 auto;
	width: 940px;
}


#access ul ul a {
	/*background: #333; couleur menu déroulant*/
	border-radius: 5px;
	background: #000;
	line-height: 1em;
	padding: 10px;
	width: 100px;
	height: auto;
	font-weight: bold;
}
#access li:hover > a,
#access ul ul :hover > a {
	/*background: #333; couleur over menu*/
	border-radius: 5px;
background-image: -webkit-gradient(
    linear,
    right bottom,
    left top,
    color-stop(0.37, #D42300),
    color-stop(0.14, #D42E00),
    color-stop(0.7, #FF7B00)
);
background-image: -moz-linear-gradient(
    right bottom,
    #D42300 37%,
    #D42E00 14%,
    #FF7B00 70%
);



	font-weight:bold;

	color: #fff;
}