multi.js/src/multi.css

A user-friendly replacement for select boxes with multiple attribute enabled

.multi-wrapper {
    border: 1px solid #ccc;
    border-radius: 3px;
    width: 100%;
}

.multi-wrapper .non-selected-wrapper,
.multi-wrapper .selected-wrapper {
    box-sizing: border-box;
    display: inline-block;
    height: 200px;
    overflow-y: scroll;
    padding: 10px;
    vertical-align: top;
    width: 50%;
}

.multi-wrapper .non-selected-wrapper {
    background: #fafafa;
    border-right: 1px solid #ccc;
}

.multi-wrapper .selected-wrapper {
    background: #fff;
}

.multi-wrapper .header {
    color: #4f4f4f;
    cursor: default;
    font-weight: bold;
    margin-bottom: 5px;
    padding: 5px 10px;
}

.multi-wrapper .item {
    cursor: pointer;
    display: block;
    padding: 5px 10px;
}

.multi-wrapper .item:hover {
    background: #ececec;
    border-radius: 2px;
}

.multi-wrapper .item-group {
    padding: 5px 10px;
}

.multi-wrapper .item-group .group-label {
    display: block;
    font-size: 0.875rem;
    opacity: 0.5;
    padding: 5px 0;
}

.multi-wrapper .search-input {
    border: 0;
    border-bottom: 1px solid #ccc;
    border-radius: 0;
    display: block;
    font-size: 1em;
    margin: 0;
    outline: 0;
    padding: 10px 20px;
    width: 100%;
    box-sizing: border-box;
}

.multi-wrapper .non-selected-wrapper .item.selected {
    opacity: 0.5;
}

.multi-wrapper .non-selected-wrapper .item.disabled,
.multi-wrapper .selected-wrapper .item.disabled {
    opacity: 0.5;
    text-decoration: line-through;
}

.multi-wrapper .non-selected-wrapper .item.disabled:hover,
.multi-wrapper .selected-wrapper .item.disabled:hover {
    background: inherit;
    cursor: inherit;
}