:root{
  --bg:#f6f7fb;
  --card:#ffffff;
  --ink:#121826;
  --muted:#5b6472;
  --brand:#2c5aa0;
  --accent:#ffcc66;
  --border:#e6e8ef;
}
*{box-sizing:border-box}
body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;background:var(--bg);color:var(--ink)}
.r40-header{background:linear-gradient(90deg,var(--brand),#1f3f70);color:#fff;padding:14px 14px 10px}
.r40-header__inner{display:flex;gap:14px;align-items:center;justify-content:space-between;flex-wrap:wrap}
.r40-logo{height:56px;width:auto;display:block}
.r40-player{min-width:280px;max-width:520px;flex:1}
.r40-player audio{width:100%}
.r40-nowplaying{margin-top:6px;font-weight:600;color:var(--accent)}
.r40-top,.r40-bottom{padding:10px 14px}
.r40-layout{display:grid;grid-template-columns:320px 1fr;gap:14px;padding:0 14px 14px}
.r40-sidebar,.r40-content{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:14px;min-height:240px}
.r40-footer{background:#0f1b2f;color:#cfd6e4;padding:16px;text-align:center}
@media (max-width: 980px){
  .r40-layout{grid-template-columns:1fr}
  .r40-player{max-width:unset}
}