:root {
  --topbar-height: 56px;
  --composer-height: 100px;
}

html,
body,
#root {
  height: 100%;
  overscroll-behavior: none;
  user-select: none;
}

*::selection {
  color: #fff;
  background: hsla(229, 71%, 57%, 1);
}

#app {
  isolation: isolate;
  height: 100vh;
  display: grid;
  grid-template-columns: 352px 1fr auto;
}

#sidebar-community {
  overflow: auto;
  height: 100vh;
}

#sidebar-members {
  width: 352px;
  overflow: auto;
  background-color: #fff;
  z-index: 2;
}

#main {
  position: relative;
}

#topbar {
  position: absolute;
  inset: 0 0 auto;
  z-index: 100;
}

#content {
  position: relative;
  overflow: auto;
  padding-top: var(--topbar-height);
  padding-bottom: var(--composer-height);
  height: 100vh;
  isolation: isolate;
}

#messages {
  padding: 8px;
}

#anchor-actions {
  position: absolute;
  right: 20px;
  transform: translateY(calc(-100% - 12px));
}

#composer {
  position: absolute;
  inset: auto 0 0;
  z-index: 1;
}

@media screen and (max-width: 768px) {
  #app {
    grid-template-columns: 1fr;
  }

  #sidebar {
    display: none;
  }
}