buttons:
* previous & next in the result page
* save, restore, & back in the preferences
* back to top
<select> input in Chrom* browsers:
* fix the white text with a white background issue
It is not possible to use CSS variable in a SVG when this is in a background.
This commit adds two .svg files, less converts them into data URL.
The two files are indentical except the fill color.
* remove vim arrow
* add 1rem padding to results
* add 0.2rem left border to vim selected article
* set column gap to 1.2rem and make search bar in line with results
* put 10px border-radius selected article
* result article: 0.125rem margin on tablet and esktop; 1rem margin on phone
* index page: margin top is 24% of the view port.
avoid to scroll a small screen,
center the content in the middle of the screen
* link to preferences at the same height same the input fields
* increase the category tab heighs
* increase the margin bottom of the query field
* in the results, change the h3 margin top and bottom to 0.4rem (6px)
* move the back to top button slightly on the right when the results are only images
When an image is selected, the detail with the full size image is displayed
on the right side of the screen (or full screen on tablet and phone).
When Javascript is disabled, the thumbnail is a linked to the full size image,
as it was before.
When the image proxy is enabled, the full size image is also proxied,
in consequence this commit increases the bandwidth usage of instances.
The detail can be closed by the close button or the Esc key.
It is possible to go to the next and previous images using the j and k keys
or the button on the top right of the screen.
* url in article head is clickable
* url is bigger now 0.96em font
* url is now left floating on tablet and phone
* there is a 8px top and bottom margin on h3 result heading
* rework search form as grid layout
* remove various paddings and margins
* add logo and link to index to search form
* make categories bigger on phone
