OK, before we move forward on this, can you go to WP Admin -> Search & Filter -> Settings -> JavaScript & CSS -> Combobox Script and change this to Select2.
Let me know when done. FYI this is the complete Select2 stylesheet:
.select2-container {
box-sizing:border-box;
display:inline-block;
margin:0;
position:relative;
vertical-align:middle
}
.select2-container .select2-selection--single {
box-sizing:border-box;
cursor:pointer;
display:block;
height:28px;
user-select:none;
-webkit-user-select:none
}
.select2-container .select2-selection--single .select2-selection__rendered {
display:block;
padding-left:8px;
padding-right:20px;
overflow:hidden;
text-overflow:ellipsis;
white-space:nowrap
}
.select2-container .select2-selection--single .select2-selection__clear {
position:relative
}
.select2-container[dir=rtl] .select2-selection--single .select2-selection__rendered {
padding-right:8px;
padding-left:20px
}
.select2-container .select2-selection--multiple {
box-sizing:border-box;
cursor:pointer;
display:block;
min-height:32px;
user-select:none;
-webkit-user-select:none
}
.select2-container .select2-selection--multiple .select2-selection__rendered {
display:inline-block;
overflow:hidden;
padding-left:8px;
text-overflow:ellipsis;
white-space:nowrap
}
.select2-container .select2-search--inline {
float:left
}
.select2-container .select2-search--inline .select2-search__field {
box-sizing:border-box;
border:none;
font-size:100%;
margin-top:5px;
padding:0
}
.select2-container .select2-search--inline .select2-search__field::-webkit-search-cancel-button {
-webkit-appearance:none
}
.select2-dropdown {
background-color:#fff;
border:1px solid #aaa;
border-radius:4px;
box-sizing:border-box;
display:block;
position:absolute;
left:-100000px;
width:100%;
z-index:1051
}
.select2-results {
display:block
}
.select2-results__options {
list-style:none;
margin:0;
padding:0
}
.select2-results__option {
padding:6px;
user-select:none;
-webkit-user-select:none
}
.select2-results__option[aria-selected] {
cursor:pointer
}
.select2-container--open .select2-dropdown {
left:0
}
.select2-container--open .select2-dropdown--above {
border-bottom:none;
border-bottom-left-radius:0;
border-bottom-right-radius:0
}
.select2-container--open .select2-dropdown--below {
border-top:none;
border-top-left-radius:0;
border-top-right-radius:0
}
.select2-search--dropdown {
display:block;
padding:4px
}
.select2-search--dropdown .select2-search__field {
padding:4px;
width:100%;
box-sizing:border-box
}
.select2-search--dropdown .select2-search__field::-webkit-search-cancel-button {
-webkit-appearance:none
}
.select2-search--dropdown.select2-search--hide {
display:none
}
.select2-close-mask {
border:0;
margin:0;
padding:0;
display:block;
position:fixed;
left:0;
top:0;
min-height:100%;
min-width:100%;
height:auto;
width:auto;
opacity:0;
z-index:99;
background-color:#fff;
filter:alpha(opacity=0)
}
.select2-hidden-accessible {
border:0!important;
clip:rect(0 0 0 0)!important;
height:1px!important;
margin:-1px!important;
overflow:hidden!important;
padding:0!important;
position:absolute!important;
width:1px!important
}
.select2-container--classic .select2-results>.select2-results__options,.select2-container--default .select2-results>.select2-results__options {
max-height:200px;
overflow-y:auto
}
.select2-container--default .select2-selection--single {
background-color:#fff;
border:1px solid #aaa;
border-radius:4px
}
.select2-container--default .select2-selection--single .select2-selection__rendered {
color:#444;
line-height:28px
}
.select2-container--default .select2-selection--single .select2-selection__clear {
cursor:pointer;
float:right;
font-weight:700
}
.select2-container--default .select2-selection--single .select2-selection__placeholder {
color:#999
}
.select2-container--default .select2-selection--single .select2-selection__arrow {
height:26px;
position:absolute;
top:1px;
right:1px;
width:20px
}
.select2-container--default .select2-selection--single .select2-selection__arrow b {
border-color:#888 transparent transparent;
border-style:solid;
border-width:5px 4px 0;
height:0;
left:50%;
margin-left:-4px;
margin-top:-2px;
position:absolute;
top:50%;
width:0
}
.select2-container--default[dir=rtl] .select2-selection--single .select2-selection__clear {
float:left
}
.select2-container--default[dir=rtl] .select2-selection--single .select2-selection__arrow {
left:1px;
right:auto
}
.select2-container--default.select2-container--disabled .select2-selection--single {
background-color:#eee;
cursor:default
}
.select2-container--default.select2-container--disabled .select2-selection--single .select2-selection__clear {
display:none
}
.select2-container--default.select2-container--open .select2-selection--single .select2-selection__arrow b {
border-color:transparent transparent #888;
border-width:0 4px 5px
}
.select2-container--default .select2-selection--multiple {
background-color:#fff;
border:1px solid #aaa;
border-radius:4px;
cursor:text
}
.select2-container--default .select2-selection--multiple .select2-selection__rendered {
box-sizing:border-box;
list-style:none;
margin:0;
padding:0 5px;
width:100%
}
.select2-container--default .select2-selection--multiple .select2-selection__rendered li {
list-style:none
}
.select2-container--default .select2-selection--multiple .select2-selection__placeholder {
color:#999;
margin-top:5px;
float:left
}
.select2-container--default .select2-selection--multiple .select2-selection__clear {
cursor:pointer;
float:right;
font-weight:700;
margin-top:5px;
margin-right:10px
}
.select2-container--default .select2-selection--multiple .select2-selection__choice {
background-color:#e4e4e4;
border:1px solid #aaa;
border-radius:4px;
cursor:default;
float:left;
margin-right:5px;
margin-top:5px;
padding:0 5px
}
.select2-container--default .select2-selection--multiple .select2-selection__choice__remove {
color:#999;
cursor:pointer;
display:inline-block;
font-weight:700;
margin-right:2px
}
.select2-container--default .select2-selection--multiple .select2-selection__choice__remove:hover {
color:#333
}
.select2-container--default[dir=rtl] .select2-selection--multiple .select2-search--inline,.select2-container--default[dir=rtl] .select2-selection--multiple .select2-selection__choice,.select2-container--default[dir=rtl] .select2-selection--multiple .select2-selection__placeholder {
float:right
}
.select2-container--default[dir=rtl] .select2-selection--multiple .select2-selection__choice {
margin-left:5px;
margin-right:auto
}
.select2-container--default[dir=rtl] .select2-selection--multiple .select2-selection__choice__remove {
margin-left:2px;
margin-right:auto
}
.select2-container--default.select2-container--focus .select2-selection--multiple {
border:1px solid #000;
outline:0
}
.select2-container--default.select2-container--disabled .select2-selection--multiple {
background-color:#eee;
cursor:default
}
.select2-container--default.select2-container--disabled .select2-selection__choice__remove {
display:none
}
.select2-container--default.select2-container--open.select2-container--above .select2-selection--multiple,.select2-container--default.select2-container--open.select2-container--above .select2-selection--single {
border-top-left-radius:0;
border-top-right-radius:0
}
.select2-container--default.select2-container--open.select2-container--below .select2-selection--multiple,.select2-container--default.select2-container--open.select2-container--below .select2-selection--single {
border-bottom-left-radius:0;
border-bottom-right-radius:0
}
.select2-container--default .select2-search--dropdown .select2-search__field {
border:1px solid #aaa
}
.select2-container--default .select2-search--inline .select2-search__field {
background:0 0;
border:none;
outline:0;
box-shadow:none;
-webkit-appearance:textfield
}
.select2-container--default .select2-results__option[role=group] {
padding:0
}
.select2-container--default .select2-results__option[aria-disabled=true] {
color:#999
}
.select2-container--default .select2-results__option[aria-selected=true] {
background-color:#ddd
}
.select2-container--default .select2-results__option .select2-results__option {
padding-left:1em
}
.select2-container--default .select2-results__option .select2-results__option .select2-results__group {
padding-left:0
}
.select2-container--default .select2-results__option .select2-results__option .select2-results__option {
margin-left:-1em;
padding-left:2em
}
.select2-container--default .select2-results__option .select2-results__option .select2-results__option .select2-results__option {
margin-left:-2em;
padding-left:3em
}
.select2-container--default .select2-results__option .select2-results__option .select2-results__option .select2-results__option .select2-results__option {
margin-left:-3em;
padding-left:4em
}
.select2-container--default .select2-results__option .select2-results__option .select2-results__option .select2-results__option .select2-results__option .select2-results__option {
margin-left:-4em;
padding-left:5em
}
.select2-container--default .select2-results__option .select2-results__option .select2-results__option .select2-results__option .select2-results__option .select2-results__option .select2-results__option {
margin-left:-5em;
padding-left:6em
}
.select2-container--default .select2-results__option--highlighted[aria-selected] {
background-color:#5897fb;
color:#fff
}
.select2-container--default .select2-results__group {
cursor:default;
display:block;
padding:6px
}
.select2-container--classic .select2-selection--single {
background-color:#f7f7f7;
border:1px solid #aaa;
border-radius:4px;
outline:0;
background-image:-webkit-linear-gradient(top,#fff 50%,#eee 100%);
background-image:-o-linear-gradient(top,#fff 50%,#eee 100%);
background-image:linear-gradient(to bottom,#fff 50%,#eee 100%);
background-repeat:repeat-x;
filter:progid:DXImageTransform.Microsoft.gradient(startColorstr='#FFFFFFFF', endColorstr='#FFEEEEEE', GradientType=0)
}
.select2-container--classic .select2-selection--single:focus {
border:1px solid #5897fb
}
.select2-container--classic .select2-selection--single .select2-selection__rendered {
color:#444;
line-height:28px
}
.select2-container--classic .select2-selection--single .select2-selection__clear {
cursor:pointer;
float:right;
font-weight:700;
margin-right:10px
}
.select2-container--classic .select2-selection--single .select2-selection__placeholder {
color:#999
}
.select2-container--classic .select2-selection--single .select2-selection__arrow {
background-color:#ddd;
border:none;
border-left:1px solid #aaa;
border-top-right-radius:4px;
border-bottom-right-radius:4px;
height:26px;
position:absolute;
top:1px;
right:1px;
width:20px;
background-image:-webkit-linear-gradient(top,#eee 50%,#ccc 100%);
background-image:-o-linear-gradient(top,#eee 50%,#ccc 100%);
background-image:linear-gradient(to bottom,#eee 50%,#ccc 100%);
background-repeat:repeat-x;
filter:progid:DXImageTransform.Microsoft.gradient(startColorstr='#FFEEEEEE', endColorstr='#FFCCCCCC', GradientType=0)
}
.select2-container--classic .select2-selection--single .select2-selection__arrow b {
border-color:#888 transparent transparent;
border-style:solid;
border-width:5px 4px 0;
height:0;
left:50%;
margin-left:-4px;
margin-top:-2px;
position:absolute;
top:50%;
width:0
}
.select2-container--classic[dir=rtl] .select2-selection--single .select2-selection__clear {
float:left
}
.select2-container--classic[dir=rtl] .select2-selection--single .select2-selection__arrow {
border:none;
border-right:1px solid #aaa;
border-radius:4px 0 0 4px;
left:1px;
right:auto
}
.select2-container--classic.select2-container--open .select2-selection--single {
border:1px solid #5897fb
}
.select2-container--classic.select2-container--open .select2-selection--single .select2-selection__arrow {
background:0 0;
border:none
}
.select2-container--classic.select2-container--open .select2-selection--single .select2-selection__arrow b {
border-color:transparent transparent #888;
border-width:0 4px 5px
}
.select2-container--classic.select2-container--open.select2-container--above .select2-selection--single {
border-top:none;
border-top-left-radius:0;
border-top-right-radius:0;
background-image:-webkit-linear-gradient(top,#fff 0,#eee 50%);
background-image:-o-linear-gradient(top,#fff 0,#eee 50%);
background-image:linear-gradient(to bottom,#fff 0,#eee 50%);
background-repeat:repeat-x;
filter:progid:DXImageTransform.Microsoft.gradient(startColorstr='#FFFFFFFF', endColorstr='#FFEEEEEE', GradientType=0)
}
.select2-container--classic.select2-container--open.select2-container--below .select2-selection--single {
border-bottom:none;
border-bottom-left-radius:0;
border-bottom-right-radius:0;
background-image:-webkit-linear-gradient(top,#eee 50%,#fff 100%);
background-image:-o-linear-gradient(top,#eee 50%,#fff 100%);
background-image:linear-gradient(to bottom,#eee 50%,#fff 100%);
background-repeat:repeat-x;
filter:progid:DXImageTransform.Microsoft.gradient(startColorstr='#FFEEEEEE', endColorstr='#FFFFFFFF', GradientType=0)
}
.select2-container--classic .select2-selection--multiple {
background-color:#fff;
border:1px solid #aaa;
border-radius:4px;
cursor:text;
outline:0
}
.select2-container--classic .select2-selection--multiple:focus {
border:1px solid #5897fb
}
.select2-container--classic .select2-selection--multiple .select2-selection__rendered {
list-style:none;
margin:0;
padding:0 5px
}
.select2-container--classic .select2-selection--multiple .select2-selection__clear {
display:none
}
.select2-container--classic .select2-selection--multiple .select2-selection__choice {
background-color:#e4e4e4;
border:1px solid #aaa;
border-radius:4px;
cursor:default;
float:left;
margin-right:5px;
margin-top:5px;
padding:0 5px
}
.select2-container--classic .select2-selection--multiple .select2-selection__choice__remove {
color:#888;
cursor:pointer;
display:inline-block;
font-weight:700;
margin-right:2px
}
.select2-container--classic .select2-selection--multiple .select2-selection__choice__remove:hover {
color:#555
}
.select2-container--classic[dir=rtl] .select2-selection--multiple .select2-selection__choice {
float:right;
margin-left:5px;
margin-right:auto
}
.select2-container--classic[dir=rtl] .select2-selection--multiple .select2-selection__choice__remove {
margin-left:2px;
margin-right:auto
}
.select2-container--classic.select2-container--open .select2-selection--multiple {
border:1px solid #5897fb
}
.select2-container--classic.select2-container--open.select2-container--above .select2-selection--multiple {
border-top:none;
border-top-left-radius:0;
border-top-right-radius:0
}
.select2-container--classic.select2-container--open.select2-container--below .select2-selection--multiple {
border-bottom:none;
border-bottom-left-radius:0;
border-bottom-right-radius:0
}
.select2-container--classic .select2-search--dropdown .select2-search__field {
border:1px solid #aaa;
outline:0
}
.select2-container--classic .select2-search--inline .select2-search__field {
outline:0;
box-shadow:none
}
.select2-container--classic .select2-dropdown {
background-color:#fff;
border:1px solid transparent
}
.select2-container--classic .select2-dropdown--above {
border-bottom:none
}
.select2-container--classic .select2-dropdown--below {
border-top:none
}
.select2-container--classic .select2-results__option[role=group] {
padding:0
}
.select2-container--classic .select2-results__option[aria-disabled=true] {
color:grey
}
.select2-container--classic .select2-results__option--highlighted[aria-selected] {
background-color:#3875d7;
color:#fff
}
.select2-container--classic .select2-results__group {
cursor:default;
display:block;
padding:6px
}
.select2-container--classic.select2-container--open .select2-dropdown {
border-color:#5897fb
}
Let’s say I wanted to override something in the first block of this CSS, which is this:
.select2-container {
box-sizing:border-box;
display:inline-block;
margin:0;
position:relative;
vertical-align:middle
}
Let’s change the margin to 5px:
.searchandfilter .select2-container {
margin: 5px;
}
See how I added .searchandfilter
to it? That makes my new CSS more specific. Of course, you have to place such code in to your theme, the theme customizer or a plugin like Simple Custom CSS.