diff --git a/searx/static/default/css/style.css b/searx/static/default/css/style.css
index be98f6df9..51b06b8c3 100644
--- a/searx/static/default/css/style.css
+++ b/searx/static/default/css/style.css
@@ -1 +1,86 @@
-html{font-family:sans-serif;font-size:.9em;-webkit-text-size-adjust:100%;-ms-text-size-adjust:100%;-moz-text-size-adjust:100%;text-size-adjust:100%;color:#444;padding:0;margin:0}body,#container{padding:0;margin:0}#container{width:100%;position:absolute;top:0}.search{padding:0;margin:0}.search .checkbox_container label{font-size:.9em;border-bottom:2px solid #e8e7e6}.search .checkbox_container label:hover{border-bottom:2px solid #3498db}.search .checkbox_container input[type="checkbox"]:checked+label{border-bottom:2px solid #2980b9}#search_wrapper{position:relative;width:50em;padding:10px}.center #search_wrapper{margin-left:auto;margin-right:auto}.q{background:none repeat scroll 0 0 #fff;border:1px solid #3498db;color:#222;font-size:16px;height:28px;margin:0;outline:medium none;padding:2px;padding-left:8px;padding-right:0 !important;width:100%;z-index:2}#search_submit{position:absolute;top:13px;right:1px;padding:0;border:0;background:url('../img/search-icon.png') no-repeat;background-size:24px 24px;opacity:.8;width:24px;height:30px;font-size:0}@media screen and (max-width:50em){#search_wrapper{width:90%;clear:both;overflow:hidden}}ul.autocompleter-choices{position:absolute;margin:0;padding:0;list-style:none;border:1px solid #3498db;border-left-color:#3498db;border-right-color:#3498db;border-bottom-color:#3498db;text-align:left;font-family:Verdana,Geneva,Arial,Helvetica,sans-serif;z-index:50;background-color:#fff;color:#444}ul.autocompleter-choices li{position:relative;margin:-2px 0 0 0;padding:.2em 1.5em .2em 1em;display:block;float:none !important;cursor:pointer;font-weight:normal;white-space:nowrap;font-size:1em;line-height:1.5em}ul.autocompleter-choices li.autocompleter-selected{background-color:#444;color:#fff}ul.autocompleter-choices li.autocompleter-selected span.autocompleter-queried{color:#9fcfff}ul.autocompleter-choices span.autocompleter-queried{display:inline;float:none;font-weight:bold;margin:0;padding:0}.row{max-width:800px;margin:20px auto;text-align:justify}.row h1{font-size:3em;margin-top:50px}.row p{padding:0 10px;max-width:700px}.row h3,.row ul{margin:4px 8px}.hmarg{margin:0 20px;border:1px solid #3498db;padding:4px 10px}a:link.hmarg{color:#3498db}a:visited.hmarg{color:#3498db}a:active.hmarg{color:#3498db}a:hover.hmarg{color:#3498db}.top_margin{margin-top:60px}.center{text-align:center}h1{font-size:5em}div.title{background:url('../img/searx.png') no-repeat;width:100%;min-height:80px;background-position:center}div.title h1{visibility:hidden}input[type="submit"]{padding:2px 6px;margin:2px 4px;display:inline-block;background:#3498db;color:#fff;-webkit-border-radius:4px;-moz-border-radius:4px;border-radius:4px;border:0;cursor:pointer}input[type="checkbox"]{visibility:hidden}fieldset{margin:8px;border:1px solid #3498db}#categories{margin:0 10px;-webkit-touch-callout:none;-webkit-user-select:none;-khtml-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none}.checkbox_container{display:inline-block;position:relative;margin:0 3px;padding:0}.checkbox_container input{display:none}.checkbox_container label,.engine_checkbox label{cursor:pointer;padding:4px 10px;margin:0;display:block;text-transform:capitalize;-webkit-touch-callout:none;-webkit-user-select:none;-khtml-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none}.checkbox_container input[type="checkbox"]:checked+label{background:#3498db;color:#fff}.engine_checkbox{padding:4px}label.allow{background:#e74c3c;padding:4px 8px;color:#fff;display:none}label.deny{background:#2ecc71;padding:4px 8px;color:#444;display:inline}.engine_checkbox input[type="checkbox"]:checked+label:nth-child(2)+label{display:none}.engine_checkbox input[type="checkbox"]:checked+label.allow{display:inline}a{text-decoration:none;color:#1a11be}a:visited{color:#8e44ad}.result{margin:19px 0 18px 0;padding:0;clear:both}.result_title{margin-bottom:0}.result_title a{color:#2980b9;font-weight:normal;font-size:1.1em}.result_title a:hover{text-decoration:underline}.result_title a:visited{color:#8e44ad}.cache_link{font-size:10px !important}.result h3{font-size:1em;word-wrap:break-word;margin:5px 0 1px 0;padding:0}.result .content{font-size:.8em;margin:0;padding:0;max-width:54em;word-wrap:break-word;line-height:1.24}.result .content img{float:left;margin-right:5px;max-width:200px;max-height:100px}.result .content br.last{clear:both}.result .url{font-size:.8em;margin:0 0 3px 0;padding:0;max-width:54em;word-wrap:break-word;color:#c0392b}.result .published_date{font-size:.8em;color:#888;Margin:5px 20px}.result .thumbnail{width:400px}.engines{color:#888}.small_font{font-size:.8em}.small p{margin:2px 0}.right{float:right}.invisible{display:none}.left{float:left}.highlight{color:#094089}.content .highlight{color:#000}.image_result{display:inline-block;margin:10px 10px;position:relative;max-height:160px}.image_result img{border:0;max-height:160px}.image_result p{margin:0;padding:0}.image_result p span a{display:none;color:#fff}.image_result p:hover span a{display:block;position:absolute;bottom:0;right:0;padding:4px;background-color:rgba(0,0,0,0.6);font-size:.7em}.torrent_result{border-left:10px solid #d3d3d3;padding-left:3px}.torrent_result p{margin:3px;font-size:.8em}.definition_result{border-left:10px solid #808080;padding-left:3px}.percentage{position:relative;width:300px}.percentage div{background:#444}table{width:100%}td{padding:0 4px}tr:hover{background:#ddd}#results{margin:auto;padding:0;width:50em;margin-bottom:20px}#sidebar{position:fixed;bottom:10px;left:10px;margin:0 2px 5px 5px;padding:0 2px 2px 2px;width:14em}#sidebar input{padding:0;margin:3px;font-size:.8em;display:inline-block;background:transparent;color:#444;cursor:pointer}#sidebar input[type="submit"]{text-decoration:underline}#suggestions span{display:block}#suggestions,#answers{margin-top:20px}#suggestions input,#answers input,#infoboxes input{padding:0;margin:3px;font-size:.8em;display:inline-block;background:transparent;color:#444;cursor:pointer}#suggestions input[type="submit"],#answers input[type="submit"],#infoboxes input[type="submit"]{text-decoration:underline}#suggestions form,#answers form,#infoboxes form{display:inline-block;min-width:210px}#infoboxes{position:absolute;top:100px;right:20px;margin:0 2px 5px 5px;padding:0 2px 2px;max-width:21em}#infoboxes .infobox{margin:10px 0 10px;border:1px solid #ddd;padding:5px;font-size:.8em}#infoboxes .infobox img{max-width:20em;max-heigt:12em;display:block;margin:5px;padding:5px}#infoboxes .infobox h2{margin:0}#infoboxes .infobox table{width:auto}#infoboxes .infobox table td{vertical-align:top}#infoboxes .infobox input{font-size:1em}#infoboxes .infobox br{clear:both}#search_url{margin-top:8px}#search_url input{border:1px solid #888;padding:4px;color:#444;width:14em;display:block;margin:4px;font-size:.8em}#preferences{top:10px;padding:0;border:0;background:url('../img/preference-icon.png') no-repeat;background-size:28px 28px;opacity:.8;width:28px;height:30px;display:block}#preferences *{display:none}#pagination{clear:both}#pagination br{clear:both}#apis{margin-top:8px;clear:both}@media screen and (max-width:50em){#results{margin:auto;padding:0;width:90%}.github{display:none}.checkbox_container{display:block;width:90%}.checkbox_container label{border-bottom:0}.preferences_container{display:none;postion:fixed !important;top:100px;right:0}}@media screen and (max-width:75em){div.title h1{font-size:1em}html.touch #categories{width:95%;height:30px;text-align:left;overflow-x:scroll;overflow-y:hidden;-webkit-overflow-scrolling:touch}html.touch #categories #categories_container{width:1000px;width:-moz-max-content;width:-webkit-max-content;width:max-content}html.touch #categories #categories_container .checkbox_container{display:inline-block;width:auto}#categories{font-size:90%;clear:both}#categories .checkbox_container{margin-top:2px;margin:auto}#suggestions,#answers{margin-top:5px}#infoboxes{position:inherit;max-width:inherit}#infoboxes .infobox{clear:both}#infoboxes .infobox img{float:left;max-width:10em}#categories{font-size:90%;clear:both}#categories .checkbox_container{margin-top:2px;margin:auto}#sidebar{position:static;max-width:50em;margin:0 0 2px 0;padding:0;float:none;border:none;width:auto}#sidebar input{border:0}#apis{display:none}#search_url{display:none}.result{border-top:1px solid #e8e7e6;margin:8px 0 8px 0}.result .thumbnail{max-width:98%}.image_result{max-width:98%}.image_result img{max-width:98%}}.favicon{float:left;margin-right:4px;margin-top:2px}.preferences_back{background:none repeat scroll 0 0 #3498db;border:0 none;-webkit-border-radius:4px;-moz-border-radius:4px;border-radius:4px;cursor:pointer;display:inline-block;margin:2px 4px;padding:4px 6px}.preferences_back a{color:#fff}
\ No newline at end of file
+html{font-family:sans-serif;font-size:.9em;-webkit-text-size-adjust:100%;-ms-text-size-adjust:100%;-moz-text-size-adjust:100%;text-size-adjust:100%;color:#444;padding:0;margin:0}
+body,#container{padding:0;margin:0}
+#container{width:100%;position:absolute;top:0}
+.search{padding:0;margin:0}.search .checkbox_container label{font-size:.9em;border-bottom:2px solid #e8e7e6}
+.search .checkbox_container label:hover{border-bottom:2px solid #3498db}
+.search .checkbox_container input[type="checkbox"]:checked+label{border-bottom:2px solid #2980b9}
+#search_wrapper{position:relative;width:50em;padding:10px}
+.center #search_wrapper{margin-left:auto;margin-right:auto}
+.q{background:none repeat scroll 0 0 #fff;border:1px solid #3498db;color:#222;font-size:16px;height:28px;margin:0;outline:medium none;padding:2px;padding-left:8px;padding-right:0 !important;width:100%;z-index:2}
+#search_submit{position:absolute;top:13px;right:1px;padding:0;border:0;background:url('../img/search-icon.png') no-repeat;background-size:24px 24px;opacity:.8;width:24px;height:30px;font-size:0}
+@media screen and (max-width:50em){#search_wrapper{width:90%;clear:both;overflow:hidden}}ul.autocompleter-choices{position:absolute;margin:0;padding:0;list-style:none;border:1px solid #3498db;border-left-color:#3498db;border-right-color:#3498db;border-bottom-color:#3498db;text-align:left;font-family:Verdana,Geneva,Arial,Helvetica,sans-serif;z-index:50;background-color:#fff;color:#444}ul.autocompleter-choices li{position:relative;margin:-2px 0 0 0;padding:.2em 1.5em .2em 1em;display:block;float:none !important;cursor:pointer;font-weight:normal;white-space:nowrap;font-size:1em;line-height:1.5em}ul.autocompleter-choices li.autocompleter-selected{background-color:#444;color:#fff}ul.autocompleter-choices li.autocompleter-selected span.autocompleter-queried{color:#9fcfff}
+ul.autocompleter-choices span.autocompleter-queried{display:inline;float:none;font-weight:bold;margin:0;padding:0}
+.row{max-width:800px;margin:20px auto;text-align:justify}.row h1{font-size:3em;margin-top:50px}
+.row p{padding:0 10px;max-width:700px}
+.row h3,.row ul{margin:4px 8px}
+.hmarg{margin:0 20px;border:1px solid #3498db;padding:4px 10px}
+a:link.hmarg{color:#3498db}
+a:visited.hmarg{color:#3498db}
+a:active.hmarg{color:#3498db}
+a:hover.hmarg{color:#3498db}
+.top_margin{margin-top:60px}
+.center{text-align:center}
+h1{font-size:5em}
+div.title{background:url('../img/searx.png') no-repeat;width:100%;min-height:80px;background-position:center}div.title h1{visibility:hidden}
+input[type="submit"]{padding:2px 6px;margin:2px 4px;display:inline-block;background:#3498db;color:#fff;-webkit-border-radius:4px;-moz-border-radius:4px;border-radius:4px;border:0;cursor:pointer}
+input[type="checkbox"]{visibility:hidden}
+fieldset{margin:8px;border:1px solid #3498db}
+#categories{margin:0 10px;-webkit-touch-callout:none;-webkit-user-select:none;-khtml-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none}
+.checkbox_container{display:inline-block;position:relative;margin:0 3px;padding:0}.checkbox_container input{display:none}
+.checkbox_container label,.engine_checkbox label{cursor:pointer;padding:4px 10px;margin:0;display:block;text-transform:capitalize;-webkit-touch-callout:none;-webkit-user-select:none;-khtml-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none}
+.checkbox_container input[type="checkbox"]:checked+label{background:#3498db;color:#fff}
+.engine_checkbox{padding:4px}
+label.allow{background:#e74c3c;padding:4px 8px;color:#fff;display:none}
+label.deny{background:#2ecc71;padding:4px 8px;color:#444;display:inline}
+.engine_checkbox input[type="checkbox"]:checked+label:nth-child(2)+label{display:none}
+.engine_checkbox input[type="checkbox"]:checked+label.allow{display:inline}
+a{text-decoration:none;color:#1a11be}a:visited{color:#8e44ad}
+.result{margin:19px 0 18px 0;padding:0;clear:both}
+.result_title{margin-bottom:0}.result_title a{color:#2980b9;font-weight:normal;font-size:1.1em}.result_title a:hover{text-decoration:underline}
+.result_title a:visited{color:#8e44ad}
+.cache_link{font-size:10px !important}
+.result h3{font-size:1em;word-wrap:break-word;margin:5px 0 1px 0;padding:0}
+.result .content{font-size:.8em;margin:0;padding:0;max-width:54em;word-wrap:break-word;line-height:1.24}.result .content img{float:left;margin-right:5px;max-width:200px;max-height:100px}
+.result .content br.last{clear:both}
+.result .url{font-size:.8em;margin:0 0 3px 0;padding:0;max-width:54em;word-wrap:break-word;color:#c0392b}
+.result .published_date{font-size:.8em;color:#888;Margin:5px 20px}
+.result .thumbnail{width:400px}
+.engines{color:#888}
+.small_font{font-size:.8em}
+.small p{margin:2px 0}
+.right{float:right}
+.invisible{display:none}
+.left{float:left}
+.highlight{color:#094089}
+.content .highlight{color:#000}
+.image_result{display:inline-block;margin:10px 10px;position:relative;max-height:160px}.image_result img{border:0;max-height:160px}
+.image_result p{margin:0;padding:0}.image_result p span a{display:none;color:#fff}
+.image_result p:hover span a{display:block;position:absolute;bottom:0;right:0;padding:4px;background-color:rgba(0,0,0,0.6);font-size:.7em}
+.torrent_result{border-left:10px solid #d3d3d3;padding-left:3px}.torrent_result p{margin:3px;font-size:.8em}
+.definition_result{border-left:10px solid #808080;padding-left:3px}
+.percentage{position:relative;width:300px}.percentage div{background:#444}
+table{width:100%}
+td{padding:0 4px}
+tr:hover{background:#ddd}
+#results{margin:auto;padding:0;width:50em;margin-bottom:20px}
+#sidebar{position:fixed;bottom:10px;left:10px;margin:0 2px 5px 5px;padding:0 2px 2px 2px;width:14em}#sidebar input{padding:0;margin:3px;font-size:.8em;display:inline-block;background:transparent;color:#444;cursor:pointer}
+#sidebar input[type="submit"]{text-decoration:underline}
+#suggestions span{display:block}
+#suggestions,#answers{margin-top:20px;max-width:54em}
+#suggestions input,#answers input,#infoboxes input{padding:0;margin:3px;font-size:.8em;display:inline-block;background:transparent;color:#444;cursor:pointer}
+#suggestions input[type="submit"],#answers input[type="submit"],#infoboxes input[type="submit"]{text-decoration:underline}
+#suggestions form,#answers form,#infoboxes form{display:inline-block;min-width:210px}
+#infoboxes{position:absolute;top:100px;right:20px;margin:0 2px 5px 5px;padding:0 2px 2px;max-width:21em}#infoboxes .infobox{margin:10px 0 10px;border:1px solid #ddd;padding:5px;font-size:.8em;}#infoboxes .infobox img{max-width:20em;max-heigt:12em;display:block;margin:5px;padding:5px}
+#infoboxes .infobox h2{margin:0}
+#infoboxes .infobox table{width:auto}#infoboxes .infobox table td{vertical-align:top}
+#infoboxes .infobox input{font-size:1em}
+#infoboxes .infobox br{clear:both}
+#search_url{margin-top:8px}#search_url input{border:1px solid #888;padding:4px;color:#444;width:14em;display:block;margin:4px;font-size:.8em}
+#preferences{top:10px;padding:0;border:0;background:url('../img/preference-icon.png') no-repeat;background-size:28px 28px;opacity:.8;width:28px;height:30px;display:block}#preferences *{display:none}
+#pagination{clear:both}#pagination br{clear:both}
+#apis{margin-top:8px;clear:both}
+#categories_container{position:relative}
+@media screen and (max-width:50em){#results{margin:auto;padding:0;width:90%} .github{display:none} .checkbox_container{display:block;width:90%}.checkbox_container label{border-bottom:0} .preferences_container{display:none;postion:fixed !important;top:100px;right:0}}@media screen and (max-width:75em){div.title h1{font-size:1em} html.touch #categories{width:95%;height:30px;text-align:left;overflow-x:scroll;overflow-y:hidden;-webkit-overflow-scrolling:touch}html.touch #categories #categories_container{width:1000px;width:-moz-max-content;width:-webkit-max-content;width:max-content}html.touch #categories #categories_container .checkbox_container{display:inline-block;width:auto} #categories{font-size:90%;clear:both}#categories .checkbox_container{margin-top:2px;margin:auto} #suggestions,#answers{margin-top:5px} #infoboxes{position:inherit;max-width:inherit}#infoboxes .infobox{clear:both}#infoboxes .infobox img{float:left;max-width:10em} #categories{font-size:90%;clear:both}#categories .checkbox_container{margin-top:2px;margin:auto} #sidebar{position:static;max-width:50em;margin:0 0 2px 0;padding:0;float:none;border:none;width:auto}#sidebar input{border:0} #apis{display:none} #search_url{display:none} .result{border-top:1px solid #e8e7e6;margin:8px 0 8px 0}.result .thumbnail{max-width:98%} .image_result{max-width:98%}.image_result img{max-width:98%}}.favicon{float:left;margin-right:4px;margin-top:2px}
+.preferences_back{background:none repeat scroll 0 0 #3498db;border:0 none;-webkit-border-radius:4px;-moz-border-radius:4px;border-radius:4px;cursor:pointer;display:inline-block;margin:2px 4px;padding:4px 6px}.preferences_back a{color:#fff}
+.hidden{opacity:0;overflow:hidden;font-size:.8em;position:absolute;bottom:-20px;width:100%;text-position:center;background:#fff;transition:opacity 1s ease}
+#categories_container:hover .hidden{transition:opacity 1s ease;opacity:.8}
diff --git a/searx/static/default/less/style.less b/searx/static/default/less/style.less
index 1872766d7..acc1f853a 100644
--- a/searx/static/default/less/style.less
+++ b/searx/static/default/less/style.less
@@ -529,6 +529,10 @@ tr {
 	clear: both;
 }
 
+#categories_container {
+    position: relative;
+}
+
 @media screen and (max-width: @results-width) {
 
 	#results {
@@ -685,3 +689,20 @@ tr {
 		color: @color-settings-return-font;
 	}
 }
+
+.hidden {
+    opacity: 0;
+    overflow: hidden;
+    font-size: 0.8em;
+    position: absolute;
+    bottom: -20px;
+    width: 100%;
+    text-position: center;
+    background: white;
+    transition: opacity 1s ease;
+}
+
+#categories_container:hover .hidden {
+    transition: opacity 1s ease;
+    opacity: 0.8;
+}
diff --git a/searx/templates/default/categories.html b/searx/templates/default/categories.html
index 341e234a3..017898ea7 100644
--- a/searx/templates/default/categories.html
+++ b/searx/templates/default/categories.html
@@ -2,8 +2,9 @@
     <div id="categories_container">
 {% for category in categories %}
         <div class="checkbox_container">
-             <input type="checkbox" id="checkbox_{{ category|replace(' ', '_') }}" name="category_{{ category }}" {% if category in selected_categories %}checked="checked"{% endif %} /><label for="checkbox_{{ category|replace(' ', '_') }}">{{ _(category) }}</label>
+             <input type="checkbox" id="checkbox_{{ category|replace(' ', '_') }}" name="category_{{ category }}" {% if category in selected_categories %}checked="checked"{% endif %} /><label for="checkbox_{{ category|replace(' ', '_') }}" class="tooltips">{{ _(category) }}</label>
         </div>
 {% endfor %}
+    <div class="hidden">{{ _('Click on the magnifier to perform search') }}</div>
     </div>
 </div>