:root {
	--text-color: white;
	--easing: cubic-bezier(0, 1.75, 1, 1);

	/* Environment */
	--sun-x: 0;
	--sun-y: -1;
	--sky-color: #101a2a;
	--fog-color: #000000;
	--sun-color: #ffd700;
	--sun-glow-color: #fffae0;
}

* {
	scrollbar-color: var(--sun-color) var(--sky-color);
	scrollbar-width: thin;
}

:focus-visible {
	outline: 2px outset #ffffffb0;
	outline-offset: 2px;
	overflow: visible;
}

::selection {
	color: inherit;
	background: #0080ff60;
}

html {
	scroll-behavior: smooth;
	font-family: 'Avenir', 'Helvetica Neue', 'Helvetica', 'Arial', 'Hiragino Sans', 'ヒラギノ角ゴシック', YuGothic, 'Yu Gothic', 'メイリオ', Meiryo, 'ＭＳ Ｐゴシック', 'MS PGothic', sans-serif;
	font-weight: 400;
	background: linear-gradient(to bottom, var(--sky-color), var(--fog-color)), var(--sky-color);
	background-attachment: fixed;
	min-height: 100vh
}

body {
	max-width: 512px;
	margin: 0 auto;
	color: var(--text-color);
	overflow-x: hidden;
}

.sun {
	aspect-ratio: 1;
	height: 96px;
	width: auto;
	position: fixed;
	top: calc(50vh - var(--sun-y) * 30vh - 60px);
	left: calc(50vw + var(--sun-x) * min(50vw, 448px));
	background: radial-gradient(circle, var(--sun-glow-color));
	box-shadow:
		0 0 50px var(--sun-glow-color),
		0 0 100px var(--sun-color),
		0 0 150px var(--sun-color);
	border-radius: 50%;
	filter: blur(1px);
	pointer-events: none;
	z-index: -1;
}

section,
footer {
	--border-radius: 34px;
	margin-block: 32px;
	padding: 18px 36px;
	border-radius: var(--border-radius);
	box-shadow:
		0px 4px 36px #00000030,
		inset 0 0 5px -4px white,
		inset 0 0 32px -24px #ffffff60;
	--filter: url(#glass);
	backdrop-filter: var(--filter);
	--webkit-backdrop-filter: var(--filter);
}

h1 {
	font-size: 32px;
	margin-block: 6px;
}

p,
label {
	font-size: 18px;
	text-shadow: 0 2px 2px #00000040;
}

h2 {
	font-size: 24px;
	margin-block: 14px;
}

footer {
	display: flex;
	flex-direction: row;
	justify-content: space-between;
	align-items: center;
}

footer p {
	font-size: 18px;
	margin: 7px auto;
}

.footer-link {
	color: inherit;
	opacity: 0.8;
	transition: 0.1s;
}

.footer-link:hover {
	opacity: 1;
}

.copyright {
	display: inline-block;
	opacity: 0.6;
}

@media screen and (max-width: 604px) {
	h1 {
		font-size: 26px;
	}

	p,
	li {
		font-size: 16px;
	}

	section,
	footer {
		--border-radius: 28px;
		margin: 18px 10px;
		padding: 13px 22px;
	}

	h2 {
		font-size: 23px;
		margin-block: 12px;
	}

	footer {
		justify-content: center;
		flex-wrap: wrap;
	}

	footer p {
		font-size: 16px;
		margin: 4px 10px;
	}
}