mastodon/app/javascript/styles/mastodon/components.scss

.app-body {
  -webkit-overflow-scrolling: touch;
  -ms-overflow-style: -ms-autohiding-scrollbar;
}

.button {
  background-color: $ui-highlight-color;
  border: 10px none;
  border-radius: 4px;
  box-sizing: border-box;
  color: $primary-text-color;
  cursor: pointer;
  display: inline-block;
  font-family: inherit;
  font-size: 14px;
  font-weight: 500;
  height: 36px;
  letter-spacing: 0;
  line-height: 36px;
  overflow: hidden;
  padding: 0 16px;
  position: relative;
  text-align: center;
  text-transform: uppercase;
  text-decoration: none;
  text-overflow: ellipsis;
  transition: all 100ms ease-in;
  white-space: nowrap;
  width: auto;

  &:active,
  &:focus,
  &:hover {
    background-color: lighten($ui-highlight-color, 10%);
    transition: all 200ms ease-out;
  }

  &--destructive {
    transition: none;

    &:active,
    &:focus,
    &:hover {
      background-color: $error-red;
      transition: none;
    }
  }

  &:disabled,
  &.disabled {
    background-color: $ui-primary-color;
    cursor: default;
  }

  &::-moz-focus-inner {
    border: 0;
  }

  &::-moz-focus-inner,
  &:focus,
  &:active {
    outline: 0 !important;
  }

  &.button-primary,
  &.button-alternative,
  &.button-secondary,
  &.button-alternative-2 {
    font-size: 16px;
    line-height: 36px;
    height: auto;
    text-transform: none;
    padding: 4px 16px;
  }

  &.button-alternative {
    color: $inverted-text-color;
    background: $ui-primary-color;

    &:active,
    &:focus,
    &:hover {
      background-color: lighten($ui-primary-color, 4%);
    }
  }

  &.button-alternative-2 {
    background: $ui-base-lighter-color;

    &:active,
    &:focus,
    &:hover {
      background-color: lighten($ui-base-lighter-color, 4%);
    }
  }

  &.button-secondary {
    color: $darker-text-color;
    background: transparent;
    padding: 3px 15px;
    border: 1px solid $ui-primary-color;

    &:active,
    &:focus,
    &:hover {
      border-color: lighten($ui-primary-color, 4%);
      color: lighten($darker-text-color, 4%);
    }

    &:disabled {
      opacity: 0.5;
    }
  }

  &.button--block {
    display: block;
    width: 100%;
  }
}

.column__wrapper {
  display: flex;
  flex: 1 1 auto;
  position: relative;
}

.icon-button {
  display: inline-block;
  padding: 0;
  color: $action-button-color;
  border: 0;
  background: transparent;
  cursor: pointer;
  transition: color 100ms ease-in;

  &:hover,
  &:active,
  &:focus {
    color: lighten($action-button-color, 7%);
    transition: color 200ms ease-out;
  }

  &.disabled {
    color: darken($action-button-color, 13%);
    cursor: default;
  }

  &.active {
    color: $highlight-text-color;
  }

  &::-moz-focus-inner {
    border: 0;
  }

  &::-moz-focus-inner,
  &:focus,
  &:active {
    outline: 0 !important;
  }

  &.inverted {
    color: $lighter-text-color;

    &:hover,
    &:active,
    &:focus {
      color: darken($lighter-text-color, 7%);
    }

    &.disabled {
      color: lighten($lighter-text-color, 7%);
    }

    &.active {
      color: $highlight-text-color;

      &.disabled {
        color: lighten($highlight-text-color, 13%);
      }
    }
  }

  &.overlayed {
    box-sizing: content-box;
    background: rgba($base-overlay-background, 0.6);
    color: rgba($primary-text-color, 0.7);
    border-radius: 4px;
    padding: 2px;

    &:hover {
      background: rgba($base-overlay-background, 0.9);
    }
  }
}

.text-icon-button {
  color: $lighter-text-color;
  border: 0;
  background: transparent;
  cursor: pointer;
  font-weight: 600;
  font-size: 11px;
  padding: 0 3px;
  line-height: 27px;
  outline: 0;
  transition: color 100ms ease-in;

  &:hover,
  &:active,
  &:focus {
    color: darken($lighter-text-color, 7%);
    transition: color 200ms ease-out;
  }

  &.disabled {
    color: lighten($lighter-text-color, 20%);
    cursor: default;
  }

  &.active {
    color: $highlight-text-color;
  }

  &::-moz-focus-inner {
    border: 0;
  }

  &::-moz-focus-inner,
  &:focus,
  &:active {
    outline: 0 !important;
  }
}

.dropdown-menu {
  position: absolute;
}

.invisible {
  font-size: 0;
  line-height: 0;
  display: inline-block;
  width: 0;
  height: 0;
  position: absolute;

  img,
  svg {
    margin: 0 !important;
    border: 0 !important;
    padding: 0 !important;
    width: 0 !important;
    height: 0 !important;
  }
}

.ellipsis {
  &::after {
    content: "…";
  }
}

.compose-form {
  padding: 10px;

  &__sensitive-button {
    padding: 10px;
    padding-top: 0;

    font-size: 14px;
    font-weight: 500;

    &.active {
      color: $highlight-text-color;
    }

    input[type=checkbox] {
      display: none;
    }

    .checkbox {
      display: inline-block;
      position: relative;
      border: 1px solid $ui-primary-color;
      box-sizing: border-box;
      width: 18px;
      height: 18px;
      flex: 0 0 auto;
      margin-right: 10px;
      top: -1px;
      border-radius: 4px;
      vertical-align: middle;

      &.active {
        border-color: $highlight-text-color;
        background: $highlight-text-color;
      }
    }
  }

  .compose-form__warning {
    color: $inverted-text-color;
    margin-bottom: 10px;
    background: $ui-primary-color;
    box-shadow: 0 2px 6px rgba($base-shadow-color, 0.3);
    padding: 8px 10px;
    border-radius: 4px;
    font-size: 13px;
    font-weight: 400;

    strong {
      color: $inverted-text-color;
      font-weight: 500;

      @each $lang in $cjk-langs {
        &:lang(#{$lang}) {
          font-weight: 700;
        }
      }
    }

    a {
      color: $lighter-text-color;
      font-weight: 500;
      text-decoration: underline;

      &:hover,
      &:active,
      &:focus {
        text-decoration: none;
      }
    }
  }

  .emoji-picker-dropdown {
    position: absolute;
    top: 5px;
    right: 5px;
    z-index: 1;
  }

  .compose-form__autosuggest-wrapper {
    position: relative;
  }

  .autosuggest-textarea,
  .autosuggest-input,
  .spoiler-input {
    position: relative;
  }

  .spoiler-input {
    height: 0;
    transform-origin: bottom;
    opacity: 0;

    &.spoiler-input--visible {
      height: 36px;
      margin-bottom: 11px;
      opacity: 1;
    }
  }

  .autosuggest-textarea__textarea,
  .spoiler-input__input {
    display: block;
    box-sizing: border-box;
    width: 100%;
    margin: 0;
    color: $inverted-text-color;
    background: $simple-background-color;
    padding: 10px;
    font-family: inherit;
    font-size: 14px;
    resize: vertical;
    border: 0;
    outline: 0;

    &:focus {
      outline: 0;
    }

    @media screen and (max-width: 600px) {
      font-size: 16px;
    }
  }

  .spoiler-input__input {
    border-radius: 4px;
  }

  .autosuggest-textarea__textarea {
    min-height: 100px;
    border-radius: 4px 4px 0 0;
    padding-bottom: 0;
    padding-right: 10px + 22px;
    resize: none;
    scrollbar-color: initial;

    &::-webkit-scrollbar {
      all: unset;
    }

    @media screen and (max-width: 600px) {
      height: 100px !important; // prevent auto-resize textarea
      resize: vertical;
    }
  }

  .autosuggest-textarea__suggestions-wrapper {
    position: relative;
    height: 0;
  }

  .emoji-picker-wrapper {
    position: relative;
    height: 0;

    &.emoji-picker-wrapper--hidden {
      display: none;
    }
  }

  .autosuggest-textarea__suggestions {
    box-sizing: border-box;
    display: none;
    position: absolute;
    top: 100%;
    width: 100%;
    z-index: 99;
    box-shadow: 4px 4px 6px rgba($base-shadow-color, 0.4);
    background: $ui-secondary-color;
    border-radius: 0 0 4px 4px;
    color: $inverted-text-color;
    font-size: 14px;
    padding: 6px;

    &.autosuggest-textarea__suggestions--visible {
      display: block;
    }
  }

  .autosuggest-textarea__suggestions__item {
    padding: 10px;
    cursor: pointer;
    border-radius: 4px;

    &:hover,
    &:focus,
    &:active,
    &.selected {
      background: darken($ui-secondary-color, 10%);
    }
  }

  .autosuggest-account,
  .autosuggest-emoji {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: flex-start;
    line-height: 18px;
    font-size: 14px;
  }

  .autosuggest-account-icon,
  .autosuggest-emoji img {
    display: block;
    margin-right: 8px;
    width: 16px;
    height: 16px;
  }

  .autosuggest-account .display-name__account {
    color: $lighter-text-color;
  }

  .compose-form__modifiers {
    color: $inverted-text-color;
    font-family: inherit;
    font-size: 14px;
    background: $simple-background-color;

    .compose-form__upload-wrapper {
      overflow: hidden;
    }

    .compose-form__uploads-wrapper {
      display: flex;
      flex-direction: row;
      padding: 5px;
      flex-wrap: wrap;
    }

    .compose-form__upload {
      flex: 1 1 0;
      min-width: 40%;
      margin: 5px;

      &__actions {
        background: linear-gradient(180deg, rgba($base-shadow-color, 0.8) 0, rgba($base-shadow-color, 0.35) 80%, transparent);
        display: flex;
        align-items: flex-start;
        justify-content: space-between;
        opacity: 0;
        transition: opacity .1s ease;

        .icon-button {
          flex: 0 1 auto;
          color: $secondary-text-color;
          font-size: 14px;
          font-weight: 500;
          padding: 10px;
          font-family: inherit;

          &:hover,
          &:focus,
          &:active {
            color: lighten($secondary-text-color, 7%);
          }
        }

        &.active {
          opacity: 1;
        }
      }

      &-description {
        position: absolute;
        z-index: 2;
        bottom: 0;
        left: 0;
        right: 0;
        box-sizing: border-box;
        background: linear-gradient(0deg, rgba($base-shadow-color, 0.8) 0, rgba($base-shadow-color, 0.35) 80%, transparent);
        padding: 10px;
        opacity: 0;
        transition: opacity .1s ease;

        textarea {
          background: transparent;
          color: $secondary-text-color;
          border: 0;
          padding: 0;
          margin: 0;
          width: 100%;
          font-family: inherit;
          font-size: 14px;
          font-weight: 500;

          &:focus {
            color: $white;
          }

          &::placeholder {
            opacity: 0.75;
            color: $secondary-text-color;
          }
        }

        &.active {
          opacity: 1;
        }
      }
    }

    .compose-form__upload-thumbnail {
      border-radius: 4px;
      background-position: center;
      background-size: cover;
      background-repeat: no-repeat;
      height: 140px;
      width: 100%;
      overflow: hidden;
    }
  }

  .compose-form__buttons-wrapper {
    padding: 10px;
    background: darken($simple-background-color, 8%);
    border-radius: 0 0 4px 4px;
    display: flex;
    justify-content: space-between;
    flex: 0 0 auto;

    .compose-form__buttons {
      display: flex;

      .compose-form__upload-button-icon {
        line-height: 27px;
      }

      .compose-form__sensitive-button {
        display: none;

        &.compose-form__sensitive-button--visible {
          display: block;
        }

        .compose-form__sensitive-button__icon {
          line-height: 27px;
        }
      }
    }

    .icon-button {
      box-sizing: content-box;
      padding: 0 3px;
    }

    .character-counter__wrapper {
      align-self: center;
      margin-right: 4px;

      .character-counter {
        cursor: default;
        font-family: $font-sans-serif, sans-serif;
        font-size: 14px;
        font-weight: 600;
        color: $lighter-text-color;

        &.character-counter--over {
          color: $warning-red;
        }
      }
    }
  }

  .compose-form__publish {
    display: flex;
    justify-content: flex-end;
    min-width: 0;
    flex: 0 0 auto;

    .compose-form__publish-button-wrapper {
      overflow: hidden;
      padding-top: 10px;
    }
  }
}

.no-reduce-motion .spoiler-input {
  transition: height 0.4s ease, opacity 0.4s ease;
}

.emojione {
  font-size: inherit;
  vertical-align: middle;
  object-fit: contain;
  margin: -.2ex .15em .2ex;
  width: 16px;
  height: 16px;

  img {
    width: auto;
  }
}

.reply-indicator {
  border-radius: 4px;
  margin-bottom: 10px;
  background: $ui-primary-color;
  padding: 10px;
  min-height: 23px;
  overflow-y: auto;
  flex: 0 2 auto;
}

.reply-indicator__header {
  margin-bottom: 5px;
  overflow: hidden;
}

.reply-indicator__cancel {
  float: right;
  line-height: 24px;
}

.reply-indicator__display-name {
  color: $inverted-text-color;
  display: block;
  max-width: 100%;
  line-height: 24px;
  overflow: hidden;
  padding-right: 25px;
  text-decoration: none;
}

.reply-indicator__display-avatar {
  float: left;
  margin-right: 5px;
}

.status__content--with-action {
  cursor: pointer;
}

.status__content,
.reply-indicator__content {
  position: relative;
  font-size: 15px;
  line-height: 20px;
  word-wrap: break-word;
  font-weight: 400;
  overflow: hidden;
  text-overflow: ellipsis;
  padding-top: 2px;
  color: $primary-text-color;

  &:focus {
    outline: 0;
  }

  &.status__content--with-spoiler {
    white-space: normal;

    .status__content__text {
      white-space: pre-wrap;
    }
  }

  .emojione {
    width: 20px;
    height: 20px;
    margin: -3px 0 0;
  }

  p {
    margin-bottom: 20px;
    white-space: pre-wrap;

    &:last-child {
      margin-bottom: 2px;
    }
  }

  a {