zotero/chrome/content/zotero-platform/win/overlay.css

.zotero-tb-button:not(:first-child) {
	margin-left: 5px;
}

#zotero-tb-search .textbox-search-icon {
	visibility: hidden;
}

#zotero-tb-search-menu-button {
	margin: 0 -1px 0 -4px;
	padding: 0;
	border: 0;
	background: transparent;
	list-style-image: url("chrome://browser/skin/mainwindow-dropdown-arrow.png");
	-moz-image-region: rect(0, 13px, 11px, 0);
}

#zotero-tb-search-menu-button .button-menu-dropmarker {
	display: none;
}

#zotero-tb-search-menu-button:hover:active,
#zotero-tb-search-menu-button[open="true"] {
	-moz-image-region: rect(0, 26px, 11px, 13px);
}

#zotero-tb-sync-warning {
	margin-right: 2px;
}


#zotero-tb-sync {
	margin-right: 1px;
}

#zotero-tb-fullscreen {
	margin-left: 2px;
	margin-right: 5px;
}

#zotero-view-tabbox tab {
	padding-left: .7em;
	padding-right: .7em;
}