View file style/panel/css/media.css

@media (min-width: 810px) {
    .l-sidebar {
    	width: 266px;
        margin-right: -100%;
        float: left;
        position: static;
    }
    
    .l-sidebar.__column .l-sidebar_cnt {
        -webkit-box-shadow: none;
        box-shadow: none;
        width: 100%;
    }

    .l-sidebar {
        clip: inherit;
        z-index: 3;
        height: auto;
        overflow: visible;
        float: left;
        margin-bottom: 10px;
        margin-top: 4px;
    }

    .__sidebar-active .l-sidebar {
    }

    .two-columns-layout.full-height #boxPage, .two-columns-layout.full-height .a-search .a-search_i {
        background: #e0e0e0;
    }

    .two-columns-layout .l-sidebar~#boxPage {
        float: left;
        margin-right: -100%;
        width: 100%;
        padding-left: 266px;
        -webkit-box-sizing: border-box;
        box-sizing: border-box;
    }

    .two-columns-layout .two-columns-layout-content {
        max-width: 60em;
        margin: 0 auto;
        background: #e0e0e0;
        position: relative;
    }

    .two-columns-layout .two-columns-layout-content {
        background: #f0f0f0;
    }

    .contextual-column-float .two-columns-layout-content, .two-columns-layout .two-columns-layout-content {
        max-width: 900px;
        margin: 0 auto;
    }

    .two-columns-layout.full-height .two-columns-layout-content:before {
        content: '';
        position: absolute;
        top: 0;
        right: .27em;
        bottom: .27em;
        left: 266px;
        margin-left: .27em;
        -webkit-box-sizing: border-box;
        box-sizing: border-box;
    }

    .full-height.contextual-column-float .two-columns-layout-content:before, .two-columns-layout .two-columns-layout-content:before {
        max-width: 626px;
    }

    .two-columns-layout .two-columns-layout_sidebar-bg-fix {
        content: '';
        position: absolute;
        height: 100%;
        left: 0;
        top: 0;
        width: 266px;
        background: #333;
        z-index: 110;
    }

    .__sidebar-hided .two-columns-layout_sidebar-bg-fix, .two-columns-layout .two-columns-layout-bg-fix, .two-columns-layout .two-columns-layout_sidebar-bg-fix, .two-columns-layout .toolbar.__show-main-menu .toolbar_two-columns-actions, .two-columns-layout .toolbar_two-columns-actions .ntf.__main-logo .gbbl {
        display: none;
    }

}

@media (max-width: 809px) {

	body {
	    padding-top: 40px !important;
	}

	.toolbar-w {
	    display: block;
	}

	 .l-sidebar {
	    padding: 2px 2px 2px 0 !important;
	    z-index: 150;
	    width: 80%;
        position: fixed;
        top: 0;
	}
	    
	.__sidebar-can_animate .l-sidebar {
        transition: left .2s;
	}

	.__sidebar-active {
	    overflow: hidden;
	}

	.l-sidebar .fi, .l-sidebar_lst {
	    overflow: hidden;
	}

	.__sidebar-active .l-sidebar {
	    position: fixed;
	    clip: inherit;
	    overflow: visible;
	    z-index: 150;
	}

	.__sidebar-active .l-sidebar_cnt {
	    height: 100%;
	    overflow-y: auto;
	    overflow-x: hidden;
	    -webkit-overflow-scrolling: touch;
	    padding-left: 0px !important;
	    padding-right: 2px;
	}

	.l-sidebar_c_overlay {
	    position: fixed;
	    top: 0;
	    right: 0;
	    width: 0;
	    height: 100%;
	    background: rgb(224,224,224);
	    -webkit-tap-highlight-color: transparent;
	    z-index: 140;
	    -webkit-transition: opacity 1s;
	    transition: opacity .2s;
	    opacity: 0;
	}

	.__sidebar-active .l-sidebar_c_overlay {
	    width: 100%;
	    opacity: .5;
	}

	.toolbar_actions {
	    display: block;
	}

	#lgo {
	    display: none;
	}

	#content {
	    padding: 0;
	}
}