/* Феррум Строй — стили лендинга.
   Палитра и типографика: стальной акцент на светлом фоне; кириллица
   подхватывается Saira Condensed / IBM Plex Sans поверх Barlow / Barlow Condensed
   (у этих шрифтов нет кириллических глифов, поэтому браузер сам берёт
   недостающие символы из следующего шрифта в стеке). */

:root {
  --color-bg: #f2f2f3;
  --color-surface: #e9e9ea;
  --color-text: #1d1f20;
  --color-accent: #5980a6;
  --color-accent-400: #94bce3;
  --color-accent-600: #597ea3;
  --color-accent-700: #416180;
  --color-divider: color-mix(in srgb, #1d1f20 16%, transparent);

  --color-neutral-100: #f5f5f8;
  --color-neutral-400: #b7b7ba;
  --color-neutral-500: #98989b;
  --color-neutral-600: #7a7a7d;
  --color-neutral-700: #5d5d60;
  --color-neutral-800: #424244;

  --font-heading: 'Barlow Condensed', 'Saira Condensed', sans-serif;
  --font-body: 'Barlow', 'IBM Plex Sans', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;
}

*, *::before, *::after { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  overflow-x: hidden;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.55;
}

h1, h2, h3 { margin: 0; font-family: var(--font-heading); line-height: 1.12; }
p { margin: 0; }
a { color: inherit; text-decoration: none; }
svg { flex: none; }

:focus { outline: none; }
:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }
::selection { background: color-mix(in srgb, var(--color-accent) 30%, transparent); }

.wrap {
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 28px);
}

/* — blueprint frame: hairline border + tick-mark corners — used on the logo
   mark, buttons, cards, project tiles and the request form — */
.blueprint { position: relative; border: 1px solid var(--color-divider); }
.blueprint > .corner { position: absolute; width: 11px; height: 11px; color: color-mix(in srgb, var(--color-text) 55%, transparent); }
.blueprint > .corner::before,
.blueprint > .corner::after { content: ""; position: absolute; background: currentColor; }
.blueprint > .corner::before { left: 5px; top: 0; width: 1px; height: 100%; }
.blueprint > .corner::after { top: 5px; left: 0; width: 100%; height: 1px; }
.blueprint > .corner.tl { top: -6px; left: -6px; }
.blueprint > .corner.tr { top: -6px; right: -6px; }
.blueprint > .corner.bl { bottom: -6px; left: -6px; }
.blueprint > .corner.br { bottom: -6px; right: -6px; }

/* — buttons — */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  cursor: pointer; text-decoration: none;
  font-family: var(--font-heading); font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.06em;
  font-size: 14px; color: var(--color-text);
  background: transparent; border: 1px solid var(--color-divider);
  padding: 13px 24px;
}
.btn-primary { background: var(--color-accent); color: var(--color-bg); border-color: var(--color-accent); }
.btn-primary:hover { background: var(--color-accent-600); }
.btn-primary:active { background: var(--color-accent-700); }
.btn-secondary:hover { background: color-mix(in srgb, var(--color-text) 7%, transparent); }
.btn-secondary:active { background: color-mix(in srgb, var(--color-text) 14%, transparent); }

/* — form fields — */
.field { display: grid; gap: 7px; }
.field-label {
  font-family: var(--font-mono); font-size: 11.5px; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--color-neutral-600);
}
.input {
  width: 100%; min-height: 36px; padding: 6px 10px;
  font-family: var(--font-body); font-size: 14px; color: var(--color-text);
  caret-color: var(--color-accent);
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: 0; appearance: none;
}
.input:hover { border-color: color-mix(in srgb, var(--color-text) 45%, transparent); }
.input:focus-visible { border-color: var(--color-accent); outline-offset: 0; }
input[type="tel"].input { font-family: var(--font-mono); }
select.input { background: transparent; }

/* — links that pick up the accent color on hover — */
.link-hover:hover { color: var(--color-accent-700); }

/* ── header ───────────────────────────────────────────────────────────── */
.site-header {
  position: sticky; top: 0; z-index: 20;
  background: color-mix(in srgb, var(--color-bg) 92%, transparent);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--color-divider);
}
.site-header .wrap {
  padding-block: 12px;
  display: flex; align-items: center; flex-wrap: wrap; gap: 12px 24px;
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--color-text); cursor: pointer; }
.brand-mark { width: 34px; height: 34px; display: grid; place-items: center; flex: none; }
.brand-name {
  font-family: var(--font-heading); font-size: 23px;
  letter-spacing: 0.06em; text-transform: uppercase;
}
.brand-name strong { font-weight: 700; }

.main-nav { display: flex; flex-wrap: wrap; gap: 10px 22px; margin-left: auto; min-width: 0; font-size: 14px; letter-spacing: 0.02em; }

.header-phone { font-family: var(--font-mono); font-size: 14px; white-space: nowrap; }

/* ── hero ─────────────────────────────────────────────────────────────── */
.hero {
  padding-block: clamp(32px, 6vw, 64px) 0;
  display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: clamp(28px, 4vw, 48px); align-items: center;
}
.hero-kicker {
  font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--color-accent-700);
  margin: 0 0 18px;
}
.hero-title {
  font-family: var(--font-heading); font-weight: 700; text-transform: uppercase;
  font-size: clamp(40px, 5.2vw, 68px); line-height: 0.98; letter-spacing: 0.01em;
  margin: 0 0 22px; text-wrap: balance;
}
.hero-title em { font-style: normal; color: var(--color-accent-700); }
.hero-subtitle {
  font-size: 17px; line-height: 1.62; max-width: 52ch;
  color: var(--color-neutral-800); margin: 0 0 30px; text-wrap: pretty;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.hero-art { position: relative; }
.hero-svg { display: block; width: 100%; overflow: visible; cursor: pointer; }

/* ── stats strip ──────────────────────────────────────────────────────── */
.stats { margin-top: 56px; }
.stats-grid {
  border-top: 1px solid var(--color-divider); border-bottom: 1px solid var(--color-divider);
  display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}
.stats-item { padding: 22px 24px; border-right: 1px solid var(--color-divider); }
.stats-item:first-child { padding-left: 0; }
.stats-item:last-child { padding-right: 0; border-right: none; }
.stats-label {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--color-neutral-600); margin: 0 0 8px;
}
.stats-value { font-family: var(--font-heading); font-size: 26px; text-transform: uppercase; }

/* ── generic section header (ЛИСТ NN) ─────────────────────────────────── */
.section { padding-block: clamp(48px, 9vw, 88px) 0; }
.section--tight { padding-block: clamp(36px, 6vw, 60px) 0; }
.section-header { display: flex; flex-wrap: wrap; align-items: baseline; gap: 6px 20px; margin-bottom: 34px; }
.section-label { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.16em; color: var(--color-accent-700); flex: none; }
.section-title {
  font-family: var(--font-heading); font-weight: 600; text-transform: uppercase;
  font-size: clamp(28px, 3.4vw, 44px); line-height: 1.02; text-wrap: balance;
  min-width: 0; overflow-wrap: break-word;
}
.section-note { font-family: var(--font-mono); font-size: 12px; color: var(--color-neutral-600); margin-left: auto; }

/* ── services (ЛИСТ 01) ───────────────────────────────────────────────── */
.services-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 26px; }
.service-card { padding: 26px; display: flex; flex-direction: column; gap: 6.8px; }
.service-card svg { margin-bottom: 18px; }
.service-title { font-family: var(--font-heading); font-weight: 600; text-transform: uppercase; font-size: 23px; margin: 0 0 8px; }
.service-text { margin: 0; font-size: 15px; line-height: 1.6; color: var(--color-neutral-700); }

/* ── why us (ЛИСТ 02) ─────────────────────────────────────────────────── */
.why-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 0;
  border-top: 1px solid var(--color-divider); border-left: 1px solid var(--color-divider);
}
.why-item {
  padding: 26px 24px; display: grid; grid-template-rows: auto auto 1fr; gap: 10px;
  border-right: 1px solid var(--color-divider); border-bottom: 1px solid var(--color-divider);
}
.why-num { font-family: var(--font-heading); font-size: 44px; line-height: 1; color: var(--color-accent-400); }
.why-title { font-family: var(--font-heading); font-weight: 600; text-transform: uppercase; font-size: 21px; line-height: 1.1; }
.why-text { margin: 0; font-size: 15px; line-height: 1.6; color: var(--color-neutral-700); }

/* ── skyline dividers ─────────────────────────────────────────────────── */
.skyline { padding-block: clamp(36px, 6vw, 60px) 0; }
.skyline svg { display: block; }

/* ── process (ЛИСТ 03) ────────────────────────────────────────────────── */
.process-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 22px; }
.process-step { border-top: 2px solid var(--color-text); padding-top: 18px; }
.process-axis { font-family: var(--font-mono); font-size: 11.5px; letter-spacing: 0.16em; color: var(--color-accent-700); margin: 0 0 12px; }
.process-title { font-family: var(--font-heading); font-weight: 600; text-transform: uppercase; font-size: 20px; margin: 0 0 8px; }
.process-text { margin: 0; font-size: 14.5px; line-height: 1.6; color: var(--color-neutral-700); }

/* ── objects (ЛИСТ 04) — фотогалерея-карусель ─────────────────────────── */
.gallery { display: grid; gap: 20px; }
.gallery-viewport {
  position: relative; overflow: hidden;
  background: var(--color-neutral-800);
}
.gallery-track {
  display: flex;
  transition: transform 0.45s cubic-bezier(0.4, 0.05, 0.2, 1);
}
@media (prefers-reduced-motion: reduce) {
  .gallery-track { transition: none; }
}
.gallery-slide {
  margin: 0; flex: 0 0 100%; position: relative;
  aspect-ratio: 16 / 10;
}
.gallery-photo {
  display: block; width: 100%; height: 100%; object-fit: cover; cursor: zoom-in;
}
.gallery-caption {
  position: absolute; left: 0; bottom: 0; right: 0;
  padding: 30px 20px 16px;
  font-family: var(--font-heading); text-transform: uppercase;
  font-size: clamp(18px, 2.4vw, 24px); letter-spacing: 0.02em; color: #fff;
  background: linear-gradient(to top, rgba(20, 22, 24, 0.82), transparent);
  pointer-events: none;
}

/* prev / next arrows over the viewport */
.gallery-nav {
  position: absolute; top: 50%; transform: translateY(-50%);
  width: 44px; height: 44px; display: grid; place-items: center;
  color: var(--color-text); cursor: pointer;
  background: color-mix(in srgb, var(--color-bg) 88%, transparent);
  border: 1px solid var(--color-divider); backdrop-filter: blur(4px);
  transition: background 0.15s ease;
}
.gallery-nav:hover { background: var(--color-bg); }
.gallery-prev { left: 14px; }
.gallery-next { right: 14px; }

.gallery-counter {
  position: absolute; top: 14px; right: 14px;
  padding: 5px 10px; font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.1em;
  color: var(--color-text); background: color-mix(in srgb, var(--color-bg) 88%, transparent);
  border: 1px solid var(--color-divider);
}

/* dots */
.gallery-dots { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }
.gallery-dot {
  width: 34px; height: 4px; padding: 0; cursor: pointer;
  background: var(--color-neutral-400); border: none;
  transition: background 0.15s ease;
}
.gallery-dot:hover { background: var(--color-neutral-600); }
.gallery-dot[aria-selected="true"] { background: var(--color-accent); }

/* ── lightbox / модальное окно ────────────────────────────────────────── */
.lightbox {
  position: fixed; inset: 0; z-index: 100;
  display: flex; align-items: center; justify-content: center;
  padding: clamp(16px, 4vw, 48px);
  background: rgba(16, 18, 20, 0.92);
}
.lightbox[hidden] { display: none; }
.lightbox-figure { margin: 0; display: grid; gap: 14px; max-width: 100%; max-height: 100%; }
.lightbox-image {
  display: block; max-width: 100%; max-height: 78vh;
  margin-inline: auto; object-fit: contain;
  border: 1px solid rgba(255, 255, 255, 0.15);
}
.lightbox-caption {
  text-align: center; font-family: var(--font-heading); text-transform: uppercase;
  font-size: clamp(16px, 2.2vw, 22px); letter-spacing: 0.02em; color: #fff;
}
.lightbox-close {
  position: absolute; top: 16px; right: 16px;
  width: 46px; height: 46px; display: grid; place-items: center;
  color: #fff; cursor: pointer; background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.28);
  transition: background 0.15s ease;
}
.lightbox-close:hover { background: rgba(255, 255, 255, 0.12); }
.lightbox-nav {
  position: absolute; top: 50%; transform: translateY(-50%);
  width: 52px; height: 52px; display: grid; place-items: center;
  color: #fff; cursor: pointer; background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.28);
  transition: background 0.15s ease;
}
.lightbox-nav:hover { background: rgba(255, 255, 255, 0.12); }
.lightbox-prev { left: clamp(12px, 3vw, 32px); }
.lightbox-next { right: clamp(12px, 3vw, 32px); }
@media (max-width: 600px) {
  .lightbox-nav { width: 42px; height: 42px; }
  .lightbox-prev { left: 8px; }
  .lightbox-next { right: 8px; }
}

/* ── request (ЛИСТ 05) ────────────────────────────────────────────────── */
.request-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 40px; align-items: start; }
.request-intro { display: grid; gap: 22px; }
.request-text { margin: 0; font-size: 16px; line-height: 1.65; color: var(--color-neutral-800); max-width: 46ch; }
.request-contacts { display: grid; gap: 14px; font-family: var(--font-mono); font-size: 14px; }
.request-contacts-row { display: flex; gap: 14px; }
.request-contacts-label { color: var(--color-neutral-600); min-width: 84px; }
.request-form { padding: 30px; display: grid; gap: 18px; }
.request-note { margin: 0; font-size: 12.5px; line-height: 1.6; color: var(--color-neutral-600); }

/* ── footer ───────────────────────────────────────────────────────────── */
.site-footer { margin-top: 88px; border-top: 1px solid var(--color-divider); background: var(--color-neutral-100); }
.footer-grid {
  padding-block: 34px 44px;
  display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 28px; align-items: start;
}
.footer-brand-name { font-family: var(--font-heading); font-size: 22px; letter-spacing: 0.06em; text-transform: uppercase; margin: 0 0 10px; }
.footer-brand-name strong { font-weight: 700; }
.footer-brand-text { margin: 0; font-size: 14px; line-height: 1.6; color: var(--color-neutral-700); max-width: 34ch; }
.footer-nav { display: grid; gap: 9px; font-size: 14px; }
.footer-contacts { display: grid; gap: 9px; font-family: var(--font-mono); font-size: 14px; }
.footer-contacts span { color: var(--color-neutral-700); }
.footer-copyright { margin: 0; font-family: var(--font-mono); font-size: 12px; color: var(--color-neutral-600); }
.footer-legal-links { display: grid; gap: 9px; align-content: start; font-size: 14px; }
.footer-legal {
  border-top: 1px solid var(--color-divider);
  padding-block: 18px 24px;
  display: flex; flex-wrap: wrap; gap: 8px 24px; align-items: baseline; justify-content: space-between;
}
.footer-requisites { margin: 0; font-family: var(--font-mono); font-size: 12px; line-height: 1.7; color: var(--color-neutral-700); }
.footer-legal .footer-copyright { white-space: nowrap; }

/* ── контактная карточка (вместо формы) ───────────────────────────────── */
.contact-card { padding: 30px; display: grid; gap: 14px; align-content: start; }
.contact-card-kicker {
  font-family: var(--font-mono); font-size: 11.5px; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--color-accent-700); margin: 0;
}
.contact-card-title {
  font-family: var(--font-heading); font-weight: 600; text-transform: uppercase;
  font-size: 26px; line-height: 1.08; margin: 0;
}
.contact-card-text { margin: 0; font-size: 15px; line-height: 1.62; color: var(--color-neutral-700); }
.contact-card-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 4px; }
.contact-card-note { margin: 0; font-size: 12.5px; line-height: 1.55; color: var(--color-neutral-600); }

/* — интерактивный «экспресс-чертёж» — */
.config-stage {
  position: relative; padding: 14px 22px 10px;
  background: var(--color-surface); border: 1px solid var(--color-divider);
}
.config-svg { display: block; width: 100%; height: auto; overflow: visible; }
.config-area {
  position: absolute; top: 10px; right: 12px;
  padding: 4px 9px; font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.06em;
  color: var(--color-bg); background: var(--color-accent-700);
}
.config-controls { display: grid; gap: 13px; }
.config-field { display: grid; gap: 7px; }
.config-label {
  font-family: var(--font-mono); font-size: 11.5px; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--color-neutral-600);
}
.config-label b { color: var(--color-accent-700); font-weight: 600; }
.config-select {
  width: 100%; min-height: 36px; padding: 6px 10px;
  font-family: var(--font-body); font-size: 14px; color: var(--color-text);
  background: transparent; border: 1px solid var(--color-divider); border-radius: 0; appearance: none;
}
.config-select:hover { border-color: color-mix(in srgb, var(--color-text) 45%, transparent); }
.config-select:focus-visible { border-color: var(--color-accent); }
.config-range {
  width: 100%; height: 22px; margin: 0; cursor: pointer;
  accent-color: var(--color-accent); background: transparent;
}
.config-label b { color: var(--color-accent-700); font-weight: 600; }

/* переключатель 2D / 3D */
.config-toggle {
  position: absolute; top: 10px; left: 12px; z-index: 2;
  display: flex; border: 1px solid var(--color-divider); background: var(--color-bg);
}
.config-toggle-btn {
  padding: 5px 11px; cursor: pointer; border: none; background: transparent;
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.1em; color: var(--color-text);
}
.config-toggle-btn + .config-toggle-btn { border-left: 1px solid var(--color-divider); }
.config-toggle-btn.is-active { background: var(--color-accent); color: var(--color-bg); }

.config-view { position: relative; }
.config-canvas { display: block; width: 100%; height: 210px; }
.config-caption {
  margin: 0; text-align: center;
  font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.08em; color: var(--color-neutral-600);
}

/* сетка полей конфигуратора */
.config-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 13px; }

/* левый столбец — блок «что даёт экспресс-чертёж» */
.request-hint { border-top: 1px solid var(--color-divider); padding-top: 18px; display: grid; gap: 10px; }
.request-hint-label {
  margin: 0; font-family: var(--font-mono); font-size: 11.5px; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--color-neutral-600);
}
.request-hint-text { margin: 0; font-size: 14.5px; line-height: 1.6; color: var(--color-neutral-700); }

/* ── cookie-баннер ────────────────────────────────────────────────────── */
.cookie-banner {
  position: fixed; z-index: 90;
  left: clamp(12px, 4vw, 28px); right: clamp(12px, 4vw, 28px); bottom: clamp(12px, 4vw, 28px);
  max-width: 720px; margin-inline: auto;
  padding: 18px 22px;
  display: flex; flex-wrap: wrap; gap: 12px 20px; align-items: center; justify-content: space-between;
  background: var(--color-neutral-100);
  box-shadow: 0 8px 28px rgba(20, 22, 24, 0.14);
}
/* атрибут hidden должен перебивать display:flex, иначе баннер не скрыть */
.cookie-banner[hidden] { display: none; }
.cookie-text { margin: 0; flex: 1 1 320px; font-size: 13px; line-height: 1.55; color: var(--color-neutral-800); }
.cookie-text a { color: var(--color-accent-700); text-decoration: underline; text-underline-offset: 2px; }
.cookie-accept { flex: none; padding: 10px 22px; }

/* ── правовые страницы (privacy) ──────────────────────────────────────── */
.legal { padding-block: clamp(32px, 6vw, 60px) 0; max-width: 860px; }
.legal-head { margin-bottom: 32px; }
.legal-title {
  font-family: var(--font-heading); font-weight: 600; text-transform: uppercase;
  font-size: clamp(26px, 3.4vw, 40px); line-height: 1.05; margin: 12px 0 10px; text-wrap: balance;
}
.legal-meta { font-family: var(--font-mono); font-size: 12px; color: var(--color-neutral-600); }
.legal-body { display: grid; gap: 12px; }
.legal-lead { font-size: 16px; line-height: 1.66; color: var(--color-neutral-800); }
.legal-h2 {
  font-family: var(--font-heading); font-weight: 600; text-transform: uppercase;
  font-size: clamp(19px, 2.2vw, 24px); line-height: 1.12; margin: 22px 0 4px;
}
.legal-body p { font-size: 15px; line-height: 1.68; color: var(--color-neutral-800); }
.legal-body strong { color: var(--color-text); }
.legal-body a { color: var(--color-accent-700); text-decoration: underline; text-underline-offset: 2px; }
.legal-list { margin: 4px 0 6px; padding-left: 22px; display: grid; gap: 6px; }
.legal-list li { font-size: 15px; line-height: 1.62; color: var(--color-neutral-800); }
.legal-note {
  margin-top: 18px; padding: 16px 18px;
  background: var(--color-surface); border-left: 3px solid var(--color-accent);
  font-size: 13.5px; line-height: 1.62; color: var(--color-neutral-700);
}
.legal-back { margin: 34px 0 0; font-family: var(--font-mono); font-size: 13px; }