html.opera {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
}

html.opera body {
  width: auto;
}

body {
  background: #fff;
  margin: 0;
  font-family: "Helvetica Neue", Helvetica, sans-serif;
  font-size: 12px;
  min-width: 480px;
  max-width: 800px;
  width: max-content;
}

@supports (-moz-appearance:none) {
  body {
    --addons-page-left-padding: 6px;
    /* compensate 'html.firefox .block' padding-left */
    width: calc(100% - var(--addons-page-left-padding));
    /* match the default FF theme */
    background-color: #f9f9fa;
  }
  html.firefox .block {
    padding-left: var(--addons-page-left-padding);
  }
}

.firefox .chromium-only {
  display: none;
}

.block {
  display: flex;
  align-items: center;
  margin: 1em 0;
  border-bottom: 1px dotted #ccc;
  padding: 0 16px .75em;
  position: relative;
}

.block:nth-last-child(2) {
  margin-bottom: 0;
}

.block:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.collapsed, .collapsible h1 {
  cursor: pointer;
}

.collapsed .items {
  display: none;
}

h1 {
  width: 30%;
  margin: 0;
  font-size: 120%;
  font-weight: bold;
  padding-right: 8px;
  box-sizing: border-box;
  overflow-wrap: break-word;
}

.items {
  width: 70%;
}

label {
  display: flex;
  margin: .25ex 0;
  align-items: center;
}

label > :first-child {
  margin-right: 8px;
  flex-grow: 1;
}

label:not([disabled]) > :first-child {
  cursor: default;
}

label:not([disabled]):hover > :first-child {
  text-shadow: 0 0 0.01px rgba(0, 0, 0, .25);
  cursor: pointer;
}

input[type=number],
input[type="color"],
select,
.onoffswitch {
  width: 60px;
  box-sizing: border-box;
  flex-shrink: 0;
}

button {
  text-align: center;
}

input[type=number] {
  text-align: right;
}

input[type=number]:invalid {
  background-color: rgba(255, 0, 0, 0.1);
  color: darkred;
}

input[type="color"] {
  box-sizing: border-box;
  height: 2em;
}

.iconset {
  display: flex;
}

.iconset input {
  display: block;
}

.iconset input[type="radio"] {
  margin: 2px 4px 0 0;
}

#actions {
  justify-content: space-around;
  align-items: stretch;
  padding: 1em;
  white-space: nowrap;
  background-color: rgba(0, 0, 0, .05);
  margin: 0;
}

.firefox #actions,
.opera #actions {
  background-color: transparent;
}

#actions button {
  width: auto;
}

#actions button:not(:last-child) {
  margin-right: 8px;
}

[data-cmd="check-updates"] button {
  position: relative;
}

.update-in-progress [data-cmd="check-updates"] {
  opacity: .5;
  pointer-events: none;
}

.update-in-progress #update-progress {
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  background-color: currentColor;
  content: "";
  opacity: .35;
}

#updates-installed {
  position: absolute;
  font-size: 85%;
  margin-top: 1px;
}

#updates-installed::after {
  content: attr(data-value);
  margin-left: .5ex;
  font-weight: bold;
}

#updates-installed:not([data-value]),
#updates-installed[data-value=""] {
  display: none;
}

#advanced.collapsible.collapsed {
  height: 30px;
  padding: 0;
  margin: 0;
  justify-content: center;
}

html:not(.firefox):not(.opera) #updates {
  margin-bottom: 0;
}

#advanced.collapsible:not(.collapsed) {
  margin-bottom: 0;
}

#advanced.collapsible:not(.collapsed) .collapsible-resizer,
#advanced:not(.collapsible) .collapsible-resizer {
  padding-right: 8px;
  box-sizing: border-box;
  width: 30%;
}

#advanced.collapsible h1 {
  width: unset;
  padding: 0;
  color: #333;
  transition: color .5s;
  display: inline-flex;
  align-items: center;
}

#advanced:not(.collapsible) .collapsible-resizer h1 {
  width: unset;
  padding: 0;
  display: inline-flex;
}

#advanced.collapsible:not(.collapsed) h1:hover {
  color: #666;
}

#advanced.collapsible.collapsed h1 {
  padding: 0;
  color: #666;
}

#advanced.collapsible.collapsed:hover h1 {
  color: #333;
}

.collapsible-resizer .svg-icon {
  fill: #333;
  transition: fill .5s;
  height: 16px;
  width: 16px;
}

#advanced.collapsible.collapsed .collapsible-resizer .svg-icon,
#advanced.collapsible:not(.collapsed) .collapsible-resizer h1:hover .svg-icon {
  fill: #666;
}

#advanced.collapsible.collapsed:hover .collapsible-resizer .svg-icon {
  fill: #333;
}

#advanced.collapsible h1 .svg-icon {
  margin-left: 2px;
}

#advanced.collapsible.collapsed .is-expanded,
#advanced:not(.collapsible) .collapsible-resizer .svg-icon {
  display: none;
}

#advanced.collapsible:not(.collapsed) .is-collapsed {
  display: none;
}

.svg-inline-wrapper .svg-icon {
  width: 16px;
  height: 16px;
  fill: #666;
  vertical-align: sub;
}

.svg-inline-wrapper:hover .svg-icon {
  fill: #000;
}

#message-box.note > div {
  max-width: calc(100vw - 6rem);
}

.opera #message-box.note,
.firefox #message-box.note {
  background-color: transparent;
}

@keyframes fadeinout {
  0%   { opacity: 0 }
  10%  { opacity: 1 }
  25%  { opacity: 1 }
  100% { opacity: 0 }
}

@media (hover: none) {
  .expanded-note {
    font-size: 90%;
    white-space: normal;
    color: #666;
    margin-top: .5em;
    hyphens: auto;
  }
}