:root{--bg:#0b1220;--card:#0f172a;--text:#e2e8f0;--muted:#94a3b8;--accent:#14b8a6;--danger:#ef4444;--ok:#22c55e;}
*{box-sizing:border-box}html,body{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:Inter,system-ui,Segoe UI,Roboto,Ubuntu,"Helvetica Neue",Arial}
a{color:#8ab4f8;text-decoration:none}a:hover{text-decoration:underline}
.container{max-width:1200px;margin:24px auto;padding:0 16px}
nav{background:rgba(255,255,255,.04);border-bottom:1px solid rgba(255,255,255,.08);padding:12px 16px;display:flex;gap:16px;align-items:center}
nav a.logo{font-weight:700;color:#fff}
.sidebar{width:240px;flex:0 0 240px;border-right:1px solid rgba(255,255,255,.08);padding:16px;position:sticky;top:0;height:100dvh;background:rgba(255,255,255,.02)}
.sidebar ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:8px}
.sidebar li a{display:block;padding:10px 12px;border-radius:10px;background:rgba(255,255,255,.03);border:1px solid transparent}
.sidebar li a:hover{border-color:rgba(255,255,255,.1)}
.layout{display:flex;gap:16px}
.card{background:var(--card);border:1px solid rgba(255,255,255,.06);border-radius:14px;padding:16px;margin-bottom:18px}
h1,h2{margin:.3em 0}
table{width:100%;border-collapse:collapse;border-radius:12px;overflow:hidden}
th,td{border-bottom:1px solid rgba(255,255,255,.06);padding:10px;text-align:left}
input[type=text],input[type=email],input[type=url],input[type=number],input[type=password],textarea,select{width:100%;padding:10px;background:#0b1020;border:1px solid rgba(255,255,255,.08);color:#e2e8f0;border-radius:10px}
input[type=file]{color:#94a3b8}
.btn{padding:10px 14px;border-radius:10px;border:0;cursor:pointer}
.btn-primary{background:var(--accent);color:#001314}
.btn-danger{background:var(--danger);color:#fff}
.btn-success{background:var(--ok);color:#001314}
.btn-small{padding:6px 10px;font-size:12px}
.form-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:12px}
.form-actions .btn{flex:1 1 160px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:16px}
.muted{color:var(--muted);font-size:12px}
.badge{display:inline-block;padding:3px 8px;border-radius:999px;background:rgba(255,255,255,.08);font-size:12px}
.alert{padding:10px 12px;border-radius:10px;background:rgba(20,184,166,.12);border:1px solid rgba(20,184,166,.3);margin-bottom:12px}
.err{background:rgba(239,68,68,.12);border-color:rgba(239,68,68,.3)}
.topbar{display:flex;align-items:center;justify-content:space-between}
@media (max-width:980px){
  .layout{flex-direction:column}
  .sidebar{position:relative;width:100%;flex:auto;height:auto;border-right:none;border-bottom:1px solid rgba(255,255,255,.08);margin-bottom:16px}
  .sidebar ul{flex-direction:row;flex-wrap:wrap;gap:6px}
  .sidebar li a{flex:1 1 calc(50% - 6px);text-align:center}
}
@media (max-width:600px){
  nav{flex-direction:column;align-items:flex-start}
  .sidebar li a{flex:1 1 100%}
  .grid{grid-template-columns:1fr}
}