:root {
  --color-red: #e31f26;
  --color-red-dark: #b9151b;
  --color-black: #08090b;
  --color-ink: #20242a;
  --color-muted: #66707c;
  --color-line: #dde1e7;
  --color-soft: #f5f6f8;
  --color-white: #ffffff;
  --color-accent: #176b64;
  --shadow-soft: 0 18px 45px rgba(8, 9, 11, 0.12);
  --container: 1280px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--color-ink);
  background: var(--color-white);
  line-height: 1.55;
  overflow-x: hidden;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

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

.container {
  width: min(100% - 40px, var(--container));
  margin: 0 auto;
}

.section {
  padding: 88px 0;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 36px;
}

.section-heading h2,
.about-copy h2,
.contacts h2 {
  margin: 0;
  color: var(--color-black);
  font-size: 52px;
  line-height: 1.08;
  letter-spacing: 0;
}

.section-heading p,
.about-copy p {
  color: var(--color-muted);
  font-size: 17px;
}

.section-kicker {
  margin: 0 0 12px;
  color: var(--color-red);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 12px 20px;
  border: 1px solid transparent;
  border-radius: 6px;
  font-weight: 800;
  line-height: 1;
  cursor: pointer;
  transition: transform 180ms ease, background 180ms ease, color 180ms ease, border-color 180ms ease;
}

.btn:hover,
.btn:focus-visible {
  transform: translateY(-2px);
}

.btn-primary {
  background: var(--color-red);
  color: var(--color-white);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: var(--color-red-dark);
}

.btn-light {
  border-color: rgba(255, 255, 255, 0.55);
  color: var(--color-white);
  background: rgba(255, 255, 255, 0.08);
}

.btn-dark {
  color: var(--color-white);
  background: var(--color-black);
}

.text-link {
  color: var(--color-red);
  font-weight: 800;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid rgba(221, 225, 231, 0.86);
  backdrop-filter: blur(18px);
}

.header-inner {
  min-height: 76px;
  display: flex;
  align-items: center;
  gap: 26px;
}

.logo-link {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
}

.logo {
  width: 166px;
  height: auto;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 22px;
  margin-left: auto;
  font-size: 14px;
  font-weight: 700;
}

.main-nav a {
  position: relative;
  padding: 8px 0;
}

.main-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 2px;
  height: 2px;
  background: var(--color-red);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 180ms ease;
}

.main-nav a:hover::after,
.main-nav a:focus-visible::after {
  transform: scaleX(1);
}

.header-cta {
  flex: 0 0 auto;
}

.lang-switcher {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px;
  border: 1px solid var(--color-line);
  border-radius: 8px;
  background: var(--color-white);
}

.lang-switcher button {
  min-width: 38px;
  height: 32px;
  border: 0;
  border-radius: 6px;
  color: var(--color-muted);
  background: transparent;
  font-size: 12px;
  font-weight: 900;
  cursor: pointer;
  transition: background 180ms ease, color 180ms ease;
}

.lang-switcher button:hover,
.lang-switcher button:focus-visible,
.lang-switcher button.is-active {
  color: var(--color-white);
  background: var(--color-red);
}

.nav-lang {
  display: none;
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--color-line);
  border-radius: 6px;
  background: var(--color-white);
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  margin: 4px auto;
  background: var(--color-black);
  transition: transform 180ms ease, opacity 180ms ease;
}

/* Hero */
.hero {
  position: relative;
  min-height: calc(100vh - 76px);
  overflow: hidden;
  background: var(--color-black);
}

.hero-track,
.hero-slide {
  min-height: calc(100vh - 76px);
}

.hero-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  visibility: hidden;
  transition: opacity 500ms ease, visibility 500ms ease;
}

.hero-slide.is-active {
  opacity: 1;
  visibility: visible;
}

.hero-slide img {
  width: 100%;
  height: 100%;
  min-height: calc(100vh - 76px);
  object-fit: cover;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(0, 0, 0, 0.78), rgba(0, 0, 0, 0.46) 52%, rgba(0, 0, 0, 0.2));
}

.hero-content {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  max-width: 760px;
  color: var(--color-white);
  padding-top: 36px;
}

.hero-content h1,
.hero-content h2 {
  margin: 0;
  color: var(--color-white);
  font-size: 78px;
  line-height: 0.98;
  letter-spacing: 0;
}

.hero-content p:not(.section-kicker) {
  max-width: 650px;
  margin: 22px 0 0;
  color: rgba(255, 255, 255, 0.84);
  font-size: 21px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.hero-control {
  position: absolute;
  top: 50%;
  z-index: 3;
  width: 44px;
  height: 54px;
  border: 1px solid rgba(255, 255, 255, 0.42);
  border-radius: 6px;
  color: var(--color-white);
  background: rgba(0, 0, 0, 0.28);
  cursor: pointer;
  transform: translateY(-50%);
}

.hero-control:hover,
.hero-control:focus-visible {
  background: var(--color-red);
}

.hero-prev {
  left: 20px;
}

.hero-next {
  right: 20px;
}

.hero-dots {
  position: absolute;
  z-index: 3;
  left: 50%;
  bottom: 30px;
  display: flex;
  gap: 9px;
  transform: translateX(-50%);
}

.hero-dots button {
  width: 34px;
  height: 4px;
  border: 0;
  border-radius: 2px;
  background: rgba(255, 255, 255, 0.42);
  cursor: pointer;
}

.hero-dots button.is-active {
  background: var(--color-red);
}

/* Services */
.services {
  background: var(--color-soft);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

.service-card {
  overflow: hidden;
  min-width: 0;
  border: 1px solid var(--color-line);
  border-radius: 8px;
  background: var(--color-white);
  box-shadow: 0 1px 0 rgba(8, 9, 11, 0.03);
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.service-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-soft);
}

.service-card img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.service-body {
  padding: 20px;
}

.service-body h3 {
  margin: 0 0 8px;
  color: var(--color-black);
  font-size: 20px;
  line-height: 1.2;
}

.service-body p {
  min-height: 78px;
  margin: 0 0 18px;
  color: var(--color-muted);
  font-size: 15px;
}

/* Portfolio */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 24px;
}

.filter-btn {
  min-height: 40px;
  padding: 9px 15px;
  border: 1px solid var(--color-line);
  border-radius: 6px;
  color: var(--color-ink);
  background: var(--color-white);
  cursor: pointer;
  transition: background 180ms ease, color 180ms ease, border-color 180ms ease;
}

.filter-btn.is-active,
.filter-btn:hover,
.filter-btn:focus-visible {
  color: var(--color-white);
  border-color: var(--color-red);
  background: var(--color-red);
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.portfolio-item {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  border: 0;
  border-radius: 8px;
  padding: 0;
  background: var(--color-black);
  cursor: pointer;
}

.portfolio-item[hidden] {
  display: none;
}

.portfolio-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 320ms ease, opacity 320ms ease;
}

.portfolio-item span {
  position: absolute;
  inset: auto 0 0;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
  padding: 22px;
  color: var(--color-white);
  background: linear-gradient(180deg, transparent, rgba(0, 0, 0, 0.8));
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 220ms ease, transform 220ms ease;
}

.portfolio-item strong {
  font-size: 20px;
}

.portfolio-item em {
  color: rgba(255, 255, 255, 0.76);
  font-style: normal;
}

.portfolio-item:hover img,
.portfolio-item:focus-visible img {
  transform: scale(1.05);
  opacity: 0.78;
}

.portfolio-item:hover span,
.portfolio-item:focus-visible span {
  opacity: 1;
  transform: translateY(0);
}

/* About */
.about {
  background: var(--color-black);
  color: var(--color-white);
}

.about-grid,
.contacts-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.88fr);
  gap: 48px;
  align-items: center;
}

.about-copy h2,
.about-copy p {
  color: var(--color-white);
}

.about-copy p {
  color: rgba(255, 255, 255, 0.75);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 28px;
}

.stats-grid div {
  min-height: 96px;
  padding: 18px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.06);
}

.stats-grid strong {
  display: block;
  color: var(--color-white);
  font-size: 34px;
  line-height: 1;
}

.stats-grid span {
  display: block;
  margin-top: 8px;
  color: rgba(255, 255, 255, 0.68);
}

.about-media {
  margin: 0;
  overflow: hidden;
  border-radius: 8px;
}

.about-media img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
}

/* Advantages */
.advantages {
  background: var(--color-white);
}

.advantages-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.advantage-item {
  min-height: 220px;
  padding: 26px;
  border: 1px solid var(--color-line);
  border-radius: 8px;
  background: var(--color-white);
}

.advantage-item svg {
  width: 40px;
  height: 40px;
  margin-bottom: 18px;
  fill: none;
  stroke: var(--color-red);
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.advantage-item h3 {
  margin: 0 0 10px;
  color: var(--color-black);
  font-size: 20px;
}

.advantage-item p {
  margin: 0;
  color: var(--color-muted);
}

/* Contacts */
.contacts {
  background: var(--color-black);
  color: var(--color-white);
}

.contacts h2 {
  color: var(--color-white);
}

.contact-list {
  display: grid;
  gap: 12px;
  margin-top: 24px;
}

.contact-list a,
.contact-list div {
  display: grid;
  gap: 4px;
  padding: 16px;
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.05);
}

.contact-list strong {
  color: rgba(255, 255, 255, 0.62);
  font-size: 12px;
  text-transform: uppercase;
}

.contact-list span {
  color: var(--color-white);
  font-weight: 700;
}

.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.map-panel {
  position: relative;
  display: flex;
  min-height: 430px;
  flex-direction: column;
  justify-content: flex-end;
  gap: 12px;
  overflow: hidden;
  border-radius: 8px;
  padding: 32px;
  background:
    linear-gradient(135deg, rgba(227, 31, 38, 0.92), rgba(8, 9, 11, 0.62)),
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.16) 0 1px, transparent 1px 48px),
    repeating-linear-gradient(0deg, rgba(255, 255, 255, 0.12) 0 1px, transparent 1px 48px),
    #20242a;
}

.map-panel span {
  color: rgba(255, 255, 255, 0.72);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
}

.map-panel strong {
  max-width: 360px;
  color: var(--color-white);
  font-size: 36px;
  line-height: 1.05;
}

.map-panel em {
  color: var(--color-white);
  font-style: normal;
  font-weight: 800;
}

/* Footer */
.site-footer {
  padding: 52px 0 24px;
  color: var(--color-white);
  background: #050608;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: 34px;
}

.footer-logo {
  width: 150px;
  filter: brightness(0) invert(1);
}

.footer-brand p {
  max-width: 360px;
  color: rgba(255, 255, 255, 0.62);
}

.site-footer h3 {
  margin: 0 0 14px;
  font-size: 15px;
}

.site-footer a {
  display: block;
  margin: 8px 0;
  color: rgba(255, 255, 255, 0.72);
}

.site-footer a:hover,
.site-footer a:focus-visible {
  color: var(--color-white);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 34px;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  color: rgba(255, 255, 255, 0.55);
  font-size: 14px;
}

/* Lightbox and fixed chat */
.floating-chat {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 90;
  display: grid;
  width: 58px;
  height: 58px;
  place-items: center;
  border-radius: 8px;
  color: var(--color-white);
  background: var(--color-red);
  box-shadow: var(--shadow-soft);
  font-weight: 900;
}

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 26px;
  background: rgba(0, 0, 0, 0.86);
}

.lightbox.is-open {
  display: flex;
}

.lightbox figure {
  width: min(980px, 86vw);
  margin: 0;
}

.lightbox img {
  width: 100%;
  max-height: 78vh;
  border-radius: 8px;
  object-fit: contain;
  background: var(--color-black);
}

.lightbox figcaption {
  margin-top: 12px;
  color: var(--color-white);
  text-align: center;
  font-weight: 800;
}

.lightbox-close,
.lightbox-nav {
  position: absolute;
  border: 1px solid rgba(255, 255, 255, 0.32);
  border-radius: 6px;
  color: var(--color-white);
  background: rgba(255, 255, 255, 0.1);
  cursor: pointer;
}

.lightbox-close {
  top: 22px;
  right: 22px;
  width: 44px;
  height: 44px;
}

.lightbox-nav {
  top: 50%;
  width: 46px;
  height: 58px;
  transform: translateY(-50%);
}

.lightbox-prev {
  left: 22px;
}

.lightbox-next {
  right: 22px;
}

.lightbox-close:hover,
.lightbox-nav:hover,
.lightbox-close:focus-visible,
.lightbox-nav:focus-visible {
  background: var(--color-red);
}