Problem with customising all galleries

[presence]

Hi,
My header/banner is normally 750px wide on the homepage, category page but I want to make it 960px wide on all the gallery pages.

Is .gallery the right code for applying css to all the gallery pages. Here's a sample gallery page (http://presence.smugmug.com/gallery/2767650#148941434) and here's the code I think should work (but it doesn't:scratch)

/* =============== */
/* ==Header info== */
/* =============== */
#my_banner {
margin-left: auto;
margin-right: auto;
padding: 30px 0 0 0px;
width: 750px;
background-color: #F5F5E7;
border-bottom: 10px solid #990031;
}

/* ============================= */
/* ==Header info for galleries== */
/* ============================= */
.gallery #my_banner {
margin-left: auto;
margin-right: auto;
padding: 30px 0 0 0px;
width: 960px;
background-color: #F5F5E7;
border-bottom: 10px solid #990031;
}

Thanks in advance.

[Allen]

Hi,
My header/banner is normally 750px wide on the homepage, category page but I want to make it 960px wide on all the gallery pages.

Is .gallery the right code for applying css to all the gallery pages. Here's a sample gallery page (http://presence.smugmug.com/gallery/2767650#148941434) and here's the code I think should work (but it doesn't:scratch)
...
Thanks in advance.
You have two different gallery pages, smugmug and smugmug_small. Also if
you use any other styles that need the large banner they will have to be
added.

/* =============== */
/* ==Header info== */
/* =============== */
.smugmug_small #my_banner,
#my_banner {
margin-left: auto;
margin-right: auto;
padding: 30px 0 0 0px;
width: 750px;
background-color: #F5F5E7;
border-bottom: 10px solid #990031;
}

/* ============================= */
/* ==Header info for galleries== */
/* ============================= */
.smugmug #my_banner {
margin-left: auto;
margin-right: auto;
padding: 30px 0 0 0px;
width: 960px;
background-color: #F5F5E7;
border-bottom: 10px solid #990031;
}



.smugmug_small #subheader,
#subheader {
margin-left: auto;
margin-right: auto;
background-color: #ffffff;
width: 750px;
height: 70px;
}

.smugmug #subheader {
margin-left: auto;
margin-right: auto;
background-color: #ffffff;
width: 960px;
height: 70px;
}

.smugmug #stylebar.nav {
width: 960px;}

[presence]

:bow:bow:bow Worked a dream :bow:bow:bow