:root {
            --primary-blue: #0d6efd;
            --secondary-teal: #20c997;
            --dark-navy: #002b5c;
            --light-bg: #f8f9fa;
        }
        body {
            font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
            color: #333;
            overflow-x: hidden;
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--dark-navy) !important;
        }
        .nav-link {
            font-weight: 500;
            margin: 0 8px;
            transition: color 0.3s;
        }
        .nav-link:hover {
            color: var(--secondary-teal) !important;
        }
        .hero-section {
            background: linear-gradient(rgba(13, 110, 253, 0.85), rgba(32, 201, 151, 0.8)), url('https://images.unsplash.com/photo-1559757148-5c350d0d3c56?ixlib=rb-4.0.3&auto=format&fit=crop&w=2070&q=80') center/cover no-repeat;
            color: white;
            padding: 120px 0;
        }
        .section-title {
            color: var(--dark-navy);
            position: relative;
            padding-bottom: 15px;
            margin-bottom: 40px;
            font-weight: 700;
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: var(--secondary-teal);
            border-radius: 2px;
        }
        .service-card {
            border: none;
            border-radius: 15px;
            overflow: hidden;
            transition: transform 0.4s, box-shadow 0.4s;
            height: 100%;
        }
        .service-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }
        .service-icon {
            font-size: 3rem;
            color: var(--primary-blue);
            margin-bottom: 20px;
        }
        .doctor-card {
            border-radius: 15px;
            overflow: hidden;
            transition: transform 0.3s;
        }
        .doctor-card:hover {
            transform: scale(1.03);
        }
        .testimonial-card {
            background: var(--light-bg);
            border-radius: 15px;
            border-left: 5px solid var(--secondary-teal);
        }
        .btn-primary {
            background-color: var(--primary-blue);
            border: none;
            padding: 12px 30px;
            border-radius: 50px;
            font-weight: 600;
            transition: all 0.3s;
        }
        .btn-primary:hover {
            background-color: var(--dark-navy);
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        }
        .contact-info-box {
            background: white;
            border-radius: 15px;
            padding: 30px;
            box-shadow: 0 10px 20px rgba(0,0,0,0.05);
            height: 100%;
            transition: transform 0.3s;
        }
        .contact-info-box:hover {
            transform: translateY(-5px);
        }
        .footer {
            background-color: var(--dark-navy);
            color: #ddd;
        }
        .footer a {
            color: #ddd;
            text-decoration: none;
            transition: color 0.3s;
        }
        .footer a:hover {
            color: white;
        }
        .friendlink {
            background-color: rgba(255,255,255,0.05);
            border-radius: 10px;
            padding: 20px;
            margin-top: 30px;
        }
        .flink {
            display: inline-block;
            background: rgba(255,255,255,0.1);
            color: #ddd;
            padding: 8px 20px;
            margin: 5px 10px;
            border-radius: 50px;
            text-decoration: none;
            transition: all 0.3s;
        }
        .flink:hover {
            background: var(--primary-blue);
            color: white;
            transform: scale(1.05);
        }
        .sticky-top {
            top: -100px;
            transition: top 0.5s;
        }
        .sticky-top.scrolled {
            top: 0;
            box-shadow: 0 5px 20px rgba(0,0,0,0.1);
        }
        .whatsapp-float {
            position: fixed;
            width: 60px;
            height: 60px;
            bottom: 40px;
            right: 40px;
            background-color: #25d366;
            color: white;
            border-radius: 50px;
            text-align: center;
            font-size: 30px;
            box-shadow: 2px 2px 10px rgba(0,0,0,0.2);
            z-index: 1000;
            display: flex;
            align-items: center;
            justify-content: center;
            text-decoration: none;
            transition: all 0.3s;
        }
        .whatsapp-float:hover {
            background-color: #128C7E;
            transform: scale(1.1);
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 80px 0;
                text-align: center;
            }
            .section-title::after {
                left: 50%;
                transform: translateX(-50%);
            }
            .whatsapp-float {
                width: 50px;
                height: 50px;
                bottom: 20px;
                right: 20px;
                font-size: 25px;
            }
        }