/* TESTAMIND Academy — Global Styles */

:root {
  --bg: #0a0a14;
  --bg-surface: #111827;
  --bg-card: #1a1a2e;
  --bg-hover: #1f2937;
  --border: #2a2a40;
  --text: #ececec;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --primary-bg: rgba(59, 130, 246, 0.1);
  --secondary: #8b5cf6;
  --success: #22c55e;
  --warning: #f59e0b;
  --danger: #ef4444;
  --accent-cyan: #06b6d4;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --shadow: 0 4px 24px rgba(0,0,0,0.3);
  --transition: 0.2s ease;
}

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

body {
  font-family: 'Heebo', 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  direction: rtl;
}

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

/* Navbar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 10, 20, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
}
.navbar-inner {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 24px;
  height: 64px;
}
.navbar-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: var(--text);
  font-weight: 700;
  font-size: 1.2rem;
  white-space: nowrap;
}
.brand-icon { font-size: 1.5rem; }
.brand-accent { color: var(--primary); }
.navbar-search { flex: 1; max-width: 500px; }
.search-input {
  width: 100%;
  padding: 8px 16px;
  border-radius: 24px;
  border: 1px solid var(--border);
  background: var(--bg-surface);
  color: var(--text);
  font-family: inherit;
  font-size: 0.9rem;
  outline: none;
  transition: border var(--transition);
}
.search-input:focus { border-color: var(--primary); }
.navbar-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Main content */
.main-content {
  max-width: 1400px;
  margin: 0 auto;
  padding: 24px;
  min-height: calc(100vh - 64px);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}
.btn:hover { background: var(--bg-hover); }
.btn-primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-success { background: var(--success); border-color: var(--success); color: #fff; }
.btn-danger { background: var(--danger); border-color: var(--danger); color: #fff; }
.btn-lg { padding: 14px 32px; font-size: 1.1rem; border-radius: var(--radius); }
.btn-sm { padding: 6px 14px; font-size: 0.85rem; }
.btn-outline { border-color: var(--primary); color: var(--primary); }
.btn-outline:hover { background: var(--primary-bg); }

/* Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
}
.card:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.card-body { padding: 16px; }

/* Course card */
.course-card { cursor: pointer; }
.course-card .card-thumb {
  height: 160px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  position: relative;
}
.course-card .card-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.course-card .card-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 4px;
  line-height: 1.4;
}
.course-card .card-creator {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
}
.course-card .card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--text-muted);
}
.course-card .card-rating {
  color: var(--warning);
  font-weight: 600;
}
.course-card .card-price {
  font-size: 1rem;
  font-weight: 700;
  color: var(--success);
  margin-top: 8px;
}
.card-badge {
  position: absolute;
  top: 8px;
  left: 8px;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.7rem;
  font-weight: 600;
  background: var(--success);
  color: #fff;
}

/* Grid */
.grid { display: grid; gap: 20px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 1100px) { .grid-4 { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 800px) { .grid-4, .grid-3 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 500px) { .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; } }

/* Stats bar */
.stats-bar {
  display: flex;
  gap: 16px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}
.stat-card {
  flex: 1;
  min-width: 140px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  text-align: center;
}
.stat-value { font-size: 2rem; font-weight: 700; color: var(--primary); }
.stat-label { font-size: 0.85rem; color: var(--text-secondary); margin-top: 4px; }

/* Section titles */
.section-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Category chips */
.chips { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 24px; }
.chip {
  padding: 6px 16px;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: var(--bg-surface);
  color: var(--text-secondary);
  font-size: 0.85rem;
  cursor: pointer;
  transition: all var(--transition);
}
.chip:hover, .chip.active { background: var(--primary-bg); border-color: var(--primary); color: var(--primary); }

/* Forms */
.form-group { margin-bottom: 16px; }
.form-label { display: block; font-size: 0.85rem; color: var(--text-secondary); margin-bottom: 6px; font-weight: 500; }
.form-input, .form-textarea {
  width: 100%;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-surface);
  color: var(--text);
  font-family: inherit;
  font-size: 0.9rem;
  outline: none;
  transition: border var(--transition);
}
.form-input:focus, .form-textarea:focus { border-color: var(--primary); }
.form-textarea { resize: vertical; min-height: 80px; }

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
}
.modal {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  width: 90%;
  max-width: 480px;
  max-height: 90vh;
  overflow-y: auto;
}
.modal-title { font-size: 1.3rem; font-weight: 700; margin-bottom: 16px; }

/* Toast */
.toast-container {
  position: fixed;
  top: 80px;
  left: 24px;
  z-index: 300;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.toast {
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 0.9rem;
  box-shadow: var(--shadow);
  animation: slideIn 0.3s ease;
}
.toast.success { border-color: var(--success); }
.toast.error { border-color: var(--danger); }
@keyframes slideIn { from { opacity: 0; transform: translateX(-20px); } to { opacity: 1; transform: translateX(0); } }

/* Progress bar */
.progress-bar {
  height: 6px;
  background: var(--bg-surface);
  border-radius: 3px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  border-radius: 3px;
  transition: width 0.3s ease;
}

/* Avatar */
.avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
  color: #fff;
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: 64px 24px;
  color: var(--text-muted);
}
.empty-state .empty-icon { font-size: 3rem; margin-bottom: 12px; }

/* Loading */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 48px;
}
.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Page header */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 16px;
}
.page-title { font-size: 1.8rem; font-weight: 700; }
.page-subtitle { color: var(--text-secondary); font-size: 0.95rem; margin-top: 4px; }

/* Tabs */
.tabs { display: flex; gap: 0; border-bottom: 1px solid var(--border); margin-bottom: 24px; }
.tab {
  padding: 12px 20px;
  cursor: pointer;
  color: var(--text-muted);
  font-weight: 500;
  border-bottom: 2px solid transparent;
  transition: all var(--transition);
}
.tab:hover { color: var(--text); }
.tab.active { color: var(--primary); border-bottom-color: var(--primary); }
.tab { background: none; border: none; border-bottom: 2px solid transparent; font-family: inherit; font-size: 0.9rem; }

/* Auth pages */
.auth-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
}
.auth-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
  width: 100%;
  max-width: 440px;
}
.auth-header { text-align: center; margin-bottom: 28px; }
.auth-header h2 { font-size: 1.6rem; font-weight: 700; margin-bottom: 8px; }
.auth-header p { color: var(--text-secondary); font-size: 0.9rem; }
.auth-form .form-group { margin-bottom: 18px; }
.auth-form label { display: block; font-size: 0.85rem; color: var(--text-secondary); margin-bottom: 6px; font-weight: 500; }
.auth-form input[type="email"],
.auth-form input[type="password"],
.auth-form input[type="text"] {
  width: 100%;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-surface);
  color: var(--text);
  font-family: inherit;
  font-size: 0.95rem;
  outline: none;
  transition: border var(--transition);
}
.auth-form input:focus { border-color: var(--primary); }
.btn-full { width: 100%; justify-content: center; }
.auth-footer { text-align: center; margin-top: 20px; font-size: 0.85rem; color: var(--text-muted); }

/* Role selector */
.role-selector { display: flex; gap: 12px; }
.role-option {
  flex: 1;
  padding: 16px;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition);
  background: var(--bg-surface);
}
.role-option:hover { border-color: var(--primary); }
.role-option.selected { border-color: var(--primary); background: var(--primary-bg); }
.role-option input[type="radio"] { display: none; }
.role-icon { font-size: 2rem; margin-bottom: 6px; }
.role-label { font-weight: 600; font-size: 0.9rem; }
.role-desc { font-size: 0.75rem; color: var(--text-muted); margin-top: 4px; }

/* Course grid */
.course-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
@media (max-width: 1100px) { .course-grid { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 800px) { .course-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 500px) { .course-grid { grid-template-columns: 1fr; } }

.course-card {
  display: block;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
  text-decoration: none;
  color: var(--text);
}
.course-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); color: var(--text); }
.course-thumb {
  height: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}
.course-thumb img { width: 100%; height: 100%; object-fit: cover; }
.thumb-text { color: #fff; font-weight: 700; font-size: 1rem; text-align: center; padding: 12px; text-shadow: 0 2px 4px rgba(0,0,0,0.4); }
.course-card-body { padding: 14px; }
.course-card-title { font-size: 0.95rem; font-weight: 600; margin-bottom: 6px; line-height: 1.4; }
.course-card-subtitle { font-size: 0.8rem; color: var(--text-secondary); margin-bottom: 8px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.course-card-meta { display: flex; align-items: center; gap: 8px; font-size: 0.8rem; color: var(--text-muted); margin-bottom: 8px; flex-wrap: wrap; }
.course-rating { color: var(--warning); }
.creator-name { color: var(--text-secondary); }
.course-card-footer { display: flex; align-items: center; justify-content: space-between; }
.course-price { font-size: 1rem; font-weight: 700; color: var(--success); }
.course-price.free { color: var(--accent-cyan); }
.course-stats { font-size: 0.8rem; color: var(--text-muted); }

/* Section header */
.section { margin-bottom: 32px; }
.section-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 20px; }
.section-header h2 { font-size: 1.4rem; font-weight: 700; }

/* Chip group */
.chip-group { display: flex; gap: 8px; flex-wrap: wrap; }
.chip-count { font-size: 0.7rem; opacity: 0.7; margin-right: 4px; }

/* Stat items (for homepage) */
.stats-bar { display: flex; gap: 16px; flex-wrap: wrap; justify-content: center; }
.stat-item { text-align: center; padding: 20px 32px; background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); min-width: 120px; }
.stat-item .stat-value { font-size: 2rem; font-weight: 700; color: var(--primary); }
.stat-item .stat-label { font-size: 0.85rem; color: var(--text-secondary); margin-top: 4px; }

/* Catalog layout */
.catalog-page { }
.catalog-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 24px; flex-wrap: wrap; gap: 12px; }
.catalog-header h1 { font-size: 1.6rem; font-weight: 700; }
.catalog-filters { display: flex; gap: 8px; }
.form-select {
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-surface);
  color: var(--text);
  font-family: inherit;
  font-size: 0.85rem;
  outline: none;
  cursor: pointer;
}
.catalog-layout { display: grid; grid-template-columns: 200px 1fr; gap: 24px; }
@media (max-width: 800px) { .catalog-layout { grid-template-columns: 1fr; } .catalog-sidebar { display: none; } }
.catalog-sidebar h3 { font-size: 1rem; margin-bottom: 12px; color: var(--text-secondary); }
.cat-filter-item {
  display: block;
  padding: 8px 12px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  margin-bottom: 2px;
}
.cat-filter-item:hover { background: var(--bg-hover); color: var(--text); }
.cat-filter-item.active { background: var(--primary-bg); color: var(--primary); }

/* Breadcrumb */
.breadcrumb { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 16px; }
.breadcrumb a { color: var(--text-secondary); }
.breadcrumb a:hover { color: var(--primary); }

/* Course detail */
.course-title { font-size: 2rem; font-weight: 800; margin-bottom: 8px; }
.course-subtitle { font-size: 1.1rem; color: var(--text-secondary); margin-bottom: 16px; }
.course-meta-row { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; font-size: 0.85rem; color: var(--text-secondary); margin-bottom: 24px; }
.meta-item { display: flex; align-items: center; gap: 4px; }
.course-description { margin-bottom: 32px; }
.course-description h2 { font-size: 1.2rem; font-weight: 600; margin-bottom: 12px; }
.course-description p { color: var(--text-secondary); line-height: 1.7; }
.syllabus h2 { font-size: 1.2rem; font-weight: 600; margin-bottom: 8px; }
.syllabus-summary { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 16px; }
.module-lesson-count { margin-right: auto; font-size: 0.8rem; color: var(--text-muted); font-weight: 400; }
.module-toggle { font-size: 0.7rem; transition: transform var(--transition); }
.syllabus-module.collapsed .lesson-list { display: none; }
.syllabus-module.collapsed .module-toggle { transform: rotate(-90deg); }
.reviews-section { margin-top: 32px; }
.reviews-section h2 { font-size: 1.2rem; font-weight: 600; margin-bottom: 16px; }
.avatar-sm { width: 28px; height: 28px; font-size: 0.7rem; }

/* Dashboard */
.dashboard-page { }
.dashboard-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 24px; flex-wrap: wrap; gap: 12px; }
.dashboard-header h1 { font-size: 1.6rem; font-weight: 700; }
.dashboard-tabs { display: flex; gap: 0; border-bottom: 1px solid var(--border); margin-bottom: 24px; }

/* Enrolled cards (student dashboard) */
.my-courses-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
@media (max-width: 900px) { .my-courses-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 500px) { .my-courses-grid { grid-template-columns: 1fr; } }

.enrolled-card {
  display: block;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
  text-decoration: none;
  color: var(--text);
}
.enrolled-card:hover { transform: translateY(-2px); box-shadow: var(--shadow); color: var(--text); }
.enrolled-thumb {
  height: 140px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}
.enrolled-thumb img { width: 100%; height: 100%; object-fit: cover; }
.completed-badge {
  position: absolute;
  top: 8px;
  left: 8px;
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--success);
  color: #fff;
}
.enrolled-body { padding: 14px; }
.enrolled-title { font-size: 0.95rem; font-weight: 600; margin-bottom: 10px; }
.progress-bar-container { display: flex; align-items: center; gap: 10px; }
.progress-bar-container .progress-bar { flex: 1; }
.progress-text { font-size: 0.8rem; color: var(--text-muted); white-space: nowrap; }
.enrolled-meta { display: flex; align-items: center; justify-content: space-between; margin-top: 10px; font-size: 0.8rem; color: var(--text-muted); }
.continue-label { color: var(--primary); font-weight: 500; }

/* Loading state */
.loading-state { text-align: center; padding: 48px; color: var(--text-muted); }

/* Btn ghost */
.btn-ghost { border: none; background: transparent; color: var(--text-secondary); }
.btn-ghost:hover { color: var(--text); background: var(--bg-hover); }

/* ═══════════════════════════════════════ */
/* Settings Page                           */
/* ═══════════════════════════════════════ */
.settings-page { max-width: 900px; margin: 0 auto; }
.settings-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
@media (max-width: 800px) { .settings-grid { grid-template-columns: 1fr; } }

.settings-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}
.settings-card-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

.avatar-section {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}
.avatar-preview {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  font-weight: 700;
  color: #fff;
  overflow: hidden;
  flex-shrink: 0;
}
.avatar-preview img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ═══════════════════════════════════════ */
/* Instructor Sidebar Card (player+preview)*/
/* ═══════════════════════════════════════ */
.instructor-sidebar-card {
  padding: 16px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-card);
  text-align: center;
}
.isc-avatar {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  font-weight: 700;
  color: #fff;
  margin: 0 auto 10px;
  overflow: hidden;
}
.isc-avatar img { width: 100%; height: 100%; object-fit: cover; }
.isc-info { margin-bottom: 12px; }
.isc-name { font-weight: 700; font-size: 0.95rem; }
.isc-brand { font-size: 0.8rem; color: var(--primary); font-weight: 600; margin-top: 2px; }
.isc-title { font-size: 0.75rem; color: var(--text-muted); margin-top: 2px; }
.isc-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-size: 0.75rem;
  color: var(--text-secondary);
}
.isc-stat strong { color: var(--text); font-weight: 700; }
.isc-stat-tag {
  background: var(--success);
  color: #fff;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 0.7rem;
  font-weight: 600;
}
.isc-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-top: 10px;
  font-size: 1rem;
}
.isc-links a { text-decoration: none; opacity: 0.7; transition: opacity var(--transition); }
.isc-links a:hover { opacity: 1; }

/* ═══════════════════════════════════════ */
/* Lesson Content Tabs (Quiz / Exercises / Flashcards) */
/* ═══════════════════════════════════════ */
.lesson-content-tabs {
  margin-top: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.lct-header {
  display: flex;
  border-bottom: 1px solid var(--border);
  background: var(--bg-surface);
}
.lct-tab {
  flex: 1;
  padding: 10px 16px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  text-align: center;
}
.lct-tab:hover { color: var(--text); background: var(--bg-hover); }
.lct-tab.active {
  color: var(--primary);
  border-bottom: 2px solid var(--primary);
  background: rgba(59, 130, 246, 0.05);
}
.lct-body { padding: 20px; min-height: 200px; }
.lct-empty { text-align: center; color: var(--text-muted); padding: 40px 20px; font-size: 0.9rem; }
.lct-loading { text-align: center; color: var(--text-muted); padding: 40px; }

/* Content badge in studio */
.content-badge {
  display: inline-block;
  font-size: 0.7rem;
  margin-right: 4px;
  background: rgba(59, 130, 246, 0.15);
  color: var(--primary);
  padding: 1px 5px;
  border-radius: 4px;
}

/* ═══════════════════════════════════════ */
/* Quiz Styles */
/* ═══════════════════════════════════════ */
.quiz-container { max-width: 700px; }
.quiz-title { font-size: 1.1rem; margin-bottom: 20px; color: var(--text); }
.quiz-question { margin-bottom: 24px; padding-bottom: 20px; border-bottom: 1px solid var(--border); }
.quiz-question:last-of-type { border-bottom: none; }
.quiz-q-text { font-size: 0.95rem; margin-bottom: 12px; line-height: 1.6; color: var(--text); }
.quiz-options { display: flex; flex-direction: column; gap: 8px; }
.quiz-option {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
  font-size: 0.88rem;
  color: var(--text-secondary);
}
.quiz-option:hover { background: var(--bg-hover); border-color: var(--primary); }
.quiz-option.selected { background: rgba(59, 130, 246, 0.1); border-color: var(--primary); color: var(--text); }
.quiz-option.correct { background: rgba(34, 197, 94, 0.15); border-color: var(--success); color: var(--success); }
.quiz-option.wrong { background: rgba(239, 68, 68, 0.1); border-color: var(--danger); color: var(--danger); }
.quiz-option input[type="radio"] { accent-color: var(--primary); }
.quiz-explanation {
  margin-top: 10px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  line-height: 1.5;
}
.quiz-explanation.correct { background: rgba(34, 197, 94, 0.1); color: var(--success); }
.quiz-explanation.wrong { background: rgba(239, 68, 68, 0.08); color: #fca5a5; }
.quiz-actions { display: flex; align-items: center; gap: 12px; margin-top: 16px; }
.quiz-score {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--primary);
  background: rgba(59, 130, 246, 0.1);
  padding: 8px 20px;
  border-radius: var(--radius-sm);
}

/* ═══════════════════════════════════════ */
/* Exercises Styles */
/* ═══════════════════════════════════════ */
.exercises-container { max-width: 700px; }
.exercises-title { font-size: 1.1rem; margin-bottom: 20px; color: var(--text); }
.exercise-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 16px;
}
.exercise-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}
.exercise-num {
  width: 28px; height: 28px;
  display: flex; align-items: center; justify-content: center;
  background: var(--primary-bg);
  color: var(--primary);
  font-weight: 700;
  font-size: 0.85rem;
  border-radius: 50%;
}
.exercise-title { flex: 1; font-weight: 600; font-size: 0.95rem; color: var(--text); }
.exercise-diff {
  font-size: 0.72rem;
  padding: 2px 8px;
  border-radius: 10px;
  font-weight: 500;
}
.exercise-diff-easy { background: rgba(34, 197, 94, 0.15); color: var(--success); }
.exercise-diff-medium { background: rgba(245, 158, 11, 0.15); color: var(--warning); }
.exercise-diff-hard { background: rgba(239, 68, 68, 0.15); color: var(--danger); }
.exercise-desc { font-size: 0.88rem; color: var(--text-secondary); margin-bottom: 8px; line-height: 1.5; }
.exercise-instructions {
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-bottom: 12px;
  padding: 8px 12px;
  background: var(--bg-hover);
  border-radius: var(--radius-sm);
  line-height: 1.5;
}
.exercise-code-section { margin-bottom: 12px; }
.code-label { font-size: 0.75rem; color: var(--text-muted); margin-bottom: 4px; font-weight: 500; }
.exercise-code {
  background: #0d1117;
  color: #c9d1d9;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  font-family: 'Fira Code', 'Consolas', monospace;
  font-size: 0.82rem;
  line-height: 1.6;
  overflow-x: auto;
  white-space: pre-wrap;
  border: 1px solid #21262d;
}
.exercise-code.solution { border-color: var(--success); }
.exercise-hints {
  margin-bottom: 12px;
}
.exercise-hints summary {
  cursor: pointer;
  font-size: 0.82rem;
  color: var(--warning);
  padding: 6px 0;
}
.exercise-hints ul {
  padding: 8px 20px;
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.7;
}
.exercise-solution-toggle { margin-top: 8px; }
.exercise-solution { margin-top: 8px; }

/* ═══════════════════════════════════════ */
/* Flashcards Styles */
/* ═══════════════════════════════════════ */
.flashcards-container { max-width: 500px; margin: 0 auto; text-align: center; }
.flashcards-title { font-size: 1.1rem; margin-bottom: 20px; color: var(--text); }
.flashcard-wrapper { perspective: 1000px; margin-bottom: 16px; }
.flashcard {
  width: 100%;
  height: 220px;
  position: relative;
  cursor: pointer;
  transform-style: preserve-3d;
  transition: transform 0.5s ease;
}
.flashcard.flipped { transform: rotateY(180deg); }
.flashcard-front, .flashcard-back {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 24px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}
.flashcard-front {
  background: linear-gradient(135deg, var(--bg-surface), var(--bg-card));
}
.flashcard-back {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(139, 92, 246, 0.1));
  transform: rotateY(180deg);
  border-color: var(--primary);
}
.flashcard-category {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  margin-bottom: 12px;
  font-weight: 500;
}
.flashcard-text {
  font-size: 1.1rem;
  line-height: 1.6;
  color: var(--text);
}
.flashcard-hint {
  position: absolute;
  bottom: 10px;
  font-size: 0.7rem;
  color: var(--text-muted);
}
.flashcard-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 12px;
}
.flashcard-counter { font-size: 0.9rem; color: var(--text-secondary); font-weight: 500; }
.flashcard-progress {
  display: flex;
  justify-content: center;
  gap: 4px;
}
.fc-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--border);
  transition: all var(--transition);
}
.fc-dot.active { background: var(--primary); transform: scale(1.3); }
.fc-dot.seen { background: var(--text-muted); }