* {
	margin: 0;
	padding: 0;
	box-sizing: border-box;
}

:root {
	--bg: #050505;
	--bg-card: #141414;
	--text: #f0f0f0;
	--text-muted: #888;
	--accent: #7c4de7;
	--accent-light: #a78bfa;
	--border: rgba(255, 255, 255, 0.1);
}

html {
	scroll-behavior: auto;
}

html.lenis,
html.lenis body {
	height: auto;
}

.lenis.lenis-smooth {
	scroll-behavior: auto !important;
}

body {
	background: var(--bg);
	color: var(--text);
	font-family: 'Space Grotesk', system-ui, sans-serif;
	overflow-x: hidden;
	-webkit-font-smoothing: antialiased;
	-moz-osx-font-smoothing: grayscale;
	line-height: 1.6;
}

::selection {
	background: var(--accent);
	color: var(--bg);
}

/* Container */
.container {
	max-width: 900px;
	margin: 0 auto;
	padding: 4rem 2rem;
}

/* Page Header */
.page-header {
	text-align: center;
	margin-bottom: 6rem;
	padding-top: 2rem;
}

.page-title {
	font-size: clamp(2rem, 6vw, 3.5rem);
	font-weight: 700;
	letter-spacing: -0.02em;
	margin-bottom: 0.5rem;
}

.page-subtitle {
	font-size: 1.125rem;
	color: var(--text-muted);
}

/* Example Sections */
.example {
	margin-bottom: 8rem;
	padding-bottom: 4rem;
	border-bottom: 1px solid var(--border);
}

.example:last-child {
	margin-bottom: 0;
	padding-bottom: 0;
	border-bottom: none;
}

.example-header {
	display: flex;
	align-items: center;
	gap: 1rem;
	margin-bottom: 2rem;
}

.example-number {
	font-family: 'Space Mono', monospace;
	font-size: 0.75rem;
	color: var(--accent);
	letter-spacing: 0.1em;
}

.example-title {
	font-size: 0.875rem;
	font-weight: 500;
	text-transform: uppercase;
	letter-spacing: 0.1em;
	color: var(--text-muted);
}

.example-content {
	padding-left: 2.5rem;
}

.example-instruction {
	font-size: 1rem;
	color: var(--text-muted);
	margin-bottom: 1.5rem;
}

/* Cards Layout */
.cards-row {
	display: flex;
	gap: 1.5rem;
	flex-wrap: wrap;
}

.cards-row--wide {
	gap: 1rem;
}

.cards-grid {
	display: grid;
	grid-template-columns: repeat(2, 1fr);
	gap: 1rem;
	max-width: 500px;
}

/* ============================================
   FLIP CARD CORE STYLES
   ============================================ */
.flip-card {
	width: 240px;
	height: 300px;
	perspective: 1200px;
	cursor: pointer;
}

.cards-grid .flip-card {
	width: 100%;
	height: 180px;
}

.flip-card-inner {
	position: relative;
	width: 100%;
	height: 100%;
	transition: transform 0.8s cubic-bezier(0.175, 0.885, 0.32, 1.275);
	transform-style: preserve-3d;
}

.flip-card.flipped .flip-card-inner {
	transform: rotateY(180deg);
}

.flip-card-front,
.flip-card-back {
	position: absolute;
	width: 100%;
	height: 100%;
	backface-visibility: hidden;
	-webkit-backface-visibility: hidden;
	border-radius: 16px;
	overflow: hidden;
	background: var(--bg-card);
	border: 1px solid var(--border);
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
	padding: 1.5rem;
	text-align: center;
	transition: box-shadow 0.4s ease, border-color 0.4s ease;
}

.flip-card-back {
	transform: rotateY(180deg);
	background: linear-gradient(145deg, #1a1a1a 0%, #0f0f0f 100%);
}

/* Hover/Active States - include focus-visible for keyboard users */
.flip-card:hover .flip-card-front,
.flip-card:focus-visible .flip-card-front,
.flip-card.flipped .flip-card-back {
	border-color: var(--accent);
	box-shadow: 0 8px 32px rgba(139, 92, 246, 0.15);
}

/* Focus ring for keyboard navigation */
.flip-card:focus-visible {
	outline: 2px solid var(--accent);
	outline-offset: 4px;
	border-radius: 16px;
}

/* Subtle lift on hover/focus (desktop only via JS) */
.flip-card:not(.flipped):hover .flip-card-inner,
.flip-card:not(.flipped):focus-visible .flip-card-inner {
	transform: translateY(-4px);
}

.flip-card.flipped:hover .flip-card-inner,
.flip-card.flipped:focus-visible .flip-card-inner {
	transform: translateY(-4px) rotateY(180deg);
}

/* ============================================
   CARD CONTENT STYLES
   ============================================ */

/* Icon */
.card-icon {
	width: 64px;
	height: 64px;
	display: flex;
	align-items: center;
	justify-content: center;
	margin-bottom: 1rem;
	color: var(--accent);
}

.card-icon.accent-purple { color: #8b5cf6; }
.card-icon.accent-blue { color: #3b82f6; }
.card-icon.accent-green { color: #10b981; }
.card-icon.accent-orange { color: #f59e0b; }

/* Card Text */
.flip-card h3 {
	font-size: 1.25rem;
	font-weight: 600;
	letter-spacing: -0.02em;
	margin-bottom: 0.5rem;
}

.cards-grid .flip-card h3 {
	font-size: 1rem;
	margin-bottom: 0.25rem;
}

.card-role {
	font-size: 0.75rem;
	font-family: 'Space Mono', monospace;
	text-transform: uppercase;
	letter-spacing: 0.1em;
	color: var(--accent);
}

.flip-card-back p {
	font-size: 0.9rem;
	color: var(--text-muted);
	line-height: 1.6;
	margin-bottom: 1rem;
}

.cards-grid .flip-card-back p {
	font-size: 0.8rem;
	margin-bottom: 0;
}

/* Card Button */
.card-btn {
	padding: 0.625rem 1.25rem;
	background: var(--accent);
	border: none;
	border-radius: 100px;
	font-family: inherit;
	font-size: 0.8rem;
	font-weight: 600;
	color: var(--text);
	cursor: pointer;
	transition: background 0.3s ease, transform 0.2s ease;
}

.card-btn:hover {
	background: var(--accent-light);
	transform: translateY(-2px);
}

.card-btn:focus-visible {
	outline: 2px solid var(--accent-light);
	outline-offset: 2px;
}

/* ============================================
   CONTENT VARIANT STYLES
   ============================================ */

/* Image Card */
.flip-card--image .flip-card-front {
	padding: 0;
}

.card-image {
	width: 100%;
	height: 100%;
	display: flex;
	align-items: flex-end;
	justify-content: flex-start;
	padding: 1rem;
}

.card-image-label {
	font-size: 0.7rem;
	font-family: 'Space Mono', monospace;
	text-transform: uppercase;
	letter-spacing: 0.1em;
	background: rgba(0, 0, 0, 0.5);
	padding: 0.35rem 0.75rem;
	border-radius: 4px;
	backdrop-filter: blur(8px);
}

/* Stats Card */
.flip-card--stats .flip-card-front {
	background: linear-gradient(145deg, var(--bg-card) 0%, #1a1a1a 100%);
}

.stat-value {
	font-size: 3rem;
	font-weight: 700;
	letter-spacing: -0.04em;
	color: var(--accent);
	line-height: 1;
	margin-bottom: 0.5rem;
}

.stat-label {
	font-size: 0.75rem;
	font-family: 'Space Mono', monospace;
	text-transform: uppercase;
	letter-spacing: 0.1em;
	color: var(--text-muted);
}

/* Icon-Heavy Card */
.flip-card--icon-heavy .flip-card-front {
	color: var(--accent);
}

.flip-card--icon-heavy .flip-card-front svg {
	opacity: 0.8;
	transition: opacity 0.3s ease, transform 0.3s ease;
}

.flip-card--icon-heavy:hover .flip-card-front svg {
	opacity: 1;
	transform: scale(1.05);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
	.container {
		padding: 2rem 1.5rem;
	}

	.page-header {
		margin-bottom: 4rem;
	}

	.example {
		margin-bottom: 5rem;
		padding-bottom: 3rem;
	}

	.example-content {
		padding-left: 0;
	}

	.cards-row {
		flex-direction: column;
		align-items: center;
	}

	.cards-row--wide {
		flex-direction: row;
		flex-wrap: wrap;
		justify-content: center;
	}

	.flip-card {
		width: 100%;
		max-width: 280px;
	}

	.cards-grid {
		grid-template-columns: 1fr;
		max-width: 280px;
		margin: 0 auto;
	}
}

@media (max-width: 480px) {
	.cards-row--wide .flip-card {
		width: 100%;
		max-width: 280px;
	}
}

/* ============================================
   REDUCED MOTION
   ============================================ */
@media (prefers-reduced-motion: reduce) {
	*,
	*::before,
	*::after {
		animation-duration: 0.01ms !important;
		transition-duration: 0.01ms !important;
	}

	.flip-card-inner {
		transition: none;
	}

	.flip-card.flipped .flip-card-inner {
		transform: rotateY(180deg);
	}
}