/* ============================================
   GUDING TRADING — Corporate Design System
   Visual parity with imigroup.com
   ============================================ */

/* --- CSS Custom Properties (Design Tokens) --- */
:root {
  /* Primary Colors — IMI-style red corporate palette */
  --color-primary: #28243F;
  --color-primary-dark: #111111;
  --color-primary-light: #2a2a2a;
  --color-accent: #c62828;
  --color-accent-light: #e53935;
  --color-accent-dark: #a31b1b;

  /* Neutrals */
  --color-white: #ffffff;
  --color-off-white: #f8f9fa;
  --color-light-gray: #eef1f5;
  --color-mid-gray: #8a94a6;
  --color-dark-gray: #4a5568;
  --color-text: #1a2332;
  --color-text-light: #6b7b8d;
  --color-border: #e2e8f0;

  /* Corporate accent — warm tones to complement red */
  --color-teal: #b71c1c;
  --color-gold: #c8a45e;

  /* Typography Scale — IMI uses clean sans-serif */
  --font-primary: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-heading: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* Font Sizes */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.25rem;
  --text-xl: 1.5rem;
  --text-2xl: 2.25rem;
  --text-3xl: 3rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  --text-6xl: 3.75rem;
  --text-hero: 3.5rem;

  /* Font Weights */
  --weight-light: 300;
  --weight-regular: 400;
  --weight-medium: 500;
  --weight-semibold: 600;
  --weight-bold: 700;

  /* Line Heights */
  --leading-tight: 1.15;
  --leading-snug: 1.3;
  --leading-normal: 1.6;
  --leading-relaxed: 1.75;

  /* Spacing Scale (8px base) */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Section spacing — generous like IMI */
  --section-padding: 120px;
  --section-padding-sm: clamp(3rem, 5vw, 5rem);

  /* Grid */
  --container-max: 1240px;
  --container-narrow: 960px;
  --container-wide: 1440px;
  --grid-gap: 2rem;

  /* Transitions — subtle, professional */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slower: 0.8s cubic-bezier(0.4, 0, 0.2, 1);

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
  --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.15);

  /* Border Radius */
  --radius-sm: 2px;
  --radius-md: 4px;
  --radius-lg: 8px;

  /* Header */
  --header-height: 100px;
}

/* --- Reset & Base --- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-primary);
  font-size: var(--text-base);
  font-weight: var(--weight-regular);
  line-height: var(--leading-normal);
  color: var(--color-text);
  background: var(--color-white);
  overflow-x: hidden;
}

/* Language-specific typography */
body[data-lang="cn"] {
  font-family: 'Roboto', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
  line-height: 1.8;
  letter-spacing: 0.02em;
}

body[data-lang="ru"] {
  font-family: 'Roboto', 'Noto Sans', sans-serif;
  line-height: 1.55;
  letter-spacing: 0.005em;
}

body[data-lang="en"] {
  font-family: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  line-height: 1.55;
}

/* ============================================
   EN / RU Typography Scaling
   Latin/Cyrillic uppercase text is visually
   much larger than CJK at the same px value.
   Scale down titles, descriptions, buttons.
   ============================================ */

/* --- Hero Title: EN/RU --- */
body[data-lang="en"] .hero__title,
body[data-lang="ru"] .hero__title {
  font-size: 40px;
  letter-spacing: 1.5px;
  font-weight: 700;
  line-height: 1.15;
  max-width: 720px;
}

body[data-lang="en"] .hero__description,
body[data-lang="ru"] .hero__description {
  font-size: 17px;
  line-height: 1.65;
  max-width: 540px;
}

body[data-lang="en"] .hero__label,
body[data-lang="ru"] .hero__label {
  font-size: 12px;
  letter-spacing: 0.18em;
}

/* --- Section Titles: EN/RU --- */
body[data-lang="en"] .section-title,
body[data-lang="ru"] .section-title {
  font-size: 34px;
  letter-spacing: 0.5px;
  line-height: 1.2;
}

body[data-lang="en"] .section-subtitle,
body[data-lang="ru"] .section-subtitle {
  font-size: 1.05rem;
  line-height: 1.6;
}

body[data-lang="en"] .lead,
body[data-lang="ru"] .lead {
  font-size: 1.1rem;
  line-height: 1.7;
}

/* --- Subpage Hero: EN/RU --- */
body[data-lang="en"] .hero--subpage .hero__title,
body[data-lang="ru"] .hero--subpage .hero__title {
  font-size: 36px;
  letter-spacing: 1px;
}

body[data-lang="en"] .hero--subpage .hero__description,
body[data-lang="ru"] .hero--subpage .hero__description {
  font-size: 16px;
  line-height: 1.6;
}

/* --- Service Cards: EN/RU --- */
body[data-lang="en"] .service-card h3,
body[data-lang="ru"] .service-card h3 {
  font-size: 1.1rem;
  letter-spacing: 0.3px;
}

body[data-lang="en"] .service-card p,
body[data-lang="ru"] .service-card p {
  font-size: 0.9rem;
  line-height: 1.6;
}

/* --- Value Cards: EN/RU --- */
body[data-lang="en"] .value-card h3,
body[data-lang="ru"] .value-card h3 {
  font-size: 1rem;
  letter-spacing: 0.3px;
}

body[data-lang="en"] .value-card p,
body[data-lang="ru"] .value-card p {
  font-size: 0.85rem;
  line-height: 1.55;
}

/* --- Timeline: EN/RU --- */
body[data-lang="en"] .timeline-item__title,
body[data-lang="ru"] .timeline-item__title {
  font-size: 1.15rem;
}

body[data-lang="en"] .timeline-item__description,
body[data-lang="ru"] .timeline-item__description {
  font-size: 0.9rem;
  line-height: 1.6;
}

/* --- Stats: EN/RU --- */
body[data-lang="en"] .stat-number,
body[data-lang="ru"] .stat-number {
  font-size: 2rem;
}

body[data-lang="en"] .stat-label,
body[data-lang="ru"] .stat-label {
  font-size: 0.8rem;
  letter-spacing: 0.5px;
}

/* --- CTA Banner: EN/RU --- */
body[data-lang="en"] .cta-banner h2,
body[data-lang="ru"] .cta-banner h2 {
  font-size: 1.8rem;
  letter-spacing: 0.5px;
}

body[data-lang="en"] .cta-banner p,
body[data-lang="ru"] .cta-banner p {
  font-size: 1rem;
  line-height: 1.6;
}

/* --- Buttons: EN/RU slightly smaller text --- */
body[data-lang="en"] .btn,
body[data-lang="ru"] .btn {
  font-size: 0.8rem;
  letter-spacing: 0.08em;
}

/* --- Project Cards: EN/RU --- */
body[data-lang="en"] .project-card__title,
body[data-lang="ru"] .project-card__title {
  font-size: 1.15rem;
  letter-spacing: 0.3px;
}

/* --- Industries: EN/RU --- */
body[data-lang="en"] .industry-item__name,
body[data-lang="ru"] .industry-item__name {
  font-size: 0.85rem;
  letter-spacing: 0.05em;
}

/* --- Contact Page: EN/RU --- */
body[data-lang="en"] .contact-value,
body[data-lang="ru"] .contact-value {
  font-size: 1rem !important;
}

/* --- Footer: EN/RU --- */
body[data-lang="en"] .footer-heading,
body[data-lang="ru"] .footer-heading {
  font-size: 0.85rem;
  letter-spacing: 0.08em;
}

body[data-lang="en"] .footer-links a,
body[data-lang="ru"] .footer-links a {
  font-size: 0.9rem;
}

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

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

ul, ol { list-style: none; }

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* --- Utility Classes --- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-8);
}

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

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

.section {
  padding: var(--section-padding) 0;
}

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

.section--light {
  background: var(--color-off-white);
}

.section--accent {
  background: var(--color-primary-light);
  color: var(--color-white);
}

/* Text utilities */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.text-light { color: var(--color-text-light); }
.text-white { color: var(--color-white); }
.text-accent { color: var(--color-accent); }

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: var(--weight-semibold);
  line-height: var(--leading-tight);
  color: var(--color-text);
}

.section--dark h1,
.section--dark h2,
.section--dark h3,
.section--dark h4,
.section--accent h1,
.section--accent h2,
.section--accent h3,
.section--accent h4 {
  color: var(--color-white);
}

h1 { font-size: var(--text-hero); letter-spacing: -0.02em; }
h2 { font-size: var(--text-4xl); letter-spacing: -0.01em; }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }
h5 { font-size: var(--text-lg); }

.section-label {
  display: inline-block;
  font-size: 14px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--color-accent);
  margin-bottom: var(--space-4);
}

.section--dark .section-label,
.section--accent .section-label {
  color: var(--color-accent-light);
}

.section-title {
  position: relative;
  font-size: 48px;
  font-weight: 700;
  line-height: var(--leading-tight);
  margin-bottom: var(--space-6);
  letter-spacing: 1px;
  color: #28243F;
  text-transform: uppercase;
  padding-top: 30px;
}

.section-title::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 60px;
  height: 4px;
  background: #c62828;
  margin-bottom: 20px;
}

.section-subtitle {
  font-size: var(--text-lg);
  font-weight: var(--weight-regular);
  line-height: var(--leading-relaxed);
  color: var(--color-text-light);
  max-width: 640px;
}

.section--dark .section-subtitle,
.section--accent .section-subtitle {
  color: rgba(255, 255, 255, 0.7);
}

.lead {
  font-size: var(--text-xl);
  line-height: var(--leading-relaxed);
  color: var(--color-dark-gray);
}

/* --- Header & Navigation --- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  display: flex;
  align-items: center;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.header--transparent {
  background: transparent;
}

.header--scrolled {
  background: rgba(255, 255, 255, 0.98);
  box-shadow: 0 1px 0 var(--color-border);
}

.header--scrolled .nav-link {
  color: var(--color-text);
}

.header--scrolled .logo-text {
  color: var(--color-primary);
}

.header--scrolled .lang-btn {
  color: var(--color-text);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 var(--space-8);
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  z-index: 1001;
}

.logo-icon {
  width: 42px;
  height: 42px;
  flex-shrink: 0;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.logo-text {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-white);
  letter-spacing: 1px;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  line-height: 1.25;
  white-space: nowrap;
}

.logo-text span {
  display: block;
  font-size: 0.7rem;
  font-weight: var(--weight-medium);
  opacity: 0.7;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-top: 1px;
}

/* Navigation */
.nav {
  display: flex;
  align-items: center;
  gap: var(--space-10);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav-link {
  font-size: 14px;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.9);
  text-transform: uppercase;
  letter-spacing: 1px;
  padding: var(--space-2) 0;
  position: relative;
  transition: color var(--transition-fast);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width var(--transition-base);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-link:hover {
  color: var(--color-white);
}

.header--scrolled .nav-link:hover {
  color: var(--color-accent);
}

/* Language Switcher */
.lang-switcher {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  margin-left: var(--space-6);
}

.lang-btn {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  color: rgba(255, 255, 255, 0.7);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.lang-btn:hover {
  color: var(--color-white);
}

.lang-btn.active {
  color: var(--color-white);
  background: rgba(255, 255, 255, 0.15);
}

.header--scrolled .lang-btn:hover {
  color: var(--color-accent);
}

.header--scrolled .lang-btn.active {
  color: var(--color-accent);
  background: rgba(198, 40, 40, 0.1);
}

.lang-divider {
  color: rgba(255, 255, 255, 0.3);
  font-size: var(--text-xs);
  user-select: none;
}

.header--scrolled .lang-divider {
  color: var(--color-border);
}

/* --- Expanded Header (at top) --- */
.header--expanded {
  height: 160px;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.header--expanded .logo-icon {
  width: 72px;
  height: 72px;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.header--expanded .logo-text {
  font-size: 28px;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.header--expanded .logo-text span {
  font-size: 0.95rem;
}

/* Scrolled state shrinks */
.header--scrolled .logo-icon {
  width: 40px;
  height: 40px;
}

.header--scrolled .logo-text {
  font-size: 18px;
}

.header--scrolled .logo-text span {
  font-size: 0.7rem;
}

/* Mobile menu toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 28px;
  padding: 4px 0;
  z-index: 1001;
}

.menu-toggle span {
  width: 100%;
  height: 2px;
  background: var(--color-white);
  transition: all var(--transition-base);
  display: block;
}

.header--scrolled .menu-toggle span {
  background: var(--color-text);
}

.menu-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* --- Hero Section --- */
.hero {
  position: relative;
  height: 100vh;
  min-height: 700px;
  display: flex;
  align-items: center;
  background: var(--color-primary);
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero__bg-image {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero__bg-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(10, 22, 40, 0.82) 0%,
    rgba(10, 22, 40, 0.55) 50%,
    rgba(10, 22, 40, 0.7) 100%
  );
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-8);
  padding-top: var(--header-height);
}

.hero__label {
  display: inline-block;
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--color-accent-light);
  margin-bottom: var(--space-6);
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 0.8s var(--transition-slow) forwards;
  animation-delay: 0.2s;
}

.hero__title {
  font-size: 56px;
  font-weight: 700;
  color: var(--color-white);
  line-height: var(--leading-tight);
  max-width: 800px;
  margin-bottom: var(--space-8);
  opacity: 0;
  transform: translateY(30px);
  animation: fadeInUp 0.8s var(--transition-slow) forwards;
  animation-delay: 0.4s;
  text-transform: uppercase;
  letter-spacing: 2px;
}

.hero__description {
  font-size: 20px;
  color: rgba(255, 255, 255, 0.85);
  line-height: var(--leading-relaxed);
  max-width: 580px;
  margin-bottom: var(--space-12);
  opacity: 0;
  transform: translateY(30px);
  animation: fadeInUp 0.8s var(--transition-slow) forwards;
  animation-delay: 0.6s;
}

.hero__cta {
  display: flex;
  gap: var(--space-4);
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 0.8s var(--transition-slow) forwards;
  animation-delay: 0.8s;
}

/* Hero scroll indicator */
.hero__scroll {
  position: absolute;
  bottom: var(--space-10);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  color: rgba(255, 255, 255, 0.5);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  animation: fadeInUp 0.8s var(--transition-slow) forwards;
  animation-delay: 1.2s;
  opacity: 0;
}

.hero__scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, rgba(255,255,255,0.5), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

/* Hero subpage modifier */
.hero--subpage {
  height: 92vh;
  min-height: 680px;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  border-radius: var(--radius-sm);
  transition: all var(--transition-base);
  border: 2px solid transparent;
  white-space: nowrap;
}

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

.btn--primary:hover {
  background: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(198, 40, 40, 0.35);
}

.btn--outline {
  background: transparent;
  color: var(--color-white);
  border-color: rgba(255, 255, 255, 0.4);
}

.btn--outline:hover {
  border-color: var(--color-white);
  background: rgba(255, 255, 255, 0.1);
}

.btn--outline-dark {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}

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

.btn--large {
  padding: var(--space-5) var(--space-10);
  font-size: var(--text-base);
}

.btn-arrow {
  transition: transform var(--transition-fast);
}

.btn:hover .btn-arrow {
  transform: translateX(4px);
}

/* --- Stats Bar --- */
.stats-bar {
  background: var(--color-white);
  padding: var(--space-16) 0;
  border-bottom: 1px solid var(--color-border);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--grid-gap);
  text-align: center;
}

.stat-item {
  padding: var(--space-4);
}

.stat-number {
  font-size: var(--text-5xl);
  font-weight: var(--weight-bold);
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: var(--space-3);
}

.stat-number span {
  color: var(--color-accent);
}

.stat-label {
  font-size: var(--text-sm);
  color: var(--color-text-light);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* --- Services / Capabilities Grid --- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--grid-gap);
}

.service-card {
  padding: var(--space-10) var(--space-8);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

.service-card:hover::before {
  transform: scaleX(1);
}

.service-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.service-icon {
  width: 48px;
  height: 48px;
  margin-bottom: var(--space-6);
  color: var(--color-accent);
}

/* --- Values Grid (About Page) --- */
.values-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--grid-gap);
}

.value-card {
  padding: var(--space-8);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: all var(--transition-base);
}

.value-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.value-card__icon {
  width: 56px;
  height: 56px;
  margin: 0 auto var(--space-6);
  color: var(--color-accent);
}

.value-card__icon svg {
  width: 100%;
  height: 100%;
}

.value-card h3 {
  font-size: var(--text-xl);
  font-weight: var(--weight-semibold);
  margin-bottom: var(--space-3);
  color: var(--color-text);
}

.value-card p {
  font-size: var(--text-sm);
  color: var(--color-dark-gray);
  line-height: var(--leading-normal);
}

.service-card h3 {
  font-size: var(--text-xl);
  margin-bottom: var(--space-4);
  font-weight: var(--weight-semibold);
}

.service-card p {
  color: var(--color-text-light);
  line-height: var(--leading-relaxed);
  font-size: var(--text-sm);
}

.service-card .read-more {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-6);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* --- Two Column Layout --- */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

.two-col--reverse {
  direction: rtl;
}

.two-col--reverse > * {
  direction: ltr;
}

.two-col__content {
  max-width: 520px;
}

.two-col__image {
  position: relative;
  width: 100%;
  aspect-ratio: 4/3;
  border-radius: var(--radius-sm);
  overflow: hidden;
}

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

/* --- Project Cards --- */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
}

.project-card {
  position: relative;
  aspect-ratio: 4/3;
  border-radius: 0;
  overflow: hidden;
  cursor: pointer;
}

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

.project-card:hover .project-card__image {
  transform: scale(1.05);
}

.project-card__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(10, 22, 40, 0.9) 0%, rgba(10, 22, 40, 0) 60%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 1.25rem;
  transition: background var(--transition-base);
}

.project-card:hover .project-card__overlay {
  background: linear-gradient(to top, rgba(10, 22, 40, 0.95) 0%, rgba(10, 22, 40, 0.2) 60%);
}

.project-card__tag {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent-light);
  margin-bottom: var(--space-2);
}

.project-card__title {
  font-size: var(--text-xl);
  font-weight: var(--weight-semibold);
  color: var(--color-white);
  margin-bottom: var(--space-2);
}

.project-card__location {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.6);
}

/* Featured project (subtle highlight) */
.project-featured {
  /* Same size as regular cards for uniform grid */
}

/* --- Timeline --- */
.timeline {
  position: relative;
  padding-left: var(--space-16);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-border);
}

.timeline-item {
  position: relative;
  padding-bottom: var(--space-12);
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--space-16) - 5px);
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-accent);
  border: 3px solid var(--color-white);
  box-shadow: 0 0 0 2px var(--color-accent);
}

.timeline-item__year {
  font-size: var(--text-sm);
  font-weight: var(--weight-bold);
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-2);
}

.timeline-item__title {
  font-size: var(--text-xl);
  font-weight: var(--weight-semibold);
  margin-bottom: var(--space-2);
}

.timeline-item__description {
  color: var(--color-text-light);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
}

/* --- Map Section --- */
.map-section {
  position: relative;
  background: var(--color-primary);
  padding: var(--section-padding) 0;
  overflow: hidden;
}

.map-container {
  position: relative;
  width: 100%;
  max-width: 900px;
  margin: 0 auto;
}

.map-svg {
  width: 100%;
  height: auto;
}

.map-dot {
  fill: var(--color-accent);
  animation: mapPulse 2s ease-in-out infinite;
}

.map-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--grid-gap);
  margin-top: var(--space-12);
  text-align: center;
}

/* --- Industries Grid --- */
.industries-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
}

.industry-item {
  position: relative;
  aspect-ratio: 1;
  overflow: hidden;
  cursor: pointer;
}

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

.industry-item:hover .industry-item__image {
  transform: scale(1.08);
}

.industry-item__overlay {
  position: absolute;
  inset: 0;
  background: rgba(10, 22, 40, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-base);
}

.industry-item:hover .industry-item__overlay {
  background: rgba(198, 40, 40, 0.7);
}

.industry-item__name {
  color: var(--color-white);
  font-size: var(--text-lg);
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  text-align: center;
  padding: var(--space-4);
}

/* --- CTA Banner --- */
.cta-banner {
  background: var(--color-accent);
  padding: var(--space-20) 0;
  text-align: center;
}

.cta-eyebrow {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: var(--space-4);
}

.cta-banner h2 {
  color: var(--color-white);
  margin-bottom: var(--space-4);
}

.cta-banner p {
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: var(--space-4);
  font-size: var(--text-lg);
}

.cta-trust {
  font-size: var(--text-sm) !important;
  font-weight: var(--weight-semibold);
  color: rgba(255, 255, 255, 0.5) !important;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-8) !important;
}

.cta-buttons {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
}

.cta-banner .btn--white {
  background: var(--color-white);
  color: var(--color-accent);
  border: 2px solid var(--color-white);
  font-weight: var(--weight-semibold);
}

.cta-banner .btn--white:hover {
  background: rgba(255, 255, 255, 0.9);
}

.cta-banner .btn--outline {
  border-color: rgba(255, 255, 255, 0.6);
}

.cta-banner .btn--outline:hover {
  border-color: var(--color-white);
  background: rgba(255, 255, 255, 0.15);
}

/* --- Contact Form --- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
}

.contact-info-item {
  display: flex;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

.contact-info-icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  color: var(--color-accent);
  margin-top: 2px;
}

.contact-info-label {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-light);
  margin-bottom: var(--space-1);
}

.contact-info-value {
  font-size: var(--text-base);
  color: var(--color-text);
  line-height: var(--leading-normal);
}

.form-group {
  margin-bottom: var(--space-6);
}

.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.form-input,
.form-textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-base);
  font-family: inherit;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-white);
  color: var(--color-text);
  transition: border-color var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(198, 40, 40, 0.1);
}

.form-textarea {
  min-height: 140px;
  resize: vertical;
}

/* Contact Info Item Styles */
.contact-info-item {
  display: flex;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

.contact-info-item > div:first-child {
  display: flex;
  gap: var(--space-4);
}

.contact-label {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-light);
  margin-bottom: var(--space-1);
}

.contact-value {
  font-size: var(--text-base);
  color: var(--color-text);
  line-height: var(--leading-normal);
}

/* Contact Form Wrapper */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

/* --- Footer --- */
.footer {
  background: #28243F;
  color: rgba(255, 255, 255, 0.7);
  padding: var(--space-20) 0 var(--space-8);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-12);
  margin-bottom: var(--space-16);
}

.footer-brand {
  max-width: 320px;
}

.footer-brand .logo-text {
  margin-bottom: var(--space-4);
  font-size: var(--text-xl);
}

.footer-brand p {
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  color: rgba(255, 255, 255, 0.5);
}

.footer-heading {
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--color-white);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-6);
}

.footer-links li {
  margin-bottom: var(--space-3);
}

.footer-links a {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.5);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-white);
}

.footer-contact-item {
  margin-bottom: var(--space-4);
}

.footer-contact-item .contact-label {
  font-size: 0.6875rem;
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: rgba(255, 255, 255, 0.4);
  margin-bottom: var(--space-1);
}

.footer-contact-item .contact-value {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.7);
  line-height: var(--leading-normal);
}

.footer-contact-item .contact-value a {
  color: rgba(255, 255, 255, 0.7);
  transition: color var(--transition-fast);
}

.footer-contact-item .contact-value a:hover {
  color: var(--color-white);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-8);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.4);
}

/* --- Global Reach Grids --- */
.offices-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.regions-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}


/* --- Scroll Animations --- */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.reveal-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-right.visible {
  opacity: 1;
  transform: translateX(0);
}

/* Staggered children */
.stagger-children .reveal:nth-child(1) { transition-delay: 0.1s; }
.stagger-children .reveal:nth-child(2) { transition-delay: 0.2s; }
.stagger-children .reveal:nth-child(3) { transition-delay: 0.3s; }
.stagger-children .reveal:nth-child(4) { transition-delay: 0.4s; }
.stagger-children .reveal:nth-child(5) { transition-delay: 0.5s; }
.stagger-children .reveal:nth-child(6) { transition-delay: 0.6s; }

/* --- Keyframe Animations --- */
@keyframes fadeInUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.5; transform: scaleY(1); }
  50% { opacity: 1; transform: scaleY(1.2); }
}

@keyframes mapPulse {
  0%, 100% { opacity: 0.7; r: 4; }
  50% { opacity: 1; r: 6; }
}

@keyframes counterUp {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ============================================
   RESPONSIVE — COMPREHENSIVE MOBILE OPTIMIZATION
   ============================================ */

/* --- Tablet (≤ 1024px) --- */
@media (max-width: 1024px) {
  /* Mobile nav: slide-in with GPU-accelerated transform */
  .nav-menu {
    display: flex;
    flex-direction: column;
    position: fixed;
    inset: 0;
    background: var(--color-primary);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    gap: var(--space-6);
    padding: var(--space-20) var(--space-8);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-100%);
    will-change: transform, opacity;
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1),
                opacity 0.35s cubic-bezier(0.4, 0, 0.2, 1),
                visibility 0s 0.35s;
  }

  .nav-menu.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1),
                opacity 0.35s cubic-bezier(0.4, 0, 0.2, 1),
                visibility 0s 0s;
  }

  .nav-menu .nav-link {
    font-size: var(--text-xl);
    color: var(--color-white);
    padding: var(--space-3) var(--space-4);
    min-height: 48px;
    display: flex;
    align-items: center;
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 0.3s ease, transform 0.3s ease;
  }

  .nav-menu.open .nav-link {
    opacity: 1;
    transform: translateY(0);
  }

  /* Stagger link animations */
  .nav-menu.open li:nth-child(1) .nav-link { transition-delay: 0.1s; }
  .nav-menu.open li:nth-child(2) .nav-link { transition-delay: 0.15s; }
  .nav-menu.open li:nth-child(3) .nav-link { transition-delay: 0.2s; }
  .nav-menu.open li:nth-child(4) .nav-link { transition-delay: 0.25s; }
  .nav-menu.open li:nth-child(5) .nav-link { transition-delay: 0.3s; }
  .nav-menu.open li:nth-child(6) .nav-link { transition-delay: 0.35s; }

  .menu-toggle {
    display: flex;
    min-width: 44px;
    min-height: 44px;
    align-items: center;
    justify-content: center;
  }

  /* Remove backdrop-filter when menu is open (prevents containing block bug) */
  .header.menu-open {
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
    background: transparent !important;
  }

  .header.menu-open .logo-text {
    color: var(--color-white) !important;
  }

  .header.menu-open .menu-toggle span {
    background: var(--color-white) !important;
  }

  /* Language switcher */
  .lang-switcher {
    display: none;
  }

  .nav-menu.open + .lang-switcher,
  .nav-menu.open ~ .lang-switcher {
    display: flex;
    position: fixed;
    bottom: var(--space-10);
    left: 50%;
    transform: translateX(-50%);
    z-index: 1001;
  }

  .nav-menu.open ~ .lang-switcher .lang-btn {
    font-size: var(--text-sm);
    padding: var(--space-2) var(--space-3);
    min-width: 40px;
    min-height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white) !important;
  }

  .nav-menu.open ~ .lang-switcher .lang-divider {
    color: rgba(255, 255, 255, 0.4) !important;
  }

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

  .project-featured {
    /* uniform grid - no spanning */
  }

  .two-col {
    grid-template-columns: 1fr;
    gap: var(--space-10);
  }

  .two-col__content {
    max-width: 100%;
  }

  .two-col--reverse {
    direction: ltr;
  }

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

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

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

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

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

  /* Section title scaling */
  .section-title {
    font-size: 36px;
  }

  /* EN/RU tablet scaling */
  body[data-lang="en"] .hero__title,
  body[data-lang="ru"] .hero__title {
    font-size: 34px;
  }

  body[data-lang="en"] .section-title,
  body[data-lang="ru"] .section-title {
    font-size: 28px;
  }

  body[data-lang="en"] .hero--subpage .hero__title,
  body[data-lang="ru"] .hero--subpage .hero__title {
    font-size: 30px;
  }
}

/* --- Mobile (≤ 768px) --- */
@media (max-width: 768px) {
  :root {
    --section-padding: 3.5rem;
    --header-height: 60px;
  }

  /* --- Mobile Header --- */
  .header {
    height: var(--header-height);
  }

  .header--expanded {
    height: var(--header-height);
  }

  .header--expanded .logo-icon {
    width: 36px;
    height: 36px;
  }

  .header--expanded .logo-text {
    font-size: 13px;
  }

  .header--expanded .logo-text span {
    font-size: 0.6rem;
  }

  .logo-icon {
    width: 36px;
    height: 36px;
  }

  .logo-text {
    font-size: 13px;
    line-height: 1.3;
  }

  .logo-text span {
    font-size: 0.6rem;
    letter-spacing: 0.03em;
  }

  .header--scrolled .logo-icon {
    width: 32px;
    height: 32px;
  }

  .header--scrolled .logo-text {
    font-size: 12px;
  }

  /* --- Mobile Hero --- */
  .hero {
    min-height: 500px;
    height: 85vh;
  }

  .hero__label {
    font-size: var(--text-xs);
    letter-spacing: 0.15em;
    margin-bottom: var(--space-4);
  }

  .hero__title {
    font-size: clamp(1.75rem, 8vw, 2.5rem);
    letter-spacing: 1px;
    margin-bottom: var(--space-6);
  }

  .hero__description {
    font-size: 15px;
    line-height: 1.7;
    max-width: 100%;
    margin-bottom: var(--space-8);
  }

  .hero__content {
    padding-top: calc(var(--header-height) + 2rem);
  }

  .hero--subpage {
    height: 80vh;
    min-height: 480px;
  }

  .hero--subpage .hero__title {
    font-size: clamp(1.5rem, 7vw, 2.2rem);
  }

  .hero--subpage .hero__description {
    font-size: 14px;
  }

  .hero__cta {
    flex-direction: column;
    gap: var(--space-3);
  }

  .hero__cta .btn {
    width: 100%;
    justify-content: center;
    padding: var(--space-4) var(--space-6);
  }

  /* --- Mobile Section Typography --- */
  .section-title {
    font-size: clamp(1.5rem, 6vw, 2rem);
    padding-top: 24px;
    margin-bottom: var(--space-4);
  }

  .section-title::before {
    width: 40px;
    height: 3px;
  }

  .section-label {
    font-size: 12px;
    letter-spacing: 1.5px;
  }

  .section-subtitle {
    font-size: var(--text-base);
    max-width: 100%;
  }

  .lead {
    font-size: var(--text-base);
    line-height: 1.7;
  }

  /* --- Mobile Stats Bar --- */
  .stats-bar {
    padding: var(--space-10) 0;
  }

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

  .stat-item {
    padding: var(--space-3);
  }

  .stat-number {
    font-size: var(--text-2xl);
    margin-bottom: var(--space-2);
  }

  .stat-label {
    font-size: var(--text-xs);
  }

  /* --- Mobile Services Grid --- */
  .services-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
    margin-top: 2rem !important;
  }

  .service-card {
    padding: var(--space-6) var(--space-5);
  }

  .service-icon {
    width: 40px;
    height: 40px;
    margin-bottom: var(--space-4);
  }

  .service-card h3 {
    font-size: var(--text-lg);
    margin-bottom: var(--space-3);
  }

  .service-card p {
    font-size: var(--text-sm);
    line-height: 1.65;
  }

  /* --- Mobile Two Column --- */
  .two-col {
    gap: var(--space-8);
  }

  .two-col__image {
    aspect-ratio: 16/10;
    min-height: auto !important;
  }

  /* --- Mobile Projects Grid --- */
  .projects-grid {
    grid-template-columns: 1fr;
    gap: var(--space-3);
    margin-top: 2rem !important;
  }

  .project-card {
    aspect-ratio: 16/9;
  }

  .project-featured {
    grid-column: span 1;
  }

  .project-card__title {
    font-size: var(--text-lg);
  }

  .project-card__overlay {
    padding: var(--space-4);
  }

  /* --- Mobile Industries Grid --- */
  .industries-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 2px;
  }

  .industry-item {
    aspect-ratio: 4/3;
  }

  .industry-item__name {
    font-size: var(--text-sm);
    letter-spacing: 0.05em;
  }

  /* --- Mobile Values Grid --- */
  .values-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
    margin-top: 2rem !important;
  }

  .value-card {
    padding: var(--space-5);
  }

  .value-card__icon {
    width: 44px;
    height: 44px;
    margin: 0 auto var(--space-4);
  }

  .value-card h3 {
    font-size: var(--text-base);
    margin-bottom: var(--space-2);
  }

  .value-card p {
    font-size: var(--text-xs);
    line-height: 1.6;
  }

  /* --- Mobile Timeline --- */
  .timeline {
    padding-left: var(--space-8);
  }

  .timeline-item {
    padding-bottom: var(--space-8);
  }

  .timeline-item::before {
    left: calc(-1 * var(--space-8) - 5px);
    width: 10px;
    height: 10px;
  }

  .timeline-item__year {
    font-size: var(--text-xs);
  }

  .timeline-item__title {
    font-size: var(--text-lg);
  }

  .timeline-item__description {
    font-size: var(--text-sm);
  }

  /* --- Mobile Offices Grid --- */
  .offices-grid {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }

  /* --- Mobile Regions Grid --- */
  .regions-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
  }

  /* --- Mobile Contact Page --- */
  .contact-info-item {
    margin-bottom: var(--space-5);
  }

  .contact-info-item > div:first-child {
    gap: var(--space-3);
  }

  .form-input,
  .form-textarea {
    padding: var(--space-3) var(--space-4);
    font-size: 16px; /* Prevents iOS zoom on focus */
  }

  /* --- Mobile CTA Banner --- */
  .cta-banner {
    padding: var(--space-12) 0;
  }

  .cta-banner h2 {
    font-size: clamp(1.3rem, 5vw, 1.8rem);
  }

  .cta-banner p {
    font-size: var(--text-base);
    margin-bottom: var(--space-6);
  }

  /* --- Mobile Footer --- */
  .footer {
    padding: var(--space-12) 0 var(--space-6);
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .footer-brand {
    max-width: 100%;
  }

  .footer-brand .logo-text {
    font-size: var(--text-lg);
  }

  .footer-heading {
    margin-bottom: var(--space-3);
  }

  .footer-links li {
    margin-bottom: var(--space-2);
  }

  .footer-links a {
    min-height: 36px;
    display: inline-flex;
    align-items: center;
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-3);
    text-align: center;
    padding-top: var(--space-6);
  }

  /* --- Mobile Buttons --- */
  .btn {
    padding: var(--space-3) var(--space-6);
    font-size: var(--text-sm);
    min-height: 44px;
  }

  .btn--large {
    padding: var(--space-4) var(--space-8);
  }

  /* --- Mobile EN/RU Typography --- */
  body[data-lang="en"] .hero__title,
  body[data-lang="ru"] .hero__title {
    font-size: clamp(1.4rem, 6.5vw, 2rem);
    letter-spacing: 0.5px;
    max-width: 100%;
  }

  body[data-lang="en"] .hero__description,
  body[data-lang="ru"] .hero__description {
    font-size: 14px;
    line-height: 1.6;
  }

  body[data-lang="en"] .hero--subpage .hero__title,
  body[data-lang="ru"] .hero--subpage .hero__title {
    font-size: clamp(1.2rem, 5.5vw, 1.7rem);
  }

  body[data-lang="en"] .hero--subpage .hero__description,
  body[data-lang="ru"] .hero--subpage .hero__description {
    font-size: 13px;
  }

  body[data-lang="en"] .section-title,
  body[data-lang="ru"] .section-title {
    font-size: clamp(1.2rem, 5vw, 1.6rem);
    letter-spacing: 0.3px;
  }

  body[data-lang="en"] .lead,
  body[data-lang="ru"] .lead {
    font-size: 0.95rem;
    line-height: 1.65;
  }

  body[data-lang="en"] .section-subtitle,
  body[data-lang="ru"] .section-subtitle {
    font-size: 0.9rem;
  }

  body[data-lang="en"] .cta-banner h2,
  body[data-lang="ru"] .cta-banner h2 {
    font-size: clamp(1.1rem, 4.5vw, 1.5rem);
  }

  body[data-lang="en"] .cta-banner p,
  body[data-lang="ru"] .cta-banner p {
    font-size: 0.9rem;
  }

  body[data-lang="en"] .stat-number,
  body[data-lang="ru"] .stat-number {
    font-size: 1.5rem;
  }

  body[data-lang="en"] .stat-label,
  body[data-lang="ru"] .stat-label {
    font-size: 0.7rem;
  }

  body[data-lang="en"] .service-card h3,
  body[data-lang="ru"] .service-card h3 {
    font-size: 1rem;
  }

  body[data-lang="en"] .service-card p,
  body[data-lang="ru"] .service-card p {
    font-size: 0.82rem;
    line-height: 1.55;
  }

  body[data-lang="en"] .value-card h3,
  body[data-lang="ru"] .value-card h3 {
    font-size: 0.85rem;
  }

  body[data-lang="en"] .value-card p,
  body[data-lang="ru"] .value-card p {
    font-size: 0.75rem;
    line-height: 1.5;
  }

  body[data-lang="en"] .btn,
  body[data-lang="ru"] .btn {
    font-size: 0.75rem;
    letter-spacing: 0.06em;
  }

  body[data-lang="en"] .project-card__title,
  body[data-lang="ru"] .project-card__title {
    font-size: 1rem;
  }

  body[data-lang="en"] .footer-heading,
  body[data-lang="ru"] .footer-heading {
    font-size: 0.8rem;
  }

  body[data-lang="en"] .footer-links a,
  body[data-lang="ru"] .footer-links a {
    font-size: 0.85rem;
  }

  body[data-lang="en"] .contact-value,
  body[data-lang="ru"] .contact-value {
    font-size: 0.9rem !important;
  }

  body[data-lang="en"] .timeline-item__title,
  body[data-lang="ru"] .timeline-item__title {
    font-size: 1rem;
  }

  body[data-lang="en"] .timeline-item__description,
  body[data-lang="ru"] .timeline-item__description {
    font-size: 0.82rem;
  }

  body[data-lang="en"] .industry-item__name,
  body[data-lang="ru"] .industry-item__name {
    font-size: 0.75rem;
    letter-spacing: 0.03em;
  }
}

/* --- Small Phone (≤ 480px) --- */
@media (max-width: 480px) {
  :root {
    --section-padding: 2.5rem;
  }

  .container {
    padding: 0 var(--space-5);
  }

  /* Stack values 2x2 becomes 1 column for very small screens */
  .values-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3);
  }

  .regions-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.5rem;
  }

  .stat-number {
    font-size: var(--text-xl);
  }

  .stat-label {
    font-size: 0.65rem;
  }

  /* Contact page icon boxes */
  .contact-info-item > div:first-child > div:first-child {
    width: 44px !important;
    height: 44px !important;
    min-width: 44px;
  }

  .contact-info-item > div:first-child > div:first-child svg {
    width: 22px !important;
    height: 22px !important;
  }

  .contact-value {
    font-size: 0.95rem !important;
  }

  /* Map section on small screens */
  #map-leaflet {
    height: 260px !important;
  }

  /* Footer compact */
  .footer-grid {
    gap: var(--space-5);
  }

  /* EN/RU small phone */
  body[data-lang="en"] .hero__title,
  body[data-lang="ru"] .hero__title {
    font-size: clamp(1.2rem, 5.5vw, 1.6rem);
  }

  body[data-lang="en"] .section-title,
  body[data-lang="ru"] .section-title {
    font-size: clamp(1.1rem, 4.5vw, 1.4rem);
  }

  body[data-lang="en"] .stat-number,
  body[data-lang="ru"] .stat-number {
    font-size: 1.25rem;
  }

  body[data-lang="en"] .stat-label,
  body[data-lang="ru"] .stat-label {
    font-size: 0.6rem;
  }
}

/* --- iOS safe area support --- */
@supports (padding-bottom: env(safe-area-inset-bottom)) {
  .footer {
    padding-bottom: calc(var(--space-6) + env(safe-area-inset-bottom));
  }

  .hero {
    padding-top: env(safe-area-inset-top);
  }
}

/* --- Touch device optimizations --- */
@media (hover: none) and (pointer: coarse) {
  /* Remove hover-dependent effects on touch */
  .service-card:hover {
    transform: none;
    box-shadow: var(--shadow-sm);
  }

  .value-card:hover {
    transform: none;
    box-shadow: var(--shadow-sm);
  }

  .project-card:hover .project-card__image {
    transform: none;
  }

  .industry-item:hover .industry-item__image {
    transform: none;
  }

  /* Ensure tap targets are large enough */
  .nav-link,
  .footer-links a,
  .btn,
  .lang-btn {
    min-height: 44px;
  }

  /* Active states for touch feedback */
  .btn:active {
    transform: scale(0.97);
    transition: transform 0.1s;
  }

  .service-card:active {
    transform: scale(0.98);
  }

  .project-card:active .project-card__image {
    transform: scale(1.02);
  }
}

/* --- Placeholder Image Styles --- */
.placeholder-img {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.3);
  background-size: cover;
  background-position: center;
}

/* Loading animation */
.page-transition {
  position: fixed;
  inset: 0;
  background: var(--color-primary);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.5s, visibility 0.5s;
}

.page-transition.loaded {
  opacity: 0;
  visibility: hidden;
}