discourse/app/assets/stylesheets/common/components/time-input.scss

.modal-inner-container .d-time-input,
.d-time-input {
  display: inline-flex;

  .combo-box {
    width: 65px;
    min-width: auto;

    &:not(.has-selection) {
      .select-kit-selected-name .name {
        color: var(--primary-medium);
      }
    }

    .select-kit-header {
      .d-icon {
        padding-left: 0;
      }

      &:focus {
        outline: 1px solid var(--tertiary);
      }
    }

    .select-kit-collection {
      min-width: auto;
    }

    .select-kit-filter {
      width: auto;
      overflow: hidden;
      .filter-input {
        min-width: 0;
      }
    }

    .selected-name {
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
    }
  }
}