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sousa-gecko/toolkit/components/aboutpdf/content/aboutPDF.css
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Dão Gottwald 759f86dd9e Bug 2051196 - Add a global [hidden] { display: none !important } rule instead of :not([hidden]) display guards r=desktop-theme-reviewers,emilio
`[hidden]` is implemented as a low-priority presentation attribute (see the
comment in layout/style/res/html.css), so any author rule setting `display`
silently overrides it. A lot of chrome/in-content CSS therefore guards
display-setting rules with `:not([hidden])` so the element still hides when the
`hidden` attribute is set.

Add a `:where([hidden]) { display: none !important }` rule to the two base
stylesheets -- global-shared.css (chrome) and in-content/common-shared.css
(in-content pages) -- so callers can set a `display` type unconditionally, and
drop the redundant `:not([hidden])` guards. `:where()` keeps the selector at
zero specificity, so the rare element that must stay shown can override it with
a plain `!important`: findbar[hidden] (slide transition), treecol[hidden] in
xul.css (column collapse), setting-control[hidden]:has(> moz-message-bar), and
the devtools toolbox webconsole/deck panels (kept laid out via visibility).

Guards are kept where the base rule can't reach: shadow-DOM widgets, the
newtab/activity-stream bundle, browser/fxr/*, and mixed-coverage sheets injected
into content documents or shadow roots (urlbar view sheets via the smartbar,
feature-callout sheets). Structural `:not([hidden])` uses (sibling/descendant
combinators) are untouched.

Also fix the moreFromMozilla QR-code box, which showed itself by setting
hidden="false". Since bug 1979014 made `hidden` a regular boolean attribute,
that value is actually hidden, so it now removes the attribute instead (and the
matching :not([hidden="true"]) CSS guards become a plain selector).

Differential Revision: https://phabricator.services.mozilla.com/D309290
2026-06-30 22:41:46 +00:00

195 lines
4.0 KiB
CSS

/* 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/. */
html,
body {
height: 100%;
margin: 0;
}
body {
background-color: var(--background-color-canvas);
}
#container {
display: flex;
align-items: flex-start;
justify-content: center;
min-height: 100%;
/* stylelint-disable-next-line stylelint-plugin-mozilla/use-design-tokens */
max-width: 1458px;
margin-inline: auto;
padding: var(--space-xxlarge);
box-sizing: border-box;
}
#col-left,
#col-right {
/* stylelint-disable-next-line stylelint-plugin-mozilla/use-design-tokens */
width: 154px;
flex-shrink: 0;
}
#col-mid {
flex: 1;
min-width: 0;
display: flex;
flex-direction: column;
align-items: stretch;
gap: var(--space-xlarge);
padding-inline: var(--space-xlarge);
}
#logo-lockup {
display: flex;
flex-direction: column;
gap: var(--space-small);
}
#logo-row {
display: flex;
align-items: center;
gap: var(--space-small);
h1 {
margin: 0;
}
}
#firefox-logo {
width: var(--size-item-medium);
height: var(--size-item-medium);
}
#tagline {
margin: 0;
}
#dropzone {
background-color: var(--background-color-box);
border: 2px dashed var(--focus-outline-color);
border-radius: var(--border-radius-large);
display: flex;
align-items: center;
justify-content: center;
/* stylelint-disable-next-line stylelint-plugin-mozilla/use-design-tokens */
min-height: 450px;
/* stylelint-disable-next-line stylelint-plugin-mozilla/use-design-tokens */
max-width: 1200px;
padding: var(--space-large);
box-shadow: var(--box-shadow-level-3);
cursor: pointer;
transition:
background-color 0.15s,
border-color 0.15s;
&:hover:not(.drag-over, :active) {
background-color: var(--button-background-color-hover);
}
&:active,
&.drag-over {
background-color: var(--button-background-color-active);
}
&:focus-within {
border-style: solid;
outline: 2px solid var(--focus-outline-color);
outline-offset: 2px;
}
@media (forced-colors: active) {
box-shadow: none;
background-color: var(--button-background-color);
color: var(--button-text-color);
border-color: currentColor;
/* Color transitions flash through unrelated system colors in HCM. */
transition: none;
&:hover:not(.drag-over, :active),
&:active,
&.drag-over {
background-color: var(--background-color-list-item-hover);
color: var(--text-color-accent-primary-selected);
}
&:focus-within {
outline-color: currentColor;
}
}
}
#dropzone-content {
display: flex;
flex-direction: column;
align-items: center;
gap: var(--space-small);
p {
margin: 0;
text-align: center;
}
}
#dropzone-privacy-hint {
font-size: var(--font-size-small);
color: var(--text-color-deemphasized);
padding-block-start: var(--space-small);
}
#dropzone-error {
display: inline-flex;
align-items: flex-start;
gap: var(--space-xsmall);
color: var(--text-color);
&::before {
content: "";
display: inline-block;
width: var(--size-item-small);
height: var(--size-item-small);
background: url("chrome://global/skin/icons/warning.svg") no-repeat center / contain;
-moz-context-properties: fill;
fill: var(--icon-color-warning);
flex-shrink: 0;
}
}
/* Inherit dropzone color in HCM so hover/drag-over pick up SelectedItemText. */
@media (forced-colors: active) {
#dropzone-hint,
#dropzone-privacy-hint,
#dropzone-error {
color: currentColor;
}
}
#promo-row {
display: flex;
justify-content: center;
}
#promo {
width: 100%;
/* stylelint-disable-next-line stylelint-plugin-mozilla/use-design-tokens */
max-width: 700px;
/* stylelint-disable-next-line stylelint-plugin-mozilla/use-design-tokens */
--promo-image-size: 100px;
}
@media (max-width: 760px) {
#col-left,
#col-right {
display: none;
}
#container {
padding: var(--space-xlarge);
}
#col-mid {
padding-inline: 0;
}
}