:root {
    --primary-color: #667eea;
    --primary-dark: #5a6fd8;
    --secondary-color: #764ba2;
    --accent-color: #f093fb;
    --success-color: #00d4aa;
    --warning-color: #ffc107;
    --danger-color: #ff6b6b;
    --dark-color: #1a202c;
    --light-color: #f7fafc;
    --gray-100: #f7fafc;
    --gray-200: #edf2f7;
    --gray-300: #e2e8f0;
    --gray-400: #cbd5e0;
    --gray-500: #a0aec0;
    --gray-600: #718096;
    --gray-700: #4a5568;
    --gray-800: #2d3748;
    --gray-900: #1a202c;
    --border-radius: 12px;
    --box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    --box-shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.15);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-success: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --gradient-dark: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
  }
  
  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--gray-800);
    line-height: 1.6;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    overflow-x: hidden;
  }
  
  h1, h2, h3, h4, h5, h6 {
    font-family: 'Poppins', sans-serif;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
  }
  
  /* Modern Navbar */
  .navbar {
    background: rgba(255, 255, 255, 0.95) !important;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
    padding: 1rem 0;
  }
    .navbar-brand {
    font-weight: 800;
    font-size: 1.5rem;
    background: var(--gradient-primary);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.5px;
  }
  
  .navbar-nav .nav-link {
    font-weight: 500;
    color: var(--gray-700) !important;
    padding: 0.5rem 1rem !important;
    border-radius: 8px;
    transition: var(--transition);
    position: relative;
  }
  
  .navbar-nav .nav-link:hover {
    color: var(--primary-color) !important;
    background: rgba(102, 126, 234, 0.1);
    transform: translateY(-1px);
  }
  
  /* Hero Section */
  .masthead {
    background: var(--gradient-primary);
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
  }
  
  .masthead::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"><polygon fill="rgba(255,255,255,0.05)" points="0,1000 1000,0 1000,1000"/></svg>');
    pointer-events: none;
  }
  
  .masthead h1 {
    font-size: 3.5rem;
    font-weight: 800;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    margin-bottom: 2rem;
    animation: slideInUp 1s ease-out;
  }
  
  .masthead p {
    font-size: 1.25rem;
    font-weight: 400;
    opacity: 0.9;
    animation: slideInUp 1s ease-out 0.2s both;
  }
  
  /* Page Sections */
  .page-section {
    padding: 8rem 0;
    position: relative;
  }
  
  .page-section:nth-child(even) {
    background: linear-gradient(135deg, #fafbfc 0%, #f4f6f8 100%);
  }
  
  /* Modern Cards */
  .card {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    overflow: hidden;
    position: relative;
  }
  
  .card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
  }
  
  .card:hover {
    transform: translateY(-8px);
    box-shadow: var(--box-shadow-lg);
  }
  
  .card-body {
    padding: 2rem;
  }
  
  /* Modern Buttons */
  .btn {
    border-radius: 10px;
    font-weight: 600;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    border: none;
    text-transform: none;
    letter-spacing: 0.5px;
  }
  
  .btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.6s;
  }
  
  .btn:hover::before {
    left: 100%;
  }
  
  .btn-primary {
    background: var(--gradient-primary);
    color: white;
    padding: 0.875rem 2rem;
    font-size: 1rem;
  }
  
  .btn-primary:hover {
    background: var(--gradient-primary);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
    color: white;
  }
  
  .btn-xl {
    padding: 1.25rem 3rem;
    font-size: 1.125rem;
    border-radius: 12px;
    font-weight: 700;
  }
  
  .btn-outline-primary {
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    background: transparent;
  }
  
  .btn-outline-primary:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
  }
  
  /* Form Controls */
  .form-control {
    border: 2px solid var(--gray-300);
    border-radius: 10px;
    padding: 1rem 1.25rem;
    font-size: 1rem;
    transition: var(--transition);
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
  }
  
  .form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
    transform: translateY(-1px);
    background: white;
  }      /* Dividers */
  .divider {
    max-width: 4rem;
    border-width: 3px;
    border-color: var(--primary-color);
    border-radius: 2px;
    opacity: 1;
    margin: 0 auto !important;
    display: block;
  }
  
  /* Service Icons */
  .service-icon {
    width: 4rem;
    height: 4rem;
    background: var(--gradient-primary);
    border-radius: 20px;
    display: flex !important;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
  }
  
  .service-icon i {
    color: white !important;
    font-size: 1.5rem;
    z-index: 2;
    position: relative;
  }
  
  .service-icon::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-secondary);
    opacity: 0;
    transition: var(--transition);
  }
  
  .service-icon:hover {
    transform: translateY(-8px) scale(1.05);
    box-shadow: 0 15px 35px rgba(102, 126, 234, 0.4);
  }
  
  .service-icon:hover::before {
    opacity: 1;
  }
  
  /* Modern Slider */
  .slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    max-width: 500px;
    height: 8px;
    border-radius: 50px;
    background: var(--gray-300);
    outline: none;
    transition: var(--transition);
    margin: 2rem auto;
    position: relative;
  }
  
  .slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--gradient-primary);
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
    transition: var(--transition);
    border: 3px solid white;
  }
  
  .slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 6px 25px rgba(102, 126, 234, 0.6);
  }
  
  /* Code Display */
  code {
    background: var(--gray-900) !important;
    color: #64f3d2 !important;
    padding: 1.5rem !important;
    border-radius: 10px !important;
    font-family: 'JetBrains Mono', 'Fira Code', 'Monaco', monospace !important;
    font-size: 0.9rem !important;
    line-height: 1.6 !important;
    position: relative;
    display: block;
    word-break: break-all;
  }
  
  /* QR Code */
  #qrcodeweb {
    background: white;
    padding: 2rem;
    border-radius: 20px;
    box-shadow: var(--box-shadow);
    display: inline-block;
    transition: var(--transition);
  }
  
  #qrcodeweb:hover {
    transform: scale(1.05);
    box-shadow: var(--box-shadow-lg);
  }
  
  /* Footer */
  footer {
    background: var(--gradient-dark) !important;
    color: var(--light-color) !important;
    position: relative;
    overflow: hidden;
  }
  
  footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"><polygon fill="rgba(255,255,255,0.02)" points="0,0 1000,1000 0,1000"/></svg>');
    pointer-events: none;
  }
  
  footer a, footer .text-muted {
    color: var(--light-color) !important;
    opacity: 0.8;
    transition: var(--transition);
  }
  
  footer a:hover {
    opacity: 1;
    text-decoration: none;
    transform: translateX(5px);
  }
  
  /* Tracking Results */
  .tracking-result {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05), rgba(118, 75, 162, 0.05));
    padding: 2rem;
    border-radius: var(--border-radius);
    border: 2px solid rgba(102, 126, 234, 0.1);
    position: relative;
    overflow: hidden;
  }
  
  .tracking-result::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--gradient-primary);
  }
  
  .highlight {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1), rgba(118, 75, 162, 0.1));
    padding: 0.5rem 1rem;
    border-radius: 8px;
    color: var(--primary-color);
    font-weight: 600;
    border: 1px solid rgba(102, 126, 234, 0.2);
  }
  
  /* Animations */
  @keyframes slideInUp {
    from {
      opacity: 0;
      transform: translateY(30px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
  
  @keyframes fadeInScale {
    from {
      opacity: 0;
      transform: scale(0.9);
    }
    to {
      opacity: 1;
      transform: scale(1);
    }
  }
  
  @keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
  }
    /* Responsive Design */
  @media (max-width: 768px) {
    .masthead h1 {
      font-size: 2.5rem;
    }
    
    .page-section {
      padding: 4rem 0;
    }
    
    .btn-xl {
      padding: 1rem 2rem;
      font-size: 1rem;
    }
    
    .card-body {
      padding: 1.5rem;
    }
    
    .divider {
      max-width: 3rem;
      border-width: 2px;
      margin: 1rem auto !important;
    }
  }
    @media (max-width: 576px) {
    .masthead h1 {
      font-size: 2rem;
    }
    
    .masthead p {
      font-size: 1.1rem;
    }
    
    .btn-xl {
      width: 100%;
    }
    
    .divider {
      max-width: 2.5rem;
      border-width: 2px;
      margin: 0.75rem auto !important;
    }
  }
  
  /* Loading Animation */
  .loading {
    animation: pulse 2s infinite;
  }
  
  /* Glassmorphism Effect */
  .glass {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
  }
  
  /* Gradient Text */
  .gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
  }
  
  /* Scroll Behavior */
  html {
    scroll-behavior: smooth;
  }
  
  /* Custom Scrollbar */
  ::-webkit-scrollbar {
    width: 8px;
  }
  
  ::-webkit-scrollbar-track {
    background: var(--gray-200);
  }
  
  ::-webkit-scrollbar-thumb {
    background: var(--gradient-primary);
    border-radius: 4px;
  }
  
  ::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
  }
  
  /* Simple Language Toggle Button */
#languageToggle {
  font-weight: 500;
  color: var(--gray-700) !important;
  padding: 0.5rem 1rem !important;
  border-radius: 8px;
  transition: var(--transition);
  position: relative;
  cursor: pointer;
}

#languageToggle:hover {
  color: var(--primary-color) !important;
  background: rgba(102, 126, 234, 0.1);
  transform: translateY(-1px);
}

#languageToggle:focus {
  outline: none;
  box-shadow: 0 0 0 2px rgba(102, 126, 234, 0.2);
}

/* Language transition effects */
.translating {
  opacity: 0.7;
  transition: opacity 0.3s ease;
}

.translated {
  opacity: 1;
  transition: opacity 0.3s ease;
}

/* Enhanced Language Selector Styles */
.language-selector {
  position: relative;
}

.language-toggle {
  font-weight: 600 !important;
  color: #2c3e50 !important;
  padding: 0.75rem 1.25rem !important;
  border-radius: 25px !important;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1) !important;
  cursor: pointer !important;
  display: flex !important;
  align-items: center !important;
  gap: 0.75rem !important;
  background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%) !important;
  border: 2px solid rgba(102, 126, 234, 0.1) !important;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08) !important;
  text-decoration: none !important;
  position: relative !important;
  overflow: hidden !important;
}

.language-toggle::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.6), transparent);
  transition: left 0.5s;
}

.language-toggle:hover::before {
  left: 100%;
}

.language-toggle:hover {
  color: #ffffff !important;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%) !important;
  border-color: rgba(102, 126, 234, 0.3) !important;
  transform: translateY(-2px) scale(1.02) !important;
  box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3) !important;
  cursor: pointer !important;
}

.language-toggle:focus {
  outline: none !important;
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.4) !important;
  cursor: pointer !important;
}

.language-toggle:active {
  transform: translateY(0) scale(0.98) !important;
  cursor: pointer !important;
}

.flag-icon {
  font-size: 1.25rem;
  filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.1));
  transition: transform 0.3s ease;
}

.language-toggle:hover .flag-icon {
  transform: scale(1.1);
}

.lang-name {
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.025em;
}

.language-toggle .fas.fa-chevron-down {
  font-size: 0.8rem;
  transition: transform 0.3s ease;
  opacity: 0.7;
}

.language-toggle:hover .fas.fa-chevron-down {
  transform: rotate(180deg);
  opacity: 1;
}

/* Enhanced Language Dropdown */
.language-dropdown {
  position: absolute;
  top: calc(100% + 0.5rem);
  right: 0;
  background: #ffffff;
  border-radius: 16px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
  border: 1px solid rgba(0, 0, 0, 0.08);
  min-width: 200px;
  z-index: 1000;
  overflow: hidden;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  opacity: 0;
  transform: translateY(-10px) scale(0.95);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  pointer-events: none;
}

.language-dropdown.show {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: all;
}

.language-option {
  display: flex;
  align-items: center;
  padding: 1rem 1.25rem;
  cursor: pointer !important;
  transition: all 0.2s ease;
  gap: 1rem;
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  position: relative;
  overflow: hidden;
}

.language-option::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(102, 126, 234, 0.1), transparent);
  transition: left 0.3s;
}

.language-option:hover::before {
  left: 100%;
}

.language-option:last-child {
  border-bottom: none;
}

.language-option:hover {
  background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
  color: #667eea;
  cursor: pointer !important;
  transform: translateX(4px);
}

.language-option.active {
  background: linear-gradient(135deg, rgba(102, 126, 234, 0.15) 0%, rgba(118, 75, 162, 0.15) 100%);
  color: #667eea;
  font-weight: 700;
  cursor: pointer !important;
}

.language-option .flag-icon {
  font-size: 1.3rem;
  filter: drop-shadow(0 1px 3px rgba(0, 0, 0, 0.1));
}

.language-option .lang-name {
  flex: 1;
  font-size: 0.95rem;
  font-weight: 500;
}

.language-option .fas.fa-check {
  color: #10b981;
  font-size: 0.9rem;
  filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.1));
}

/* Responsive adjustments */
@media (max-width: 991px) {
  .language-dropdown {
    right: auto;
    left: 0;
  }
  
  .language-toggle {
    padding: 0.6rem 1rem !important;
  }
  
  .lang-name {
    font-size: 0.9rem;
  }
}

@media (max-width: 576px) {
  .language-toggle {
    padding: 0.5rem 0.75rem !important;
    border-radius: 20px !important;
  }
  
  .flag-icon {
    font-size: 1.1rem;
  }
  
  .lang-name {
    font-size: 0.85rem;
  }
}

/* Animation for dropdown toggle */
@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(-10px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes slideOut {
  from {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
  to {
    opacity: 0;
    transform: translateY(-10px) scale(0.95);
  }
}