.screen {
  position: absolute;
  top: 0px; bottom: 0px;
  background: red;
}

.column {
  display: flex;
  flex-direction: column;
//  background: yellow;
  margin: 10px;
}

.row {
  display: flex;
  flex-direction: row;
}

.stretch {
  flex-basis: 0;
//  flex-grow: 1;
//  flex-shrink: 1;
}


.fixed {
  flex-grow: 1;
  flex-shrink: 1;
}

.scroll-y {
  overflow-y: auto;
}

.scroll-x {
  overflow-x: auto;
}

.button {
  border: 2px; margin: 3px;
  max-width: 50px;
  overflow-x: hidden;
}


img {
  max-width: 600px;
  display: block;
//  overflow-x: auto;
}

pre {
  max-width: 650px;
  overflow-x: auto;
}

.content {
  width: 800px;
}

.content > div {
  overflow-x: show;
  margin-left: auto;
  margin-right: auto;
}

.content > div > * {
  max-width: 600px;
}

.tabs > .row {
  flex-grow: 0; flex-shrink: 0;
  margin: 10px;
}

.tabs > .row > * {
  max-width: 50px;
  overflow-x: hidden;
  margin-right: 5px;
}

.tabs > .row > .selected {
  max-width: 200px;
  background: yellow;
}

.message {
  border: 1px solid black;
  padding: 5px;
  background: white;
  display: block;
  flex-basis: 0;
}

.message > .title > .message_meta {
  margin-right: 5px;
}
.message > .title > .avatar {
  margin-right: 5px;
}