/* =========================================================
   Pishtazan-e Asr-e Kimia — theme stylesheet
   Palette derived from the brand mark:
   maroon #a13c2c · orange #e8582f · teal #6cc4c0 · teal-dark #1f6f6a
   ========================================================= */

:root {
	--pak-bg: #0d1414;
	--pak-bg-alt: #121c1c;
	--pak-surface: #17211f;
	--pak-border: rgba(255, 255, 255, 0.08);
	--pak-text: #eef4f2;
	--pak-text-dim: #9bb0ac;
	--pak-maroon: #a13c2c;
	--pak-orange: #e8582f;
	--pak-teal: #6cc4c0;
	--pak-teal-dark: #1f6f6a;
	--pak-radius: 18px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
	margin: 0;
	background: var(--pak-bg);
	color: var(--pak-text);
	line-height: 1.75;
	font-size: 16px;
}

body.lang-fa, body.lang-fa input, body.lang-fa textarea, body.lang-fa button {
	font-family: 'Vazirmatn', 'Tahoma', sans-serif;
}
body.lang-ar, body.lang-ar input, body.lang-ar textarea, body.lang-ar button {
	font-family: 'Cairo', 'Tahoma', sans-serif;
}
body.lang-en, body.lang-en input, body.lang-en textarea, body.lang-en button {
	font-family: 'Inter', -apple-system, sans-serif;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

:focus-visible {
	outline: 2px solid var(--pak-teal);
	outline-offset: 3px;
}

.pak-container {
	max-width: 1180px;
	margin: 0 auto;
	padding: 0 1.5rem;
}

h1, h2, h3 { font-weight: 800; margin: 0 0 0.6em; line-height: 1.3; }

/* ---------- Scroll reveal ---------- */
.pak-reveal {
	opacity: 0;
	transform: translateY(26px);
	transition: opacity 0.7s cubic-bezier(.16,.84,.44,1), transform 0.7s cubic-bezier(.16,.84,.44,1);
	will-change: opacity, transform;
}
.pak-reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
	.pak-reveal { opacity: 1; transform: none; transition: none; }
}

.pak-section-title {
	font-size: clamp(1.5rem, 3vw, 2.1rem);
	text-align: center;
	margin-bottom: 2.5rem;
	position: relative;
}
.pak-section-title::after {
	content: "";
	display: block;
	width: 56px;
	height: 4px;
	margin: 0.6em auto 0;
	border-radius: 4px;
	background: linear-gradient(90deg, var(--pak-orange), var(--pak-teal));
}

/* ---------- Buttons ---------- */
.pak-btn {
	display: inline-block;
	padding: 0.85em 1.9em;
	border-radius: 999px;
	font-weight: 700;
	font-size: 0.95rem;
	margin-inline-end: 0.75rem;
	margin-top: 0.5rem;
	transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
	border: 1px solid transparent;
	cursor: pointer;
}
.pak-btn--primary {
	background: linear-gradient(135deg, var(--pak-orange), var(--pak-maroon));
	color: #fff;
	box-shadow: 0 8px 24px -8px rgba(232, 88, 47, 0.6);
}
.pak-btn--primary:hover { transform: translateY(-2px); box-shadow: 0 12px 28px -8px rgba(232, 88, 47, 0.75); }
.pak-btn--ghost {
	background: transparent;
	border-color: var(--pak-border);
	color: var(--pak-text);
}
.pak-btn--ghost:hover { border-color: var(--pak-teal); color: var(--pak-teal); }

/* ---------- Header ---------- */
.pak-header {
	position: sticky;
	top: 0;
	z-index: 50;
	background: rgba(13, 20, 20, 0.85);
	backdrop-filter: blur(10px);
	border-bottom: 1px solid var(--pak-border);
}
.pak-header__inner {
	display: flex;
	align-items: center;
	gap: 1.5rem;
	padding: 0.85rem 1.5rem;
}
.pak-brand {
	display: flex;
	align-items: center;
	gap: 0.6rem;
	font-weight: 800;
	font-size: 1.05rem;
	white-space: nowrap;
}
.pak-brand__logo { width: 38px; height: 38px; object-fit: contain; }

.pak-nav { flex: 1; overflow-x: auto; }
.pak-nav__list {
	list-style: none;
	display: flex;
	gap: 1.6rem;
	margin: 0;
	padding: 0;
	font-size: 0.95rem;
	font-weight: 600;
}
.pak-nav__list li { position: relative; }
.pak-nav__list a { color: var(--pak-text-dim); padding: 0.4rem 0; display: inline-block; transition: color 0.2s ease; }
.pak-nav__list a:hover { color: var(--pak-teal); }

.pak-nav__list .menu-item-has-children > a::after {
	content: "";
	display: inline-block;
	width: 6px;
	height: 6px;
	margin-inline-start: 0.4em;
	border-inline-end: 2px solid currentColor;
	border-bottom: 2px solid currentColor;
	transform: rotate(45deg) translateY(-2px);
	transition: transform 0.25s ease;
	opacity: 0.7;
}
.pak-nav__list .menu-item-has-children:hover > a::after,
.pak-nav__list .menu-item-has-children:focus-within > a::after {
	transform: rotate(225deg) translateY(1px);
}

.pak-nav__list .sub-menu {
	list-style: none;
	position: absolute;
	inset-inline-start: -0.75rem;
	top: 100%;
	background: rgba(23, 33, 31, 0.92);
	backdrop-filter: blur(12px);
	border: 1px solid var(--pak-border);
	border-radius: 14px;
	padding: 0.5rem;
	min-width: 210px;
	margin: 0;
	box-shadow: 0 24px 48px -20px rgba(0,0,0,0.65);
	opacity: 0;
	visibility: hidden;
	transform: translateY(6px);
	transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s;
}
.pak-nav__list li:hover > .sub-menu,
.pak-nav__list li:focus-within > .sub-menu {
	opacity: 1;
	visibility: visible;
	transform: translateY(4px);
}
.pak-nav__list .sub-menu a {
	padding: 0.55rem 0.7rem;
	border-radius: 9px;
	display: flex;
	align-items: center;
	gap: 0.6rem;
}
.pak-nav__list .sub-menu a::before {
	content: "";
	width: 9px;
	height: 9px;
	border-radius: 50%;
	background: var(--pak-teal);
	flex-shrink: 0;
}
.pak-nav__list .sub-menu li.pak-svc-ai a::before { background: var(--pak-maroon); }
.pak-nav__list .sub-menu li.pak-svc-iot a::before { background: var(--pak-teal); }
.pak-nav__list .sub-menu li.pak-svc-electronics a::before { background: var(--pak-teal-dark); }
.pak-nav__list .sub-menu li.pak-svc-automation a::before { background: var(--pak-orange); }
.pak-nav__list .sub-menu a:hover { background: rgba(108, 196, 192, 0.12); }

.pak-lang-switch {
	display: flex;
	gap: 0.25rem;
	background: var(--pak-surface);
	border: 1px solid var(--pak-border);
	border-radius: 999px;
	padding: 0.25rem;
	font-size: 0.8rem;
	font-weight: 700;
}
.pak-lang-switch a { padding: 0.35em 0.7em; border-radius: 999px; color: var(--pak-text-dim); }
.pak-lang-switch a.is-active { background: var(--pak-teal-dark); color: #fff; }

.pak-nav-toggle { display: none; background: none; border: 0; cursor: pointer; padding: 0.4rem; }
.pak-nav-toggle span {
	display: block;
	width: 22px;
	height: 2px;
	background: var(--pak-text);
	margin: 5px 0;
}

/* ---------- Hero ---------- */
.pak-hero {
	position: relative;
	overflow: hidden;
	padding: 5rem 0 4rem;
	min-height: 70vh;
	display: flex;
	align-items: center;
}
.pak-hero__canvas-wrap {
	position: absolute;
	inset: 0;
	z-index: 0;
	opacity: 0.55;
	mask-image: radial-gradient(ellipse at 40% 40%, black 45%, transparent 85%);
	-webkit-mask-image: radial-gradient(ellipse at 40% 40%, black 45%, transparent 85%);
}
.pak-hero__canvas-wrap canvas { width: 100%; height: 100%; display: block; }

.pak-hero__glow {
	position: absolute;
	inset: -20% -10% auto -10%;
	height: 140%;
	z-index: 1;
	background:
		radial-gradient(circle at 30% 20%, rgba(232, 88, 47, 0.18), transparent 55%),
		radial-gradient(circle at 75% 60%, rgba(108, 196, 192, 0.16), transparent 55%);
	pointer-events: none;
}
.pak-hero__inner { position: relative; z-index: 2; max-width: 640px; }
.pak-hero__title { font-size: clamp(2rem, 4.2vw, 3rem); }
.pak-hero__sub { color: var(--pak-text-dim); font-size: 1.1rem; margin-bottom: 1.2rem; max-width: 46ch; }

.pak-hero__network {
	position: absolute;
	inset-inline-end: -4%;
	top: 50%;
	transform: translateY(-50%);
	width: min(46vw, 460px);
	opacity: 0.95;
	z-index: 2;
	pointer-events: none;
}
.pak-network-svg { width: 100%; height: auto; }
.pak-network-line {
	fill: none;
	stroke: rgba(155, 176, 172, 0.35);
	stroke-width: 2;
	stroke-dasharray: 6 8;
}
.pak-node { filter: drop-shadow(0 0 10px currentColor); }
.pak-node--maroon { fill: var(--pak-maroon); color: var(--pak-maroon); }
.pak-node--teal { fill: var(--pak-teal); color: var(--pak-teal); }
.pak-node--teal-dark { fill: var(--pak-teal-dark); color: var(--pak-teal-dark); }
.pak-node--orange { fill: var(--pak-orange); color: var(--pak-orange); }

@media (prefers-reduced-motion: no-preference) {
	.pak-node { animation: pak-pulse 2.6s ease-in-out infinite; }
	.pak-node--teal { animation-delay: 0.3s; }
	.pak-node--teal-dark { animation-delay: 0.6s; }
	.pak-node--orange { animation-delay: 0.9s; }
	.pak-network-line { animation: pak-dash 6s linear infinite; }
}
@keyframes pak-pulse {
	0%, 100% { r: 14; opacity: 1; }
	50% { r: 17; opacity: 0.75; }
}
@keyframes pak-dash { to { stroke-dashoffset: -140; } }

/* ---------- Services (diamond layout) ---------- */
.pak-services { padding: 4.5rem 0; }
.pak-services__grid {
	display: grid;
	grid-template-columns: 1fr 1fr;
	grid-template-areas:
		"top   top"
		"left  right"
		"bottom bottom";
	gap: 1.25rem;
	max-width: 780px;
	margin: 0 auto;
}
.pak-service-card--ai { grid-area: top; }
.pak-service-card--iot { grid-area: left; }
.pak-service-card--electronics { grid-area: right; }
.pak-service-card--automation { grid-area: bottom; }

.pak-service-card {
	display: block;
	background: var(--pak-surface);
	border: 1px solid var(--pak-border);
	border-radius: var(--pak-radius);
	padding: 1.75rem;
	position: relative;
	overflow: hidden;
	transition: transform 0.3s cubic-bezier(.16,.84,.44,1), border-color 0.3s ease, box-shadow 0.3s ease;
}
.pak-service-card::before {
	content: "";
	position: absolute;
	inset: -2px;
	border-radius: inherit;
	padding: 1px;
	background: conic-gradient(from 0deg, var(--pak-maroon), var(--pak-orange), var(--pak-teal), var(--pak-teal-dark), var(--pak-maroon));
	-webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
	-webkit-mask-composite: xor;
	mask-composite: exclude;
	opacity: 0;
	transition: opacity 0.35s ease;
	animation: pak-spin 6s linear infinite;
	animation-play-state: paused;
}
.pak-service-card:hover::before { opacity: 1; animation-play-state: running; }
@keyframes pak-spin { to { transform: rotate(360deg); } }

.pak-service-card:hover {
	transform: translateY(-6px) scale(1.015);
	box-shadow: 0 20px 40px -18px rgba(0,0,0,0.65);
}
.pak-service-card--ai:hover { border-color: var(--pak-maroon); }
.pak-service-card--iot:hover { border-color: var(--pak-teal); }
.pak-service-card--electronics:hover { border-color: var(--pak-teal-dark); }
.pak-service-card--automation:hover { border-color: var(--pak-orange); }
@media (prefers-reduced-motion: reduce) {
	.pak-service-card::before { animation: none; }
}

.pak-service-card__dot {
	display: inline-block;
	width: 12px;
	height: 12px;
	border-radius: 50%;
	margin-bottom: 0.9rem;
	background: var(--pak-teal);
}
.pak-service-card--ai .pak-service-card__dot,
.pak-service-card__dot--ai { background: var(--pak-maroon); }
.pak-service-card--iot .pak-service-card__dot,
.pak-service-card__dot--iot { background: var(--pak-teal); }
.pak-service-card--electronics .pak-service-card__dot,
.pak-service-card__dot--electronics { background: var(--pak-teal-dark); }
.pak-service-card--automation .pak-service-card__dot,
.pak-service-card__dot--automation { background: var(--pak-orange); }

.pak-service-card__title { font-size: 1.15rem; margin-bottom: 0.4rem; }
.pak-service-card__desc { color: var(--pak-text-dim); font-size: 0.95rem; margin-bottom: 0.8rem; }
.pak-service-card__more { font-size: 0.85rem; font-weight: 700; color: var(--pak-teal); }

.pak-service-card--small {
	display: flex;
	align-items: center;
	gap: 0.6rem;
	padding: 0.9rem 1.2rem;
}
.pak-service-card--small .pak-service-card__dot { margin: 0; }

@media (max-width: 640px) {
	.pak-services__grid {
		grid-template-columns: 1fr;
		grid-template-areas: "top" "left" "right" "bottom";
	}
}

/* ---------- About teaser / CTA band ---------- */
.pak-about-teaser, .pak-cta-band { padding: 4rem 0; }
.pak-about-teaser { background: var(--pak-bg-alt); }
.pak-about-teaser__inner, .pak-cta-band__inner { max-width: 680px; margin: 0 auto; text-align: center; }
.pak-about-teaser__text { color: var(--pak-text-dim); }
.pak-cta-band__inner h2 { font-size: 1.4rem; }

/* ---------- Page hero (about/service/contact) ---------- */
.pak-page-hero {
	padding: 3.5rem 0 2.5rem;
	border-bottom: 1px solid var(--pak-border);
	background: linear-gradient(180deg, rgba(108,196,192,0.06), transparent);
}
.pak-page-hero__title { font-size: clamp(1.6rem, 3vw, 2.3rem); }
.pak-page-hero__sub { color: var(--pak-text-dim); }
.pak-page-hero .pak-service-card__dot { width: 16px; height: 16px; }

/* ---------- About content ---------- */
.pak-about-content { padding: 3.5rem 0; }
.pak-about-content__inner { max-width: 720px; margin: 0 auto; }
.pak-about-content__text { color: var(--pak-text-dim); font-size: 1.05rem; }
.pak-about-content__fields {
	display: flex;
	flex-wrap: wrap;
	gap: 0.9rem;
	margin-top: 1.5rem;
}
.pak-about-field {
	display: flex;
	align-items: center;
	gap: 0.5rem;
	background: var(--pak-surface);
	border: 1px solid var(--pak-border);
	border-radius: 999px;
	padding: 0.5rem 1rem;
	font-size: 0.9rem;
}

/* ---------- Service content ---------- */
.pak-service-content { padding: 3rem 0 4rem; }
.pak-service-content__text { color: var(--pak-text-dim); font-size: 1.05rem; max-width: 65ch; }
.pak-service-content__others {
	display: flex;
	flex-wrap: wrap;
	gap: 0.75rem;
	margin-top: 2.5rem;
	padding-top: 2rem;
	border-top: 1px solid var(--pak-border);
}

/* ---------- Contact ---------- */
.pak-contact { padding: 3rem 0 5rem; }
.pak-contact__inner {
	display: grid;
	grid-template-columns: 1fr 1.4fr;
	gap: 2.5rem;
	align-items: start;
}
.pak-contact__info {
	list-style: none;
	margin: 0;
	padding: 0;
	display: flex;
	flex-direction: column;
	gap: 1rem;
	background: var(--pak-surface);
	border: 1px solid var(--pak-border);
	border-radius: var(--pak-radius);
	padding: 1.5rem;
}
.pak-contact__info a:hover { color: var(--pak-teal); }

.pak-form { display: flex; flex-direction: column; gap: 0.5rem; }
.pak-form label { font-weight: 700; font-size: 0.9rem; margin-top: 0.6rem; }
.pak-form input, .pak-form textarea {
	background: var(--pak-surface);
	border: 1px solid var(--pak-border);
	border-radius: 10px;
	padding: 0.75em 0.9em;
	color: var(--pak-text);
	font-size: 0.95rem;
}
.pak-form input:focus, .pak-form textarea:focus { border-color: var(--pak-teal); }
.pak-form button { align-self: start; margin-top: 1rem; }

.pak-form__notice { padding: 0.8em 1em; border-radius: 10px; font-size: 0.9rem; }
.pak-form__notice--success { background: rgba(31, 111, 106, 0.25); border: 1px solid var(--pak-teal-dark); }
.pak-form__notice--error { background: rgba(161, 60, 44, 0.25); border: 1px solid var(--pak-maroon); }

@media (max-width: 780px) {
	.pak-contact__inner { grid-template-columns: 1fr; }
	.pak-hero__network { display: none; }
}

/* ---------- Footer ---------- */
.pak-footer { background: var(--pak-bg-alt); border-top: 1px solid var(--pak-border); padding: 2.5rem 0; margin-top: 2rem; }
.pak-footer__inner { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 1.5rem; }
.pak-footer__brand { display: flex; align-items: center; gap: 0.6rem; font-weight: 700; }
.pak-footer__logo { width: 30px; height: 30px; }
.pak-footer__contact { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 1.2rem; font-size: 0.9rem; color: var(--pak-text-dim); }
.pak-footer__label { color: var(--pak-text); font-weight: 700; }
.pak-footer__copy { width: 100%; text-align: center; color: var(--pak-text-dim); font-size: 0.82rem; margin-top: 1.2rem; }

/* ---------- Mobile nav ---------- */
@media (max-width: 880px) {
	.pak-nav-toggle { display: block; order: 3; }
	.pak-nav {
		position: absolute;
		inset-inline: 0;
		top: 100%;
		background: var(--pak-bg-alt);
		border-bottom: 1px solid var(--pak-border);
		display: none;
		padding: 1rem 1.5rem;
	}
	.pak-nav.is-open { display: block; }
	.pak-nav__list { flex-direction: column; gap: 0.9rem; }
	.pak-nav__list .sub-menu { position: static; display: block; background: none; border: 0; box-shadow: none; padding-inline-start: 1rem; }
	.pak-lang-switch { order: 2; }
}