/* Custom Responsive Styles */
    body {
      min-height: 100vh;
      display: flex;
      flex-direction: column;
    }


    header {
      background: white;
      padding: 25px;
      border-radius: 15px;
      box-shadow: 0 10px 30px rgba(0,0,0,0.2);
      margin-bottom: 30px;
      text-align: center;
    }

    .navbar {
      padding: 1rem 0;
    }

    .navbar-toggler {
      border: 2px solid #645526;
      padding: 0.5rem 0.75rem;
    }

    .navbar-toggler:focus {
      box-shadow: 0 0 0 0.25rem rgba(102, 126, 234, 0.25);
    }


    .nav-link {
      font-weight: 500;
      padding: 0.5rem 1rem !important;
      margin: 0.25rem 0.5rem;
      border-radius: 8px;
      transition: all 0.3s ease;
      color: #495057 !important;
    }

    .nav-link:hover {
      background: #645526 !important;
      color: white !important;
      transform: translateY(-2px);
      box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
    }

    .nav-link.active {
      background: linear-gradient(135deg, #8e92a5, #645526) !important;
      color: white !important;
      box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
    }

    main {
      flex: 1;
      padding: 2rem 0;
      width: 100%;
    }

    .container-fluid {
      max-width: 1400px;
    }

    /* Mobile Optimizations */
    @media (max-width: 991.98px) {
      .navbar-collapse {
        background: white;
        padding: 1rem;
        border-radius: 10px;
        margin-top: 1rem;
        box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
      }

      .nav-link {
        margin: 0.5rem 0;
        text-align: center;
      }

      main {
        padding: 1rem 0;
      }
    }

    @media (max-width: 575.98px) {
      .navbar-brand {
        font-size: 1rem;
      }

      .nav-link {
        font-size: 0.95rem;
        padding: 0.6rem 1rem !important;
      }

      main {
        padding: 0.5rem 0;
      }
    }

    /* Tablet Optimizations */
    @media (min-width: 768px) and (max-width: 991.98px) {
      .navbar {
        padding: 1.25rem 0;
      }
    }

    /* Desktop Optimizations */
    @media (min-width: 1200px) {
      main {
        padding: 2.5rem 0;
      }
    }