/* Sidebar header: toggle + new chat */

.sidebar__header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 12px 0;
}

.sidebar__toggle {
  flex-shrink: 0;
  background: none;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 7px 8px;
  cursor: pointer;
  color: var(--text-muted);
  line-height: 1;
  transition: color 0.15s, background 0.15s;
}

.sidebar__toggle:hover {
  color: var(--text);
  background: var(--surface-alt);
}

.sidebar__new-chat {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: var(--primary);
  color: var(--primary-text);
  border: none;
  border-radius: 8px;
  font-size: 14px;
  font-family: inherit;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s;
  white-space: nowrap;
}

.sidebar__new-chat:hover {
  background: var(--primary-hover);
}

/* Collapsed-state toggle: visible only when sidebar is collapsed */

.sidebar__toggle-collapsed {
  display: none;
  position: fixed;
  top: 76px;
  left: 12px;
  z-index: 9;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 8px;
  cursor: pointer;
  color: var(--text-muted);
  line-height: 1;
  transition: color 0.15s;
}

.sidebar__toggle-collapsed:hover {
  color: var(--text);
}

.sidebar--collapsed ~ .sidebar__toggle-collapsed {
  display: block;
}