discourse-custom-wizard/assets/stylesheets/wizard/custom/autocomplete.scss

div.ac-wrap {
  overflow: visible;
  max-height: 150px;
  min-height: 34px;
  background-color: var(--secondary);
  border: 1px solid var(--primary-medium);
  padding: 5px 4px 1px 4px;

  div.item {
    float: left;
    margin-bottom: 4px;
    margin-right: 10px;

    span {
      height: 24px;
      display: inline-block;
      line-height: 20px;
    }
  }

  .ac-collapsed-button {
    float: left;
    border-radius: 20px;
    position: relative;
    top: -2px;
    margin-right: 10px;
  }

  input[type="text"] {
    border: 0;
  }
  
  .remove-link {
    margin-left: 4px;
    font-size: $font-down-1;
    line-height: $line-height-small;
    padding: 1px 3.5px;
    border-radius: 12px;
    box-sizing: border-box;
    border: 1px solid var(--primary-low);
    
    &:hover {
      background-color: var(--danger-low);
      border: 1px solid var(--danger-medium);
      text-decoration: none;
      color: var(--danger);
    }
  }
}

img.avatar {
  border-radius: 50%;
  vertical-align: middle;
}

.autocomplete {
  z-index: 999999;
  position: absolute;
  width: 240px;
  background-color: var(--secondary);
  border: 1px solid var(--primary-low);

  ul {
    list-style: none;
    padding: 0;
    margin: 0;

    li {
      .d-users {
        color: var(--primary-medium);
        padding: 0 2px;
      }

      border-bottom: 1px solid var(--primary-low);

      a {
        padding: 5px;
        display: block;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        font-size: 14px;
        text-decoration: none;

        img {
          margin-right: 5px;
        }
        
        span.username {
          color: var(--primary);
          vertical-align: middle;
        }
        span.name {
          font-size: $font-down-1;
          vertical-align: middle;
          margin-left: 5px;
          color: var(--primary);
        }
        &.selected {
          background-color: var(--tertiary);
        }
        &:hover {
          background-color: var(--highlight-low);
          text-decoration: none;
        }
      }
    }
  }
}

.ac-wrap {
  box-sizing: border-box;
  position: relative;

  .ac-loading {
    position: absolute;
    top: 7px;
    right: 5px;
  }

  .item {
    line-height: 1.6;
  }

  .autocomplete {
    width: inherit;
    left: 0 !important;
    width: 100%;
    top: 30px !important;
    box-sizing: border-box;

    li, .no-results {
      padding: 10px;
    }

    ul > label {
      margin: 5px 0;
      padding: 0 5px;
      font-size: 80%;
      line-height: 1.4em;

      a {
        text-decoration: underline;
      }
    }
  }
}

.ac-form-result {
  cursor: pointer;
  background-color: var(--secondary);
  display: flex;

  &:hover, &.selected {
    background-color: var(--tertiary);
    color: white;

    label {
      color: white;
    }
  }

  label {
    flex: 1 1 auto;
    margin-bottom: 0;
    cursor: pointer;
  }

  i {
    margin-right: 5px;
  }
}