/* ==========================================================================
   Sib-Stone — основной CSS
   Структура:
   1. Токены (общие) и палитры (warm / graphite / cool)
   2. Сброс и база
   3. Типографика
   4. Раскладка и контейнеры
   5. Кнопки
   6. Хедер
   7. Hero-слайдер
   8. Секции, карточки, сетки
   9. Преимущества / процесс
   10. Отзывы
   11. Портфолио (вкладки + слайдер)
   12. Калькулятор-промо / CTA
   13. Контакты + карта
   14. Футер
   15. Утилиты и адаптив
   ========================================================================== */

/* 1. ТОКЕНЫ ================================================================ */
:root {
	/* Типографика */
	--font-display: "Cormorant", Georgia, "Times New Roman", serif;
	--font-body: "Golos Text", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

	--fs-hero: clamp(2.6rem, 6vw, 4.9rem);
	--fs-h1: clamp(2.05rem, 4.5vw, 3.4rem);
	--fs-h2: clamp(1.8rem, 3.6vw, 2.7rem);
	--fs-h3: clamp(1.3rem, 2.2vw, 1.65rem);
	--fs-lead: clamp(1.06rem, 1.5vw, 1.3rem);
	--fs-base: 1.0625rem;
	--fs-sm: 0.9375rem;
	--fs-xs: 0.8125rem;
	--lh-tight: 1.08;
	--lh-snug: 1.3;
	--lh-base: 1.65;

	/* Отступы */
	--space-3xs: 0.25rem;
	--space-2xs: 0.375rem;
	--space-xs: 0.625rem;
	--space-sm: 1rem;
	--space-md: 1.5rem;
	--space-lg: 2.5rem;
	--space-xl: 4rem;
	--section-y: clamp(3.5rem, 8vw, 7.5rem);

	/* Геометрия */
	--container: 1240px;
	--container-narrow: 880px;
	--gutter: clamp(1rem, 4vw, 2.5rem);
	--radius-sm: 6px;
	--radius: 10px;
	--radius-lg: 18px;
	--radius-pill: 999px;
	--header-h: 84px;
	--header-h-scrolled: 66px;

	--transition: 180ms cubic-bezier(0.4, 0, 0.2, 1);
	--transition-slow: 480ms cubic-bezier(0.4, 0, 0.2, 1);
	--ring: 0 0 0 3px var(--accent-soft);
}

/* Палитра 1 — Тёплый камень (стартовая, светлая) */
[data-palette="warm"] {
	--bg: #f5f1ea;
	--bg-alt: #ece4d6;
	--surface: #ffffff;
	--surface-2: #fbf7f0;
	--text: #2a2724;
	--text-muted: #6e665c;
	--heading: #211e1a;
	--border: #e6dccd;
	--border-strong: #d6c7af;
	--accent: #bd6b3e;
	--accent-hover: #a2562e;
	--accent-soft: #f2ddcd;
	--on-accent: #ffffff;
	--dark: #272320;
	--dark-2: #322d28;
	--dark-text: #ece4d8;
	--dark-muted: #a99f90;
	--dark-border: #443e36;
	--overlay: linear-gradient(180deg, rgba(28, 24, 20, 0.35) 0%, rgba(28, 24, 20, 0.55) 60%, rgba(28, 24, 20, 0.7) 100%);
	--shadow-color: 40, 33, 26;
}

/* Палитра 2 — Графит и латунь (тёмная) */
[data-palette="graphite"] {
	--bg: #16140f;
	--bg-alt: #1d1a13;
	--surface: #211d16;
	--surface-2: #27221a;
	--text: #e8e1d2;
	--text-muted: #a59b87;
	--heading: #f6f1e4;
	--border: #34302a;
	--border-strong: #494337;
	--accent: #c9a45c;
	--accent-hover: #dcb96f;
	--accent-soft: rgba(201, 164, 92, 0.16);
	--on-accent: #1a1610;
	--dark: #100e0a;
	--dark-2: #1a1710;
	--dark-text: #e8e1d2;
	--dark-muted: #9c9180;
	--dark-border: #2e2a22;
	--overlay: linear-gradient(180deg, rgba(8, 7, 4, 0.4) 0%, rgba(8, 7, 4, 0.62) 60%, rgba(8, 7, 4, 0.78) 100%);
	--shadow-color: 0, 0, 0;
}

/* Палитра 3 — Холодный минимализм (светлая) */
[data-palette="cool"] {
	--bg: #ffffff;
	--bg-alt: #eef3f4;
	--surface: #ffffff;
	--surface-2: #f6f9fa;
	--text: #1b2226;
	--text-muted: #5c6b72;
	--heading: #11171a;
	--border: #e2e8ea;
	--border-strong: #c8d3d6;
	--accent: #1e6e6e;
	--accent-hover: #155656;
	--accent-soft: #dcecec;
	--on-accent: #ffffff;
	--dark: #14201f;
	--dark-2: #1c2a29;
	--dark-text: #e6efee;
	--dark-muted: #9fb3b2;
	--dark-border: #2c3c3a;
	--overlay: linear-gradient(180deg, rgba(10, 18, 18, 0.32) 0%, rgba(10, 18, 18, 0.52) 60%, rgba(10, 18, 18, 0.68) 100%);
	--shadow-color: 18, 30, 32;
}

/* Тени (зависят от --shadow-color палитры) */
:root {
	--shadow-sm: 0 1px 2px rgba(var(--shadow-color), 0.06), 0 2px 6px rgba(var(--shadow-color), 0.05);
	--shadow-md: 0 4px 12px rgba(var(--shadow-color), 0.08), 0 12px 28px rgba(var(--shadow-color), 0.07);
	--shadow-lg: 0 10px 24px rgba(var(--shadow-color), 0.1), 0 28px 60px rgba(var(--shadow-color), 0.12);
}

/* 2. СБРОС И БАЗА ========================================================== */
*,
*::before,
*::after {
	box-sizing: border-box;
}

html {
	-webkit-text-size-adjust: 100%;
	scroll-behavior: smooth;
	scroll-padding-top: calc(var(--header-h) + 1rem);
}

body {
	margin: 0;
	background-color: var(--bg);
	color: var(--text);
	font-family: var(--font-body);
	font-size: var(--fs-base);
	line-height: var(--lh-base);
	font-feature-settings: "liga" 1, "kern" 1;
	-webkit-font-smoothing: antialiased;
	-moz-osx-font-smoothing: grayscale;
	overflow-x: hidden;
}

img,
picture,
svg,
video {
	max-width: 100%;
	height: auto;
	display: block;
}

a {
	color: var(--accent);
	text-decoration: none;
	transition: color var(--transition);
}

a:hover {
	color: var(--accent-hover);
}

ul,
ol {
	margin: 0;
	padding: 0;
}

button {
	font-family: inherit;
	cursor: pointer;
}

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

/* 3. ТИПОГРАФИКА =========================================================== */
h1,
h2,
h3,
h4 {
	font-family: var(--font-display);
	color: var(--heading);
	font-weight: 600;
	line-height: var(--lh-tight);
	margin: 0 0 var(--space-sm);
	letter-spacing: -0.01em;
}

h1 {
	font-size: var(--fs-h1);
}

h2 {
	font-size: var(--fs-h2);
}

h3 {
	font-size: var(--fs-h3);
	font-weight: 600;
}

p {
	margin: 0 0 var(--space-sm);
}

p:last-child {
	margin-bottom: 0;
}

.lead {
	font-size: var(--fs-lead);
	line-height: 1.5;
	color: var(--text-muted);
}

strong {
	font-weight: 600;
	color: var(--heading);
}

.eyebrow {
	display: inline-flex;
	align-items: center;
	gap: 0.5rem;
	font-family: var(--font-body);
	font-size: var(--fs-xs);
	font-weight: 600;
	letter-spacing: 0.16em;
	text-transform: uppercase;
	color: var(--accent);
	margin-bottom: var(--space-sm);
}

.eyebrow::before {
	content: "";
	width: 28px;
	height: 2px;
	background: var(--accent);
	display: inline-block;
}

/* 4. РАСКЛАДКА ============================================================= */
.container {
	width: 100%;
	max-width: var(--container);
	margin-inline: auto;
	padding-inline: var(--gutter);
}

.container--narrow {
	max-width: var(--container-narrow);
}

.section {
	padding-block: var(--section-y);
}

.section--alt {
	background: var(--bg-alt);
}

.section--surface {
	background: var(--surface);
}

.section--dark {
	background: var(--dark);
	color: var(--dark-text);
}

.section--dark h1,
.section--dark h2,
.section--dark h3 {
	color: var(--dark-text);
}

.section__head {
	max-width: 760px;
	margin-bottom: clamp(2rem, 4vw, 3.5rem);
}

.section__head--center {
	margin-inline: auto;
	text-align: center;
}

.section__head--center .eyebrow {
	justify-content: center;
}

.section__title {
	font-size: var(--fs-h2);
	margin-bottom: var(--space-sm);
}

.section__text {
	color: var(--text-muted);
	font-size: var(--fs-lead);
	line-height: 1.55;
}

.grid {
	display: grid;
	gap: clamp(1rem, 2.5vw, 2rem);
}

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

.grid--3 {
	grid-template-columns: repeat(3, 1fr);
}

.grid--4 {
	grid-template-columns: repeat(4, 1fr);
}

/* 5. КНОПКИ ================================================================ */
.btn {
	--btn-bg: var(--accent);
	--btn-fg: var(--on-accent);
	display: inline-flex;
	align-items: center;
	justify-content: center;
	gap: 0.55rem;
	padding: 0.85rem 1.6rem;
	min-height: 48px;
	border: 1px solid transparent;
	border-radius: var(--radius);
	background: var(--btn-bg);
	color: var(--btn-fg);
	font-family: var(--font-body);
	font-size: var(--fs-base);
	font-weight: 600;
	line-height: 1.1;
	text-align: center;
	transition: background var(--transition), color var(--transition),
		border-color var(--transition), transform var(--transition),
		box-shadow var(--transition);
}

.btn:hover {
	background: var(--accent-hover);
	color: var(--on-accent);
	transform: translateY(-2px);
	box-shadow: var(--shadow-md);
}

.btn:active {
	transform: translateY(0);
}

.btn--outline {
	background: transparent;
	color: var(--accent);
	border-color: var(--border-strong);
}

.btn--outline:hover {
	background: var(--accent);
	color: var(--on-accent);
	border-color: var(--accent);
}

.btn--ghost {
	background: var(--surface);
	color: var(--heading);
	border-color: var(--border);
}

.btn--ghost:hover {
	background: var(--surface-2);
	color: var(--heading);
	border-color: var(--border-strong);
}

/* На тёмном фоне (hero/футер) */
.btn--on-dark.btn--outline {
	color: #fff;
	border-color: rgba(255, 255, 255, 0.5);
}

.btn--on-dark.btn--outline:hover {
	background: #fff;
	color: var(--dark);
	border-color: #fff;
}

.btn--lg {
	padding: 1.05rem 2.1rem;
	min-height: 56px;
	font-size: 1.1rem;
}

.btn--block {
	width: 100%;
}

.btn svg {
	width: 1.15em;
	height: 1.15em;
	flex: none;
}

/* 6. ХЕДЕР ================================================================= */
.site-header {
	position: sticky;
	top: 0;
	z-index: 100;
	background: color-mix(in srgb, var(--surface) 90%, transparent);
	-webkit-backdrop-filter: blur(10px);
	backdrop-filter: blur(10px);
	border-bottom: 1px solid var(--border);
	transition: box-shadow var(--transition), background var(--transition);
}

.site-header.is-scrolled {
	box-shadow: var(--shadow-sm);
	background: color-mix(in srgb, var(--surface) 96%, transparent);
}

.site-header__bar {
	display: flex;
	align-items: center;
	gap: clamp(1rem, 3vw, 2rem);
	height: var(--header-h);
	transition: height var(--transition);
}

.site-header.is-scrolled .site-header__bar {
	height: var(--header-h-scrolled);
}

.site-branding {
	display: flex;
	align-items: center;
	flex: none;
}

.site-branding .custom-logo-link img,
.site-branding__logo img {
	max-height: 52px;
	width: auto;
}

.site-header.is-scrolled .site-branding .custom-logo-link img {
	max-height: 42px;
}

.site-branding__text {
	display: flex;
	flex-direction: column;
	line-height: 1.05;
}

.site-branding__name {
	font-family: var(--font-display);
	font-size: 1.55rem;
	font-weight: 700;
	color: var(--heading);
	letter-spacing: 0.01em;
}

.site-branding__name b {
	color: var(--accent);
	font-weight: 700;
}

.site-branding__tagline {
	font-size: 0.7rem;
	letter-spacing: 0.18em;
	text-transform: uppercase;
	color: var(--text-muted);
	margin-top: 2px;
}

/* Навигация */
.main-navigation {
	margin-left: auto;
}

.main-navigation ul {
	list-style: none;
	display: flex;
	align-items: center;
	gap: clamp(0.5rem, 1.5vw, 1.6rem);
}

.main-navigation a {
	display: inline-flex;
	align-items: center;
	color: var(--heading);
	font-weight: 500;
	font-size: 1rem;
	padding: 0.4rem 0.15rem;
	position: relative;
}

.main-navigation a::after {
	content: "";
	position: absolute;
	left: 0;
	right: 0;
	bottom: -2px;
	height: 2px;
	background: var(--accent);
	transform: scaleX(0);
	transform-origin: left;
	transition: transform var(--transition);
}

.main-navigation a:hover::after,
.main-navigation .current-menu-item > a::after {
	transform: scaleX(1);
}

.main-navigation a:hover {
	color: var(--accent);
}

/* Выделенный пункт «Калькулятор» */
.main-navigation .menu-item--accent a,
.main-navigation .menu-item-calculator a {
	background: var(--accent);
	color: var(--on-accent);
	padding: 0.5rem 1rem;
	border-radius: var(--radius-pill);
	font-weight: 600;
}

.main-navigation .menu-item--accent a:hover,
.main-navigation .menu-item-calculator a:hover {
	background: var(--accent-hover);
	color: var(--on-accent);
}

.main-navigation .menu-item--accent a::after,
.main-navigation .menu-item-calculator a::after {
	display: none;
}

/* Действия в шапке */
.header-actions {
	display: flex;
	align-items: center;
	gap: clamp(0.75rem, 2vw, 1.4rem);
	flex: none;
}

.header-phone {
	display: inline-flex;
	flex-direction: column;
	align-items: flex-end;
	line-height: 1.15;
	color: var(--heading);
	font-weight: 700;
	font-size: 1.08rem;
	white-space: nowrap;
}

.header-phone span {
	font-size: 0.7rem;
	font-weight: 500;
	letter-spacing: 0.08em;
	text-transform: uppercase;
	color: var(--text-muted);
}

.header-phone:hover {
	color: var(--accent);
}

/* Бургер */
.menu-toggle {
	display: none;
	flex: none;
	width: 46px;
	height: 46px;
	border: 1px solid var(--border-strong);
	border-radius: var(--radius);
	background: var(--surface);
	padding: 0;
	align-items: center;
	justify-content: center;
}

.menu-toggle span,
.menu-toggle span::before,
.menu-toggle span::after {
	display: block;
	width: 22px;
	height: 2px;
	background: var(--heading);
	position: relative;
	transition: transform var(--transition), opacity var(--transition);
}

.menu-toggle span::before,
.menu-toggle span::after {
	content: "";
	position: absolute;
	left: 0;
}

.menu-toggle span::before {
	top: -7px;
}

.menu-toggle span::after {
	top: 7px;
}

body.menu-open .menu-toggle span {
	background: transparent;
}

body.menu-open .menu-toggle span::before {
	transform: translateY(7px) rotate(45deg);
}

body.menu-open .menu-toggle span::after {
	transform: translateY(-7px) rotate(-45deg);
}

/* 7. HERO ================================================================== */
.hero {
	position: relative;
	min-height: clamp(540px, 88vh, 860px);
	display: flex;
	align-items: center;
	color: #fff;
	overflow: hidden;
	background: var(--dark);
}

.hero__slider,
.hero__slide {
	position: absolute;
	inset: 0;
}

.hero__slide {
	background-size: cover;
	background-position: center;
	opacity: 0;
	transition: opacity var(--transition-slow);
}

.hero__slide.is-active {
	opacity: 1;
}

.hero__slide::after {
	content: "";
	position: absolute;
	inset: 0;
	background: var(--overlay);
}

.hero__content {
	position: relative;
	z-index: 2;
	max-width: 760px;
	margin-block: clamp(2.5rem, 7vh, 5rem);
	padding: clamp(1.6rem, 3.5vw, 2.8rem) clamp(1.5rem, 3.5vw, 3rem);
	background: rgba(18, 15, 11, 0.46);
	-webkit-backdrop-filter: blur(7px);
	backdrop-filter: blur(7px);
	border: 1px solid rgba(255, 255, 255, 0.12);
	border-radius: var(--radius-lg);
	box-shadow: 0 24px 70px rgba(0, 0, 0, 0.5);
	text-shadow: 0 1px 6px rgba(0, 0, 0, 0.45);
}

.hero .eyebrow {
	color: #fff;
}

.hero .eyebrow::before {
	background: var(--accent);
}

.hero__title {
	font-size: var(--fs-hero);
	color: #fff;
	font-weight: 600;
	line-height: 1.02;
	margin-bottom: var(--space-md);
	text-wrap: balance;
}

.hero__subtitle {
	font-size: var(--fs-lead);
	color: rgba(255, 255, 255, 0.88);
	max-width: 600px;
	margin-bottom: var(--space-lg);
}

.hero__actions {
	display: flex;
	flex-wrap: wrap;
	gap: var(--space-sm);
}

/* Стрелки */
.hero__arrow {
	position: absolute;
	top: 50%;
	transform: translateY(-50%);
	z-index: 3;
	width: 52px;
	height: 52px;
	border-radius: 50%;
	border: 1px solid rgba(255, 255, 255, 0.4);
	background: rgba(20, 18, 14, 0.28);
	-webkit-backdrop-filter: blur(4px);
	backdrop-filter: blur(4px);
	color: #fff;
	display: flex;
	align-items: center;
	justify-content: center;
	transition: background var(--transition), border-color var(--transition);
}

.hero__arrow:hover {
	background: var(--accent);
	border-color: var(--accent);
	color: #fff;
}

.hero__arrow--prev {
	left: clamp(0.75rem, 3vw, 2rem);
}

.hero__arrow--next {
	right: clamp(0.75rem, 3vw, 2rem);
}

.hero__arrow svg {
	width: 22px;
	height: 22px;
}

/* Точки */
.hero__dots {
	position: absolute;
	bottom: clamp(1rem, 3vh, 2.2rem);
	left: 50%;
	transform: translateX(-50%);
	z-index: 3;
	display: flex;
	gap: 0.6rem;
}

.hero__dot {
	width: 10px;
	height: 10px;
	border-radius: 50%;
	border: 1px solid rgba(255, 255, 255, 0.7);
	background: transparent;
	padding: 0;
	transition: background var(--transition), transform var(--transition);
}

.hero__dot.is-active {
	background: #fff;
	transform: scale(1.15);
}

/* Плашка-якорь под hero (преимущества/цена) */
.hero-strip {
	background: var(--surface);
	border-bottom: 1px solid var(--border);
}

.hero-strip__inner {
	display: grid;
	grid-template-columns: repeat(4, 1fr);
	gap: 1px;
	background: var(--border);
}

.hero-strip__item {
	background: var(--surface);
	padding: clamp(1rem, 2.5vw, 1.6rem) clamp(0.75rem, 2vw, 1.4rem);
	display: flex;
	gap: 0.75rem;
	align-items: center;
}

.hero-strip__item svg {
	width: 30px;
	height: 30px;
	color: var(--accent);
	flex: none;
}

.hero-strip__item b {
	display: block;
	color: var(--heading);
	font-size: 1.02rem;
}

.hero-strip__item span {
	font-size: var(--fs-sm);
	color: var(--text-muted);
}

/* 8. КАРТОЧКИ ============================================================== */
.card {
	background: var(--surface);
	border: 1px solid var(--border);
	border-radius: var(--radius-lg);
	overflow: hidden;
	transition: transform var(--transition), box-shadow var(--transition),
		border-color var(--transition);
	display: flex;
	flex-direction: column;
}

.card:hover {
	transform: translateY(-4px);
	box-shadow: var(--shadow-md);
	border-color: var(--border-strong);
}

.card__media {
	aspect-ratio: 4 / 3;
	overflow: hidden;
	background: var(--surface-2);
}

.card__media img {
	width: 100%;
	height: 100%;
	object-fit: cover;
	transition: transform var(--transition-slow);
}

.card:hover .card__media img {
	transform: scale(1.04);
}

.card__body {
	padding: var(--space-md);
	display: flex;
	flex-direction: column;
	gap: 0.4rem;
	flex: 1;
}

.card__title {
	font-size: 1.3rem;
	margin: 0;
}

.card__meta {
	font-size: var(--fs-sm);
	color: var(--text-muted);
}

/* 9. ПРЕИМУЩЕСТВА / ПРОЦЕСС =============================================== */
.feature {
	background: var(--surface);
	border: 1px solid var(--border);
	border-radius: var(--radius-lg);
	padding: clamp(1.4rem, 2.5vw, 2rem);
}

.feature__icon {
	width: 54px;
	height: 54px;
	border-radius: var(--radius);
	background: var(--accent-soft);
	color: var(--accent);
	display: flex;
	align-items: center;
	justify-content: center;
	margin-bottom: var(--space-sm);
}

.feature__icon svg {
	width: 28px;
	height: 28px;
}

.feature h3 {
	font-size: 1.35rem;
	margin-bottom: 0.4rem;
}

.feature p {
	color: var(--text-muted);
	font-size: var(--fs-sm);
}

/* Статистика */
.stats {
	display: grid;
	grid-template-columns: repeat(4, 1fr);
	gap: clamp(1rem, 3vw, 2rem);
	text-align: center;
}

.stat__num {
	font-family: var(--font-display);
	font-size: clamp(2.4rem, 5vw, 3.6rem);
	font-weight: 700;
	color: var(--accent);
	line-height: 1;
}

.stat__label {
	color: var(--text-muted);
	font-size: var(--fs-sm);
	margin-top: 0.4rem;
}

/* Процесс */
.steps {
	display: grid;
	grid-template-columns: repeat(4, 1fr);
	gap: clamp(1rem, 2.5vw, 1.75rem);
	counter-reset: step;
}

.step {
	position: relative;
	padding-top: 3.4rem;
}

.step::before {
	counter-increment: step;
	content: "0" counter(step);
	position: absolute;
	top: 0;
	left: 0;
	font-family: var(--font-display);
	font-size: 2.6rem;
	font-weight: 700;
	color: var(--accent);
	opacity: 0.7;
	line-height: 1;
}

.step h3 {
	font-size: 1.25rem;
	margin-bottom: 0.3rem;
}

.step p {
	color: var(--text-muted);
	font-size: var(--fs-sm);
}

/* 10. ОТЗЫВЫ ============================================================== */
.reviews-grid {
	display: grid;
	grid-template-columns: repeat(3, 1fr);
	gap: clamp(1rem, 2.5vw, 1.75rem);
}

.review-card {
	background: var(--surface);
	border: 1px solid var(--border);
	border-radius: var(--radius-lg);
	padding: var(--space-md);
	display: flex;
	flex-direction: column;
	gap: var(--space-sm);
}

.review-card__head {
	display: flex;
	align-items: center;
	gap: 0.75rem;
}

.review-card__avatar {
	width: 48px;
	height: 48px;
	border-radius: 50%;
	object-fit: cover;
	background: var(--surface-2);
	flex: none;
}

.review-card__name {
	font-weight: 600;
	color: var(--heading);
}

.review-card__source {
	font-size: var(--fs-xs);
	color: var(--text-muted);
	display: inline-flex;
	align-items: center;
	gap: 0.3rem;
}

.review-card__stars {
	color: #e0a82e;
	letter-spacing: 2px;
	font-size: 0.95rem;
}

.review-card__text {
	color: var(--text);
	font-size: var(--fs-sm);
	line-height: 1.6;
}

.review-card__shot img {
	border-radius: var(--radius);
	border: 1px solid var(--border);
}

/* Видео-отзывы */
.video-reviews {
	display: grid;
	grid-template-columns: repeat(3, 1fr);
	gap: clamp(1rem, 2.5vw, 1.75rem);
}

.video-review {
	position: relative;
	border-radius: var(--radius-lg);
	overflow: hidden;
	border: 1px solid var(--border);
	background: #000;
}

.video-review iframe {
	width: 100%;
	aspect-ratio: 16 / 9;
	display: block;
	border: 0;
}

.review-links {
	display: flex;
	flex-wrap: wrap;
	gap: var(--space-sm);
	justify-content: center;
	margin-top: var(--space-lg);
}

/* 11. ПОРТФОЛИО (вкладки + слайдер) ====================================== */
.tabs__nav {
	display: flex;
	flex-wrap: wrap;
	gap: 0.5rem;
	justify-content: center;
	margin-bottom: clamp(1.5rem, 3vw, 2.5rem);
}

.tab-btn {
	border: 1px solid var(--border-strong);
	background: var(--surface);
	color: var(--heading);
	padding: 0.7rem 1.4rem;
	border-radius: var(--radius-pill);
	font-weight: 600;
	font-size: var(--fs-sm);
	transition: background var(--transition), color var(--transition),
		border-color var(--transition);
}

.tab-btn:hover {
	border-color: var(--accent);
	color: var(--accent);
}

.tab-btn.is-active {
	background: var(--accent);
	color: var(--on-accent);
	border-color: var(--accent);
}

.tab-panel {
	display: none;
}

.tab-panel.is-active {
	display: block;
}

/* Слайдер портфолио */
.pslider {
	position: relative;
}

.pslider__track {
	position: relative;
	border-radius: var(--radius-lg);
	overflow: hidden;
	background: var(--surface-2);
	aspect-ratio: 16 / 10;
}

.pslider__slide {
	position: absolute;
	inset: 0;
	opacity: 0;
	transition: opacity var(--transition-slow);
}

.pslider__slide.is-active {
	opacity: 1;
}

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

.pslider__caption {
	position: absolute;
	left: 0;
	right: 0;
	bottom: 0;
	padding: clamp(1.5rem, 4vw, 2.5rem) clamp(1rem, 3vw, 2rem) clamp(1rem, 3vw, 1.5rem);
	background: linear-gradient(180deg, transparent, rgba(15, 13, 10, 0.82));
	color: #fff;
}

.pslider__caption h3 {
	color: #fff;
	margin-bottom: 0.25rem;
	font-size: 1.4rem;
}

.pslider__caption p {
	color: rgba(255, 255, 255, 0.85);
	font-size: var(--fs-sm);
}

.pslider__arrow {
	position: absolute;
	top: 50%;
	transform: translateY(-50%);
	z-index: 3;
	width: 46px;
	height: 46px;
	border-radius: 50%;
	border: none;
	background: rgba(255, 255, 255, 0.9);
	color: var(--heading);
	display: flex;
	align-items: center;
	justify-content: center;
	box-shadow: var(--shadow-sm);
	transition: background var(--transition), color var(--transition);
}

.pslider__arrow:hover {
	background: var(--accent);
	color: #fff;
}

.pslider__arrow--prev {
	left: 1rem;
}

.pslider__arrow--next {
	right: 1rem;
}

.pslider__dots {
	display: flex;
	justify-content: center;
	gap: 0.5rem;
	margin-top: var(--space-md);
}

.pslider__dot {
	width: 9px;
	height: 9px;
	border-radius: 50%;
	border: 1px solid var(--border-strong);
	background: transparent;
	padding: 0;
}

.pslider__dot.is-active {
	background: var(--accent);
	border-color: var(--accent);
}

/* 12. CTA / КАЛЬКУЛЯТОР-ПРОМО ============================================ */
.cta-band {
	background: var(--dark);
	color: var(--dark-text);
	border-radius: var(--radius-lg);
	padding: clamp(2rem, 5vw, 3.5rem);
	display: grid;
	grid-template-columns: 1.5fr 1fr;
	gap: var(--space-lg);
	align-items: center;
}

.cta-band h2 {
	color: var(--dark-text);
}

.cta-band p {
	color: var(--dark-muted);
}

.cta-band__actions {
	display: flex;
	flex-direction: column;
	gap: var(--space-sm);
}

/* 13. КОНТАКТЫ =========================================================== */
.contacts-grid {
	display: grid;
	grid-template-columns: 1fr 1.2fr;
	gap: clamp(1.5rem, 3vw, 3rem);
	align-items: stretch;
}

.contacts-info {
	display: flex;
	flex-direction: column;
	gap: var(--space-md);
}

.contact-item {
	display: flex;
	gap: 0.85rem;
	align-items: flex-start;
}

.contact-item__icon {
	width: 44px;
	height: 44px;
	flex: none;
	border-radius: var(--radius);
	background: var(--accent-soft);
	color: var(--accent);
	display: flex;
	align-items: center;
	justify-content: center;
}

.contact-item__icon svg {
	width: 22px;
	height: 22px;
}

.contact-item__label {
	font-size: var(--fs-xs);
	text-transform: uppercase;
	letter-spacing: 0.1em;
	color: var(--text-muted);
}

.contact-item__value {
	font-size: 1.15rem;
	font-weight: 600;
	color: var(--heading);
}

.contact-item__value a {
	color: var(--heading);
}

.contact-item__value a:hover {
	color: var(--accent);
}

.contacts-map {
	border-radius: var(--radius-lg);
	overflow: hidden;
	border: 1px solid var(--border);
	min-height: 360px;
	background: var(--surface-2);
}

.contacts-map iframe {
	width: 100%;
	height: 100%;
	min-height: 360px;
	border: 0;
	display: block;
}

.socials {
	display: flex;
	gap: 0.6rem;
	flex-wrap: wrap;
}

.socials a {
	width: 44px;
	height: 44px;
	border-radius: var(--radius);
	border: 1px solid var(--border);
	background: var(--surface);
	display: flex;
	align-items: center;
	justify-content: center;
	color: var(--heading);
}

.socials a:hover {
	background: var(--accent);
	color: #fff;
	border-color: var(--accent);
}

.socials svg {
	width: 22px;
	height: 22px;
}

/* 14. ФУТЕР ============================================================== */
.site-footer {
	background: var(--dark);
	color: var(--dark-muted);
	padding-block: clamp(2.5rem, 5vw, 4rem) 2rem;
}

.site-footer a {
	color: var(--dark-text);
}

.site-footer a:hover {
	color: var(--accent);
}

.footer-grid {
	display: grid;
	grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
	gap: clamp(1.5rem, 3vw, 2.5rem);
	padding-bottom: var(--space-lg);
	border-bottom: 1px solid var(--dark-border);
}

.footer-col h4 {
	color: var(--dark-text);
	font-size: 1.2rem;
	margin-bottom: var(--space-sm);
}

.footer-col ul {
	list-style: none;
	display: flex;
	flex-direction: column;
	gap: 0.6rem;
}

.footer-brand__name {
	font-family: var(--font-display);
	font-size: 1.7rem;
	font-weight: 700;
	color: var(--dark-text);
}

.footer-brand p {
	margin-top: var(--space-sm);
	font-size: var(--fs-sm);
	max-width: 30ch;
}

.footer-bottom {
	display: flex;
	flex-wrap: wrap;
	justify-content: space-between;
	gap: var(--space-sm);
	padding-top: var(--space-md);
	font-size: var(--fs-sm);
}

/* 15. УТИЛИТЫ И АДАПТИВ ================================================== */
.screen-reader-text {
	border: 0;
	clip: rect(1px, 1px, 1px, 1px);
	clip-path: inset(50%);
	height: 1px;
	width: 1px;
	margin: -1px;
	overflow: hidden;
	padding: 0;
	position: absolute;
	word-wrap: normal !important;
}

.skip-link {
	position: absolute;
	left: -9999px;
	top: 0;
	z-index: 9999;
	background: var(--accent);
	color: #fff;
	padding: 0.75rem 1.25rem;
	border-radius: 0 0 var(--radius) 0;
}

.skip-link:focus {
	left: 0;
	color: #fff;
}

.text-center {
	text-align: center;
}

.mt-lg {
	margin-top: var(--space-lg);
}

.disclaimer {
	font-size: var(--fs-xs);
	color: var(--text-muted);
}

/* Бейдж-плашка «расчёт актуальный» */
.badge-accurate {
	display: inline-flex;
	align-items: center;
	gap: 0.6rem;
	background: var(--accent-soft);
	color: var(--accent-hover);
	border: 1px solid var(--border-strong);
	border-radius: var(--radius-pill);
	padding: 0.6rem 1.2rem;
	font-weight: 600;
	font-size: var(--fs-sm);
}

.badge-accurate svg {
	width: 20px;
	height: 20px;
	flex: none;
}

/* Оверлей мобильного меню */
.nav-backdrop {
	position: fixed;
	inset: 0;
	background: rgba(15, 13, 10, 0.5);
	opacity: 0;
	visibility: hidden;
	transition: opacity var(--transition);
	z-index: 90;
}

body.menu-open .nav-backdrop {
	opacity: 1;
	visibility: visible;
}

/* --- Планшеты --- */
@media (max-width: 1024px) {
	.footer-grid {
		grid-template-columns: 1fr 1fr;
	}

	.grid--4 {
		grid-template-columns: repeat(2, 1fr);
	}

	.cta-band {
		grid-template-columns: 1fr;
	}

	.cta-band__actions {
		flex-direction: row;
		flex-wrap: wrap;
	}
}

/* --- Мобильное меню --- */
@media (max-width: 880px) {
	.menu-toggle {
		display: inline-flex;
		order: 3;
	}

	.header-phone span {
		display: none;
	}

	.main-navigation {
		position: fixed;
		top: 0;
		right: 0;
		bottom: 0;
		width: min(86vw, 360px);
		background: var(--surface);
		padding: calc(var(--header-h) + 1.5rem) var(--gutter) 2rem;
		transform: translateX(100%);
		transition: transform var(--transition);
		z-index: 95;
		overflow-y: auto;
		box-shadow: var(--shadow-lg);
		margin-left: 0;
	}

	body.menu-open .main-navigation {
		transform: translateX(0);
	}

	.main-navigation ul {
		flex-direction: column;
		align-items: stretch;
		gap: 0.25rem;
	}

	.main-navigation a {
		padding: 0.85rem 0;
		font-size: 1.1rem;
		border-bottom: 1px solid var(--border);
	}

	.main-navigation a::after {
		display: none;
	}

	.main-navigation .menu-item--accent a,
	.main-navigation .menu-item-calculator a {
		justify-content: center;
		margin-top: 0.75rem;
		border-bottom: none;
	}
}

/* --- Телефоны --- */
@media (max-width: 680px) {
	.grid--2,
	.grid--3,
	.grid--4,
	.reviews-grid,
	.video-reviews,
	.steps,
	.stats,
	.hero-strip__inner {
		grid-template-columns: 1fr;
	}

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

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

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

	.header-phone {
		display: none;
	}

	.hero__arrow {
		width: 42px;
		height: 42px;
		top: auto;
		bottom: 1.2rem;
		transform: none;
	}

	.hero__arrow--prev {
		left: auto;
		right: 4.2rem;
	}

	.hero__arrow--next {
		right: 1rem;
	}

	.hero__dots {
		left: 1rem;
		transform: none;
		bottom: 1.7rem;
	}

	.hero__actions .btn {
		width: 100%;
	}
}

/* Формы */
.field {
	display: flex;
	flex-direction: column;
	gap: 0.4rem;
	margin-bottom: var(--space-sm);
}

.field label {
	font-size: var(--fs-sm);
	font-weight: 600;
	color: var(--heading);
}

.field input,
.field select,
.field textarea {
	width: 100%;
	padding: 0.8rem 1rem;
	font-family: inherit;
	font-size: var(--fs-base);
	color: var(--text);
	background: var(--surface);
	border: 1px solid var(--border-strong);
	border-radius: var(--radius);
	transition: border-color var(--transition), box-shadow var(--transition);
}

.field input:focus,
.field select:focus,
.field textarea:focus {
	outline: none;
	border-color: var(--accent);
	box-shadow: var(--ring);
}

/* Модальное окно */
.modal {
	position: fixed;
	inset: 0;
	z-index: 200;
	display: flex;
	align-items: center;
	justify-content: center;
	padding: var(--gutter);
}

.modal[hidden] {
	display: none;
}

.modal__backdrop {
	position: absolute;
	inset: 0;
	background: rgba(15, 13, 10, 0.6);
	-webkit-backdrop-filter: blur(3px);
	backdrop-filter: blur(3px);
}

.modal__dialog {
	position: relative;
	z-index: 1;
	width: 100%;
	max-width: 440px;
	background: var(--surface);
	border-radius: var(--radius-lg);
	padding: clamp(1.5rem, 4vw, 2.5rem);
	box-shadow: var(--shadow-lg);
}

.modal__close {
	position: absolute;
	top: 0.75rem;
	right: 0.9rem;
	width: 40px;
	height: 40px;
	border: none;
	background: transparent;
	font-size: 2rem;
	line-height: 1;
	color: var(--text-muted);
	border-radius: 50%;
}

.modal__close:hover {
	color: var(--accent);
	background: var(--surface-2);
}

.modal__dialog h3 {
	margin-bottom: 0.5rem;
}

.modal__dialog .lead {
	margin-bottom: var(--space-md);
	font-size: var(--fs-sm);
}

.callback-form__success {
	text-align: center;
	padding: var(--space-md) 0;
}

.callback-form__success svg {
	width: 56px;
	height: 56px;
	color: var(--accent);
	margin: 0 auto var(--space-sm);
}

body.modal-open {
	overflow: hidden;
}

/* Оверлей увеличенной картинки (лупа) */
.zoom-overlay {
	position: fixed;
	inset: 0;
	z-index: 300;
	background: rgba(15, 13, 10, 0.85);
	display: flex;
	align-items: center;
	justify-content: center;
	padding: var(--gutter);
	cursor: zoom-out;
}

.zoom-overlay img {
	max-width: min(92vw, 1100px);
	max-height: 90vh;
	border-radius: var(--radius);
	box-shadow: var(--shadow-lg);
}

/* Уважение к prefers-reduced-motion */
@media (prefers-reduced-motion: reduce) {
	*,
	*::before,
	*::after {
		transition-duration: 0.01ms !important;
		scroll-behavior: auto !important;
	}
}