.book-box-glow { filter: drop-shadow(0 0 25px rgba(0, 0, 0, 0.15)); transition: all 0.4s ease; }
        .book-box-glow:hover { transform: translateY(-5px); filter: drop-shadow(0 0 35px rgba(0, 0, 0, 0.25)); }
        .accent-border { border-left: 5px solid #1a1a1a; }
        .video-wrapper { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; border-radius: 1rem; }
        .video-wrapper iframe { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }