discourse/app/assets/stylesheets/common/base/discourse.scss

// Common
// global styles that apply to the Discourse application specifically
// BEWARE: changing these styles implies they take effect anywhere they are seen
// throughout the Discourse application

:root {
  --d-input-bg-color: var(--secondary);
  --d-input-text-color: var(--primary);
  --d-input-border: 1px solid var(--primary-400);
  --d-input-bg-color--disabled: var(--primary-low);
  --d-input-text-color--disabled: var(--primary);
  --d-input-border--disabled: 1px solid var(--primary-low);
}

// Animation Keyframes
@keyframes ping {
  0% {
    transform: scale(0.6);
    box-shadow: 0 0 0 0 rgba(var(--success-rgb), 0.7);
  }
  70% {
    transform: scale(1);
    box-shadow: 0 0 0 10px rgba(var(--success-rgb), 0);
  }
  100% {
    transform: scale(0.95);
    box-shadow: 0 0 0 0 rgba(var(--success-rgb), 0);
  }
}

@keyframes rotate-forever {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

@keyframes background-fade-highlight {
  0% {
    background-color: var(--tertiary-low);
  }
  100% {
    background-color: transparent;
  }
}

// placeholder
@keyframes placeHolderShimmer {
  0% {
    background-position: -1000px 0;
  }
  100% {
    background-position: 1100px 0;
  }
}

@media (prefers-reduced-motion: no-preference) {
  .placeholder-animation {
    animation-duration: 4s;
    animation-fill-mode: forwards;
    animation-iteration-count: infinite;
    animation-name: placeHolderShimmer;
    animation-timing-function: linear;
    background: var(--primary-very-low);
    background: linear-gradient(
      to right,
      var(--primary-very-low) 10%,
      var(--primary-low) 18%,
      var(--primary-very-low) 33%
    );
  }
}

// Base Elements
html {
  height: 100%;
}

body {
  background-attachment: fixed;
  background-size: cover;
  min-height: 100%;
  box-sizing: border-box;

  @include clearfix;
}

// setting a static limit on big and small prevents nesting abuse
big {
  font-size: var(--font-up-5);
}
small {
  font-size: var(--font-down-2);
}

blockquote {
  @include post-aside;
  clear: both;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--heading-font-family);
  margin-top: 0;
  margin-bottom: 0.5rem;
}

a.cancel {
  margin-left: 1.25em;
  line-height: normal;
  color: var(--primary-high);
  transition: color 250ms;
  &:hover {
    color: var(--danger);
  }
}

ul.breadcrumb {
  margin: 0 10px 0 10px;
}

a.no-href {
  cursor: pointer;
}

img.avatar {
  border-radius: 50%;
}

// don't wrap relative dates; we want Jul 26, '15, not: Jul
//                                                      26,
//                                                      '15
span.relative-date {
  white-space: nowrap;
}

legend {
  color: var(--primary-high);
  font-weight: bold;
}

label {
  display: flex;
  margin-bottom: 5px;
  align-items: flex-start;
  color: var(--primary-high);

  &:not(.checkbox-label) {
    font-weight: bold;
  }
  > .d-icon {
    align-self: center;
    margin-right: 4px;
  }
  a {
    // flex removes whitespace characters between text nodes and elements
    // so we need to add it back
    margin: 0 0.25em;
  }
}

input {
  &[type="radio"],
  &[type="checkbox"] {
    margin-top: 0.17em;
    margin-right: 0.43em;
    margin-left: 0.1em;
    line-height: var(--line-height-small);
    cursor: pointer;
    flex-shrink: 0; // Adding for safety, Safari will shrink checkboxes
  }
  &[type="submit"],
  &[type="reset"],
  &[type="button"],
  &[type="radio"],
  &[type="checkbox"] {
    width: auto;
  }

  &.invalid {
    background-color: var(--danger-low);
  }

  .radio &[type="radio"],
  .checkbox &[type="checkbox"] {
    float: left;
    margin-left: -18px;
  }
}

input {
  &[type="text"],
  &[type="password"],
  &[type="datetime"],
  &[type="datetime-local"],
  &[type="date"],
  &[type="month"],
  &[type="time"],
  &[type="week"],
  &[type="number"],
  &[type="email"],
  &[type="url"],
  &[type="search"],
  &[type="tel"],
  &[type="color"] {
    @include appearance-none;
    @include form-item-sizing;
    display: inline-block;
    margin-bottom: 9px;
    color: var(--d-input-text-color);
    background-color: var(--d-input-bg-color);
    border: var(--d-input-border);
    border-radius: var(--d-input-border-radius);
    &:focus {
      @include default-focus;
    }
  }

  &[type="time"] {
    max-width: 140px;
  }
}

input[type="search"] {
  &::-webkit-search-cancel-button,
  &::-webkit-search-decoration {
    -webkit-appearance: none;
    appearance: none;
  }
}

// Fixes Safari height inconsistency
::-webkit-datetime-edit {
  display: inline;
}

// Fixes Webkit inconsistencies (Safari/Chrome)
::-webkit-datetime-edit-fields-wrapper,
::-webkit-datetime-edit-text,
::-webkit-datetime-edit-month-field,
::-webkit-datetime-edit-day-field,
::-webkit-datetime-edit-year-field {
  padding-top: 0;
  padding-bottom: 0;
}

::placeholder {
  text-overflow: ellipsis;
}

textarea {
  padding: $vpad $hpad;
  box-sizing: border-box;
  height: auto;
  background-color: var(--secondary);
  border: 1px solid var(--primary-400);
  border-radius: 0;

  &:focus {
    @include default-focus;
  }
}

select {
  border: 1px solid var(--primary-low);
}

table {
  th {
    font-weight: normal;
    color: var(--primary-medium);
    text-align: left;
    padding: 0.5em;
  }
}

input,
select,
textarea {
  color: var(--d-input-text-color);
  caret-color: currentColor;

  &[disabled],
  &[readonly] {
    cursor: not-allowed;
    color: var(--d-input-text-color--disabled);
    background-color: var(--d-input-bg-color--disabled);
    border: var(--d-input-border--disabled);
  }

  &:focus:required:invalid {
    color: var(--danger);
    border-color: var(--danger);
    outline: 1px solid var(--danger);
  }
}

// Common Classes

.sortable {
  white-space: nowrap;
  .discourse-no-touch & {
    &:hover,
    &:focus {
      background-color: var(--primary-low);
    }
  }
  .d-icon {
    margin-left: 0.25em;
  }
  @include unselectable;
  cursor: pointer;
}

.radio,
.checkbox {
  min-height: 18px;
  padding-left: 18px;

  .controls > &:first-child {
    padding-top: 5px;
  }

  &.inline {
    display: inline-block;
    padding-top: 5px;
    margin-bottom: 0;
    vertical-align: middle;
  }
}

.radio.inline .radio.inline,
.checkbox.inline .checkbox.inline {
  margin-left: 10px;
}

.container {
  @extend .clearfix;
}

.wrap {
  --d-wrap-padding-h: 10px;
  max-width: var(--d-max-width);
  margin-right: auto;
  margin-left: auto;
  padding: 0 var(--d-wrap-padding-h);
  .contents {
    position: relative;
  }
}

.boxed {
  &.white {
    background-color: var(--secondary);
  }
}

.full-width {
  margin-left: 12px;
}

.clear-transitions {
  transition: none !important;
}

.tip {
  display: inline-block;
  &.good {
    color: var(--success);
  }
  &.bad {
    color: var(--danger);
  }
}

.avatar-wrapper {
  background-color: var(--secondary);
  display: inline-block;
  border-radius: 50%;
}

.unread-high-priority-notifications {
  color: var(--secondary);
  background: var(--success);

  &.badge-notification[href] {
    color: var(--secondary);
  }
}

.d-header .header-dropdown-toggle .do-not-disturb-background {
  position: absolute;
  left: 0;
  bottom: -1px;
}

.do-not-disturb-background {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 1.25em;
  background-color: var(--secondary);
  border-radius: 50%;
  height: 1.25em;

  .d-icon.d-icon-discourse-dnd {
    color: var(--header_primary-medium) !important;
    font-size: 1em;
    height: 1em;
    width: 1em;
  }
}

.d-header .header-dropdown-toggle .user-status-background {
  position: absolute;
  right: -3px;
  bottom: -1px;
  z-index: 1002;
}

.user-status-background {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 1.25em;
  height: 1.25em;
  background-color: var(--secondary);
  border-radius: 50%;

  .emoji {
    width: 14px;
    height: 14px;
    display: block;
  }
}

.user-menu .quick-access-panel li.user-status .relative-date {
  text-align: left;
  font-size: var(--font-down-3);
  padding-top: 0.45em;
  margin-left: 0.75em;
  color: var(--primary-medium);
}

.user-menu .quick-access-panel li.do-not-disturb {
  display: flex;
  flex: 0 0 100%;
  flex-wrap: wrap;
  align-items: center;
  background: var(--secondary);

  .do-not-disturb-inner-container {
    display: flex;
    width: 100%;
    align-items: center;

    .do-not-disturb-label {
      display: flex;
      align-items: center;
    }

    .relative-date {
      text-align: left;
      font-size: var(--font-down-3);
      padding-top: 3px;
      margin-left: 0.75em;
      color: var(--primary-medium);
    }

    .d-icon-toggle-off,
    .d-icon-toggle-on {
      padding-top: 0;
    }

    .d-icon-toggle-on {
      color: var(--tertiary);
    }
  }
}

.do-not-disturb-modal {
  .do-not-disturb-choice {
    display: grid;
    grid-template-columns: 2em 1fr auto;
    grid-template-rows: auto auto;
    align-items: center;
    cursor: pointer;
    padding: 0.5em 0;

    &:hover {
      background-color: var(--tertiary-low);
    }

    label {
      margin-bottom: 0;
    }
  }
}

.fade {
  opacity: 0;
  transition: opacity 0.15s linear;

  &.in {
    opacity: 1;
  }
}

.inline-spinner {
  display: inline-block;
  margin: 0;
}

.spinner {
  margin: 20px auto 20px auto;
  position: relative;
  -webkit-animation: rotate-forever 1s infinite linear;
  animation: rotate-forever 1s infinite linear;
  height: 30px;
  width: 30px;
  border: 4px solid var(--primary-low-mid);
  border-right-color: transparent;
  border-radius: 50%;

  &.small {
    width: 10px;
    height: 10px;
    margin: 0;
    display: inline-block;
  }
}

.content-list {
  h3 {
    color: var(--primary-medium);
    font-size: var(--font-up-1);
    padding-left: 5px;
    margin-bottom: 10px;
  }

  ul {
    list-style: none;
    margin: 0;

    li {
      border-bottom: 1px solid var(--primary-low);

      &:first-of-type {
        border-top: 1px solid var(--primary-low);
      }

      a {
        display: block;
        padding: 10px;
        color: var(--primary);

        &:hover {
          background-color: var(--primary-low);
          color: var(--primary);
        }

        &.active {
          font-weight: bold;
          color: var(--primary);
          background: var(--d-selected);
        }
      }
    }
  }
}

.form-vertical {
  input,
  textarea,
  select {
    display: inline-block;
    margin-bottom: 0;
    flex: 0 0 auto;
    max-width: 100%;
  }

  .control-label:not(.checkbox-label) {
    font-family: var(--heading-font-family);
    font-weight: bold;
    font-size: var(--font-up-2);
    line-height: var(--line-height-large);
  }

  .control-group,
  .controls {
    margin-left: 0;
    label {
      font-weight: normal;
    }
  }
}

// Special elements

#main-outlet-wrapper {
  box-sizing: border-box;
  width: 100%;
  display: grid;
  grid-template-areas: "sidebar content";
  grid-template-columns: 0 minmax(0, 1fr); // 0 column width needs to be set for CSS transitions
  gap: 0;

  #main-outlet {
    grid-area: content;
  }
}

#main-outlet {
  padding-top: 1.5em;
}

#main {
  img.avatar {
    &.header {
      width: 45px;
      height: 45px;
    }

    &.medium {
      width: 32px;
      height: 32px;
    }

    &.small {
      width: 25px;
      height: 25px;
    }

    &.tiny {
      width: 20px;
      height: 20px;
    }
  }

  .user-list {
    .user {
      padding-bottom: 5px;
    }
  }
}

#loading-message {
  position: absolute;
  font-size: var(--font-up-5);
  text-align: center;
  top: 120px;
  left: 500px;
  color: var(--primary);
}

#footer {
  .container {
    height: 50px;
    .contents {
      padding-top: 10px;
      a[href] {
        color: var(--secondary);
      }
    }
  }
}

.inline {
  display: inline;
}

.pref-email {
  .row {
    border-bottom: 1px solid #ddd;
    margin: 5px 0px;
    padding-bottom: 5px;

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

  .email-first {
    font-size: 1.1em;
  }

  .email-second {
    color: var(--primary-medium);

    .primary {
      color: var(--success);
      font-weight: bold;
    }

    .unconfirmed {
      font-style: italic;
    }
  }

  .email-dropdown {
    float: right;

    .btn,
    .btn:hover {
      background: transparent;

      .d-icon {
        color: var(--primary-high);
      }
    }
  }

  .dropdown-menu {
    width: 120px;

    & .icon {
      margin-top: auto;
    }
  }
}

.topic-statuses {
  // avoid adding margin/padding on this parent; sometimes it appears as an empty container
  float: left;
  .topic-status {
    margin: 0;
    display: inline-flex;
    color: var(--primary-medium);
    margin-right: 0.2em;
    .d-icon {
      height: 0.74em;
      width: 0.75em;
    }
  }

  .topic-status-warning .d-icon-envelope {
    color: var(--danger);
  }
}

.broken-theme-alert-banner {
  font-size: var(--base-font-size);
  font-weight: bold;
  padding: 5px 0;
  background: var(--danger);
  text-align: center;
  z-index: z("max");
  color: var(--secondary);

  a {
    color: var(--secondary);
    text-decoration: underline;
  }

  .theme-error-suffix {
    font-weight: normal;
  }
}

.controls {
  .grouped-control {
    display: flex;
    flex-direction: column;

    .grouped-control-label {
      padding: 0.25em 0;
    }

    .grouped-control-field {
      flex: 1 0 auto;
      display: flex;
      padding-bottom: 0.25em;

      label {
        margin: 0;
      }
    }
  }
}

a#skip-link {
  padding: 0.25em 0.5em;
  position: fixed;
  top: -50px;
  left: 1em;
  color: var(--secondary);
  background: var(--tertiary);
  transition: top 0.3s ease-out;
  z-index: z("header") + 1;
  &:focus {
    top: 0px;
    transition: top 0.15s ease-in;
  }
}

.scroll-lock {
  overflow: hidden !important;
  margin-right: var(--scroll-gap, 0);
}