:root {
  --tw-primary: #0d5b4e;
  --tw-primary-hover: #094037;
  --tw-primary-light: #e6f0ee;
  --tw-bg: #f4f6f5;
  --tw-surface: #ffffff;
  --tw-border: #e2e8f0;
  --tw-text-main: #0f172a;
  --tw-text-muted: #64748b;
  --tw-danger: #dc2626;
  --tw-danger-light: #fee2e2;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --sidebar-width: 260px;
}

* { box-sizing: border-box; margin: 0; padding: 0; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, sans-serif; }
body { background-color: var(--tw-bg); color: var(--tw-text-main); font-size: 14px; line-height: 1.5; -webkit-tap-highlight-color: transparent; }

/* Admin Layout Scaffolding */
.admin-layout { display: flex; min-height: 100vh; }
.admin-sidebar { width: var(--sidebar-width); background: #081c18; color: #fff; flex-shrink: 0; display: flex; flex-direction: column; transition: transform 0.25s ease; z-index: 40; }
.admin-main { flex-grow: 1; display: flex; flex-direction: column; min-width: 0; }
.admin-header { height: 64px; background: var(--tw-surface); border-bottom: 1px solid var(--tw-border); display: flex; align-items: center; justify-content: space-between; padding: 0 24px; }
.admin-content { padding: 24px; flex-grow: 1; max-width: 1400px; margin: 0 auto; width: 100%; }

/* Mobile Sidebar Drawer (Tested at 390px) */
@media (max-width: 768px) {
  .admin-sidebar { position: fixed; top: 0; bottom: 0; left: 0; transform: translateX(-100%); }
  .admin-sidebar.open { transform: translateX(0); }
  .admin-header { padding: 0 16px; }
  .admin-content { padding: 16px; }
  .mobile-only { display: block !important; }
}

/* UI Elements & Controls */
.nav-link { display: flex; align-items: center; gap: 12px; padding: 12px 16px; color: #94a3b8; text-decoration: none; border-radius: var(--radius-sm); font-weight: 500; transition: all 0.2s; }
.nav-link:hover, .nav-link.active { background: rgba(255,255,255,0.08); color: #fff; }
.nav-link.active { border-left: 3px solid var(--tw-primary); background: rgba(13, 91, 78, 0.2); }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; font-weight: 600; padding: 10px 18px; border-radius: var(--radius-sm); border: 1px solid transparent; cursor: pointer; transition: background 0.2s, border-color 0.2s; font-size: 14px; text-decoration: none; }
.btn-primary { background-color: var(--tw-primary); color: #fff; }
.btn-primary:hover { background-color: var(--tw-primary-hover); }
.btn-secondary { background-color: #fff; border-color: var(--tw-border); color: var(--tw-text-main); }
.btn-secondary:hover { background-color: #f8fafc; }
.btn-danger { background-color: var(--tw-danger); color: #fff; }
.btn-sm { padding: 6px 12px; font-size: 12px; }

/* Status Badges */
.badge { display: inline-flex; align-items: center; gap: 4px; padding: 2px 8px; border-radius: 12px; font-size: 12px; font-weight: 600; text-transform: capitalize; }
.badge-stock { background: #f1f5f9; color: #475569; }
.badge-unactivated { background: #fef3c7; color: #b45309; }
.badge-active { background: #d1fae5; color: #047857; }
.badge-disabled { background: var(--tw-danger-light); color: var(--tw-danger); }

/* Responsive Data Tables */
.data-table-container { background: var(--tw-surface); border: 1px solid var(--tw-border); border-radius: var(--radius-md); overflow: hidden; box-shadow: var(--shadow-sm); }
.data-table { width: 100%; border-collapse: collapse; text-align: left; }
.data-table th { background: #f8fafc; padding: 12px 16px; font-weight: 600; color: var(--tw-text-muted); border-bottom: 1px solid var(--tw-border); font-size: 12px; text-transform: uppercase; letter-spacing: 0.05em; }
.data-table td { padding: 14px 16px; border-bottom: 1px solid var(--tw-border); vertical-align: middle; }

@media (max-width: 768px) {
  .data-table, .data-table tbody, .data-table tr, .data-table td { display: block; width: 100%; }
  .data-table thead { display: none; }
  .data-table tr { padding: 16px; border-bottom: 8px solid var(--tw-bg); background: var(--tw-surface); }
  .data-table td { display: flex; justify-content: space-between; align-items: center; padding: 8px 0; border: none; font-size: 13px; }
  .data-table td::before { content: attr(data-label); font-weight: 600; color: var(--tw-text-muted); }
}

/* Modal Overlay Scaffolding */
.modal-overlay { position: fixed; top: 0; left: 0; right: 0; bottom: 0; background: rgba(15, 23, 42, 0.6); backdrop-filter: blur(4px); display: flex; align-items: center; justify-content: center; z-index: 50; padding: 16px; opacity: 0; pointer-events: none; transition: opacity 0.2s ease; }
.modal-overlay.active { opacity: 1; pointer-events: auto; }
.modal-card { background: var(--tw-surface); border-radius: var(--radius-lg); width: 100%; max-width: 480px; padding: 24px; box-shadow: var(--shadow-md); transform: translateY(8px); transition: transform 0.2s ease; }
.modal-overlay.active .modal-card { transform: translateY(0); }

/* Spinner Keyframes */
@keyframes tw-spin { to { transform: rotate(360deg); } }
.spinner { border: 3px solid #e2e8f0; border-top-color: var(--tw-primary); border-radius: 50%; width: 28px; height: 28px; animation: tw-spin 0.8s linear infinite; }