*,
*::before,
*::after {
	box-sizing: border-box;
}

:root {
	--background-color: #f2f2f2;
	--primary-color: #3a47d5;
	--secondary-color: #00d2ff;
	--btn-color-on-primary: #f2f2f2;
	--text-color: #222;
	--text-color-on-light: #f2f2f2;
	--primary-color-hsl: 235deg 65% 53%;
	--shadow-color: 0deg 0% 65%;
	--shadow-elevation-low:
		0.3px 0.5px 0.7px hsl(var(--shadow-color) / 0.34),
		0.4px 0.8px 1px -1.2px hsl(var(--shadow-color) / 0.34),
		1px 2px 2.5px -2.5px hsl(var(--shadow-color) / 0.34);
	--shadow-elevation-medium:
		0.3px 0.5px 0.7px hsl(var(--shadow-color) / 0.36),
		0.8px 1.6px 2px -0.8px hsl(var(--shadow-color) / 0.36),
		2.1px 4.1px 5.2px -1.7px hsl(var(--shadow-color) / 0.36),
		5px 10px 12.6px -2.5px hsl(var(--shadow-color) / 0.36);
}

@media (prefers-color-scheme: dark) {
	:root {
		--background-color: #222;
		--primary-color: #9f94ea;
		--secondary-color: #a1e6ff;
		--text-color: #f2f2f2;
		--text-color-on-light: #222;
		--btn-color-on-primary: #222;
		--primary-color-hsl: 248 67% 75%;
	}
}

html {
	scroll-behavior: smooth;
}

body {
	margin: 0;
	font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
	font-optical-sizing: auto;
	font-weight: 500;
	font-style: normal;
	background-color: var(--background-color);
	color: var(--text-color);
}

h1 {
	font-size: calc(3rem + 2vw);
	font-weight: 900;
	background: linear-gradient(90deg, var(--secondary-color), var(--primary-color) 100%);
	background-clip: text;
	-webkit-background-clip: text;
	-moz-background-clip: text;
	-webkit-text-fill-color: transparent;
	-moz-text-fill-color: transparent;
}

header {
	padding: 24px 0;
	display: flex;
	justify-content: space-between;
	align-items: center;
}

footer {
	text-align: center;
	background-color: var(--primary-color);
	color: var(--btn-color-on-primary);
	padding: 24px;
}

main {
	text-align: center;
	min-height: 90vh;
	font-size: calc(1rem + 1vw);
	line-height: 1;
	font-weight: 500;
	color: var(--text-color)
}

.content {
	width: 90%;
	margin: 0 auto;
	max-width: 1200px;
}

.logo {
	font-size: calc(1rem + 1vw);
	font-weight: 900;
	text-transform: uppercase;
}

.logo a {
	color: var(--secondary-color);
	text-decoration: none;
}

.logo span {
	color: var(--primary-color)
}

header ul {
	display: flex;
	align-items: center;
	list-style: none;
	margin: 0;
	padding: 0;
	gap: 16px;
	font-size: calc(1rem + 0.5vw);
}

header ul a {
	text-decoration: none;
	color: var(--primary-color)
}

header ul a:hover:not(.btn) {
	text-decoration: underline;
}

.btn {
	display: inline-block;
	padding: 12px 24px;
	border-radius: 4px;
	background-color: var(--primary-color);
	color: var(--btn-color-on-primary);
	text-decoration: none;
	transition: all 0.3s ease-in-out;
	box-shadow: 0 0 0 0 hsl(var(--shadow-color) / 0.36);
	border: 0;
	font-size: calc(1rem + 0.5vw);
}

.btn.btn--small {
	padding: 8px 16px;
	font-size: calc(0.5rem + 0.5vw);
}

.btn:hover {
	background-color: var(--secondary-color);
	transform: translateY(-2px);
	box-shadow: var(--shadow-elevation-medium);
}

.meme-gallery {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
	gap: 16px;
	padding: 0 24px;
	list-style: none;
	margin: 64px 0;
}

.meme-gallery .gallery-item img {
	width: 100%;
	height: 100%;
	object-fit: cover;
}

.meme-gallery .gallery-item {
	height: 300px;
	position: relative;
	border-radius: 8px;
	overflow: hidden;
	box-shadow: var(--shadow-elevation-low);
}

.gallery-empty {
	padding: 48px 24px;
	text-align: center;
	color: var(--text-color);
	font-size: 1.1rem;
	list-style: none;
}

.meme-gallery .gallery-item::before {
	content: "";
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	background-color: transparent;
	transition: all 0.5s ease-in-out;
}

.meme-gallery .gallery-item:hover::before {
	background-color: hsl(var(--primary-color-hsl) / 0.5);
	backdrop-filter: blur(8px);
}

.meme-gallery .gallery-item div {
	opacity: 0;
	margin: 0;
	position: absolute;
	top: 50%;
	left: 0;
	transform: translateY(-40%);
	width: 100%;
	color: var(--text-color-on-light);
	padding: 24px 16px;
	font-size: 1.5rem;
	pointer-events: none;
	transition: all 0.5s ease-in-out;
}

.meme-gallery .gallery-item:hover div {
	opacity: 1;
	transform: translateY(-50%);
	pointer-events: initial;
}

.meme-gallery .gallery-item div a {
	color: var(--text-color-on-light);
	text-transform: uppercase;
	letter-spacing: 0.2px;
	font-size: 0.875rem;
}

@media (max-width: 900px) {
	.meme-gallery {
		grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
		padding: 0 16px;
		margin: 48px 0;
	}

	.meme-gallery .gallery-item {
		height: 250px;
	}

	header {
		flex-wrap: wrap;
		row-gap: 12px;
	}

	head, footer {
		padding-left: 16px;
		padding-right: 16px;
	}
}

@media (hover: none) {
	:root {
		--text-color-on-light: #f2f2f2;
	}

	.meme-gallery .gallery-item::before {
		background-color: transparent;
		background-image: linear-gradient(0deg, hsl(var(--primary-color-hsl) / 0.7), transparent 100%);
		backdrop-filter: blur(0);
	}

	.meme-gallery .gallery-item div {
		opacity: 1;
		transform: translateY(0);
		pointer-events: initial;
	}

	.meme-gallery .gallery-item div p {
		margin-block-end: 0;
	}
}

@media (hover: none) and (prefers-color-scheme: dark) {
	.meme-gallery .gallery-item::before {
		background-image: linear-gradient(0deg, hsl(0 0 0 / 0.8), transparent 100%);
	}
}

.skeleton {
	background-color: #ddd;
	background-image: linear-gradient(90deg, #ddd, #eee, #ddd);
	background-size: 200% 100%;
	background-repeat: no-repeat;
	display: inline-block;
	width: 100%;
	height: 200px;
	animation: loading 1.5s infinite;
}

.fade-in {
	animation: fadeIn 1s ease-in-out;
}

@keyframes loading {
	0% {
		background-position: -200% 0;
	}
	100% {
		background-position: 200% 0;
	}
}

@keyframes fadeIn {
	from {
		opacity: 0;
	}
	to {
		opacity: 1;
	}
}