platform/packages/theme/styles/_layouts.scss

//
// Copyright © 2021 Anticrm Platform Contributors.
// 
// Licensed under the Eclipse Public License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License. You may
// obtain a copy of the License at https://www.eclipse.org/legal/epl-2.0
// 
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// 
// See the License for the specific language governing permissions and
// limitations under the License.
//

/* CLEAR */
button {
  display: flex;
  justify-content: center;
  align-items: center;
  margin: 0;
  padding: 0;
  font-size: inherit;
  background-color: transparent;
  border: 1px solid transparent;
  outline: none;
  cursor: pointer;
}
input {
  font-family: inherit;
  font-size: inherit;
  background-color: transparent;
  outline: none;
  color: var(--theme-caption-color);
}
audio, canvas, embed, iframe, img, object, svg, video {
  display: block;
  vertical-align: middle;
}
input:-webkit-autofill,
input:-webkit-autofill:hover, 
input:-webkit-autofill:focus
input:-webkit-autofill, 
textarea:-webkit-autofill,
textarea:-webkit-autofill:hover
textarea:-webkit-autofill:focus,
select:-webkit-autofill,
select:-webkit-autofill:hover,
select:-webkit-autofill:focus {
  -webkit-text-fill-color: var(--theme-caption-color);
  transition: background-color 5000s ease-in-out 0s;
  background: transparent;
}

// input:-webkit-autofill,
// input:-webkit-autofill:hover,
// input:-webkit-autofill:focus,
// input:-webkit-autofill:active {
//   -webkit-animation: autofill 0s forwards;
// }
 
// @-webkit-keyframes autofill {
//   100% {
//     background: transparent;
//     color: inherit;
//   }
// }

/* Common */
.flex { display: flex; }
.flex-nowrap {
  display: flex;
  flex-wrap: nowrap;
}
.flex-center {
  display: flex;
  justify-content: center;
  align-items: center;
}
.flex-between {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.flex-stretch {
  display: flex;
  align-items: stretch;
}
.flex-row-center {
  display: flex;
  align-items: center;
  flex-wrap: nowrap;
}
.flex-row-reverse {
  display: flex;
  flex-direction: row-reverse;
  align-items: center;
}
.flex-col {
  display: flex;
  flex-direction: column;
}
.flex-col-center {
  display: flex;
  flex-direction: column;
  align-items: center;
}
.flex-col-stretch {
  display: flex;
  flex-direction: column;
  align-items: stretch;
}
.h-full { height: 100%; }
.square-36 { width: 2.25rem; height: 2.25rem; }

/* --------- */
.hidden-text {
  position: absolute;
  visibility: hidden;
  overflow: hidden;
  white-space: pre-wrap;
}

.focused-button {
  background-color: var(--theme-button-bg-focused);
  border: 1px solid transparent;

  & > .icon { opacity: .3; }
  &.selected {
    background-color: var(--theme-button-bg-focused);
    border: 1px solid var(--theme-bg-accent-color);
  }
  &:hover {
    background-color: var(--theme-button-bg-pressed);
    border: 1px solid var(--theme-bg-accent-color);
    & > .icon { opacity: 1; }
  }
  &:focus {
    border: 1px solid var(--primary-button-focused-border);
    box-shadow: 0 0 0 3px var(--primary-button-outline);
    & > .icon { opacity: 1; }
  }
}

/* Backgrounds & Colors */
.background-theme-bg-color { background-color: var(--theme-bg-color); }
.background-highlight-red { background-color: var(--highlight-red); }
.background-button-bg-enabled { background-color: var(--theme-button-bg-enabled); }
.background-menu-divider { background-color: var(--theme-menu-divider); }
.background-primary-button-enabled { background-color: var(--primary-button-enabled); }

.content-color { color: var(--theme-content-color); }
.content-trans-color { color: var(--theme-content-trans-color); }
.caption-color { color: var(--theme-caption-color); }

.border-primary-button { border-color: var(--primary-button-border); }
.border-button-enabled { border: 1px solid var(--theme-button-border-enabled); }
.bottom-divider { border-bottom: 1px solid var(--theme-menu-divider); }

/* Popups */
.popup-top-right::after, .popup-top-right::before, .popup-top-left::after, .popup-top-left::before, .popup-bottom-right::after, .popup-bottom-right::before, .popup-bottom-left::after, .popup-bottom-left::before {
  content: '';
  position: absolute;
  width: .625rem;
  height: 1.75rem;
  clip-path: path('M0.6,8.3l2.7,2.4C4.4,11.8,5,12.8,5,14C5,13.1,5,0.9,5,0c0,1.2-0.6,2.2-1.7,3.2L0.6,5.7 c-0.7,0.6-0.8,1.7-0.2,2.5C0.5,8.2,0.5,8.3,0.6,8.3z');
}

.popup-top-right::after, .popup-top-right::before, .popup-top-left::after, .popup-top-left::before
  { transform: rotate(-90deg); }
.popup-bottom-right::after, .popup-bottom-right::before, .popup-bottom-left::after, .popup-bottom-left::before
  { transform: rotate(90deg); }
.popup-top-right::after, .popup-top-left::after, .popup-bottom-right::after, .popup-bottom-left::after
  { background-color: var(--theme-button-bg-hovered); }
.popup-top-right::before, .popup-top-left::before, .popup-bottom-right::before, .popup-bottom-left::before
  { background-color: var(--theme-button-bg-hovered); box-shadow: inset 0 0 0 2rem var(--theme-button-border-enabled); }
.popup-top-right::after, .popup-top-left::after
  { bottom: -.875rem; }
.popup-top-right::before, .popup-top-left::before
  { bottom: -.9375rem; }
.popup-bottom-right::after, .popup-bottom-left::after
  { top: -.875rem; }
.popup-bottom-right::before, .popup-bottom-left::before
  { top: -.9375rem; }
.popup-top-left::after, .popup-top-left::before, .popup-bottom-left::after, .popup-bottom-left::before
  { right: 1.5rem; }
.popup-top-right::after, .popup-top-right::before, .popup-bottom-right::after, .popup-bottom-right::before
  { left: 1.5rem; }