/* ---- contract measures ---- */

:root {
  --rail-left: 268px;
  --rail-right: 340px;
  --pane-tag: 34px;
  --pane-padding: 18px;
}

@media (max-width: 1400px) {
  :root {
    --rail-left: 240px;
    --rail-right: 300px;
  }
}

.shell {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  grid-template-rows: var(--chrome-height) minmax(0, 1fr) var(--status-height);
  height: 100vh;
  height: 100dvh;
}

.chrome,
.statusbar {
  grid-column: 1 / -1;
}

.rail {
  grid-row: 2;
  grid-column: 1;
}

.stage {
  grid-row: 2;
  grid-column: 2;
  display: grid;
  grid-template-columns: var(--rail-left) minmax(0, 1fr) var(--rail-right);
  min-height: 0;
}

.pane {
  position: relative;
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
}

.pane--channels,
.pane--send {
  background: var(--chrome);
}

.pane--channels {
  border-right: 1px solid var(--rule);
}

.pane--send {
  border-left: 1px solid var(--rule);
}

.pane--message {
  background: var(--ink);
}

.pane__tag {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  height: var(--pane-tag);
  padding: 0 var(--pane-padding);
  border-bottom: 1px solid var(--rule);
  color: var(--text-timestamp);
  font: 400 var(--size-micro)/1 var(--font-mono);
  letter-spacing: .28em;
  text-transform: uppercase;
}

.pane__body {
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: var(--pane-padding);
  display: flex;
  flex-direction: column;
  gap: 14px;
}

/* ---- chrome ---- */

.chrome {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 0 var(--page-padding);
  border-bottom: 1px solid var(--rule);
  background: var(--chrome);
}

.chrome__left,
.chrome__right {
  display: flex;
  align-items: center;
  gap: 18px;
  min-width: 0;
}

.chrome__divider {
  width: 1px;
  height: 16px;
  background: var(--rule-strong);
}

.chrome__scene {
  color: var(--text-label);
  letter-spacing: .22em;
  text-transform: uppercase;
  white-space: nowrap;
}

/* ---- status bar ---- */

.statusbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  padding: 0 var(--page-padding);
  border-top: 1px solid var(--rule);
  background: var(--chrome);
}

.statusbar__site {
  color: var(--text-timestamp);
  letter-spacing: .18em;
}

.statusbar__counters {
  display: flex;
  gap: 22px;
}

.counter {
  display: inline-flex;
  gap: 6px;
}

.counter__label {
  color: var(--text-timestamp);
  letter-spacing: .18em;
}

.counter__figure {
  color: var(--lilac);
  letter-spacing: .18em;
}

@media (max-width: 1180px) {
  .stage {
    grid-template-columns: minmax(0, 1fr);
    grid-auto-rows: min-content;
    overflow-y: auto;
  }

  .pane--channels {
    border-right: 0;
    border-bottom: 1px solid var(--rule);
  }

  .pane--send {
    border-left: 0;
    border-top: 1px solid var(--rule);
  }

  .pane__body {
    overflow: visible;
  }
}