/* CSS Custom Properties & Reset */
:root {
  /* Colors - Dark Theme (Default) */
  --bg-primary: #0b0f19;
  --bg-secondary: rgba(22, 28, 45, 0.65);
  --bg-card: rgba(30, 41, 59, 0.45);
  --bg-sidebar: rgba(17, 24, 39, 0.85);
  
  --border-color: rgba(255, 255, 255, 0.08);
  --border-focus: rgba(99, 102, 241, 0.4);
  
  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --text-inverse: #0b0f19;
  
  --primary: #6366f1; /* Indigo */
  --primary-glow: rgba(99, 102, 241, 0.15);
  --primary-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
  --secondary: #06b6d4; /* Cyan */
  --secondary-gradient: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
  
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.15);
  --shadow-md: 0 8px 32px 0 rgba(0, 0, 0, 0.25);
  --shadow-lg: 0 12px 48px 0 rgba(0, 0, 0, 0.35);
  
  --font-sans: 'Plus Jakarta Sans', 'Outfit', system-ui, -apple-system, sans-serif;
  --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --border-radius-sm: 8px;
  --border-radius-md: 16px;
  --border-radius-lg: 24px;
}

/* Light Theme overrides */
.light-theme {
  --bg-primary: #f8fafc;
  --bg-secondary: rgba(241, 245, 249, 0.8);
  --bg-card: rgba(255, 255, 255, 0.7);
  --bg-sidebar: rgba(255, 255, 255, 0.9);
  
  --border-color: rgba(0, 0, 0, 0.06);
  --border-focus: rgba(99, 102, 241, 0.2);
  
  --text-main: #1e293b;
  --text-muted: #64748b;
  --text-inverse: #ffffff;
  
  --primary-glow: rgba(99, 102, 241, 0.08);
  
  --shadow-md: 0 8px 32px 0 rgba(31, 38, 135, 0.06);
  --shadow-lg: 0 12px 48px 0 rgba(31, 38, 135, 0.1);
}

/* Base Reset */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-main);
  min-height: 100vh;
  overflow-x: hidden;
  transition: background-color 0.5s ease, color 0.3s ease;
}

body.modal-open {
  overflow: hidden;
}

body.sidebar-open {
  overflow: hidden;
}

/* Glow Background Elements */
.glow-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  pointer-events: none;
  overflow: hidden;
}

.glow-sphere {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.12;
  transition: opacity 0.5s ease;
}

.dark-theme .glow-sphere {
  opacity: 0.18;
}

.sphere-1 {
  top: -10%;
  right: -10%;
  width: 50vw;
  height: 50vw;
  background: var(--primary);
}

.sphere-2 {
  bottom: -10%;
  left: -10%;
  width: 45vw;
  height: 45vw;
  background: var(--secondary);
}

/* App Container Layout */
.app-container {
  display: flex;
  min-height: 100vh;
  width: 100%;
}

.app-container.app-locked {
  display: none;
}

.auth-screen {
  min-height: 100vh;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.auth-screen.hidden {
  display: none;
}

.auth-card {
  width: min(440px, 100%);
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  padding: 2rem;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  box-shadow: var(--shadow-lg);
}

.auth-brand {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 1.75rem;
}

.auth-brand h1 {
  font-size: 1.45rem;
  line-height: 1.1;
}

.auth-brand p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: 4px;
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.hidden {
  display: none !important;
}

.auth-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 1.5rem 0;
  color: var(--text-muted);
  font-size: 0.8rem;
}

.auth-divider::before,
.auth-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background-color: var(--border-color);
}

.telegram-login-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  min-height: 48px;
}

#telegram-login-container {
  display: none;
}

.telegram-login-box p {
  color: var(--text-muted);
  font-size: 0.82rem;
  text-align: center;
  line-height: 1.4;
}

.auth-error {
  min-height: 1.25rem;
  color: var(--danger);
  font-size: 0.9rem;
  margin-top: 1rem;
  text-align: center;
}

.app-container.client-mode .sidebar,
.app-container.client-mode .mobile-menu-toggle,
.app-container.client-mode .header-search,
.app-container.client-mode #theme-toggle,
.app-container.client-mode #edit-client-btn,
.app-container.client-mode .detail-card-actions,
.app-container.client-mode .qr-actions,
.app-container.client-mode .add-record-form,
.app-container.client-mode .back-navigation {
  display: none !important;
}

.app-container.client-mode .main-content {
  margin-left: 0;
  width: 100%;
}

.app-container.client-mode .top-header {
  justify-content: flex-end;
}

/* Sidebar Styling */
.sidebar {
  width: 280px;
  background-color: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
  position: fixed;
  height: 100vh;
  z-index: 10;
  transition: var(--transition-smooth);
}

.sidebar-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(11, 15, 25, 0.55);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  z-index: 9;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 3rem;
  padding-left: 0.5rem;
}

.brand-icon {
  width: 40px;
  height: 40px;
  background: var(--primary-gradient);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.25rem;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.35);
}

.brand-name {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, var(--text-main) 30%, var(--primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-menu {
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex-grow: 1;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 18px;
  color: var(--text-muted);
  text-decoration: none;
  border-radius: var(--border-radius-sm);
  font-weight: 500;
  font-size: 0.95rem;
  transition: var(--transition-smooth);
  border: 1px solid transparent;
}

.nav-item i {
  font-size: 1.2rem;
  transition: var(--transition-smooth);
}

.nav-item:hover {
  color: var(--text-main);
  background-color: rgba(255, 255, 255, 0.03);
}

.light-theme .nav-item:hover {
  background-color: rgba(0, 0, 0, 0.02);
}

.nav-item.active {
  color: white;
  background: var(--primary-gradient);
  box-shadow: 0 4px 20px rgba(99, 102, 241, 0.25);
  font-weight: 600;
}

.light-theme .nav-item.active {
  color: white;
}

.nav-item.active i {
  transform: scale(1.1);
}

.connection-status {
  display: flex;
  align-items: center;
  gap: 12px;
  background-color: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  padding: 12px;
  border-radius: var(--border-radius-sm);
  margin-top: auto;
}

.light-theme .connection-status {
  background-color: rgba(0, 0, 0, 0.01);
}

.status-indicator {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  position: relative;
}

.status-indicator::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  animation: pulse 1.8s infinite;
}

.status-indicator.online {
  background-color: var(--success);
}
.status-indicator.online::after {
  background-color: var(--success);
}

.status-indicator.offline {
  background-color: var(--danger);
}
.status-indicator.offline::after {
  background-color: var(--danger);
}

.status-details {
  display: flex;
  flex-direction: column;
}

.status-title {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 500;
}

.status-ip {
  font-size: 0.8rem;
  font-weight: 600;
  font-family: monospace;
}

/* Main Content Styling */
.main-content {
  flex-grow: 1;
  margin-left: 280px;
  padding: 2rem 3rem;
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
  min-height: 100vh;
}

/* Top Header */
.top-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.mobile-menu-toggle {
  display: none;
  flex-shrink: 0;
}

.header-search {
  position: relative;
  flex-grow: 1;
  max-width: 600px;
}

.search-icon {
  position: absolute;
  left: 18px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 1rem;
}

.header-search input {
  width: 100%;
  padding: 14px 18px 14px 48px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  outline: none;
  transition: var(--transition-smooth);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.header-search input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px var(--primary-glow);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.icon-btn {
  width: 44px;
  height: 44px;
  border-radius: var(--border-radius-sm);
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  cursor: pointer;
  transition: var(--transition-smooth);
  backdrop-filter: blur(12px);
}

.icon-btn:hover {
  background-color: rgba(255, 255, 255, 0.05);
  border-color: var(--text-muted);
  transform: translateY(-2px);
}

.light-theme .icon-btn:hover {
  background-color: rgba(0, 0, 0, 0.03);
}

.admin-profile {
  display: flex;
  align-items: center;
  cursor: pointer;
}

.avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--secondary-gradient);
  color: white;
  font-weight: 600;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(6, 182, 212, 0.35);
  border: 2px solid rgba(255, 255, 255, 0.2);
}

/* Views Management */
.content-view {
  display: none;
  animation: fadeIn 0.4s ease forwards;
  flex-direction: column;
  gap: 2rem;
}

.content-view.active {
  display: flex;
}

/* Dashboard Home */
.welcome-banner {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(6, 182, 212, 0.05) 100%);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: 2.5rem 3rem;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  position: relative;
  overflow: hidden;
}

.welcome-banner h1 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
  letter-spacing: -0.5px;
}

.welcome-banner p {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 600px;
}

@media (max-width: 1100px) {
  .main-content {
    padding: 1.5rem;
  }
}

/* Stats Cards Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.stat-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  padding: 1.75rem;
  display: flex;
  align-items: center;
  gap: 20px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: var(--transition-smooth);
}

.stat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(255, 255, 255, 0.15);
}

.light-theme .stat-card:hover {
  border-color: rgba(0, 0, 0, 0.1);
}

.stat-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: white;
}

.clients-icon {
  background: var(--primary-gradient);
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.3);
}

.active-icon {
  background: var(--secondary-gradient);
  box-shadow: 0 4px 14px rgba(6, 182, 212, 0.3);
}

.records-icon {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  box-shadow: 0 4px 14px rgba(16, 185, 129, 0.3);
}

.stat-info h3 {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.stat-value {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.5px;
}

/* Dashboard Widgets Layout */
.dashboard-widgets {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 1.5rem;
}

@media (max-width: 1024px) {
  .dashboard-widgets {
    grid-template-columns: 1fr;
  }
}

.widget-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  padding: 1.75rem;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

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

.widget-header h2 {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.3px;
}

.text-btn {
  background: none;
  border: none;
  color: var(--primary);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  font-family: var(--font-sans);
  transition: var(--transition-smooth);
}

.text-btn:hover {
  text-decoration: underline;
  opacity: 0.9;
}

/* Recent Clients List Widget */
.recent-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.recent-client-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background-color: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  transition: var(--transition-smooth);
  cursor: pointer;
}

.light-theme .recent-client-item {
  background-color: rgba(0, 0, 0, 0.01);
}

.recent-client-item:hover {
  background-color: rgba(255, 255, 255, 0.05);
  border-color: var(--primary);
  transform: translateX(4px);
}

.light-theme .recent-client-item:hover {
  background-color: rgba(0, 0, 0, 0.02);
}

.client-item-info {
  display: flex;
  align-items: center;
  gap: 14px;
}

.client-item-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  color: var(--primary);
}

.light-theme .client-item-avatar {
  background: rgba(0, 0, 0, 0.03);
}

.client-item-details h4 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 2px;
}

.client-item-details span {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-family: monospace;
}

.client-item-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 4px;
}

.client-item-phone {
  font-size: 0.85rem;
  font-weight: 500;
}

.client-item-sub {
  font-size: 0.75rem;
  color: var(--secondary);
  background-color: rgba(6, 182, 212, 0.08);
  padding: 2px 8px;
  border-radius: 20px;
  font-weight: 600;
}

/* Actions Widget */
.actions-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  height: 100%;
}

.action-btn-card {
  background-color: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  cursor: pointer;
  transition: var(--transition-smooth);
  font-family: var(--font-sans);
}

.light-theme .action-btn-card {
  background-color: rgba(0, 0, 0, 0.01);
}

.action-btn-card:hover {
  background-color: rgba(99, 102, 241, 0.04);
  border-color: var(--primary);
  transform: translateY(-2px);
}

.action-btn-card i {
  font-size: 2rem;
}

.action-btn-card span {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-main);
}

.text-primary {
  color: var(--primary);
}

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

/* Views Common Headers */
.view-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.view-header h1 {
  font-size: 1.75rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 4px;
}

.view-header p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* Tables and Filters */
.table-container {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  padding: 1.5rem;
  backdrop-filter: blur(16px);
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.table-filters {
  display: flex;
  gap: 1rem;
}

.filter-search {
  position: relative;
  flex-grow: 1;
}

.filter-search i {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
}

.filter-search input {
  width: 100%;
  padding: 12px 16px 12px 42px;
  background-color: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  color: var(--text-main);
  outline: none;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  transition: var(--transition-smooth);
}

.light-theme .filter-search input {
  background-color: rgba(0, 0, 0, 0.01);
}

.filter-search input:focus {
  border-color: var(--primary);
  background-color: rgba(255, 255, 255, 0.05);
}

.clients-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.clients-table th {
  padding: 14px 16px;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-color);
  letter-spacing: 0.5px;
}

.clients-table td {
  padding: 16px;
  font-size: 0.95rem;
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition-smooth);
}

.clients-table tbody tr {
  cursor: pointer;
  transition: var(--transition-smooth);
}

.clients-table tbody tr:hover td {
  background-color: rgba(255, 255, 255, 0.02);
  color: white;
}

.light-theme .clients-table tbody tr:hover td {
  background-color: rgba(0, 0, 0, 0.01);
  color: var(--text-main);
}

.id-cell {
  font-family: monospace;
  font-weight: 700;
  color: var(--secondary);
}

.name-cell {
  font-weight: 600;
}

.phone-cell {
  font-family: monospace;
}

.sub-pill {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 700;
  background-color: rgba(99, 102, 241, 0.1);
  color: var(--primary);
  border: 1px solid rgba(99, 102, 241, 0.15);
}

.action-cell {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.empty-state, .loading-state {
  text-align: center;
  padding: 3rem;
  color: var(--text-muted);
  font-style: italic;
}

/* Forms container */
.form-container {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  padding: 2.5rem;
  backdrop-filter: blur(16px);
  max-width: 800px;
}

.crm-form {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

@media (max-width: 600px) {
  .form-grid {
    grid-template-columns: 1fr;
  }
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group.full-width {
  grid-column: 1 / -1;
}

.form-group label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}

.form-group label i {
  color: var(--primary);
}

.required {
  color: var(--danger);
}

.form-group input, .form-select {
  padding: 12px 16px;
  background-color: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  outline: none;
  transition: var(--transition-smooth);
}

.light-theme .form-group input, .light-theme .form-select {
  background-color: rgba(0, 0, 0, 0.01);
}

.form-group input:focus, .form-select:focus {
  border-color: var(--primary);
  background-color: rgba(255, 255, 255, 0.05);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

.form-actions {
  display: flex;
  justify-content: flex-end;
  gap: 1rem;
  border-top: 1px solid var(--border-color);
  padding-top: 1.5rem;
  flex-wrap: wrap;
}

.subscription-term-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.subscription-term-buttons .btn {
  white-space: nowrap;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-main);
}

.checkbox-label input {
  width: 18px;
  height: 18px;
  accent-color: var(--primary);
}

.lesson-entries {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.lesson-entry {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 1rem;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  background: var(--bg-card);
}

.lesson-entry-top {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 140px 44px;
  gap: 0.85rem;
  align-items: end;
}

.lesson-select-group,
.lesson-hours-group {
  min-width: 0;
}

.lesson-hours-group .lesson-hours {
  text-align: center;
}

.lesson-entry-actions {
  display: flex;
  justify-content: flex-start;
}

.lesson-time-group {
  margin-top: -0.15rem;
}

.lesson-time-options {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.lesson-time-option {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 0.8rem;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  background: var(--bg-secondary);
  color: var(--text-main);
  cursor: pointer;
}

.lesson-time-option input {
  accent-color: var(--primary);
}

.lesson-time-help,
.lesson-time-empty {
  margin: 0.15rem 0 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.lesson-add-btn {
  width: 36px;
  height: 36px;
  border-radius: var(--border-radius-sm);
}

.lesson-add-btn.hidden {
  visibility: hidden;
  pointer-events: none;
}

.lesson-remove-btn {
  width: 44px;
  height: 44px;
}

.lesson-remove-btn.hidden {
  visibility: hidden;
  pointer-events: none;
}

@media (max-width: 760px) {
  .lesson-entry-top {
    grid-template-columns: 1fr 110px;
  }

  .lesson-entry-top .lesson-remove-btn {
    grid-column: 2;
    grid-row: 1;
    justify-self: end;
  }
}

@media (max-width: 520px) {
  .lesson-entry-top {
    grid-template-columns: 1fr;
  }

  .lesson-entry-top .lesson-remove-btn {
    grid-column: auto;
    grid-row: auto;
    justify-self: start;
  }
}

/* Client Details page */
.back-navigation {
  margin-bottom: 0.5rem;
}

.back-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition-smooth);
  font-family: var(--font-sans);
}

.back-btn:hover {
  color: var(--text-main);
  transform: translateX(-4px);
}

.client-details-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 1.5rem;
}

@media (max-width: 900px) {
  .client-details-grid {
    grid-template-columns: 1fr;
  }
}

.detail-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  padding: 2rem;
  backdrop-filter: blur(16px);
}

.main-info-card {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.detail-card-header {
  display: flex;
  justify-content: justify;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1.5rem;
  gap: 1rem;
}

.client-badge {
  display: flex;
  align-items: center;
  gap: 16px;
}

.badge-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--primary-glow);
  border: 1px solid rgba(99, 102, 241, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--primary);
}

.badge-text h2 {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.3px;
  margin-bottom: 4px;
}

.client-id-pill {
  font-family: monospace;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--secondary);
  background-color: rgba(6, 182, 212, 0.08);
  padding: 2px 10px;
  border-radius: 20px;
}

.detail-card-body {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

@media (max-width: 500px) {
  .detail-card-body {
    grid-template-columns: 1fr;
  }
}

.info-row {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.info-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.info-label i {
  color: var(--primary);
  width: 14px;
}

.info-value {
  font-size: 1.05rem;
  font-weight: 600;
}

.subscription-val {
  color: var(--primary);
}

/* QR card */
.qr-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 1.25rem;
}

.qr-card h2 {
  font-size: 1.25rem;
}

.qr-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.qr-code-container {
  background-color: white;
  padding: 16px;
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.qr-code-container img {
  width: 180px;
  height: 180px;
  display: block;
}

.qr-actions {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* History Card */
.history-card {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.add-record-form {
  display: flex;
  gap: 12px;
}

.add-record-form input {
  flex-grow: 1;
  padding: 12px 16px;
  background-color: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  color: var(--text-main);
  outline: none;
  font-family: var(--font-sans);
  transition: var(--transition-smooth);
}

.light-theme .add-record-form input {
  background-color: rgba(0, 0, 0, 0.01);
}

.add-record-form input:focus {
  border-color: var(--primary);
  background-color: rgba(255, 255, 255, 0.05);
}

.records-timeline {
  display: flex;
  flex-direction: column;
  position: relative;
  padding-left: 24px;
}

.records-timeline::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background-color: var(--border-color);
}

.timeline-item {
  position: relative;
  padding-bottom: 1.5rem;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-dot {
  position: absolute;
  left: -21px;
  top: 4px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: var(--bg-primary);
  border: 3px solid var(--primary);
  transition: var(--transition-smooth);
}

.timeline-content {
  background-color: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  padding: 12px 16px;
}

.light-theme .timeline-content {
  background-color: rgba(0, 0, 0, 0.01);
}

.timeline-date {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 600;
  margin-bottom: 4px;
  display: block;
}

.timeline-text {
  font-size: 0.95rem;
  line-height: 1.4;
}

.timeline-empty {
  text-align: center;
  padding: 2rem;
  color: var(--text-muted);
  font-style: italic;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--border-radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  font-family: var(--font-sans);
  transition: var(--transition-smooth);
  border: 1px solid transparent;
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.85rem;
}

.btn-block {
  width: 100%;
}

.btn-primary {
  background: var(--primary-gradient);
  color: white;
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.25);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.35);
}

.btn-secondary {
  background-color: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  color: var(--text-main);
}

.light-theme .btn-secondary {
  background-color: rgba(0, 0, 0, 0.02);
}

.btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.08);
  border-color: var(--text-muted);
}

.light-theme .btn-secondary:hover {
  background-color: rgba(0, 0, 0, 0.04);
}

.btn-danger {
  background-color: var(--danger);
  color: white;
  box-shadow: 0 4px 12px rgba(239, 68, 68, 0.25);
}

.btn-danger:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(239, 68, 68, 0.35);
}

.btn-telegram {
  background: linear-gradient(135deg, #2aabee 0%, #229ed9 100%);
  color: white;
  box-shadow: 0 4px 14px rgba(42, 171, 238, 0.25);
}

.btn-telegram:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(42, 171, 238, 0.35);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
}

/* Modals */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  padding: 24px 16px;
  background-color: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(8px);
  display: none;
  align-items: flex-start;
  justify-content: center;
  overflow-y: auto;
  z-index: 100;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.modal.active {
  display: flex;
  opacity: 1;
}

.modal-content {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  width: 90%;
  max-width: 500px;
  max-height: calc(100vh - 48px);
  margin: auto 0;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  transform: scale(0.9);
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  display: flex;
  flex-direction: column;
}

.modal.active .modal-content {
  transform: scale(1);
}

.modal-header {
  padding: 1.5rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-header h2 {
  font-size: 1.25rem;
}

.close-modal-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.75rem;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.close-modal-btn:hover {
  color: var(--text-main);
}

.modal-body {
  padding: 1.5rem;
  overflow-y: auto;
}

.modal-body form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  margin-top: 0.5rem;
}

.subscription-entries {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.subscription-entry {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) 44px;
  gap: 0.75rem;
  align-items: end;
  padding: 0.9rem;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  background: var(--bg-card);
}

.subscription-entry-remove {
  width: 44px;
  height: 44px;
}

.subscription-entry-remove.hidden {
  visibility: hidden;
  pointer-events: none;
}

.subscription-add-btn {
  margin-top: 0.85rem;
}

@media (max-width: 680px) {
  .subscription-entry {
    grid-template-columns: 1fr;
  }

  .subscription-entry-remove {
    justify-self: start;
  }
}

.admin-accounts-list {
  border-top: 1px solid var(--border-color);
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.admin-account-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 14px;
  background-color: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
}

.admin-account-item strong {
  font-size: 0.95rem;
}

.admin-account-item span {
  color: var(--text-muted);
  font-size: 0.8rem;
}

/* QR Scanner Page */
.scanner-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  padding: 2rem;
  backdrop-filter: blur(16px);
}

@media (max-width: 900px) {
  .scanner-container {
    grid-template-columns: 1fr;
  }
}

.scanner-wrapper {
  position: relative;
  aspect-ratio: 4/3;
  border-radius: var(--border-radius-md);
  overflow: hidden;
  background-color: #000;
  border: 1px solid var(--border-color);
}

#reader {
  width: 100% !important;
  height: 100% !important;
  border: none !important;
}

#reader video {
  object-fit: cover !important;
}

/* Custom Scanning Overlay UI */
.scanner-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
}

.scanner-target {
  width: 60%;
  height: 60%;
  border: 2px solid rgba(255, 255, 255, 0.4);
  border-radius: var(--border-radius-sm);
  position: relative;
  box-shadow: 0 0 0 2000px rgba(0, 0, 0, 0.5); /* Dim outer area */
}

/* Corners for scanner target */
.scanner-target::before, .scanner-target::after {
  content: '';
  position: absolute;
  width: 20px;
  height: 20px;
  border-color: var(--secondary);
  border-style: solid;
}

/* Top corners */
.scanner-target::before {
  top: -2px;
  left: -2px;
  border-width: 3px 0 0 3px;
}
/* Bottom corners via logic */
.scanner-target::after {
  bottom: -2px;
  right: -2px;
  border-width: 0 3px 3px 0;
}

.scanner-laser {
  position: absolute;
  width: 60%;
  height: 2px;
  background-color: var(--secondary);
  box-shadow: 0 0 8px var(--secondary);
  animation: scan 2.5s ease-in-out infinite;
  z-index: 3;
}

.scanner-controls {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  justify-content: center;
}

.camera-selector-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.scanner-buttons {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.manual-input-box {
  border-top: 1px solid var(--border-color);
  padding-top: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.manual-text {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.manual-input-row {
  display: flex;
  gap: 10px;
}

.manual-input-row input {
  flex-grow: 1;
  padding: 10px 14px;
  background-color: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  color: var(--text-main);
  outline: none;
  font-family: monospace;
  font-weight: 700;
  text-transform: uppercase;
}

.light-theme .manual-input-row input {
  background-color: rgba(0, 0, 0, 0.01);
}

@media (max-width: 900px) {
  .sidebar {
    transform: translateX(-100%);
    box-shadow: none;
  }

  .app-container.sidebar-open .sidebar {
    transform: translateX(0);
    box-shadow: var(--shadow-lg);
  }

  .app-container.sidebar-open .sidebar-backdrop {
    opacity: 1;
    pointer-events: auto;
  }

  .main-content {
    margin-left: 0;
    width: 100%;
    padding: 1.25rem;
    gap: 1.5rem;
  }

  .top-header {
    gap: 0.85rem;
    align-items: stretch;
  }

  .mobile-menu-toggle {
    display: inline-flex;
  }

  .header-search {
    max-width: none;
  }

  .header-actions {
    gap: 0.75rem;
  }

  .view-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .welcome-banner,
  .widget-card,
  .detail-card,
  .form-container,
  .scanner-container,
  .table-container {
    padding: 1.25rem;
  }

  .welcome-banner {
    padding: 1.75rem 1.25rem;
  }

  .welcome-banner h1 {
    font-size: 1.7rem;
  }

  .stats-grid {
    grid-template-columns: 1fr;
  }

  .stat-card {
    padding: 1.25rem;
  }

  .client-badge,
  .detail-card-header {
    align-items: flex-start;
  }

  .detail-card-header {
    flex-direction: column;
  }

  .add-record-form,
  .manual-input-row {
    flex-direction: column;
  }

  .add-record-form .btn,
  .manual-input-row .btn,
  .scanner-buttons .btn {
    width: 100%;
  }
}

@media (max-width: 760px) {
  .top-header {
    flex-wrap: wrap;
  }

  .header-search {
    order: 3;
    width: 100%;
  }

  .header-actions {
    margin-left: auto;
  }

  .widget-header,
  .recent-client-item {
    flex-direction: column;
    align-items: flex-start;
  }

  .client-item-meta {
    align-items: flex-start;
    width: 100%;
  }

  .clients-table,
  .clients-table thead,
  .clients-table tbody,
  .clients-table th,
  .clients-table td,
  .clients-table tr {
    display: block;
  }

  .clients-table thead {
    display: none;
  }

  .clients-table tbody {
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
  }

  .clients-table tbody tr {
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 0.25rem 0;
    background: rgba(255, 255, 255, 0.02);
  }

  .light-theme .clients-table tbody tr {
    background: rgba(0, 0, 0, 0.015);
  }

  .clients-table td {
    border-bottom: 1px solid var(--border-color);
    padding: 0.85rem 1rem;
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
  }

  .clients-table td:last-child {
    border-bottom: none;
  }

  .clients-table td::before {
    content: attr(data-label);
    font-size: 0.76rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text-muted);
    flex: 0 0 42%;
    max-width: 42%;
  }

  .clients-table td > * {
    min-width: 0;
  }

  .action-cell {
    justify-content: flex-end;
  }

  .action-cell::before {
    align-self: center;
  }
}

@media (max-width: 560px) {
  .auth-screen,
  .main-content {
    padding: 1rem;
  }

  .auth-card,
  .form-container,
  .detail-card,
  .scanner-container,
  .table-container,
  .widget-card {
    padding: 1rem;
  }

  .top-header {
    gap: 0.75rem;
  }

  .header-actions {
    width: 100%;
    justify-content: space-between;
  }

  .view-header h1,
  .welcome-banner h1 {
    font-size: 1.45rem;
  }

  .welcome-banner p,
  .view-header p {
    font-size: 0.92rem;
  }

  .stat-card {
    flex-direction: column;
    align-items: flex-start;
  }

  .client-badge {
    flex-direction: column;
  }

  .qr-code-container img {
    width: min(100%, 220px);
    height: auto;
  }

  .modal {
    padding: 12px;
  }

  .modal-content {
    width: 100%;
    max-height: calc(100vh - 24px);
  }

  .modal-header,
  .modal-body {
    padding: 1rem;
  }

  .modal-actions,
  .form-actions {
    flex-direction: column-reverse;
  }

  .modal-actions .btn,
  .form-actions .btn {
    width: 100%;
  }

  .clients-table td {
    flex-direction: column;
    gap: 0.5rem;
  }

  .clients-table td::before {
    flex: none;
    max-width: none;
  }

  .action-cell {
    justify-content: stretch;
  }

  .action-cell .btn {
    flex: 1 1 auto;
  }
}

/* Keyframes and Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
  0% { transform: scale(0.95); opacity: 0.5; }
  50% { transform: scale(1.15); opacity: 0.8; }
  100% { transform: scale(0.95); opacity: 0.5; }
}

@keyframes scan {
  0%, 100% { top: 20%; }
  50% { top: 80%; }
}

/* Print View Override */
@media print {
  body {
    background: white;
    color: black;
    font-size: 12pt;
  }
  
  .sidebar, .top-header, .btn, .icon-btn, .qr-desc, .add-record-form, .records-timeline, .form-actions, .glow-bg {
    display: none !important;
  }
  
  .main-content {
    margin-left: 0 !important;
    padding: 0 !important;
  }
  
  .content-view {
    display: none !important;
  }
  
  #view-client-details {
    display: block !important;
  }
  
  .client-details-grid {
    display: block !important;
  }
  
  .detail-card {
    border: 1px solid #ccc !important;
    background: none !important;
    box-shadow: none !important;
    margin-bottom: 20px !important;
    page-break-inside: avoid;
  }
  
  .qr-card {
    display: flex !important;
    flex-direction: column !important;
    align-items: center !important;
  }
  
  .qr-code-container {
    border: 1px solid #000 !important;
    box-shadow: none !important;
  }
  
  .badge-icon {
    display: none !important;
  }
}