html {
	position: relative;
	min-height: 100vh;
}

body {
	background: url(https://images.pexels.com/photos/924824/pexels-photo-924824.jpeg?auto=compress&cs=tinysrgb&dpr=2&h=750&w=1260)
		no-repeat;
	background-size: cover;
	display: flex;
	flex-direction: column;
}

/* ----- how to play popup ----*/
.popup {
	position: fixed;
	left: 50%;
	top: 55%;
	z-index: 1;
}

.popup .wrapper {
	position: relative;
	left: -50%;
	border-radius: 10px;
	background: radial-gradient(transparent, rgb(175, 48, 175)),
		url(https://images.pexels.com/photos/2162/sky-space-dark-galaxy.jpg?auto=compress&cs=tinysrgb&dpr=2&h=750&w=1260);
	opacity: 0.75;
	border: 5px solid gold;
	color: rgb(221, 209, 223);
}

.wrapper h1,
h2 {
	font-family: atomic age, Arial, Helvetica, sans-serif;
	font-size: 1.6rem;
}

/* popup pulsing border animation */

.instructions {
	width: 20rem;
}

.content {
	flex: 1 0 auto;
	align-items: center;
}

.wrapper:before,
.wrapper:after {
	content: '';
	display: block;
	position: absolute;
	border-radius: 10px;
	box-shadow: inset 0 0 5px rgb(250, 248, 215),
		/* inner white */ inset 0px 0 4px #f0f,
		/* inner left magenta short */ inset 0px 0 4px #0ff,
		/* inner right cyan short */ inset 0px 0 30px #f0f,
		/* inner left magenta broad */ inset 0px 0 30px #0ff,
		/* inner right cyan broad */ 0 0 50px rgb(250, 248, 215),
		/* outer white */ -10px 0 80px #f0f,
		/* outer left magenta */ 10px 0 80px #0ff;
	left: -2px;
	right: -2px;
	top: -2px;
	bottom: -2px;
	animation: animate 2.4s linear infinite;
}
/* ---- nav-bar ---- */
#logo {
	float: left;
	height: 50px;
	font-family: atomic age, Arial, Helvetica, sans-serif;
	font-size: 1.7rem;
	font-weight: 700;
	line-height: 40px;
	text-align: center;
	-webkit-text-stroke-width: 0.1px;
	-webkit-text-stroke-color: rgb(212, 199, 17);
	margin-left: 0px;
}

#masthead {
	position: static;
	z-index: 99;
	width: 100%;
	overflow: auto;
	color: rgb(41, 37, 37);
	-webkit-text-stroke-width: 0.1px;
	-webkit-text-stroke-color: rgb(212, 199, 17);
	background-color: rgb(175, 114, 175);
}

#navbarNav {
	justify-content: flex-end;
}

.navbar-light .navbar-nav .nav-link {
	color: gold;
}

.navbar {
	padding: 0px;
}

nav a {
	display: inline-block;
	margin-left: 15px;
	line-height: 18px;
	text-decoration: none;
}

/* ----page title ---- */
.jumbotron {
	padding-top: 1rem;
	height: 90px;
	background: radial-gradient(transparent, rgb(207, 118, 207));
	border-bottom: 1px solid gold;
	margin-bottom: 0vh;
}

.jumbotron h1 {
	font-size: 1.7rem;
	text-align: center;
	font-family: atomic age, Arial, Helvetica, sans-serif;
	color: rgb(41, 37, 37);
	-webkit-text-stroke-width: 0.5px;
	-webkit-text-stroke-color: rgb(212, 199, 17);
	width: 100%;
}

.jumbotron .score {
	font-size: 1rem;
}

.score {
	font-family: atomic age;
	font-size: 0.75rem;
	color: rgb(221, 209, 223);
	text-align: center;
}

.score-border {
	display: flex;
	justify-content: center;
	align-items: center;
	border: 0.7px solid gold;
	background: radial-gradient(transparent, rgb(223, 172, 223));
	height: 20%;
	min-height: 40px;
}

.score-margin {
	margin-bottom: 5rem;
}

/* ---- crystals ---- */

.btn {
	flex: 1;
	background: radial-gradient(transparent, rgb(175, 48, 175)),
		url(https://images.pexels.com/photos/2162/sky-space-dark-galaxy.jpg?auto=compress&cs=tinysrgb&dpr=2&h=750&w=1260);
	opacity: 0.75;
	border: 1px solid gold;
	box-shadow: inset 0 0 5px rgb(252, 251, 236),
		/* inner white */ inset 0px 0 4px rgb(233, 33, 233),
		/* inner left magenta short */ inset 0px 0 4px rgb(0, 255, 200),
		/* inner right cyan short */ inset 0px 0 20px rgb(233, 33, 233),
		/* inner left magenta broad */ inset 0px 0 20px rgb(0, 255, 200),
		/* inner right cyan broad */ 0 0 5px rgb(250, 249, 238),
		/* outer white */ -4px 0 20px rgb(233, 33, 233),
		/* outer left magenta */ 4px 0 20px rgb(0, 255, 200);
	max-width: 120px;
	height: auto;
	color: rgb(221, 209, 223);
}

.img {
	width: auto;
	max-width: 0 auto;
	height: auto;
	max-height: 80px;
}

.row {
	justify-content: center;
}

.rowbtn {
	display: flex;
	justify-content: center;
	align-items: center;
	width: 50%;
	margin-bottom: 2rem;
}

@-webkit-keyframes animate {
	0% {
		transform: scale(1);
		opacity: 0;
	}
	50% {
		opacity: 1;
	}
	100% {
		transform: scale(1);
		opacity: 0;
	}
}

/* media queries for larger pages */
@media screen and (min-width: 319px) {
	.score-margin {
		margin-bottom: 1rem;
	}
	.popup {
		top: 40%;
	}
}

@media screen and (min-width: 375px) {
	.popup {
		top: 40%;
	}
	.jumbotron .score {
		font-size: 1.5rem;
	}
	.score-border {
		height: 50px;
	}
	.score {
		font-size: 1rem;
	}
	.rowbtn {
		margin-bottom: 5rem;
	}
	.btn {
		max-width: 150px;
	}
	.img {
		max-height: 125px;
	}
	.score-margin {
		margin-bottom: 2.5rem;
	}
}

@media screen and (min-width: 767px) {
	.instructions {
		width: 45rem;
	}
	.popup {
		top: 40%;
	}
	.jumbotron {
		height: 200px;
	}
	.jumbotron h1 {
		font-size: 3.5rem;
		margin-bottom: 0px;
		-webkit-text-stroke-width: 0.1rem;
	}
	.jumbotron .score {
		font-size: 2.5rem;
	}
	.score-border {
		height: 50px;
	}
	.score {
		font-size: 1.5rem;
	}
	.rowbtn {
		margin-bottom: 5rem;
	}
	.row {
		flex-wrap: nowrap;
	}
	.btn {
		max-width: 150px;
	}
	.img {
		max-height: 125px;
	}
}

@media screen and (min-width: 1020px) {
	.instructions {
		width: 50rem;
	}
	.popup {
		top: 40%;
	}
	.jumbotron {
		height: 300px;
	}
	.jumbotron h1 {
		font-size: 5.5rem;
		margin-bottom: -0.5rem;
		-webkit-text-stroke-width: 0.2rem;
	}
	.jumbotron .score {
		font-size: 3rem;
	}
	.score-border {
		height: 50px;
	}
	.score {
		font-size: 2rem;
	}
	.rowbtn {
		margin-bottom: 5rem;
	}
	.row {
		flex-wrap: nowrap;
	}
	.btn {
		max-width: 300px;
		margin: 2rem;
	}
	.img {
		max-height: 200px;
	}
	.score-margin {
		margin-bottom: 4rem;
	}
}