discourse/app/assets/stylesheets/common/base/modal.scss

// Modal wrappers

.modal-outer-container {
  width: 100%;
  height: 100%;
}

.modal-middle-container {
  display: flex;
  height: 100%;
  align-items: center;
}

.modal-inner-container {
  --modal-max-width: 47em; // set in ems to scale with user font-size
  box-sizing: border-box;
  flex: 0 1 auto;
  margin: 0 auto;
  max-width: var(--modal-max-width);
  background-color: var(--secondary);
  box-shadow: shadow("modal");

  .select-kit {
    width: 220px;

    &.tag-chooser {
      width: 100%;
    }
  }
}

.modal-open {
  .popover {
    z-index: z("modal", "popover");
  }
  .tooltip {
    z-index: z("modal", "tooltip");
  }
}

.bootbox.modal {
  position: fixed;
  z-index: z("modal", "content");
  overflow: auto;
  height: auto;
  background-color: var(--secondary);
  box-shadow: shadow("card");
  background-clip: padding-box;
}

.input-hint-text {
  margin-left: 0.5em;
  color: var(--secondary-high);
}

.modal-header {
  display: flex;
  padding: 10px 15px;
  border-bottom: 1px solid var(--primary-low);
  align-items: center;

  .title {
    margin-right: 1em;

    h3 {
      margin-bottom: 0;
    }

    p {
      margin: 0;
    }
  }

  .modal-close {
    order: 2;
    margin-left: auto;

    .close {
      color: var(--primary-high);
    }
  }
}

.modal-backdrop {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: z("modal", "overlay");
  background-color: #111;
  &.fade {
    opacity: 0;
  }
}

.modal-backdrop,
.modal-backdrop.fade.in {
  animation: fade 0.3s;
  opacity: 0.9;
  filter: alpha(opacity=90);
}

// fade in
@keyframes fade {
  from {
    opacity: 0;
  }
  to {
    opacity: 0.9;
  }
}

.inline-modal {
  .modal-inner-container {
    border: 1px solid var(--secondary-medium);
  }
}

.fixed-modal {
  position: fixed;
  top: 0;
  width: 100%;
  height: 100%;
  z-index: z("modal", "content");
  overflow: auto;

  html.keyboard-visible body.ios-safari-composer-hacks & {
    height: calc(var(--composer-vh, 1vh) * 100);
    .modal-inner-container {
      max-height: 100%;
      margin-bottom: 0px;
    }
  }

  &:not(.history-modal) {
    .modal-body:not(.reorder-categories):not(.poll-ui-builder):not(.poll-breakdown) {
      max-height: 80vh !important;
      @media screen and (max-height: 500px) {
        max-height: 65vh !important;
      }
    }
  }
}

.modal-form {
  margin-bottom: 0;
}

.modal-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  padding: 14px 15px 10px;
  border-top: 1px solid var(--primary-low);
  --btn-bottom-margin: 0.3em;
  .btn {
    margin: 0 0.75em var(--btn-bottom-margin) 0;
    &[href] {
      min-height: unset;
    }
  }

  a {
    margin-bottom: var(--btn-bottom-margin);
  }
}

.modal {
  .nav {
    padding: 10px 30px 10px 15px;
    background-color: var(--secondary);
    li > a {
      font-size: var(--font-0);
    }
    border-bottom: 1px solid var(--primary-low);
  }

  &.hidden {
    display: none;
  }

  .modal-body {
    overflow-y: auto;
    max-height: 400px;
    padding: 1em;

    &.full-height-modal {
      max-height: calc(100vh - 150px);
    }

    &.insert-link {
      overflow-y: visible;
      input {
        min-width: 300px;
      }

      .inputs {
        position: relative;
        .spinner {
          position: absolute;
          right: 8px;
          top: -15px;
          width: 10px;
          height: 10px;
        }
        .internal-link-results {
          position: absolute;
          top: 70%;
          padding: 5px 10px;
          box-shadow: shadow("card");
          z-index: 5;
          background-color: var(--secondary);
          max-height: 150px;
          width: 90%;
          overflow-y: auto;
          > .search-link {
            padding: 6px;
            border-bottom: 1px solid var(--primary-low);
            cursor: pointer;
            display: block;
            &:hover,
            &:focus {
              background-color: var(--highlight-medium);
            }
            .search-category {
              display: flex;
              align-items: center;
            }
            .discourse-tags {
              font-size: var(--font-down-1);
            }
          }
        }
      }
    }
    textarea {
      width: 100%;
      height: 80px;
      box-sizing: border-box;
    }
    p {
      font-size: var(--font-0);
    }
    .archetype-option {
      margin-bottom: 20px;
    }
    .warning {
      color: var(--danger) !important;
    }
  }

  .password-confirmation {
    display: none;
  }

  section.field {
    padding: 0.25em 0;
    margin-bottom: 5px;
    &.with-items {
      display: flex;
      align-items: flex-start;
    }
    .field-item {
      display: inline-block;
      margin-right: 10px;
    }
  }

  // password reset modal
  .modal-body.forgot-password-modal p {
    font-size: var(--font-0);
  }

  pre code {
    white-space: pre-wrap;
    max-width: var(--modal-max-width);
  }
}

.reply-where-modal {
  .dialog-footer {
    display: block;
  }

  .btn {
    display: block;
    text-align: left;
    margin-bottom: 0.75em;
    margin-right: 0;
    overflow: hidden;
    width: 100%;

    &:first-of-type {
      margin-top: 0.25em;
    }

    &.btn-reply-on-original,
    &.btn-reply-here {
      font-size: var(--font-up-1);
      line-height: var(--line-height-medium);
      font-weight: bold;
    }

    .topic-title {
      font-weight: normal;
    }
  }
}

.delete-user-modal {
  .modal-footer {
    .btn {
      line-height: $line-height-medium;
    }
  }
}

.admin-delete-user-posts-progress-modal {
  .progress-bar {
    height: 15px;
    position: relative;
    background: var(--primary-low-mid);
    border-radius: 25px;
    overflow: hidden;
    margin: 30px 0 20px;
    span {
      display: block;
      width: 0%;
      height: 100%;
      background-color: var(--tertiary);
      position: relative;
      transition: width 0.6s linear;
    }
  }
}

.incoming-email-modal {
  .btn {
    transition: none;
    background-color: transparent;
    margin-right: 5px;
    &:hover,
    &.active {
      color: var(--primary);
    }
    &.active {
      font-weight: bold;
    }
    &:focus {
      outline: 2px solid var(--primary-low);
    }
  }
  .incoming-email-tabs {
    margin-bottom: 15px;
  }
  .incoming-email-content {
    height: 300px;
    max-width: 100%;
    width: 90vw; // forcing textarea wider
    textarea,
    .incoming-email-html-part {
      height: 95%;
      border: none;
      border-top: 1px solid var(--primary-low);
      padding-top: 10px;
      width: 100%;
    }
    textarea {
      font-family: monospace;
      resize: none;
      border-radius: 0;
      box-shadow: none;
    }
    .incoming-email-html-part {
      width: calc(100% - 36px);
      padding: 10px 4px 4px 4px;
    }
    @media screen and (max-width: 760px) {
      .incoming-email-html-part {
        width: calc(100% - 10px);
      }
    }
  }
}

.modal .modal-body.change-timestamp {
  #date-container {
    .pika-single {
      width: 100%;
      box-sizing: border-box;
      display: flex;
      justify-content: center;
    }
  }

  form {
    display: flex;

    .date-picker-wrapper,
    input[type="time"] {
      width: 50%;
    }

    .date-picker-wrapper {
      display: flex;
      flex: 1;

      .date-picker {
        flex: 1;
      }
    }

    input.date-picker,
    input[type="time"] {
      text-align: left;
      margin: 0;
    }
  }
}

.change-timestamp {
  width: 28em; // scales with user font-size
  max-width: 90vw; // prevents overflow due to extra large user font-size
}

.change-timestamp {
  #date-container {
    .pika-single {
      position: relative !important; // overriding another important
      display: inline-block;
      margin-top: 0.5em;
    }
  }

  .date-picker-wrapper {
    min-width: 130px;
    margin-right: 0.5em;
  }

  input[type="time"] {
    width: 130px;
  }

  form {
    margin: 0;
  }
}

.flag-modal-body {
  max-height: 450px;
  .flag-action-type-details {
    width: 100%;
    max-width: 500px;
    line-height: $line-height-large;
  }
}

.flag-message {
  margin: 0;
}

.custom-message-length {
  color: var(--primary-medium);
  font-size: var(--font-down-1);
}

.jump-to-post-modal {
  .modal-inner-container {
    max-width: 350px;
  }
  .modal-body {
    overflow-y: visible;
    #post-jump {
      margin: 0;
      width: 100px;
    }

    .date-picker {
      margin: 0;
      width: 180px;
    }

    .input-hint-text {
      color: var(--primary);
    }

    .jump-to-post-control .index {
      color: var(--primary-medium);
    }

    .jump-to-date-control {
      display: flex;
      align-items: center;
      .input-hint-text {
        margin-left: 0;
        margin-right: 0.5em;
      }
    }

    .separator {
      display: flex;
      align-items: center;
      margin: 0.5em auto;

      hr {
        flex: 1 0 0px;
      }

      .text {
        margin: 0 0.5em 0 0;
        color: var(--primary-medium);
      }
    }
  }
}

// move-to topic modal
.choose-topic-modal {
  #split-topic-name,
  #choose-topic-title,
  #choose-message-title {
    width: 100%;
  }

  .category-chooser {
    margin-bottom: 9px;
    width: 100% !important;
    .category-row {
      max-width: 485px;
    }
  }

  .controls.existing-topic {
    margin-bottom: 0.75em;
  }

  // move to existing topic
  .existing-topic {
    .radio {
      flex-wrap: wrap;
    }
    .topic-title {
      max-width: 90%;
    }
    .topic-categories {
      width: 100%;
    }
  }
}

.publish-page-modal {
  .modal-body {
    p.publish-description {
      margin-top: 0;
    }
    input.publish-slug {
      width: 100%;
    }

    .publish-url {
      margin-bottom: 1em;
      .example-url,
      .invalid-slug {
        font-weight: bold;
      }
    }

    .publish-slug:disabled {
      cursor: not-allowed;
    }

    .controls {
      margin-bottom: 1em;

      .description {
        margin: 0;
        display: flex;
        align-items: center;
      }
    }
  }

  .modal-footer {
    display: flex;

    .close-publish-page {
      margin-left: auto;
      margin-right: 0;
    }
  }
}

.ignore-duration-with-username-modal {
  .future-date-input {
    margin-top: 1em;
  }
}

.modal:not(.has-tabs) {
  .modal-tab {
    position: absolute;
    width: 95%;
  }
}

.modal {
  &.has-tabs {
    .modal-tabs {
      display: inline-flex;
      flex-wrap: wrap;
      flex: 1 0 auto;
      margin: 0;

      .modal-tab {
        list-style: none;
        padding: 4px 8px;
        margin-right: 4px;
        cursor: pointer;

        &.is-active {
          color: var(--secondary);
          background: var(--danger);

          &.single-tab {
            background: none;
            color: var(--primary);
            padding: 0;
            font-size: var(--font-up-3);
            font-weight: bold;
          }
        }
      }
    }
  }
}

.topic-bulk-actions-modal {
  p {
    margin-top: 0;
  }
  &.full .modal-body {
    height: 400px;
    max-height: 400px;
  }

  .bulk-buttons {
    display: flex;
    flex-wrap: wrap;
    margin-right: -1%;

    .btn {
      flex: 1 0 30%;
      margin-bottom: 1em;
      margin-right: 1%;
      white-space: nowrap;
      overflow: hidden;
      max-width: 33%;

      @media screen and (max-width: 767px) {
        flex: 1 0 48%;
        max-width: 48%;
      }

      @include breakpoint(mobile-extra-large) {
        flex: 1 1 auto;
        min-width: 49%;
      }
    }
  }
}

.bulk-notification-list {
  margin-bottom: 1.5em;
}

.notification-level-radio {
  flex-wrap: wrap;
  align-items: baseline;
  margin-bottom: 0.5em;
  .description {
    width: 100%;
    margin-top: 0.25em;
  }
}

.modal.edit-slow-mode-modal {
  .slow-mode-label {
    display: inline-flex;
  }

  .alert.alert-info {
    margin-bottom: 0;
  }

  .input-small {
    width: 10%;
  }
}

.group-add-members-modal {
  .input-group {
    margin-bottom: 0.5em;

    &:last-child {
      margin-bottom: 0;
    }
  }

  .user-chooser {
    width: calc(100%);
  }
}

.modal-body .codeblock-buttons {
  margin: 0;

  button {
    top: 21px;
  }
}