/* ========================================
   Coders Farm — Component Styles
   Buttons, Cards, Editor, Quiz, Progress
   ======================================== */

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-sm);
  font-weight: 600;
  font-family: var(--font-body);
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: background-color var(--transition-fast), transform var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
  line-height: 1.5;
}

.btn:hover {
  text-decoration: none;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background-color: var(--accent);
  color: #ffffff;
}

.btn-primary:hover {
  background-color: var(--accent-hover);
  color: #ffffff;
}

.btn-secondary {
  background-color: var(--bg-surface);
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background-color: var(--bg-surface-hover);
}

.btn-success {
  background-color: var(--success);
  color: #ffffff;
}

.btn-success:hover {
  opacity: 0.9;
}

.btn-sm {
  padding: var(--space-1) var(--space-3);
  font-size: var(--font-size-sm);
}

.btn-lg {
  padding: var(--space-3) var(--space-5);
  font-size: var(--font-size-base);
}

/* Cards */
.card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.card:hover {
  border-color: var(--accent);
  box-shadow: 0 4px 12px var(--shadow);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-4);
}

/* Track Card */
.track-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.track-card-header {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
}

.track-icon {
  width: 48px;
  height: 48px;
  background-color: var(--bg-elevated);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 1.5rem;
}

.track-card h3 {
  margin-bottom: var(--space-1);
  font-size: var(--font-size-xl);
}

.track-card .track-desc {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin-bottom: 0;
}

.track-meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--font-size-sm);
  color: var(--text-muted);
}

.track-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin-top: auto;
}

/* Progress Bar */
.progress-bar {
  width: 100%;
  height: 8px;
  background-color: var(--bg-elevated);
  border-radius: 4px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background-color: var(--success);
  border-radius: 4px;
  transition: width var(--transition-normal);
  min-width: 0;
}

.progress-text {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
  white-space: nowrap;
}

/* Code Editor Container */
.code-editor-wrapper {
  margin: var(--space-4) 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  background-color: var(--code-bg);
}

.code-editor-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-2) var(--space-3);
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border);
}

.code-editor-lang {
  font-size: var(--font-size-sm);
  font-family: var(--font-mono);
  color: var(--text-muted);
  text-transform: uppercase;
}

.code-editor-actions {
  display: flex;
  gap: var(--space-2);
}

.code-editor-container {
  min-height: 200px;
  position: relative;
}

/* Fallback textarea for small screens or no-JS */
.code-editor-fallback {
  width: 100%;
  min-height: 200px;
  padding: var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
  line-height: 1.5;
  background-color: var(--code-bg);
  color: var(--text-primary);
  border: none;
  resize: vertical;
  tab-size: 2;
}

.code-editor-fallback:focus {
  outline: none;
}

/* Output / Preview Pane */
.output-wrapper {
  border-top: 1px solid var(--border);
}

.output-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-2) var(--space-3);
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border);
}

.output-tabs {
  display: flex;
  gap: var(--space-1);
}

.output-tab {
  padding: var(--space-1) var(--space-2);
  font-size: var(--font-size-sm);
  font-family: var(--font-body);
  color: var(--text-muted);
  background: none;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.output-tab.active {
  color: var(--text-primary);
  background-color: var(--bg-elevated);
}

.output-label {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
}

.output-preview {
  min-height: 120px;
  background-color: #ffffff;
  position: relative;
}

.output-preview iframe {
  width: 100%;
  min-height: 120px;
  border: none;
  display: block;
}

.output-console {
  min-height: 80px;
  max-height: 200px;
  overflow-y: auto;
  padding: var(--space-2) var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
  background-color: var(--bg-primary);
}

.console-line {
  padding: 2px 0;
  border-bottom: 1px solid var(--border);
  white-space: pre-wrap;
  word-break: break-all;
}

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

.console-line.error {
  color: var(--error);
}

.console-line.warn {
  color: var(--warning);
}

/* Quiz */
.quiz {
  margin: var(--space-5) 0;
  padding: var(--space-4);
  background-color: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.quiz-question {
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-3);
  font-size: var(--font-size-lg);
}

.quiz-options {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.quiz-options label {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
  color: var(--text-secondary);
  line-height: 1.5;
}

.quiz-options label:hover {
  background-color: var(--bg-surface-hover);
  border-color: var(--border-light);
}

.quiz-options label.selected {
  border-color: var(--accent);
  background-color: rgba(79, 193, 255, 0.05);
}

.quiz-options label.correct {
  border-color: var(--success);
  background-color: var(--success-bg);
}

.quiz-options label.incorrect {
  border-color: var(--error);
  background-color: var(--error-bg);
}

.quiz-options input[type="radio"],
.quiz-options input[type="checkbox"] {
  margin-top: 3px;
  flex-shrink: 0;
  accent-color: var(--accent);
}

.quiz-submit {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.quiz-answer {
  display: none;
  padding: var(--space-3);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  line-height: 1.6;
}

.quiz-answer.visible {
  display: block;
}

.quiz-answer.correct {
  background-color: var(--success-bg);
  border: 1px solid var(--success);
  color: var(--success);
}

.quiz-answer.incorrect {
  background-color: var(--error-bg);
  border: 1px solid var(--error);
  color: var(--error);
}

/* Mark Complete */
.mark-complete-section {
  text-align: center;
  padding: var(--space-5) 0;
  margin-top: var(--space-5);
}

.mark-complete-section p {
  color: var(--text-muted);
  margin-bottom: var(--space-3);
}

.completed-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background-color: var(--success-bg);
  color: var(--success);
  border: 1px solid var(--success);
  border-radius: var(--radius-md);
  font-weight: 600;
}

/* Data Management */
.data-management {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

/* Callout boxes */
.callout {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  margin: var(--space-3) 0;
  border-left: 4px solid;
}

.callout-info {
  background-color: rgba(79, 193, 255, 0.08);
  border-color: var(--accent);
  color: var(--text-secondary);
}

.callout-tip {
  background-color: var(--success-bg);
  border-color: var(--success);
  color: var(--text-secondary);
}

.callout-warning {
  background-color: rgba(204, 167, 0, 0.08);
  border-color: var(--warning);
  color: var(--text-secondary);
}

.callout strong {
  display: block;
  margin-bottom: var(--space-1);
}

/* Loading spinner */
.loading-spinner {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-5);
  color: var(--text-muted);
}

.spinner {
  width: 24px;
  height: 24px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-right: var(--space-2);
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ========================================
   Side Quest Cards
   ======================================== */

/* Section header */
.side-quests-section {
  margin-top: var(--space-6);
  padding-top: var(--space-6);
  border-top: 1px solid var(--border);
}

.side-quests-header {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  margin-bottom: var(--space-2);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.sq-progress {
  font-size: var(--font-size-sm);
  font-weight: 400;
  color: var(--text-muted);
  margin-left: var(--space-2);
}

.sq-completed-count {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
  margin-bottom: var(--space-4);
}

.sq-category-title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-top: var(--space-5);
  margin-bottom: var(--space-3);
  color: var(--text-secondary);
}

.sq-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-4);
}

/* Side quest card */
.side-quest-card {
  position: relative;
  background-color: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  transition: all 0.3s ease;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.side-quest-card.locked {
  user-select: none;
  pointer-events: none;
}

.side-quest-card.locked .sq-title,
.side-quest-card.locked .sq-teaser,
.side-quest-card.locked .sq-meta {
  filter: blur(3px);
  opacity: 0.6;
}

.side-quest-card.locked .sq-icon {
  filter: blur(1px);
  opacity: 0.8;
}

.sq-icon {
  font-size: 2rem;
  line-height: 1;
}

.sq-title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
}

.sq-teaser {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0;
  flex-grow: 1;
}

.sq-meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--font-size-sm);
  color: var(--text-muted);
  margin-top: var(--space-1);
}

.sq-difficulty {
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  background-color: var(--bg-elevated);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Lock overlay */
.sq-lock-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: rgba(30, 30, 30, 0.15);
  backdrop-filter: blur(2px);
  border-radius: var(--radius-lg);
  gap: var(--space-2);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.side-quest-card.locked:hover .sq-lock-overlay {
  opacity: 1;
}

.lock-icon {
  width: 24px;
  height: 24px;
  opacity: 0.7;
  stroke: var(--text-muted);
}

.sq-lock-overlay span {
  font-size: 13px;
  opacity: 0.8;
  color: var(--text-secondary);
}

/* Completed checkmark */
.sq-completed-badge {
  position: absolute;
  top: var(--space-2);
  right: var(--space-2);
  width: 28px;
  height: 28px;
  background-color: var(--success);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.sq-completed-badge svg {
  width: 16px;
  height: 16px;
  stroke: #ffffff;
  fill: none;
  stroke-width: 3;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* Unlocked state */
.side-quest-card.unlocked {
  pointer-events: auto;
  cursor: pointer;
}

.side-quest-card.unlocked:hover {
  border-color: var(--accent);
  box-shadow: 0 4px 12px var(--shadow);
}

.side-quest-card.unlocked .sq-title,
.side-quest-card.unlocked .sq-teaser,
.side-quest-card.unlocked .sq-meta,
.side-quest-card.unlocked .sq-icon {
  filter: none;
  opacity: 1;
}

.side-quest-card.unlocked .sq-lock-overlay {
  display: none;
}

/* Unlock shimmer animation */
@keyframes unlock-shimmer {
  0% { background-position: -200% center; }
  100% { background-position: 200% center; }
}

.side-quest-card.just-unlocked {
  animation: unlock-shimmer 1.5s ease-out;
  background-size: 200% auto;
  background-image: linear-gradient(
    90deg,
    transparent 0%,
    rgba(79, 193, 255, 0.15) 50%,
    transparent 100%
  );
}

/* Light theme overrides */
[data-theme="light"] .sq-lock-overlay {
  background: rgba(255, 255, 255, 0.4);
}

[data-theme="light"] .sq-lock-overlay span {
  color: var(--text-primary);
}

/* Side quest page accent bar */
.sq-accent-bar {
  height: 4px;
  background: linear-gradient(90deg, var(--accent), var(--success));
  margin: calc(-1 * var(--space-4)) calc(-1 * var(--space-4)) var(--space-4);
  border-radius: 0;
}

.sq-label {
  display: inline-block;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: var(--space-2);
}

/* ========================================
   Narrator — Listen to lesson
   ======================================== */

/* Play button in lesson header */
.narrator-play-wrapper {
  margin-top: var(--space-3);
}

.narrator-play-btn {
  gap: var(--space-2);
}

.narrator-play-btn .narrator-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

/* Per-word highlight while speaking */
.narrator-word-active {
  background-color: rgba(79, 193, 255, 0.3);
  border-radius: 2px;
  box-shadow: 0 0 0 2px rgba(79, 193, 255, 0.15);
  transition: background-color 100ms ease;
}

[data-theme="light"] .narrator-word-active {
  background-color: rgba(0, 102, 204, 0.2);
  box-shadow: 0 0 0 2px rgba(0, 102, 204, 0.1);
}

/* Active block indicator (visible even without word-level events) */
.narrator-block-active {
  border-left: 3px solid var(--accent);
  padding-left: var(--space-2);
  transition: border-color var(--transition-fast), padding-left var(--transition-fast);
}

/* Floating controls — only visible after play is pressed */
.narrator-float {
  position: fixed;
  bottom: var(--space-4);
  right: var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  background-color: rgba(37, 37, 38, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
  z-index: 999;
  opacity: 0;
  transform: translateY(20px);
  pointer-events: none;
  transition: opacity 250ms ease, transform 250ms ease;
}

.narrator-float.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

[data-theme="light"] .narrator-float {
  background-color: rgba(255, 255, 255, 0.85);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.narrator-float-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: none;
  border-radius: var(--radius-md);
  background: none;
  color: var(--text-primary);
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

.narrator-float-btn:hover {
  background-color: var(--bg-surface-hover);
}

.narrator-float-btn svg {
  width: 18px;
  height: 18px;
}

.narrator-float-pause {
  background-color: var(--accent);
  color: #ffffff;
}

.narrator-float-pause:hover {
  background-color: var(--accent-hover);
}

.narrator-float-pause svg {
  stroke: #ffffff;
}

.narrator-float-rate {
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
  font-weight: 600;
  min-width: 40px;
}

.narrator-rate-label {
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
}

.narrator-float-progress {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
  white-space: nowrap;
  padding: 0 var(--space-1);
}

/* What to Expect — collapsible details */
.expect-details {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background-color: var(--bg-surface);
}

.expect-summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-4);
  margin-bottom: 0;
  user-select: none;
}

.expect-summary::-webkit-details-marker {
  display: none;
}

.expect-summary::after {
  content: '';
  width: 10px;
  height: 10px;
  border-right: 2px solid var(--text-muted);
  border-bottom: 2px solid var(--text-muted);
  transform: rotate(-45deg);
  transition: transform var(--transition-fast);
  flex-shrink: 0;
}

.expect-details[open] .expect-summary::after {
  transform: rotate(45deg);
}

.expect-body {
  padding: 0 var(--space-4) var(--space-4);
}

.expect-body h3 {
  font-size: var(--font-size-base);
  font-weight: 600;
  margin-top: var(--space-4);
  margin-bottom: var(--space-2);
  color: var(--text-primary);
}

.expect-body ul {
  padding-left: var(--space-4);
  margin-bottom: 0;
}

.expect-body li {
  margin-bottom: var(--space-2);
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  line-height: 1.6;
}

.expect-body p {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  line-height: 1.6;
}

/* Responsive */
@media (max-width: 768px) {
  .card-grid {
    grid-template-columns: 1fr;
  }

  .code-editor-container {
    min-height: 150px;
  }

  .quiz {
    padding: var(--space-3);
  }

  .data-management {
    flex-direction: column;
  }

  .data-management .btn {
    width: 100%;
  }

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

  .narrator-float {
    bottom: var(--space-3);
    right: var(--space-3);
    left: var(--space-3);
    justify-content: center;
  }
}