:root {
  --bg: #f1f5f9;
  --sidebar-bg: #0f172a;
  --sidebar-active: #3b82f6;
  --sidebar-width: 240px;
  --topbar-height: 60px;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  --text: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --border: #e2e8f0;
  --card-bg: #ffffff;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 3px 0 rgba(0,0,0,0.04), 0 1px 2px -1px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.05), 0 2px 4px -2px rgba(0,0,0,0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.07), 0 4px 6px -4px rgba(0,0,0,0.05);
  --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* Sidebar */
.sidebar {
  position: fixed; left: 0; top: 0; bottom: 0; width: var(--sidebar-width);
  background: var(--sidebar-bg); color: #fff; display: flex; flex-direction: column;
  transition: transform .25s ease; z-index: 1000; overflow: hidden;
}
.sidebar-brand {
  height: var(--topbar-height); display: flex; align-items: center; gap: 12px;
  padding: 0 20px; font-size: 18px; font-weight: 800; letter-spacing: -0.3px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.brand-icon { font-size: 24px; filter: drop-shadow(0 2px 4px rgba(0,0,0,0.2)); }
.sidebar-nav { flex: 1; overflow-y: auto; padding: 12px 10px; }
.nav-item {
  display: flex; align-items: center; gap: 12px; padding: 10px 14px;
  color: #94a3b8; text-decoration: none; border-radius: var(--radius-sm);
  margin-bottom: 4px; font-size: 13.5px; font-weight: 500;
  transition: var(--transition);
}
.nav-item:hover { background: rgba(255,255,255,0.06); color: #e2e8f0; }
.nav-item.active {
  background: linear-gradient(135deg, var(--sidebar-active) 0%, #60a5fa 100%);
  color: #fff; box-shadow: 0 4px 12px rgba(59,130,246,0.35);
}
.nav-icon { font-size: 18px; width: 22px; text-align: center; opacity: 0.9; }
.sidebar-footer {
  padding: 10px; border-top: 1px solid rgba(255,255,255,0.06);
}
.sidebar-footer .nav-item { font-size: 13px; }

/* Main wrapper */
.main-wrapper {
  margin-left: var(--sidebar-width);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
.topbar {
  height: var(--topbar-height); background: rgba(255,255,255,0.85);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border); display: flex; align-items: center;
  padding: 0 24px; gap: 16px; position: sticky; top: 0; z-index: 50;
}
.sidebar-toggle {
  background: none; border: none; font-size: 20px; cursor: pointer;
  color: var(--text-secondary); padding: 6px; border-radius: var(--radius-sm);
  transition: var(--transition); display: none;
}
.sidebar-toggle:hover { background: var(--bg); color: var(--text); }
.topbar-title { flex: 1; font-size: 18px; font-weight: 700; letter-spacing: -0.3px; }
.topbar-meta { display: flex; align-items: center; gap: 14px; font-size: 13px; color: var(--text-muted); }
.badge-role {
  padding: 4px 12px; border-radius: 999px; font-size: 11px;
  text-transform: uppercase; font-weight: 700; letter-spacing: .5px;
}
.role-superadmin { background: #fee2e2; color: #991b1b; }
.role-admin { background: #fef3c7; color: #92400e; }
.role-operator { background: #dbeafe; color: #1e40af; }
.role-viewer { background: #f1f5f9; color: #475569; }

/* Content */
.content { flex: 1; padding: 28px; }
.content.guest {
  display: flex; align-items: center; justify-content: center;
  min-height: 100vh; margin: 0;
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #334155 100%);
}

/* Flash messages */
.flash-messages { margin-bottom: 20px; display: flex; flex-direction: column; gap: 10px; }
.alert {
  padding: 14px 18px; border-radius: var(--radius-sm); font-size: 13.5px;
  border: 1px solid transparent; display: flex; align-items: center; gap: 10px;
  animation: slideDown 0.3s ease;
}
@keyframes slideDown {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}
.alert-success { background: #ecfdf5; color: #065f46; border-color: #a7f3d0; }
.alert-error { background: #fef2f2; color: #991b1b; border-color: #fecaca; }
.alert-warning { background: #fffbeb; color: #92400e; border-color: #fde68a; }
.alert-info { background: #eff6ff; color: #1e40af; border-color: #bfdbfe; }

/* Login page */
.login-container { display:flex; align-items:center; justify-content:center; min-height:100vh; padding: 20px; }
.login-card {
  background: rgba(255,255,255,0.97); padding: 44px; border-radius: var(--radius);
  box-shadow: 0 25px 50px -12px rgba(0,0,0,0.35); width:100%; max-width:420px;
  backdrop-filter: blur(20px); border: 1px solid rgba(255,255,255,0.2);
  animation: fadeUp 0.5s ease;
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
.login-brand { text-align:center; margin-bottom: 28px; }
.login-brand .brand-icon { font-size: 42px; display:block; margin-bottom: 10px; }
.login-brand h1 { margin:0; font-size: 24px; font-weight: 800; letter-spacing: -0.5px; }
.login-brand p { margin:8px 0 0; color: var(--text-muted); font-size: 14px; }
.login-form .form-group { margin-bottom: 18px; }
.login-form label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; color: var(--text-secondary); }
.login-form input[type="text"], .login-form input[type="password"] {
  width:100%; padding: 12px 14px; border: 1px solid var(--border); border-radius: var(--radius-sm);
  font-size: 14px; transition: var(--transition); background: #fff;
}
.login-form input:focus { outline:none; border-color: var(--primary); box-shadow: 0 0 0 4px rgba(37,99,235,0.1); }
.form-check { display:flex; align-items:center; gap:8px; font-size:13px; color: var(--text-secondary); }
.form-check input { width:auto; accent-color: var(--primary); }
.btn-block { width:100%; padding: 12px; font-size: 15px; }
.login-hint { margin-top: 22px; padding-top: 18px; border-top: 1px solid var(--border); text-align:center; font-size: 12px; color: var(--text-muted); }
.login-hint code { background: #f1f5f9; padding: 3px 8px; border-radius: 6px; font-size: 12px; font-family: "SF Mono", Monaco, monospace; }

/* Dashboard */
.stats-bar {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 20px; margin-bottom: 28px;
}
.stat-card {
  background: var(--card-bg); border-radius: var(--radius); padding: 20px 22px;
  box-shadow: var(--shadow); display: flex; align-items: center; gap: 16px;
  transition: var(--transition);
}
.stat-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.stat-icon {
  width: 48px; height: 48px; border-radius: var(--radius-sm); display: flex;
  align-items: center; justify-content: center; font-size: 22px;
}
.stat-info { flex: 1; }
.stat-value { font-size: 24px; font-weight: 800; letter-spacing: -0.5px; line-height: 1.2; }
.stat-label { font-size: 12px; color: var(--text-muted); font-weight: 500; margin-top: 4px; }

.task-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 20px; }
.task-card {
  background: var(--card-bg); border-radius: var(--radius); padding: 22px;
  box-shadow: var(--shadow); text-decoration: none; color: inherit;
  transition: var(--transition); position: relative; overflow: hidden;
}
.task-card::before {
  content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 4px;
  background: var(--color, var(--primary)); opacity: 0.85;
}
.task-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.task-header { display: flex; align-items: center; gap: 12px; margin-bottom: 10px; }
.task-icon {
  width: 40px; height: 40px; border-radius: 10px; display: flex;
  align-items: center; justify-content: center; font-size: 20px;
}
.task-title { font-size: 15px; font-weight: 700; }
.task-desc { font-size: 13px; color: var(--text-secondary); margin-bottom: 16px; line-height: 1.5; }
.kpi-row { display: flex; gap: 18px; flex-wrap: wrap; }
.kpi { min-width: 55px; }
.kpi-num { font-size: 18px; font-weight: 800; color: var(--text); letter-spacing: -0.3px; }
.kpi-label { font-size: 11px; color: var(--text-muted); text-transform: uppercase; font-weight: 600; margin-top: 3px; letter-spacing: 0.3px; }
.task-error { margin-top: 12px; font-size: 12px; color: var(--error); background: #fef2f2; padding: 10px 12px; border-radius: var(--radius-sm); border: 1px solid #fee2e2; }

/* Cards & general */
.card { background: var(--card-bg); border-radius: var(--radius); box-shadow: var(--shadow); padding: 24px; }
.card-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; }
.card-title { font-size: 16px; font-weight: 700; }
.card-icon { font-size: 28px; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 10px 18px; border-radius: var(--radius-sm); border: none;
  font-size: 13.5px; font-weight: 600; cursor: pointer; transition: var(--transition);
  line-height: 1;
}
.btn:active { transform: scale(0.97); }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #059669; }
.btn-danger { background: var(--error); color: #fff; }
.btn-danger:hover { background: #dc2626; }
.btn-sm { padding: 7px 14px; font-size: 12px; }

/* Forms */
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; color: var(--text-secondary); }
.form-control {
  width: 100%; padding: 10px 14px; border: 1px solid var(--border); border-radius: var(--radius-sm);
  font-size: 14px; transition: var(--transition); background: #fff; color: var(--text);
}
.form-control:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 4px rgba(37,99,235,0.1); }
select.form-control { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%2364748b' viewBox='0 0 16 16'%3E%3Cpath d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 12px center; padding-right: 36px; }

/* Tables */
.table-wrap { background: var(--card-bg); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; }
table.data-table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
table.data-table th, table.data-table td { padding: 14px 18px; text-align: left; border-bottom: 1px solid var(--border); }
table.data-table th { background: #f8fafc; font-weight: 700; font-size: 11px; text-transform: uppercase; letter-spacing: 0.5px; color: var(--text-secondary); }
table.data-table tbody tr { transition: background 0.15s; }
table.data-table tbody tr:hover td { background: #f8fafc; }
table.data-table tbody tr:last-child td { border-bottom: none; }

/* Pagination */
.pagination { display: flex; gap: 6px; justify-content: flex-end; margin-top: 20px; align-items: center; }
.pagination a, .pagination span { padding: 7px 13px; border-radius: var(--radius-sm); font-size: 13px; text-decoration: none; color: var(--text-secondary); border: 1px solid var(--border); background: #fff; font-weight: 500; transition: var(--transition); }
.pagination a:hover { background: var(--bg); border-color: #cbd5e1; }
.pagination .current { background: var(--primary); color: #fff; border-color: var(--primary); font-weight: 700; }

/* Search */
.search-bar { display: flex; gap: 10px; margin-bottom: 24px; align-items: center; }
.search-bar input { flex: 1; max-width: 320px; }

/* Empty state */
.empty-state { text-align: center; padding: 60px 20px; color: var(--text-muted); }
.empty-state-icon { font-size: 48px; margin-bottom: 16px; opacity: 0.5; }
.empty-state-text { font-size: 14px; }

/* Section title */
.section-title { font-size: 14px; font-weight: 700; color: var(--text-secondary); margin-bottom: 16px; text-transform: uppercase; letter-spacing: 0.5px; }

/* Responsive */
@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .main-wrapper { margin-left: 0; }
  .sidebar-toggle { display: block; }
  .topbar { padding: 0 16px; }
  .content { padding: 16px; }
  .card-grid, .task-grid, .stats-bar { grid-template-columns: 1fr; }
  .search-bar input { max-width: none; }
}

/* Scrollbar */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #cbd5e1; border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #94a3b8; }

/* Legacy compatibility classes */
.stats-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 16px; margin-bottom: 24px; }
.stats-row .stat-card { padding: 18px; }
.stat-num { font-size: 28px; font-weight: 800; color: var(--text); letter-spacing: -0.5px; }
.badge { padding: 4px 10px; border-radius: 999px; font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.3px; }
.badge-pending { background: #fef3c7; color: #92400e; }
.badge-confirmed { background: #dbeafe; color: #1e40af; }
.badge-completed { background: #d1fae5; color: #065f46; }
.badge-cancelled { background: #f1f5f9; color: #64748b; }
.btn-secondary { background: #f1f5f9; color: #475569; }
.btn-secondary:hover { background: #e2e8f0; }
.quick-links { display: flex; gap: 10px; flex-wrap: wrap; }

/* Loading overlay */
.loading-overlay { position: fixed; inset: 0; background: rgba(255,255,255,0.7); backdrop-filter: blur(4px); z-index: 2000; display: none; align-items: center; justify-content: center; flex-direction: column; gap: 16px; }
.loading-overlay.active { display: flex; }
.spinner { width: 40px; height: 40px; border: 4px solid var(--border); border-top-color: var(--primary); border-radius: 50%; animation: spin 0.8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* Skeleton screens */
.skeleton { background: linear-gradient(90deg, #f1f5f9 25%, #e2e8f0 50%, #f1f5f9 75%); background-size: 200% 100%; animation: skeleton 1.5s infinite; border-radius: var(--radius-sm); }
@keyframes skeleton { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }

/* Toast notifications */
.toast-container { position: fixed; top: 20px; right: 20px; z-index: 3000; display: flex; flex-direction: column; gap: 10px; max-width: 360px; }
.toast { background: var(--card-bg); border-radius: var(--radius); box-shadow: var(--shadow-lg); padding: 14px 18px; font-size: 13.5px; display: flex; align-items: flex-start; gap: 12px; animation: slideInRight 0.3s ease; border-left: 4px solid var(--primary); }
.toast-success { border-left-color: var(--success); }
.toast-error { border-left-color: var(--error); }
.toast-warning { border-left-color: var(--warning); }
.toast-info { border-left-color: var(--primary); }
.toast-close { background: none; border: none; font-size: 16px; color: var(--text-muted); cursor: pointer; margin-left: auto; padding: 0; line-height: 1; }
.toast-close:hover { color: var(--text); }
@keyframes slideInRight { from { opacity: 0; transform: translateX(20px); } to { opacity: 1; transform: translateX(0); } }

/* Table scroll wrapper */
.table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.table-scroll table { min-width: 640px; }

/* Dark mode */
body.dark-mode { --bg: #0f172a; --sidebar-bg: #020617; --sidebar-active: #3b82f6; --text: #f8fafc; --text-secondary: #94a3b8; --text-muted: #64748b; --border: #1e293b; --card-bg: #1e293b; }
body.dark-mode .topbar { background: rgba(30,41,59,0.85); border-bottom-color: #334155; }
body.dark-mode .data-table th { background: #334155; }
body.dark-mode .skeleton { background: linear-gradient(90deg, #1e293b 25%, #334155 50%, #1e293b 75%); }
body.dark-mode .login-card { background: rgba(30,41,59,0.97); }
body.dark-mode .form-control,
body.dark-mode .search-form input { background: #1e293b; color: #f8fafc; border-color: #334155; }

/* Error pages */
.error-page { text-align: center; padding: 80px 20px; }
.error-page h1 { font-size: 96px; font-weight: 900; color: var(--primary); margin: 0; line-height: 1; letter-spacing: -4px; opacity: 0.15; }
.error-page p { font-size: 18px; color: var(--text-secondary); margin: 16px 0 28px; }

/* Reddit */
.badge-running { background: #d1fae5; color: #065f46; }
.badge-stopped { background: #f1f5f9; color: #64748b; }
.badge-unknown { background: #fef3c7; color: #92400e; }

/* Data */
.file-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 10px; }
.file-item { background: #f8fafc; padding: 12px 16px; border-radius: var(--radius-sm); font-size: 13px; color: var(--text-secondary); border: 1px solid var(--border); transition: var(--transition); }
.file-item:hover { background: #f1f5f9; border-color: #cbd5e1; }

/* AI KB */
.search-form { display: flex; gap: 10px; }
.search-form input { flex: 1; padding: 10px 14px; border: 1px solid var(--border); border-radius: var(--radius-sm); font-size: 14px; }
.search-form input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 4px rgba(37,99,235,0.1); }
.product-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 14px; }
.product-card { background: #f8fafc; padding: 16px; border-radius: var(--radius-sm); border: 1px solid var(--border); transition: var(--transition); cursor: pointer; }
.product-card:hover { background: #fff; border-color: var(--primary); box-shadow: var(--shadow-md); }
.product-name { font-size: 14px; font-weight: 700; color: var(--text); margin-bottom: 6px; }
.product-meta { font-size: 12px; color: var(--text-muted); font-weight: 500; }