/******************************************************************************
 * /features — pure-CSS 3D parallax across three acts.
 *
 * Technique: <main class="parallax"> establishes a perspective scroll
 * container. Each <section class="parallax-act"> is a stacking context with
 * absolutely-positioned .parallax-layer children. Each layer is pushed back
 * in Z by `--depth * --perspective` and scaled up by `--depth + 1` to
 * compensate, so it still fills the viewport but drifts slower than the
 * front layer during scroll. Zero JS drives the parallax — the browser's
 * native 3D projection during scroll does the work.
 *
 * Live <agent-3d> elements live on the front-most layer of each act and
 * lazy-boot via IntersectionObserver in features.js.
 *
 * Honors prefers-reduced-motion (collapses to flat) and narrow viewports
 * (single-column flat layout, parallax disabled).
 ******************************************************************************/

:root {
	--features-perspective: 2.4rem;
	--features-act-height: 210vh;
	--features-content-pad: clamp(1rem, 4vw, 3rem);
	--features-bg: #06070b;
	--features-fg: #f1efe9;
	--features-gold: #ffd76a;
	--features-violet: #a78bfa;
	--features-mint: #6ee7b7;
	--features-cyan: #67e8f9;
}

/* ── Page shell ─────────────────────────────────────────────────────────── */

.features-parallax-page {
	background: var(--features-bg);
	color: var(--features-fg);
	margin: 0;
	overflow: hidden;
	height: 100vh;
}

.features-parallax-page header {
	position: fixed;
	inset: 0 0 auto 0;
	z-index: 50;
	background: linear-gradient(to bottom, rgba(6, 7, 11, 0.85) 0%, rgba(6, 7, 11, 0) 100%);
	backdrop-filter: blur(8px);
	-webkit-backdrop-filter: blur(8px);
}

/* ── The scroll container — establishes perspective ─────────────────────── */

.parallax {
	position: relative;
	height: 100vh;
	width: 100vw;
	overflow-x: hidden;
	overflow-y: auto;
	overscroll-behavior-y: none;
	perspective: var(--features-perspective);
	perspective-origin: 50% 0%;
	scroll-behavior: smooth;
}

/* Hide WebKit scrollbar without affecting scroll behavior. */
.parallax::-webkit-scrollbar {
	width: 0;
	height: 0;
}

.parallax {
	scrollbar-width: none;
}

/* ── Each act: a perspective-aware stacking context ─────────────────────── */

.parallax-act {
	position: relative;
	display: block;
	height: var(--features-act-height);
	transform-style: preserve-3d;
	overflow: hidden;
	isolation: isolate;
}

.parallax-act + .parallax-act {
	border-top: 1px solid rgba(255, 255, 255, 0.04);
}

/* ── Layers: pushed back in Z, scaled up to compensate ──────────────────── */

.parallax-layer {
	position: absolute;
	inset: 0;
	width: 100%;
	height: 100%;
	pointer-events: none;
	transform-origin: 50% 50%;
	transform: translateZ(calc(var(--features-perspective) * var(--depth) * -1))
		scale(calc(var(--depth) + 1));
	z-index: calc(10 - var(--depth, 0));
}

.parallax-layer--front {
	pointer-events: auto;
}

/* ── Star field canvas ───────────────────────────────────────────────────── */

.layer-stars-canvas {
	position: absolute;
	left: 0;
	top: 0;
	width: 100%;
	height: 200%; /* drawn double-tall so drift animation loops seamlessly */
	pointer-events: none;
	animation: star-drift 120s linear infinite;
}

@keyframes star-drift {
	from { transform: translateY(0); }
	to   { transform: translateY(-50%); }
}

/* ── Foreground vignette layer (depth 0.5 — fastest moving, creates depth) ── */

.layer-vignette {
	position: absolute;
	inset: 0;
	background: radial-gradient(ellipse at 50% 50%, transparent 35%, rgba(6, 7, 11, 0.72) 100%);
	pointer-events: none;
}

/* ── Act warp transition zone ───────────────────────────────────────────── */

.act-warp {
	position: absolute;
	top: 0;
	left: 0;
	right: 0;
	height: 28vh;
	pointer-events: none;
	z-index: 25;
}

.act-warp--gold {
	background: linear-gradient(to bottom, rgba(6, 7, 11, 1) 0%, rgba(255, 215, 106, 0.04) 60%, transparent 100%);
}

.act-warp--violet {
	background: linear-gradient(to bottom, rgba(6, 7, 11, 1) 0%, rgba(167, 139, 250, 0.04) 60%, transparent 100%);
}

.act-warp--mint {
	background: linear-gradient(to bottom, rgba(6, 7, 11, 1) 0%, rgba(110, 231, 183, 0.04) 60%, transparent 100%);
}

/* ── Section progress dots (fixed right rail) ───────────────────────────── */

.act-nav {
	position: fixed;
	right: 1.5rem;
	top: 50%;
	transform: translateY(-50%);
	z-index: 100;
	display: flex;
	flex-direction: column;
	gap: 0.75rem;
}

.act-dot {
	display: block;
	width: 7px;
	height: 7px;
	border-radius: 50%;
	background: rgba(255, 255, 255, 0.22);
	border: 1px solid rgba(255, 255, 255, 0.14);
	transition: background 0.3s ease, transform 0.3s ease, border-color 0.3s ease;
	text-decoration: none;
}

.act-dot[data-active='true'] {
	background: #fff;
	border-color: #fff;
	transform: scale(1.35);
}

.parallax-act[data-act='1'] ~ * .act-dot[data-act='1'],
.act-dot[data-act='1'][data-active='true'] {
	background: var(--features-gold);
	border-color: var(--features-gold);
}

.act-dot[data-act='2'][data-active='true'] {
	background: var(--features-violet);
	border-color: var(--features-violet);
}

.act-dot[data-act='3'][data-active='true'] {
	background: var(--features-mint);
	border-color: var(--features-mint);
}

/* ── Perspective grid SVG (Act 1 mid layer) ─────────────────────────────── */

.layer-perspective-grid {
	position: absolute;
	inset: 0;
	width: 100%;
	height: 100%;
}

/* ── Background layer styles (pure CSS, no images) ──────────────────────── */

.layer-bg {
	position: absolute;
	inset: 0;
}

.layer-bg--nebula {
	background:
		radial-gradient(ellipse at 20% 30%, rgba(255, 215, 106, 0.12) 0%, transparent 55%),
		radial-gradient(ellipse at 80% 70%, rgba(103, 232, 249, 0.1) 0%, transparent 55%),
		linear-gradient(180deg, #0a0c12 0%, #06070b 100%);
}

.layer-bg--violet {
	background:
		radial-gradient(ellipse at 70% 30%, rgba(167, 139, 250, 0.18) 0%, transparent 55%),
		radial-gradient(ellipse at 25% 75%, rgba(236, 72, 153, 0.08) 0%, transparent 60%),
		linear-gradient(180deg, #0c0915 0%, #06070b 100%);
}

.layer-bg--mint {
	background:
		radial-gradient(ellipse at 30% 40%, rgba(110, 231, 183, 0.14) 0%, transparent 55%),
		radial-gradient(ellipse at 80% 80%, rgba(255, 215, 106, 0.08) 0%, transparent 55%),
		linear-gradient(180deg, #06120e 0%, #06070b 100%);
}

/* ── Mid-depth: grid lines ──────────────────────────────────────────────── */

.layer-grid {
	position: absolute;
	inset: 0;
	background-image:
		linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
		linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
	background-size: 64px 64px;
	mask-image: radial-gradient(ellipse at center, #000 30%, transparent 70%);
	-webkit-mask-image: radial-gradient(ellipse at center, #000 30%, transparent 70%);
}

/* ── Mid-depth: floating glow orbs ──────────────────────────────────────── */

.layer-orb {
	position: absolute;
	width: clamp(400px, 55vw, 800px);
	aspect-ratio: 1;
	border-radius: 50%;
	filter: blur(80px);
	opacity: 0.65;
}

.layer-orb--gold {
	background: radial-gradient(circle, var(--features-gold), transparent 70%);
	top: 12%;
	left: 8%;
}

.layer-orb--cyan {
	background: radial-gradient(circle, var(--features-cyan), transparent 70%);
	bottom: 14%;
	right: 6%;
}

.layer-orb--violet {
	background: radial-gradient(circle, var(--features-violet), transparent 70%);
	top: 20%;
	right: 10%;
}

.layer-orb--mint {
	background: radial-gradient(circle, var(--features-mint), transparent 70%);
	top: 18%;
	left: 12%;
}

/* ── Mid-depth: emotion glyphs (Act 2) ──────────────────────────────────── */

.layer-glyphs {
	position: absolute;
	inset: 0;
	width: 100%;
	height: 100%;
}

.layer-glyphs .glyph {
	font-family: 'Space Grotesk', 'Inter', sans-serif;
	font-size: 48px;
	font-weight: 600;
	fill: rgba(167, 139, 250, 0.18);
	letter-spacing: 0.04em;
}

.layer-glyphs .glyph--big {
	font-size: 96px;
	fill: rgba(255, 255, 255, 0.08);
}

/* ── Mid-depth: chain ribbon (Act 3, populated by features.js) ──────────── */

.layer-chains {
	position: absolute;
	inset: 0;
	display: flex;
	flex-wrap: wrap;
	align-content: center;
	justify-content: center;
	gap: 1.5rem 2.5rem;
	padding: 6rem 4rem;
}

.layer-chains .chain-pill {
	font-family: 'Space Grotesk', sans-serif;
	font-size: 18px;
	font-weight: 600;
	letter-spacing: 0.08em;
	color: rgba(110, 231, 183, 0.32);
	text-transform: uppercase;
	border: 1px solid rgba(110, 231, 183, 0.2);
	border-radius: 999px;
	padding: 0.4rem 1rem;
	white-space: nowrap;
}

/* ── Ghost model-viewer (depth 3 background figures) ────────────────────── */

.layer-ghost-model {
	position: absolute;
	inset: 0;
	width: 100%;
	height: 100%;
	background: transparent;
	--poster-color: transparent;
	opacity: 0.13;
	filter: blur(0.6px);
	pointer-events: none;
}

.layer-ghost-model--violet {
	filter: blur(0.6px) hue-rotate(240deg) saturate(0.4);
}

.layer-ghost-model--mint {
	filter: blur(0.6px) hue-rotate(130deg) saturate(0.4);
}

/* ── Front-layer stage (where the live agent lives) ─────────────────────── */

.act-stage {
	position: absolute;
	inset: 0;
	display: flex;
	align-items: center;
	justify-content: center;
	pointer-events: none;
}

.act-agent {
	display: block;
	width: clamp(280px, 32vw, 480px);
	aspect-ratio: 4 / 5;
	pointer-events: auto;
	filter: drop-shadow(0 24px 48px rgba(0, 0, 0, 0.5));
	opacity: 0;
	transition: opacity 0.6s ease 0.1s;
}

.act-agent[data-ready='true'] {
	opacity: 1;
}

/* Passport tag (Act 3) */
.act-passport {
	position: absolute;
	bottom: 16%;
	left: 50%;
	transform: translateX(-50%);
	display: inline-flex;
	align-items: center;
	gap: 0.5rem;
	padding: 0.4rem 0.9rem;
	background: rgba(6, 7, 11, 0.7);
	border: 1px solid rgba(110, 231, 183, 0.4);
	border-radius: 999px;
	color: var(--features-mint);
	font-family: 'JetBrains Mono', monospace;
	font-size: 13px;
	letter-spacing: 0.04em;
	pointer-events: auto;
	backdrop-filter: blur(6px);
	-webkit-backdrop-filter: blur(6px);
}

.act-passport[hidden] {
	display: none;
}

.passport-label {
	color: rgba(255, 255, 255, 0.55);
}

.passport-divider {
	opacity: 0.4;
}

/* ── Act content (sticky-positioned text overlay) ───────────────────────── */

.act-content {
	position: sticky;
	top: 0;
	height: 100vh;
	margin-bottom: -100vh;
	z-index: 20;
	display: flex;
	flex-direction: column;
	justify-content: flex-end;
	padding: 0 var(--features-content-pad) clamp(2rem, 5vh, 4rem);
	pointer-events: none;
	max-width: 720px;
}

.act-content > * {
	pointer-events: auto;
}

.act-eyebrow {
	display: inline-flex;
	align-items: center;
	gap: 0.5rem;
	font-family: 'Space Grotesk', sans-serif;
	font-size: 13px;
	font-weight: 500;
	letter-spacing: 0.12em;
	text-transform: uppercase;
	color: rgba(255, 255, 255, 0.65);
	margin-bottom: 1rem;
	width: fit-content;
}

.act-eyebrow-dot {
	width: 6px;
	height: 6px;
	border-radius: 50%;
	background: var(--features-gold);
	box-shadow: 0 0 12px var(--features-gold);
	animation: features-pulse 2.4s ease-in-out infinite;
}

.parallax-act--empathy .act-eyebrow-dot {
	background: var(--features-violet);
	box-shadow: 0 0 12px var(--features-violet);
}

.parallax-act--onchain .act-eyebrow-dot {
	background: var(--features-mint);
	box-shadow: 0 0 12px var(--features-mint);
}

@keyframes features-pulse {
	0%,
	100% {
		opacity: 1;
		transform: scale(1);
	}
	50% {
		opacity: 0.55;
		transform: scale(0.85);
	}
}

.act-content h2 {
	font-family: 'Space Grotesk', 'Inter', sans-serif;
	font-size: clamp(2rem, 5.5vw, 4rem);
	font-weight: 600;
	line-height: 1.05;
	letter-spacing: -0.02em;
	margin: 0 0 1rem;
	color: #fff;
	text-wrap: balance;
}

.act-content h2 em {
	font-style: italic;
	font-weight: 500;
	color: var(--features-gold);
}

.parallax-act--empathy h2 em {
	color: var(--features-violet);
}

.parallax-act--onchain h2 em {
	color: var(--features-mint);
}

.act-lede {
	font-size: clamp(1rem, 1.5vw, 1.2rem);
	line-height: 1.5;
	color: rgba(241, 239, 233, 0.78);
	max-width: 56ch;
	margin: 0 0 1.5rem;
	text-wrap: pretty;
}

/* ── Embed code block (Act 1) ───────────────────────────────────────────── */

.act-code {
	position: relative;
	background: rgba(0, 0, 0, 0.45);
	border: 1px solid rgba(255, 255, 255, 0.08);
	border-radius: 10px;
	padding: 1rem 1.2rem;
	margin: 0 0 1.5rem;
	font-family: 'JetBrains Mono', monospace;
	font-size: 13px;
	line-height: 1.55;
	color: rgba(241, 239, 233, 0.88);
	overflow-x: auto;
	max-width: 100%;
	backdrop-filter: blur(6px);
	-webkit-backdrop-filter: blur(6px);
}

.act-code pre {
	margin: 0;
	white-space: pre;
}

.act-code code {
	font: inherit;
}

.act-code .code-em {
	color: var(--features-gold);
}

.act-code-copy {
	position: absolute;
	top: 0.6rem;
	right: 0.6rem;
	background: rgba(255, 255, 255, 0.06);
	border: 1px solid rgba(255, 255, 255, 0.12);
	color: rgba(255, 255, 255, 0.78);
	font-family: 'Space Grotesk', sans-serif;
	font-size: 12px;
	letter-spacing: 0.08em;
	text-transform: uppercase;
	padding: 0.3rem 0.6rem;
	border-radius: 6px;
	cursor: pointer;
	transition:
		background 0.15s ease,
		color 0.15s ease;
}

.act-code-copy:hover,
.act-code-copy:focus-visible {
	background: rgba(255, 215, 106, 0.16);
	color: var(--features-gold);
	outline: none;
}

.act-code-copy[data-copied='true'] {
	color: var(--features-mint);
	border-color: var(--features-mint);
}

/* ── Emotion chips (Act 2) ──────────────────────────────────────────────── */

.emotion-chips {
	display: flex;
	flex-wrap: wrap;
	gap: 0.5rem;
	margin: 0 0 1.5rem;
}

.emotion-chip {
	display: inline-flex;
	align-items: center;
	gap: 0.4rem;
	padding: 0.5rem 0.9rem;
	background: rgba(255, 255, 255, 0.04);
	border: 1px solid rgba(167, 139, 250, 0.28);
	border-radius: 999px;
	color: rgba(241, 239, 233, 0.9);
	font: inherit;
	font-size: 14px;
	font-weight: 500;
	cursor: pointer;
	transition:
		background 0.15s ease,
		border-color 0.15s ease,
		transform 0.15s ease;
}

.emotion-chip:hover,
.emotion-chip:focus-visible {
	background: rgba(167, 139, 250, 0.16);
	border-color: var(--features-violet);
	outline: none;
}

.emotion-chip[data-active='true'] {
	background: rgba(167, 139, 250, 0.24);
	border-color: var(--features-violet);
	transform: scale(0.98);
}

.emotion-chip-glyph {
	color: var(--features-violet);
	font-weight: 700;
}

/* ── Stats (Act 3) ──────────────────────────────────────────────────────── */

.act-stats {
	display: grid;
	grid-template-columns: repeat(3, minmax(0, 1fr));
	gap: 1rem 2rem;
	margin: 0 0 1.5rem;
	padding: 0;
	max-width: 540px;
}

.act-stats > div {
	display: flex;
	flex-direction: column;
	gap: 0.25rem;
}

.act-stats dt {
	font-family: 'Space Grotesk', sans-serif;
	font-size: 11px;
	font-weight: 500;
	letter-spacing: 0.12em;
	text-transform: uppercase;
	color: rgba(255, 255, 255, 0.55);
}

.act-stats dd {
	font-family: 'Space Grotesk', sans-serif;
	font-size: clamp(1.1rem, 1.8vw, 1.5rem);
	font-weight: 600;
	color: var(--features-mint);
	margin: 0;
}

/* ── CTAs ───────────────────────────────────────────────────────────────── */

.act-cta {
	display: flex;
	flex-wrap: wrap;
	gap: 0.75rem;
}

.btn-primary,
.btn-ghost {
	display: inline-flex;
	align-items: center;
	gap: 0.5rem;
	padding: 0.85rem 1.4rem;
	border-radius: 10px;
	font-family: 'Space Grotesk', 'Inter', sans-serif;
	font-size: 15px;
	font-weight: 500;
	letter-spacing: 0.01em;
	text-decoration: none;
	transition:
		transform 0.15s ease,
		background 0.15s ease,
		border-color 0.15s ease;
}

.btn-primary {
	background: var(--features-gold);
	color: #1a1610;
	border: 1px solid var(--features-gold);
}

.parallax-act--empathy .btn-primary {
	background: var(--features-violet);
	color: #1a1530;
	border-color: var(--features-violet);
}

.parallax-act--onchain .btn-primary {
	background: var(--features-mint);
	color: #04201a;
	border-color: var(--features-mint);
}

.btn-primary:hover,
.btn-primary:focus-visible {
	transform: translateY(-1px);
	outline: none;
}

.btn-ghost {
	background: transparent;
	color: rgba(255, 255, 255, 0.85);
	border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-ghost:hover,
.btn-ghost:focus-visible {
	background: rgba(255, 255, 255, 0.06);
	border-color: rgba(255, 255, 255, 0.4);
	outline: none;
}

.btn-arrow {
	transition: transform 0.15s ease;
}

.btn-primary:hover .btn-arrow,
.btn-ghost:hover .btn-arrow {
	transform: translateX(2px);
}

/* ── Outro (flat) ───────────────────────────────────────────────────────── */

.features-outro {
	position: relative;
	background: var(--features-bg);
	color: var(--features-fg);
	padding: clamp(3rem, 8vh, 6rem) var(--features-content-pad) clamp(2rem, 5vh, 4rem);
	z-index: 30;
}

.features-outro h3 {
	font-family: 'Space Grotesk', sans-serif;
	font-size: clamp(1.6rem, 3.2vw, 2.4rem);
	font-weight: 600;
	letter-spacing: -0.01em;
	margin: 0 0 2rem;
	color: #fff;
}

.outro-grid {
	list-style: none;
	margin: 0 0 3rem;
	padding: 0;
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
	gap: 1.5rem;
	max-width: 1200px;
}

.outro-grid li {
	background: rgba(255, 255, 255, 0.025);
	border: 1px solid rgba(255, 255, 255, 0.06);
	border-radius: 12px;
	padding: 1.4rem 1.5rem;
}

.outro-grid h4 {
	font-family: 'Space Grotesk', sans-serif;
	font-size: 1.05rem;
	font-weight: 600;
	margin: 0 0 0.5rem;
	color: #fff;
}

.outro-grid p {
	font-size: 14px;
	line-height: 1.55;
	color: rgba(241, 239, 233, 0.7);
	margin: 0;
}

.outro-grid code {
	font-family: 'JetBrains Mono', monospace;
	font-size: 12px;
	color: var(--features-gold);
	background: rgba(255, 215, 106, 0.08);
	padding: 0.1rem 0.35rem;
	border-radius: 4px;
}

.features-footer {
	border-top: 1px solid rgba(255, 255, 255, 0.06);
	padding-top: 1.5rem;
	font-size: 13px;
	color: rgba(255, 255, 255, 0.5);
}

.features-footer a {
	color: rgba(255, 255, 255, 0.7);
	text-decoration: none;
	border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.features-footer a:hover {
	color: var(--features-gold);
	border-color: var(--features-gold);
}

/* ── Responsive: narrow viewports collapse to flat layout ───────────────── */

@media (max-width: 768px) {
	.act-nav { display: none; }

	.features-parallax-page {
		overflow: auto;
		height: auto;
	}

	.parallax {
		perspective: none;
		height: auto;
		overflow: visible;
		scroll-behavior: auto;
	}

	.parallax-act {
		height: auto;
		min-height: 100vh;
		padding: 7rem 0 2rem;
	}

	.parallax-layer {
		transform: none;
		position: absolute;
	}

	.parallax-layer--front {
		position: relative;
	}

	.act-stage {
		position: relative;
		height: 50vh;
		padding: 1rem;
	}

	.act-content {
		position: relative;
		height: auto;
		margin-bottom: 0;
		padding: 1.5rem var(--features-content-pad) 2rem;
	}

	.act-stats {
		grid-template-columns: repeat(2, minmax(0, 1fr));
	}
}

/* ── Reduced motion: disable parallax + animation, keep agents ──────────── */

@media (prefers-reduced-motion: reduce) {
	.features-parallax-page {
		overflow: auto;
		height: auto;
	}

	.parallax {
		perspective: none;
		height: auto;
		overflow: visible;
		scroll-behavior: auto;
	}

	.parallax-act {
		height: auto;
		min-height: 100vh;
		padding: 6rem 0 2rem;
	}

	.parallax-layer {
		transform: none;
	}

	.act-stage,
	.act-content {
		position: relative;
		height: auto;
		margin-bottom: 0;
	}

	.act-eyebrow-dot {
		animation: none;
	}

	.act-agent {
		opacity: 1;
		transition: none;
	}

	.layer-stars-canvas {
		display: none;
	}

	.act-nav { display: none; }

	.layer-stars-canvas {
		animation: none;
	}
}