:root{--bg:#0d1117;--panel:#161b22;--panel2:#1c232c;--border:#2a323d;--text:#e6edf3;--muted:#8b949e;--accent:#2f81f7;--live:#2ea043;--error:#f85149}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg);color:var(--text);height:100vh;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;overflow:hidden}#root{flex-direction:column;height:100vh;display:flex}@media (width<=700px){body,#root{height:auto;overflow:auto}}.sidebar{border-right:1px solid var(--border);background:var(--panel);overflow-y:auto}.group-header{letter-spacing:.8px;text-transform:uppercase;color:var(--muted);border-bottom:1px solid var(--border);background:var(--panel);z-index:1;padding:8px 12px 4px;font-size:10px;font-weight:700;position:sticky;top:0}.ch-row{cursor:pointer;border-bottom:1px solid var(--border);align-items:center;gap:11px;padding:10px 14px;transition:background .1s;display:flex}.ch-row:hover{background:var(--panel2)}.ch-row.active{background:var(--panel2);border-left:3px solid var(--accent);padding-left:11px}.ch-logo{color:#fff;border-radius:5px;flex-shrink:0;justify-content:center;align-items:center;width:44px;height:28px;font-size:10px;font-weight:700;display:flex;overflow:hidden}.ch-logo img{object-fit:contain;width:100%;height:100%}.ch-info{min-width:0}.ch-name{white-space:nowrap;text-overflow:ellipsis;font-size:13px;font-weight:600;overflow:hidden}.ch-sub{color:var(--muted);align-items:center;gap:5px;margin-top:2px;font-size:11px;display:flex}.badge-live{color:var(--live);border:1px solid var(--live);border-radius:3px;padding:0 4px;font-size:9px;font-weight:700}.sidebar-empty{color:var(--muted);padding:24px 14px;font-size:13px}.player-pane{flex-direction:column;gap:14px;padding:20px;display:flex;overflow:auto}.video-wrap{aspect-ratio:16/9;border:1px solid var(--border);background:#000;border-radius:10px;width:100%;position:relative;overflow:hidden}.video{width:100%;height:100%;display:block}.placeholder{color:var(--muted);text-align:center;flex-direction:column;justify-content:center;align-items:center;gap:12px;padding:20px;font-size:14px;display:flex;position:absolute;inset:0}.placeholder-icon{font-size:42px}.quality-row{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.quality-label{color:var(--muted);font-size:12px}.q-btn{background:var(--panel);border:1px solid var(--border);color:var(--text);cursor:pointer;border-radius:6px;padding:5px 12px;font-size:12px;transition:border-color .12s,background .12s}.q-btn:hover{border-color:var(--accent)}.q-btn.active{background:var(--accent);border-color:var(--accent);color:#fff}.player-msg{color:var(--muted);font-size:13px}.player-msg.err{color:var(--error)}.app{flex-direction:column;height:100vh;display:flex}.header{border-bottom:1px solid var(--border);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);z-index:10;background:#0d1117e6;flex-shrink:0;align-items:center;gap:12px;padding:14px 20px;display:flex}.title{letter-spacing:.3px;white-space:nowrap;font-size:17px;font-weight:600}.title span{color:var(--accent)}.live-dot{background:var(--live);width:7px;height:7px;box-shadow:0 0 6px var(--live);border-radius:50%;flex-shrink:0;animation:1.8s ease-in-out infinite pulse}@keyframes pulse{0%,to{opacity:1}50%{opacity:.4}}.now-playing{white-space:nowrap;text-overflow:ellipsis;flex:1;font-size:13px;font-weight:600;overflow:hidden}.status{color:var(--muted);white-space:nowrap;flex-shrink:0;font-size:12px}.layout{flex:1;grid-template-columns:260px 1fr;min-height:0;display:grid}@media (width<=700px){.app{height:auto}.layout{grid-template-columns:1fr}}