:root {
  --bg-deep:    #0a1628;
  --bg-dark:    #0f1f3d;
  --bg-panel:   #152340;
  --bg-card:    #1a2d50;
  --border:     #1e3a5f;
  --accent:     #2563eb;
  --accent-light:#3b82f6;
  --accent-glow: rgba(37,99,235,0.15);
  --text:       #e2e8f0;
  --text-muted: #64748b;
  --text-dim:   #94a3b8;
  --success:    #10b981;
  --danger:     #ef4444;
  --warning:    #f59e0b;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; font-family: 'Segoe UI', system-ui, sans-serif; background: var(--bg-deep); color: var(--text); font-size: 14px; }

/* Layout */
.app-layout { display: flex; height: 100vh; overflow: hidden; }

/* Sidebar */
.sidebar { width: 240px; min-width: 240px; background: var(--bg-dark); border-right: 1px solid var(--border); display: flex; flex-direction: column; padding: 0; transition: transform 0.25s ease; }
.sidebar-brand { display: flex; align-items: center; gap: 12px; padding: 20px 16px; border-bottom: 1px solid var(--border); }
.sidebar-close { display: none; margin-left: auto; background: none; border: none; color: var(--text-dim); font-size: 20px; line-height: 1; cursor: pointer; padding: 4px 8px; border-radius: 6px; }
.sidebar-close:hover { background: var(--accent-glow); color: #fff; }

/* Hamburger toggle — hidden on desktop, shown at/below tablet breakpoint */
.sidebar-toggle { display: none; background: none; border: none; color: var(--text); font-size: 20px; line-height: 1; cursor: pointer; padding: 6px 10px; border-radius: 8px; margin-right: 8px; flex-shrink: 0; }
.sidebar-toggle:hover { background: var(--accent-glow); }

/* Backdrop shown behind an open off-canvas sidebar on tablet/phone */
.sidebar-backdrop { position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 1000; display: none; }
.sidebar-backdrop.show { display: block; }
.logo-sm { font-size: 28px; line-height: 1; }
.brand-name { font-size: 18px; font-weight: 700; color: var(--accent-light); letter-spacing: 0.5px; }
.brand-sub  { font-size: 11px; color: var(--text-muted); letter-spacing: 1px; text-transform: uppercase; }
.sidebar-nav { flex: 1; padding: 16px 8px; overflow-y: auto; }
.nav-section { margin-bottom: 24px; }
.nav-section-title { font-size: 10px; text-transform: uppercase; letter-spacing: 1.5px; color: var(--text-muted); padding: 0 8px; margin-bottom: 6px; }
.nav-item { display: flex; align-items: center; gap: 10px; padding: 9px 12px; border-radius: 8px; cursor: pointer; color: var(--text-dim); transition: all 0.15s; margin-bottom: 2px; }
.nav-item:hover { background: var(--accent-glow); color: var(--text); }
.nav-item.active { background: var(--accent); color: #fff; }
.nav-item .icon { font-size: 16px; width: 20px; text-align: center; }
.sidebar-footer { padding: 12px 8px; border-top: 1px solid var(--border); }
.user-info { display: flex; align-items: center; gap: 10px; padding: 8px 12px; margin-bottom: 4px; }
.user-avatar { width: 32px; height: 32px; border-radius: 50%; background: var(--accent); display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 14px; color: #fff; flex-shrink: 0; }
.user-name { font-size: 13px; font-weight: 600; }
.user-role { font-size: 11px; color: var(--text-muted); }

/* Main content */
.main-content { flex: 1; display: flex; flex-direction: column; overflow: hidden; }
.topbar { display: flex; align-items: center; justify-content: space-between; padding: 0 24px; height: 56px; background: var(--bg-dark); border-bottom: 1px solid var(--border); flex-shrink: 0; }
.topbar-title { font-size: 18px; font-weight: 600; }
.topbar-actions { display: flex; gap: 8px; }
.page-body { flex: 1; overflow-y: auto; padding: 24px; }

/* Cards */
.card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 12px; margin-bottom: 20px; overflow: hidden; }
.card-header { display: flex; align-items: center; justify-content: space-between; padding: 16px 20px; border-bottom: 1px solid var(--border); }
.card-title { font-size: 15px; font-weight: 600; }
.card-body { padding: 20px; }

/* Stats */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 16px; margin-bottom: 20px; }
.stat-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 12px; padding: 20px; }
.stat-label { font-size: 12px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 8px; }
.stat-value { font-size: 32px; font-weight: 700; color: var(--accent-light); }

/* Tables */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th { text-align: left; padding: 10px 12px; font-size: 11px; text-transform: uppercase; letter-spacing: 0.5px; color: var(--text-muted); border-bottom: 1px solid var(--border); white-space: nowrap; }
td { padding: 12px 12px; border-bottom: 1px solid rgba(30,58,95,0.5); vertical-align: middle; }
tr:last-child td { border-bottom: none; }
tr:hover td { background: rgba(37,99,235,0.05); }

/* Buttons */
.btn { display: inline-flex; align-items: center; gap: 6px; padding: 9px 16px; border-radius: 8px; border: none; cursor: pointer; font-size: 13px; font-weight: 500; transition: all 0.15s; text-decoration: none; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-light); }
.btn-secondary { background: var(--bg-panel); color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { background: var(--border); }
.btn-danger { background: rgba(239,68,68,0.15); color: var(--danger); border: 1px solid rgba(239,68,68,0.3); }
.btn-danger:hover { background: rgba(239,68,68,0.25); }
.btn-sm { padding: 5px 10px; font-size: 12px; border-radius: 6px; }
.btn-block { width: 100%; justify-content: center; }

/* Forms */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 11px; text-transform: uppercase; letter-spacing: 0.5px; color: var(--text-muted); margin-bottom: 6px; }
.form-group input, .form-group select, .form-group textarea { width: 100%; background: var(--bg-dark); border: 1px solid var(--border); border-radius: 8px; padding: 10px 14px; color: var(--text); font-size: 14px; outline: none; transition: border-color 0.15s; }
.form-group input:focus, .form-group select:focus { border-color: var(--accent); }
.form-group input::placeholder { color: var(--text-muted); }

/* Global .inp / .sel — toolbar inputs & selects used across all admin pages */
.inp, .sel {
  background: var(--bg-dark);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  outline: none;
  cursor: pointer;
}
.inp:focus, .sel:focus { border-color: var(--accent); }
/* Force dropdown options to follow the active colour scheme */
.sel option, .form-group select option, select option {
  background: var(--bg-dark);
  color: var(--text);
}

/* Search */
.search-bar { margin-bottom: 16px; }
.search-bar input { width: 100%; max-width: 360px; background: var(--bg-dark); border: 1px solid var(--border); border-radius: 8px; padding: 9px 14px; color: var(--text); font-size: 14px; outline: none; }
.search-bar input:focus { border-color: var(--accent); }

/* Badges */
.badge { display: inline-block; padding: 3px 8px; border-radius: 4px; font-size: 11px; font-weight: 600; letter-spacing: 0.3px; }
.badge-green  { background: rgba(16,185,129,0.15); color: #10b981; border: 1px solid rgba(16,185,129,0.3); }
.badge-red    { background: rgba(239,68,68,0.15);  color: #ef4444; border: 1px solid rgba(239,68,68,0.3); }
.badge-blue   { background: rgba(59,130,246,0.15); color: #3b82f6; border: 1px solid rgba(59,130,246,0.3); }
.badge-yellow { background: rgba(245,158,11,0.15); color: #f59e0b; border: 1px solid rgba(245,158,11,0.3); }

/* Alerts */
.alert { padding: 10px 14px; border-radius: 8px; font-size: 13px; margin-bottom: 12px; display: none; }
.alert.show { display: block; }
.alert-error { background: rgba(239,68,68,0.1); color: #ef4444; border: 1px solid rgba(239,68,68,0.3); }
.alert-success { background: rgba(16,185,129,0.1); color: #10b981; border: 1px solid rgba(16,185,129,0.3); }

/* Modal */
.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.7); display: none; align-items: center; justify-content: center; z-index: 1000; }
.modal-overlay.open { display: flex; }
.modal-overlay.active { display: flex; }
.modal { background: var(--bg-card); border: 1px solid var(--border); border-radius: 16px; padding: 28px; width: 100%; max-width: 480px; max-height: 90vh; overflow-y: auto; }
.modal-title { font-size: 18px; font-weight: 700; margin-bottom: 20px; }

/* Login page */
.login-page { min-height: 100vh; display: flex; align-items: center; justify-content: center; background: var(--bg-deep); padding: 20px; }
.login-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 20px; padding: 40px; width: 100%; max-width: 400px; }
.login-logo  { text-align: center; font-size: 48px; margin-bottom: 12px; }
.login-title { text-align: center; font-size: 24px; font-weight: 700; margin-bottom: 4px; }
.login-sub   { text-align: center; color: var(--text-muted); font-size: 13px; margin-bottom: 28px; }

/* Lang switcher */
.lang-switcher { display: flex; gap: 4px; padding: 4px 0; }
.lang-btn { background: transparent; border: 1px solid var(--border); color: var(--text-muted); padding: 3px 8px; border-radius: 4px; cursor: pointer; font-size: 11px; font-weight: 600; }
.lang-btn.active, .lang-btn:hover { background: var(--accent); border-color: var(--accent); color: #fff; }

code { background: rgba(37,99,235,0.1); padding: 2px 6px; border-radius: 4px; font-family: monospace; font-size: 12px; }
a { color: var(--accent-light); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── Light theme overrides (applied when .theme-light on <html>) ────────── */
.theme-light body { background: var(--bg-deep); color: var(--text); }
.theme-light .sidebar { background: var(--bg-sidebar); color: #e2e8f0; }
.theme-light .sidebar .nav-item { color: #cbd5e1; }
.theme-light .sidebar .nav-item:hover,
.theme-light .sidebar .nav-item.active { background: rgba(255,255,255,0.12); color: #fff; }
.theme-light .sidebar .brand-name,
.theme-light .sidebar .user-name { color: #f1f5f9; }
.theme-light .sidebar .brand-sub,
.theme-light .sidebar .user-role,
.theme-light .sidebar .nav-section-title { color: #94a3b8; }
.theme-light .topbar { background: var(--bg-panel); border-bottom: 1px solid var(--border); }
.theme-light .card { background: var(--bg-card); border: 1px solid var(--border); box-shadow: 0 1px 4px rgba(0,0,0,0.08); }
.theme-light .card-header { border-bottom: 1px solid var(--border); }
.theme-light .inp, .theme-light .sel { background: var(--bg-deep); color: var(--text); border-color: var(--border); }
.theme-light .inp:focus, .theme-light .sel:focus { border-color: var(--accent); }
.theme-light table thead th { background: var(--bg-deep); color: var(--text-muted); border-bottom: 1px solid var(--border); }
.theme-light table tbody tr:hover { background: rgba(0,0,0,0.03); }
.theme-light .modal { background: var(--bg-card); border-color: var(--border); box-shadow: 0 8px 32px rgba(0,0,0,0.12); }
.theme-light .modal-overlay { background: rgba(0,0,0,0.4); }
.theme-light .stat-card { background: var(--bg-deep); border: 1px solid var(--border); }
.theme-light .stat-card .stat-value { color: var(--accent); }
.theme-light .btn-secondary { background: var(--bg-deep); color: var(--text); border: 1px solid var(--border); }
.theme-light .btn-secondary:hover { background: var(--border); }
.theme-light code { background: var(--bg-deep); color: var(--accent); }
.theme-light .badge-green { background: rgba(5,150,105,0.12); color: #065f46; }
.theme-light .badge-red   { background: rgba(220,38,38,0.12);  color: #991b1b; }
.theme-light .badge-blue  { background: rgba(37,99,235,0.12);  color: #1e40af; }

/* ── Responsive: tablet & phone ──────────────────────────────────────────
   Sidebar becomes an off-canvas drawer below 900px (tablet portrait / phone).
   It slides in over the content instead of squeezing it. */
@media (max-width: 900px) {
  .sidebar-toggle { display: inline-flex; align-items: center; justify-content: center; }
  .sidebar-close { display: inline-block; }
  .sidebar {
    position: fixed;
    top: 0; left: 0; bottom: 0;
    width: 260px; min-width: 260px;
    z-index: 1001;
    transform: translateX(-100%);
    box-shadow: 4px 0 24px rgba(0,0,0,0.35);
  }
  .sidebar.open { transform: translateX(0); }
  .app-layout { position: relative; }
  .main-content { width: 100%; min-width: 0; }
  .topbar { padding: 0 12px; }
  .topbar-title { font-size: 16px; }
  .page-body { padding: 16px; }
  .stats-grid { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 12px; }
  .modal { max-width: calc(100vw - 32px); padding: 20px; }
}

/* ── Responsive: phone ───────────────────────────────────────────────────── */
@media (max-width: 480px) {
  .topbar { height: auto; min-height: 56px; flex-wrap: wrap; gap: 8px; padding: 8px 12px; }
  .topbar-actions, .topbar-right { width: 100%; flex-wrap: wrap; }
  .page-body { padding: 12px; }
  .card-body { padding: 14px; }
  .stats-grid { grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); gap: 10px; }
  .stat-value { font-size: 24px; }
  .modal { padding: 16px; border-radius: 12px; }
  .search-bar input { max-width: 100%; }
  table { font-size: 12px; }
  th, td { padding: 8px 8px; }
}