:root {
            --primary-blue: #0056b3;
            --secondary-blue: #eef5ff;
            --accent-green: #28a745;
            --text-dark: #333;
            --text-light: #666;
            --white: #ffffff;
            --transition: all 0.3s ease;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Poppins', sans-serif;
        }

        html { scroll-behavior: smooth; }

        body { color: var(--text-dark); line-height: 1.6; }

        /* --- Header --- */
        header {
            background: var(--white);
            padding: 1rem 5%;
            display: flex;
            justify-content: space-between;
            align-items: center;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }

        .logo { font-size: 1.5rem; font-weight: 700; color: var(--primary-blue); }

        nav ul { display: flex; list-style: none; gap: 20px; }
        nav ul li a { text-decoration: none; color: var(--text-dark); font-weight: 500; transition: var(--transition); }
        nav ul li a:hover { color: var(--primary-blue); }

        .btn-book {
            background: var(--primary-blue);
            color: var(--white);
            padding: 10px 20px;
            border-radius: 5px;
            text-decoration: none;
            transition: var(--transition);
        }
        .btn-book:hover { background: #003d80; transform: translateY(-2px); }

        /* --- Hero Section --- */
        .hero {
            height: 80vh;
            background: linear-gradient(rgba(0,0,0,0.5), rgba(0,0,0,0.5)), url('../img/hero.webp');
            background-size: cover;
            background-position: center;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            text-align: center;
            color: var(--white);
            padding: 0 20px;
        }

        .hero h1 { font-size: 3.5rem; margin-bottom: 1rem; }
        .hero p { font-size: 1.2rem; max-width: 700px; margin-bottom: 2rem; }
        .hero-btns { display: flex; gap: 15px; }

        .btn-secondary { background: var(--white); color: var(--primary-blue); padding: 12px 25px; border-radius: 5px; text-decoration: none; }

        /* --- Section Styling --- */
        section { padding: 80px 10%; }
        .section-title { text-align: center; margin-bottom: 50px; font-size: 2.5rem; position: relative; }
        .section-title::after { content: ''; width: 60px; height: 3px; background: var(--primary-blue); position: absolute; bottom: -10px; left: 50%; transform: translateX(-50%); }

        /* --- About Section --- */
        .about-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 30px; }
        .about-card { padding: 30px; background: var(--secondary-blue); border-radius: 10px; text-align: center; }
        .about-card i { font-size: 2.5rem; color: var(--primary-blue); margin-bottom: 15px; }

        /* --- Services --- */
        .services-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 20px; }
        .service-card { 
            padding: 25px; 
            border: 1px solid #eee; 
            border-radius: 10px; 
            transition: var(--transition);
            text-align: center;
        }
        .service-card:hover { box-shadow: 0 10px 20px rgba(0,0,0,0.1); transform: translateY(-5px); border-color: var(--primary-blue); }
        .service-card i { font-size: 2rem; color: var(--primary-blue); margin-bottom: 15px; }

        /* --- Health Plans --- */
        .plans-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 30px; }
        .plan-card { 
            background: #fff; 
            border: 2px solid var(--secondary-blue); 
            padding: 40px 20px; 
            border-radius: 15px; 
            text-align: center;
            transition: var(--transition);
        }
        .plan-card.featured { border-color: var(--primary-blue); transform: scale(1.05); }

        /* --- Contact Form --- */
        .appointment-container { max-width: 800px; margin: 0 auto; background: var(--secondary-blue); padding: 40px; border-radius: 15px; }
        .form-group { margin-bottom: 15px; }
        .form-group label { display: block; margin-bottom: 5px; }
        .form-group input, .form-group select { width: 100%; padding: 12px; border: 1px solid #ddd; border-radius: 5px; }
        .btn-submit { width: 100%; padding: 15px; background: var(--primary-blue); color: white; border: none; border-radius: 5px; cursor: pointer; font-size: 1rem; }
        #form-message { display: none; margin-top: 15px; padding: 10px; background: var(--accent-green); color: white; border-radius: 5px; text-align: center; }

        /* --- Popups --- */
        .modal { 
            display: none; 
            position: fixed; 
            z-index: 2000; 
            top: 0; left: 0; 
            width: 100%; height: 100%; 
            background: rgba(0,0,0,0.6); 
            justify-content: center; 
            align-items: center; 
        }
        .modal-content { background: white; padding: 30px; border-radius: 10px; max-width: 500px; width: 90%; position: relative; }
        .close-modal { position: absolute; top: 10px; right: 15px; font-size: 1.5rem; cursor: pointer; }

        /* --- Footer --- */
        footer { background: #222; color: white; padding: 50px 10%; text-align: center; }
        .footer-links { margin-bottom: 20px; }
        .footer-links a { color: #ccc; margin: 0 10px; text-decoration: none; }
        .social-icons i { font-size: 1.5rem; margin: 0 10px; cursor: pointer; transition: var(--transition); }
        .social-icons i:hover { color: var(--primary-blue); }

        /* Responsive */
        @media (max-width: 768px) {
            nav ul { display: none; }
            .hero h1 { font-size: 2.2rem; }
        }