:root{
  --brand:#6d28d9;
  --brand-soft:rgba(109,40,217,.10);
  --ink:#1f2933;
  --muted:#697586;
  --line:#e6e8ec;
  --bg:#f6f7f9;
  --card:#ffffff;
  --radius:14px;
}
*{box-sizing:border-box}
body{background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;}

/* ---------- shell ---------- */
.app-shell{display:flex;min-height:100vh;}
.sidebar{
  width:248px;flex:0 0 248px;background:#fff;border-right:1px solid var(--line);
  display:flex;flex-direction:column;position:fixed;top:0;bottom:0;left:0;z-index:40;
}
.brand{display:flex;align-items:center;gap:10px;padding:20px 20px 16px;font-weight:800;letter-spacing:.3px;font-size:15px;}
.brand-dot{width:26px;height:26px;border-radius:8px;background:linear-gradient(135deg,var(--brand),#a855f7);display:inline-block;box-shadow:0 4px 10px var(--brand-soft);}
.brand-name{white-space:nowrap;}
.brand-logo{height:28px;width:auto;max-width:150px;display:block;object-fit:contain;}
.auth-brand img{height:36px;width:auto;max-width:200px;object-fit:contain;}
.sidebar .nav{padding:8px 12px;gap:2px;}
.sidebar .nav-link{
  display:flex;align-items:center;gap:12px;color:var(--muted);border-radius:10px;
  padding:10px 12px;font-weight:500;font-size:14.5px;transition:.12s;
}
.sidebar .nav-link i{font-size:17px;width:20px;text-align:center;}
.sidebar .nav-link:hover{background:#f3f4f6;color:var(--ink);}
.sidebar .nav-link.active{background:var(--brand-soft);color:var(--brand);font-weight:600;}
.sidebar-foot{margin-top:auto;padding:12px;border-top:1px solid var(--line);}
.sidebar-foot .nav-link{display:flex;align-items:center;gap:12px;color:var(--muted);border-radius:10px;padding:10px 12px;}
.sidebar-foot .nav-link:hover{background:#f3f4f6;color:#b91c1c;}

.main{flex:1;margin-left:248px;min-width:0;display:flex;flex-direction:column;}
.topbar{
  height:64px;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;
  gap:16px;padding:0 26px;position:sticky;top:0;z-index:30;
}
.page-title{font-size:19px;font-weight:700;margin:0;}
.topbar-right{margin-left:auto;display:flex;align-items:center;gap:18px;}
.bell{position:relative;color:var(--muted);font-size:19px;}
.bell:hover{color:var(--brand);}
.bell-badge{position:absolute;top:-6px;right:-8px;background:#ef4444;color:#fff;font-size:10px;font-weight:700;border-radius:20px;padding:1px 5px;}
.user-chip{display:flex;align-items:center;gap:10px;}
.avatar{width:38px;height:38px;border-radius:10px;background:var(--brand);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;}
.user-meta{line-height:1.1;}
.user-name{font-weight:600;font-size:13.5px;}
.user-mail{font-size:12px;color:var(--muted);}
.content{padding:26px;max-width:1240px;width:100%;}

/* ---------- cards & bits ---------- */
.card{border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 1px 2px rgba(16,24,40,.04);}
.card-header{background:#fff;border-bottom:1px solid var(--line);font-weight:600;border-radius:var(--radius) var(--radius) 0 0!important;}
.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;margin-bottom:24px;}
.stat{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px;}
.stat .stat-label{color:var(--muted);font-size:13px;font-weight:500;display:flex;align-items:center;gap:8px;}
.stat .stat-label i{color:var(--brand);}
.stat .stat-value{font-size:28px;font-weight:800;margin-top:6px;letter-spacing:-.5px;}
.stat .stat-sub{font-size:12px;color:var(--muted);margin-top:2px;}

.table thead th{font-size:12px;text-transform:uppercase;letter-spacing:.04em;color:var(--muted);border-bottom:1px solid var(--line);font-weight:600;}
.table td{vertical-align:middle;}
.table>:not(caption)>*>*{padding:.7rem .75rem;}
.thumb{width:40px;height:40px;border-radius:8px;object-fit:cover;background:#f1f2f4;border:1px solid var(--line);}
.thumb-ph{width:40px;height:40px;border-radius:8px;background:#f1f2f4;border:1px solid var(--line);display:flex;align-items:center;justify-content:center;color:#b0b7c0;}

.btn-brand{background:var(--brand);border-color:var(--brand);color:#fff;font-weight:600;}
.btn-brand:hover{filter:brightness(.94);color:#fff;}
.btn-outline-brand{border-color:var(--brand);color:var(--brand);font-weight:600;}
.btn-outline-brand:hover{background:var(--brand);color:#fff;}
a{color:var(--brand);text-decoration:none;}
a:hover{text-decoration:underline;}

.empty{text-align:center;padding:56px 20px;color:var(--muted);}
.empty i{font-size:40px;color:#cbd2d9;display:block;margin-bottom:12px;}
.page-actions{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:18px;flex-wrap:wrap;}
.section-sub{color:var(--muted);font-size:14px;margin:-6px 0 18px;}

.notif-item{display:flex;gap:14px;padding:14px 16px;border-bottom:1px solid var(--line);}
.notif-item.unread{background:var(--brand-soft);}
.notif-ico{width:38px;height:38px;border-radius:10px;background:#f1f2f4;display:flex;align-items:center;justify-content:center;color:var(--brand);font-size:18px;flex:0 0 38px;}
.notif-body{flex:1;min-width:0;}
.notif-title{font-weight:600;}
.notif-msg{color:var(--muted);font-size:13.5px;}
.notif-time{color:#98a2b3;font-size:12px;white-space:nowrap;}

/* ---------- auth ---------- */
.auth-body{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#faf5ff,#f6f7f9);}
.auth-card{background:#fff;width:100%;max-width:410px;padding:36px 34px;border-radius:18px;box-shadow:0 20px 50px rgba(16,24,40,.10);border:1px solid var(--line);margin:20px;}
.auth-brand{display:flex;align-items:center;gap:10px;font-weight:800;margin-bottom:22px;}
.auth-title{font-size:22px;font-weight:800;margin:0 0 4px;}
.auth-sub{color:var(--muted);font-size:14px;margin-bottom:22px;}
.auth-foot{text-align:center;color:var(--muted);font-size:13px;margin-top:20px;}

/* ---------- responsive ---------- */
@media (max-width:992px){
  .sidebar{transform:translateX(-100%);transition:.2s;}
  .sidebar.open{transform:none;}
  .main{margin-left:0;}
}