Congratulations on completing this challenge π
I have one suggestion regarding your input slider.
You don't have to use div to make a slider with thumb.
HTML already have a input method for this. It is called type="range"
Syntax below
<input name="slider" id="slider" type="range" min="1" max="5" step="1" value="3" />
Here, you can choose min,max and step.
When user moves the thumb on the track (slider bar), the thumb automatically goes to the next value. So user can only choose the pre-defined values rather than every possible value between min and max.
Value attribute gives the slider a default position when page loads.
further you can style the thumb and track in css the way you like.
I hope you find this useful