.expander,
arrow {
    min-height: 14px;
    min-width: 14px;
}

arrow.up,
arrow.top {
    -gtk-icon-source: -gtk-icontheme("pan-up-symbolic");
}

arrow.down,
arrow.bottom,
combobox arrow,
expander:checked,
.expander:checked,
expander arrow:checked {
    -gtk-icon-source: -gtk-icontheme("pan-down-symbolic");
}

arrow.left,
menuitem arrow {
    -gtk-icon-source: -gtk-icontheme("pan-start-symbolic");
}

arrow.right,
expander,
.expander,
expander arrow {
    -gtk-icon-source: -gtk-icontheme("pan-end-symbolic");
}