* {
	margin: 12px;
	padding: 0;
	box-sizing: border-box;
}

body {
	text-align: center;
	background-image: radial-gradient(circle, #ee4b2b, #553c9a);
	font-family: Consolas;
	text-shadow: 2px 2px 4px #000;
}

.container {
	margin-top: 50px;
}

.back-link {
	color: #fff;
}

.header {
	font-size: 5vw;
}

.tic {
	color: #0088ffc2;
	text-shadow: 0px 0px 5px #fdfdfe, 0px 0px 10px #fdfdfe, 0px 0px 10px #fdfdfe, 0px 0px 20px #fdfdfe;
}

.tac {
	color: #f70000ba;
	text-shadow: 0px 0px 5px #fdfdfe, 0px 0px 10px #fdfdfe, 0px 0px 10px #fdfdfe, 0px 0px 20px #fdfdfe;
}

.toe {
	color: #9d9997;
	text-shadow: 0px 0px 5px #fdfdfe, 0px 0px 10px #fdfdfe, 0px 0px 10px #fdfdfe, 0px 0px 20px #fdfdfe;
}

.link {
	font-size: 1.2vw;
	margin: 0 0 0 5px; 
}

/* for Twitter, GitHub icon */
.fa-brands {
	font-size: 1.5vw;
	text-decoration: none;
	text-shadow: 2px 2px 4px #000;
}

.fa-brands:hover {
	opacity: 0.7;
	text-decoration: none;
}

.fa-twitter {
	color: #55ACEE;
}

.fa-github {
	color: #000000;
}

span {
	color: aliceblue;
}

label {
	font-size: 1.2vw;
	font-weight: bold;
	color: #fff;
}

select {
	border-radius: 0.3vw;
	color: #8c0585b7;
	background-color: #fff;
	font-size: 1.3vw;
}

option {
	margin-top: 1vw;
	margin-bottom: 1vw;
}

table {
	border-collapse: collapse;
	position: absolute;
	left: 50%;
	margin-left: -150px;
	top: auto;
	box-shadow: 5px 10px 18px #000;
}

td {
	border:  2px solid #8c0585b7;
	height:  100px;
	width:  100px;
	text-align:  center;
	vertical-align:  middle;
	font-weight: bold;
	font-size:  70px;
	cursor: pointer;
}

.cell {
	background-color: #d6d6d6;
}

table tr:first-child td {
	border-top: 0;
}

table tr:last-child td {
	border-bottom: 0;
}

table tr td:first-child {
	border-left: 0;
}

table tr td:last-child {
	border-right: 0;
}

.endgame {
	display: none;
	width: 200px;
	top: 420px;
	background-color: #77e7dce2;
	position: absolute;
	left: 50%;
	margin-left: -100px;
	padding-top: 50px;
	padding-bottom: 50px;
	text-align: center;
	border-radius: 5px;
	color: white;
	font-size: 2em;
}


/* replay button */
button {
	margin-left: 1vw;
	-webkit-box-shadow: 0rem 0rem 1.25rem 0.2rem #fff;
	-moz-box-shadow: 0rem 0rem 1.25rem 0.2rem #fff;
	box-shadow: 0rem 0rem 1.25rem 0.2rem #fff;
}

.glow-on-hover {
	width: 6vw;
	height: auto;
	border: none;
	outline: none;
	color: #8c0585b7;
	font-size: 1.3vw;
	background-color: #fff;
	cursor: pointer;
	position: relative;
	z-index: 0;
	border-radius: 4px;
}

.glow-on-hover:before {
	content: '';
	background: linear-gradient(45deg, #ff0000, #ff7300, #00ffd9, #00ffa2, #00d9ff, #002bff, #7a00ff, #ff00c8, #ff0000);
	position: absolute;
	top: -2px;
	left:-2px;
	background-size: 400%;
	z-index: -1;
	filter: blur(5px);
	width: calc(100% + 4px);
	height: calc(100% + 4px);
	animation: glowing 20s linear infinite;
	opacity: 0;
	transition: opacity .3s ease-in-out;
	border-radius: 4px;
}

.glow-on-hover:active {
	color: #fff;
}

.glow-on-hover:active:after {
	background: transparent;
}

.glow-on-hover:hover:before {
	opacity: 1;
}

.glow-on-hover:after {
	z-index: -1;
	content: '';
	position: absolute;
	width: 100%;
	height: 100%;
	background: #fff;
	left: 0;
	top: 0;
	border-radius: 4px;
}

@keyframes glowing {
    0% { background-position: 0 0; }
    50% { background-position: 400% 0; }
    100% { background-position: 0 0; }
}


/* mobile */
@media only screen and (max-width: 1200px) {
	* {
		margin: auto;
		padding: 0;
		box-sizing: border-box;
	}

	.header {
		margin: 40px 0 20px 0;
		font-size: 12vw;
	}
	
	#link {
		font-size: 4vw;
		margin: 0 0 0 5px; 
	}
	
	/* for Twitter, GitHub icon */
	.fa {
		font-size: 4vw;
		text-decoration: none;
	}
	
	.fa:hover {
		opacity: 0.7;
		text-decoration: none;
	}
	
	.fa-twitter {
		color: #55ACEE;
	}
	
	.fa-github {
		color: #000000;
	}
	
	span {
		color: aliceblue;
	}
		
	label {
		font-size: 4.2vw;
		font-weight: bold;
		color: #fff;
	}
	
	select {
		border-radius: 0.3vw;
		color: #8c0585b7;
		background-color: #fff;
		font-size: 4.3vw;
		margin-top: 20px;
	}
	
	option {
		margin-top: 1vw;
		margin-bottom: 1vw;
	}

	.glow-on-hover {
		width: 17vw;
		height: auto;
		font-size: 4.3vw;
	}

	.endgame {
		top: 300px;
	}
}