.markdown-content .video-placeholder{position:relative;width:100%;max-width:680px;margin:2.5rem auto;border-radius:.5rem;overflow:hidden;box-shadow:0 4px 6px -1px rgba(0,0,0,.1),0 2px 4px -1px rgba(0,0,0,.06);transition:transform .3s ease,box-shadow .3s ease}.markdown-content .video-placeholder:hover{transform:translateY(-2px);box-shadow:0 8px 25px -5px rgba(0,0,0,.1),0 10px 10px -5px rgba(0,0,0,.04)}.markdown-content .video-placeholder img{width:100%;height:auto;display:block;margin:0}.markdown-content .video-placeholder .play-overlay{position:absolute;top:0;left:0;right:0;bottom:0;display:flex;align-items:center;justify-content:center;background:rgba(0,0,0,.3);transition:background .3s ease}.markdown-content .video-placeholder:hover .play-overlay{background:rgba(0,0,0,.5)}.markdown-content .video-placeholder .play-button{width:80px;height:80px;background:rgba(255,255,255,.9);border-radius:50%;display:flex;align-items:center;justify-content:center;transition:all .3s ease;border:3px solid white}.markdown-content .video-placeholder:hover .play-button{background:white;transform:scale(1.1)}.markdown-content .video-placeholder .play-icon{width:0;height:0;border-left:20px solid #333;border-top:12px solid transparent;border-bottom:12px solid transparent;margin-left:4px}.markdown-content .video-link-text{display:block;text-align:center;margin-top:.5rem;font-size:14px;color:var(--color-secondary,#64748b);text-decoration:none;padding:.5rem}.dark .markdown-content .video-link-text{color:var(--color-secondary-dark,#cbd5e1)}.markdown-content .video-link-text:hover{color:var(--color-accent,#0284c7)}.dark .markdown-content .video-link-text:hover{color:var(--color-accent-dark,#38bdf8)}.dark .markdown-content .video-placeholder{box-shadow:0 4px 6px -1px rgba(0,0,0,.2),0 2px 4px -1px rgba(0,0,0,.12)}.dark .markdown-content .video-placeholder:hover{box-shadow:0 8px 25px -5px rgba(0,0,0,.3),0 10px 10px -5px rgba(0,0,0,.2)}@media (max-width:480px){.markdown-content .video-placeholder{margin:2rem auto}.markdown-content .video-placeholder .play-button{width:60px;height:60px}.markdown-content .video-placeholder .play-icon{border-left:15px solid #333;border-top:9px solid transparent;border-bottom:9px solid transparent}}