[enh] search input "design"

searx/static/css/style.css

 .percentage div { background: #444444; }
 td { padding: 0 4px; }
 tr:hover td { background: #DDDDDD; }
+
+
+#search_wrapper { position: relative; max-width: 600px; margin: 10px; }
+.center #search_wrapper { margin-left: auto; margin-right: auto; }
+.q {
+  -webkit-box-sizing: border-box;
+  -moz-box-sizing: border-box;
+  width: 100%;
+  box-sizing: border-box;
+  border: 1px solid #c8c8c8;
+  border-bottom-color: #d2e2e7;
+  -webkit-border-radius: 1px;
+  -moz-border-radius: 1px;
+  border-radius: 1px;
+  -webkit-box-shadow: inset 0 1px 2px rgba(0,0,0,0.4), 0 0 0 4px #dddddd;
+  -moz-box-shadow: inset 0 1px 2px rgba(0,0,0,0.4), 0 0 0 4px #dddddd;
+  box-shadow: inset 0 1px 2px rgba(0,0,0,0.4), 0 0 0 4px #dddddd;
+  -webkit-transition: all 0.4s linear;
+  -moz-transition: all 0.4s linear;
+  transition: all 0.4s linear;
+}
+.q:focus {
+  outline: none;
+  -webkit-box-shadow: inset 0 1px 2px rgba(0,0,0,0.6), 0 0 0 4px #dddddd;
+  -moz-box-shadow: inset 0 1px 2px rgba(0,0,0,0.6), 0 0 0 4px #dddddd;
+  box-shadow: inset 0 1px 2px rgba(0,0,0,0.6), 0 0 0 4px #dddddd;
+}
+#search_submit { position: absolute; top: 3px; right: 3px; border: 0; padding: 6px; border-left: 4px solid #dddddd; }
+
+#results { margin-left: 10px; }

searx/templates/search.html

-<form method="post" action="/">
+<form method="post" action="/" id="search_form">
+<div id="search_wrapper">
     <input type="text" class="q" name="q" tabindex="1" autocomplete="off" {% if q %}value="{{ q }}"{% endif %}/>
-    <input type="submit" value="search" />
+    <input type="submit" value="search" id="search_submit" />
+</div>
     <p>
     {% for category in categories %}
         <div class="checkbox_container">