:root {
  /* Primary color palette */
  --primary-color: #1a2a3a; /* Dark navy blue - military-inspired */
  --primary-light: #34465a;
  --primary-dark: #0e1825;
  
  /* Secondary color palette */
  --accent-color: #c91f1f; /* Deep red - power and urgency */
  --accent-light: #e63636;
  --accent-dark: #a51818;
  
  /* Tertiary color */
  --tertiary-color: #4a7c94; /* Steel blue - technical, precision */
  --tertiary-light: #628ca5;
  --tertiary-dark: #366277;
  
  /* Neutral colors */
  --neutral-dark: #1e1e1e;
  --neutral-medium: #676767;
  --neutral-light: #f0f0f0;
  --white: #ffffff;
  
  /* Typography */
  --heading-font: 'Rajdhani', sans-serif; /* Technical, modern feel */
  --body-font: 'Roboto Condensed', sans-serif; /* Clean, military-style */
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;
  
  /* Border radius */
  --border-radius-sm: 3px;
  --border-radius-md: 5px;
  --border-radius-lg: 8px;
  
  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.2);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--body-font);
  color: var(--neutral-dark);
  line-height: 1.5;
  background-color: var(--neutral-light);
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--heading-font);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

h1 {
  font-size: 3.5rem;
  line-height: 1.1;
  font-weight: 700;
  letter-spacing: 1px;
}

h2 {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
  color: var(--primary-color);
  position: relative;
  display: inline-block;
}

h2::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 0;
  width: 60px;
  height: 4px;
  background-color: var(--accent-color);
}

h3 {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-xs);
}

p {
  margin-bottom: var(--spacing-sm);
}

a {
  color: var(--accent-color);
  text-decoration: none;
  transition: all 0.3s ease;
}

a:hover {
  color: var(--accent-light);
}

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

.container {
  width: 100%;
  max-width: 1300px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* Button Styles */
.button, .cta-button, .secondary-button, .nav-button, .view-more {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: var(--border-radius-sm);
  font-family: var(--heading-font);
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  transition: all 0.3s ease;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.cta-button {
  background-color: var(--accent-color);
  color: var(--white);
  font-size: 1.1rem;
  padding: 1rem 2rem;
  box-shadow: var(--shadow-md);
  border: none;
}

.cta-button:hover {
  background-color: var(--accent-dark);
  color: var(--white);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.secondary-button {
  background-color: transparent;
  color: var(--primary-color);
  border: 2px solid var(--primary-color);
  padding: 0.6rem 1.3rem;
}

.secondary-button:hover {
  background-color: var(--primary-color);
  color: var(--white);
}

.nav-button {
  background-color: var(--accent-color);
  color: var(--white);
  padding: 0.5rem 1.25rem;
  border: none;
}

.nav-button:hover {
  background-color: var(--accent-dark);
  color: var(--white);
}

.view-more {
  background-color: transparent;
  color: var(--tertiary-color);
  border: 1px solid var(--tertiary-color);
  padding: 0.5rem 1.25rem;
  margin-top: var(--spacing-md);
  display: inline-block;
  font-size: 0.9rem;
  text-transform: uppercase;
}

.view-more:hover {
  background-color: var(--tertiary-color);
  color: var(--white);
}

.aircraft-link {
  display: inline-block;
  color: var(--tertiary-dark);
  font-weight: 600;
  margin-top: 0.5rem;
  position: relative;
  padding-right: 1.5rem;
}

.aircraft-link::after {
  content: '→';
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  transition: right 0.3s ease;
}

.aircraft-link:hover {
  color: var(--accent-color);
}

.aircraft-link:hover::after {
  right: -5px;
}

/* Header & Navigation */
#header {
  background-color: var(--primary-color);
  box-shadow: var(--shadow-md);
  padding: 0.75rem 0;
  position: sticky;
  top: 0;
  width: 100%;
  z-index: 100;
}

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

.logo a {
  font-family: var(--heading-font);
  font-weight: 700;
  font-size: 1.75rem;
  color: var(--white);
  letter-spacing: 2px;
}

.logo span {
  color: var(--accent-color);
  font-weight: 500;
  font-size: 1.5rem;
}

.main-nav ul {
  display: flex;
  list-style: none;
}

.main-nav li {
  margin: 0 1rem;
}

.main-nav a {
  color: var(--white);
  font-weight: 500;
  position: relative;
  font-family: var(--heading-font);
  font-size: 1.1rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.main-nav a:hover {
  color: var(--accent-light);
}

.main-nav a::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: -4px;
  left: 0;
  background-color: var(--accent-color);
  transition: width 0.3s ease;
}

.main-nav a:hover::after {
  width: 100%;
}

.menu-toggle {
  display: none;
  flex-direction: column;
  cursor: pointer;
}

.menu-toggle span {
  width: 25px;
  height: 3px;
  background-color: var(--white);
  margin: 3px 0;
  transition: all 0.3s ease;
}

/* Hero Section */
.hero-section {
  background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.7)), url('/images/f16-bl50.jpg');
  background-size: cover;
  background-position: center;
  color: var(--white);
  padding: var(--spacing-xl) 0;
  text-align: center;
  min-height: 85vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(45deg, rgba(201, 31, 31, 0.15), transparent);
  z-index: 1;
}

.hero-content {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  position: relative;
  z-index: 5;
}

.hero-section h1 {
  color: var(--white);
  margin-bottom: var(--spacing-md);
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}

.hero-subtitle {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-lg);
  font-weight: 400;
  opacity: 0.9;
}

/* Featured Aircraft Section */
.featured-section {
  padding: var(--spacing-xl) var(--spacing-md);
  background-color: var(--white);
  text-align: center;
}

.aircraft-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-md);
  max-width: 1300px;
  margin: 0 auto;
}

.aircraft-card {
  background-color: var(--neutral-light);
  border-radius: var(--border-radius-md);
  padding: var(--spacing-md);
  box-shadow: var(--shadow-md);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  text-align: left;
  border-bottom: 3px solid transparent;
}

.aircraft-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-bottom-color: var(--accent-color);
}

.aircraft-image {
  height: 200px;
  background-size: cover;
  background-position: center;
  border-radius: var(--border-radius-sm);
  margin-bottom: var(--spacing-sm);
  position: relative;
  overflow: hidden;
}

.aircraft-image::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(to bottom, transparent 50%, rgba(0, 0, 0, 0.7));
  z-index: 1;
}

.fighter-jet {
  background-image: url('images/fighter-jet.jpg');
}

.helicopter {
  background-image: url('images/attack-helicopter.jpg');
}

/* Categories Section */
.categories-section {
  padding: var(--spacing-xl) var(--spacing-md);
  background-color: var(--primary-light);
  color: var(--white);
}

.category-container {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-around;
  gap: var(--spacing-lg);
  max-width: 1200px;
  margin: 0 auto;
}

.category {
  flex: 1;
  min-width: 300px;
  max-width: 500px;
  text-align: center;
  padding: var(--spacing-md);
  background-color: rgba(255, 255, 255, 0.05);
  border-radius: var(--border-radius-md);
  backdrop-filter: blur(10px);
  transition: transform 0.3s ease;
}

.category:hover {
  transform: scale(1.02);
}

.category-icon {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background-color: var(--accent-color);
  margin: 0 auto var(--spacing-md);
  background-size: 60px;
  background-position: center;
  background-repeat: no-repeat;
  border: 4px solid rgba(255, 255, 255, 0.1);
}

.fighters {
  background-image: url('images/fighter-icon.svg');
}

.helicopters {
  background-image: url('images/helicopter-icon.svg');
}

.category h3 {
  color: var(--white);
  margin-bottom: var(--spacing-sm);
}

.category .secondary-button {
  background-color: transparent;
  color: var(--white);
  border: 2px solid var(--white);
  margin-top: var(--spacing-sm);
}

.category .secondary-button:hover {
  background-color: var(--white);
  color: var(--primary-color);
}

/* Technology Section */
.technology-section {
  padding: var(--spacing-xl) var(--spacing-md);
  background-color: var(--neutral-light);
  text-align: center;
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-md);
  max-width: 1200px;
  margin: 0 auto;
}

.tech-card {
  background-color: var(--white);
  border-radius: var(--border-radius-md);
  padding: var(--spacing-md);
  box-shadow: var(--shadow-md);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  border-top: 3px solid var(--tertiary-color);
}

.tech-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-top-color: var(--accent-color);
}

.tech-icon {
  width: 70px;
  height: 70px;
  border-radius: 50%;
  background-color: var(--tertiary-light);
  margin: 0 auto var(--spacing-sm);
  background-size: 40px;
  background-position: center;
  background-repeat: no-repeat;
}

.stealth {
  background-image: url('images/stealth-icon.svg');
}

.avionics {
  background-image: url('images/avionics-icon.svg');
}

.weapons {
  background-image: url('images/weapons-icon.svg');
}

.propulsion {
  background-image: url('images/propulsion-icon.svg');
}

/* Comparison Section */
.comparison-section {
  padding: var(--spacing-xl) var(--spacing-md);
  background-color: var(--white);
  text-align: center;
}

.table-responsive {
  overflow-x: auto;
  margin-bottom: var(--spacing-md);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  margin: 0 auto;
  background-color: var(--white);
  box-shadow: var(--shadow-md);
}

.comparison-table th,
.comparison-table td {
  padding: 1rem;
  text-align: left;
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.comparison-table th {
  background-color: var(--primary-color);
  color: var(--white);
  font-family: var(--heading-font);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.comparison-table tr:nth-child(even) {
  background-color: rgba(74, 124, 148, 0.05);
}

.comparison-table tr:hover {
  background-color: rgba(201, 31, 31, 0.05);
}

/* Gallery Section */
.gallery-section {
  padding: var(--spacing-xl) var(--spacing-md);
  background-color: var(--neutral-light);
  text-align: center;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-sm);
  max-width: 1200px;
  margin: 0 auto;
}

.gallery-item {
  position: relative;
  overflow: hidden;
  border-radius: var(--border-radius-sm);
  box-shadow: var(--shadow-md);
  transition: transform 0.3s ease;
  height: 250px;
}

.gallery-item:hover {
  transform: scale(1.02);
}

.gallery-image {
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  transition: transform 0.5s ease;
}

.gallery-item:hover .gallery-image {
  transform: scale(1.1);
}

.image-caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 1rem;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
  color: var(--white);
  font-family: var(--heading-font);
  text-align: left;
}

.image-1 {
  background-image: url('images/gallery-1.jpg');
}

.image-2 {
  background-image: url('images/gallery-2.jpg');
}

.image-3 {
  background-image: url('images/gallery-3.jpg');
}

.image-4 {
  background-image: url('images/gallery-4.jpg');
}

.image-5 {
  background-image: url('images/gallery-5.jpg');
}

.image-6 {
  background-image: url('images/gallery-6.jpg');
}

/* Newsletter Section */
.newsletter-section {
  padding: var(--spacing-xl) var(--spacing-md);
  background: linear-gradient(rgba(0, 0, 0, 0.8), rgba(0, 0, 0, 0.8)), url('images/newsletter-bg.jpg');
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  color: var(--white);
  text-align: center;
}

.newsletter-content {
  max-width: 700px;
  margin: 0 auto;
}

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

.newsletter-form {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
  margin-top: var(--spacing-md);
}

.newsletter-form input {
  flex: 1;
  min-width: 250px;
  padding: 1rem;
  border: none;
  border-radius: var(--border-radius-sm);
  font-family: var(--body-font);
}

.newsletter-form .cta-button {
  min-width: 150px;
}

/* Footer */
footer {
  background-color: var(--primary-dark);
  color: var(--white);
  padding: var(--spacing-lg) var(--spacing-md) var(--spacing-sm);
}

.footer-content {
  max-width: 1300px;
  margin: 0 auto;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-lg);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding-bottom: var(--spacing-md);
}

.footer-logo a {
  font-family: var(--heading-font);
  font-weight: 700;
  font-size: 1.75rem;
  color: var(--white);
}

.footer-logo span {
  color: var(--accent-color);
}

.social-links {
  display: flex;
  gap: 1rem;
}

.social-icon {
  display: block;
  width: 36px;
  height: 36px;
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  transition: background-color 0.3s ease;
  background-position: center;
  background-repeat: no-repeat;
  background-size: 18px;
}

.social-icon:hover {
  background-color: var(--accent-color);
}

.facebook {
  background-image: url('images/facebook-icon.svg');
}

.twitter {
  background-image: url('images/twitter-icon.svg');
}

.instagram {
  background-image: url('images/instagram-icon.svg');
}

.youtube {
  background-image: url('images/youtube-icon.svg');
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.footer-col {
  flex: 1;
  min-width: 200px;
}

.footer-col h4 {
  color: var(--white);
  margin-bottom: var(--spacing-sm);
  position: relative;
  display: inline-block;
}

.footer-col h4::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 30px;
  height: 2px;
  background-color: var(--accent-color);
}

.footer-col ul {
  list-style: none;
}

.footer-col ul li {
  margin-bottom: var(--spacing-xs);
}

.footer-col a {
  color: rgba(255, 255, 255, 0.7);
  transition: color 0.3s ease;
}

.footer-col a:hover {
  color: var(--accent-light);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-md);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.6);
}

/* Media Queries */
@media (max-width: 992px) {
  html {
    font-size: 15px;
  }
  
  .main-nav {
    display: none; /* Would need JS to toggle mobile menu */
  }
  
  .menu-toggle {
    display: flex;
  }
  
  h1 {
    font-size: 3rem;
  }
  
  h2 {
    font-size: 2.2rem;
  }
}

@media (max-width: 768px) {
  html {
    font-size: 14px;
  }
  
  .hero-section h1 {
    font-size: 2.5rem;
  }
  
  .hero-subtitle {
    font-size: 1.2rem;
  }
  
  .footer-top {
    flex-direction: column;
    text-align: center;
    gap: var(--spacing-md);
  }
  
  .footer-col h4::after {
    left: 50%;
    transform: translateX(-50%);
  }
  
  .footer-col {
    text-align: center;
  }
}

@media (max-width: 576px) {
  .newsletter-form {
    flex-direction: column;
  }
  
  .newsletter-form input,
  .newsletter-form .cta-button {
    width: 100%;
  }
  
  .comparison-table th,
  .comparison-table td {
    padding: 0.75rem 0.5rem;
    font-size: 0.9rem;
  }
  
  .categories-section .category {
    min-width: 100%;
  }
}