/**
 * Tutorial Carousel Modal - "How It Works"
 * Phase 2: Standalone carousel accessible anytime
 * Self-contained styles — no modifications to existing CSS required
 */

/* ============================================
   CSS Custom Properties (Tutorial-specific)
   ============================================ */
:root {
  --tut-z-modal: 10000;
  --tut-z-content: 10001;
  --tut-color-bg: #FFFFFF;
  --tut-color-text: #212121;
  --tut-color-text-light: #555555;
  --tut-color-primary: var(--color-primary, #2E86AB);
  --tut-color-primary-hover: var(--color-primary-hover, #1a6b8a);
  --tut-color-accent: var(--color-accent, #F18F01);
  --tut-color-border: #E0E0E0;
  --tut-radius: var(--radius-lg, 12px);
  --tut-shadow: 0 16px 48px rgba(0, 0, 0, 0.3), 0 6px 16px rgba(0, 0, 0, 0.15);
  --tut-transition: var(--transition-base, 0.3s ease);
  --tut-modal-max-width: 640px;
}

/* ============================================
   Modal Container
   ============================================ */
.tutorial-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: var(--tut-z-modal);
  display: none;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--tut-transition);
}

.tutorial-modal.active {
  opacity: 1;
}

/* ============================================
   Overlay
   ============================================ */
.tutorial-modal-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.55);
  cursor: pointer;
}

/* ============================================
   Content Card
   ============================================ */
.tutorial-modal-content {
  position: relative;
  z-index: var(--tut-z-content);
  background: var(--tut-color-bg);
  border-radius: var(--tut-radius);
  box-shadow: var(--tut-shadow);
  max-width: var(--tut-modal-max-width);
  width: calc(100% - 2rem);
  height: 85vh;
  max-height: 780px;
  display: flex;
  flex-direction: column;
  animation: tutSlideUp 0.35s ease;
  overflow: hidden;
}

@keyframes tutSlideUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============================================
   Header
   ============================================ */
.tutorial-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--tut-color-border);
  flex-shrink: 0;
}

.tutorial-slide-counter {
  font-family: var(--font-primary, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--tut-color-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.tutorial-close-btn {
  background: transparent;
  border: none;
  color: var(--tut-color-text);
  cursor: pointer;
  padding: 0.4rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md, 8px);
  transition: background var(--tut-transition);
  line-height: 1;
}

.tutorial-close-btn:hover {
  background: #F0F0F0;
}

.tutorial-close-btn:focus {
  outline: 2px solid var(--color-focus, #3b82f6);
  outline-offset: 2px;
}

.tutorial-close-btn:focus:not(:focus-visible) {
  outline: none;
}

.tutorial-close-btn:focus-visible {
  outline: 2px solid var(--color-focus, #3b82f6);
  outline-offset: 2px;
}

.tutorial-close-btn svg {
  width: 20px;
  height: 20px;
}

/* ============================================
   Slide Container & Track
   ============================================ */
.tutorial-slide-container {
  overflow: hidden;
  flex: 1;
  min-height: 0;
}

.tutorial-slide-track {
  display: flex;
  transition: transform 0.4s ease;
  will-change: transform;
}

.tutorial-slide {
  flex: 0 0 100%;
  min-width: 100%;
  padding: 1.5rem;
  box-sizing: border-box;
  overflow-y: auto;
}

/* ============================================
   Slide Content
   ============================================ */
.tutorial-slide-icon {
  font-size: 2rem;
  margin-bottom: 0.5rem;
  display: block;
}

.tutorial-slide-title {
  font-family: var(--font-heading, Georgia, 'Times New Roman', serif);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--tut-color-text);
  margin: 0 0 0.75rem 0;
  line-height: 1.3;
}

.tutorial-slide-description {
  font-family: var(--font-primary, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif);
  font-size: 0.95rem;
  color: var(--tut-color-text-light);
  line-height: 1.65;
  margin: 0;
}

/* ============================================
   Screenshot Placeholder
   ============================================ */
.tutorial-slide-screenshot {
  width: 100%;
  height: 200px;
  border: 2px dashed var(--tut-color-border);
  border-radius: var(--radius-md, 8px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: #F8F9FA;
  color: #AAAAAA;
  gap: 0.5rem;
  margin: 1rem 0;
  transition: border-color var(--tut-transition);
}

.tutorial-slide-screenshot svg {
  width: 32px;
  height: 32px;
  opacity: 0.5;
}

.tutorial-slide-screenshot span {
  font-family: var(--font-primary, sans-serif);
  font-size: 0.8rem;
  font-weight: 500;
}

/* Real screenshot image */
.tutorial-slide-screenshot.has-image {
  height: auto;
  max-height: 300px;
  border: none;
  background: none;
  overflow: hidden;
  padding: 0;
}

.tutorial-slide-screenshot.has-image img {
  width: 100%;
  height: auto;
  max-height: 300px;
  object-fit: contain;
  display: block;
  border-radius: 0;
}

/* Slide-up animation for first slide image */
.tutorial-slide-screenshot.slide-up-image {
  animation: slideUpImage 0.8s ease-out 0.3s both;
  border: none;
  box-shadow: none;
}

@keyframes slideUpImage {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============================================
   AI Disclaimer Callout (Slide 10)
   ============================================ */
.tutorial-ai-notice {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  background: #FFF8E1;
  border: 1px solid #FFE082;
  border-radius: var(--radius-md, 8px);
  padding: 1rem;
  margin: 1rem 0;
}

.tutorial-ai-notice .tutorial-ai-icon {
  font-size: 1.25rem;
  flex-shrink: 0;
  line-height: 1;
  margin-top: 0.1rem;
}

.tutorial-ai-notice p {
  font-size: 0.875rem;
  color: #5D4037;
  line-height: 1.5;
  margin: 0;
}

.tutorial-ai-notice strong {
  color: #4E342E;
}

/* ============================================
   Attribution
   ============================================ */
.tutorial-attribution {
  font-family: var(--font-primary, sans-serif);
  font-size: 0.75rem;
  color: #999999;
  text-align: center;
  padding: 0.5rem 1.5rem 0.75rem;
  flex-shrink: 0;
}

/* ============================================
   Footer (Navigation)
   ============================================ */
.tutorial-modal-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--tut-color-border);
  flex-shrink: 0;
  gap: 0.5rem;
}

/* Nav Buttons */
.tutorial-nav-btn {
  font-family: var(--font-primary, sans-serif);
  font-size: 0.875rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-md, 8px);
  cursor: pointer;
  padding: 0.5rem 1.25rem;
  transition: background var(--tut-transition), transform 0.15s ease, opacity var(--tut-transition);
  line-height: 1.4;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.tutorial-nav-btn:active {
  transform: scale(0.97);
}

.tutorial-nav-btn:focus {
  outline: 3px solid var(--color-focus, #3b82f6);
  outline-offset: 2px;
}

.tutorial-nav-btn:focus:not(:focus-visible) {
  outline: none;
}

.tutorial-nav-btn:focus-visible {
  outline: 3px solid var(--color-focus, #3b82f6);
  outline-offset: 2px;
}

/* Next / Done button (primary) */
.tutorial-next-btn {
  background: var(--tut-color-primary);
  color: #FFFFFF;
}

.tutorial-next-btn:hover {
  background: var(--tut-color-primary-hover);
}

.tutorial-next-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* Back button (secondary) */
.tutorial-prev-btn {
  background: transparent;
  color: var(--tut-color-text-light);
}

.tutorial-prev-btn:hover:not(:disabled) {
  background: #F0F0F0;
  color: var(--tut-color-text);
}

.tutorial-prev-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

/* ============================================
   Progress Dots
   ============================================ */
.tutorial-dots {
  display: flex;
  gap: 6px;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
}

.tutorial-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #D0D0D0;
  border: none;
  padding: 0;
  cursor: pointer;
  transition: background var(--tut-transition), transform var(--tut-transition);
}

.tutorial-dot:hover {
  background: #B0B0B0;
}

.tutorial-dot.active {
  background: var(--tut-color-primary);
  transform: scale(1.3);
}

.tutorial-dot.completed {
  background: var(--tut-color-primary);
  opacity: 0.5;
}

.tutorial-dot:focus {
  outline: 2px solid var(--color-focus, #3b82f6);
  outline-offset: 2px;
}

.tutorial-dot:focus:not(:focus-visible) {
  outline: none;
}

.tutorial-dot:focus-visible {
  outline: 2px solid var(--color-focus, #3b82f6);
  outline-offset: 2px;
}

/* ============================================
   Centered Slide Content (Slides 1 & 10)
   ============================================ */
.tutorial-slide-centered {
  text-align: center;
}

.tutorial-slide-centered .tutorial-slide-icon {
  font-size: 2.5rem;
}

.tutorial-slide-centered .tutorial-slide-title {
  font-size: 1.4rem;
}

/* ============================================
   Accessibility: Reduced Motion
   ============================================ */
@media (prefers-reduced-motion: reduce) {
  .tutorial-modal {
    transition: none;
  }

  .tutorial-modal-content {
    animation: none;
  }

  .tutorial-slide-track {
    transition: none;
  }

  .tutorial-dot {
    transition: none;
  }

  .tutorial-nav-btn {
    transition: none;
  }

  .tutorial-slide-screenshot.slide-up-image {
    animation: none;
  }
}

/* ============================================
   Responsive: Tablet & Below
   ============================================ */
@media (max-width: 768px) {
  :root {
    --tut-modal-max-width: 90vw;
  }

  .tutorial-modal-header {
    padding: 0.75rem 1.25rem;
  }

  .tutorial-slide {
    padding: 1.25rem;
  }

  .tutorial-slide-title {
    font-size: 1.15rem;
  }

  .tutorial-slide-description {
    font-size: 0.9rem;
  }

  .tutorial-slide-screenshot {
    height: 160px;
  }

  .tutorial-slide-screenshot.has-image {
    height: auto;
    max-height: 240px;
  }

  .tutorial-slide-screenshot.has-image img {
    max-height: 240px;
  }

  .tutorial-modal-footer {
    padding: 0.75rem 1.25rem;
  }

  .tutorial-attribution {
    padding: 0.5rem 1.25rem 0.75rem;
  }
}

/* ============================================
   Responsive: Mobile
   ============================================ */
@media (max-width: 480px) {
  :root {
    --tut-modal-max-width: 100%;
  }

  .tutorial-modal-content {
    width: 100%;
    height: 85vh;
    max-height: none;
    border-radius: var(--tut-radius) var(--tut-radius) 0 0;
    margin-top: auto;
  }

  .tutorial-modal {
    align-items: flex-end;
  }

  .tutorial-slide {
    padding: 1rem;
  }

  .tutorial-slide-screenshot {
    height: 140px;
  }

  .tutorial-slide-screenshot.has-image {
    height: auto;
    max-height: 200px;
  }

  .tutorial-slide-screenshot.has-image img {
    max-height: 200px;
  }

  .tutorial-slide-title {
    font-size: 1.1rem;
  }

  .tutorial-slide-description {
    font-size: 0.875rem;
  }

  .tutorial-nav-btn {
    font-size: 0.8rem;
    padding: 0.5rem 1rem;
  }

  .tutorial-dots {
    gap: 5px;
  }

  .tutorial-dot {
    width: 7px;
    height: 7px;
  }

  .tutorial-slide-centered .tutorial-slide-icon {
    font-size: 2rem;
  }

  .tutorial-slide-centered .tutorial-slide-title {
    font-size: 1.2rem;
  }
}