@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@300;400;500;600;700;800;900&display=swap');

        :root {
            --primary: #1e3a2f; 
            --primary-dark: #13251e;
            --accent: #005baa; 
            --bg-light: #f4f7f6;
            --white: #ffffff;
            --text-dark: #111827;
            --text-muted: #4b5563;
            --success: #28a745;
        }

        body {
            font-family: 'Montserrat', sans-serif;
            margin: 0;
            padding: 0;
            background-color: var(--bg-light);
            color: var(--text-dark);
            overflow-x: hidden;
        }

        /* PROMO BAR */
        .promo-bar {
            background: var(--accent);
            color: var(--white);
            text-align: center;
            padding: 12px 10px;
            font-size: 13px;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        /* HEADER */
        header {
            background: var(--white);
            padding: 20px;
            text-align: center;
            box-shadow: 0 2px 15px rgba(0,0,0,0.05);
            font-weight: 900;
            font-size: 22px;
            letter-spacing: 1px;
            color: var(--primary);
            text-transform: uppercase;
        }
        header span { color: var(--accent); }

        /* HERO SECTION */
        .hero-container {
            max-width: 1100px;
            margin: 30px auto;
            padding: 0 20px;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .hero-media {
            background: var(--white);
            border-radius: 20px;
            padding: 15px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.04);
            text-align: center;
            position: relative;
        }

        .hero-media img {
            max-width: 100%;
            border-radius: 15px;
            display: block;
            margin: 0 auto;
        }

        .badge-hot {
            position: absolute;
            top: 20px;
            left: 20px;
            background: var(--accent);
            color: var(--white);
            padding: 6px 14px;
            border-radius: 30px;
            font-weight: 700;
            font-size: 12px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .hero-info h1 {
            font-size: 36px;
            font-weight: 900;
            margin: 0 0 15px 0;
            line-height: 1.2;
            color: var(--primary);
        }

        .tagline {
            color: var(--accent);
            font-weight: 800;
            text-transform: uppercase;
            font-size: 13px;
            letter-spacing: 2px;
            margin-bottom: 10px;
            display: block;
        }

        .price-box {
            display: flex;
            align-items: center;
            gap: 15px;
            margin: 20px 0;
            background: #fff;
            padding: 15px 25px;
            border-radius: 12px;
            box-shadow: 0 4px 15px rgba(0,0,0,0.02);
            width: fit-content;
        }

        .old-price {
            font-size: 18px;
            color: #a0a0a0;
            text-decoration: line-through;
            font-weight: 600;
        }

        .new-price {
            font-size: 32px;
            color: var(--accent);
            font-weight: 900;
        }

        .shipping-info {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 25px;
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 600;
        }

        /* CTA BUTTON */
        .cta-btn {
            background: var(--primary);
            color: var(--white);
            border: none;
            padding: 20px 40px;
            font-size: 18px;
            font-weight: 800;
            border-radius: 12px;
            cursor: pointer;
            transition: all 0.3s ease;
            width: 100%;
            text-transform: uppercase;
            letter-spacing: 1px;
            box-shadow: 0 8px 25px rgba(30, 58, 47, 0.25);
        }

        .cta-btn:hover {
            background: var(--primary-dark);
            transform: translateY(-3px);
        }

        /* BULLETS */
        .features-list {
            margin-top: 30px;
            padding: 0;
            list-style: none;
        }

        .features-list li {
            font-size: 15px;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 12px;
            color: var(--text-dark);
            font-weight: 500;
        }

        .features-list li::before {
            content: "✓";
            color: var(--success);
            font-weight: 900;
            font-size: 18px;
        }

        /* DETAILS / DEEP DIVE SECTION */
        .details-section {
            background: var(--white);
            padding: 60px 20px;
            margin-top: 50px;
            border-top: 1px solid #e5e7eb;
        }

        .details-grid {
            max-width: 1100px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: 0.91fr 1.1fr;
            gap: 50px;
            align-items: center;
        }

        .details-text h2 {
            font-size: 32px;
            font-weight: 900;
            margin-bottom: 20px;
            color: var(--primary);
            line-height: 1.2;
        }

        .details-text p {
            color: var(--text-muted);
            line-height: 1.7;
            font-size: 16px;
            margin-bottom: 20px;
            font-weight: 500;
        }

        .details-image-wrap {
            text-align: center;
        }
        
        .details-image-wrap img {
            width: 100%;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.05);
        }

        /* VALUE CARDS */
        .why-we-need-box {
            max-width: 1100px;
            margin: 60px auto;
            padding: 0 20px;
        }
        .why-we-need-box h2 {
            font-size: 30px;
            font-weight: 900;
            text-align: center;
            color: var(--primary);
            margin-bottom: 40px;
        }
        .grid-benefits {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 25px;
        }
        .benefit-item {
            background: var(--white);
            padding: 30px;
            border-radius: 16px;
            box-shadow: 0 8px 25px rgba(0,0,0,0.02);
            border-left: 4px solid var(--primary);
        }
        .benefit-item h3 {
            font-size: 18px;
            font-weight: 800;
            margin: 0 0 12px 0;
            color: var(--primary);
        }
        .benefit-item p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
            margin: 0;
            font-weight: 500;
        }

        /* DIMENSIONS SECTION */
        .specs-section {
            max-width: 700px;
            margin: 50px auto 0 auto;
            padding: 0 20px;
            text-align: center;
        }
        .specs-section h3 {
            font-size: 24px;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 15px;
        }
        .specs-section img {
            max-width: 100%;
            border-radius: 15px;
            box-shadow: 0 5px 25px rgba(0,0,0,0.04);
        }

        /* CHECKOUT SECTION */
        .checkout-section {
            max-width: 600px;
            margin: 40px auto 60px auto;
            padding: 0 20px;
            scroll-margin-top: 40px;
        }

        .checkout-box {
            background: var(--white);
            padding: 40px;
            border-radius: 20px;
            box-shadow: 0 15px 40px rgba(0,0,0,0.06);
            border: 2px solid var(--primary);
        }

        .checkout-box h2 {
            margin: 0 0 10px 0;
            font-size: 26px;
            font-weight: 900;
            text-align: center;
            color: var(--primary);
        }

        .checkout-box p {
            text-align: center;
            color: var(--text-muted);
            font-size: 14px;
            margin-bottom: 30px;
            font-weight: 600;
        }

        .form-group {
            margin-bottom: 20px;
        }

        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 700;
            font-size: 14px;
            color: var(--primary);
        }

        .form-group input, .form-group select {
            width: 100%;
            padding: 16px;
            background: var(--bg-light);
            border: 1px solid #e5e7eb;
            color: var(--text-dark);
            border-radius: 10px;
            box-sizing: border-box;
            font-family: inherit;
            font-size: 15px;
            transition: 0.3s;
            font-weight: 600;
        }

        .form-group input:focus {
            outline: none;
            border-color: var(--primary);
            background: var(--white);
            box-shadow: 0 0 10px rgba(30, 58, 47, 0.1);
        }

        .order-summary {
            background: var(--bg-light);
            padding: 20px;
            border-radius: 10px;
            margin-bottom: 30px;
            font-size: 14px;
        }

        .summary-row {
            display: flex;
            justify-content: space-between;
            margin-bottom: 12px;
            color: var(--text-muted);
            font-weight: 600;
        }

        .summary-row.total {
            margin-bottom: 0;
            padding-top: 15px;
            border-top: 1px dashed #ced4da;
            font-size: 19px;
            font-weight: 900;
            color: var(--text-dark);
        }

        .payment-tag {
            text-align: center;
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 15px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 5px;
        }

        /* FOOTER */
        footer {
            text-align: center;
            padding: 40px 20px;
            background: var(--primary);
            color: rgba(255,255,255,0.6);
            font-size: 13px;
            font-weight: 600;
        }

        @media (max-width: 768px) {
            .hero-container {
                grid-template-columns: 1fr;
                gap: 25px;
                margin: 15px auto;
            }

            .hero-info h1 {
                font-size: 28px;
            }

            .details-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }

            .checkout-box {
                padding: 25px;
            }
        }