#more-about-play, #more-about-research {
    display: none; /* hidden by default */
}

#more-about-play:target, #more-about-research:target {
    display: block; /* shown when a link targeting this id is clicked */
}

#more-about-play + ul.controls {
    list-style-type: none; /* aesthetics only, adjust to taste, irrelevant to demo */
}

/* hiding the hide link when the #textarea is not targeted,
   hiding the show link when it is selected: */
#more-about-play + ul.controls .hide,
#more-about-play:target + ul.controls .show {
    display: none;
}

/* Showing the hide link when the #textarea is targeted,
   showing the show link when it's not: */
#more-about-play:target + ul.controls .hide,
#more-about-play + ul.controls .show {
    display: inline-block;
}


#more-about-research {
    display: none; /* hidden by default */
}

#more-about-research:target {
    display: block; /* shown when a link targeting this id is clicked */
}

#more-about-research + ul.controls {
    list-style-type: none; /* aesthetics only, adjust to taste, irrelevant to demo */
}

/* hiding the hide link when the #textarea is not targeted,
   hiding the show link when it is selected: */
#more-about-research + ul.controls .hide,
#more-about-research:target + ul.controls .show {
    display: none;
}

/* Showing the hide link when the #textarea is targeted,
   showing the show link when it's not: */
#more-about-research:target + ul.controls .hide,
#more-about-research + ul.controls .show {
    display: inline-block;
}