:root {
    --primary-color: #00bcd4;
    --secondary-color: #007c91;
    --dark-color: #111;
    --light-color: #f8f9fa;
    --overlay-color: rgba(0, 0, 0, 0.8);
  }
  
  body {
    margin: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--dark-color);
    color: var(--light-color);
    line-height: 1.6;
    padding-top: 70px;
  }

  /* Navbar Styles */
  .navbar {
    background: linear-gradient(135deg, #000 0%, #001f24 100%);
    border-bottom: 1px solid var(--secondary-color);
    padding: 0.5rem 1rem;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
  }

  .navbar-brand {
    display: flex;
    align-items: center;
    padding: 0;
  }

  .navbar-brand img {
    height: 35px;
    width: auto;
    margin-right: 10px;
  }

  .nav-link {
    color: #aaa;
    font-weight: 500;
    padding: 0.5rem 1rem;
    transition: all 0.3s ease;
    position: relative;
  }

  .nav-link:hover,
  .nav-link:focus {
    color: var(--primary-color);
  }

  .nav-link.active {
    color: var(--primary-color);
  }

  .nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 1rem;
    right: 1rem;
    height: 2px;
    background-color: var(--primary-color);
  }

  .dropdown-menu {
    background-color: #001f24;
    border: 1px solid var(--secondary-color);
  }

  .dropdown-item {
    color: #aaa;
    padding: 0.5rem 1rem;
  }

  .dropdown-item:hover {
    background-color: rgba(0, 188, 212, 0.1);
    color: var(--primary-color);
  }

  .dropdown-divider {
    border-color: var(--secondary-color);
  }

  .navbar-toggler {
    border-color: var(--primary-color);
  }

  .navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%280, 188, 212, 1%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
  }

  /* Navbar Center Alignment */
  .navbar-collapse {
    justify-content: space-between;
  }

  /* Login Button Styles */
  .btn-login {
    border: 1.5px solid var(--primary-color) !important;
    border-radius: 50px !important;
    margin-left: 0.5rem;
    padding: 0.375rem 1.25rem !important;
    transition: all 0.3s ease;
  }

  .btn-login:hover,
  .btn-login:focus,
  .btn-login.active {
    background-color: var(--primary-color) !important;
    color: var(--dark-color) !important;
    box-shadow: 0 0 10px rgba(0, 188, 212, 0.5);
  }

  /* Remove the underline effect for the login button */
  .btn-login.active::after {
    display: none !important;
  }

  /* History Section */
  .history-section {
    padding: 4rem 0;
  }

  .section-title {
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
  }

  .section-title h2 {
    font-size: 2.2rem;
    color: var(--primary-color);
    font-weight: 600;
    display: inline-block;
    padding-bottom: 10px;
  }

  .section-title h2::after {
    content: "";
    position: absolute;
    width: 80px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
  }

  /* Bridge Cards */
  .bridge-card {
    display: flex;
    background-color: #1a1a1a;
    border-radius: 8px;
    overflow: hidden;
    margin-bottom: 3rem;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
  }

  .bridge-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 25px rgba(0, 188, 212, 0.2);
  }

  .bridge-image {
    flex: 1;
    overflow: hidden;
    position: relative;
    cursor: pointer;
  }

  .bridge-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
  }

  .bridge-card:hover .bridge-image img {
    transform: scale(1.03);
  }

  .bridge-info {
    flex: 1;
    padding: 2rem;
  }

  .bridge-info h3 {
    color: var(--primary-color);
    font-size: 1.8rem;
    margin-bottom: 1rem;
  }

  .bridge-stats {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
  }

  .bridge-stats span {
    display: flex;
    align-items: center;
    gap: 0.5rem;
  }

  .bridge-info p {
    margin-bottom: 2rem;
    line-height: 1.7;
    color: #ccc;
  }

  .btn {
    background-color: var(--primary-color);
    color: var(--dark-color);
    border: none;
    padding: 0.8rem 1.5rem;
    border-radius: 4px;
    cursor: pointer;
    font-weight: bold;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
  }

  .btn:hover {
    background-color: #008c9e;
    transform: translateY(-2px);
  }

  /* History Content */
  .history-content {
    background-color: #1a1a1a;
    padding: 2rem;
    border-radius: 8px;
    margin-bottom: 3rem;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  }

  .history-content h3 {
    color: var(--primary-color);
    font-size: 1.5rem;
    margin: 1.5rem 0 1rem;
  }

  .history-content p {
    margin-bottom: 1rem;
    line-height: 1.7;
    color: #ccc;
  }

  .history-content ul {
    margin-left: 2rem;
    margin-bottom: 1.5rem;
  }

  .history-content li {
    margin-bottom: 0.5rem;
    color: #ccc;
  }

  /* Download Buttons */
  .download-options {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin: 2rem 0;
  }

  .download-btn {
    background-color: var(--primary-color);
    color: var(--dark-color);
    border: none;
    padding: 0.8rem 1.5rem;
    border-radius: 4px;
    cursor: pointer;
    font-weight: bold;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
  }

  .download-btn:hover {
    background-color: #008c9e;
    transform: translateY(-2px);
  }

  /* Modal Styles */
  .modal-content {
    background-color: var(--dark-color);
    border: 1px solid var(--primary-color);
  }

  .modal-header {
    border-bottom: 1px solid var(--secondary-color);
  }

  .modal-title {
    color: var(--primary-color);
    font-weight: 600;
  }

  .modal-body {
    padding: 2rem;
  }

  #modalImage {
    max-height: 60vh;
    width: auto;
    max-width: 100%;
    margin: 0 auto;
    display: block;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
  }

  #modalDescription {
    color: #aaa;
  }

  .modal-section {
    margin-top: 1.5rem;
    padding: 0 1rem;
  }

  .modal-section h6 {
    color: var(--primary-color);
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    border-bottom: 1px solid var(--secondary-color);
    padding-bottom: 0.3rem;
  }

  .modal-section p {
    color: #eee;
    font-size: 1rem;
    line-height: 1.7;
  }

  .modal-footer {
    border-top: 1px solid var(--secondary-color);
  }

  .btn-close {
    filter: invert(1);
  }

/* Footer Styles */
footer {
    background: linear-gradient(135deg, #000 0%, #001f24 100%);
    padding: 3rem 1rem 1.5rem;
    color: #aaa;
    border-top: 1px solid var(--secondary-color);
    font-size: 0.95rem;
  }
  
  .footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto 2rem;
  }
  
  .footer-col h4 {
    color: var(--primary-color);
    margin-bottom: 1.2rem;
    font-size: 1.1rem;
    font-weight: 600;
  }
  
  .footer-about {
    margin-bottom: 1.5rem;
    line-height: 1.6;
  }
  
  .footer-links {
    list-style: none;
    padding: 0;
  }
  
  .footer-links li {
    margin-bottom: 0.7rem;
  }
  
  .footer-links a {
    color: #aaa;
    text-decoration: none;
    transition: color 0.3s ease;
  }
  
  .footer-links a:hover {
    color: var(--primary-color);
  }
  
  .social-links {
      margin: 1.5rem 0;
    }
  
    .social-links a {
      color: #aaa;
      font-size: 1.5rem;
      margin: 0.75rem;
      transition: color 0.3s ease;
      margin-left: 1px;
    }
  
    .social-links a:hover {
      color: var(--primary-color);
    }
  
  .footer-contact p {
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
  }
  
  .footer-contact i {
    width: 20px;
    text-align: center;
  }
  
  .footer-legal {
    margin-top: 1.5rem;
    font-size: 0.85rem;
  }
  
  @media (max-width: 768px) {
    .footer-grid {
      grid-template-columns: 1fr;
      gap: 1.5rem;
    }
    
    .footer-col {
      margin-bottom: 1rem;
    }
    
    .footer-col h4 {
      margin-bottom: 1rem;
    }
  }
  

  /* Responsive Design */
  @media (max-width: 768px) {
    body {
      padding-top: 60px;
    }
    
    .bridge-card {
      flex-direction: column;
    }
    
    .section-title h2 {
      font-size: 1.8rem;
    }
    
    .history-content {
      padding: 1.5rem;
    }
    
    .download-options {
      flex-direction: column;
      align-items: center;
    }
    
    .navbar-collapse {
      background: linear-gradient(135deg, #000 0%, #001f24 100%);
      padding: 1rem;
      margin-top: 0.5rem;
      border-radius: 5px;
      box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
    }
  }

  @media (max-width: 480px) {
    .section-title h2 {
      font-size: 1.5rem;
    }
    
    .bridge-info h3 {
      font-size: 1.5rem;
    }
    
    .history-content h3 {
      font-size: 1.3rem;
    }
  }