discourse/app/assets/stylesheets/common/components/bookmark-modal.scss

.bookmark-with-reminder.modal {
  .modal-inner-container {
    box-sizing: border-box;
  }
  .modal-body {
    width: 375px;
    box-sizing: border-box;

    @media (max-width: 600px) {
      width: 100%;
    }

    .control-label {
      font-weight: 700;
    }

    .ember-text-field.bookmark-name {
      width: 100%;
    }
  }

  .existing-reminder-at-alert {
    display: flex;
    flex-direction: row;
    align-items: center;

    .d-icon {
      margin-right: 1em;
    }
  }

  .custom-date-time-wrap {
    padding: 1em 1em 0.5em;
    border: 1px solid $primary-low;
    border-top: none;
    margin-top: -0.667em;
    background: $primary-very-low;
    .d-icon {
      padding: 0 0.75em 0 0;
      color: $primary-high;
      margin-top: -0.5em;
    }

    .tap-tile-date-input,
    .tap-tile-time-input {
      display: flex;
      align-items: center;
      input {
        width: 100%;
        min-width: unset;
      }
    }

    .date-picker,
    .time-input {
      text-align: left;
      padding-top: 5px;
    }

    .time-input,
    .date-picker-wrapper {
      flex: 1 1 auto;
    }
  }
}