/* ======================
   THEME-COMPLIANT HEADER/NAVBAR
   ====================== */
   .main-header {
    background: var(--background-color--dark);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--header-height);
    box-shadow: var(--glass-shadow);
    border-bottom: var(--glass-border);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
  }
  
  .header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
  }
  
  .logo {
    text-decoration: none;
    display: flex;
    align-items: center;
  }
  
  .logo-image {
    height: 100px;
  }

  .navbar {
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  }
  
  .nav-list {
    list-style: none;
    display: flex;
    gap: 2.5rem;
    margin: 0;
    padding: 0;
  }
  
  .nav-link {
    text-decoration: none;
    color: var(--color-white);
    text-transform: uppercase;
    font-size: 0.95rem;
    letter-spacing: 1px;
    font-weight: 600;
    position: relative;
    padding: 0.5rem 0;
    transition: all 0.3s ease;
    opacity: 0.9;
  }
  
  .nav-link:hover {
    color: var(--text-hover);
    opacity: 1;
  }
  
  /* Active tab underline animation */
  .nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 3px;
    bottom: 0;
    left: 0;
    background: var(--text-hover);
    transition: width 0.4s ease, left 0.4s ease;
  }
  
  .nav-link:hover::after,
  .nav-link.active::after {
    width: 100%;
    left: 0;
  }
  
  .nav-link.active {
    color: var(--text-hover);
    opacity: 1;
  }
  
  /* Mobile styles */
  .nav-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--color-white);
    font-size: 1.8rem;
    cursor: pointer;
    z-index: 1001;
    transition: transform 0.3s ease;
  }
  
  .nav-toggle:hover {
    transform: scale(1.1);
    color: var(--text-hover);
  }
  
  @media (max-width: 768px) {
    .header-container {
      padding: 0 1.5rem;
    }
    
    .logo-image {
      height: 60px;
    }
    
    .nav-toggle {
      display: block;
    }
    
    .navbar {
      position: fixed;
      top: var(--header-height);
      left: 0;
      right: 0;
      background: var(--footer-bg);
      backdrop-filter: var(--glass-blur);
      -webkit-backdrop-filter: var(--glass-blur);
      height: calc(100vh - var(--header-height));
      display: none;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      padding: 2rem;
      opacity: 0;
      transform: translateY(-20px);
      transition: opacity 0.4s ease, transform 0.4s ease;
    }
    
    .navbar.active {
      display: flex;
      opacity: 1;
      transform: translateY(0);
    }
    
    .nav-list {
      flex-direction: column;
      gap: 2rem;
      text-align: center;
    }
    
    .nav-link {
      font-size: 1.2rem;
      padding: 0.5rem 1rem;
    }
    
    .nav-link::after {
      height: 2px;
      bottom: 5px;
    }
  }