:root {
  --bg: #1A1A1A; --bg2: #252525; --bg3: #2E2E2E;
  --text: #FFFFFF; --muted: #9CA3AF; --border: #3A3A3A;
  --accent: #C0C0C0; --blue: #2563EB;
  --danger: #DC2626; --danger-bg: #2D1111;
  --success: #16A34A; --success-bg: #0D2818;
  --amber: #D97706; --amber-bg: #2D1F00;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif; background: var(--bg); color: var(--text); min-height: 100vh; }
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--text); }

/* Topbar */
.topbar { background: #111; border-bottom: 1px solid var(--border); padding: 0 24px; height: 56px; display: flex; align-items: center; justify-content: space-between; position: sticky; top: 0; z-index: 10; }
.topbar-logo { display: flex; align-items: center; gap: 10px; }
.topbar-logo img { width: 32px; height: 32px; border-radius: 50%; object-fit: cover; }
.topbar-logo span { font-weight: 800; font-size: 15px; letter-spacing: -0.3px; }
.topbar-right { display: flex; align-items: center; gap: 16px; font-size: 13px; color: var(--muted); }
.branch-tag { background: var(--bg3); border: 1px solid var(--border); padding: 3px 10px; border-radius: 20px; font-size: 12px; font-weight: 600; color: var(--accent); }
.logout-btn { background: none; border: none; color: var(--muted); cursor: pointer; font-size: 13px; }
.logout-btn:hover { color: var(--text); }

/* Sidenav */
.sidenav { width: 200px; background: #111; border-right: 1px solid var(--border); padding: 20px 0; position: fixed; top: 56px; bottom: 0; left: 0; overflow-y: auto; }
.sidenav a { display: flex; align-items: center; gap: 10px; padding: 10px 20px; font-size: 14px; font-weight: 500; color: var(--muted); border-left: 3px solid transparent; }
.sidenav a:hover, .sidenav a.active { color: var(--text); background: var(--bg2); border-left-color: var(--accent); }

/* Layout */
.main { margin-left: 200px; padding: 28px 32px; min-height: calc(100vh - 56px); }

/* Cards */
.card { background: var(--bg2); border: 1px solid var(--border); border-radius: 10px; padding: 20px 24px; }
.card-title { font-size: 11px; font-weight: 800; text-transform: uppercase; letter-spacing: 0.6px; color: var(--muted); margin-bottom: 8px; }
.kpi-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 14px; margin-bottom: 24px; }
.kpi-value { font-size: 28px; font-weight: 800; letter-spacing: -0.5px; }
.kpi-sub { font-size: 12.5px; color: var(--muted); margin-top: 4px; }

/* Table */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
th { text-align: left; padding: 10px 12px; font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.5px; color: var(--muted); border-bottom: 1px solid var(--border); }
td { padding: 12px 12px; border-bottom: 1px solid var(--border); vertical-align: middle; }
tr:last-child td { border-bottom: none; }
tr:hover td { background: var(--bg3); }

/* Badges */
.badge { display: inline-block; padding: 3px 9px; border-radius: 20px; font-size: 11.5px; font-weight: 700; }
.badge-red { background: var(--danger-bg); color: var(--danger); }
.badge-amber { background: var(--amber-bg); color: var(--amber); }
.badge-green { background: var(--success-bg); color: var(--success); }

/* Stock status aliases (spec compliance) */
.stock-red { color: var(--danger); background: var(--danger-bg); }
.stock-amber { color: var(--amber); }
.stock-green { color: var(--success); }

/* Forms */
.form-group { margin-bottom: 16px; }
label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; color: var(--accent); }
input[type="text"], input[type="password"], input[type="number"], input[type="date"], input[type="tel"], select, textarea { width: 100%; padding: 10px 13px; background: var(--bg3); border: 1px solid var(--border); border-radius: 7px; color: var(--text); font-size: 14px; font-family: inherit; }
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--accent); }

/* Buttons */
.btn { padding: 10px 20px; border-radius: 7px; font-size: 14px; font-weight: 700; cursor: pointer; border: none; transition: opacity 0.15s; }
.btn:hover { opacity: 0.85; }
.btn-primary { background: var(--text); color: var(--bg); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-outline { background: transparent; border: 1px solid var(--border); color: var(--text); }

/* Page header */
.page-head { margin-bottom: 24px; }
.page-head h1 { font-size: 22px; font-weight: 800; letter-spacing: -0.3px; }
.page-head .sub { font-size: 13px; color: var(--muted); margin-top: 4px; }

/* Alerts */
.alert { padding: 12px 16px; border-radius: 8px; font-size: 13.5px; margin-bottom: 16px; }
.alert-error { background: var(--danger-bg); color: var(--danger); border: 1px solid var(--danger); }
.alert-success { background: var(--success-bg); color: var(--success); border: 1px solid var(--success); }

/* Modal */
.modal-overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.7); z-index: 100; align-items: center; justify-content: center; }
.modal-overlay.open { display: flex; }
.modal { background: var(--bg2); border: 1px solid var(--border); border-radius: 12px; padding: 28px; width: 100%; max-width: 480px; }
.modal h2 { font-size: 17px; font-weight: 800; margin-bottom: 16px; }
.modal-actions { display: flex; gap: 10px; justify-content: flex-end; margin-top: 20px; }

/* Rota grid */
.rota-table th, .rota-table td { min-width: 90px; text-align: center; }
.rota-table td:first-child { text-align: left; min-width: 160px; font-weight: 600; }
.shift-cell { padding: 6px 8px; border-radius: 5px; font-size: 12px; font-weight: 700; border: 1px solid var(--border); background: var(--bg3); color: var(--muted); width: 100%; cursor: pointer; }
.shift-cell.day { background: #1a2a1a; color: var(--success); border-color: var(--success); }
.shift-cell.night { background: #1a1a2a; color: #818CF8; border-color: #818CF8; }

/* Sidebar aliases (spec compliance) */
.sidebar { width: 220px; background: #141414; min-height: 100vh; padding: 24px 0; position: fixed; left: 0; top: 0; }
.sidebar-logo { padding: 0 20px 24px; border-bottom: 1px solid var(--border); }
.sidebar-nav a { display: block; padding: 12px 20px; color: var(--accent); text-decoration: none; }
.sidebar-nav a:hover, .sidebar-nav a.active { background: var(--bg2); color: var(--text); }
.main-content { margin-left: 220px; padding: 32px; }
.page-title { font-size: 1.5rem; font-weight: 700; margin-bottom: 24px; }

/* Input field alias */
.input-field { background: var(--bg3); border: 1px solid var(--border); color: var(--text); padding: 10px 14px; border-radius: 6px; width: 100%; box-sizing: border-box; }
.input-field:focus { outline: none; border-color: var(--accent); }
.label { color: var(--accent); font-size: 0.85rem; margin-bottom: 6px; display: block; }

/* KPI aliases */
.kpi-label { font-size: 0.85rem; color: var(--muted); margin-top: 4px; }

/* Table container alias */
.table-container { overflow-x: auto; }

/* Hamburger button */
.hamburger-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text);
  padding: 6px;
  flex-direction: column;
  gap: 5px;
  align-items: center;
  justify-content: center;
}
.hamburger-btn span { display: block; width: 20px; height: 2px; background: var(--text); border-radius: 2px; }

/* Mobile overlay */
.mobile-overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.55); z-index: 40; }
.mobile-overlay.open { display: block; }

/* Mobile slide-in menu */
.mobile-menu {
  position: fixed;
  top: 0; right: -290px;
  width: 280px; height: 100vh;
  background: #111;
  border-left: 1px solid var(--border);
  z-index: 50;
  display: flex;
  flex-direction: column;
  transition: right 0.22s ease;
  overflow-y: auto;
}
.mobile-menu.open { right: 0; }

.mobile-menu-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 20px 16px;
  border-bottom: 1px solid var(--border);
}
.mobile-menu-name { font-size: 15px; font-weight: 700; color: var(--text); margin-bottom: 3px; }
.mobile-menu-branch { font-size: 12px; color: var(--muted); }
.mobile-menu-close { background: none; border: none; color: var(--muted); cursor: pointer; font-size: 22px; line-height: 1; padding: 2px 4px; }
.mobile-menu-close:hover { color: var(--text); }

.mobile-menu-nav { flex: 1; padding: 8px 0; }
.mobile-nav-link {
  display: block;
  padding: 14px 20px;
  font-size: 15px;
  font-weight: 600;
  color: var(--muted);
  border-left: 3px solid transparent;
  text-decoration: none;
}
.mobile-nav-link:hover { color: var(--text); background: var(--bg2); border-left-color: var(--accent); }

.mobile-menu-signout {
  margin: 12px 20px 28px;
  padding: 12px 16px;
  background: none;
  border: 1px solid var(--border);
  border-radius: 7px;
  color: var(--muted);
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  text-align: left;
  width: calc(100% - 40px);
}
.mobile-menu-signout:hover { color: var(--danger); border-color: var(--danger); }

@media (max-width: 768px) {
  .sidenav { display: none; }
  .main { margin-left: 0; padding: 16px; }
  .sidebar { display: none; }
  .main-content { margin-left: 0; }
  .hamburger-btn { display: flex; }
  .topbar-desktop { display: none !important; }
  .kpi-grid { grid-template-columns: 1fr 1fr; }
}