:root{
  --bg:#f0f2f5; --card:#fff; --text:#111; --muted:#667; --primary:#2271b1; --sidebar:#1d2327; --sidebar-text:#c3c4c7;
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Ubuntu,"Helvetica Neue",Arial}
a{text-decoration:none}
.layout{display:grid;grid-template-columns:240px 1fr;min-height:100vh}
.sidebar{background:var(--sidebar);color:var(--sidebar-text);padding:16px 0}
.sidebar .brand{color:#fff;font-weight:700;font-size:18px;padding:0 16px;margin-bottom:8px}
.nav a{display:flex;align-items:center;color:var(--sidebar-text);padding:10px 16px;border-left:3px solid transparent}
.nav a:hover{color:#fff;background:#2c3338}
.nav a.active{color:#fff;border-left-color:var(--primary);background:#2c3338}
.topbar{display:flex;align-items:center;justify-content:space-between;background:#fff;padding:10px 16px;border-bottom:1px solid #e5e7eb;position:sticky;top:0;z-index:20}
.content{padding:20px}
.card{background:var(--card);border:1px solid #e5e7eb;border-radius:10px}
.card .card-header{padding:14px 16px;border-bottom:1px solid #e5e7eb;font-weight:600}
.card .card-body{padding:16px}
.table{width:100%;border-collapse:collapse}
.table th,.table td{border-bottom:1px solid #eee;padding:10px;text-align:left}
.badge{display:inline-block;padding:2px 8px;border-radius:999px;background:#eef2ff;color:#3730a3;font-size:12px}
.btn{display:inline-flex;align-items:center;gap:6px;border:1px solid #e5e7eb;border-radius:8px;background:#fff;padding:8px 12px;cursor:pointer}
.btn-primary{background:var(--primary);border-color:var(--primary);color:#fff}
.btn-danger{background:#dc2626;border-color:#dc2626;color:#fff}
.btn-outline{background:#fff}
.input, .select{width:100%;padding:8px 10px;border:1px solid #e5e7eb;border-radius:8px}
.grid{display:grid;gap:16px}
.grid.two{grid-template-columns:1fr 1fr}
.grid.three{grid-template-columns:1fr 1fr 1fr}
.mt-2{margin-top:8px}.mt-3{margin-top:12px}.mb-2{margin-bottom:8px}.mb-3{margin-bottom:12px}
.flex{display:flex;gap:10px;align-items:center}.right{margin-left:auto}.text-right{text-align:right}
small.muted{color:var(--muted)}
.alert{padding:10px 12px;border-radius:8px;border:1px solid #e5e7eb;background:#f8fafc}
footer{padding:20px;color:#94a3b8}