/* ============================================
   CYBERSOUL.AI — Learn Platform Stylesheet
   Shares CSS variables from style.css (:root)
   Class names match what learn.js generates.
   ============================================ */

/* ===========================================
   1. Hub Header
   =========================================== */
.learn-hub-header {
  padding-top: calc(64px + 80px);
  text-align: center;
  margin-bottom: 32px;
}

.learn-title {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.learn-subtitle {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ===========================================
   2. Progress Overview
   =========================================== */
.learn-progress-overview {
  margin-bottom: 40px;
}

.learn-progress-stats {
  display: flex;
  gap: 24px;
  margin-bottom: 12px;
}

.learn-stat {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ===========================================
   3. Progress Bar (shared hub + module cards)
   =========================================== */
.learn-progress-bar-track {
  width: 100%;
  height: 8px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 4px;
  overflow: hidden;
}

.learn-progress-bar-track.small {
  height: 4px;
  border-radius: 2px;
  margin-top: 14px;
}

.learn-progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--cyan), var(--purple));
  border-radius: inherit;
  transition: width 0.5s ease;
}

/* ===========================================
   4. Module Cards Grid
   =========================================== */
.learn-module-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
  margin-bottom: 48px;
}

/* ===========================================
   5. Module Card
   =========================================== */
.learn-module-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: border-color var(--transition), background var(--transition),
    transform var(--transition), box-shadow var(--transition);
  cursor: pointer;
  overflow: hidden;
}

.learn-module-card:hover {
  border-color: var(--border-glow);
  background: var(--bg-card-hover);
  transform: translateY(-4px);
  box-shadow: 0 8px 40px rgba(0, 240, 255, 0.06);
}

.learn-module-icon {
  font-size: 2rem;
  margin-bottom: 16px;
  display: block;
}

.learn-module-title {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.learn-module-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 18px;
}

.learn-module-meta {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-muted);
  margin-top: 6px;
}

/* ===========================================
   6. Module Card — Locked
   =========================================== */
.learn-module-card.locked {
  opacity: 0.4;
  filter: grayscale(1);
  pointer-events: none;
  cursor: default;
}

.learn-module-lock {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 2.4rem;
  filter: grayscale(0);
  opacity: 0.8;
  pointer-events: none;
}

/* ===========================================
   7. Module Card — Completed
   =========================================== */
.learn-module-card.completed {
  border-color: var(--cyan);
  box-shadow: 0 0 12px rgba(0, 240, 255, 0.15), 0 0 36px rgba(0, 240, 255, 0.06);
}

.learn-module-badge {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--cyan);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%230a0a0f' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center;
}

/* ===========================================
   8. Buttons (shared)
   =========================================== */
.learn-btn {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 14px 28px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  font-weight: 600;
  transition: border-color var(--transition), color var(--transition),
    background var(--transition), box-shadow var(--transition),
    transform var(--transition);
  white-space: nowrap;
}

.learn-btn:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  background: rgba(0, 240, 255, 0.04);
}

.learn-btn-primary {
  background: var(--cyan);
  color: var(--bg-primary);
  border-color: var(--cyan);
}

.learn-btn-primary:hover {
  background: #33f5ff;
  box-shadow: var(--glow-cyan);
  transform: translateY(-2px);
}

.learn-btn-primary:active {
  transform: translateY(0);
}

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

.learn-btn-secondary:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  background: rgba(0, 240, 255, 0.04);
}

.learn-btn-completed {
  opacity: 0.4;
  cursor: default;
  transform: none;
  box-shadow: none;
  pointer-events: none;
}

/* ===========================================
   9. Save / Restore Section
   =========================================== */
.learn-save-section {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  margin-top: 48px;
}

.learn-save-title {
  font-family: var(--font-heading);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.learn-save-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 16px;
}

.learn-save-row {
  display: flex;
  gap: 10px;
  align-items: stretch;
}

.learn-save-input {
  flex: 1;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 10px 14px;
  color: var(--text-primary);
  outline: none;
  transition: border-color var(--transition);
}

.learn-save-input:focus {
  border-color: var(--cyan);
}

.learn-save-input::placeholder {
  color: var(--text-muted);
}

/* ===========================================
   10. Back Link
   =========================================== */
.learn-back-link {
  display: block;
  padding-top: calc(64px + 40px);
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  text-decoration: none;
  cursor: pointer;
  transition: color var(--transition);
  margin-bottom: 24px;
}

.learn-back-link:hover {
  color: var(--cyan);
}

/* ===========================================
   11. Lesson View Layout
   =========================================== */
.learn-lesson-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 0;
  min-height: calc(100vh - var(--nav-height));
}

/* ===========================================
   12. Lesson Sidebar
   =========================================== */
.learn-lesson-sidebar {
  background: var(--bg-card);
  border-right: 1px solid var(--border-color);
  padding: 24px 0;
  overflow-y: auto;
  max-height: calc(100vh - var(--nav-height));
  position: sticky;
  top: var(--nav-height);
}

.learn-sidebar-title {
  font-family: var(--font-heading);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-muted);
  padding: 0 20px 16px;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 8px;
}

.learn-sidebar-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

/* ===========================================
   13. Sidebar Item
   =========================================== */
.learn-sidebar-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  font-size: 0.82rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
  border-left: 3px solid transparent;
}

.learn-sidebar-item:hover {
  background: rgba(0, 240, 255, 0.04);
  color: var(--text-primary);
}

.learn-sidebar-item.active {
  background: rgba(0, 240, 255, 0.06);
  color: var(--cyan);
  border-left-color: var(--cyan);
  font-weight: 600;
}

.learn-sidebar-item.done {
  color: var(--text-muted);
}

.learn-sidebar-item.done .learn-check {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: rgba(0, 240, 255, 0.12);
  color: var(--cyan);
  font-size: 0.65rem;
  font-weight: 700;
  flex-shrink: 0;
}

.learn-sidebar-quiz {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  font-size: 0.82rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
  border-left: 3px solid transparent;
}

.learn-sidebar-quiz:hover {
  background: rgba(0, 240, 255, 0.04);
  color: var(--text-primary);
}

/* ===========================================
   14. Lesson Main Content
   =========================================== */
.learn-lesson-main {
  max-width: 760px;
  margin: 0 auto;
  padding: 48px 40px;
}

.learn-lesson-header {
  margin-bottom: 24px;
}

.learn-lesson-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.learn-lesson-title {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-primary);
}

.learn-lesson-body h2 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--cyan);
  margin-top: 36px;
  margin-bottom: 14px;
}

.learn-lesson-body h3 {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-top: 28px;
  margin-bottom: 10px;
}

.learn-lesson-paragraph {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.85;
  margin-bottom: 18px;
}

.learn-lesson-body ul,
.learn-lesson-body ol {
  padding-left: 24px;
  margin-bottom: 18px;
}

.learn-lesson-body li {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 6px;
}

.learn-lesson-body code {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  background: rgba(0, 240, 255, 0.06);
  padding: 2px 7px;
  border-radius: 4px;
  color: var(--cyan);
}

.learn-lesson-body pre {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 20px;
  overflow-x: auto;
  margin-bottom: 24px;
}

.learn-lesson-body pre code {
  background: none;
  padding: 0;
  font-size: 0.8rem;
  color: var(--text-primary);
}

.learn-lesson-body blockquote {
  border-left: 3px solid var(--purple);
  padding: 12px 20px;
  margin: 24px 0;
  background: rgba(176, 38, 255, 0.04);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.learn-lesson-body blockquote p {
  color: var(--text-primary);
  margin-bottom: 0;
}

/* ===========================================
   15. Lesson Footer (Complete Button)
   =========================================== */
.learn-lesson-footer {
  margin-top: 48px;
}

.learn-lesson-footer .learn-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
}

/* ===========================================
   16. Quiz View
   =========================================== */
.learn-quiz-container {
  max-width: 600px;
  margin: 0 auto;
  padding: 48px 24px;
}

.learn-quiz-header {
  margin-bottom: 24px;
}

.learn-quiz-title {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.learn-quiz-progress {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-muted);
  margin-bottom: 16px;
}

/* ===========================================
   17. Quiz Dots
   =========================================== */
.learn-quiz-dots {
  display: flex;
  gap: 6px;
  margin-bottom: 24px;
}

.learn-quiz-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
  transition: background var(--transition);
}

.learn-quiz-dot.active {
  background: var(--cyan);
  box-shadow: 0 0 6px rgba(0, 240, 255, 0.3);
}

.learn-quiz-dot.done {
  background: rgba(0, 240, 255, 0.3);
}

/* ===========================================
   18. Quiz Question
   =========================================== */
.learn-quiz-question {
  font-family: var(--font-body);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.5;
  margin-bottom: 32px;
}

/* ===========================================
   19. Quiz Options
   =========================================== */
.learn-quiz-options {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 32px;
}

.learn-quiz-option {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 20px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: border-color var(--transition), background var(--transition),
    color var(--transition), box-shadow var(--transition);
}

.learn-quiz-option:hover {
  border-color: var(--border-glow);
  background: rgba(0, 240, 255, 0.04);
  color: var(--text-primary);
}

.learn-quiz-option.selected {
  border-color: var(--cyan);
  background: rgba(0, 240, 255, 0.06);
  color: var(--text-primary);
  box-shadow: 0 0 8px rgba(0, 240, 255, 0.1);
}

.learn-quiz-option.correct {
  border-color: #00e676;
  background: rgba(0, 230, 118, 0.08);
  color: #00e676;
  box-shadow: 0 0 10px rgba(0, 230, 118, 0.12);
}

.learn-quiz-option.wrong {
  border-color: #ff4444;
  background: rgba(255, 68, 68, 0.08);
  color: #ff4444;
  box-shadow: 0 0 10px rgba(255, 68, 68, 0.12);
}

.learn-quiz-option-label {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-muted);
  flex-shrink: 0;
  transition: background var(--transition), color var(--transition);
}

.learn-quiz-option.selected .learn-quiz-option-label {
  background: rgba(0, 240, 255, 0.15);
  color: var(--cyan);
}

.learn-quiz-option.correct .learn-quiz-option-label {
  background: rgba(0, 230, 118, 0.15);
  color: #00e676;
}

.learn-quiz-option.wrong .learn-quiz-option-label {
  background: rgba(255, 68, 68, 0.15);
  color: #ff4444;
}

.learn-quiz-option-text {
  flex: 1;
}

/* ===========================================
   20. Quiz Results
   =========================================== */
.learn-quiz-results {
  text-align: center;
  padding: 40px 24px;
}

.learn-quiz-result-icon {
  font-size: 3rem;
  margin-bottom: 16px;
}

.learn-quiz-result-icon.success {
  color: #00e676;
}

.learn-quiz-result-icon.fail {
  color: #ff4444;
}

.learn-quiz-result-title {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.learn-quiz-result-score {
  font-family: var(--font-heading);
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: 12px;
  background: linear-gradient(135deg, var(--cyan), var(--purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.learn-quiz-result-icon.success ~ .learn-quiz-result-score {
  background: linear-gradient(135deg, #00e676, var(--cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.learn-quiz-result-icon.fail ~ .learn-quiz-result-score {
  background: linear-gradient(135deg, #ff4444, var(--magenta));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.learn-quiz-result-msg {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 32px;
}

.learn-quiz-result-icon.success ~ .learn-quiz-result-msg {
  color: #00e676;
}

.learn-quiz-result-icon.fail ~ .learn-quiz-result-msg {
  color: #ff4444;
}

/* Confetti animation class — toggled via JS */
.learn-quiz-results.confetti::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 100;
  background-image:
    radial-gradient(circle, var(--cyan) 1px, transparent 1px),
    radial-gradient(circle, var(--purple) 1px, transparent 1px),
    radial-gradient(circle, var(--magenta) 1px, transparent 1px),
    radial-gradient(circle, #00e676 1px, transparent 1px);
  background-size: 5% 5%, 7% 7%, 4% 4%, 6% 6%;
  background-position: 10% 0%, 40% 0%, 65% 0%, 85% 0%;
  animation: confetti-fall 2.5s ease-out forwards;
}

@keyframes confetti-fall {
  0% {
    opacity: 1;
    transform: translateY(-100vh) scale(1);
  }
  100% {
    opacity: 0;
    transform: translateY(100vh) scale(0.5);
  }
}

/* ===========================================
   21. Responsive
   =========================================== */

/* Tablet & below */
@media (max-width: 860px) {
  .learn-lesson-layout {
    grid-template-columns: 1fr;
  }

  .learn-lesson-sidebar {
    position: relative;
    top: auto;
    max-height: none;
    border-right: none;
    border-bottom: 1px solid var(--border-color);
    padding: 16px 0;
  }

  .learn-lesson-main {
    padding: 32px 20px;
  }

  .learn-module-grid {
    grid-template-columns: 1fr;
  }

  .learn-quiz-container {
    padding: 32px 16px;
  }

  .learn-quiz-question {
    font-size: 1.05rem;
  }
}

/* Small phones */
@media (max-width: 480px) {
  .learn-lesson-title {
    font-size: 1.25rem;
  }

  .learn-lesson-body h2 {
    font-size: 1rem;
  }

  .learn-module-card {
    padding: 20px;
  }

  .learn-save-row {
    flex-direction: column;
  }

  .learn-quiz-result-score {
    font-size: 2.2rem;
  }

  .learn-btn {
    font-size: 0.78rem;
    padding: 12px 20px;
  }
}