/**
 * Reading Progress Styles
 * Progress bar, bookmark, and resume reading UI
 */

/* Reading Progress Bar Container */
.reading-progress-container {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: var(--z-sticky);
  background: var(--color-background);
  padding: 0;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  height: 4px;
  width: 100%;
}

.reading-progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-dark));
  width: 0%;
  transition: width 0.3s ease;
  border-radius: 0;
}

/* Progress percentage text */
.reading-progress-text {
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 0.75rem;
  color: var(--color-text-light);
  background: var(--color-background);
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  font-weight: 600;
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

/* Show percentage on hover or when scrolling */
.reading-progress-container:hover .reading-progress-text {
  opacity: 1;
}

/* Resume Reading Button */
/* Resume Reading Button - Compact */
.resume-reading-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  margin: 0 0 1.5rem;
  padding: 0.625rem 1rem;
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  transition: all var(--transition-base);
  animation: slideDown 0.3s ease;
  font-size: 0.875rem;
}

.resume-reading-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

.resume-reading-btn:active {
  transform: translateY(0);
}

.resume-icon {
  font-size: 1.25rem;
  line-height: 1;
}

.resume-text {
  display: flex;
  flex-direction: column;
  gap: 0.125rem;
  text-align: left;
}

.resume-text strong {
  font-size: 0.875rem;
  font-weight: 600;
  line-height: 1.3;
}

.resume-text small {
  font-size: 0.75rem;
  opacity: 0.9;
  line-height: 1.2;
}

.resume-close {
  font-size: 1.125rem;
  opacity: 0.7;
  transition: opacity var(--transition-fast);
  padding: 0.125rem 0.25rem;
  margin-left: 0.5rem;
}

.resume-close:hover {
  opacity: 1;
}

/* Scroll Prompt */
/* Scroll Position Prompt - Compact & Subtle */
.scroll-prompt {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.5rem 1rem;
  background: var(--color-background-alt);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  margin-bottom: 1.5rem;
  animation: slideDown 0.3s ease;
  font-size: 0.875rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.scroll-prompt span {
  color: var(--color-text-light);
  font-size: 0.875rem;
  white-space: nowrap;
}

.scroll-prompt-btn {
  padding: 0.375rem 0.875rem;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.8125rem;
  font-weight: 500;
  transition: all var(--transition-fast);
  background: var(--color-accent);
  color: white;
}

.scroll-prompt-btn:hover {
  opacity: 0.9;
}

.scroll-prompt-btn.secondary {
  background: transparent;
  color: var(--color-text-light);
  border: 1px solid var(--color-border);
}

.scroll-prompt-btn.secondary:hover {
  background: var(--color-background);
  color: var(--color-text);
}

/* Animations */
@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes progressPulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.7;
  }
}

/* Progress bar pulse when near completion */
.reading-progress-bar[style*="width: 9"],
.reading-progress-bar[style*="width: 10"] {
  animation: progressPulse 2s ease-in-out infinite;
}

/* Dark Mode Adjustments */
html[data-theme="dark"] .reading-progress-container {
  background: var(--color-background);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

html[data-theme="dark"] .reading-progress-text {
  background: var(--color-background);
  color: var(--color-text-light);
}

html[data-theme="dark"] .resume-reading-btn {
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.4);
}

html[data-theme="dark"] .resume-reading-btn:hover {
  box-shadow: 0 10px 15px rgba(0, 0, 0, 0.5);
}

html[data-theme="dark"] .scroll-prompt {
  background: var(--color-background-alt);
  border-color: var(--color-border);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

html[data-theme="dark"] .scroll-prompt span {
  color: var(--color-text-light);
}

html[data-theme="dark"] .scroll-prompt-btn.secondary {
  background: transparent;
  color: var(--color-text-light);
  border-color: var(--color-border);
}

html[data-theme="dark"] .scroll-prompt-btn.secondary:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--color-text);
}

/* Responsive Design */
@media (max-width: 768px) {
  .reading-progress-container {
    height: 3px;
  }

  .reading-progress-text {
    right: 0.5rem;
    font-size: 0.7rem;
    padding: 0.2rem 0.4rem;
  }

  .resume-reading-btn {
    padding: 0.75rem;
  }

  .resume-text {
    gap: 0.25rem;
  }

  .resume-close {
    margin-left: 0.25rem;
  }

  .scroll-prompt {
    flex-direction: column;
    gap: 0.75rem;
    padding: 1rem;
  }

  .scroll-prompt span {
    text-align: center;
  }

  .scroll-prompt-btn {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .resume-reading-btn {
    padding: 0.625rem 0.875rem;
  }

  .resume-icon {
    font-size: 1.125rem;
  }

  .resume-text strong {
    font-size: 0.8125rem;
  }

  .resume-text small {
    font-size: 0.6875rem;
  }
}

/* Print styles */
@media print {
  .reading-progress-container,
  .resume-reading-btn,
  .scroll-prompt {
    display: none;
  }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  .reading-progress-bar,
  .resume-reading-btn,
  .scroll-prompt {
    animation: none;
    transition: none;
  }
  
  .resume-reading-btn:hover,
  .scroll-prompt-btn:hover {
    transform: none;
  }
}

/* High contrast mode */
@media (prefers-contrast: high) {
  .reading-progress-bar {
    background: var(--color-accent);
  }
  
  .resume-reading-btn {
    border: 2px solid white;
  }
}

/* Screen reader only content */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* Progress indicator in chapter menu */
.chapter-progress {
  display: inline-block;
  width: 40px;
  height: 4px;
  background: var(--color-border);
  border-radius: 2px;
  overflow: hidden;
  margin-left: 0.5rem;
  vertical-align: middle;
}

.chapter-progress-bar {
  height: 100%;
  background: var(--color-accent);
  width: 0%;
  transition: width 0.3s ease;
}

/* Bookmark icon in chapter menu */
.chapter-bookmarked::after {
  content: '📖';
  margin-left: 0.5rem;
  font-size: 0.875rem;
}