How to resize big image at Homepage?

How can I rezise the height of big image at Frontpage?
I cannot do it with CSS. :dry:

In layout.css:

div.header_bottom div.container {
min-height: 533px;
background: url(../images/custom/header_bg1_2.jpg) no-repeat;
}

change min-height: 533px;

Ivan, I just did it before you told me.
Nothing happen. For that reason I said "With CSS doesnt work".

If I changed this code for max-height the images was resized.
But the below positions doesnt go up and remains a empty space between main image and modules.

I did it. It works! After change to max-height also I changed this line to reduce empty space:

.mp_top1 {
padding-top: 210px;
}

Now, a finally question:
Where I replace favicon? I cannot find it.

See
docs.joomla.org/Changing_the_site_favicon