/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

*,
*::before,
*::after {
  box-sizing: border-box;
}

:root {
  --AT-viewport-padding: 24px;
  --AT-page-padding-block-start: 80px;
  --AT-page-padding-block-end: 32px;

  /* Provide defaults for when this page is viewed in "toolkit". */
  background-color: var(--background-color-canvas, #fff);
  color: var(--text-color, #15141a);

  /* Variables used in the page layout */
  --AT-input-padding: 16px;
  /* This is somewhat arbitrary, but works well for the current design. If the computed
     header height changes, this will need to be adjusted. */
  --AT-header-height: 156px;

  --AT-section-height: calc(clamp(300px, 100vh - var(--AT-header-height), 300px) - var(--AT-viewport-padding) * 2);

  --AT-content-width: calc(var(--AT-section-height) * 4.5);
  --AT-content-max: calc(100vw - var(--AT-viewport-padding) * 2);

  --AT-square-button-large: calc(var(--size-item-large) + var(--space-small));
  --AT-square-button-small: var(--size-item-large);
  --AT-source-textarea-button-inline-padding: calc(var(--AT-square-button-small) + var(--space-small));
  --AT-target-textarea-button-block-padding: calc(var(--AT-square-button-large) + var(--space-small));
}

body {
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  align-items: flex-start;
  visibility: hidden;
  margin: 0;
  row-gap: var(--space-xxlarge);
  padding: var(--AT-page-padding-block-start) var(--AT-viewport-padding) var(--AT-page-padding-block-end);
}

#about-translations-header {
  display: flex;
  flex-direction: column;
  width: min(var(--AT-content-width), var(--AT-content-max));
  margin: 0 auto;
  row-gap: var(--space-medium);
  align-items: flex-start;
  justify-content: flex-start;
}

#about-translations-logo-and-h1 {
  display: flex;
  align-items: center;
  justify-content: start;
  column-gap: var(--space-small);
}

#about-translations-logo {
  width: var(--icon-size-large);
  height: var(--icon-size-large);
}

#about-translations-h1 {
  margin: 0;
}

#about-translations-main-user-interface {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  gap: var(--space-medium);
  width: min(var(--AT-content-width), var(--AT-content-max));
  margin: 0 auto;
}

#about-translations-main-user-interface[hidden] {
  display: none;
}

.about-translations-select {
  --select-min-height: var(--AT-square-button-large);
}

#about-translations-swap-languages-button {
  align-self: center;

  &[type~="icon"]::part(button) {
    width: var(--AT-square-button-large);
    height: var(--AT-square-button-large);
    background-image: url("chrome://global/skin/icons/swap-horizontal-20.svg");
    background-size: 20px;
  }
}

#about-translations-clear-button[type~="icon"]::part(button) {
  width: var(--AT-square-button-small);
  height: var(--AT-square-button-small);
  background-image: url("chrome://global/skin/icons/close.svg");
  background-size: var(--size-item-small);
}

#about-translations-source-section,
#about-translations-target-section {
  position: relative;
  display: flex;
  flex-direction: column;
  width: 100%;
  min-height: var(--AT-section-height);
}

#about-translations-source-section {
  background-color: var(--background-color-box);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-medium);
  overflow: hidden;

  &:focus-within {
    outline: var(--focus-outline);
    outline-offset: -1px;
  }

  &:has(moz-button:focus, a:focus) {
    outline: none;
  }
}

#about-translations-target-section {
  background-color: var(--background-color-box);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-medium);
  overflow: hidden;

  &:focus-within {
    outline: var(--focus-outline);
    outline-offset: -1px;
  }

  &:has(moz-button:focus) {
    outline: none;
  }

  &.has-translation-error > #about-translations-target-textarea {
    visibility: hidden;
  }
}

#about-translations-translation-error-message {
  --message-bar-border-radius: 0;
  --message-bar-border-width: 0;
  padding-inline: var(--space-xsmall);
  border-block-end: var(--border-width) solid var(--border-color);
}

.about-translations-section-message {
  --message-bar-border-radius: 0;
  --message-bar-border-width: 0;
  padding-inline: var(--space-xsmall);
  border-block-end: var(--border-width) solid var(--border-color);
}

.about-translations-section-message-content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  row-gap: var(--space-large);
}

.about-translations-section-message-subtext {
  display: block;
}

.about-translations-section-message-action {
  align-self: flex-start;
}

#about-translations-translation-error-subtext {
  display: block;
}

#about-translations-translation-error-button {
  margin-block-start: var(--space-large);
}

.about-translations-textarea {
  flex: 1;
  width: 100%;
  margin: 0;
  padding: var(--AT-input-padding);
  overflow: hidden;
  resize: none;
}

#about-translations-source-textarea {
  anchor-name: --AT-source-textarea-anchor;
  border: none;
  border-radius: 0;
  background-color: transparent;
  padding-inline-start: var(--AT-input-padding);
  padding-inline-end: var(--AT-source-textarea-button-inline-padding);

  &:focus-visible {
    outline: none;
  }

  :dir(ltr) > &:dir(rtl),
  :dir(rtl) > &:dir(ltr) {
    /*
      Reverse the side that reserves space for the anchored clear button
      when locale direction differs from textarea direction.
    */
    padding-inline-start: var(--AT-source-textarea-button-inline-padding);
    padding-inline-end: var(--AT-input-padding);
  }
}

#about-translations-clear-button {
  position: absolute;
  z-index: 1;
  position-anchor: --AT-source-textarea-anchor;
  inset-block-start: calc(anchor(top) + var(--space-xsmall));
  inset-inline-end: calc(anchor(end) + var(--space-xsmall));

  &:focus-visible {
    outline: none;
  }
}

#about-translations-target-textarea {
  anchor-name: --AT-target-textarea-anchor;
  border: none;
  border-radius: 0;
  background-color: transparent;
  padding-block-end: var(--AT-target-textarea-button-block-padding);

  &:focus-visible {
    outline: none;
  }
}

#about-translations-copy-button {
  position: absolute;
  z-index: 1;
  position-anchor: --AT-target-textarea-anchor;
  inset-block-end: calc(anchor(end) + var(--space-small));
  inset-inline-start: calc(anchor(start) + var(--space-small));

  &:focus-visible {
    outline: none;
  }
}

#about-translations-copy-button::part(button) {
  padding-inline: var(--space-small);
}

#about-translations-empty-section {
  width: auto;
  height: auto;
}

@media (max-width: 1200px) {
  :root {
    --AT-page-padding-block-start: 32px;
  }

  #about-translations-main-user-interface {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    grid-template-rows: auto auto auto;
    margin: 0;
    width: 100%;
    gap: var(--space-medium);
    max-width: calc(100vw - var(--AT-viewport-padding) * 2);
  }

  #about-translations-header {
    margin: 0;
    width: 100%;
    max-width: calc(100vw - var(--AT-viewport-padding) * 2);
  }

  #about-translations-source-select {
    grid-column: 1;
    grid-row: 1;
  }
  #about-translations-swap-languages-button {
    grid-column: 2;
    grid-row: 1;
  }
  #about-translations-target-select {
    grid-column: 3;
    grid-row: 1;
  }

  #about-translations-empty-section {
    display: none;
  }

  #about-translations-source-section {
    grid-column: 1 / -1;
    grid-row: 2;
  }

  #about-translations-target-section {
    grid-column: 1 / -1;
    grid-row: 3;
  }
}
