discourse/app/assets/stylesheets/common/base/edit-topic-timer-modal.scss

.edit-topic-timer-modal {
  .select-kit.combo-box {
    width: 100%;
  }
  .modal-footer {
    margin: 0;
    border-top: 0;
    padding: 10px 0;
  }
  .modal-inner-container {
    box-sizing: border-box;
    min-width: 310px;
  }
  .modal-body {
    max-height: none;
    width: 375px;
    box-sizing: border-box;

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

    .control-label {
      font-weight: 700;
    }
  }
  .radios {
    margin-bottom: 10px;
  }
  label {
    display: inline-flex;
    padding-right: 5px;
    align-items: center;
    input {
      margin-top: 0;
    }
  }
  .topic-timer-duration {
    width: 100%;
  }
  .btn.pull-right {
    margin-right: 10px;
  }
  .future-date-input {
    input {
      margin: 0;
    }
    .alert-info {
      margin: 0 -15px -15px -15px;
    }
    .btn-clear {
      display: none;
    }
    .topic-timer-info {
      border: none;
      padding: 0;
      h3 {
        font-weight: normal;
        font-size: $font-up-1;
      }
    }

    input[disabled] {
      background: var(--primary-low);
    }
  }
  .pika-single {
    position: absolute !important; /* inline JS styles */
  }

  .modal-topic-timer-info {
    .topic-timer-info {
      border-top: 0;
    }
  }
}

// mobile styles
.mobile-view .edit-topic-timer-modal {
  .select-kit.combo-box {
    flex: 1 0 0px;
  }
}