:root {
            --yellow: #FFD400;
            --black: #000000;
            --white: #FFFFFF;
            --gray: #f8f8f8;
            --font-main: "Josefin Slab", serif;
            --transition: all 0.5s cubic-bezier(0.19, 1, 0.22, 1);
        }

        /* --- BASE RESET --- */
        * { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body { 
            font-family: var(--font-main); 
            background: var(--white); 
            color: var(--black);
            overflow-x: hidden;
            line-height: 1.6;
        }

        h1, h2, h3, h4 { font-weight: 700; text-transform: uppercase; letter-spacing: -1px; }

        .page { display: none; min-height: 100vh; animation: pageFade 0.6s ease; }
        .page.active { display: block; }
        @keyframes pageFade { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

        /* --- STICKY HEADER --- */
        header {
            position: fixed; top: 0; width: 100%; padding: 30px 8%;
            display: flex; justify-content: space-between; align-items: center;
            z-index: 1000; transition: var(--transition);
        }
        header.sticky { background: var(--white); padding: 15px 8%; box-shadow: 0 10px 40px rgba(0,0,0,0.15); }
        .logo { font-size: 2rem; font-weight: 800; cursor: pointer; color: var(--black); }
        .logo span { background: var(--yellow); padding: 0 8px; }

        nav ul { display: flex; list-style: none; gap: 40px; }
        nav ul li a { 
            text-decoration: none; color: var(--black); font-weight: 700; 
            font-size: 1.1rem; position: relative; transition: 0.3s;
        }
        nav ul li a:hover { color: #555; }
        nav ul li a::after {
            content: ''; position: absolute; bottom: -5px; left: 0; width: 0;
            height: 3px; background: var(--black); transition: 0.3s;
        }
        nav ul li a:hover::after { width: 100%; }

        /* --- HERO SECTION: SPLIT LAYOUT --- */
        .hero-container { position: relative; width: 100%; }
        
        .hero-top { 
            background: var(--yellow); 
            min-height: 55vh; 
            display: flex; 
            flex-direction: column; 
            align-items: center; 
            justify-content: center;
            padding: 120px 8% 100px;
            text-align: center;
        }
        .hero-top h1 { font-size: 5rem; line-height: 1; margin-bottom: 20px; min-height: 120px; }
        .hero-top p { font-size: 1.4rem; max-width: 700px; font-weight: 500; }

        .hero-slider-box {
            position: absolute;
            top: 80vh;
            left: 50%;
            transform: translate(-50%, -50%);
            z-index: 10;
            display: flex;
            align-items: center;
            gap: 20px;
        }
        .hero-img-frame {
            width: 700px; height: 500px; 
            background: var(--white);
            border: 4px solid var(--white);
            box-shadow: 0 30px 60px rgba(241, 240, 240, 0.2);
            overflow: hidden;
            position: relative;
        }
        .hero-img-frame img { width: 100%; height: 100%; object-fit: cover; transition: 0.8s; }
        .nav-btn {
            background: var(--black); color: var(--yellow);
            border: none; width: 60px; height: 60px; border-radius: 50%;
            cursor: pointer; display: flex; align-items: center; justify-content: center;
            transition: 0.3s;
        }
        .nav-btn:hover { background: #333; transform: scale(1.1); }

        .hero-bottom { 
            top:100rem;
            background: var(--white); 
            min-height: 45vh; 
            padding: 250px 8% 80px; 
            text-align: center;
        }

        /* --- ALTERNATING SECTIONS --- */
        .alt-section { padding: 100px 8%; display: flex; align-items: center; gap: 80px; }
        .alt-section.black { background: var(--black); color: var(--white); }
        .alt-section.white { background: var(--white); color: var(--black); }
        .alt-section:nth-child(even) { flex-direction: row-reverse; }
        .alt-content { flex: 1; }
        .alt-image { flex: 1; height: 500px; overflow: hidden; border-radius: 4px; }
        .alt-image img { width: 100%; height: 100%; object-fit: cover; }

        /* --- FEATURES SECTION --- */
        .features { background: var(--yellow); padding: 120px 8%; text-align: center; }
        .grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; margin-top: 60px; }
        .feature-card { 
            background: var(--white); padding: 50px; transition: var(--transition);
            text-align: left; cursor: pointer; border-bottom: 10px solid var(--black);
        }
        .feature-card:hover { 
            transform: translateY(-15px); 
            background: var(--black); 
            color: var(--white); 
            box-shadow: 0 30px 50px rgba(0,0,0,0.2);
        }
        .feature-card i { margin-bottom: 25px; display: block; }

        /* --- TESTIMONIALS --- */
        .testimonials { background: var(--white); padding: 120px 8%; text-align: center; }
        .test-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
        .test-card { 
            padding: 40px; background: var(--gray); border-radius: 20px; 
            opacity: 0; transform: translateX(-50px); transition: 0.8s;
        }
        .test-card.visible { opacity: 1; transform: translateX(0); }
        .test-img { width: 80px; height: 80px; border-radius: 50%; margin: 0 auto 20px; object-fit: cover; }

        /* --- BUTTONS --- */
        .btn {
            padding: 18px 40px; font-weight: 700; text-transform: uppercase;
            border: none; cursor: pointer; display: inline-flex; align-items: center;
            gap: 10px; transition: 0.3s; text-decoration: none; font-size: 1rem;
        }
        .btn-black { background: var(--black); color: var(--yellow); }
        .btn-black:hover { transform: translateY(-5px); box-shadow: 0 10px 20px rgba(0,0,0,0.3); }
        .btn-yellow { background: var(--yellow); color: var(--black); }
        .btn-yellow:hover { box-shadow: 0 0 20px var(--yellow); }

        /* --- MODAL --- */
        .modal { 
            position: fixed; inset: 0; background: rgba(0,0,0,0.95); 
            z-index: 2000; display: none; align-items: center; justify-content: center; padding: 20px;
        }
        .modal-content { 
            background: var(--white); width: 100%; max-width: 900px; 
            padding: 60px; position: relative; max-height: 90vh; overflow-y: auto;
        }
        .close-modal { position: absolute; top: 20px; right: 20px; cursor: pointer; }

        /* --- FOOTER --- */
        footer { background: var(--black); color: var(--white); padding: 100px 8% 40px; }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: 60px; }
        .footer-col h4 { color: var(--yellow); margin-bottom: 30px; font-size: 1.3rem; }
        .footer-col a { color: #888; text-decoration: none; display: block; margin-bottom: 15px; transition: 0.3s; }
        .footer-col a:hover { color: var(--yellow); padding-left: 8px; }
        .social-icons { display: flex; gap: 20px; margin-top: 30px; }
        .social-icons i:hover { color: var(--yellow); cursor: pointer; transform: scale(1.2); }

        /* --- FORMS --- */
        .form-group { margin-bottom: 25px; }
        input, textarea { 
            width: 100%; padding: 18px; border: 2px solid #ddd; background: #fff;
            font-family: inherit; font-size: 1rem; outline: none;
        }
        input:focus { border-color: var(--yellow); }

        /* --- TYPEWRITER --- */
        .cursor { display: inline-block; width: 5px; height: 5rem; background: var(--black); margin-left: 10px; animation: blink 0.8s infinite; vertical-align: middle; }
        @keyframes blink { 50% { opacity: 0; } }

        /* --- MOBILE --- */
        @media (max-width: 1024px) {
            .hero-top h1 { font-size: 3rem; }
            .hero-img-frame { width: 300px; height: 300px; }
            .hero-slider-box { top: 60vh; }
            .hero-bottom { padding-top: 200px; }
            .grid-3, .test-grid, .footer-grid, .alt-section { grid-template-columns: 1fr; flex-direction: column !important; }
            nav { display: none; }
        }




/* Navigation */
#mainNav ul {
    display: flex;
    gap: 25px;
    list-style: none;
}

#mainNav ul li a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
}

/* Buttons */
#bookSessionBtn {
    margin-left: 20px;
}

/* Hamburger Menu - hidden on desktop */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
}

.hamburger span {
    display: block;
    width: 25px;
    height: 3px;
    background: #333;
    border-radius: 3px;
}

/* Mobile styles */
@media (max-width: 768px) {
    #mainNav {
        position: absolute;
        top: 65px;
        left: 0;
        width: 100%;
        background: #fff;
        display: none;
        flex-direction: column;
        padding: 15px 0;
        box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    }

    #mainNav ul {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }

    .hamburger {
        display: flex;
    }

    #bookSessionBtn {
        display: none; /* hide button on mobile or move inside nav if needed */
    }

    #mainNav.active {
        display: flex;
    }
}