/* ══════════════════════════════════════════════════════════
   SabrePayroll — Design System & Core Styles
   ══════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ── CSS Custom Properties ── */
:root {
  --primary: #6366f1;
  --primary-light: #818cf8;
  --primary-dark: #4f46e5;
  --primary-glow: rgba(99, 102, 241, 0.15);
  --accent: #10b981;
  --accent-light: #34d399;
  --warning: #f59e0b;
  --danger: #ef4444;
  --danger-light: #fca5a5;
  --info: #3b82f6;

  /* Light theme (default) */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --bg-card: #ffffff;
  --bg-sidebar: #0f172a;
  --bg-sidebar-hover: rgba(255, 255, 255, 0.08);
  --bg-sidebar-active: rgba(99, 102, 241, 0.2);
  --sidebar-text: #94a3b8;
  --sidebar-text-active: #ffffff;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.05);
  --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.15);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="medium"] {
  --bg-primary: #e2e8f0;
  --bg-secondary: #cbd5e1;
  --bg-tertiary: #b8c5d6;
  --bg-card: #e2e8f0;
  --text-primary: #1e293b;
  --text-secondary: #334155;
  --text-muted: #64748b;
  --border: #94a3b8;
  --border-light: #cbd5e1;
}

[data-theme="dark"] {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #1a2436;
  --bg-card: #1e293b;
  --bg-sidebar: #0a0f1a;
  --text-primary: #f1f5f9;
  --text-secondary: #cbd5e1;
  --text-muted: #64748b;
  --border: #334155;
  --border-light: #1e293b;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 8px rgba(0,0,0,0.3);
  --shadow-lg: 0 10px 20px rgba(0,0,0,0.4);
}

/* ── Reset & Base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg-secondary);
  color: var(--text-primary);
  height: 100%;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}

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

/* ── Sidebar ── */
.sidebar {
  width: 260px;
  background: var(--bg-sidebar);
  display: flex;
  flex-direction: column;
  transition: width var(--transition);
  z-index: 100;
  border-right: 1px solid rgba(255,255,255,0.05);
}

.sidebar-header {
  padding: 20px 20px 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.sidebar-logo {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: white;
  font-weight: 700;
  flex-shrink: 0;
}

.sidebar-title {
  color: white;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.3px;
}

.sidebar-subtitle {
  color: var(--sidebar-text);
  font-size: 11px;
  margin-top: 1px;
}

/* ── Navigation ── */
.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: 12px 10px;
}

.nav-section {
  margin-bottom: 6px;
}

.nav-section-label {
  color: var(--text-muted);
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  padding: 12px 12px 6px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  color: var(--sidebar-text);
  text-decoration: none;
  border-radius: var(--radius-sm);
  font-size: 13.5px;
  font-weight: 500;
  transition: all var(--transition);
  cursor: pointer;
  position: relative;
  margin: 1px 0;
}

.nav-item:hover {
  background: var(--bg-sidebar-hover);
  color: var(--sidebar-text-active);
}

.nav-item.active {
  background: var(--bg-sidebar-active);
  color: var(--sidebar-text-active);
}

.nav-item.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 6px;
  width: 3px;
  background: var(--primary);
  border-radius: 0 3px 3px 0;
}

.nav-icon { font-size: 16px; width: 22px; text-align: center; flex-shrink: 0; }

.nav-badge {
  margin-left: auto;
  background: var(--danger);
  color: white;
  font-size: 10px;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 10px;
  min-width: 18px;
  text-align: center;
}

/* ── Sidebar Footer ── */
.sidebar-footer {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 0;
}

.sidebar-footer-toggle {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 16px;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--sidebar-text);
  font-size: 11px;
  transition: background var(--transition);
}

.sidebar-footer-toggle:hover { background: rgba(255,255,255,0.03); }

.footer-avatar {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 600;
  color: white;
}

.sidebar-footer-content {
  padding: 8px 16px 14px;
}

.user-info { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; }
.user-name { color: var(--sidebar-text-active); font-size: 12px; font-weight: 600; }
.user-role { color: var(--primary-light); font-size: 10px; font-weight: 500; }
.user-company { color: var(--sidebar-text); font-size: 11px; margin-top: 4px; }

.dev-info {
  color: var(--text-muted);
  font-size: 10px;
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px solid rgba(255,255,255,0.06);
}

.hard-refresh-btn {
  background: rgba(255,255,255,0.06);
  color: var(--sidebar-text);
  border: none;
  padding: 3px 8px;
  border-radius: 4px;
  font-size: 10px;
  cursor: pointer;
  margin-top: 4px;
}
.hard-refresh-btn:hover { background: rgba(255,255,255,0.12); }

/* ── Main Content ── */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.dev-banner {
  background: linear-gradient(90deg, #1e293b, #334155);
  color: #94a3b8;
  padding: 6px 20px;
  font-size: 11px;
  font-weight: 500;
  display: none;
  align-items: center;
  gap: 8px;
  letter-spacing: 0.5px;
}

.dev-banner.show { display: flex; }

.content-header {
  background: var(--bg-primary);
  padding: 18px 28px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.page-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.5px;
}

.page-subtitle {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 2px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.content-body {
  flex: 1;
  overflow-y: auto;
  padding: 24px 28px;
}

/* ── KPI Cards ── */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.kpi-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 20px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.kpi-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.kpi-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  border-radius: var(--radius-md) var(--radius-md) 0 0;
}

.kpi-card.primary::before { background: var(--primary); }
.kpi-card.accent::before { background: var(--accent); }
.kpi-card.warning::before { background: var(--warning); }
.kpi-card.danger::before { background: var(--danger); }
.kpi-card.info::before { background: var(--info); }

.kpi-icon { font-size: 28px; margin-bottom: 8px; }
.kpi-value { font-size: 28px; font-weight: 800; color: var(--text-primary); letter-spacing: -1px; }
.kpi-label { font-size: 12px; color: var(--text-muted); font-weight: 500; margin-top: 4px; text-transform: uppercase; letter-spacing: 0.5px; }

.kpi-change {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  font-size: 11px;
  font-weight: 600;
  padding: 2px 6px;
  border-radius: 4px;
  margin-top: 8px;
}
.kpi-change.up { background: rgba(16,185,129,0.1); color: var(--accent); }
.kpi-change.down { background: rgba(239,68,68,0.1); color: var(--danger); }

/* ── Data Table ── */
.data-table-container {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.data-table thead { background: var(--bg-tertiary); }

.data-table th {
  padding: 12px 16px;
  text-align: left;
  font-weight: 600;
  color: var(--text-secondary);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 1px solid var(--border);
}

.data-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-light);
  color: var(--text-primary);
}

.data-table tbody tr { transition: background var(--transition); }
.data-table tbody tr:hover { background: var(--bg-tertiary); }
.data-table tbody tr:last-child td { border-bottom: none; }

/* ── Status Badges ── */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.3px;
}

.badge-pending { background: #fef3c7; color: #92400e; }
.badge-approved, .badge-finalized { background: #d1fae5; color: #065f46; }
.badge-rejected, .badge-cancelled { background: #fee2e2; color: #991b1b; }
.badge-processing, .badge-draft { background: #e0e7ff; color: #3730a3; }
.badge-paid { background: #d1fae5; color: #065f46; }
.badge-escalated { background: #fef3c7; color: #92400e; }

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 18px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

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

.btn-accent { background: var(--accent); color: white; }
.btn-accent:hover { background: #059669; }

.btn-danger { background: var(--danger); color: white; }
.btn-danger:hover { background: #dc2626; }

.btn-outline {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
}
.btn-outline:hover { background: var(--bg-tertiary); border-color: var(--text-muted); }

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  padding: 6px 12px;
}
.btn-ghost:hover { color: var(--text-primary); background: var(--bg-tertiary); }

.btn-sm { padding: 5px 12px; font-size: 12px; }
.btn-lg { padding: 12px 24px; font-size: 15px; }

/* ── Forms ── */
.form-group { margin-bottom: 16px; }

.form-label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 5px;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 13.5px;
  font-family: inherit;
  color: var(--text-primary);
  background: var(--bg-primary);
  transition: all var(--transition);
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

.form-textarea { resize: vertical; min-height: 80px; }

.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}

/* ── Modals ── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
}

.modal-overlay.active { opacity: 1; pointer-events: all; }

.modal {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  width: 90%;
  max-width: 560px;
  max-height: 85vh;
  overflow-y: auto;
}

.modal-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title { font-size: 18px; font-weight: 700; }

.modal-close {
  background: none;
  border: none;
  font-size: 20px;
  cursor: pointer;
  color: var(--text-muted);
  padding: 4px;
}

.modal-body { padding: 20px 24px; }
.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

/* ── Insight Cards (AI) ── */
.insight-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 14px;
  margin-bottom: 24px;
}

.insight-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex;
  gap: 12px;
  transition: all var(--transition);
}

.insight-card:hover { box-shadow: var(--shadow-sm); }
.insight-card.severity-critical { border-left: 3px solid var(--danger); }
.insight-card.severity-warning { border-left: 3px solid var(--warning); }
.insight-card.severity-info { border-left: 3px solid var(--info); }

.insight-icon { font-size: 24px; flex-shrink: 0; }
.insight-title { font-size: 13px; font-weight: 600; color: var(--text-primary); }
.insight-desc { font-size: 12px; color: var(--text-muted); margin-top: 4px; line-height: 1.4; }

/* ── Chatbot ── */
.chatbot-container {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.chatbot-messages {
  height: 300px;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.chat-msg {
  max-width: 85%;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  font-size: 13px;
  line-height: 1.5;
}

.chat-msg.bot {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  align-self: flex-start;
  border-bottom-left-radius: 4px;
}

.chat-msg.user {
  background: var(--primary);
  color: white;
  align-self: flex-end;
  border-bottom-right-radius: 4px;
}

.chatbot-input {
  display: flex;
  border-top: 1px solid var(--border);
}

.chatbot-input input {
  flex: 1;
  padding: 12px 16px;
  border: none;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 13px;
  font-family: inherit;
}
.chatbot-input input:focus { outline: none; }

.chatbot-input button {
  padding: 12px 18px;
  background: var(--primary);
  color: white;
  border: none;
  font-weight: 600;
  cursor: pointer;
}

/* ── Toolbar ── */
.toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.search-input {
  padding: 8px 14px 8px 36px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 13px;
  width: 260px;
  background: var(--bg-primary) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2'%3E%3Ccircle cx='11' cy='11' r='8'/%3E%3Cline x1='21' y1='21' x2='16.65' y2='16.65'/%3E%3C/svg%3E") 12px center no-repeat;
  color: var(--text-primary);
}

.search-input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-glow); }

/* ── Approval timeline ── */
.approval-timeline {
  padding: 16px 0;
}

.timeline-step {
  display: flex;
  gap: 12px;
  padding: 8px 0;
  position: relative;
}

.timeline-dot {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 12px;
  color: white;
}

.timeline-dot.pending { background: var(--text-muted); }
.timeline-dot.approved { background: var(--accent); }
.timeline-dot.rejected { background: var(--danger); }

/* ── Empty State ── */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
}

.empty-state-icon { font-size: 48px; margin-bottom: 12px; }
.empty-state-title { font-size: 18px; font-weight: 600; color: var(--text-secondary); margin-bottom: 6px; }
.empty-state-desc { font-size: 13px; max-width: 400px; margin: 0 auto; }

/* ── Responsive ── */
@media (max-width: 768px) {
  .sidebar {
    position: fixed;
    left: -260px;
    top: 0;
    bottom: 0;
    z-index: 200;
    transition: left var(--transition);
  }
  .sidebar.open { left: 0; }
  .kpi-grid { grid-template-columns: 1fr 1fr; }
  .content-body { padding: 16px; }
  .content-header { padding: 14px 16px; }
  .form-row { grid-template-columns: 1fr; }
}

/* ── Animations ── */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.fade-in { animation: fadeIn 0.3s ease-out; }

@keyframes slideIn {
  from { opacity: 0; transform: translateX(-12px); }
  to { opacity: 1; transform: translateX(0); }
}

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

.loading { animation: pulse 1.5s ease-in-out infinite; }

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

.sidebar-nav::-webkit-scrollbar { width: 4px; }
.sidebar-nav::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); }