gnu-social/public/assets/css/left/left.css

.icon-left {
    position: fixed;
    top: 0;
    left: 0;
    padding: calc(3 * var(--unit-size));

    width: var(--main-size);
    height: auto;

    fill: var(--white);
    stroke-width: 0;
    vertical-align: middle;
}