WP Twenty Twelve Navigation Display - php

Question

How do I make the sub-navigation links in the default Twenty Twelve Wordpress theme display over the wrapper/container?
header.php:
<nav id="site-navigation" class="main-navigation" role="navigation">
<h3 class="menu-toggle"><?php _e( 'Menu', 'twentytwelve' ); ?></h3>
<a class="assistive-text" href="#content" title="<?php esc_attr_e( 'Skip to content', 'twentytwelve' ); ?>"><?php _e( 'Skip to content', 'twentytwelve' ); ?></a>
<?php wp_nav_menu( array( 'theme_location' => 'primary', 'menu_class' => 'nav-menu' ) ); ?>
</nav>
style.css:
.site-content nav {
clear: both;
overflow: hidden;
}
.main-navigation .assistive-text:hover,
.main-navigation .assistive-text:active,
.main-navigation .assistive-text:focus {
background: #fff;
border: 2px solid #333;
-webkit-border-radius: 3px;
-moz-border-radius: 3px;
-o-border-radius: 3px;
-ms-border-radius: 3px;
border-radius: 3px;
clip: auto !important;
color: #000;
display: block;
font-size: 12px;
padding: 12px;
position: absolute;
top: 5px;
left: 5px;
z-index: 100000; /* Above WP toolbar */
}
.main-navigation {
text-align: center;
clear: both;
}
.main-navigation li {
font-size: 12px;
font-size: 0.8571428571rem;
}
.main-navigation a {color: #5e5e5e;}
.main-navigation a:hover {color: #21759b;}
.main-navigation ul.nav-menu,
.main-navigation div.nav-menu > ul {display: none;}
.main-navigation ul.nav-menu.toggled-on,
.menu-toggle {display: inline-block;}
.menu-toggle {
margin: 16px 0;
margin: 1.1428571429rem 0;
}
.main-navigation ul.nav-menu.toggled-on li {margin-bottom: 16px;}
#media screen and (min-width: 600px) {
.main-navigation ul.nav-menu,
.main-navigation div.nav-menu > ul {
display: inline-block !important;
text-align: center;
width: 100%;
}
.main-navigation ul {text-indent: 0;}
.main-navigation li a,
.main-navigation li {
display: inline-block;
text-decoration: none;
margin: 0 16px;
margin: 0 1.1428571429rem;
}
.main-navigation li a {
border-bottom: 0;
color: #6a6a6a;
padding: 12px 0;
text-transform: uppercase;
white-space: nowrap;
}
.main-navigation li a:hover {color: #89CBBF;}
.main-navigation li {
position: relative;
margin: 0;
}
.main-navigation li:hover {background: #ededed;}
.main-navigation li ul {
display: none;
margin: 0;
padding: 0;
position: absolute;
top: 100%;
z-index: 1;
}
.main-navigation li ul ul {
top: 0;
left: 100%;
}
.main-navigation ul li:hover > ul {
border-left: 0;
display: block;
}
.main-navigation li ul li a {
background: #efefef;
border-bottom: 1px solid #ededed;
display: block;
font-size: 11px;
font-size: 0.7857142857rem;
min-width: 180px;
min-width: 12.857142857rem;
white-space: normal;
margin: 0;
padding: 12px 5px;
-moz-hyphens: auto;
-o-hyphens: auto;
-ms-word-break: break-all;
-webkit-hyphens: auto;
hyphens: auto;
word-break: break-all;
word-wrap: break-word;
}
.main-navigation li ul li a:hover {
background: #e3e3e3;
color: #89CBBF;
}
.main-navigation .current-menu-item > a,
.main-navigation .current-menu-ancestor > a,
.main-navigation .current_page_item > a,
.main-navigation .current_page_ancestor > a {
color: #89CBBF;
font-weight: bold;
}
.menu-toggle {display: none;}

Answer 1

I think you shloud try removing the overflow: hidden from .site