JSFiddle - React, Tailwind, and code Playground

HTML

<form id=gh-as-o action="123">

<fieldset>
 <legend>Include in results</legend>

 <label>
  <input type=checkbox name=LH_TitleDesc >
  Title and description
 </label>
 <label>
  <input id=gh_as_LH_Complete type=checkbox name=LH_Complete >
  Completed Listings
 </label>

 <label>
  <input id=gh_as_fspt type=checkbox name=_fspt>
  Items near me
 </label>
 
 <div class=gh_as_block>
  <input type=radio name=UNK title="Filter by distance">
  <select name="_sadis" title="Distance of items from zipcode">
    <option value=10>10</option>
    <option value=25>25</option>
    <option value=50>50</option>
    <option value=75>75</option>
    <option value=100>100</option>
    <option value=150>150</option>
    <option selected=selected value=200>200</option>
    <option value=250>250</option>
    <option value=500>500</option>
    <option value=750>750</option>
    <option value=1000>1000</option>
    <option value=1500>1500</option>
    <option value=2000>2000</option>
  </select> of 
  <input type="text" placeholder="zip code" name="_fpos" maxlength="10" size="8">
 </div>
 
 <div class=gh_as_block>
  <input type=radio name=UNK title="Filter by city">
  <select id="htmlIDforCityv4-39" name="_fsct" title="Select popular city to filter items by">
   <option value="">Select a popular city...</option>
   <optgroup label="test group">
    <option value="4515">AK - Anchorage</option><option value="4516">AL - Birmingham</option><option value="4517">AL - Mobile</option><option value="4518">AR - Little Rock</option><option value="4519">AZ - Phoenix</option><option value="4520">AZ - Tucson</option>
   </optgroup>
   <optgroup label="California">
    <option value="4521">CA - Fresno</option><option value="4522">CA - Los Angeles</option><option value="4523">CA - Oakland</option><option value="4524">CA - Orange County</option><option value="4525">CA - Riverside</option><option value="4526">CA - Sacramento</option><option value="4527">CA - San Diego</option><option value="4528">CA - San...

CSS

#gh-as-o fieldset { border:0; margin:0 10px; padding:0;  }    /* remove default border - set common margin/padding */
  #gh-as-o > fieldset, #gh-as-o > div { float:left; }        /* float the fieldsets/div children */
  #gh-as-o fieldset { *float:left; }                         /* for IE6 */
  #gh-as-o label, .gh_as_block { float:left; clear:both;}    /* each label, and block of labels, is floated */
  
  #gh-as-o legend {                                             /* Section titles */
   color:#333; font:bold 14px Arial; padding:10px 0;  
  }        
  #gh-as-o label, #gh-as-o select, #gh-as-o input {             /* labels */
     vertical-align:middle;
     color:#333; font:11px Arial; }        
  #gh-as-o input[type="checkbox"] {                             /* move the checkboxes down a little */
     position:relative; top:-1px; }   
     
  #gh-as-o ul {                                                 /* footer links */
     clear:both; border-top:1px dashed #d8d8d8;
     text-align:right; padding:10px 0; margin:10px 0;
     float:left; width:98%;                                    /* needed to force ul to clear the floated fieldsets */
  }     
  #gh-as-o li { 
     display:inline; 
     font:11px Arial;
     padding:5px;
  }
  #gh-as-o li:first-child:after { content:' | ' }