:root {
  --sf-primary: #4f46e5; --sf-primary-hover: #4338ca;
  --sf-success: #10b981; --sf-danger: #ef4444;
  --sf-warning: #f59e0b; --sf-bg: #f7f8fb; --sf-surface: #ffffff;
  --sf-surface-2: #f1f3f9; --sf-border: #e5e7eb;
  --sf-text: #111827; --sf-text-muted: #6b7280;
  --sf-shadow: 0 1px 3px rgba(0,0,0,.06);
  --sf-radius: 12px;
}
html[data-theme="dark"] {
  --sf-bg: #0f1117; --sf-surface: #161923; --sf-surface-2: #1f2430;
  --sf-border: #262b38; --sf-text: #e5e7eb; --sf-text-muted: #9ca3af;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--sf-bg); color: var(--sf-text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  font-size: 14px; line-height: 1.5; }
a { color: var(--sf-primary); text-decoration: none; }
a:hover { color: var(--sf-primary-hover); }
.auth-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center;
  padding: 20px; background: linear-gradient(135deg, #eef2ff 0%, #f7f8fb 100%); }
html[data-theme="dark"] .auth-wrap { background: linear-gradient(135deg, #0f1117 0%, #1a1f2e 100%); }
.auth-card { width: 100%; max-width: 420px; background: var(--sf-surface);
  border: 1px solid var(--sf-border); border-radius: var(--sf-radius);
  box-shadow: var(--sf-shadow); padding: 32px; }
.auth-card h1 { margin: 0 0 6px; font-size: 22px; font-weight: 700; }
.auth-card p.sub { margin: 0 0 24px; color: var(--sf-text-muted); font-size: 13px; }
.sf-layout { display: flex; min-height: 100vh; }
.sf-sidebar { width: 250px; background: var(--sf-surface); border-right: 1px solid var(--sf-border);
  display: flex; flex-direction: column; position: fixed; top: 0; bottom: 0; left: 0;
  transition: transform .25s ease; z-index: 1030; }
.sf-sidebar-brand { padding: 18px 20px; font-weight: 700; font-size: 16px;
  border-bottom: 1px solid var(--sf-border); display: flex; align-items: center; gap: 10px; }
.sf-sidebar-brand i { color: var(--sf-primary); }
.sf-nav { padding: 12px 8px; flex: 1; overflow-y: auto; }
.sf-nav a { display: flex; align-items: center; gap: 12px; padding: 10px 14px;
  color: var(--sf-text); border-radius: 8px; font-weight: 500; margin-bottom: 2px; }
.sf-nav a i { width: 18px; text-align: center; }
.sf-nav a:hover { background: var(--sf-surface-2); }
.sf-nav a.active { background: #eef2ff; color: var(--sf-primary); }
html[data-theme="dark"] .sf-nav a.active { background: #1f2540; }
.sf-main { flex: 1; margin-left: 250px; min-height: 100vh; display: flex; flex-direction: column; }
.sf-topbar { height: 60px; background: var(--sf-surface); border-bottom: 1px solid var(--sf-border);
  display: flex; align-items: center; padding: 0 20px; gap: 12px; position: sticky; top: 0; z-index: 1020; }
.sf-content { padding: 24px; flex: 1; }
.sf-menu-toggle { display: none; background: none; border: 0; font-size: 20px; color: var(--sf-text); cursor: pointer; }
.sf-topbar-title { font-weight: 600; font-size: 16px; }
.sf-topbar-right { margin-left: auto; display: flex; align-items: center; gap: 12px; }
.card { background: var(--sf-surface); border: 1px solid var(--sf-border);
  border-radius: var(--sf-radius); box-shadow: var(--sf-shadow); }
.card-body { padding: 20px; }
.card-title { font-weight: 600; margin: 0 0 12px; font-size: 15px; }
.stat-card { display: flex; align-items: center; gap: 14px; }
.stat-icon { width: 46px; height: 46px; border-radius: 10px; display: grid; place-items: center;
  font-size: 20px; background: var(--sf-surface-2); color: var(--sf-primary); }
.stat-value { font-size: 24px; font-weight: 700; line-height: 1.1; }
.stat-label { font-size: 12px; color: var(--sf-text-muted); text-transform: uppercase; letter-spacing: .04em; }
.form-label { font-weight: 500; margin-bottom: 6px; font-size: 13px; display: block; }
.form-control, .form-select { width: 100%; padding: 9px 12px; border: 1px solid var(--sf-border);
  background: var(--sf-surface); color: var(--sf-text); border-radius: 8px; font-size: 14px; outline: none; }
.form-control:focus, .form-select:focus { border-color: var(--sf-primary); box-shadow: 0 0 0 3px rgba(79,70,229,.15); }
textarea.form-control { resize: vertical; min-height: 80px; }
.form-group { margin-bottom: 14px; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 9px 16px; border-radius: 8px; border: 1px solid transparent;
  font-weight: 500; font-size: 14px; cursor: pointer; text-decoration: none; line-height: 1.2; }
.btn-primary { background: var(--sf-primary); color: #fff; }
.btn-primary:hover { background: var(--sf-primary-hover); color: #fff; }
.btn-secondary { background: var(--sf-surface-2); color: var(--sf-text); border-color: var(--sf-border); }
.btn-secondary:hover { background: var(--sf-border); }
.btn-success { background: var(--sf-success); color: #fff; }
.btn-danger { background: var(--sf-danger); color: #fff; }
.btn-sm { padding: 6px 12px; font-size: 13px; }
.btn:disabled { opacity: .6; cursor: not-allowed; }
.table-wrap { overflow-x: auto; border-radius: var(--sf-radius); }
table.sf-table { width: 100%; border-collapse: collapse; font-size: 14px; }
table.sf-table th, table.sf-table td { padding: 12px 14px; text-align: left; border-bottom: 1px solid var(--sf-border); vertical-align: middle; }
table.sf-table th { font-weight: 600; font-size: 12px; text-transform: uppercase; color: var(--sf-text-muted); }
table.sf-table tr:hover td { background: var(--sf-surface-2); }
.badge { display: inline-block; padding: 3px 9px; border-radius: 999px; font-size: 11px;
  font-weight: 600; text-transform: uppercase; }
.badge-success { background: rgba(16,185,129,.15); color: #059669; }
.badge-danger { background: rgba(239,68,68,.15); color: #dc2626; }
.badge-warning { background: rgba(245,158,11,.15); color: #d97706; }
.badge-info { background: rgba(14,165,233,.15); color: #0284c7; }
.badge-secondary { background: var(--sf-surface-2); color: var(--sf-text-muted); }
.badge-primary { background: rgba(79,70,229,.15); color: var(--sf-primary); }
.row { display: grid; gap: 16px; }
.row.cols-2 { grid-template-columns: repeat(2, 1fr); }
.row.cols-3 { grid-template-columns: repeat(3, 1fr); }
.row.cols-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 992px) { .row.cols-4, .row.cols-3 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 576px) { .row.cols-2, .row.cols-3, .row.cols-4 { grid-template-columns: 1fr; } }
.sf-toast-wrap { position: fixed; top: 20px; right: 20px; z-index: 9999; display: flex; flex-direction: column; gap: 8px; }
.sf-toast { background: var(--sf-surface); border: 1px solid var(--sf-border);
  border-left: 4px solid var(--sf-primary); border-radius: 8px; padding: 12px 16px;
  min-width: 260px; box-shadow: var(--sf-shadow); }
.sf-toast.success { border-left-color: var(--sf-success); }
.sf-toast.error { border-left-color: var(--sf-danger); }
.sf-modal-backdrop { position: fixed; inset: 0; background: rgba(0,0,0,.5); z-index: 9998;
  display: none; align-items: center; justify-content: center; padding: 20px; }
.sf-modal-backdrop.active { display: flex; }
.sf-modal { background: var(--sf-surface); border-radius: var(--sf-radius); width: 100%;
  max-width: 460px; padding: 22px; }
.sf-bottom-nav { display: none; position: fixed; bottom: 0; left: 0; right: 0;
  background: var(--sf-surface); border-top: 1px solid var(--sf-border); z-index: 1030; padding: 6px 0; }
.sf-bottom-nav .nav-row { display: flex; justify-content: space-around; }
.sf-bottom-nav a { flex: 1; text-align: center; padding: 6px; color: var(--sf-text-muted);
  font-size: 11px; display: flex; flex-direction: column; align-items: center; gap: 3px; }
.sf-bottom-nav a.active { color: var(--sf-primary); }
.sf-bottom-nav a i { font-size: 18px; }
@media (max-width: 768px) {
  .sf-sidebar { transform: translateX(-100%); }
  .sf-sidebar.open { transform: translateX(0); }
  .sf-main { margin-left: 0; }
  .sf-menu-toggle { display: inline-block; }
  .sf-content { padding: 16px; padding-bottom: 80px; }
  .sf-bottom-nav { display: block; }
}
.sf-overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,.4); z-index: 1025; }
.sf-overlay.active { display: block; }
.text-muted { color: var(--sf-text-muted); }
.mb-0{margin-bottom:0}.mb-1{margin-bottom:8px}.mb-2{margin-bottom:16px}.mb-3{margin-bottom:24px}
.mt-1{margin-top:8px}.mt-2{margin-top:16px}.mt-3{margin-top:24px}
.d-flex{display:flex}.align-center{align-items:center}.justify-between{justify-content:space-between}
.gap-1{gap:8px}.gap-2{gap:16px}.flex-wrap{flex-wrap:wrap}
.w-100{width:100%}.text-center{text-align:center}.text-right{text-align:right}.fw-600{font-weight:600}
.empty-state { padding: 40px 20px; text-align: center; color: var(--sf-text-muted); }
.empty-state i { font-size: 42px; opacity: .3; display: block; margin-bottom: 12px; }
.spinner { display: inline-block; width: 16px; height: 16px; border: 2px solid rgba(255,255,255,.4);
  border-top-color: #fff; border-radius: 50%; animation: spin .6s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.alert { padding: 12px 16px; border-radius: 8px; margin-bottom: 16px; font-size: 14px; }
.alert-danger { background: rgba(239,68,68,.12); color: #dc2626; border: 1px solid rgba(239,68,68,.25); }
.alert-success { background: rgba(16,185,129,.12); color: #059669; border: 1px solid rgba(16,185,129,.25); }
.alert-info { background: rgba(14,165,233,.12); color: #0284c7; border: 1px solid rgba(14,165,233,.25); }