#frame_interval_slider input[type="range"] { --range_progress_inverted: calc(100% - var(--range_progress)); } #frame_interval_slider input[type="range"]::-webkit-slider-runnable-track { background: linear-gradient(to right, var(--color-accent) var(--range_progress_inverted), var(--neutral-200) var(--range_progress_inverted)); } #frame_interval_slider input[type="range"]::-moz-range-track { background: linear-gradient(to right, var(--color-accent) var(--range_progress_inverted), var(--color-accent) var(--range_progress_inverted)); } #frame_interval_slider .slider_input_container { direction: rtl; }