/* Enhanced header styles */
    .topbar {
      background: linear-gradient(135deg, #0d1520 0%, #0b0f14 100%);
      border-bottom: 1px solid #1e293b;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
      position: sticky;
      top: 0;
      z-index: 100;
      backdrop-filter: blur(10px);
    }

    .topbar .container {
      padding: 0.75rem 0;
    }

    .logo a {
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      padding: 0.5rem 0;
      font-weight: 700;
      font-size: 1.25rem;
      letter-spacing: 0.5px;
      color: #e2ecf5;
      transition: all 0.2s ease;
      text-decoration: none;
    }

    .logo a::before {
      content: '';
      display: inline-block;
      width: 2rem;
      height: 2rem;
      background: linear-gradient(135deg, var(--accent) 0%, #2563eb 100%);
      border-radius: 8px;
      box-shadow: 0 2px 8px rgba(59, 130, 246, 0.3);
      transition: all 0.2s ease;
    }

    .logo a:hover::before {
      transform: rotate(5deg) scale(1.05);
      box-shadow: 0 4px 12px rgba(59, 130, 246, 0.4);
    }

    .logo a:hover {
      color: #fff;
    }

    /* Navigation styles */
    nav {
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }

    nav a {
      position: relative;
      padding: 0.6rem 1rem;
      color: #94a3b8;
      text-decoration: none;
      font-weight: 500;
      font-size: 0.95rem;
      border-radius: 10px;
      transition: all 0.2s ease;
      white-space: nowrap;
    }

    nav a::before {
      content: '';
      position: absolute;
      bottom: 0.25rem;
      left: 50%;
      transform: translateX(-50%) scaleX(0);
      width: 80%;
      height: 2px;
      background: var(--accent);
      border-radius: 2px;
      transition: transform 0.2s ease;
    }

    nav a:hover {
      color: var(--text);
      background: rgba(59, 130, 246, 0.1);
    }

    nav a:hover::before {
      transform: translateX(-50%) scaleX(1);
    }

    nav a.active {
      color: var(--text);
      background: rgba(59, 130, 246, 0.15);
    }

    nav a.active::before {
      transform: translateX(-50%) scaleX(1);
    }

    /* User menu styling */
    nav a[href="logout.php"] {
      color: var(--muted);
      border: 1px solid #1f2a3a;
      padding: 0.5rem 0.9rem;
      margin-left: 0.5rem;
    }

    nav a[href="logout.php"]:hover {
      color: var(--danger);
      background: rgba(239, 68, 68, 0.1);
      border-color: var(--danger);
    }

    nav a[href="logout.php"]::before {
      display: none;
    }

    /* Mobile menu toggle */
    .mobile-menu-toggle {
      display: none;
      background: transparent;
      border: 1px solid #1f2a3a;
      color: var(--text);
      padding: 0.5rem;
      border-radius: 8px;
      cursor: pointer;
      font-size: 1.25rem;
      transition: all 0.2s ease;
      width: auto;
    }

    .mobile-menu-toggle:hover {
      background: rgba(59, 130, 246, 0.1);
      border-color: var(--accent);
    }

    /* Responsive navigation */
    @media (max-width: 768px) {
      .topbar .container {
        position: relative;
      }

      .mobile-menu-toggle {
        display: block;
      }

      nav {
        position: absolute;
        top: 100%;
        right: 0;
        left: 0;
        flex-direction: column;
        background: #0d1520;
        border: 1px solid #1f2a3a;
        border-top: none;
        border-radius: 0 0 14px 14px;
        padding: 1rem;
        gap: 0.5rem;
        box-shadow: 0 8px 16px rgba(0, 0, 0, 0.3);
        display: none;
        animation: slideDown 0.3s ease-out;
      }

      @keyframes slideDown {
        from {
          opacity: 0;
          transform: translateY(-10px);
        }

        to {
          opacity: 1;
          transform: translateY(0);
        }
      }

      nav.open {
        display: flex;
      }

      nav a {
        width: 100%;
        text-align: left;
        padding: 0.75rem 1rem;
      }

      nav a[href="logout.php"] {
        margin-left: 0;
        margin-top: 0.5rem;
        border-top: 1px solid #1f2a3a;
        padding-top: 1rem;
      }
    }

    /* Icon additions for nav items */
    nav a[href="dashboard.php"]::after {
      content: '\f3fd';
      font-family: 'Font Awesome 6 Free';
      font-weight: 900;
      margin-left: 0.5rem;
      font-size: 0.85rem;
      opacity: 0.6;
    }

    nav a[href="forms.php"]::after {
      content: '\f15c';
      font-family: 'Font Awesome 6 Free';
      font-weight: 900;
      margin-left: 0.5rem;
      font-size: 0.85rem;
      opacity: 0.6;
    }

    nav a[href="profile.php"]::after {
      content: '\f007';
      font-family: 'Font Awesome 6 Free';
      font-weight: 900;
      margin-left: 0.5rem;
      font-size: 0.85rem;
      opacity: 0.6;
    }

    nav a[href="logout.php"]::after {
      content: '\f2f5';
      font-family: 'Font Awesome 6 Free';
      font-weight: 900;
      margin-left: 0.5rem;
      font-size: 0.85rem;
      opacity: 0.6;
    }

    nav a[href="login.php"]::after {
      content: '\f2f6';
      font-family: 'Font Awesome 6 Free';
      font-weight: 900;
      margin-left: 0.5rem;
      font-size: 0.85rem;
      opacity: 0.6;
    }

    nav a[href="register.php"]::after {
      content: '\f234';
      font-family: 'Font Awesome 6 Free';
      font-weight: 900;
      margin-left: 0.5rem;
      font-size: 0.85rem;
      opacity: 0.6;
    }

    /* Smooth scroll behavior */
    html {
      scroll-behavior: smooth;
    }

    /* Page transition effect */
    main {
      animation: fadeIn 0.4s ease-out;
    }

    @keyframes fadeIn {
      from {
        opacity: 0;
        transform: translateY(10px);
      }

      to {
        opacity: 1;
        transform: translateY(0);
      }
    }