:root {
            --parchment: #f9f6f0;
            --ink: #2c241d;
            --seal-red: #8b1a1a;
        }
        body {
            background: #e3d9cc;
            font-family: 'Georgia', serif;
            line-height: 1.7;
            padding: 2rem;
        }
        .parchment-container {
            max-width: 760px;
            margin: 2rem auto;
            background: var(--parchment);
            padding: 3rem 4rem;
            position: relative;
            border: 1px solid #d0c4b5;
            box-shadow: 0 4px 20px rgba(0,0,0,0.08);
        }
        .wax-seal {
            position: absolute;
            top: -25px;
            right: -20px;
            background: var(--seal-red);
            color: white;
            padding: 12px 25px;
            transform: rotate(5deg);
            border-radius: 50px;
            font-family: 'Times New Roman', serif;
            font-size: 0.9em;
        }
        .letter-header {
            border-bottom: 3px double var(--ink);
            padding-bottom: 1rem;
            margin-bottom: 2rem;
        }
        .product-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 2rem;
            margin: 2.5rem 0;
        }
        .spec-card {
            background: #fffcf8;
            padding: 1.8rem;
            border: 1px solid #ddd6cc;
            position: relative;
        }
        .spec-card::after {
            content: '';
            position: absolute;
            bottom: -8px;
            right: -8px;
            width: 100%;
            height: 100%;
            border: 1px solid #ddd6cc;
            z-index: -1;
        }
        .event-banner {
            background: var(--ink);
            color: white;
            padding: 2rem;
            margin: 3rem 0;
            text-align: center;
            border-radius: 3px;
        }
        @media (max-width: 768px) {
            .parchment-container {
                padding: 2rem;
                margin: 1rem;
            }
            .wax-seal {
                position: static;
                transform: none;
                margin: 1rem auto;
                display: table;
            }
        }