:root {
            --primary-color: #2c3e50;
            --secondary-color: #e74c3c;
            --accent-color: #3498db;
            --light-color: #ecf0f1;
            --dark-color: #2c3e50;
        }
        
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        .navbar {
            background-color: #fff;
        }
		.nav-item a{color:#000;}
		.nav-item a:hover{color:#888c91;}
		.navbar-nav .nav-link.active, .navbar-nav .nav-link.show{color:#000;}
        
        .navbar-brand {
            font-weight: 700;
        }
		.sticky-top{box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);}
		.navbar-toggler-icon{background-image: url('../images/toggle-bar-icon.png');}
        
        /* Hero Slider Styles */
        .hero-slider {
            position: relative;
            height: 500px;
            overflow: hidden;
        }
        
        .slide {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-size: cover;
            background-position: center;
            opacity: 0;
            transition: opacity 1s ease-in-out;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            color: white;
            background-color: rgba(0, 0, 0, 0.6);
            background-blend-mode: overlay;
        }
        
        .slide.active {
            opacity: 1;
        }
        
        .slide-content {
            max-width: 800px;
            padding: 0 20px;
        }
        
        .slide h1 {
            font-size: 2.5rem;
            margin-bottom: 20px;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
        }
        
        .slide p {
            font-size: 1.2rem;
            margin-bottom: 30px;
            text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
        }
        
        .slide-1 {
            background-image: url('../images/mathsworld-banner1.jpg');
        }
        
        .slide-2 {
            background-image: url('../images/mathsworld-banner2.jpg');
        }
        
        .slide-3 {
            background-image: url('../images/mathsworld-banner3.jpg');
        }
        
        .slider-controls {
            position: absolute;
            bottom: 20px;
            left: 50%;
            transform: translateX(-50%);
            display: flex;
            z-index: 10;
        }
        
        .slider-control {
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background-color: rgba(255, 255, 255, 0.5);
            margin: 0 5px;
            cursor: pointer;
            transition: background-color 0.3s;
        }
        
        .slider-control.active {
            background-color: white;
        }
        
        /* WhatsApp Button Styles */
        .whatsapp-button {
            position: fixed;
            bottom: 30px;
            right: 30px;
            background-color: #25D366;
            color: white;
            width: 60px;
            height: 60px;
            border-radius: 50%;
            text-align: center;
            font-size: 30px;
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
            z-index: 100;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.3s;
        }
        
        .whatsapp-button:hover {
            background-color: #128C7E;
            transform: scale(1.1);
            color: white;
        }
        
        .whatsapp-chat {
            position: fixed;
            bottom: 100px;
            right: 30px;
            width: 300px;
            background-color: white;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
            z-index: 101;
            display: none;
            overflow: hidden;
        }
        
        .whatsapp-header {
            background-color: #075E54;
            color: white;
            padding: 15px;
            display: flex;
            align-items: center;
        }
        
        .whatsapp-header i {
            margin-right: 10px;
            font-size: 20px;
        }
        
        .whatsapp-body {
            padding: 15px;
            height: 300px;
            overflow-y: auto;
        }
        
        .whatsapp-message {
            margin-bottom: 15px;
            padding: 10px;
            border-radius: 5px;
            max-width: 80%;
        }
        
        .received {
            background-color: #ECE5DD;
            margin-right: auto;
        }
        
        .sent {
            background-color: #DCF8C6;
            margin-left: auto;
        }
        
        .whatsapp-input {
            display: flex;
            padding: 10px;
            border-top: 1px solid #ddd;
        }
        
        .whatsapp-input input {
            flex: 1;
            padding: 8px;
            border: 1px solid #ddd;
            border-radius: 20px;
            outline: none;
        }
        
        .whatsapp-input button {
            background-color: #075E54;
            color: white;
            border: none;
            border-radius: 50%;
            width: 40px;
            height: 40px;
            margin-left: 10px;
            cursor: pointer;
        }
        
        .btn-primary {
            background-color: var(--secondary-color);
            border-color: var(--secondary-color);
        }
        
        .btn-primary:hover {
            background-color: #c0392b;
            border-color: #c0392b;
        }
        
        .feature-icon {
            font-size: 2.5rem;
            color: var(--secondary-color);
            margin-bottom: 1rem;
        }
        
        .testimonial-card {
            border-left: 4px solid var(--secondary-color);
        }
        
        .pricing-card {
            transition: transform 0.3s;
            border: none;
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
        }
        
        .pricing-card:hover {
            transform: translateY(-10px);
        }
        
        .pricing-header {
            background-color: var(--primary-color);
            color: white;
        }
        
        .popular-plan {
            border: 2px solid var(--secondary-color);
        }
        
        footer {
            background-color: var(--primary-color);
            color: white;
        }
        
        .social-icon {
            color: white;
            font-size: 1.5rem;
            margin: 0 10px;
        }
        
        .section-title {
            position: relative;
            margin-bottom: 3rem;
        }
        
        .section-title:after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 3px;
            background-color: var(--secondary-color);
        }