mastodon/app/javascript/styles/mastodon/forms.scss

$no-columns-breakpoint: 600px;

code {
  font-family: $font-monospace, monospace;
  font-weight: 400;
}

.form-container {
  max-width: 400px;
  padding: 20px;
  margin: 0 auto;
}

.simple_form {
  .input {
    margin-bottom: 15px;
    overflow: hidden;

    &.hidden {
      margin: 0;
    }

    &.radio_buttons {
      .radio {
        margin-bottom: 15px;

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

      .radio > label {
        position: relative;
        padding-left: 28px;

        input {
          position: absolute;
          top: -2px;
          left: 0;
        }
      }
    }

    &.boolean {
      position: relative;
      margin-bottom: 0;

      .label_input > label {
        font-family: inherit;
        font-size: 14px;
        padding-top: 5px;
        color: $primary-text-color;
        display: block;
        width: auto;
      }

      .label_input,
      .hint {
        padding-left: 28px;
      }

      .label_input__wrapper {
        position: static;
      }

      label.checkbox {
        position: absolute;
        top: 2px;
        left: 0;
      }

      label a {
        color: $highlight-text-color;
        text-decoration: underline;

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

  .row {
    display: flex;
    margin: 0 -5px;

    .input {
      box-sizing: border-box;
      flex: 1 1 auto;
      width: 50%;
      padding: 0 5px;
    }
  }

  .hint {
    color: $darker-text-color;

    a {
      color: $highlight-text-color;
    }

    code {
      border-radius: 3px;
      padding: 0.2em 0.4em;
      background: darken($ui-base-color, 12%);
    }
  }

  span.hint {
    display: block;
    font-size: 12px;
    margin-top: 4px;
  }

  p.hint {
    margin-bottom: 15px;
    color: $darker-text-color;

    &.subtle-hint {
      text-align: center;
      font-size: 12px;
      line-height: 18px;
      margin-top: 15px;
      margin-bottom: 0;
    }
  }

  .card {
    margin-bottom: 15px;
  }

  strong {
    font-weight: 500;

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

  .input.with_floating_label {
    .label_input {
      display: flex;

      & > label {
        font-family: inherit;
        font-size: 14px;
        color: $primary-text-color;
        font-weight: 500;
        min-width: 150px;
        flex: 0 0 auto;
      }

      input,
      select {
        flex: 1 1 auto;
      }
    }

    &.select .hint {
      margin-top: 6px;
      margin-left: 150px;
    }
  }

  .input.with_label {
    .label_input > label {
      font-family: inherit;
      font-size: 14px;
      color: $primary-text-color;
      display: block;
      margin-bottom: 8px;
      word-wrap: break-word;
      font-weight: 500;
    }

    .hint {
      margin-top: 6px;
    }

    ul {
      flex: 390px;
    }
  }

  .input.with_block_label {
    max-width: none;

    & > label {
      font-family: inherit;
      font-size: 16px;
      color: $primary-text-color;
      display: block;
      font-weight: 500;
      padding-top: 5px;
    }

    .hint {
      margin-bottom: 15px;
    }

    ul {
      columns: 2;
    }
  }

  .required abbr {
    text-decoration: none;
    color: lighten($error-value-color, 12%);
  }

  .fields-group {
    margin-bottom: 25px;

    .input:last-child {
      margin-bottom: 0;
    }
  }

  .fields-row {
    display: flex;
    margin: 0 -10px;
    padding-top: 5px;
    margin-bottom: 25px;

    .input {
      max-width: none;
    }

    &__column {
      box-sizing: border-box;
      padding: 0 10px;
      flex: 1 1 auto;
      min-height: 1px;

      &-6 {
        max-width: 50%;
      }
    }

    .fields-group:last-child,
    .fields-row__column.fields-group {
      margin-bottom: 0;
    }

    @media screen and (max-width: $no-columns-breakpoint) {
      display: block;
      margin-bottom: 0;

      &__column {
        max-width: none;
      }

      .fields-group:last-child,
      .fields-row__column.fields-group,
      .fields-row__column {
        margin-bottom: 25px;
      }
    }
  }

  .input.radio_buttons .radio label {
    margin-bottom: 5px;
    font-family: inherit;
    font-size: 14px;
    color: $primary-text-color;
    display: block;
    width: auto;
  }

  .check_boxes {
    .checkbox {
      label {
        font-family: inherit;
        font-size: 14px;
        color: $primary-text-color;
        display: inline-block;
        width: auto;
        position: relative;
        padding-top: 5px;
        padding-left: 25px;
        flex: 1 1 auto;
      }

      input[type=checkbox] {
        position: absolute;
        left: 0;
        top: 5px;
        margin: 0;
      }
    }
  }

  input[type=text],
  input[type=number],
  input[type=email],
  input[type=password],
  textarea {
    box-sizing: border-box;
    font-size: 16px;
    color: $primary-text-color;
    display: block;
    width: 100%;
    outline: 0;
    font-family: inherit;
    resize: vertical;
    background: darken($ui-base-color, 10%);
    border: 1px solid darken($ui-base-color, 14%);
    border-radius: 4px;
    padding: 10px;

    &:invalid {
      box-shadow: none;
    }

    &:focus:invalid:not(:placeholder-shown) {
      border-color: lighten($error-red, 12%);
    }

    &:required:valid {
      border-color: $valid-value-color;
    }

    &:hover {
      border-color: darken($ui-base-color, 20%);
    }

    &:active,
    &:focus {
      border-color: $highlight-text-color;
      background: darken($ui-base-color, 8%);
    }
  }

  .input.field_with_errors {
    label {
      color: lighten($error-red, 12%);
    }

    input[type=text],
    input[type=number],
    input[type=email],
    input[type=password],
    textarea,
    select {
      border-color: lighten($error-red, 12%);
    }

    .error {
      display: block;
      font-weight: 500;
      color: lighten($error-red, 12%);
      margin-top: 4px;
    }
  }

  .input.disabled {
    opacity: 0.5;
  }

  .actions {
    margin-top: 30px;
    display: flex;

    &.actions--top {
      margin-top: 0;
      margin-bottom: 30px;
    }
  }

  button,
  .button,
  .block-button {
    display: block;
    width: 100%;
    border: 0;
    border-radius: 4px;
    background: $ui-highlight-color;
    color: $primary-text-color;
    font-size: 18px;
    line-height: inherit;
    height: auto;
    padding: 10px;
    text-transform: uppercase;
    text-decoration: none;
    text-align: center;
    box-sizing: border-box;
    cursor: pointer;
    font-weight: 500;
    outline: 0;
    margin-bottom: 10px;
    margin-right: 10px;

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

    &:hover {
      background-color: lighten($ui-highlight-color, 5%);
    }

    &:active,
    &:focus {
      background-color: darken($ui-highlight-color, 5%);
    }

    &:disabled:hover {
      background-color: $ui-primary-color;
    }

    &.negative {
      background: $error-value-color;

      &:hover {
        background-color: lighten($error-value-color, 5%);
      }

      &:active,
      &:focus {
        background-color: darken($error-value-color, 5%);
      }
    }
  }

  select {
    appearance: none;
    box-sizing: border-box;
    font-size: 16px;
    color: $primary-text-color;
    display: block;
    width: 100%;
    outline: 0;
    font-family: inherit;
    resize: vertical;
    background: darken($ui-base-color, 10%) url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 14.933 18.467' height='19.698' width='15.929'><path d='M3.467 14.967l-3.393-3.5H14.86l-3.392 3.5c-1.866 1.925-3.666 3.5-4 3.5-.335 0-2.135-1.575-4-3.5zm.266-11.234L7.467 0 11.2 3.733l3.733 3.734H0l3.733-3.734z' fill='#{hex-color(lighten($ui-base-color, 12%))}'/></svg>") no-repeat right 8px center / auto 16px;
    border: 1px solid darken($ui-base-color, 14%);
    border-radius: 4px;
    padding-left: 10px;
    padding-right: 30px;
    height: 41px;
  }

  .label_input {
    &__wrapper {
      position: relative;
    }

    &__append {
      position: absolute;
      right: 3px;
      top: 1px;
      padding: 10px;
      padding-bottom: 9px;
      font-size: 16px;
      color: $dark-text-color;
      font-family: inherit;
      pointer-events: none;
      cursor: default;
      max-width: 140px;
      white-space: nowrap;
      overflow: hidden;

      &::after {
        content: '';
        display: block;
        position: absolute;
        top: 0;
        right: 0;
        bottom: 1px;
        width: 5px;
        background-image: linear-gradient(to right, rgba(darken($ui-base-color, 10%), 0), darken($ui-base-color, 10%));
      }
    }
  }

  &__overlay-area {
    position: relative;

    &__overlay {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      display: flex;
      justify-content: center;
      align-items: center;
      background: rgba($ui-base-color, 0.65);
      backdrop-filter: blur(2px);
      border-radius: 4px;

      &__content {
        text-align: center;

        &.rich-formatting {
          &,
          p {
            color: $primary-text-color;
          }
        }
      }
    }
  }
}

.block-icon {
  display: block;
  margin: 0 auto;
  margin-bottom: 10px;
  font-size: 24px;
}

.flash-message {
  background: lighten($ui-base-color, 8%);
  color: $darker-text-color;
  border-radius: 4px;
  padding: 15px 10px;
  margin-bottom: 30px;
  text-align: center;

  &.notice {
    border: 1px solid rgba($valid-value-color, 0.5);
    background: rgba($valid-value-color, 0.25);
    color: $valid-value-color;
  }

  &.alert {
    border: 1px solid rgba($error-value-color, 0.5);
    background: rgba($error-value-color, 0.25);
    color: $error-value-color;
  }

  a {
    display: inline-block;
    color: $darker-text-color;
    text-decoration: none;

    &:hover {
      color: $primary-text-color;
      text-decoration: underline;
    }
  }

  p {
    margin-bottom: 15px;
  }

  .oauth-code {
    outline: 0;
    box-sizing: border-box;
    display: block;
    width: 100%;
    border: 0;
    padding: 10px;
    font-family: $font-monospace, monospace;
    background: $ui-base-color;
    color: $primary-text-color;
    font-size: 14px;
    margin: 0;

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

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

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

  strong {
    font-weight: 500;

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

  @media screen and (max-width: 740px) and (min-width: 441px) {
    margin-top: 40px;
  }
}

.form-footer {
  margin-top: 30px;
  text-align: center;

  a {
    color: $darker-text-color;
    text-decoration: none;

    &:hover {
      text-decoration: underline;
    }
  }
}

.quick-nav {
  list-style: none;
  margin-bottom: 25px;
  font-size: 14px;

  li {
    display: inline-block;
    margin-right: 10px;
  }

  a {
    color: $highlight-text-color;
    text-transform: uppercase;
    text-decoration: none;
    font-weight: 700;

    &:hover,
    &:focus,
    &:active {
      color: lighten($highlight-text-color, 8%);
    }
  }
}

.oauth-prompt,
.follow-prompt {
  margin-bottom: 30px;
  color: $darker-text-color;

  h2 {
    font-size: 16px;
    margin-bottom: 30px;
    text-align: center;
  }

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

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

  @media screen and (max-width: 740px) and (min-width: 441px) {
    margin-top: 40px;
  }
}

.qr-wrapper {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
}

.qr-code {
  flex: 0 0 auto;
  background: $simple-background-color;
  padding: 4px;
  margin: 0 10px 20px 0;
  box-shadow: 0 0 15px rgba($base-shadow-color, 0.2);
  display: inline-block;

  svg {
    display: block;
    margin: 0;
  }
}

.qr-alternative {
  margin-bottom: 20px;
  color: $secondary-text-color;
  flex: 150px;

  samp {
    display: block;
    font-size: 14px;
  }
}

.table-form {
  p {
    margin-bottom: 15px;

    strong {
      font-weight: 500;

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

.simple_form,
.table-form {
  .warning {
    box-sizing: border-box;
    background: rgba($error-value-color, 0.5);
    color: $primary-text-color;
    text-shadow: 1px 1px 0 rgba($base-shadow-color, 0.3);
    box-shadow: 0 2px 6px rgba($base-shadow-color, 0.4);
    border-radius: 4px;
    padding: 10px;
    margin-bottom: 15px;

    a {
      color: $primary-text-color;
      text-decoration: underline;

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

    strong {
      font-weight: 600;
      display: block;
      margin-bottom: 5px;

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

      .fa {
        font-weight: 400;
      }
    }
  }
}

.action-pagination {
  display: flex;
  flex-wrap: wrap;
  align-items: center;

  .actions,
  .pagination {
    flex: 1 1 auto;
  }

  .actions {
    padding: 30px 0;
    padding-right: 20px;
    flex: 0 0 auto;
  }
}

.post-follow-actions {
  text-align: center;
  color: $darker-text-color;

  div {
    margin-bottom: 4px;
  }
}

.alternative-login {
  margin-top: 20px;
  margin-bottom: 20px;

  h4 {
    font-size: 16px;
    color: $primary-text-color;
    text-align: center;
    margin-bottom: 20px;
    border: 0;
    padding: 0;
  }

  .button {
    display: block;
  }
}

.scope-danger {
  color: $warning-red;
}

.form_admin_settings_site_short_description,
.form_admin_settings_site_description,
.form_admin_settings_site_extended_description,
.form_admin_settings_site_terms,
.form_admin_settings_custom_css,
.form_admin_settings_closed_registrations_message {
  textarea {
    font-family: $font-monospace, monospace;
  }
}

.input-copy {
  background: darken($ui-base-color, 10%);
  border: 1px solid darken($ui-base-color, 14%);
  border-radius: 4px;
  display: flex;
  align-items: center;
  padding-right: 4px;
  position: relative;
  top: 1px;
  transition: border-color 300ms linear;

  &__wrapper {
    flex: 1 1 auto;
  }

  input[type=text] {
    background: transparent;
    border: 0;
    padding: 10px;
    font-size: 14px;
    font-family: $font-monospace, monospace;
  }

  button {
    flex: 0 0 auto;
    margin: 4px;
    text-transform: none;
    font-weight: 400;
    font-size: 14px;
    padding: 7px 18px;
    padding-bottom: 6px;
    width: auto;
    transition: background 300ms linear;
  }

  &.copied {
    border-color: $valid-value-color;
    transition: none;

    button {
      background: $valid-value-color;
      transition: none;
    }
  }
}

.connection-prompt {
  margin-bottom: 25px;

  .fa-link {
    background-color: darken($ui-base-color, 4%);
    border-radius: 100%;
    font-size: 24px;
    padding: 10px;
  }

  &__column {
    align-items: center;
    display: flex;
    flex: 1;
    flex-direction: column;
    flex-shrink: 1;
    max-width: 50%;

    &-sep {
      align-self: center;
      flex-grow: 0;
      overflow: visible;
      position: relative;
      z-index: 1;
    }

    p {
      word-break: break-word;
    }
  }

  .account__avatar {
    margin-bottom: 20px;
  }

  &__connection {
    background-color: lighten($ui-base-color, 8%);
    box-shadow: 0 0 15px rgba($base-shadow-color, 0.2);
    border-radius: 4px;
    padding: 25px 10px;
    position: relative;
    text-align: center;

    &::after {
      background-color: darken($ui-base-color, 4%);
      content: '';
      display: block;
      height: 100%;
      left: 50%;
      position: absolute;
      top: 0;
      width: 1px;
    }
  }

  &__row {
    align-items: flex-start;
    display: flex;
    flex-direction: row;
  }
}