#copyright {font-size:0;}
#copyright:before {
	font-size:small;
	content:"© 2016-2025 キノコ(毒)";
}

@media only screen and (min-width: 780px) {
   #c{
	position:absolute;
	left:50%;
	transform: translateX(-50%);
    -webkit-transform: translateX(-50%);
    -ms-transform: translateX(-50%);
	margin-bottom:10px;
   }
}

@media screen and (max-width: 779px) {
   #c{
	position:absolute;
	right:10px;
	margin-bottom:10px;
   }
}