* {
	box-sizing: border-box;
}

:root {
	--bg: #fdfdfd;
	--ink: #111111;
	--yellow: #ffe45c;
	--cyan: #6ee7ff;
	--pink: #ff6ea8;
	--paper: #fff8ec;
	--shadow: 10px 10px 0 #111111;
	--border: 4px solid #111111;
}

html {
	scroll-behavior: smooth;
}

body {
	margin: 0;
	color: var(--ink);
	background:
		radial-gradient(circle at top left, rgba(255, 228, 92, 0.55), transparent 28%),
		radial-gradient(circle at top right, rgba(110, 231, 255, 0.45), transparent 25%),
		linear-gradient(180deg, #fffdf7 0%, #f8f3e8 100%);
	font-family: "Space Grotesk", system-ui, sans-serif;
}

a {
	color: inherit;
	text-decoration: none;
}

button,
a.button {
	font: inherit;
}

.shell {
	width: min(1120px, calc(100% - 32px));
	margin: 0 auto;
}

.noise {
	position: fixed;
	inset: 0;
	pointer-events: none;
	opacity: 0.08;
	background-image: linear-gradient(rgba(0, 0, 0, 0.08) 1px, transparent 1px), linear-gradient(90deg, rgba(0, 0, 0, 0.08) 1px, transparent 1px);
	background-size: 18px 18px;
	mix-blend-mode: multiply;
}

.hero {
	padding: 24px 0 48px;
}

.topbar {
	display: flex;
	justify-content: space-between;
	align-items: center;
	gap: 16px;
	margin-bottom: 48px;
}

.brand {
	padding: 10px 14px;
	border: var(--border);
	box-shadow: var(--shadow);
	background: var(--bg);
	font-family: "Space Mono", monospace;
	font-weight: 700;
	text-transform: uppercase;
	letter-spacing: 0.08em;
}

.topbar-actions {
	display: flex;
	flex-wrap: wrap;
	gap: 14px;
	font-weight: 700;
}

.topbar-actions a,
.footer a,
.button {
	transition: transform 140ms ease, box-shadow 140ms ease, background-color 140ms ease;
}

.topbar-actions a:hover,
.footer a:hover,
.button:hover,
.cell:hover {
	transform: translate(-2px, -2px);
}

.hero-grid,
.split-section {
	display: grid;
	grid-template-columns: 1.15fr 0.85fr;
	gap: 28px;
}

.hero-copy,
.hero-panel,
.panel,
.feature-card,
.status-card,
.board,
.footer {
	border: var(--border);
	box-shadow: var(--shadow);
	background: var(--bg);
}

.hero-copy,
.hero-panel,
.panel,
.feature-card {
	padding: 28px;
}

.eyebrow {
	display: inline-block;
	margin-bottom: 14px;
	font-family: "Space Mono", monospace;
	font-size: 0.84rem;
	font-weight: 700;
	text-transform: uppercase;
	letter-spacing: 0.12em;
}

h1,
h2,
h3,
p {
	margin: 0;
}

h1 {
	max-width: 9ch;
	font-size: clamp(3.6rem, 8vw, 7rem);
	line-height: 0.9;
	letter-spacing: -0.06em;
	text-transform: uppercase;
}

h2 {
	font-size: clamp(2rem, 4vw, 3rem);
	line-height: 0.95;
	text-transform: uppercase;
}

h3 {
	margin-bottom: 10px;
	font-size: 1.3rem;
	text-transform: uppercase;
}

.hero-copy p,
.feature-card p,
.side-panel li,
.footer p {
	font-size: 1.05rem;
	line-height: 1.55;
}

.hero-copy p {
	max-width: 42ch;
	margin-top: 18px;
}

.hero-actions {
	display: flex;
	flex-wrap: wrap;
	gap: 14px;
	margin: 26px 0 30px;
}

.button {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	min-height: 54px;
	padding: 0 18px;
	border: var(--border);
	box-shadow: 6px 6px 0 #111111;
	font-weight: 800;
	text-transform: uppercase;
	letter-spacing: 0.05em;
}

.button-primary {
	background: var(--yellow);
}

.button-secondary {
	background: var(--cyan);
}

.button.block {
	width: 100%;
}

.stats {
	display: grid;
	grid-template-columns: repeat(3, minmax(0, 1fr));
	gap: 12px;
	padding: 0;
	margin: 0;
	list-style: none;
}

.stats li,
.mini-row,
.leaderboard-row {
	border: 3px solid #111111;
	background: #fffdf4;
}

.stats li {
	padding: 14px;
}

.stats strong,
.mini-row strong {
	display: block;
	font-family: "Space Mono", monospace;
	font-size: 1.4rem;
}

.stats span,
.mini-row span,
.leaderboard-row em {
	display: block;
	margin-top: 6px;
	font-size: 0.9rem;
	opacity: 0.8;
}

.hero-panel {
	display: grid;
	gap: 16px;
	align-content: start;
}

.status-card,
.mini-row {
	display: flex;
	justify-content: space-between;
	align-items: center;
	padding: 16px 18px;
}

.status-card span,
.mini-row span {
	font-family: "Space Mono", monospace;
	font-size: 0.85rem;
	text-transform: uppercase;
}

.status-card strong,
.mini-row strong {
	font-size: 1.8rem;
}

.board {
	display: grid;
	grid-template-columns: repeat(3, minmax(0, 1fr));
	gap: 12px;
	padding: 12px;
}

.cell {
	aspect-ratio: 1;
	border: 4px solid #111111;
	background: #fef8e5;
	box-shadow: 5px 5px 0 #111111;
	font-size: clamp(2.4rem, 4vw, 3.5rem);
	font-weight: 800;
	cursor: pointer;
}

.cell.x {
	background: var(--yellow);
}

.cell.o {
	background: var(--cyan);
}

.pulse {
	animation: pulse 1.8s ease-in-out infinite;
}

.section {
	padding-bottom: 34px;
}

.section-heading {
	margin-bottom: 18px;
}

.cards-grid {
	display: grid;
	grid-template-columns: repeat(3, minmax(0, 1fr));
	gap: 20px;
}

.feature-card {
	min-height: 180px;
}

.accent-yellow {
	background: linear-gradient(180deg, rgba(255, 228, 92, 0.75), #fffdf4);
}

.accent-cyan {
	background: linear-gradient(180deg, rgba(110, 231, 255, 0.75), #fffdf4);
}

.accent-pink {
	background: linear-gradient(180deg, rgba(255, 110, 168, 0.75), #fffdf4);
}

.split-section {
	align-items: start;
}

.large-panel {
	min-height: 100%;
}

.leaderboard-list {
	display: grid;
	gap: 12px;
	margin-top: 20px;
}

.leaderboard-row {
	display: grid;
	grid-template-columns: 60px 1fr auto;
	gap: 12px;
	align-items: center;
	padding: 14px 16px;
}

.leaderboard-row span {
	font-family: "Space Mono", monospace;
	font-size: 1rem;
	font-weight: 700;
}

.checklist {
	display: grid;
	gap: 14px;
	padding-left: 20px;
	margin: 18px 0 24px;
}

.checklist li::marker {
	color: #111111;
}

.footer {
	display: flex;
	justify-content: space-between;
	align-items: center;
	gap: 16px;
	margin: 12px auto 32px;
	padding: 18px 22px;
}

@keyframes pulse {
	0%,
	100% {
		transform: scale(1);
	}

	50% {
		transform: scale(1.03);
	}
}

@media (max-width: 920px) {
	.hero-grid,
	.split-section,
	.cards-grid {
		grid-template-columns: 1fr;
	}

	.stats {
		grid-template-columns: 1fr;
	}

	.footer,
	.topbar {
		flex-direction: column;
		align-items: flex-start;
	}
}

@media (max-width: 640px) {
	.shell {
		width: min(100% - 20px, 1120px);
	}

	.hero-copy,
	.hero-panel,
	.panel,
	.feature-card {
		padding: 20px;
	}

	h1 {
		font-size: clamp(2.9rem, 18vw, 4.4rem);
	}

	.leaderboard-row {
		grid-template-columns: 44px 1fr;
	}

	.leaderboard-row em {
		grid-column: 2;
	}
}