:root{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;line-height:1.6;color:#e0e0e0;background:#0a0a0f}*{box-sizing:border-box;margin:0;padding:0}body{min-height:100vh;overflow-x:hidden;background:linear-gradient(135deg,#0a0a0f,#1a0a2e,#0a0a0f)}#app{display:flex;flex-direction:column;min-height:100vh}h1{text-align:center;padding:1.75rem 2rem;margin:0;color:#fff;background:#0f0f19d9;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);box-shadow:0 2px #8a2be2cc;font-weight:700;letter-spacing:2px;font-size:1.5rem;text-shadow:0 0 20px rgba(138,43,226,.5);text-transform:uppercase}.sidebar{width:100%;background:#0f0f19e6;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);padding:0;border-bottom:2px solid rgba(138,43,226,.4)}.sidebar-header{display:flex;justify-content:space-between;align-items:center;padding:1.5rem;border-bottom:1px solid rgba(138,43,226,.2);background:#0a0a0f80}.sidebar h2{font-size:.85rem;margin:0;color:#9d7bd8;font-weight:700;text-transform:uppercase;letter-spacing:2px}#go-start-btn{background:linear-gradient(135deg,#8a2be2,#5d1b99);color:#fff;border:2px solid rgba(157,78,221,.5);padding:.6rem 1.5rem;font-size:.8rem;font-weight:700;cursor:pointer;transition:all .2s ease;box-shadow:0 4px #5d1b99,0 6px 15px #8a2be266;letter-spacing:1px;text-transform:uppercase;position:relative}#go-start-btn:hover{transform:translateY(-2px);box-shadow:0 6px #5d1b99,0 8px 20px #8a2be299;border-color:#9d4edd}#go-start-btn:active{transform:translateY(2px);box-shadow:0 2px #5d1b99,0 4px 10px #8a2be24d}.video-list{display:flex;flex-direction:column;gap:0;padding:1.5rem}.video-item{padding:1.25rem 1.5rem;background:linear-gradient(90deg,#1a1a2e,#16162a);border:none;border-left:4px solid rgba(138,43,226,.3);border-bottom:1px solid rgba(138,43,226,.1);cursor:pointer;transition:all .2s ease;font-size:.95rem;color:#c4b5d8;box-shadow:inset 0 0 0 1px #8a2be21a;position:relative;margin-bottom:.5rem}.video-item:before{content:"";position:absolute;left:0;top:0;height:100%;width:0;background:#8a2be21a;transition:width .2s ease}.video-item:hover{background:linear-gradient(90deg,#1f1f38,#1a1a30);border-left-color:#8a2be2;border-left-width:6px;transform:translate(8px);box-shadow:4px 4px #8a2be233;color:#e0d5f0}.video-item:hover:before{width:100%}.video-item.active{background:linear-gradient(90deg,#8a2be2,#7b2cbf);color:#fff;border-left-color:#fff;border-left-width:6px;box-shadow:6px 6px #8a2be266;font-weight:600}.loading{color:#7b68a6;font-style:italic;padding:1.5rem;text-align:center}.error{color:#ff6b9d;padding:1rem 1.5rem;background:#8b000033;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-left:4px solid #ff6b9d;font-weight:500;box-shadow:0 4px 15px #0006}.main-content{flex:1;padding:2rem;display:flex;justify-content:center;align-items:center;background:radial-gradient(ellipse at center,rgba(138,43,226,.05) 0%,transparent 70%)}.video-container{width:100%;max-width:1100px;aspect-ratio:16 / 9;background:#000;overflow:hidden;box-shadow:0 0 0 2px #8a2be266,8px 8px #8a2be233,0 20px 60px #0009;transition:all .3s ease}.video-container:hover{transform:translate(-4px,-4px);box-shadow:0 0 0 2px #8a2be299,12px 12px #8a2be24d,0 30px 80px #000000b3}#video-player{width:100%;height:100%;display:block;object-fit:contain}@media(min-width:768px){#app{flex-direction:row}h1{position:absolute;top:0;left:0;right:0;z-index:10}.sidebar{width:340px;min-height:100vh;border-right:2px solid rgba(138,43,226,.4);border-bottom:none;margin-top:80px;overflow-y:auto}.sidebar::-webkit-scrollbar{width:12px}.sidebar::-webkit-scrollbar-track{background:#0a0a0fcc}.sidebar::-webkit-scrollbar-thumb{background:linear-gradient(180deg,#8a2be2,#5d1b99);border:2px solid rgba(10,10,15,.8)}.sidebar::-webkit-scrollbar-thumb:hover{background:linear-gradient(180deg,#9d4edd,#7b2cbf)}.main-content{flex:1;margin-top:80px}}