*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial}
.layout{display:flex;min-height:100vh;background:#f8fafc}
.sidebar{width:220px;background:#1e293b;color:#f1f5f9;padding:12px;position:sticky;top:0;height:100vh}
.sidebar h1{font-size:18px;margin:8px 0 16px 0}
.sidebar a{display:block;color:#cbd5e1;text-decoration:none;padding:8px;border-radius:6px;margin-bottom:6px}
.sidebar a:hover,.sidebar a.active{background:#0f172a;color:#fff}
.content{flex:1;padding:20px}
header{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px}
.card{background:#fff;border:1px solid #e2e8f0;border-radius:10px;padding:16px;margin-bottom:16px}
label{display:block;margin:8px 0}input,select,textarea{width:100%;padding:8px;border:1px solid #cbd5e1;border-radius:6px}
button{padding:8px 12px;border:1px solid #334155;border-radius:6px;background:#e2e8f0;cursor:pointer}
pre{white-space:pre-wrap;background:#0b1220;color:#e2e8f0;padding:12px;border-radius:8px;overflow:auto}
@media(max-width:860px){.sidebar{position:fixed;width:100%;height:auto}.content{padding-top:90px}}