*{box-sizing:border-box}body{margin:0;background:#101722;color:#e8eef7;font:16px/1.6 system-ui,sans-serif}header{display:flex;justify-content:space-between;padding:20px 5%;background:#182435}main{display:grid;grid-template-columns:minmax(0,3fr) minmax(260px,1fr);gap:24px;max-width:1400px;margin:auto;padding:24px}section,aside{min-width:0}h1{font-size:28px;margin:0}h2{font-size:18px}#count,#tip{color:#aebfd4}#stage{background:#05090e;border-radius:16px;overflow:hidden}video{width:100%;max-height:65vh;background:#000}#tracks{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:6px}#tracks video{max-height:45vh}input,button{font:inherit;border-radius:8px;padding:10px 12px;margin:5px 3px;border:1px solid #43546a}input{background:#1b293b;color:white;max-width:100%}button{background:#2878dd;color:white;cursor:pointer}button:disabled{opacity:.5;cursor:wait}aside,#admin{background:#182435;border-radius:12px;padding:18px}#messages{height:50vh;overflow:auto;overflow-wrap:anywhere}#messages p{border-bottom:1px solid #2c394a;padding:8px 0;margin:0}#chat{display:flex}#chat input{min-width:0;flex:1}[hidden]{display:none!important}#history button{background:#263c59}@media(max-width:760px){main{grid-template-columns:1fr;padding:14px}#messages{height:240px}header{padding:14px}h1{font-size:23px}}