/* =========================================================================
   КСЭ — Комплексные строительно-инженерные экосистемы
   style.css · единый файл стилей, mobile-first
   Структура:
   01. Токены дизайн-системы
   02. Сброс и базовая типографика
   03. Утилиты и примитивы раскладки
   04. Кнопки и ссылки
   05. Шапка, навигация, мобильное меню
   06. Hero
   07. Заголовки секций
   08. Карточки, сетки, диаграмма «экосистема»
   09. Процесс, split-блоки, проекты, галерея
   10. FAQ, форма, контакты
   11. Подвал и плавающие элементы
   12. Лайтбокс
   13. Анимации появления и печать
   ========================================================================= */

/* ======================= 01. ТОКЕНЫ ====================================== */
:root {
  /* Палитра — светлая тема */
  --bg:            #FBF8F3;
  --bg-alt:        #F4EDE2;
  --surface:       #FFFFFF;
  --surface-2:     #FAF6EF;
  --ink:           #1E1813;
  --ink-2:         #5F5143;
  --ink-3:         #6E5F4C;
  --heading:       #38200F;
  --accent:        #C9811A;   /* графика, рамки, иконки — не для текста */
  --accent-ink:    #8E560C;   /* акцентный ТЕКСТ: 5.7:1 на кремовом */
  --accent-soft:   #F0D9B0;
  /* Заливка кнопок: белое на #C9811A даёт лишь 3.16:1, поэтому фон темнее */
  --btn-bg-base:   #8E560C;
  --btn-fg-base:   #FFFFFF;
  --btn-bg-hover:  #7A490A;
  --line:          #E2D6C4;
  --line-strong:   #CDBCA2;
  --shadow-color:  28 20 12;

  /* Типографика */
  --font-display: "Cormorant Garamond", "Cormorant", Georgia, "Times New Roman", serif;
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

  --step--1: clamp(0.82rem, 0.79rem + 0.13vw, 0.89rem);
  --step-0:  clamp(1rem, 0.96rem + 0.19vw, 1.09rem);
  --step-1:  clamp(1.13rem, 1.06rem + 0.33vw, 1.31rem);
  --step-2:  clamp(1.35rem, 1.22rem + 0.63vw, 1.72rem);
  --step-3:  clamp(1.62rem, 1.38rem + 1.15vw, 2.3rem);
  --step-4:  clamp(1.94rem, 1.5rem + 2.1vw, 3.05rem);
  --step-5:  clamp(2.3rem, 1.55rem + 3.6vw, 4.2rem);

  /* Ритм и геометрия */
  --container: 74rem;
  --gutter: clamp(1.25rem, 0.9rem + 1.8vw, 2.5rem);
  --section-y: clamp(3.75rem, 2.5rem + 6vw, 7.5rem);
  --radius-sm: 4px;
  --radius: 8px;
  --radius-lg: 16px;
  --header-h: 68px;

  --shadow-1: 0 1px 2px rgb(var(--shadow-color) / .05), 0 4px 14px rgb(var(--shadow-color) / .05);
  --shadow-2: 0 2px 6px rgb(var(--shadow-color) / .07), 0 18px 44px rgb(var(--shadow-color) / .1);
  --shadow-3: 0 4px 12px rgb(var(--shadow-color) / .1), 0 32px 70px rgb(var(--shadow-color) / .18);

  --ease: cubic-bezier(.22, .61, .36, 1);
  --dur: .32s;

  color-scheme: light;
}

:root[data-theme="dark"] {
  --bg:            #15110D;
  --bg-alt:        #1C1713;
  --surface:       #211B16;
  --surface-2:     #1A1511;
  --ink:           #F3ECE1;
  --ink-2:         #BCAB95;
  --ink-3:         #93826C;
  --heading:       #F6EFE4;
  --accent:        #E3A445;
  --accent-ink:    #EDB75F;
  --accent-soft:   #4A3415;
  /* На тёмном фоне кнопка светлая, текст на ней — тёмный */
  --btn-bg-base:   #E3A445;
  --btn-fg-base:   #15110D;
  --btn-bg-hover:  #EDB75F;
  --line:          #342B22;
  --line-strong:   #4A3D30;
  --shadow-color:  0 0 0;

  --shadow-1: 0 1px 2px rgb(0 0 0 / .4), 0 4px 14px rgb(0 0 0 / .3);
  --shadow-2: 0 2px 6px rgb(0 0 0 / .45), 0 18px 44px rgb(0 0 0 / .4);
  --shadow-3: 0 4px 12px rgb(0 0 0 / .5), 0 32px 70px rgb(0 0 0 / .55);

  color-scheme: dark;
}

@media (min-width: 48rem) {
  :root { --header-h: 84px; }
}

/* ======================= 02. СБРОС ======================================= */
*, *::before, *::after { box-sizing: border-box; }

* { margin: 0; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 1.5rem);
  text-size-adjust: 100%;
}

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: var(--step-0);
  line-height: 1.65;
  font-synthesis-weight: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-wrap: break-word;
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

body.is-locked { overflow: hidden; }

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

input, button, textarea, select { font: inherit; color: inherit; }

button { background: none; border: 0; cursor: pointer; }

ul, ol { list-style: none; padding: 0; }

a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: .22em; }

:where(h1, h2, h3, h4) {
  font-family: var(--font-display);
  color: var(--heading);
  font-weight: 600;
  line-height: 1.12;
  letter-spacing: -0.005em;
  text-wrap: balance;
}

h1 { font-size: var(--step-5); }
h2 { font-size: var(--step-4); }
h3 { font-size: var(--step-2); }
h4 { font-size: var(--step-1); }

p { text-wrap: pretty; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}

::selection { background: var(--btn-bg-base); color: var(--btn-fg-base); }

/* ======================= 03. УТИЛИТЫ ==================================== */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.container--narrow { max-width: 50rem; }

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

.section--alt {
  background: var(--bg-alt);
  border-block: 1px solid var(--line);
}

.section--dark {
  background: #15110D;
  color: #E9E0D2;
  --heading: #F7F0E5;
  --ink: #E9E0D2;
  --ink-2: #B5A38C;
  --ink-3: #93826C;
  --line: #352C23;
  --line-strong: #4C3E30;
  --surface: #1E1813;
  --accent-ink: #E3A445;
}

/* Отложенный рендер контента ниже первого экрана */
.section--deferred {
  content-visibility: auto;
  contain-intrinsic-size: auto 900px;
}

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  top: .5rem; left: .5rem;
  z-index: 200;
  padding: .75rem 1.25rem;
  background: var(--btn-bg-base);
  color: var(--btn-fg-base);
  font-weight: 600;
  border-radius: var(--radius-sm);
  transform: translateY(-200%);
  transition: transform .2s var(--ease);
}
.skip-link:focus-visible { transform: translateY(0); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  font-size: var(--step--1);
  font-weight: 600;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--accent-ink);
}
.eyebrow::before {
  content: "";
  width: 1.75rem;
  height: 1px;
  background: currentColor;
  flex: none;
}
.eyebrow--center::before { display: none; }

.lead {
  font-size: var(--step-1);
  line-height: 1.6;
  color: var(--ink-2);
}

.muted { color: var(--ink-2); }

.rule {
  width: 3.5rem; height: 2px;
  background: var(--accent);
  border: 0;
  margin-block: 1.75rem;
}

/* ======================= 04. КНОПКИ ===================================== */
.btn {
  --btn-bg: var(--btn-bg-base);
  --btn-fg: var(--btn-fg-base);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .6rem;
  min-height: 3rem;
  padding: .75rem 1.6rem;
  background: var(--btn-bg);
  color: var(--btn-fg);
  font-size: var(--step--1);
  font-weight: 600;
  letter-spacing: .07em;
  text-transform: uppercase;
  text-decoration: none;
  border: 1px solid var(--btn-bg);
  border-radius: var(--radius-sm);
  text-align: center;
  transition: background-color var(--dur) var(--ease),
              border-color var(--dur) var(--ease),
              color var(--dur) var(--ease),
              transform var(--dur) var(--ease),
              box-shadow var(--dur) var(--ease);
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-2);
  background: var(--btn-bg-hover);
  border-color: var(--btn-bg-hover);
}
.btn--ghost:hover, .btn--light:hover { background: transparent; }
.btn:active { transform: translateY(0); box-shadow: none; }
.btn[disabled] { opacity: .55; pointer-events: none; }

.btn--ghost {
  --btn-bg: transparent;
  --btn-fg: var(--heading);
  border-color: var(--line-strong);
}
.btn--ghost:hover { border-color: var(--accent); color: var(--accent-ink); }

.btn--light {
  --btn-bg: transparent;
  --btn-fg: #F3ECE1;
  border-color: rgb(255 255 255 / .28);
}
.btn--light:hover { border-color: var(--accent); color: var(--accent); }

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

.btn svg { width: 1.05em; height: 1.05em; flex: none; }

/* Текстовая ссылка со стрелкой */
.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  font-size: var(--step--1);
  font-weight: 600;
  letter-spacing: .07em;
  text-transform: uppercase;
  color: var(--accent-ink);
  text-decoration: none;
  padding-bottom: 3px;
  border-bottom: 1px solid currentColor;
  transition: gap var(--dur) var(--ease), color var(--dur) var(--ease);
}
.link-arrow:hover { gap: .85rem; color: var(--accent); }
.link-arrow svg { width: .9em; height: .9em; }

/* ======================= 05. ШАПКА ====================================== */
.progress {
  position: fixed;
  inset-block-start: 0;
  inset-inline: 0;
  height: 2px;
  z-index: 120;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: 0 50%;
  will-change: transform;
  pointer-events: none;
}

.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgb(from var(--bg) r g b / .82);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

@supports not (background: rgb(from white r g b / .5)) {
  .header { background: var(--bg); }
}

@supports (backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px)) {
  .header {
    -webkit-backdrop-filter: blur(14px) saturate(1.4);
    backdrop-filter: blur(14px) saturate(1.4);
  }
}

.header.is-stuck {
  border-bottom-color: var(--line);
  box-shadow: var(--shadow-1);
}

.header__bar {
  display: flex;
  align-items: center;
  gap: 1rem;
  /* min-height, а не height: при длинном тексте жёсткая высота даёт переполнение,
     и логотип с подписью наезжают на меню */
  min-height: var(--header-h);
}

.brand {
  display: flex;
  align-items: center;
  gap: .7rem;
  text-decoration: none;
  margin-inline-end: auto;
  min-width: 0;
}
.brand img {
  width: 40px; height: 41px;
  object-fit: contain;
  flex: none;
}
/* Обёртка названия: именно её отсутствие ломало выравнивание —
   inline-span с блочным потомком внутри flex-строки */
.brand__text {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-width: 0;
}
.brand__name {
  display: block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.4rem;
  letter-spacing: .1em;
  color: var(--heading);
  line-height: 1.05;
  white-space: nowrap;
}
/* Подписи «Строительно-инженерные экосистемы» в шапке намеренно нет:
   контейнер ограничен 74rem, и вместе с шестью пунктами меню, телефоном
   и кнопкой она не помещается ни при какой ширине экрана — переносилась
   на три строки и наезжала на навигацию. Эта формулировка есть в первом
   экране и в подвале, где для неё достаточно места. */

.nav { display: none; }

.nav__list { display: flex; align-items: center; gap: clamp(1rem, 2.2vw, 2rem); }

.nav__link {
  position: relative;
  display: block;
  padding: .45rem 0;
  font-size: var(--step--1);
  font-weight: 500;
  letter-spacing: .05em;
  text-decoration: none;
  color: var(--ink);
  white-space: nowrap;
  transition: color var(--dur) var(--ease);
}
.nav__link::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 1.5px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur) var(--ease);
}
.nav__link:hover { color: var(--accent-ink); }
.nav__link:hover::after,
.nav__link.is-active::after { transform: scaleX(1); }
.nav__link.is-active { color: var(--accent-ink); }

.header__actions { display: flex; align-items: center; gap: .5rem; flex: none; }

.header__phone {
  display: none;
  font-weight: 600;
  font-size: var(--step--1);
  letter-spacing: .02em;
  text-decoration: none;
  white-space: nowrap;
  color: var(--heading);
  transition: color var(--dur) var(--ease);
}
.header__phone:hover { color: var(--accent-ink); }

.header__cta { display: none; }

.icon-btn {
  display: inline-grid;
  place-items: center;
  width: 44px; height: 44px;
  border-radius: var(--radius-sm);
  color: var(--heading);
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.icon-btn:hover { background: var(--bg-alt); color: var(--accent-ink); }
.icon-btn svg { width: 20px; height: 20px; }

.theme-toggle .icon-sun { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
:root[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

/* Бургер */
.burger span {
  display: block;
  width: 22px; height: 1.5px;
  background: currentColor;
  border-radius: 2px;
  transition: transform var(--dur) var(--ease), opacity .2s linear;
}
.burger span + span { margin-top: 6px; }
.burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
.burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

/* Мобильное меню */
.drawer {
  position: fixed;
  inset: var(--header-h) 0 0 0;
  z-index: 95;
  display: flex;
  flex-direction: column;
  padding: 1.5rem var(--gutter) 2.5rem;
  background: var(--bg);
  border-top: 1px solid var(--line);
  overflow-y: auto;
  overscroll-behavior: contain;
  visibility: hidden;
  opacity: 0;
  transform: translateY(-8px);
  transition: opacity .25s var(--ease), transform .25s var(--ease), visibility .25s;
}
.drawer.is-open { visibility: visible; opacity: 1; transform: translateY(0); }

.drawer__list { display: flex; flex-direction: column; }
.drawer__list a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.05rem .25rem;
  font-family: var(--font-display);
  font-size: var(--step-2);
  color: var(--heading);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
}
.drawer__list a::after {
  content: "";
  width: 7px; height: 7px;
  border-right: 1.5px solid var(--accent);
  border-bottom: 1.5px solid var(--accent);
  transform: rotate(-45deg);
  flex: none;
}
.drawer__foot { margin-top: auto; padding-top: 2rem; display: grid; gap: .9rem; }
.drawer__phone {
  font-size: var(--step-2);
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--heading);
  text-decoration: none;
}

/* Полное меню появляется только когда шесть пунктов гарантированно помещаются */
@media (min-width: 68rem) {
  .nav { display: block; }
  .burger { display: none; }
  .drawer { display: none; }
  .brand img { width: 46px; height: 47px; }
  .header__cta { display: inline-flex; }
  .nav__list { margin-inline-end: clamp(1rem, 2.5vw, 2.25rem); }
}

/* Телефон в шапке — только там, где он не выдавливает навигацию */
@media (min-width: 86rem) {
  .header__phone { display: inline-flex; }
}

/* ======================= 06. HERO ======================================= */
.hero {
  position: relative;
  padding-block: clamp(2.5rem, 1.5rem + 5vw, 5.5rem) clamp(3rem, 2rem + 5vw, 6rem);
  overflow: clip;
}

.hero__grid {
  display: grid;
  gap: clamp(2.25rem, 1rem + 5vw, 4rem);
  align-items: center;
}

.hero__mark {
  position: relative;
  display: grid;
  place-items: center;
  order: -1;
  isolation: isolate;
}

.hero__glow {
  position: absolute;
  inset: -22%;
  z-index: -1;
  background: radial-gradient(circle at 50% 48%,
              rgb(201 129 26 / .26), rgb(201 129 26 / .07) 45%, transparent 68%);
  pointer-events: none;
}

.hero__ring {
  position: absolute;
  inset: 2%;
  z-index: -1;
  border-radius: 50%;
  border: 1px dashed var(--line-strong);
  opacity: .8;
  animation: spin 220s linear infinite;
}
.hero__ring--2 {
  inset: -9%;
  border-style: solid;
  border-color: var(--line);
  animation-direction: reverse;
  animation-duration: 300s;
}

@keyframes spin { to { transform: rotate(360deg); } }

.hero__logo {
  width: min(62vw, 17rem);
  height: auto;
  filter: drop-shadow(0 18px 40px rgb(var(--shadow-color) / .3));
}

.hero__title { margin-top: .35rem; }
.hero__title .accent { color: var(--accent-ink); }

.hero__lead { margin-top: 1.25rem; max-width: 34ch; }

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .85rem;
  margin-top: 2rem;
}

.hero__note {
  margin-top: 1.5rem;
  font-size: var(--step--1);
  color: var(--ink-3);
  display: flex;
  align-items: center;
  gap: .5rem;
}
.hero__note svg { width: 1.1em; height: 1.1em; color: var(--accent); flex: none; }

/* Полоса фактов */
.facts {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  margin-top: clamp(2.5rem, 1.5rem + 4vw, 4.5rem);
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.fact {
  background: var(--bg);
  padding: clamp(1.1rem, .8rem + 1.2vw, 1.75rem) clamp(1rem, .7rem + 1vw, 1.5rem);
}
.fact__value {
  font-family: var(--font-display);
  font-size: var(--step-4);
  font-weight: 700;
  line-height: 1;
  color: var(--accent-ink);
  display: flex;
  align-items: baseline;
  gap: .12em;
}
.fact__value .unit { font-size: .45em; font-weight: 600; letter-spacing: .02em; }
.fact__label {
  margin-top: .6rem;
  font-size: var(--step--1);
  line-height: 1.45;
  color: var(--ink-2);
}

@media (min-width: 48rem) {
  .facts { grid-template-columns: repeat(4, 1fr); }
}

@media (min-width: 62rem) {
  .hero__grid { grid-template-columns: 1.05fr .95fr; }
  .hero__mark { order: 0; }
  .hero__logo { width: min(26vw, 21rem); }
}

/* ======================= 07. ЗАГОЛОВКИ СЕКЦИЙ =========================== */
.section__head { max-width: 46rem; margin-bottom: clamp(2.25rem, 1.5rem + 3vw, 3.75rem); }
.section__head h2 { margin-top: .85rem; }
.section__head p { margin-top: 1.1rem; }
.section__head--center { margin-inline: auto; text-align: center; }
.section__head--center .eyebrow::before { display: none; }

/* ======================= 08. КАРТОЧКИ И СЕТКИ =========================== */
.grid { display: grid; gap: clamp(1rem, .6rem + 1.6vw, 1.75rem); }
.grid--2 { grid-template-columns: 1fr; }
.grid--3 { grid-template-columns: 1fr; }
.grid--4 { grid-template-columns: 1fr; }

@media (min-width: 36rem) {
  .grid--2, .grid--4 { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 62rem) {
  .grid--3 { grid-template-columns: repeat(3, 1fr); }
  .grid--4 { grid-template-columns: repeat(4, 1fr); }
}

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: clamp(1.5rem, 1.1rem + 1.4vw, 2.1rem);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: transform var(--dur) var(--ease),
              border-color var(--dur) var(--ease),
              box-shadow var(--dur) var(--ease);
}
.card:hover {
  transform: translateY(-4px);
  border-color: var(--line-strong);
  box-shadow: var(--shadow-2);
}
.card__icon {
  display: grid;
  place-items: center;
  width: 3rem; height: 3rem;
  margin-bottom: 1.25rem;
  color: var(--accent-ink);
  background: var(--accent-soft);
  border-radius: var(--radius-sm);
}
.card__icon svg { width: 1.5rem; height: 1.5rem; }
.card h3 { margin-bottom: .7rem; }
.card p { color: var(--ink-2); font-size: var(--step-0); }
.card__num {
  position: absolute;
  top: 1.1rem; right: 1.25rem;
  font-family: var(--font-display);
  font-size: var(--step-2);
  font-weight: 700;
  color: var(--line-strong);
  line-height: 1;
}

/* Карточка с фотографией сверху */
.card--media { padding: 0; overflow: hidden; }
.card__media {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  transition: transform .5s var(--ease);
}
.card--media:hover .card__media { transform: scale(1.04); }
.card__body {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: clamp(1.25rem, 1rem + 1vw, 1.75rem);
}

/* Список-преимущества с галочками */
.checks { display: grid; gap: 1rem; }
.checks li {
  display: grid;
  grid-template-columns: 1.6rem 1fr;
  gap: .9rem;
  align-items: start;
  font-size: var(--step-0);
  color: var(--ink-2);
}
.checks li::before {
  content: "";
  width: 1.6rem; height: 1.6rem;
  margin-top: .1rem;
  border-radius: 50%;
  background: var(--accent-soft) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%238E560C' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E") center / .85rem no-repeat;
}
.checks strong { color: var(--heading); font-weight: 600; display: block; }
.section--dark .checks li::before {
  background-color: rgb(227 164 69 / .16);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23E3A445' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E");
}

/* Диаграмма «экосистема» */
.eco { display: grid; gap: clamp(2rem, 1rem + 4vw, 3.5rem); align-items: center; }

.eco__stage { display: none; }

.eco__list { display: grid; gap: .75rem; }

.eco__node {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  align-items: start;
  padding: 1.1rem 1.25rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.eco__node:hover { border-color: var(--accent); }
.eco__dot {
  width: .55rem; height: .55rem;
  margin-top: .6rem;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
  flex: none;
}
.eco__label {
  font-family: var(--font-display);
  font-size: var(--step-1);
  font-weight: 600;
  color: var(--heading);
  line-height: 1.2;
}
.eco__desc { font-size: var(--step--1); color: var(--ink-2); margin-top: .3rem; }

@media (min-width: 62rem) {
  .eco { grid-template-columns: 1fr 1fr; }

  .eco__stage {
    position: relative;
    display: block;
    width: min(100%, 28rem);
    aspect-ratio: 1;
    margin-inline: auto;
  }
  .eco__orbit {
    position: absolute;
    inset: 0;
    border-radius: 50%;
    border: 1px solid var(--line);
  }
  .eco__orbit--dash {
    inset: 11%;
    border: 1px dashed var(--line-strong);
    animation: spin 190s linear infinite;
  }
  .eco__orbit--glow {
    inset: 22%;
    border: 0;
    background: radial-gradient(circle, rgb(201 129 26 / .18), transparent 70%);
  }
  .eco__core {
    position: absolute;
    top: 50%; left: 50%;
    width: 36%;
    translate: -50% -50%;
  }
  .eco__pin {
    position: absolute;
    top: 50%; left: 50%;
    width: 9.5rem;
    margin: -1.4rem 0 0 -4.75rem;
    text-align: center;
    translate: 0 0;
    transform: rotate(var(--a)) translate(13.1rem) rotate(calc(-1 * var(--a)));
  }
  .eco__pin .dot {
    width: .5rem; height: .5rem;
    margin: 0 auto .55rem;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 0 5px var(--accent-soft);
  }
  .eco__pin .txt {
    font-size: var(--step--1);
    font-weight: 600;
    letter-spacing: .06em;
    text-transform: uppercase;
    color: var(--heading);
  }
}

/* ======================= 09. ПРОЦЕСС / SPLIT / ПРОЕКТЫ ================== */
.process { display: grid; gap: 0; counter-reset: step; }

.step {
  position: relative;
  display: grid;
  grid-template-columns: 3.25rem 1fr;
  gap: 1.25rem;
  padding-bottom: 2.25rem;
}
.step:last-child { padding-bottom: 0; }
.step::before {
  counter-increment: step;
  content: "0" counter(step);
  display: grid;
  place-items: center;
  width: 3.25rem; height: 3.25rem;
  font-family: var(--font-display);
  font-size: var(--step-1);
  font-weight: 700;
  color: var(--accent-ink);
  background: var(--bg);
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  z-index: 1;
}
.step:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 3.5rem; bottom: .5rem;
  left: 1.625rem;
  width: 1px;
  background: var(--line);
}
.step h3 { margin-bottom: .5rem; padding-top: .55rem; }
.step p { color: var(--ink-2); }

@media (min-width: 62rem) {
  .process { grid-template-columns: repeat(5, 1fr); gap: 1.5rem; }
  .step { grid-template-columns: 1fr; gap: 1.1rem; padding-bottom: 0; }
  .step:not(:last-child)::after {
    top: 1.625rem; bottom: auto; left: 3.75rem; right: -1.5rem;
    width: auto; height: 1px;
  }
  .step h3 { padding-top: 0; font-size: var(--step-1); }
  .step p { font-size: var(--step--1); }
}

/* Split: текст + изображение */
.split { display: grid; gap: clamp(2rem, 1rem + 4vw, 3.75rem); align-items: center; }
.split__media { position: relative; border-radius: var(--radius); overflow: hidden; }
.split__media img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.split__badge {
  position: absolute;
  left: 1rem; bottom: 1rem;
  display: grid;
  gap: .15rem;
  padding: .9rem 1.25rem;
  background: rgb(21 17 13 / .82);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border-radius: var(--radius-sm);
  color: #F3ECE1;
}
.split__badge b {
  font-family: var(--font-display);
  font-size: var(--step-3);
  font-weight: 700;
  line-height: 1;
  color: var(--accent);
}
.split__badge span { font-size: var(--step--1); color: #C4B299; }

@media (min-width: 62rem) {
  .split { grid-template-columns: 1fr 1fr; }
  .split--reverse .split__media { order: 2; }
  .split__media img { aspect-ratio: 5 / 4; }
}

/* Проекты */
.project {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.project:hover { transform: translateY(-4px); box-shadow: var(--shadow-2); }
.project__media { position: relative; overflow: hidden; background: var(--bg-alt); }
.project__media img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  transition: transform .5s var(--ease);
}
.project:hover .project__media img { transform: scale(1.04); }
.project__year {
  position: absolute;
  top: .85rem; left: .85rem;
  padding: .3rem .7rem;
  font-size: var(--step--1);
  font-weight: 600;
  letter-spacing: .1em;
  color: #15110D;
  background: var(--accent);
  border-radius: var(--radius-sm);
}
.project__body { padding: clamp(1.25rem, 1rem + 1vw, 1.75rem); display: flex; flex-direction: column; flex: 1; }
.project__body h3 { font-size: var(--step-2); margin-bottom: 1.1rem; }
.project__rows { margin-top: auto; display: grid; gap: 0; }
.project__rows div {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  align-items: baseline;
  padding: .65rem 0;
  border-top: 1px solid var(--line);
  font-size: var(--step--1);
}
.project__rows dt {
  color: var(--ink-3);
  text-transform: uppercase;
  letter-spacing: .06em;
  font-size: .78em;
}
.project__rows dd { margin: 0; text-align: right; color: var(--heading); font-weight: 500; }

/* Галерея: фильтры */
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin-bottom: 1.5rem;
}
.filter {
  min-height: 2.75rem;
  padding: .5rem 1.1rem;
  font-size: var(--step--1);
  font-weight: 600;
  letter-spacing: .04em;
  color: var(--ink-2);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 999px;
  transition: color var(--dur) var(--ease),
              background-color var(--dur) var(--ease),
              border-color var(--dur) var(--ease);
}
.filter:hover { border-color: var(--line-strong); color: var(--heading); }
.filter.is-active {
  color: var(--btn-fg-base);
  background: var(--btn-bg-base);
  border-color: var(--btn-bg-base);
}

.gallery__empty {
  margin-bottom: 1rem;
  font-size: var(--step--1);
  color: var(--ink-3);
}
.gallery__item[hidden] { display: none; }

/* Галерея */
.gallery {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: clamp(.5rem, .3rem + .8vw, .9rem);
}

@media (min-width: 48rem) { .gallery { grid-template-columns: repeat(3, 1fr); } }
@media (min-width: 62rem) { .gallery { grid-template-columns: repeat(4, 1fr); } }

.gallery__item {
  position: relative;
  display: block;
  padding: 0;
  border: 0;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--bg-alt);
  cursor: zoom-in;
}
.gallery__item img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  transition: transform .5s var(--ease), opacity var(--dur) var(--ease);
}
.gallery__item:hover img { transform: scale(1.06); opacity: .88; }
.gallery__item--wide { grid-column: span 2; }
.gallery__item--wide img { aspect-ratio: 2 / 1; }

.gallery__play {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  background: rgb(21 17 13 / .35);
  color: #fff;
  pointer-events: none;
}
.gallery__play svg {
  width: 3.25rem; height: 3.25rem;
  filter: drop-shadow(0 4px 12px rgb(0 0 0 / .5));
}

/* Цитата */
.quote {
  max-width: 44rem;
  margin-inline: auto;
  text-align: center;
}
.quote blockquote {
  font-family: var(--font-display);
  font-size: var(--step-3);
  line-height: 1.32;
  color: var(--heading);
  text-wrap: balance;
}
.quote figcaption {
  margin-top: 1.5rem;
  font-size: var(--step--1);
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--ink-3);
}

/* ======================= 10. FAQ / ФОРМА ================================ */
.faq { max-width: 52rem; margin-inline: auto; display: grid; gap: .75rem; }

.faq__item {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color var(--dur) var(--ease);
}
.faq__item[open] { border-color: var(--line-strong); }

.faq__item summary {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1.25rem;
  padding: 1.15rem clamp(1rem, .8rem + .8vw, 1.5rem);
  font-family: var(--font-display);
  font-size: var(--step-1);
  font-weight: 600;
  color: var(--heading);
  cursor: pointer;
  list-style: none;
  line-height: 1.3;
}
.faq__item summary::-webkit-details-marker { display: none; }
.faq__item summary::after {
  content: "";
  width: 1.1rem; height: 1.1rem;
  margin-top: .25rem;
  flex: none;
  background: currentColor;
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='2.5' stroke-linecap='round'%3E%3Cpath d='M12 5v14M5 12h14'/%3E%3C/svg%3E") center / contain no-repeat;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='2.5' stroke-linecap='round'%3E%3Cpath d='M12 5v14M5 12h14'/%3E%3C/svg%3E") center / contain no-repeat;
  color: var(--accent-ink);
  transition: transform var(--dur) var(--ease);
}
.faq__item[open] summary::after { transform: rotate(135deg); }
.faq__answer { padding: 0 clamp(1rem, .8rem + .8vw, 1.5rem) 1.35rem; color: var(--ink-2); }
.faq__answer p + p { margin-top: .75rem; }

/* Форма */
.contact { display: grid; gap: clamp(2.25rem, 1.2rem + 4vw, 4rem); }

@media (min-width: 62rem) {
  .contact { grid-template-columns: .9fr 1.1fr; align-items: start; }
}

.contact__list { display: grid; gap: 0; margin-top: 2rem; }
.contact__list > div {
  display: grid;
  gap: .2rem;
  padding: 1rem 0;
  border-top: 1px solid var(--line);
}
.contact__list dt {
  font-size: var(--step--1);
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--ink-3);
}
.contact__list dd { margin: 0; font-size: var(--step-1); color: var(--heading); font-weight: 500; }
.contact__list a { text-decoration: none; transition: color var(--dur) var(--ease); }
.contact__list a:hover { color: var(--accent-ink); }
.contact__list address { font-style: normal; }
/* Реквизиты — справочная строка, не должна спорить с телефоном и почтой */
.contact__req {
  font-size: var(--step-0) !important;
  font-weight: 400 !important;
  color: var(--ink-2) !important;
  line-height: 1.5;
}

.form {
  padding: clamp(1.5rem, 1.1rem + 1.8vw, 2.5rem);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-1);
}

.form__grid { display: grid; gap: 1.1rem; }
@media (min-width: 36rem) { .form__row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1.1rem; } }

.field { display: grid; gap: .4rem; }
.field label {
  font-size: var(--step--1);
  font-weight: 600;
  letter-spacing: .04em;
  color: var(--ink-2);
}
.field label .req { color: var(--accent-ink); }

.field input,
.field textarea {
  width: 100%;
  min-height: 3rem;
  padding: .75rem .95rem;
  background: var(--bg);
  color: var(--ink);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.field textarea { min-height: 7rem; resize: vertical; }
.field input::placeholder,
.field textarea::placeholder { color: var(--ink-3); opacity: .75; }
.field input:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgb(201 129 26 / .18);
}
.field[data-invalid="true"] input,
.field[data-invalid="true"] textarea { border-color: #C0392B; }
.field__error {
  font-size: var(--step--1);
  color: #C0392B;
  min-height: 1em;
}
:root[data-theme="dark"] .field__error { color: #F07167; }
:root[data-theme="dark"] .field[data-invalid="true"] input,
:root[data-theme="dark"] .field[data-invalid="true"] textarea { border-color: #F07167; }

.consent {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: .75rem;
  align-items: start;
  font-size: var(--step--1);
  color: var(--ink-2);
  line-height: 1.5;
}
.consent input {
  width: 1.15rem; height: 1.15rem;
  margin-top: .18rem;
  accent-color: var(--accent);
  min-height: 0;
}
.consent a { color: var(--accent-ink); }

.hp { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }

.form__status {
  margin-top: 1rem;
  padding: .9rem 1.1rem;
  border-radius: var(--radius-sm);
  font-size: var(--step--1);
  display: none;
}
.form__status[data-state="ok"] {
  display: block;
  background: rgb(46 125 50 / .1);
  border: 1px solid rgb(46 125 50 / .35);
  color: #2E7D32;
}
.form__status[data-state="error"] {
  display: block;
  background: rgb(192 57 43 / .08);
  border: 1px solid rgb(192 57 43 / .35);
  color: #C0392B;
}
:root[data-theme="dark"] .form__status[data-state="ok"] { color: #86D98B; }
:root[data-theme="dark"] .form__status[data-state="error"] { color: #F07167; }

.form__alt {
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
  font-size: var(--step--1);
  color: var(--ink-3);
  text-align: center;
}
.form__alt a { color: var(--accent-ink); }

.spinner {
  width: 1em; height: 1em;
  border: 2px solid rgb(255 255 255 / .35);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin .7s linear infinite;
}

/* Текстовые страницы: политика, 404, благодарность */
.prose h2 {
  font-size: var(--step-2);
  margin-top: 2.5rem;
  margin-bottom: .85rem;
}
.prose p { color: var(--ink-2); }
.prose p + p { margin-top: .9rem; }
.prose ul { margin-block: 1.25rem; }
.prose a { color: var(--accent-ink); }

.page-center {
  display: grid;
  place-items: center;
  min-height: 70vh;
  text-align: center;
}
.page-center .btn { margin-top: 2rem; }
.page-center .code {
  font-family: var(--font-display);
  font-size: clamp(5rem, 3rem + 14vw, 11rem);
  font-weight: 700;
  line-height: .9;
  color: var(--accent);
  opacity: .22;
}

/* ======================= 11. ПОДВАЛ ===================================== */
.footer {
  background: var(--bg-alt);
  border-top: 1px solid var(--line);
  padding-block: clamp(2.5rem, 2rem + 2vw, 4rem) 2rem;
}
.footer__grid {
  display: grid;
  gap: 2rem;
  padding-bottom: 2.25rem;
  border-bottom: 1px solid var(--line);
}
@media (min-width: 48rem) { .footer__grid { grid-template-columns: 1.4fr 1fr 1fr; gap: 3rem; } }

.footer__brand { display: flex; align-items: center; gap: .75rem; text-decoration: none; }
.footer__brand img { width: 44px; height: 45px; }
.footer__about { margin-top: 1rem; max-width: 34ch; font-size: var(--step--1); color: var(--ink-2); }

.footer__title {
  font-size: var(--step--1);
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 1rem;
}
.footer__links { display: grid; gap: .6rem; font-size: var(--step--1); }
.footer__links a { text-decoration: none; color: var(--ink-2); transition: color var(--dur) var(--ease); }
.footer__links a:hover { color: var(--accent-ink); }

.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem 1.5rem;
  justify-content: space-between;
  padding-top: 1.5rem;
  font-size: var(--step--1);
  color: var(--ink-3);
}
.footer__bottom a { color: inherit; }

/* Плавающие элементы */
.to-top {
  position: fixed;
  right: clamp(1rem, 3vw, 2rem);
  bottom: clamp(1rem, 3vw, 2rem);
  z-index: 90;
  display: grid;
  place-items: center;
  width: 46px; height: 46px;
  background: var(--surface);
  color: var(--heading);
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  box-shadow: var(--shadow-2);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease), visibility var(--dur);
}
.to-top.is-visible { opacity: 1; visibility: visible; transform: translateY(0); }
.to-top:hover { color: var(--accent-ink); border-color: var(--accent); }
.to-top svg { width: 18px; height: 18px; }

@media (max-width: 67.99rem) {
  .to-top { bottom: calc(1rem + 60px); }

  .callbar {
    position: fixed;
    inset-inline: 0;
    bottom: 0;
    z-index: 91;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1px;
    background: var(--line);
    border-top: 1px solid var(--line);
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
    padding-bottom: env(safe-area-inset-bottom);
  }
  .callbar a {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: .5rem;
    min-height: 56px;
    background: var(--bg);
    color: var(--heading);
    font-size: var(--step--1);
    font-weight: 600;
    letter-spacing: .05em;
    text-transform: uppercase;
    text-decoration: none;
  }
  .callbar a.is-primary { background: var(--accent); color: #fff; }
  .callbar svg { width: 1.1em; height: 1.1em; }
  body { padding-bottom: 56px; }
}

.callbar { display: none; }
@media (max-width: 67.99rem) { .callbar { display: grid; } }

/* ======================= 12. ЛАЙТБОКС =================================== */
.lightbox {
  width: 100vw;
  max-width: 100vw;
  height: 100dvh;
  max-height: 100dvh;
  padding: 0;
  border: 0;
  background: rgb(14 11 8 / .96);
  color: #F3ECE1;
  overflow: hidden;
}
.lightbox::backdrop { background: rgb(14 11 8 / .92); }

.lightbox__stage {
  position: absolute;
  inset: 3.5rem 1rem 4rem;
  display: grid;
  place-items: center;
}
.lightbox__stage img,
.lightbox__stage video {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  object-fit: contain;
  border-radius: var(--radius-sm);
}

.lightbox__close {
  position: absolute;
  top: .75rem; right: .75rem;
  z-index: 2;
  display: grid;
  place-items: center;
  width: 44px; height: 44px;
  color: #F3ECE1;
  border-radius: 50%;
  background: rgb(255 255 255 / .08);
  transition: background-color var(--dur) var(--ease);
}
.lightbox__close:hover { background: rgb(255 255 255 / .18); }
.lightbox__close svg { width: 20px; height: 20px; }

.lightbox__nav {
  position: absolute;
  top: 50%;
  translate: 0 -50%;
  z-index: 2;
  display: grid;
  place-items: center;
  width: 48px; height: 48px;
  color: #F3ECE1;
  background: rgb(255 255 255 / .08);
  border-radius: 50%;
  transition: background-color var(--dur) var(--ease);
}
.lightbox__nav:hover { background: rgb(255 255 255 / .2); }
.lightbox__nav svg { width: 22px; height: 22px; }
.lightbox__nav--prev { left: .5rem; }
.lightbox__nav--next { right: .5rem; }

.lightbox__caption {
  position: absolute;
  inset-inline: 1rem;
  bottom: 1rem;
  text-align: center;
  font-size: var(--step--1);
  color: #C4B299;
}

/* ======================= 13. АНИМАЦИИ =================================== */
html.js .reveal {
  opacity: 0;
  transform: translateY(1.25rem);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
}
html.js .reveal.is-in { opacity: 1; transform: none; }

html.js .reveal-stagger > * {
  opacity: 0;
  transform: translateY(1.25rem);
  transition: opacity .6s var(--ease), transform .6s var(--ease);
}
html.js .reveal-stagger.is-in > * { opacity: 1; transform: none; }
html.js .reveal-stagger.is-in > *:nth-child(2) { transition-delay: .08s; }
html.js .reveal-stagger.is-in > *:nth-child(3) { transition-delay: .16s; }
html.js .reveal-stagger.is-in > *:nth-child(4) { transition-delay: .24s; }
html.js .reveal-stagger.is-in > *:nth-child(5) { transition-delay: .32s; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  html.js .reveal,
  html.js .reveal-stagger > * { opacity: 1 !important; transform: none !important; transition: none !important; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
}

@media print {
  .header, .drawer, .to-top, .callbar, .progress, .gallery, .form, .lightbox { display: none !important; }
  body { background: #fff; color: #000; }
  .section { padding-block: 1.25rem; }
  a[href^="http"]::after { content: " (" attr(href) ")"; font-size: .8em; }
}