/* ===================== Design System — Phase 2 ===================== */
:root {
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --success: #16a34a;
  --success-bg: #f0fdf4;
  --warning: #d97706;
  --warning-bg: #fffbeb;
  --danger: #dc2626;
  --danger-bg: #fef2f2;
  --info: #0891b2;
  --info-bg: #ecfeff;
  --bg-body: #f1f5f9;
  --bg-card: #ffffff;
  --bg-dark: #0f172a;
  --bg-dark-2: #1e293b;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.1);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

/* ===================== Base ===================== */
body {
  font-family: var(--font);
  font-size: 15px;
  color: var(--text-primary);
  background: var(--bg-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5 {
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-primary);
}
h1 { font-size: 1.75rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.1rem; }

p { color: var(--text-secondary); }

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

/* ===================== Navbar ===================== */
.navbar {
  background: var(--bg-dark) !important;
  padding: 0.75rem 1.5rem;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  min-height: 64px;
}
.navbar-brand {
  font-size: 1.25rem;
  font-weight: 800;
  color: #fff !important;
  letter-spacing: -0.3px;
}
.navbar-brand span { color: #f5a623; }
.navbar .nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: rgba(255,255,255,0.65) !important;
  padding: 0.5rem 1rem !important;
  border-radius: var(--radius-sm);
  transition: all 0.2s;
}
.navbar .nav-link:hover,
.navbar .nav-link.active {
  color: #fff !important;
  background: rgba(255,255,255,0.08);
}
.navbar .nav-link i {
  margin-right: 6px;
  font-size: 0.85rem;
}

/* ===================== Page Layout ===================== */
.page-header {
  padding: 2rem 0 1rem;
}
.page-header h1 {
  margin: 0;
}
.page-header p {
  margin: 0.25rem 0 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}
.page-content {
  padding: 0 0 2rem;
}

/* ===================== Cards ===================== */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s;
}
.card:hover {
  box-shadow: var(--shadow);
}
.card-body {
  padding: 1.5rem;
}

/* Stat Cards */
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  position: relative;
  overflow: hidden;
  transition: all 0.2s;
}
.stat-card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-1px);
}
.stat-card .stat-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  margin-bottom: 1rem;
}
.stat-card .stat-value {
  font-size: 2rem;
  font-weight: 800;
  line-height: 1;
  margin-bottom: 0.25rem;
  letter-spacing: -1px;
}
.stat-card .stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
}
.stat-card.primary .stat-icon { background: rgba(37,99,235,0.1); color: var(--primary); }
.stat-card.success .stat-icon { background: rgba(22,163,74,0.1); color: var(--success); }
.stat-card.warning .stat-icon { background: rgba(217,119,6,0.1); color: var(--warning); }
.stat-card.danger .stat-icon { background: rgba(220,38,38,0.1); color: var(--danger); }
.stat-card.info .stat-icon { background: rgba(8,145,178,0.1); color: var(--info); }

/* ===================== Buttons ===================== */
.btn {
  font-family: var(--font);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-sm);
  min-height: 44px;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.btn-lg {
  padding: 0.85rem 1.75rem;
  font-size: 1.05rem;
  min-height: 52px;
}
.btn-sm {
  padding: 0.4rem 0.85rem;
  font-size: 0.85rem;
  min-height: 36px;
}
.btn-primary {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}
.btn-primary:hover {
  background: var(--primary-hover);
  border-color: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(37,99,235,0.3);
}
.btn-success {
  background: var(--success);
  border-color: var(--success);
}
.btn-success:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(22,163,74,0.3);
}
.btn-warning {
  background: var(--warning);
  border-color: var(--warning);
  color: #fff;
}
.btn-danger {
  background: var(--danger);
  border-color: var(--danger);
}
.btn-outline-secondary {
  border-color: var(--border);
  color: var(--text-secondary);
}
.btn-outline-secondary:hover {
  background: var(--bg-body);
  border-color: var(--text-muted);
}

/* Action Buttons (dashboard) */
.action-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 1.5rem 1rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.95rem;
  min-height: 120px;
  border: 2px solid transparent;
  transition: all 0.25s;
  text-decoration: none;
  color: #fff;
}
.action-btn i {
  font-size: 1.75rem;
}
.action-btn:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  color: #fff;
}
.action-btn.btn-primary { background: linear-gradient(135deg, #2563eb, #1d4ed8); }
.action-btn.btn-success { background: linear-gradient(135deg, #16a34a, #15803d); }
.action-btn.btn-warning { background: linear-gradient(135deg, #d97706, #b45309); }
.action-btn.btn-info { background: linear-gradient(135deg, #0891b2, #0e7490); color: #fff; }

/* ===================== Tables ===================== */
.table {
  font-size: 0.95rem;
  margin-bottom: 0;
}
.table thead th {
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  border-bottom: 2px solid var(--border);
  padding: 0.85rem 1rem;
  white-space: nowrap;
}
.table tbody td {
  padding: 0.85rem 1rem;
  vertical-align: middle;
  border-color: var(--border-light);
  min-height: 48px;
}
.table tbody tr:hover {
  background: rgba(37,99,235,0.02);
}
.table-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

/* ===================== Forms ===================== */
.form-control, .form-select {
  font-family: var(--font);
  font-size: 0.95rem;
  padding: 0.65rem 1rem;
  min-height: 44px;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--border);
  transition: all 0.2s;
}
.form-control:focus, .form-select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.12);
}
.form-label {
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 0.4rem;
}
.input-group .form-control {
  border-radius: var(--radius-sm) 0 0 var(--radius-sm);
}
.input-group .btn {
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

/* ===================== Badges ===================== */
.badge {
  font-weight: 600;
  font-size: 0.75rem;
  padding: 0.35em 0.65em;
  border-radius: 6px;
}
.badge-quality-high { background: var(--success-bg); color: var(--success); }
.badge-quality-medium { background: var(--warning-bg); color: var(--warning); }
.badge-quality-low { background: var(--danger-bg); color: var(--danger); }
.badge-quality-spam { background: #1e1e1e; color: #ef4444; }
.badge-confidence-high { background: var(--success-bg); color: var(--success); }
.badge-confidence-acceptable { background: var(--info-bg); color: var(--info); }
.badge-confidence-low { background: var(--warning-bg); color: var(--warning); }
.badge-confidence-rejected { background: var(--danger-bg); color: var(--danger); }

/* ===================== Status Indicators ===================== */
.status-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
  margin-right: 6px;
}
.status-dot.running { background: var(--success); box-shadow: 0 0 8px rgba(22,163,74,0.4); animation: pulse 2s infinite; }
.status-dot.idle { background: var(--text-muted); }
.status-dot.stale { background: var(--warning); }

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.status-card {
  padding: 1rem 1.25rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 12px;
}
.status-card .status-name {
  font-weight: 600;
  font-size: 0.95rem;
}
.status-card .status-info {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-left: auto;
}

/* ===================== Tabs ===================== */
.nav-tabs {
  border-bottom: 2px solid var(--border);
}
.nav-tabs .nav-link {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-muted);
  border: none;
  padding: 0.75rem 1.25rem;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: all 0.2s;
}
.nav-tabs .nav-link:hover {
  color: var(--text-primary);
  border-color: var(--border);
}
.nav-tabs .nav-link.active {
  color: var(--primary);
  border-color: var(--primary);
  background: none;
}

/* ===================== Alerts ===================== */
.alert {
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  padding: 1rem 1.25rem;
  border: none;
}

/* ===================== Login Page ===================== */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--bg-dark), var(--bg-dark-2));
}
.login-card {
  width: 100%;
  max-width: 420px;
  background: var(--bg-card);
  border-radius: 16px;
  padding: 2.5rem;
  box-shadow: var(--shadow-lg);
}
.login-card h2 {
  text-align: center;
  margin-bottom: 0.25rem;
}
.login-card .login-subtitle {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 2rem;
}

/* ===================== Pagination ===================== */
.pagination .page-link {
  font-family: var(--font);
  font-weight: 500;
  min-width: 40px;
  min-height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm) !important;
  margin: 0 2px;
  border-color: var(--border);
  color: var(--text-secondary);
}
.pagination .page-item.active .page-link {
  background: var(--primary);
  border-color: var(--primary);
}

/* ===================== Empty State ===================== */
.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-muted);
}
.empty-state i {
  font-size: 3rem;
  margin-bottom: 1rem;
  opacity: 0.3;
}
.empty-state h4 {
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

/* ===================== Responsive ===================== */
@media (max-width: 768px) {
  .stat-card .stat-value { font-size: 1.5rem; }
  .page-header { padding: 1.5rem 0 0.5rem; }
  .table { font-size: 0.85rem; }
  .btn { font-size: 0.85rem; padding: 0.55rem 1rem; }
}