/* ============================================================
   ADMIN - khu vuc quan tri
   ============================================================ */
.admin-layout{display:flex;min-height:100vh}
.admin-sidebar{width:220px;background:#1e2433;display:flex;flex-direction:column;flex-shrink:0}
.admin-sidebar .logo{padding:18px 16px;font-size:15px;font-weight:800;color:white;border-bottom:1px solid rgba(255,255,255,.08)}
.admin-nav a{display:flex;align-items:center;gap:10px;padding:12px 16px;color:rgba(255,255,255,.65);font-size:13px;transition:all .15s;border-left:3px solid transparent}
.admin-nav a:hover,.admin-nav a.active{background:rgba(255,255,255,.08);color:white;border-left-color:var(--red)}
.admin-main{flex:1;display:flex;flex-direction:column;background:#f4f5f7;overflow-x:hidden}
.admin-topbar{background:white;padding:14px 20px;border-bottom:1px solid #e8eaed;display:flex;align-items:center;justify-content:space-between;gap:12px}
.admin-content{padding:18px 20px;flex:1}
.data-table{width:100%;border-collapse:collapse;background:white;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.data-table th{background:#f8f9fb;padding:11px 14px;font-size:11px;font-weight:700;color:#6b7280;text-align:left;border-bottom:1px solid #e8eaed;text-transform:uppercase;letter-spacing:.4px}
.data-table td{padding:12px 14px;font-size:13px;border-bottom:1px solid #f5f5f5;vertical-align:middle}
.data-table tr:last-child td{border-bottom:none}
.data-table tr:hover td{background:#fafbfc}
.btn-primary{background:var(--red);color:white;border:none;border-radius:8px;padding:9px 18px;font-size:13px;font-weight:700;cursor:pointer;font-family:inherit;transition:background .2s}
.btn-primary:hover{background:var(--red-dark)}
.btn-sm{display:inline-flex;align-items:center;gap:4px;padding:5px 11px;border-radius:6px;font-size:12px;font-weight:700;cursor:pointer;border:none;font-family:inherit;text-decoration:none;transition:all .15s}
.btn-edit{background:#e3f2fd;color:#1565c0}.btn-edit:hover{background:#bbdefb}
.btn-delete{background:#ffebee;color:#e23744}.btn-delete:hover{background:#ffcdd2}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:20px}
.stat-box{background:white;border-radius:10px;padding:18px;box-shadow:var(--shadow);display:flex;align-items:center;gap:14px}
.stat-icon{font-size:32px}
.stat-val{font-size:22px;font-weight:800;color:var(--dark)}
.stat-lbl{font-size:12px;color:#9ca3af;margin-top:2px}