/* ==========================================================================
   Commercial Multi-Tenant LMS SaaS & Channel Referral Platform Stylesheet
   ========================================================================== */

:root {
  --bg-primary: #0b0f19;
  --bg-secondary: #111827;
  --bg-card: rgba(17, 24, 39, 0.75);
  --bg-card-hover: rgba(31, 41, 55, 0.85);
  --bg-glass: rgba(255, 255, 255, 0.03);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-highlight: rgba(99, 102, 241, 0.4);

  --accent-primary: #6366f1;
  --accent-secondary: #8b5cf6;
  --accent-success: #10b981;
  --accent-warning: #f59e0b;
  --accent-danger: #ef4444;
  --accent-info: #06b6d4;

  --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
  --gradient-success: linear-gradient(135deg, #10b981 0%, #059669 100%);
  --gradient-gold: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
  --gradient-purple: linear-gradient(135deg, #ec4899 0%, #8b5cf6 100%);

  --text-primary: #f9fafb;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;

  --sidebar-width: 280px;
  --header-height: 70px;
  --role-bar-height: 48px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --shadow-glow: 0 0 25px rgba(99, 102, 241, 0.25);
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  overflow-x: hidden;
  min-height: 100vh;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Outfit', sans-serif;
  font-weight: 600;
  letter-spacing: -0.02em;
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.3);
}

/* App Shell Layout */
#app-shell {
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

/* Role Switcher Top Bar */
.role-switcher-bar {
  height: var(--role-bar-height);
  background: #060913;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.5rem;
  z-index: 100;
  font-size: 0.85rem;
}

.role-switcher-title {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--accent-primary);
  font-weight: 600;
}
.role-switcher-title i {
  font-size: 1.1rem;
}

.role-pills {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  overflow-x: auto;
}

.role-pill {
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
  font-size: 0.78rem;
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.role-pill:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
}

.role-pill.active {
  background: var(--accent-primary);
  color: #fff;
  border-color: var(--accent-primary);
  box-shadow: 0 0 12px rgba(99, 102, 241, 0.4);
}

/* Mode Switcher Badge (School vs Coaching) */
.mode-badge {
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  cursor: pointer;
}
.mode-badge.school {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-success);
  border: 1px solid rgba(16, 185, 129, 0.3);
}
.mode-badge.coaching {
  background: rgba(139, 92, 246, 0.15);
  color: var(--accent-secondary);
  border: 1px solid rgba(139, 92, 246, 0.3);
}

/* Main Layout Wrapper */
.main-wrapper {
  display: flex;
  flex: 1;
  overflow: hidden;
  position: relative;
}

/* Sidebar Navigation */
.sidebar {
  width: var(--sidebar-width);
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 1.25rem;
  z-index: 90;
  transition: var(--transition);
}

.brand-header {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 1.25rem;
}

.brand-logo {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.3rem;
  box-shadow: var(--shadow-glow);
}

.brand-info h2 {
  font-size: 1.15rem;
  color: var(--text-primary);
  line-height: 1.2;
}

.brand-info p {
  font-size: 0.72rem;
  color: var(--accent-info);
  font-weight: 500;
}

/* Navigation Links */
.nav-menu {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  overflow-y: auto;
  flex: 1;
}

.nav-section-label {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin: 0.85rem 0 0.35rem 0.5rem;
  font-weight: 600;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: var(--transition);
  cursor: pointer;
  position: relative;
}

.nav-item:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
}

.nav-item.active {
  background: rgba(99, 102, 241, 0.12);
  color: var(--accent-primary);
  border: 1px solid rgba(99, 102, 241, 0.3);
  font-weight: 600;
}

.nav-item.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 20%;
  height: 60%;
  width: 4px;
  border-radius: 0 4px 4px 0;
  background: var(--accent-primary);
}

.nav-item .badge {
  margin-left: auto;
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-full);
  font-size: 0.7rem;
  font-weight: 600;
}

.badge-primary { background: rgba(99, 102, 241, 0.2); color: var(--accent-primary); }
.badge-success { background: rgba(16, 185, 129, 0.2); color: var(--accent-success); }
.badge-warning { background: rgba(245, 158, 11, 0.2); color: var(--accent-warning); }

/* Tenant Info Footer in Sidebar */
.tenant-footer {
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.tenant-avatar {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: var(--gradient-purple);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
}

.tenant-meta h4 {
  font-size: 0.85rem;
  color: var(--text-primary);
}
.tenant-meta p {
  font-size: 0.72rem;
  color: var(--text-muted);
}

/* Content Workspace */
.content-workspace {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--bg-primary);
}

/* Header Navbar */
.header-navbar {
  height: var(--header-height);
  border-bottom: 1px solid var(--border-color);
  background: rgba(17, 24, 39, 0.5);
  backdrop-filter: blur(12px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.75rem;
}

.header-title-box h1 {
  font-size: 1.35rem;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.header-title-box p {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.search-bar {
  position: relative;
  width: 260px;
}
.search-bar input {
  width: 100%;
  padding: 0.55rem 1rem 0.55rem 2.4rem;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  font-size: 0.82rem;
  outline: none;
  transition: var(--transition);
}
.search-bar input:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 10px rgba(99, 102, 241, 0.2);
}
.search-bar i {
  position: absolute;
  left: 0.9rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* Buttons */
.btn {
  padding: 0.55rem 1.15rem;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  border: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: var(--transition);
  text-decoration: none;
}

.btn-primary {
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.45);
}

.btn-success {
  background: var(--gradient-success);
  color: #fff;
  box-shadow: 0 4px 15px rgba(16, 185, 129, 0.3);
}
.btn-success:hover {
  transform: translateY(-1px);
}

.btn-glass {
  background: rgba(255, 255, 255, 0.07);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}
.btn-glass:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.2);
}

/* Main View Container */
.main-view-container {
  flex: 1;
  overflow-y: auto;
  padding: 1.75rem;
}

/* Grid Views */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1.25rem;
  margin-bottom: 1.75rem;
}

.stat-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: var(--transition);
}
.stat-card:hover {
  border-color: var(--border-highlight);
  transform: translateY(-2px);
  box-shadow: var(--shadow-card);
}

.stat-info h3 {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
  margin-bottom: 0.35rem;
}

.stat-info .stat-value {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-primary);
  font-family: 'Outfit', sans-serif;
}

.stat-info .stat-sub {
  font-size: 0.72rem;
  color: var(--accent-success);
  display: flex;
  align-items: center;
  gap: 0.25rem;
  margin-top: 0.25rem;
}

.stat-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
}
.icon-purple { background: rgba(139, 92, 246, 0.15); color: var(--accent-secondary); }
.icon-indigo { background: rgba(99, 102, 241, 0.15); color: var(--accent-primary); }
.icon-emerald { background: rgba(16, 185, 129, 0.15); color: var(--accent-success); }
.icon-amber { background: rgba(245, 158, 11, 0.15); color: var(--accent-warning); }

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

.card-panel {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  backdrop-filter: blur(12px);
  margin-bottom: 1.5rem;
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-color);
}

.card-title {
  font-size: 1.1rem;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Custom Data Tables */
.table-responsive {
  width: 100%;
  overflow-x: auto;
}

.custom-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  text-align: left;
}

.custom-table th {
  padding: 0.75rem 1rem;
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--border-color);
}

.custom-table td {
  padding: 0.9rem 1rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  color: var(--text-secondary);
}

.custom-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
  color: var(--text-primary);
}

/* Referral Bonus Calculator Widget */
.calc-box {
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--border-highlight);
  border-radius: var(--radius-md);
  padding: 1.25rem;
}

.calc-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.6rem 0;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.08);
  font-size: 0.88rem;
}
.calc-row:last-child {
  border-bottom: none;
}

.calc-label {
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.calc-value {
  font-weight: 700;
  font-family: 'Outfit', sans-serif;
  color: var(--text-primary);
}

/* Course Player & Lesson Layout */
.course-player-grid {
  display: grid;
  grid-template-columns: 2.2fr 1fr;
  gap: 1.5rem;
}

.video-container {
  width: 100%;
  aspect-ratio: 16/9;
  background: #000;
  border-radius: var(--radius-md);
  overflow: hidden;
  position: relative;
  box-shadow: var(--shadow-card);
}

.video-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #1e1b4b 0%, #0f172a 100%);
  color: var(--accent-primary);
  gap: 1rem;
}

.video-placeholder i {
  font-size: 3.5rem;
  filter: drop-shadow(0 0 15px rgba(99, 102, 241, 0.5));
}

.lesson-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  max-height: 480px;
  overflow-y: auto;
}

.lesson-item {
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  transition: var(--transition);
  font-size: 0.85rem;
}
.lesson-item:hover {
  background: rgba(99, 102, 241, 0.1);
  border-color: var(--accent-primary);
}
.lesson-item.active {
  background: rgba(99, 102, 241, 0.2);
  border-color: var(--accent-primary);
  font-weight: 600;
}

/* Exam Testing Window */
.exam-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
  max-width: 850px;
  margin: 0 auto;
}

.question-option {
  padding: 1rem 1.25rem;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  margin-bottom: 0.75rem;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 0.85rem;
}
.question-option:hover {
  background: rgba(99, 102, 241, 0.1);
  border-color: rgba(99, 102, 241, 0.4);
}
.question-option.selected {
  background: rgba(99, 102, 241, 0.25);
  border-color: var(--accent-primary);
  font-weight: 600;
}

/* Modal Dialog */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.modal-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.modal-content {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  width: 90%;
  max-width: 620px;
  padding: 2rem;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.7);
  transform: scale(0.95);
  transition: transform 0.3s ease;
}
.modal-overlay.open .modal-content {
  transform: scale(1);
}

/* Status Badges */
.status-tag {
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  font-size: 0.72rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}
.status-tag.active { background: rgba(16, 185, 129, 0.15); color: var(--accent-success); }
.status-tag.pending { background: rgba(245, 158, 11, 0.15); color: var(--accent-warning); }
.status-tag.paid { background: rgba(99, 102, 241, 0.15); color: var(--accent-primary); }

/* QR Code Display Card */
.qr-card {
  background: #fff;
  padding: 1rem;
  border-radius: var(--radius-md);
  display: inline-block;
  text-align: center;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
}
.qr-card img {
  width: 140px;
  height: 140px;
}

/* Animations */
@keyframes pulseGlow {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 0.8; }
}

.pulse-badge {
  animation: pulseGlow 2s infinite ease-in-out;
}