/* ============================================
   SabreClock — Design System & Theme Engine
   Sabre Application Standards Compliant
   ============================================ */

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

/* ── CSS Custom Properties (Light Default) ── */
:root {
  /* Brand */
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --primary-light: rgba(99, 102, 241, 0.12);
  --primary-glow: rgba(99, 102, 241, 0.25);
  --accent: #06b6d4;
  --accent-hover: #0891b2;
  --success: #10b981;
  --success-light: rgba(16, 185, 129, 0.12);
  --warning: #f59e0b;
  --warning-light: rgba(245, 158, 11, 0.12);
  --danger: #ef4444;
  --danger-light: rgba(239, 68, 68, 0.12);

  /* Surfaces — Light Theme */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --bg-sidebar: #0f172a;
  --bg-sidebar-hover: rgba(255, 255, 255, 0.08);
  --bg-sidebar-active: rgba(99, 102, 241, 0.2);
  --bg-card: #ffffff;
  --bg-input: #ffffff;
  --bg-modal: #ffffff;
  --bg-overlay: rgba(0, 0, 0, 0.5);

  /* Text */
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --text-inverse: #f8fafc;
  --text-sidebar: #cbd5e1;
  --text-sidebar-active: #ffffff;

  /* Borders */
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  --border-focus: var(--primary);

  /* Shadows */
  --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 -1px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-glow: 0 0 20px var(--primary-glow);

  /* Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Spacing */
  --sidebar-width: 260px;
  --sidebar-collapsed-width: 60px;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Z-index layers */
  --z-sidebar: 100;
  --z-header: 90;
  --z-modal: 200;
  --z-toast: 300;
  --z-dev-banner: 400;
}

/* ── Medium Theme ── */
[data-theme="medium"] {
  --bg-primary: #e2e8f0;
  --bg-secondary: #cbd5e1;
  --bg-tertiary: #b0bec5;
  --bg-card: #d4dbe3;
  --bg-input: #d4dbe3;
  --bg-modal: #d4dbe3;
  --text-primary: #1e293b;
  --text-secondary: #334155;
  --text-muted: #475569;
  --border: #94a3b8;
  --border-light: #b0bec5;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.12);
}

/* ── Dark Theme ── */
[data-theme="dark"] {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --bg-sidebar: #020617;
  --bg-card: #1e293b;
  --bg-input: #1e293b;
  --bg-modal: #1e293b;
  --bg-overlay: rgba(0, 0, 0, 0.7);
  --text-primary: #f1f5f9;
  --text-secondary: #cbd5e1;
  --text-muted: #64748b;
  --border: #334155;
  --border-light: #1e293b;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.4);
}

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

html {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background: var(--bg-secondary);
  color: var(--text-primary);
  min-height: 100vh;
  overflow: hidden;
}

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

/* ── Dev Banner ── */
.dev-banner {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-dev-banner);
  background: linear-gradient(135deg, #f59e0b, #d97706);
  color: #1e293b;
  font-size: 11px;
  font-weight: 600;
  padding: 4px 16px;
  text-align: center;
  letter-spacing: 0.5px;
}

.dev-banner a {
  color: #1e293b;
  margin-left: 12px;
  text-decoration: underline;
}

body.localhost .dev-banner { display: block; }
body.localhost .sidebar { top: 26px; height: calc(100vh - 26px); }
body.localhost .main-content { margin-top: 26px; }

/* ── Sidebar ── */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background: var(--bg-sidebar);
  display: flex;
  flex-direction: column;
  z-index: var(--z-sidebar);
  transition: width var(--transition-normal);
  overflow: hidden;
}

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

.sidebar-logo {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}

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

.sidebar-subtitle {
  color: var(--text-muted);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* ── Nav Items ── */
.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: 12px 8px;
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,0.1) transparent;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  color: var(--text-sidebar);
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  margin-bottom: 2px;
  position: relative;
  border: none;
  background: none;
  width: 100%;
  text-align: left;
}

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

.nav-item.active {
  background: var(--bg-sidebar-active);
  color: var(--text-sidebar-active);
  font-weight: 600;
}

.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 {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  flex-shrink: 0;
}

.nav-section-divider {
  padding: 16px 12px 6px;
  font-size: 10px;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1.5px;
}

.nav-external {
  opacity: 0.7;
}

.nav-external:hover { opacity: 1; }

/* ── Collapsible Nav Sections ── */
.nav-section-collapsible {
  margin-top: 4px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 4px;
}

.nav-section-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 10px 12px 6px;
  font-size: 10px;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  background: none;
  border: none;
  cursor: pointer;
  transition: color var(--transition-fast);
}

.nav-section-toggle:hover { color: var(--text-sidebar); }

.mgmt-chevron {
  transition: transform var(--transition-fast);
}

.nav-section-collapsible.collapsed .mgmt-chevron {
  transform: rotate(-90deg);
}

.nav-section-body {
  overflow: hidden;
  max-height: 300px;
  transition: max-height 0.25s ease, opacity 0.2s ease;
  opacity: 1;
}

.nav-section-collapsible.collapsed .nav-section-body {
  max-height: 0;
  opacity: 0;
}

/* ── 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(--text-muted);
  font-size: 11px;
  transition: background var(--transition-fast);
}

.sidebar-footer-toggle:hover {
  background: rgba(255, 255, 255, 0.04);
}

.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: 700;
  color: white;
  flex-shrink: 0;
}

.footer-chevron {
  transition: transform var(--transition-fast);
}

.sidebar-footer-content {
  padding: 8px 16px 12px;
}

.user-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.user-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.user-name {
  color: var(--text-sidebar-active);
  font-size: 12px;
  font-weight: 600;
}

.user-role {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 9px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 2px 6px;
  border-radius: var(--radius-full);
  background: var(--primary-light);
  color: var(--primary);
}

.user-company {
  color: var(--text-muted);
  font-size: 11px;
  margin-top: 4px;
  display: flex;
  align-items: center;
  gap: 4px;
}

.btn-icon {
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 14px;
  transition: all var(--transition-fast);
}

.btn-icon:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-sidebar-active);
}

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

.sidebar-dev-info .build-version {
  opacity: 0.6;
  font-size: 9px;
}

.hard-refresh-btn {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  margin-top: 4px;
  padding: 2px 6px;
  font-size: 9px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.hard-refresh-btn:hover {
  background: rgba(255, 255, 255, 0.12);
  color: var(--text-sidebar-active);
}

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

.page-header {
  padding: 24px 32px 0;
}

.page-title {
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: var(--text-primary);
}

.page-subtitle {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 4px;
}

.page-content {
  flex: 1;
  padding: 20px 32px 32px;
  overflow-y: auto;
  max-height: calc(100vh - 80px);
}

body.localhost .page-content {
  max-height: calc(100vh - 106px);
}

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

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--stat-color, var(--primary));
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.stat-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.stat-card:hover::before { opacity: 1; }

.stat-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  background: var(--stat-bg, var(--primary-light));
}

.stat-value {
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -1px;
  line-height: 1;
}

.stat-label {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

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

.card:hover { box-shadow: var(--shadow-md); }

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

.card-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
}

.card-body { padding: 20px; }

/* ── Activity Feed ── */
.activity-list {
  list-style: none;
}

.activity-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border-light);
  transition: background var(--transition-fast);
}

.activity-item:last-child { border-bottom: none; }

.activity-badge {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  flex-shrink: 0;
}

.activity-badge.in { background: var(--success-light); }
.activity-badge.out { background: var(--danger-light); }
.activity-badge.break { background: var(--warning-light); }

.activity-info {
  flex: 1;
  min-width: 0;
}

.activity-name {
  font-weight: 600;
  font-size: 13px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.activity-detail {
  font-size: 11px;
  color: var(--text-muted);
}

.activity-time {
  font-size: 11px;
  color: var(--text-muted);
  flex-shrink: 0;
}

/* ── Empty State ── */
.empty-state {
  text-align: center;
  padding: 48px 24px;
  color: var(--text-muted);
}

.empty-state-icon {
  font-size: 48px;
  margin-bottom: 16px;
  opacity: 0.5;
}

.empty-state-text {
  font-size: 14px;
  font-weight: 500;
}

.empty-state-hint {
  font-size: 12px;
  margin-top: 8px;
  opacity: 0.7;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: 1px solid transparent;
  text-decoration: none;
  font-family: inherit;
}

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

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

.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border-color: var(--border);
}

.btn-secondary:hover {
  background: var(--border);
}

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

.btn-danger:hover {
  background: #dc2626;
}

.btn-sm { padding: 5px 10px; font-size: 12px; }

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
}

.btn-ghost:hover {
  background: var(--bg-tertiary);
}

/* ── Modals ── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: var(--bg-overlay);
  z-index: var(--z-modal);
  display: none;
  align-items: center;
  justify-content: center;
  animation: fadeIn 0.2s ease;
}

.modal-overlay.active { display: flex; }

.modal {
  background: var(--bg-modal);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  width: 90%;
  max-width: 480px;
  max-height: 80vh;
  overflow-y: auto;
  animation: slideUp 0.3s ease;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px 12px;
}

.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;
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast);
}

.modal-close:hover { background: var(--bg-tertiary); }

.modal-body { padding: 12px 24px 24px; }

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  padding: 16px 24px;
  border-top: 1px solid var(--border-light);
}

/* ── Client Selector Modal ── */
.client-search {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-input);
  color: var(--text-primary);
  font-size: 13px;
  font-family: inherit;
  margin-bottom: 12px;
  outline: none;
  transition: border-color var(--transition-fast);
}

.client-search:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}

.client-list {
  max-height: 300px;
  overflow-y: auto;
}

.client-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.client-item:hover { background: var(--bg-tertiary); }

.client-item.active {
  background: var(--primary-light);
  color: var(--primary);
}

.client-item-name { font-weight: 600; font-size: 13px; }
.client-item-meta { font-size: 11px; color: var(--text-muted); }

/* ── Impersonation Banner ── */
.impersonation-banner {
  display: none;
  padding: 6px 16px;
  background: linear-gradient(135deg, #f59e0b, #d97706);
  color: #1e293b;
  font-size: 12px;
  font-weight: 600;
  text-align: center;
}

/* ── Grid layout helpers ── */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }

/* ── Page: placeholder ── */
.page-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 400px;
  color: var(--text-muted);
  text-align: center;
}

.page-placeholder-icon {
  font-size: 64px;
  margin-bottom: 20px;
  opacity: 0.4;
}

.page-placeholder-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-secondary);
}

.page-placeholder-desc {
  font-size: 13px;
  margin-top: 8px;
  max-width: 400px;
}

/* ── Animations ── */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideUp {
  from { transform: translateY(20px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

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

/* ── Status indicators ── */
.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}

.status-dot.online { background: var(--success); box-shadow: 0 0 6px var(--success); }
.status-dot.offline { background: var(--text-muted); }

/* ── Toast / Notifications ── */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  box-shadow: var(--shadow-lg);
  font-size: 13px;
  display: flex;
  align-items: center;
  gap: 8px;
  animation: slideUp 0.3s ease;
  min-width: 280px;
}

.toast.success { border-left: 3px solid var(--success); }
.toast.error { border-left: 3px solid var(--danger); }
.toast.warning { border-left: 3px solid var(--warning); }

/* ── Responsive ── */
@media (max-width: 768px) {
  .sidebar { width: 100%; transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .main-content { margin-left: 0; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .page-content { padding: 16px; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
}

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