:where([class^="ri-"])::before {
            content: "\f3c2";
        }

        .gradient-bg {
            background: linear-gradient(135deg, #000000 0%, #1a1a1a 25%, #2d2d2d 50%, #1a1a1a 75%, #000000 100%);
        }

        .book-shadow {
            box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.8), 0 0 0 1px rgba(212, 175, 55, 0.3);
        }

        .circuit-pattern {
            background-image: radial-gradient(circle at 20% 50%, rgba(212, 175, 55, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 80% 20%, rgba(212, 175, 55, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 40% 80%, rgba(212, 175, 55, 0.1) 0%, transparent 50%);
        }

        .playfair {
            font-family: 'Playfair Display', serif;
        }