#links_tree_buttons {
	display:	block;
	
	max-width:	100%;
	max-height:	50vh;
	
	text-align:	center;
}


#links_tree_buttons a.button,
#links_tree_buttons a.button:visited {
	display:	inline-block;
	
	box-sizing: border-box;

	margin: 	1vh	5vw;
	border:		none;
	padding: 	1vh 1vw;
	
	text-decoration: none;

	font-variant:	small-caps;
	font-size:		3vw;
	
	color:	white;

	transition: 0.5s;
}
#links_tree_buttons a.button:hover,
#links_tree_buttons a.button:active {
	transition: 1s;
}

#links_tree_buttons a.button img{
	max-width:	20vw;
	max-height:	10vh;

	margin-top:		2vw;
	margin-left:	0vw;
	margin-right:	0vw;
	margin-bottom:	2vw;

	transition: 0.5s;
}
#links_tree_buttons a.button:hover img,
#links_tree_buttons a.button:active img{
	max-height:	calc(10vh + 4vw);
	
	margin-top:		0vw;
	margin-bottom:	0vw;
}

#links_tree_buttons a.button b.word{
	font-size:	calc( max(4vw, 4vh) );
	
	opacity:	0;
	
	transition: 1.0s;
}
#links_tree_buttons a.button:hover b.word,
#links_tree_buttons a.button:active b.word{
	opacity:	100;
	
	transition: 1.5s;
}