:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #eff6ff;
  --sidebar-bg: #1e293b;
  --sidebar-text: #cbd5e1;
  --sidebar-hover: #334155;
  --sidebar-active: #2563eb;
  --sidebar-width: 240px;
  --topbar-height: 60px;
  --bg: #f8fafc;
  --card-bg: #ffffff;
  --border: #e2e8f0;
  --text: #1e293b;
  --text-muted: #64748b;
  --success: #16a34a;
  --danger: #dc2626;
  --warning: #d97706;
  --info: #0284c7;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
  --shadow-md: 0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.06);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── Layout ── */
.layout { display: flex; min-height: 100vh; }

/* ── Sidebar ── */
.sidebar {
  width: var(--sidebar-width);
  background: var(--sidebar-bg);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0;
  height: 100vh;
  z-index: 100;
  transition: transform .25s ease;
}

.sidebar-brand {
  padding: 20px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  border-bottom: 1px solid #334155;
}

.sidebar-brand .brand-icon {
  width: 36px; height: 36px;
  background: var(--primary);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  color: white; font-size: 18px;
}

.sidebar-brand .brand-text {
  color: white;
  font-weight: 700;
  font-size: 15px;
  line-height: 1.2;
}

.sidebar-brand .brand-sub {
  color: var(--sidebar-text);
  font-size: 11px;
}

.sidebar-nav { flex: 1; padding: 12px 0; overflow-y: auto; scrollbar-width: none; }
.sidebar-nav::-webkit-scrollbar { display: none; }

.nav-section { padding: 8px 16px 4px; }
.nav-section-label {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: #475569;
  font-weight: 600;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 16px;
  color: var(--sidebar-text);
  border-radius: 6px;
  margin: 1px 8px;
  transition: background .15s, color .15s;
  font-size: 13.5px;
}

.nav-item:hover { background: var(--sidebar-hover); color: white; text-decoration: none; }
.nav-item.active { background: var(--sidebar-active); color: white; }
.nav-item .nav-icon { width: 18px; text-align: center; font-size: 15px; }

.sidebar-footer {
  padding: 12px 16px;
  border-top: 1px solid #334155;
}

.user-info { display: flex; align-items: center; gap: 10px; }
.user-avatar {
  width: 32px; height: 32px;
  background: var(--primary);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: white; font-weight: 700; font-size: 13px;
  flex-shrink: 0;
}
.user-name { color: white; font-size: 13px; font-weight: 500; }
.user-role { color: var(--sidebar-text); font-size: 11px; }
.logout-btn {
  margin-left: auto;
  color: #94a3b8;
  font-size: 16px;
  background: none; border: none; cursor: pointer;
  padding: 4px;
  border-radius: 4px;
  transition: color .15s;
}
.logout-btn:hover { color: #ef4444; }

/* ── Main content ── */
.main-content {
  margin-left: var(--sidebar-width);
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ── Topbar ── */
.topbar {
  height: var(--topbar-height);
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 24px;
  gap: 16px;
  position: sticky; top: 0; z-index: 50;
}

.topbar-title { font-size: 18px; font-weight: 600; color: var(--text); }
.topbar-spacer { flex: 1; }

/* ── Profile Dropdown ── */
.profile-wrap { position: relative; }

.profile-btn {
  display: flex; align-items: center; gap: 8px;
  background: none; border: 1px solid var(--border);
  border-radius: 10px; padding: 5px 10px;
  cursor: pointer; transition: background .15s;
}
.profile-btn:hover { background: var(--bg); }

.profile-avatar {
  width: 32px; height: 32px; border-radius: 50%;
  background: var(--primary); color: white;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 13px; flex-shrink: 0;
}

.profile-info { text-align: left; }
.profile-name { font-size: 13px; font-weight: 600; color: var(--text); line-height: 1.2; }
.profile-role { font-size: 11px; color: var(--text-muted); }

.profile-dropdown {
  display: none;
  position: absolute; top: calc(100% + 8px); right: 0;
  background: white; border: 1px solid var(--border);
  border-radius: 12px; box-shadow: 0 8px 24px rgba(0,0,0,.12);
  min-width: 220px; z-index: 500;
  overflow: hidden;
}
.profile-dropdown.open { display: block; }

.profile-dropdown-header {
  display: flex; align-items: center; gap: 12px;
  padding: 14px 16px; background: var(--bg);
}
.profile-role-badge {
  display: inline-block; margin-top: 3px;
  font-size: 10px; font-weight: 600;
  background: var(--primary-light); color: var(--primary);
  padding: 1px 8px; border-radius: 10px;
}
.profile-dropdown-divider { height: 1px; background: var(--border); }

.profile-dropdown-item {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 16px; font-size: 13px; color: var(--text);
  text-decoration: none; transition: background .1s;
}
.profile-dropdown-item:hover { background: var(--bg); }
.profile-dropdown-item i { width: 16px; color: var(--text-muted); }

.profile-logout { color: var(--danger); }
.profile-logout i { color: var(--danger); }
.profile-logout:hover { background: #fef2f2; }

.topbar-badge {
  background: var(--primary-light);
  color: var(--primary);
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 500;
}

.menu-toggle {
  display: none;
  background: none; border: none;
  font-size: 20px; cursor: pointer;
  color: var(--text);
}

/* ── Page content ── */
.page-content { padding: 24px; flex: 1; }

/* ── Cards ── */
.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.card-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.card-title { font-size: 15px; font-weight: 600; color: var(--text); }
.card-body { padding: 20px; }

/* ── Stat cards ── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  box-shadow: var(--shadow);
}

.stat-icon {
  width: 48px; height: 48px;
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
}

.stat-icon.blue { background: #eff6ff; color: #2563eb; }
.stat-icon.green { background: #f0fdf4; color: #16a34a; }
.stat-icon.orange { background: #fff7ed; color: #ea580c; }
.stat-icon.purple { background: #faf5ff; color: #7c3aed; }
.stat-icon.red { background: #fef2f2; color: #dc2626; }

.stat-value { font-size: 22px; font-weight: 700; color: var(--text); }
.stat-label { font-size: 12px; color: var(--text-muted); margin-top: 2px; }

/* ── Buttons ── */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 16px;
  border-radius: 6px;
  border: 1px solid transparent;
  font-size: 13.5px;
  font-weight: 500;
  cursor: pointer;
  transition: all .15s;
  white-space: nowrap;
  text-decoration: none;
}

.btn:hover { text-decoration: none; }
.btn-sm { padding: 5px 10px; font-size: 12px; }
.btn-lg { padding: 10px 20px; font-size: 15px; }
.btn-icon { padding: 7px; }

.btn-primary { background: var(--primary); color: white; border-color: var(--primary); }
.btn-primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); color: white; }

.btn-success { background: #16a34a; color: white; border-color: #16a34a; }
.btn-success:hover { background: #15803d; color: white; }

.btn-danger { background: #dc2626; color: white; border-color: #dc2626; }
.btn-danger:hover { background: #b91c1c; color: white; }

.btn-warning { background: #d97706; color: white; border-color: #d97706; }
.btn-warning:hover { background: #b45309; color: white; }

.btn-outline { background: transparent; color: var(--text); border-color: var(--border); }
.btn-outline:hover { background: var(--bg); color: var(--text); }

.btn-outline-primary { background: transparent; color: var(--primary); border-color: var(--primary); }
.btn-outline-primary:hover { background: var(--primary-light); }

/* ── Forms ── */
.form-group { margin-bottom: 16px; }
.form-label { display: block; font-size: 13px; font-weight: 500; margin-bottom: 5px; color: var(--text); }
.form-label .required { color: var(--danger); margin-left: 2px; }

.form-control {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
  color: var(--text);
  background: white;
  transition: border-color .15s, box-shadow .15s;
  outline: none;
}

.form-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,.1);
}

.form-control.is-invalid { border-color: var(--danger); }
.form-hint { font-size: 12px; color: var(--text-muted); margin-top: 4px; }

.form-grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; }

/* ── Tables ── */
.table-wrapper { overflow-x: auto; }

table { width: 100%; border-collapse: collapse; }
thead th {
  background: #f8fafc;
  padding: 10px 14px;
  text-align: left;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .04em;
  border-bottom: 1px solid var(--border);
}
tbody td {
  padding: 11px 14px;
  border-bottom: 1px solid var(--border);
  font-size: 13.5px;
  color: var(--text);
}
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover { background: #f8fafc; }

/* ── Badges ── */
.badge {
  display: inline-flex; align-items: center;
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .04em;
}
.badge-success { background: #dcfce7; color: #166534; }
.badge-danger { background: #fee2e2; color: #991b1b; }
.badge-warning { background: #fef3c7; color: #92400e; }
.badge-info { background: #e0f2fe; color: #075985; }
.badge-secondary { background: #f1f5f9; color: #475569; }

/* ── Alerts / Flash ── */
.flash-container { padding: 0 24px; padding-top: 16px; }

.alert {
  padding: 12px 16px;
  border-radius: var(--radius);
  border: 1px solid;
  margin-bottom: 8px;
  display: flex; align-items: flex-start; gap: 10px;
  font-size: 13.5px;
}
.alert-success { background: #f0fdf4; border-color: #bbf7d0; color: #166534; }
.alert-danger { background: #fef2f2; border-color: #fecaca; color: #991b1b; }
.alert-warning { background: #fffbeb; border-color: #fde68a; color: #92400e; }
.alert-info { background: #eff6ff; border-color: #bfdbfe; color: #1e40af; }

.alert-close {
  margin-left: auto; background: none; border: none;
  cursor: pointer; font-size: 16px; line-height: 1;
  opacity: .5; transition: opacity .15s;
}
.alert-close:hover { opacity: 1; }

/* ── Empty state ── */
.empty-state {
  text-align: center;
  padding: 48px 24px;
  color: var(--text-muted);
}
.empty-state .empty-icon { font-size: 48px; margin-bottom: 12px; }
.empty-state h3 { font-size: 16px; color: var(--text); margin-bottom: 6px; }

/* ── Search bar ── */
.search-bar {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: white;
}
.search-bar input {
  border: none; outline: none; flex: 1;
  font-size: 14px; color: var(--text);
}
.search-bar .search-icon { color: var(--text-muted); }

/* ── Pagination ── */
.pagination { display: flex; gap: 4px; align-items: center; }
.page-btn {
  width: 32px; height: 32px;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 13px;
  cursor: pointer;
  color: var(--text);
  background: white;
  transition: all .15s;
}
.page-btn:hover { background: var(--primary-light); border-color: var(--primary); color: var(--primary); }
.page-btn.active { background: var(--primary); border-color: var(--primary); color: white; }

/* ── Responsive ── */
@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .main-content { margin-left: 0; }
  .menu-toggle { display: block; }
  .form-grid-2, .form-grid-3 { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
}