/* ===================================
   Book-Style Tutorial Page
   =================================== */

.book-main {
  min-height: calc(100vh - 100px);
  padding: 3rem 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.book-container {
  position: relative;
  max-width: 900px;
  width: 90%;
  margin: 0 auto;
}

/* Contents Tab */
.contents-tab {
  position: relative;
  margin-bottom: 1rem;
  z-index: 50;
}

.contents-toggle {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.25rem;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px 8px 0 0;
  color: var(--beige);
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.3s ease;
  width: auto;
  font-family: 'Cinzel', serif;
}

.contents-toggle:hover {
  background: rgba(191, 160, 111, 0.1);
  border-color: var(--accent);
}

.contents-toggle i {
  font-size: 1.2rem;
}

.contents-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  width: 300px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 0 8px 8px 8px;
  padding: 1.5rem;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all 0.3s ease;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.contents-dropdown.active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.contents-dropdown h4 {
  font-family: 'Cinzel', serif;
  color: var(--beige);
  margin: 0 0 1rem 0;
  font-size: 1.1rem;
}

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

.contents-list li {
  margin-bottom: 0.5rem;
}

.contents-list a {
  display: block;
  padding: 0.5rem 0.75rem;
  color: var(--text);
  text-decoration: none;
  border-radius: 4px;
  transition: all 0.2s ease;
  font-size: 0.95rem;
}

.contents-list a:hover {
  background: rgba(191, 160, 111, 0.1);
  color: var(--accent);
  padding-left: 1rem;
}

/* Progress Bar */
.progress-bar-container {
  position: relative;
  width: 100%;
  height: 4px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 2px;
  margin-bottom: 2rem;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--beige));
  border-radius: 2px;
  transition: width 0.4s ease;
}

.progress-text {
  position: absolute;
  top: -1.5rem;
  right: 0;
  font-size: 0.85rem;
  color: var(--muted);
  font-family: 'Crimson Text', serif;
}

/* Book Wrapper */
.book-wrapper {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2rem;
}

/* Page Arrows */
.page-arrow {
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--accent);
  width: 50px;
  height: 50px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s ease;
  font-size: 1.5rem;
  flex-shrink: 0;
}

.page-arrow:hover:not(:disabled) {
  background: var(--accent);
  color: var(--bg);
  transform: scale(1.1);
  box-shadow: 0 4px 12px rgba(191, 160, 111, 0.3);
}

.page-arrow:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.page-arrow i {
  pointer-events: none;
}

/* Book Pages */
.book-pages {
  flex: 1;
  max-width: 700px;
  min-height: 500px;
  background: var(--panel);
  border: 2px solid var(--border);
  border-radius: 12px;
  padding: 3rem;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
  position: relative;
  overflow: hidden;
}

.book-pages::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 2px,
      rgba(191, 160, 111, 0.02) 2px,
      rgba(191, 160, 111, 0.02) 4px
    );
  pointer-events: none;
  opacity: 0.5;
}

.book-page {
  position: relative;
  z-index: 1;
}

.page-content {
  font-family: 'Crimson Text', serif;
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--text);
}

.page-content h2 {
  font-family: 'Cinzel', serif;
  color: var(--beige);
  font-size: 2rem;
  margin: 0 0 1.5rem 0;
  text-align: center;
  letter-spacing: 0.05em;
}

.page-content h3 {
  font-family: 'Cinzel', serif;
  color: var(--beige);
  font-size: 1.3rem;
  margin: 1.5rem 0 1rem 0;
}

.page-content p {
  margin: 0 0 1rem 0;
}

.page-content ul {
  margin: 1rem 0;
  padding-left: 1.5rem;
}

.page-content li {
  margin-bottom: 0.75rem;
  color: var(--text);
}

.page-content strong {
  color: var(--beige);
  font-weight: 600;
}

.page-content a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease;
}

.page-content a:hover {
  border-bottom-color: var(--accent);
}

.page-decoration {
  text-align: center;
  margin: 2rem 0;
  font-size: 2rem;
  color: var(--accent);
  opacity: 0.3;
}

.page-note {
  font-style: italic;
  color: var(--muted);
  border-left: 3px solid var(--accent);
  padding-left: 1rem;
  margin: 1.5rem 0;
}

.page-number {
  position: absolute;
  bottom: 0 rem;
  right: 2rem;
  font-family: 'Crimson Text', serif;
  font-size: 0.9rem;
  color: var(--muted);
  font-style: italic;
}

/* Text Colors */
.text-gray { color: #9a968f; }
.text-green { color: #4ade80; }
.text-blue { color: #60a5fa; }
.text-purple { color: #c084fc; }
.text-orange { color: #fb923c; }

/* Help Button */
.help-button {
  position: fixed;
  right: 2rem;
  bottom: 2rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 1.25rem;
  background: var(--accent);
  color: var(--bg);
  border: none;
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 4px 12px rgba(191, 160, 111, 0.3);
  z-index: 100;
}

.help-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(191, 160, 111, 0.4);
}

.help-button i {
  font-size: 1.2rem;
}

/* Help Modal */
.help-modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}

.help-modal.active {
  opacity: 1;
  visibility: visible;
}

.help-modal-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
}

.help-modal-content {
  position: relative;
  z-index: 1;
  background: var(--panel);
  border: 2px solid var(--border);
  border-radius: 12px;
  padding: 2.5rem;
  max-width: 500px;
  width: 90%;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
}

.help-modal-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: transparent;
  border: none;
  color: var(--muted);
  font-size: 2rem;
  cursor: pointer;
  transition: color 0.3s ease;
  line-height: 1;
}

.help-modal-close:hover {
  color: var(--text);
}

.help-modal-content h3 {
  font-family: 'Cinzel', serif;
  color: var(--beige);
  font-size: 1.8rem;
  margin: 0 0 1rem 0;
}

.help-modal-content p {
  color: var(--text);
  margin: 0 0 1.5rem 0;
  line-height: 1.6;
}

.help-modal-content ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.help-modal-content li {
  margin-bottom: 0.75rem;
}

.help-modal-content a {
  display: block;
  padding: 0.75rem 1rem;
  background: rgba(191, 160, 111, 0.1);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--beige);
  text-decoration: none;
  transition: all 0.3s ease;
}

.help-modal-content a:hover {
  background: rgba(191, 160, 111, 0.2);
  border-color: var(--accent);
  transform: translateX(5px);
}

/* Responsive Design */
@media (max-width: 768px) {
  .book-main {
    padding: 2rem 0;
  }

  .book-wrapper {
    gap: 1rem;
  }

  .page-arrow {
    width: 40px;
    height: 40px;
    font-size: 1.2rem;
  }

  .book-pages {
    padding: 2rem 1.5rem;
    min-height: 400px;
  }

  .page-content h2 {
    font-size: 1.5rem;
  }

  .page-content {
    font-size: 1rem;
  }

  .contents-dropdown {
    width: 250px;
  }

  .help-button {
    right: 1rem;
    bottom: 1rem;
    padding: 0.75rem 1rem;
  }

  .help-button span {
    display: none;
  }
}

@media (max-width: 480px) {
  .book-pages {
    padding: 1.5rem 1rem;
    min-height: 350px;
  }

  .page-content h2 {
    font-size: 1.3rem;
  }

  .page-content h3 {
    font-size: 1.1rem;
  }

  .page-arrow {
    width: 35px;
    height: 35px;
    font-size: 1rem;
  }
}