/*
Theme Name: ArtVelSpecStroy Child
Template: generatepress
Version: 1.0
Author: Spirit Digital
Description: Дочерняя тема для artvelspecstroy.ru. Палитра 1:1 с Тильдой (project 8810289).
*/

:root {
  --c-orange:        #ff9e33;
  --c-orange-hover:  #d68429;
  --c-orange-light:  #feaa4e;

  --c-text:          #000000;
  --c-text-2:        #222222;
  --c-text-3:        #303030;
  --c-text-muted:    #808080;

  --c-bg:            #ffffff;
  --c-bg-section:    #f8f8ff;
  --c-bg-card:       #f4f4f4;
  --c-bg-dark:       #1a1a1a;

  --c-warm-beige:    #ece0d2;
  --c-green-sage:    #a9c79a;
  --c-border:        #e2e2e8;

  --font-base:    'Nunito Sans', system-ui, -apple-system, sans-serif;
  --font-display: 'Nunito Sans', system-ui, sans-serif;

  --container:    1240px;
  --gap:          24px;
  --radius:       12px;
  --radius-lg:    20px;

  --shadow-sm:    0 2px 8px rgba(0,0,0,.06);
  --shadow-md:    0 8px 28px rgba(0,0,0,.10);
  --shadow-lg:    0 16px 48px rgba(0,0,0,.14);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-base);
  font-weight: 400;
  color: var(--c-text);
  background: var(--c-bg);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; padding: 0; margin: 0; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gap);
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.18;
  color: var(--c-text);
  margin: 0 0 .6em;
}
h1 { font-size: clamp(32px, 4.4vw, 56px); }
h2 { font-size: clamp(28px, 3.4vw, 44px); }
h3 { font-size: clamp(20px, 2vw, 26px); }
h4 { font-size: 18px; }

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-family: inherit;
  font-weight: 700;
  font-size: 15px;
  cursor: pointer;
  text-align: center;
  transition: background .2s, color .2s, border-color .2s, transform .1s;
  background: transparent;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--c-orange); color: #fff; }
.btn-primary:hover { background: var(--c-orange-hover); }
.btn-secondary { background: var(--c-text); color: #fff; border-color: var(--c-text); }
.btn-secondary:hover { background: transparent; color: var(--c-text); }
.btn-outline-light { background: transparent; color: #fff; border-color: rgba(255,255,255,.6); }
.btn-outline-light:hover { background: #fff; color: var(--c-text); border-color: #fff; }
.btn-lg { padding: 18px 36px; font-size: 16px; }

/* === Section helpers === */
.section { padding: clamp(60px, 8vw, 110px) 0; }
.section--alt { background: var(--c-bg-section); }
.section--warm { background: var(--c-warm-beige); }
.section__head { text-align: center; max-width: 820px; margin: 0 auto 56px; }
.section__head .section__title { margin-bottom: 16px; }
.section__sub { font-size: 18px; color: var(--c-text-2); margin: 0; }
.section__eyebrow {
  text-transform: uppercase;
  letter-spacing: .12em;
  font-size: 13px;
  font-weight: 700;
  color: var(--c-orange);
  margin: 0 0 12px;
}
.section__cta { text-align: center; margin-top: 48px; }

/* === Header === */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: #fff;
  box-shadow: var(--shadow-sm);
  overflow: visible;
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  padding-top: 12px;
  padding-bottom: 12px;
}
.site-header__logo { flex-shrink: 0; }
.site-header__contact { flex-shrink: 0; }
.site-header__logo {
  display: inline-flex;
  align-items: center;
  color: var(--c-text);
  transition: color .2s;
}
.site-header__logo:hover { color: var(--c-orange); }
.site-header__logo-img {
  height: 140px;
  width: auto;
  max-width: 100%;
  display: block;
}

.site-nav__list {
  display: flex;
  gap: 24px;
  flex-wrap: nowrap;
}
.site-nav a {
  font-size: 15px;
  font-weight: 600;
  color: var(--c-text-2);
  padding: 8px 0;
  white-space: nowrap;
  transition: color .2s;
}
.site-nav a:hover { color: var(--c-orange); }

.has-submenu { position: relative; }
.has-submenu > a::after {
  content: '▾';
  font-size: 10px;
  margin-left: 6px;
  opacity: .6;
}
.submenu {
  position: absolute;
  top: 100%;
  left: -16px;
  background: #fff;
  min-width: 260px;
  padding: 12px 0;
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity .18s, transform .18s, visibility .18s;
}
.has-submenu:hover .submenu { opacity: 1; visibility: visible; transform: translateY(0); }
.submenu li a { display: block; padding: 10px 20px; white-space: nowrap; }

.site-header__contact { text-align: right; line-height: 1.3; }
.site-header__phone {
  display: block;
  font-weight: 800;
  font-size: 18px;
  color: var(--c-text);
}
.site-header__hours { font-size: 12px; color: var(--c-text-muted); }

.site-header__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 32px; height: 32px;
  padding: 6px;
  background: none;
  border: 0;
  cursor: pointer;
}
.site-header__burger span {
  display: block;
  width: 100%; height: 2px;
  background: var(--c-text);
  border-radius: 2px;
}

/* === Breadcrumbs === */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  margin-bottom: 28px;
  color: rgba(255,255,255,.75);
}
.breadcrumbs a {
  color: rgba(255,255,255,.85);
  transition: color .2s;
}
.breadcrumbs a:hover { color: var(--c-orange-light); }
.breadcrumbs span { opacity: .55; }

/* === Hero === */
.hero {
  position: relative;
  min-height: 720px;
  display: flex;
  align-items: center;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  color: #fff;
  padding: 80px 0;
}
.hero--service { min-height: 520px; padding: 64px 0; }
.hero--service .hero__title { font-size: clamp(28px, 3.6vw, 48px); }
.hero__inner { width: 100%; }
.hero__content { max-width: 820px; }
.hero__eyebrow {
  text-transform: uppercase;
  letter-spacing: .14em;
  font-size: 13px;
  font-weight: 700;
  color: var(--c-orange-light);
  margin: 0 0 24px;
}
.hero__title { color: #fff; }
.hero__title span {
  display: block;
  font-weight: 400;
  font-size: .55em;
  opacity: .9;
  margin-top: 12px;
}
.hero__lead { font-size: 19px; line-height: 1.55; max-width: 640px; opacity: .92; margin: 0 0 36px; }
.hero__cta { display: flex; flex-wrap: wrap; gap: 16px; margin-bottom: 56px; }
.hero__features {
  display: flex;
  flex-wrap: wrap;
  gap: 48px;
  padding-top: 36px;
  border-top: 1px solid rgba(255,255,255,.18);
  max-width: 720px;
}
.hero__features li { font-size: 14px; opacity: .9; }
.hero__features strong {
  display: block;
  font-size: 36px;
  font-weight: 800;
  color: var(--c-orange-light);
  margin-bottom: 4px;
}

/* === Services === */
.services-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.services-grid--4 { grid-template-columns: repeat(4, 1fr); }
.section--related .services-grid { grid-template-columns: repeat(3, 1fr); }
.service-card--inline .service-card__img { aspect-ratio: 16 / 10; }
.service-card {
  display: block;
  background: #fff;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform .25s, box-shadow .25s;
}
.service-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.service-card__img {
  aspect-ratio: 4 / 3;
  background-size: cover;
  background-position: center;
}
.service-card__body { padding: 24px 24px 28px; }
.service-card h3 { font-size: 20px; margin-bottom: 10px; }
.service-card p { color: var(--c-text-2); font-size: 15px; margin: 0 0 16px; }
.service-card__more { color: var(--c-orange); font-weight: 700; font-size: 14px; }

/* === Projects === */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.project-card {
  position: relative;
  display: block;
  aspect-ratio: 4 / 3;
  border-radius: var(--radius-lg);
  background-size: cover;
  background-position: center;
  overflow: hidden;
  color: #fff;
  isolation: isolate;
}
.project-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,.75) 0%, rgba(0,0,0,0) 55%);
  z-index: 1;
  transition: background .25s;
}
.project-card:hover::before { background: linear-gradient(to top, rgba(0,0,0,.85) 0%, rgba(0,0,0,.1) 80%); }
.project-card__title {
  position: absolute;
  left: 22px; right: 22px; bottom: 20px;
  font-weight: 700;
  font-size: 18px;
  z-index: 2;
}

/* === Equipment === */
.equipment-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
}
.equipment-card {
  display: block;
  background: var(--c-bg-card);
  padding: 32px 24px;
  border-radius: var(--radius-lg);
  text-align: center;
  transition: background .25s, transform .2s;
}
.equipment-card:hover { background: var(--c-warm-beige); transform: translateY(-4px); }
.equipment-card__icon { font-size: 36px; margin-bottom: 16px; }
.equipment-card h3 { font-size: 17px; margin-bottom: 6px; }
.equipment-card p { font-size: 13px; color: var(--c-text-muted); margin: 0; }

/* === CTA Banner === */
.cta-banner {
  background-size: cover;
  background-position: center;
  color: #fff;
}
.cta-banner__inner {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 56px;
  align-items: center;
}
.cta-banner h2 { color: #fff; margin-bottom: 18px; }
.cta-banner p { font-size: 17px; opacity: .92; margin: 0; }

.cta-form {
  background: #fff;
  padding: 32px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  display: grid;
  gap: 12px;
}
.cta-form input,
.cta-form textarea {
  padding: 16px 18px;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 15px;
  background: #fff;
  color: var(--c-text);
  resize: vertical;
}
.cta-form input:focus {
  outline: 2px solid var(--c-orange);
  outline-offset: -1px;
  border-color: var(--c-orange);
}
.cta-form small {
  font-size: 12px;
  color: var(--c-text-muted);
  line-height: 1.4;
  margin-top: 4px;
}
.cta-form small a { color: var(--c-text); text-decoration: underline; }
.cta-form--inline {
  grid-template-columns: 1fr 1fr auto;
  align-items: end;
  box-shadow: none;
  background: #fff;
}

/* === About === */
.about-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 64px;
  align-items: center;
}
.about-grid__text p { font-size: 16px; color: var(--c-text-2); margin: 0 0 16px; }
.about-grid__text .btn { margin-top: 20px; }
.about-grid--reverse { grid-template-columns: 1fr 1.1fr; }
.about-grid--reverse .about-grid__media { order: -1; }
.about-grid__media img { border-radius: var(--radius-lg); width: 100%; height: 100%; object-fit: cover; max-height: 520px; }

.checklist {
  list-style: none;
  padding: 0;
  margin: 24px 0 0;
  display: grid;
  gap: 10px;
}
.checklist li {
  position: relative;
  padding-left: 30px;
  font-size: 15px;
  color: var(--c-text-2);
}
.checklist li::before {
  content: '✓';
  position: absolute;
  left: 0; top: 0;
  width: 22px; height: 22px;
  border-radius: 50%;
  background: var(--c-orange);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  display: flex; align-items: center; justify-content: center;
}
.about-grid__stats { display: grid; gap: 18px; }
.stat-card {
  background: var(--c-bg-section);
  padding: 28px 32px;
  border-radius: var(--radius-lg);
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 24px;
  align-items: center;
  border-left: 4px solid var(--c-orange);
}
.stat-card strong {
  font-size: 48px;
  font-weight: 800;
  line-height: 1;
  color: var(--c-orange);
}
.stat-card span { font-size: 15px; color: var(--c-text-2); }

/* === Advantages === */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.advantage-card {
  background: #fff;
  padding: 36px 28px;
  border-radius: var(--radius-lg);
}
.advantage-card__num {
  font-size: 14px;
  font-weight: 800;
  letter-spacing: .12em;
  color: var(--c-orange);
  margin-bottom: 20px;
}
.advantage-card h3 { font-size: 19px; margin-bottom: 12px; }
.advantage-card p { font-size: 14px; color: var(--c-text-2); margin: 0; line-height: 1.55; }

/* === Contact cards === */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.contact-card {
  background: #fff;
  padding: 32px 24px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  text-align: center;
  border-top: 4px solid var(--c-orange);
  transition: transform .2s, box-shadow .2s;
}
.contact-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.contact-card__icon { font-size: 36px; margin-bottom: 12px; }
.contact-card h3 { font-size: 15px; text-transform: uppercase; letter-spacing: .08em; color: var(--c-text-muted); margin-bottom: 14px; }
.contact-card__primary { display: block; font-size: 19px; font-weight: 700; color: var(--c-text); margin-bottom: 6px; }
a.contact-card__primary:hover { color: var(--c-orange); }
.contact-card p { font-size: 14px; color: var(--c-text-muted); margin: 0; }

/* === Map === */
.map-wrap {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}
.map-wrap iframe { display: block; border: 0; }

/* === Requisites === */
.requisites-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px 48px;
  max-width: 1000px;
  margin: 0 auto;
}
.requisite {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--c-border);
}
.requisite span {
  font-size: 13px;
  color: var(--c-text-muted);
  text-transform: uppercase;
  letter-spacing: .04em;
  line-height: 1.4;
}
.requisite strong { font-size: 15px; color: var(--c-text); font-weight: 600; }

/* === Filter tabs === */
.filter-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
}
.filter-tabs li a {
  display: inline-block;
  padding: 10px 22px;
  background: var(--c-bg-section);
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  color: var(--c-text-2);
  transition: background .2s, color .2s;
}
.filter-tabs li a:hover { background: var(--c-warm-beige); color: var(--c-text); }
.filter-tabs li.is-active a { background: var(--c-orange); color: #fff; }

/* === Section head left-aligned === */
.section__head--left { text-align: left; max-width: none; }

/* === About-us stats === */
.section--stats { padding: 60px 0; background: var(--c-bg-section); }
.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.stat-card--big {
  background: #fff;
  padding: 36px 32px;
  border-radius: var(--radius-lg);
  display: block;
  text-align: left;
  border-left: 4px solid var(--c-orange);
  box-shadow: var(--shadow-sm);
}
.stat-card--big strong { display: block; font-size: 56px; font-weight: 800; line-height: 1; color: var(--c-orange); margin-bottom: 10px; }
.stat-card--big span { font-size: 15px; color: var(--c-text-2); line-height: 1.5; }

/* === Hero compact === */
.hero--compact { min-height: 380px; padding: 56px 0; }

/* === Product page === */
.intro-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 56px;
  align-items: center;
}
.intro-grid__text h2 { margin-bottom: 20px; }
.intro-grid__text p { font-size: 16px; color: var(--c-text-2); margin: 0 0 16px; }
.intro-grid__media img { width: 100%; border-radius: var(--radius-lg); object-fit: cover; max-height: 480px; }

.brand-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  list-style: none;
  padding: 0;
  margin: 0 0 28px;
}
.brand-list li {
  padding: 8px 16px;
  background: var(--c-warm-beige);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--c-text);
}

.catalog-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.catalog-card {
  background: #fff;
  aspect-ratio: 1 / 1;
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  transition: transform .2s, box-shadow .2s;
}
.catalog-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.catalog-card img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

.description-block {
  max-width: 820px;
  margin: 0 auto;
}
.description-block h2 { margin-bottom: 20px; }
.description-block p { font-size: 16px; line-height: 1.7; color: var(--c-text-2); margin: 0 0 16px; }

/* === Quiz === */
.section--quiz { background: var(--c-bg-section); }
.quiz {
  max-width: 920px;
  margin: 0 auto;
  background: #fff;
  padding: 48px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}
.quiz__head { text-align: center; margin-bottom: 36px; }
.quiz__head .section__title { font-size: 28px; margin-bottom: 12px; }
.quiz__step { margin-bottom: 28px; }
.quiz__q { font-weight: 700; font-size: 16px; margin: 0 0 14px; color: var(--c-text); }
.quiz__options {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}
.quiz__options label {
  display: block;
  cursor: pointer;
}
.quiz__options input { position: absolute; opacity: 0; pointer-events: none; }
.quiz__options span {
  display: block;
  padding: 14px 12px;
  text-align: center;
  background: var(--c-bg-section);
  border: 2px solid transparent;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  transition: background .2s, border-color .2s, color .2s;
}
.quiz__options label:hover span { background: var(--c-warm-beige); }
.quiz__options input:checked + span {
  background: #fff;
  border-color: var(--c-orange);
  color: var(--c-orange);
}
.quiz__contact {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  margin-top: 28px;
  padding-top: 28px;
  border-top: 1px solid var(--c-border);
}
.quiz__contact input {
  padding: 16px 20px;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 15px;
}
.quiz__contact input:focus { outline: 2px solid var(--c-orange); border-color: var(--c-orange); }

/* === Workflow === */
.workflow-grid {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
  counter-reset: workflow;
}
.workflow-step {
  position: relative;
  background: #fff;
  padding: 32px 24px 28px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border-top: 4px solid var(--c-orange);
}
.workflow-step__num {
  font-size: 32px;
  font-weight: 800;
  color: var(--c-orange);
  line-height: 1;
  margin-bottom: 14px;
}
.workflow-step h3 { font-size: 17px; margin-bottom: 10px; }
.workflow-step p { font-size: 14px; line-height: 1.5; color: var(--c-text-2); margin: 0; }

/* === Partners === */
.section--partners { background: var(--c-bg-section); }
.partners-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
}
.partner-logo {
  background: #fff;
  border-radius: var(--radius);
  height: 110px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px 20px;
  box-shadow: var(--shadow-sm);
  transition: transform .2s, box-shadow .2s;
}
.partner-logo:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.partner-logo img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  filter: grayscale(20%);
  transition: filter .2s;
}
.partner-logo:hover img { filter: none; }

/* === Final CTA === */
.final-cta {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 48px;
  align-items: center;
}
.final-cta h2 { margin-bottom: 10px; }
.final-cta p { font-size: 17px; color: var(--c-text-2); margin: 0; }

/* === Footer === */
.site-footer {
  background: var(--c-bg-dark);
  color: rgba(255,255,255,.7);
  padding-top: 64px;
}
.site-footer__inner {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr 1.1fr;
  gap: 48px;
  padding-bottom: 56px;
}
.site-footer__brand { color: rgba(255,255,255,.7); }
.site-footer__logo {
  display: block;
  height: 96px;
  width: auto;
  max-width: 100%;
  background: #fff;
  padding: 12px 20px;
  border-radius: var(--radius);
  margin-bottom: 20px;
}
.site-footer__brand p { font-size: 14px; line-height: 1.6; margin: 0; max-width: 320px; }
.site-footer__col h4 {
  color: #fff;
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: .1em;
  margin-bottom: 18px;
}
.site-footer__col li { margin-bottom: 10px; }
.site-footer__col a { font-size: 14px; transition: color .2s; }
.site-footer__col a:hover { color: var(--c-orange); }
.site-footer__phone {
  display: block;
  color: #fff;
  font-weight: 800;
  font-size: 20px;
  margin-bottom: 6px;
}
.site-footer__hours { font-size: 13px; margin: 0 0 18px; }
.site-footer__email { display: block; font-size: 14px; margin-bottom: 14px; }
.site-footer__email:hover { color: var(--c-orange); }
.site-footer__addr { font-size: 14px; margin: 0; }

.site-footer__bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  padding: 22px 0;
}
.site-footer__bottom .container {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  font-size: 13px;
}

/* === Responsive === */
@media (max-width: 1300px) {
  .site-header__inner { min-height: 110px; }
  .site-header__logo-img { height: 96px; }
  .site-nav, .site-header__contact, .site-header__social { display: none; }
  .site-header__burger { display: flex; }
  body.nav-open .site-nav {
    display: block;
    position: fixed;
    inset: 110px 0 0;
    background: #fff;
    padding: 32px;
    overflow-y: auto;
    z-index: 99;
  }
  body.nav-open .site-nav__list { flex-direction: column; gap: 18px; font-size: 18px; align-items: flex-start; }
  body.nav-open .submenu {
    position: static;
    opacity: 1; visibility: visible;
    transform: none;
    box-shadow: none;
    padding-left: 18px;
  }
}

@media (max-width: 1100px) {
  .services-grid, .advantages-grid { grid-template-columns: repeat(2, 1fr); }
  .equipment-grid { grid-template-columns: repeat(3, 1fr); }
  .projects-grid { grid-template-columns: repeat(2, 1fr); }
  .cta-banner__inner, .about-grid, .final-cta { grid-template-columns: 1fr; gap: 40px; }
  .cta-form--inline { grid-template-columns: 1fr; }
  .site-footer__inner { grid-template-columns: 1fr 1fr; }
  .partners-grid { grid-template-columns: repeat(4, 1fr); }
  .workflow-grid { grid-template-columns: repeat(2, 1fr); }
  .services-grid--4 { grid-template-columns: repeat(2, 1fr); }
  .about-grid--reverse { grid-template-columns: 1fr; }
  .about-grid--reverse .about-grid__media { order: 0; }
  .section--related .services-grid { grid-template-columns: 1fr; }
  .intro-grid { grid-template-columns: 1fr; gap: 32px; }
  .catalog-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: 1fr; }
  .requisites-grid { grid-template-columns: 1fr; gap: 12px; }
  .requisite { grid-template-columns: 1fr; gap: 4px; }
  .quiz { padding: 32px; }
}

@media (max-width: 720px) {
  .site-header__inner { grid-template-columns: auto 1fr auto; min-height: 64px; }
  .site-nav, .site-header__contact, .site-header__social { display: none; }
  .site-header__burger { display: flex; }
  body.nav-open .site-nav {
    display: block;
    position: fixed;
    inset: 88px 0 0;
    background: #fff;
    padding: 32px;
    overflow-y: auto;
    z-index: 99;
  }
  body.nav-open .site-nav__list { flex-direction: column; gap: 18px; font-size: 18px; }
  body.nav-open .submenu {
    position: static;
    opacity: 1; visibility: visible;
    transform: none;
    box-shadow: none;
    padding-left: 18px;
  }

  .hero { min-height: auto; padding: 60px 0; }
  .hero__features { gap: 28px; }
  .hero__features li { font-size: 13px; }
  .hero__features strong { font-size: 28px; }

  .services-grid, .advantages-grid, .projects-grid { grid-template-columns: 1fr; }
  .equipment-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-card { grid-template-columns: 1fr; gap: 8px; text-align: left; }
  .site-footer__inner { grid-template-columns: 1fr; gap: 32px; }
  .partners-grid { grid-template-columns: repeat(3, 1fr); }
  .partner-logo { height: 90px; }
  .workflow-grid { grid-template-columns: 1fr; }
  .services-grid--4 { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .catalog-grid { grid-template-columns: repeat(2, 1fr); }
  .quiz__options { grid-template-columns: repeat(2, 1fr); }
  .quiz__contact { grid-template-columns: 1fr; }

  .site-header__inner { gap: 16px; padding: 8px 0; min-height: 88px; }
  .site-header__logo-img { height: 64px; }

  .hero--service { min-height: auto; padding: 48px 0; }
  .hero__lead { font-size: 16px; }
  .breadcrumbs { font-size: 12px; margin-bottom: 18px; }

  .section { padding: 56px 0; }
  .section__head { margin-bottom: 36px; }

  .filter-tabs { justify-content: flex-start; }
  .filter-tabs li a { padding: 8px 16px; font-size: 13px; }

  .cta-banner__inner { padding: 0; }
  .cta-form { padding: 24px; }
  .quiz { padding: 24px; }
  .quiz__head .section__title { font-size: 22px; }
}

@media (max-width: 480px) {
  :root { --gap: 16px; }
  body { font-size: 15px; }

  .site-header__logo-img { height: 52px; }
  .site-header__burger { width: 36px; height: 36px; }

  .hero { padding: 48px 0 56px; }
  .hero__title span { font-size: .65em; }
  .hero__lead { font-size: 15px; }
  .hero__cta { flex-direction: column; align-items: stretch; }
  .hero__cta .btn { width: 100%; }
  .hero__features { gap: 20px; padding-top: 24px; }
  .hero__features li { font-size: 12px; }
  .hero__features strong { font-size: 24px; }

  h1 { font-size: 28px; }
  h2 { font-size: 24px; }

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

  .stat-card--big { padding: 24px; }
  .stat-card--big strong { font-size: 40px; }

  .filter-tabs { gap: 6px; }
  .filter-tabs li a { padding: 7px 12px; font-size: 12px; }

  .cta-form { padding: 20px; }
  .quiz { padding: 20px; }
  .quiz__options { grid-template-columns: 1fr; }

  .section { padding: 48px 0; }
  .section__head { margin-bottom: 28px; }

  .contact-card { padding: 24px 18px; }
}

/* === Header messenger buttons === */
.site-header__social { display: flex; gap: 10px; flex-shrink: 0; }
.header-social-btn {
  width: 42px; height: 42px;
  border-radius: 50%;
  background: var(--c-orange);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  transition: background .2s;
}
.header-social-btn:hover { background: var(--c-orange-hover); }
.header-social-btn svg { width: 22px; height: 22px; }