body {
  display: flex;
}

main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

/* ── Sidebar ── */

#sidebar {
  width: 260px;
  background: var(--f1-bg);
  border-right: var(--border-width) solid var(--f1-border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  overflow: hidden;
}

.sidebar-header {
  padding: var(--s4);
  border-bottom: var(--border-width) solid var(--f1-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

#sessionList {
  flex: 1;
  overflow-y: auto;
}

.session-item {
  padding: var(--s4);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  border-left: 3px solid transparent;
}

.session-item:hover { background: var(--f3-bg); }

.session-item.active {
  background: var(--f3-bg);
  border-left-color: var(--primary);
}

.session-name {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  border: var(--border-width) solid transparent;
}