:root {
            --primary-color: #007bff; /* Blue */
            --secondary-color: #00bfff; /* Sky Blue */
            --dark-color: #1e3a8a; /* Deep Blue/Energy color */
            --light-color: #f8f9fa;
        }

        /* 1. Popup Header Styling */
        .popup-header {
            max-width: 1300px; /* Constrain width */
            margin: 0 auto; /* Center it */
            padding: 1rem 1.5rem;
            border-radius: 0 0 15px 15px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            background-color: white;
            position: relative;
            z-index: 1000; /* Ensure it floats above content */
        }
        
        /* Mobile specific header layout: Logo Left, Call Us Button Right, Toggler for menu */
        @media (max-width: 991.98px) {
            .navbar-brand {
                margin-right: auto;
            }
            .nav-call-btn {
                order: 3; /* Move button to the right of the toggler */
            }
            .navbar-toggler {
                margin-left: 1rem;
            }
            .header-content-wrapper {
                 /* This wrapper handles the logo, call btn and toggler */
                 display: flex;
                 align-items: center;
                 justify-content: space-between;
            }
        }
        
        /* Desktop Nav Alignment: Center the nav menu */
        @media (min-width: 992px) {
            .navbar-nav {
                flex-direction: row;
                justify-content: center;
                width: 100%;
                margin-left: -150px; /* Offset the logo/button width to truly center the nav links */
            }
            .nav-item {
                margin: 0 1rem;
            }
        }

        /* 2. Custom Button Styling */
        .btn-primary, .btn-primary:hover, .btn-primary:active, .btn-primary:focus {
            background-color: var(--primary-color) !important;
            border-color: var(--primary-color) !important;
            transition: background-color 0.3s ease, transform 0.3s ease;
            box-shadow: 0 4px 8px rgba(0, 123, 255, 0.3);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            background-color: var(--dark-color) !important;
        }

        /* 3. Features Card Hover Effect */
        .feature-card {
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            border: none;
            border-radius: 12px;
            overflow: hidden;
        }
        .feature-card:hover {
            transform: translateY(-10px) scale(1.02);
            box-shadow: 0 15px 30px rgba(0, 123, 255, 0.2);
            border-color: var(--secondary-color) !important;
        }
        .feature-icon {
            color: var(--primary-color);
            font-size: 3rem;
            margin-bottom: 1rem;
        }

        /* 4. Section Styling */
        .section-padding {
            padding: 5rem 0;
        }
        .bg-light-blue {
            background-color: #e3f2fd; /* Very light blue */
        }

        /* 5. How It Works - Step Circle */
        .step-circle {
            width: 60px;
            height: 60px;
            background-color: var(--primary-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            margin: 0 auto 1rem;
            box-shadow: 0 4px 8px rgba(0, 123, 255, 0.4);
        }
        
        /* 6. Footer Styling */
        footer {
            background-color: var(--dark-color);
            color: var(--light-color);
        }