html {
	height: -webkit-fill-available;
}

body {
	background: linear-gradient(90deg, #000000, #003e39);
	background: -webkit-linear-gradient(90deg, #000000, #003e39);
	font-family: "Noto Sans KR", sans-serif;
}

.context {
	width: 100%;
	position: absolute;
	top: 10vh;
}

.context h1,
.context h2,
.context h3,
.context h4 {
	text-align: center;
	color: white;
}

.area {
	background: #011e1c;
	width: 100%;
	height: calc(100vh - calc(100vh - 100%));
}

.circles {
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	overflow: hidden;
}

.circles li {
	position: absolute;
	display: block;
	list-style: none;
	width: 20px;
	height: 20px;
	background-image: url("../assets/imgs/unlam.png");
	background-repeat: no-repeat;
	animation: animate 25s linear infinite;
	bottom: -150px;
}

.circles li:nth-child(1) {
	left: 15%;
	width: 100px;
	height: 100px;
	animation-delay: 0s;
}

.circles li:nth-child(2) {
	left: 30%;
	width: 100px;
	height: 100px;
	animation-delay: 2s;
	animation-duration: 12s;
}

.circles li:nth-child(3) {
	left: 45%;
	width: 100px;
	height: 100px;
	animation-delay: 4s;
}

.circles li:nth-child(4) {
	left: 60%;
	width: 100px;
	height: 100px;
	animation-delay: 0s;
	animation-duration: 18s;
}

.circles li:nth-child(5) {
	left: 75%;
	width: 100px;
	height: 100px;
	animation-delay: 0s;
}

.circles li:nth-child(6) {
	left: 90%;
	width: 100px;
	height: 100px;
	animation-delay: 3s;
}

.circles li:nth-child(7) {
	left: 1%;
	width: 100px;
	height: 100px;
	animation-delay: 7s;
}

.circles li:nth-child(8) {
	left: 55%;
	width: 100px;
	height: 100px;
	animation-delay: 15s;
	animation-duration: 45s;
}

.circles li:nth-child(9) {
	left: 25%;
	width: 100px;
	height: 100px;
	animation-delay: 2s;
	animation-duration: 35s;
}

.circles li:nth-child(10) {
	left: 5%;
	width: 100px;
	height: 100px;
	animation-delay: 0s;
	animation-duration: 11s;
}

@keyframes animate {
	0% {
		transform: translateY(0) rotate(-10deg);
		opacity: 0;
		border-radius: 50%;
	}

	100% {
		transform: translateY(-1000px) rotate(1000deg);
		opacity: 1;
		border-radius: 50%;
	}
}