body{margin:0;background:#0f1720;color:#fff;font-family:Arial}
.layout{display:flex;min-height:100vh}
.sidebar{width:220px;background:#111827;padding:16px}
.brand{font-weight:800;margin-bottom:12px}
.nav{display:flex;flex-direction:column;gap:8px}
.nav-item{color:#fff;text-decoration:none;padding:10px;border-radius:10px;background:rgba(255,255,255,.04)}
.nav-item.active{outline:1px solid rgba(77,163,255,.7);background:rgba(77,163,255,.12)}
.main{flex:1;padding:16px}
.card{background:#1b2735;border-radius:14px;padding:14px;margin-bottom:14px}
input,textarea{width:100%;padding:10px;margin:8px 0;border-radius:10px;border:1px solid #2a3b52;background:#0b1220;color:#fff}
button{padding:10px 14px;border:0;border-radius:10px;background:#4da3ff;color:#fff}
.item{padding:10px;border-radius:12px;background:rgba(255,255,255,.03);margin:10px 0}
.muted{color:#aab6c6}
pre{white-space:pre-wrap;background:#0b1220;padding:10px;border-radius:10px;border:1px solid #2a3b52}