*{box-sizing:border-box;margin:0;padding:0}body{color:#fff;background:#0a0a0a;height:100vh;font-family:sans-serif;overflow:hidden}.app{flex-direction:column;height:100vh;display:flex}.video-section{background:#000;flex-direction:column;flex:none;align-items:center;display:flex}.controls{background:#222;justify-content:center;gap:20px;width:100%;padding:10px;display:flex}.controls button{color:#fff;cursor:pointer;background:0 0;border:none;padding:0 10px;font-size:1.5rem}.chat-section{background:#1a1a1a;border-top:1px solid #333;flex-direction:column;flex:1;display:flex;overflow:hidden}.chat-box{flex-direction:column;height:100%;display:flex}.messages{flex:1;padding:10px;overflow-y:auto}.message{border-bottom:1px solid #333;padding:4px 0}.input-area{background:#222;padding:8px;display:flex}.input-area input{color:#fff;background:#333;border:none;border-radius:20px;flex:1;margin-right:8px;padding:8px}.input-area button{color:#fff;cursor:pointer;background:#08c;border:none;border-radius:20px;padding:0 16px}