.youtube-grid-container{margin:0 auto;padding:20px;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}.youtube-grid-header{margin-bottom:24px}.youtube-grid-header h2{font-size:24px;font-weight:600;color:#1a1a1a;margin:0;display:flex;align-items:center;gap:8px}.youtube-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));grid-gap:20px;gap:20px;margin-top:20px}.video-card{background:#fff;border-radius:12px;overflow:hidden;cursor:pointer;transition:all .3s cubic-bezier(.4,0,.2,1);box-shadow:0 2px 8px rgba(0,0,0,.1);position:relative}.video-card:hover{transform:translateY(-4px);box-shadow:0 8px 25px rgba(0,0,0,.15)}.video-thumbnail{position:relative;width:100%;height:240px;overflow:hidden;background:#f0f0f0}.video-thumbnail img{width:100%;height:100%;object-fit:cover;transition:all .6s cubic-bezier(.4,0,.2,1);filter:grayscale(100%) contrast(1.2)}.video-card:hover .video-thumbnail img{filter:grayscale(0) contrast(1);transform:scale(1.05)}.play-button{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:60px;height:60px;background:rgba(0,0,0,.7);border-radius:50%;display:flex;align-items:center;justify-content:center;transition:all .3s ease;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.video-card:hover .play-button{background:rgba(255,0,0,.9);transform:translate(-50%,-50%) scale(1.1)}.play-button svg{margin-left:2px;transition:all .3s ease}.video-title{padding:16px;background:linear-gradient(135deg,#f8f9fa,#e9ecef);transition:all .3s ease}.video-card:hover .video-title{background:linear-gradient(135deg,#fff,#f8f9fa)}.video-title h3{font-size:14px;font-weight:600;line-height:1.4;color:#2d3748;margin:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;text-overflow:ellipsis;transition:color .3s ease}.video-card:hover .video-title h3{color:#1a202c}.error-state,.loading-state{text-align:center;padding:40px 20px;color:#666}.error-note{font-size:12px;color:#999;margin-top:8px}@media (max-width:768px){.youtube-grid{grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:16px}.youtube-grid-container{padding:16px}.youtube-grid-header h2{font-size:20px}.video-thumbnail{height:160px}}@media (max-width:480px){.youtube-grid{grid-template-columns:1fr;gap:12px}.video-thumbnail{height:200px}}@keyframes colorTransition{0%{filter:grayscale(100%) contrast(1.2)}to{filter:grayscale(0) contrast(1)}}.video-card:hover .video-thumbnail img{animation:colorTransition .6s cubic-bezier(.4,0,.2,1) forwards}.video-card:focus{outline:2px solid #4299e1;outline-offset:2px}.video-card:focus:not(:focus-visible){outline:none}