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HTML 

              
                !!! 5
%head
  %link{rel: "stylesheet", type:"text/css", href:"https://netdna.bootstrapcdn.com/bootstrap/3.0.0/css/bootstrap.min.css"}
  %link{rel: "stylesheet", type:"text/css", href:"//cdnjs.cloudflare.com/ajax/libs/bootstrap-datepicker/1.2.0/css/datepicker.min.css"}
  %link{rel: "stylesheet", type:"text/css", href:"//cdnjs.cloudflare.com/ajax/libs/bootstrap-switch/1.8/css/bootstrap-switch.css"}  
  %link{rel: "stylesheet", type:"text/css", href:"https://davidstutz.github.io/bootstrap-multiselect/css/bootstrap-multiselect.css"}
  
  %script{type: "text/javascript",src: "//cdnjs.cloudflare.com/ajax/libs/jquery/2.0.3/jquery.min.js"}
  %script{type: "text/javascript",src: "//cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.0.0/js/bootstrap.min.js"}
  %script{type: "text/javascript",src: "//cdnjs.cloudflare.com/ajax/libs/bootstrap-datepicker/1.2.0/js/bootstrap-datepicker.min.js"}
  %script{type: "text/javascript",src: "//cdnjs.cloudflare.com/ajax/libs/bootstrap-switch/1.8/js/bootstrap-switch.min.js"}
  %script{type: "text/javascript",src: "https://davidstutz.github.io/bootstrap-multiselect/js/bootstrap-multiselect.js"}
%body  
  .container  
    .panel.panel-primary.dialog-panel
      .panel-heading 
        %h5 Almaguin Campground - Reservation
      .panel-body
        %form.form-horizontal{role: "form"}
          .form-group
            %label.control-label.col-md-2.col-md-offset-2{for: "id_accomodation"} Accomodation
            .col-md-2
              %select.form-control{id: "id_accomodation"}
                %option RV
                %option Tent
                %option Cabin/Lodging
          .form-group
            %label.control-label.col-md-2.col-md-offset-2{for: "id_title"} Name
            .col-md-8
              .col-md-2
                .form-group.internal
                  %select.form-control{id: "id_title"}
                    %option Mr
                    %option Ms                    
                    %option Mrs
                    %option Miss
                    %option Dr
              .col-md-3.indent-small
                .form-group.internal
                  %input.form-control{id: "id_first_name", type: "text", placeholder: "First Name"}
              .col-md-3.indent-small
                .form-group.internal
                  %input.form-control{id: "id_last_name", type: "text", placeholder: "Last Name"}
          .form-group    
            %label.control-label.col-md-2.col-md-offset-2{for: "id_adults"} Guests        
            .col-md-8
              .col-md-2
                .form-group.internal
                  %input.form-control.col-md-8{id: "id_adults", type: "number", placeholder: "18+ years"}
              .col-md-3.indent-small
                .form-group.internal
                  %input.form-control{id: "id_children", type: "number", placeholder: "2-17 years"}          
              .col-md-3.indent-small
                .form-group.internal
                  %input.form-control{id: "id_children_free", type: "number", placeholder: "< 2 years"}
          .form-group    
            %label.control-label.col-md-2.col-md-offset-2{for: "id_email"} Contact
            .col-md-6
              .form-group
                .col-md-11
                  %input.form-control{id: "id_email", type: "text", placeholder: "E-mail"}
              .form-group.internal
                .col-md-11
                  %input.form-control{id: "id_phone", type: "text", placeholder: "Phone: (xxx) - xxx xxxx"}
          .form-group 
            %label.control-label.col-md-2.col-md-offset-2{for: "id_checkin"} Checkin
            .col-md-8
              .col-md-3
                .form-group.internal.input-group
                  %input.form-control.datepicker{id: "id_checkin"}  
                  %span.input-group-addon
                    %i.glyphicon.glyphicon-calendar
              %label.control-label.col-md-2{for: "id_checkout"} Checkout
              .col-md-3
                .form-group.internal.input-group
                  %input.form-control.datepicker{id: "id_checkout"}  
                  %span.input-group-addon
                    %i.glyphicon.glyphicon-calendar
          .form-group          
            %label.control-label.col-md-2.col-md-offset-2{for: "id_equipment"} Equipment type
            .col-md-8
              .col-md-3          
                .form-group.internal
                  %select.form-control{id: "id_equipment"}
                    %option Travel trailer
                    %option Fifth wheel
                    %option RV/Motorhome
                    %option Tent trailer
                    %option Pickup camper
                    %option Camper van
              .col-md-9
                .form-group.internal
                  %label.control-label.col-md-3{for:"id_slide"} Slide-outs
                  .make-switch{id:"id_slide_switch","data-on-label" => "YES", "data-off-label"=> "NO"}
                    %input{type:"checkbox", value:"chk_hydro", id: "id_slide"}
          .form-group    
            %label.control-label.col-md-2.col-md-offset-2{for: "id_service"} Required Service
            .col-md-8
              %select.multiselect{multiple:"multiple",id:"id_service"}
                %option{value:"hydro"} Hydro
                %option{value:"water"} Water
                %option{value:"sewer"} Sewer              
          .form-group    
            %label.control-label.col-md-2.col-md-offset-2{for: "id_pets"} Pets
            .col-md-8
              .make-switch{id:"id_pets_switch", "data-on-label" => "YES", "data-off-label"=> "NO"}
                %input{type:"checkbox", value:"chk_hydro", id: "id_pets"}
          .form-group    
            %label.control-label.col-md-2.col-md-offset-2{for: "id_comments"} Comments
            .col-md-6
              %textarea.form-control{id: "id_comments", rows: "3", placeholder: "Additional comments"}      
          .form-group         
            .col-md-offset-4.col-md-3
              %button.btn-lg.btn-primary{type: "submit"} Request Reservation
            .col-md-3
              %button.btn-lg.btn-danger{type: "submit", style: "float:right"} Cancel
!

CSS 

              
                .indent-small {
  margin-left: 5px;
}
.form-group.internal {
  margin-bottom: 0;
}

.dialog-panel {
  margin: 10px;
}

.datepicker-dropdown {
  z-index: 200 !important;
}

.panel-body {  
  
  background: #e5e5e5; /* Old browsers */
  background: -moz-radial-gradient(center, ellipse cover,  #e5e5e5 0%, #ffffff 100%); /* FF3.6+ */
  background: -webkit-gradient(radial, center center, 0px, center center, 100%, color-stop(0%,#e5e5e5), color-stop(100%,#ffffff)); /* Chrome,Safari4+ */
  background: -webkit-radial-gradient(center, ellipse cover,  #e5e5e5 0%,#ffffff 100%); /* Chrome10+,Safari5.1+ */
  background: -o-radial-gradient(center, ellipse cover,  #e5e5e5 0%,#ffffff 100%); /* Opera 12+ */
  background: -ms-radial-gradient(center, ellipse cover,  #e5e5e5 0%,#ffffff 100%); /* IE10+ */
  background: radial-gradient(ellipse at center,  #e5e5e5 0%,#ffffff 100%); /* W3C */
filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#e5e5e5', endColorstr='#ffffff',GradientType=1 ); /* IE6-9 fallback on horizontal gradient */

  font: 600 15px "Open Sans",Arial,sans-serif;
}

label.control-label {
  font-weight: 600;
  color: #777;  
}
!

JS 

              
                $(document).ready(function() {  
  $('.multiselect').multiselect();
  $('.datepicker').datepicker();  
});
!
999px

Console