:root {
  /* Color Palette - Russian Patriotic Military (Premium) */
  --bg-main: #050a14;
  --bg-deep: #050a14;
  --bg-section: #0a140d; /* Dark Olive/Black base */
  --bg-khaki: #2d2e1c;
  
  --text-main: #ffffff;
  --text-muted: rgba(255, 255, 255, 0.6);
  
  --accent-gold: #d4af37;
  --accent-olive: #556b2f;
  --accent-silver: #c0c0c0;
  --accent-khaki: #8b864e;
  
  /* Tricolor Accents */
  --ru-white: #ffffff;
  --ru-blue: #0033a0;
  --ru-red: #da291c;
  
  --gold-gradient: linear-gradient(135deg, #d4af37 0%, #f2d388 50%, #d4af37 100%);
  --military-gradient: linear-gradient(135deg, #1a2a1a 0%, #050a05 100%);
  --tricolor-gradient: linear-gradient(to right, #ffffff 0%, #ffffff 33%, #0033a0 33%, #0033a0 66%, #da291c 66%, #da291c 100%);
  
  /* UI Elements */
  --glass: rgba(255, 255, 255, 0.03);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-gold: rgba(212, 175, 55, 0.05);
  
  /* Spacing & Misc */
  --container-max: 1440px;
  --transition-smooth: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: all 0.3s ease;
  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg-deep);
  color: var(--text-main);
  font-family: var(--font-main);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-deep);
}
::-webkit-scrollbar-thumb {
  background: var(--accent-khaki);
  border-radius: 10px;
}

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 4rem;
}

@media (max-width: 768px) {
  .container { padding: 0 1.5rem; }
}

/* Typography Refinement */
h1, h2, h3, h4 {
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  line-height: 1.1;
}

.gold-gradient-text {
  background: var(--gold-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.tricolor-line {
  height: 4px;
  width: 100px;
  background: var(--tricolor-gradient);
  margin: 1.5rem 0;
}

/* Premium Navigation */
header {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1000;
  transition: var(--transition-smooth);
  padding: 1.5rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

header.scrolled {
  background: rgba(5, 10, 20, 0.9);
  backdrop-filter: blur(20px);
  padding: 1rem 0;
  border-bottom: 1px solid var(--accent-khaki);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 1rem;
  text-decoration: none;
}

.nav-logo img {
  height: 50px;
  width: auto;
  filter: drop-shadow(0 0 5px rgba(212, 175, 55, 0.3));
}

.nav-logo-text {
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--text-main);
  letter-spacing: 2px;
}

.nav-links {
  display: flex;
  gap: 2.5rem;
  align-items: center;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-main);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  transition: var(--transition-fast);
  position: relative;
  opacity: 0.7;
  white-space: nowrap;
}

.nav-links a:hover, .nav-links a.active {
  opacity: 1;
  color: var(--accent-gold);
}

.nav-links a:last-child {
  background: var(--gold-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  border: 1px solid var(--accent-gold);
  padding: 0.5rem 1rem;
  border-radius: 2px;
  opacity: 1;
}

.nav-links a:last-child:hover {
  background: var(--accent-gold);
  -webkit-text-fill-color: var(--bg-deep);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-gold);
  transition: var(--transition-fast);
}

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

.nav-links a:last-child::after {
  display: none;
}

.lang-btn {
  background: transparent;
  border: 1px solid var(--glass-border);
  color: var(--text-main);
  padding: 0.5rem 1rem;
  border-radius: 4px;
  font-weight: 600;
  font-size: 0.8rem;
  cursor: pointer;
  transition: var(--transition-fast);
}

.lang-btn:hover {
  border-color: var(--ru-blue);
  color: var(--ru-blue);
}

/* Hero Section Base */
.hero-section {
  height: 100vh;
  position: relative;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.3) contrast(1.2) grayscale(0.2);
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to bottom, transparent 0%, var(--bg-deep) 100%);
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 1000px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 0.6rem 1.2rem;
  background: rgba(85, 107, 47, 0.2);
  border-left: 4px solid var(--ru-red);
  color: var(--text-main);
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 2rem;
  text-transform: uppercase;
}

.hero h1 {
  font-size: clamp(2.5rem, 8vw, 5.5rem);
  margin-bottom: 2rem;
  text-shadow: 0 10px 30px rgba(0,0,0,0.5);
}

.hero p {
  font-size: 1.2rem;
  color: var(--text-muted);
  margin-bottom: 3rem;
  max-width: 650px;
  border-left: 1px solid var(--glass-border);
  padding-left: 1.5rem;
}

/* Buttons */
.cta-group {
  display: flex;
  gap: 1.5rem;
}

.btn-primary {
  background: var(--gold-gradient);
  color: var(--bg-deep);
  padding: 1.2rem 3.5rem;
  border-radius: 2px;
  text-decoration: none;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  transition: var(--transition-fast);
  box-shadow: 0 0 30px rgba(212, 175, 55, 0.2);
  border: none;
  cursor: pointer;
  position: relative;
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 40px rgba(212, 175, 55, 0.4);
}

.btn-outline {
  background: transparent;
  color: var(--text-main);
  padding: 1.2rem 3.5rem;
  border-radius: 2px;
  text-decoration: none;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  transition: var(--transition-fast);
  border: 1px solid var(--accent-khaki);
}

.btn-outline:hover {
  background: var(--accent-khaki);
  color: white;
}

/* Feature Cards */
.section-header {
  text-align: center;
  margin-bottom: 8rem;
}

.section-header h2 {
  font-size: 3.5rem;
  margin-bottom: 1.5rem;
}

.section-subtitle {
  color: var(--accent-khaki);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.3em;
  display: block;
  margin-bottom: 1rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 3rem;
}

.grid-2-resp {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

@media (max-width: 1024px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-2-resp { gap: 2rem; }
}

@media (max-width: 768px) {
  .grid-3 { grid-template-columns: 1fr; }
  .grid-2-resp { grid-template-columns: 1fr; }
}

.glass-card {
  background: linear-gradient(180deg, rgba(255,255,255,0.05) 0%, rgba(255,255,255,0.02) 100%);
  border: 1px solid rgba(139, 134, 78, 0.2); /* Khaki border */
  padding: 4rem 3rem;
  border-radius: 4px;
  transition: var(--transition-smooth);
  position: relative;
}

.glass-card:hover {
  transform: translateY(-15px);
  border-color: var(--accent-gold);
  background: rgba(139, 134, 78, 0.05);
}

.card-icon {
  font-size: 3rem;
  color: var(--accent-gold);
  margin-bottom: 2.5rem;
  filter: drop-shadow(0 0 10px rgba(212,175,55,0.3));
}

.card-title {
  font-size: 1.6rem;
  margin-bottom: 1.5rem;
  letter-spacing: 1px;
}

.card-text {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* Footer */
footer {
  background: #020508;
  padding: 10rem 0 4rem;
  border-top: 1px solid var(--accent-olive);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 5rem;
  margin-bottom: 8rem;
}

@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

.footer-col h4 {
  color: var(--accent-silver);
  margin-bottom: 2.5rem;
  font-size: 1rem;
  letter-spacing: 2px;
}

.footer-links li {
  list-style: none;
  margin-bottom: 1.2rem;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  transition: var(--transition-fast);
  font-weight: 500;
}

.footer-links a:hover {
  color: var(--accent-gold);
  padding-left: 10px;
}

.social-icons {
  display: flex;
  gap: 1.5rem;
}

.social-icon {
  width: 50px;
  height: 50px;
  border: 1px solid var(--accent-khaki);
  border-radius: 2px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-main);
  text-decoration: none;
  transition: var(--transition-fast);
  font-weight: 800;
  font-size: 0.8rem;
  background: rgba(139, 134, 78, 0.05);
}

.social-icon:hover {
  background: var(--accent-khaki);
  transform: rotate(45deg);
}

.social-icon span {
  transition: var(--transition-fast);
}

.social-icon:hover span {
  transform: rotate(-45deg);
}

.footer-bottom {
  padding-top: 4rem;
  border-top: 1px solid rgba(255,255,255,0.05);
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: rgba(255, 255, 255, 0.2);
  font-size: 0.75rem;
  letter-spacing: 1px;
}

/* Special Sections */
.news-feed {
  display: grid;
  gap: 4rem;
}

.news-card {
  display: grid;
  grid-template-columns: 450px 1fr;
  gap: 0;
  background: var(--bg-section);
  border: 1px solid rgba(139, 134, 78, 0.1);
  overflow: hidden;
}

@media (max-width: 992px) {
  .news-card { grid-template-columns: 1fr; }
}

.news-img-container {
  height: 100%;
  overflow: hidden;
  position: relative;
}

.news-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 1s ease;
}

.news-card:hover .news-img {
  transform: scale(1.1);
}

.news-content {
  padding: 4rem;
  border-left: 1px solid rgba(139, 134, 78, 0.1);
}

.news-tag {
  background: var(--ru-blue);
  color: white;
  padding: 0.4rem 1rem;
  font-size: 0.7rem;
  font-weight: 900;
  display: inline-block;
  margin-bottom: 2rem;
}

/* Reveal Animation */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: all 1.2s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* Mobile Toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 8px;
}

.menu-toggle span {
  width: 35px;
  height: 2px;
  background: var(--text-main);
}

/* Video Background Support */
.video-bg-container {
  position: relative;
  overflow: hidden;
}

.video-bg {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 100%;
  height: 100%;
  transform: translate(-50%, -50%);
  object-fit: cover;
  z-index: -1;
  pointer-events: none;
}

.video-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, rgba(5, 10, 20, 0.4) 0%, rgba(5, 10, 20, 0.8) 100%);
  backdrop-filter: blur(1px);
  z-index: 0;
}

/* Animations */
@keyframes float {
  0% { transform: translateY(0px) rotate(0deg); }
  50% { transform: translateY(-15px) rotate(1deg); }
  100% { transform: translateY(0px) rotate(0deg); }
}

.float-anim {
  animation: float 6s ease-in-out infinite;
}

/* Drone Model Showcase Styles */
.drone-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 4rem;
}

.drone-card {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  padding: 2rem;
  border-radius: 8px;
  transition: var(--transition-fast);
}

.drone-card:hover {
  background: rgba(212, 175, 55, 0.05);
  border-color: var(--accent-gold);
}

.drone-card img {
  width: 100%;
  height: 200px;
  object-fit: contain;
  margin-bottom: 1.5rem;
}

.drone-card h3 {
  color: var(--accent-gold);
  margin-bottom: 1rem;
}

.drone-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
}