/* ==========================================================================
   ARV Oil & Gas — About Page
   Design language: P&ID / blueprint spec-sheet, engineered restraint.
   ========================================================================== */

.arv-about {
	--arv-navy: #0b1e33;
	--arv-navy-soft: #142c47;
	--arv-steel: #1d3a57;
	--arv-charcoal: #12151a;
	--arv-fog: #f5f7f9;
	--arv-white: #ffffff;
	--arv-amber: #e8a33d;
	--arv-amber-soft: rgba(232, 163, 61, 0.16);
	--arv-ash: #6b7680;
	--arv-line: rgba(11, 30, 51, 0.12);
	--arv-line-light: rgba(255, 255, 255, 0.18);

	--arv-font-display: "Space Grotesk", "Segoe UI", sans-serif;
	--arv-font-body: "Inter", "Segoe UI", sans-serif;
	--arv-font-mono: "IBM Plex Mono", ui-monospace, Menlo, monospace;

	color: var(--arv-navy);
	background: var(--arv-white);
	font-family: var(--arv-font-body);
	overflow-x: clip;
}

.arv-about * {
	box-sizing: border-box;
}

.arv-about img {
	max-width: 100%;
	display: block;
}

.arv-container {
	width: min(1180px, 100% - 3rem);
	margin-inline: auto;
}

.arv-section {
	padding-block: clamp(4.5rem, 8vw, 7.5rem);
	position: relative;
}

.arv-eyebrow {
	display: inline-block;
	font-family: var(--arv-font-mono);
	font-size: 0.72rem;
	letter-spacing: 0.14em;
	text-transform: uppercase;
	color: var(--arv-amber);
	background: var(--arv-amber-soft);
	border: 1px solid rgba(232, 163, 61, 0.35);
	padding: 0.35em 0.75em;
	border-radius: 2px;
	margin-bottom: 1.1rem;
}

.arv-eyebrow--light {
	color: var(--arv-amber);
}

.arv-h2 {
	font-family: var(--arv-font-display);
	font-weight: 600;
	font-size: clamp(1.9rem, 3vw, 2.6rem);
	line-height: 1.15;
	margin: 0 0 1.1rem;
	color: var(--arv-navy);
	max-width: 20ch;
}

.arv-h2--light {
	color: var(--arv-white);
}

.arv-lead {
	font-size: 1.05rem;
	line-height: 1.7;
	color: var(--arv-ash);
	max-width: 46ch;
}

/* ==========================================================================
   Pipeline rail — signature scroll element (desktop only)
   ========================================================================== */

.arv-rail {
	position: fixed;
	left: clamp(14px, 2.4vw, 34px);
	top: 50%;
	transform: translateY(-50%);
	height: min(58vh, 560px);
	width: 2px;
	background: var(--arv-line);
	z-index: 40;
	display: none;
}

.arv-rail__fill {
	position: absolute;
	inset: 0 0 auto 0;
	width: 100%;
	height: 0%;
	background: linear-gradient(180deg, var(--arv-amber), #c97f22);
	box-shadow: 0 0 10px 1px rgba(232, 163, 61, 0.55);
	transition: height 0.15s linear;
}

.arv-rail__node {
	position: absolute;
	left: 50%;
	transform: translate(-50%, -50%);
	width: 9px;
	height: 9px;
	border-radius: 50%;
	background: var(--arv-white);
	border: 2px solid var(--arv-line);
	transition: border-color 0.3s ease, background 0.3s ease, box-shadow 0.3s ease;
}

.arv-rail__node.is-active {
	border-color: var(--arv-amber);
	background: var(--arv-amber);
	box-shadow: 0 0 0 4px var(--arv-amber-soft);
}

.arv-rail__node[data-node="01"] { top: 0%; }
.arv-rail__node[data-node="02"] { top: 25%; }
.arv-rail__node[data-node="03"] { top: 50%; }
.arv-rail__node[data-node="04"] { top: 75%; }
.arv-rail__node[data-node="05"] { top: 100%; }

@media (min-width: 1100px) {
	.arv-rail {
		display: block;
	}
}

/* ==========================================================================
   Hero
   ========================================================================== */

.arv-hero {
	padding: clamp(1rem, 2.5vw, 2rem);
	padding-top: clamp(1.5rem, 3vw, 2.5rem);
}

.arv-hero__frame {
	position: relative;
	isolation: isolate;
	border-radius: 6px;
	overflow: hidden;
	min-height: clamp(420px, 72vh, 760px);
	background: var(--arv-navy);
}

.arv-hero__img {
	position: absolute;
	inset: 0;
	width: 100%;
	height: 100%;
	object-fit: cover;
	transform: scale(1.06);
	animation: arv-hero-settle 1.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes arv-hero-settle {
	to {
		transform: scale(1);
	}
}

.arv-hero__overlay {
	position: absolute;
	inset: 0;
	background: linear-gradient(
		180deg,
		rgba(11, 30, 51, 0.35) 0%,
		rgba(11, 30, 51, 0.35) 45%,
		rgba(11, 30, 51, 0.92) 100%
	);
}

.arv-hero__scan {
	position: absolute;
	inset: 0;
	pointer-events: none;
	background: linear-gradient(
		180deg,
		transparent 0%,
		rgba(232, 163, 61, 0.16) 48%,
		transparent 100%
	);
	transform: translateY(-100%);
	animation: arv-scan 2.6s ease-out 0.3s 1 forwards;
}

@keyframes arv-scan {
	0% { transform: translateY(-100%); }
	100% { transform: translateY(100%); }
}

.arv-hero__corner {
	position: absolute;
	width: 26px;
	height: 26px;
	border: 2px solid var(--arv-line-light);
	z-index: 2;
	opacity: 0;
	animation: arv-fade-in 0.6s ease 1.1s forwards;
}

.arv-hero__corner--tl { top: 18px; left: 18px; border-right: none; border-bottom: none; }
.arv-hero__corner--tr { top: 18px; right: 18px; border-left: none; border-bottom: none; }
.arv-hero__corner--bl { bottom: 18px; left: 18px; border-right: none; border-top: none; }
.arv-hero__corner--br { bottom: 18px; right: 18px; border-left: none; border-top: none; }

@keyframes arv-fade-in {
	to { opacity: 1; }
}

.arv-hero__content {
	position: relative;
	z-index: 3;
	height: 100%;
	min-height: inherit;
	display: flex;
	flex-direction: column;
	justify-content: flex-end;
	padding: clamp(1.75rem, 4vw, 3.5rem);
}

.arv-hero__title {
	font-family: var(--arv-font-display);
	color: var(--arv-white);
	font-weight: 600;
	font-size: clamp(2.6rem, 7vw, 5.2rem);
	line-height: 0.98;
	letter-spacing: -0.01em;
	margin: 0;
	opacity: 0;
	transform: translateY(18px);
	animation: arv-rise 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.5s forwards;
}

@keyframes arv-rise {
	to { opacity: 1; transform: translateY(0); }
}

.arv-hero .arv-eyebrow {
	opacity: 0;
	transform: translateY(10px);
	animation: arv-rise 0.7s cubic-bezier(0.16, 1, 0.3, 1) 0.25s forwards;
}

/* ==========================================================================
   Why choose us — spec list
   ========================================================================== */

.arv-why__grid {
	display: grid;
	grid-template-columns: 1fr;
	gap: 2.5rem;
}

.arv-spec-list {
	list-style: none;
	margin: 0;
	padding: 0;
	border-top: 1px solid var(--arv-line);
}

.arv-spec-list__item {
	display: flex;
	align-items: baseline;
	gap: 1.25rem;
	padding: 1.05rem 0.25rem;
	border-bottom: 1px solid var(--arv-line);
	transition: background 0.25s ease, padding-left 0.25s ease;
}

.arv-spec-list__item:hover {
	background: var(--arv-fog);
	padding-left: 0.75rem;
}

.arv-spec-list__index {
	font-family: var(--arv-font-mono);
	font-size: 0.85rem;
	color: var(--arv-amber);
	flex-shrink: 0;
}

.arv-spec-list__label {
	font-family: var(--arv-font-display);
	font-size: 1.15rem;
	font-weight: 500;
	color: var(--arv-navy);
}

@media (min-width: 860px) {
	.arv-why__grid {
		grid-template-columns: 0.9fr 1.1fr;
		align-items: start;
		gap: 4rem;
	}
}

/* ==========================================================================
   Experience
   ========================================================================== */

.arv-experience {
	background: var(--arv-fog);
}

.arv-experience__grid {
	display: grid;
	grid-template-columns: 1fr;
	gap: 2rem;
}

.arv-experience__copy p {
	font-size: 1.02rem;
	line-height: 1.75;
	color: var(--arv-steel);
	margin: 0 0 1.25rem;
	max-width: 62ch;
}

.arv-experience__copy p:last-child {
	margin-bottom: 0;
}

@media (min-width: 860px) {
	.arv-experience__grid {
		grid-template-columns: 0.8fr 1.2fr;
		gap: 4rem;
	}
}

/* ==========================================================================
   Testimonials
   ========================================================================== */

.arv-testimonials {
	background: var(--arv-charcoal);
	padding-block: clamp(4.5rem, 8vw, 7.5rem);
	color: var(--arv-white);
}

.arv-testimonials__head {
	text-align: center;
	display: flex;
	flex-direction: column;
	align-items: center;
	margin-bottom: 3rem;
}

.arv-testimonials__mark {
	filter: brightness(0) invert(1);
	opacity: 0.85;
	margin-bottom: 1.25rem;
}

.arv-testimonials__head .arv-h2 {
	max-width: 26ch;
}

.arv-testimonials__grid {
	display: grid;
	grid-template-columns: 1fr;
	gap: 1.5rem;
}

.arv-testimonial {
	margin: 0;
	padding: 2rem;
	border: 1px solid var(--arv-line-light);
	border-radius: 4px;
	background: rgba(255, 255, 255, 0.02);
	transition: border-color 0.3s ease, transform 0.3s ease;
}

.arv-testimonial:hover {
	border-color: var(--arv-amber);
	transform: translateY(-4px);
}

.arv-testimonial__stars {
	color: var(--arv-amber);
	letter-spacing: 0.15em;
	font-size: 0.9rem;
	margin-bottom: 1rem;
}

.arv-testimonial__quote {
	margin: 0 0 1.5rem;
	font-size: 0.98rem;
	line-height: 1.7;
	color: rgba(255, 255, 255, 0.82);
}

.arv-testimonial__author {
	display: flex;
	flex-direction: column;
	gap: 0.15rem;
	padding-top: 1rem;
	border-top: 1px solid var(--arv-line-light);
}

.arv-testimonial__name {
	font-family: var(--arv-font-display);
	font-weight: 600;
	font-size: 0.95rem;
}

.arv-testimonial__role {
	font-family: var(--arv-font-mono);
	font-size: 0.75rem;
	letter-spacing: 0.06em;
	color: var(--arv-amber);
	text-transform: uppercase;
}

@media (min-width: 860px) {
	.arv-testimonials__grid {
		grid-template-columns: repeat(3, 1fr);
	}
}

/* ==========================================================================
   Mission / Vision / Sustainability
   ========================================================================== */

.arv-pillars__grid {
	display: grid;
	grid-template-columns: 1fr;
	gap: 3rem;
}

.arv-pillars__copy {
	display: flex;
	flex-direction: column;
	gap: 2.75rem;
}

.arv-pillar p {
	color: var(--arv-ash);
	line-height: 1.7;
	max-width: 50ch;
	margin: 0;
}

.arv-pillars__media {
	position: relative;
	border-radius: 6px;
	overflow: hidden;
}

.arv-pillars__media img {
	width: 100%;
	height: 100%;
	object-fit: cover;
}

@media (min-width: 960px) {
	.arv-pillars__grid {
		grid-template-columns: 1fr 1fr;
		gap: 4rem;
		align-items: start;
	}

	.arv-pillars__media {
		position: sticky;
		top: 6rem;
		aspect-ratio: 4 / 5;
	}
}

/* ==========================================================================
   Certifications strip
   ========================================================================== */

.arv-certs {
	padding-block: 2.5rem 4rem;
}

.arv-certs__row {
	display: flex;
	flex-wrap: wrap;
	gap: 1rem;
	justify-content: center;
	border-top: 1px solid var(--arv-line);
	padding-top: 2.5rem;
}

.arv-cert-badge {
	display: inline-flex;
	align-items: center;
	gap: 0.6rem;
	font-family: var(--arv-font-mono);
	font-size: 0.78rem;
	letter-spacing: 0.08em;
	color: var(--arv-steel);
	padding: 0.5em 1em;
	border: 1px solid var(--arv-line);
	border-radius: 999px;
}

.arv-cert-badge__ring {
	width: 8px;
	height: 8px;
	border-radius: 50%;
	border: 2px solid var(--arv-amber);
}

/* ==========================================================================
   Scroll reveal
   ========================================================================== */

.arv-reveal {
	opacity: 0;
	transform: translateY(24px);
	transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.arv-reveal.is-visible {
	opacity: 1;
	transform: translateY(0);
}

/* ==========================================================================
   Accessibility
   ========================================================================== */

.arv-about a:focus-visible,
.arv-about button:focus-visible {
	outline: 2px solid var(--arv-amber);
	outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
	.arv-about * {
		animation-duration: 0.001ms !important;
		animation-iteration-count: 1 !important;
		transition-duration: 0.001ms !important;
	}

	.arv-reveal {
		opacity: 1;
		transform: none;
	}
}