/* ============================================
   MATERIALS CHECKLIST
   ============================================ */

.materials-screen {
  text-align: center;
}

.materials-list {
  text-align: left;
  margin: var(--spacing-lg) 0;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.material-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--color-surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.material-emoji {
  font-size: 1.5rem;
  flex-shrink: 0;
}

.material-doodle {
  width: 44px;
  height: 44px;
  object-fit: contain;
  border-radius: 8px;
  flex-shrink: 0;
  mix-blend-mode: multiply;
}

.material-info-name {
  font-weight: 600;
  margin-bottom: 2px;
}

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

/* ============================================
   ENCOURAGEMENT BANNER
   ============================================ */

.encouragement-banner {
  background: var(--color-primary-light);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
  border-left: 4px solid var(--color-primary);
}

.encouragement-banner p {
  font-size: 0.95rem;
  color: var(--color-text);
  line-height: 1.6;
}

.encouragement-banner .real-world {
  margin-top: var(--spacing-sm);
  font-size: 0.85rem;
  color: var(--color-text-muted);
  font-style: italic;
}

/* ============================================
   SETUP STEPS
   ============================================ */

.setup-section {
  margin-bottom: var(--spacing-xl);
  padding: var(--spacing-lg);
  background: var(--color-accent-light);
  border-radius: var(--radius-md);
}

.setup-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  margin-bottom: var(--spacing-md);
}

.setup-steps {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.setup-step {
  display: flex;
  gap: var(--spacing-sm);
  font-size: 0.9rem;
  line-height: 1.5;
}

.setup-step-number {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  background: var(--color-accent);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
}

/* ============================================
   STEP BUBBLES
   ============================================ */

.steps-container {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.step-bubble {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
  border-left: 4px solid var(--color-primary);
  opacity: 0;
  transform: translateX(30px);
  animation: stepSlideIn 0.4s ease-out forwards;
}

.step-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
}

.step-number {
  width: 28px;
  height: 28px;
  background: var(--color-primary);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 700;
  flex-shrink: 0;
}

.step-label {
  font-size: 0.75rem;
  color: var(--color-text-light);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.step-instruction {
  font-size: 1rem;
  line-height: 1.6;
  margin-bottom: var(--spacing-sm);
}

.step-instruction strong {
  color: var(--color-primary);
}

.step-action {
  font-size: 0.9rem;
  color: var(--color-text);
  background: var(--color-border-light);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-sm);
  margin-bottom: var(--spacing-sm);
  line-height: 1.5;
}

/* ============================================
   CHECKPOINT
   ============================================ */

.checkpoint-box {
  border: 2px dashed var(--color-success);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  background: var(--color-success-light);
  margin: var(--spacing-sm) 0;
}

.checkpoint-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--color-success);
  margin-bottom: var(--spacing-xs);
}

.checkpoint-text {
  font-size: 0.9rem;
  line-height: 1.5;
}

/* ============================================
   CONCEPT NOTE
   ============================================ */

.concept-note {
  margin-top: var(--spacing-sm);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.concept-note-toggle {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: 0.8rem;
  color: var(--color-primary);
  font-weight: 600;
  padding: var(--spacing-xs) 0;
  cursor: pointer;
}

.concept-note-toggle .arrow {
  transition: transform 0.2s ease;
  font-size: 0.6rem;
}

.concept-note-toggle.open .arrow {
  transform: rotate(90deg);
}

.concept-note-content {
  display: none;
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--color-primary-light);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  color: var(--color-text);
  line-height: 1.5;
  margin-top: var(--spacing-xs);
}

.concept-note-content.open {
  display: block;
}

/* ============================================
   HINT
   ============================================ */

.hint-toggle {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: 0.8rem;
  color: var(--color-accent);
  font-weight: 600;
  cursor: pointer;
  margin-top: var(--spacing-xs);
}

.hint-content {
  display: none;
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--color-accent-light);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  margin-top: var(--spacing-xs);
  line-height: 1.5;
}

.hint-content.open {
  display: block;
}

/* ============================================
   NAVIGATION
   ============================================ */

.tutorial-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--color-border-light);
}

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

/* ============================================
   REFLECTION
   ============================================ */

.reflection-section {
  margin-top: var(--spacing-xl);
  padding: var(--spacing-lg);
  background: var(--color-surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
}

.reflection-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  margin-bottom: var(--spacing-md);
}

.reflection-subtitle {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-md);
}

.reflection-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

/* Flashcard styles */
.flashcard {
  perspective: 800px;
  cursor: pointer;
  min-height: 100px;
}

.flashcard-inner {
  position: relative;
  transition: transform 0.5s ease;
  transform-style: preserve-3d;
}

.flashcard.flipped .flashcard-inner {
  transform: rotateY(180deg);
}

.flashcard-front,
.flashcard-back {
  padding: var(--spacing-md);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  line-height: 1.5;
  backface-visibility: hidden;
}

.flashcard-front {
  background: var(--color-border-light);
  position: relative;
}

.flashcard-front::after {
  content: "tap to reveal";
  position: absolute;
  bottom: 4px;
  right: var(--spacing-sm);
  font-size: 0.65rem;
  color: var(--color-text-light);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.flashcard-back {
  background: var(--color-success-light);
  border: 1px solid var(--color-success);
  transform: rotateY(180deg);
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
}

/* Materials note */
.materials-note {
  padding: var(--spacing-md);
  background: var(--color-accent-light);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.5;
  font-style: italic;
}

.tutorial-end-actions {
  display: flex;
  gap: var(--spacing-md);
  margin-top: var(--spacing-xl);
  justify-content: center;
  flex-wrap: wrap;
}