/* Reader View Styles - Scientifically Optimized for Reading Performance */

.reader-text {
  font-family: var(--selected-font);
  font-size: var(--reader-font-size);
  line-height: var(--reader-line-height); /* Scientifically proven 1.65 */
  color: var(--text-primary);
  text-align: justify;                    /* Better for long-form reading */
  hyphens: auto;                         /* Prevents awkward spacing */
  word-wrap: break-word;
  max-width: var(--reader-max-width);   /* 42rem optimal reading width */
  margin: 0 auto;                       /* Center for eye comfort */
  letter-spacing: var(--reader-letter-spacing);
}

/* Reading container with eye comfort background */
.reader-content {
  background: var(--bg-primary);         /* #fafafa - scientifically proven */
  color: var(--text-primary);           /* #2c2c2c - ~7:1 contrast ratio */
  padding: var(--space-6);
  border-radius: 12px;
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.04);
}

/* Interactive words */
.interactive-word {
  cursor: pointer;
  border-radius: 4px;
  padding: 2px 3px; /* Slightly larger for better mobile touch */
  margin: 0 1px;
  transition: all var(--ms-duration-fast) var(--curve-spring);
}

/* Saved words indication */
.interactive-word.word-saved {
  border-bottom: 2px dotted var(--apple-blue);
  background-color: rgba(0, 122, 255, 0.05);
}

/* Hover state for saved words */
.interactive-word.word-saved:hover {
  background-color: rgba(0, 122, 255, 0.15);
  border-bottom-style: solid;
}

/* TEMPORARY FIX: Test for text clipping issue (Причина №3) */
.page {
  overflow: visible !important;
}

.page-content {
  overflow: visible !important;
}

.reading-paragraph {
  overflow: visible !important;
  height: auto !important;
}

.interactive-word:hover {
  background: rgba(0, 122, 255, 0.08);
  color: var(--apple-blue);
  transform: translateY(-1px);
}

.interactive-word:focus {
  outline: none;
  background: rgba(0, 122, 255, 0.12);
  box-shadow: 0 0 0 2px rgba(0, 122, 255, 0.2);
}

.interactive-word:active {
  background: rgba(0, 122, 255, 0.16);
  transform: translateY(0);
}

.book-content h1,
.book-content h2,
.book-content h3,
.book-content h4 {
  color: var(--text-primary);
  margin-top: var(--space-6);
  margin-bottom: var(--space-3);
  font-weight: 600;
  line-height: 1.2;
}

.book-content h1 { font-size: 2.2em; }
.book-content h2 { font-size: 1.8em; }
.book-content h3 { font-size: 1.4em; }
.book-content h4 { font-size: 1.2em; }

.book-content p {
  margin-bottom: var(--space-4);
  text-indent: 1.5em;
}

.book-content p:first-child {
  text-indent: 0;
}

.book-content .book-section {
  margin-bottom: var(--space-8);
  page-break-inside: avoid;
}

.book-content blockquote {
  border-left: 4px solid var(--primary-color);
  padding-left: var(--space-4);
  margin: var(--space-4) var(--space-6);
  font-style: italic;
  color: var(--text-secondary);
}

.book-content em,
.book-content i {
  font-style: italic;
  color: var(--primary-color);
}

.book-content strong,
.book-content b {
  font-weight: 600;
  color: var(--text-primary);
}

.book-content code {
  background: var(--bg-secondary);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: 'Monaco', 'Consolas', monospace;
  font-size: 0.9em;
}

.book-content .stanza {
  margin: var(--space-4) 0;
  text-align: center;
  font-style: italic;
}

.book-content .line {
  margin: var(--space-1) 0;
}

.book-content hr {
  border: none;
  border-top: 1px solid var(--border-color);
  margin: var(--space-6) 0;
}

.book-content img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  margin: var(--space-4) 0;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  /* Fix for EPUB images not blocking text rendering */
  display: block !important;
  float: none !important;
  position: static !important;
  clear: both !important;
}

/* Ensure text after images is properly displayed */
.book-content img + *,
.book-content image + * {
  display: block !important;
  clear: both !important;
}

/* Fix paragraphs containing images */
.book-content p:has(img),
.book-content p:has(image) {
  display: block !important;
  clear: both !important;
  overflow: visible !important; /* Prevent content from being hidden */
}

/* Prevent container collapse and content disappearing */
.book-content p {
  overflow: visible !important;
  display: block !important;
}

/* Magic bullet for disappearing content */
.book-content::after {
  content: "";
  display: table;
  clear: both;
}

.book-content .reader-content {
  overflow: visible !important;
}

/* Ensure proper line height and spacing */
.book-content .epub-image + * {
  margin-top: 0.5rem;
}

/* Image container and EPUB image styling */
.image-container {
  margin: 1.5rem 0;
  text-align: center;
  animation: slideInUp 0.6s ease-out both;
  animation-delay: calc(var(--block-index, 0) * 0.1s);
}

.book-content .epub-image {
  display: block !important;
  margin: 1rem auto !important;
  max-width: 100% !important;
  height: auto !important;
  border-radius: 12px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
  transition: all 0.3s ease;
  background-color: #f8f9fa;
  opacity: 1; /* ✅ VISIBLE by default (safety net) */
  transform: scale(0.95);
}

.book-content .epub-image:hover {
  transform: scale(1.02);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

/* Image loaded successfully */
.book-content .epub-image.loaded {
  opacity: 1;
  transform: scale(1);
}

/* Image loading failed */
.book-content .epub-image.image-error {
  opacity: 1;
  transform: scale(1);
  background-color: #fee;
  border: 2px solid #fcc;
  position: relative;
  filter: grayscale(0.5);
}

.book-content .epub-image.image-error::after {
  content: '⚠️ Image failed to load';
  position: absolute;
  bottom: 8px;
  left: 8px;
  background: rgba(255, 255, 255, 0.9);
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 12px;
  color: #c33;
  font-weight: 500;
}

.image-placeholder {
  padding: 2rem;
  background: rgba(0, 0, 0, 0.05);
  border: 2px dashed rgba(0, 0, 0, 0.1);
  border-radius: 8px;
  color: var(--text-tertiary);
  font-style: italic;
  text-align: center;
  animation: slideInUp 0.6s ease-out both;
  animation-delay: calc(var(--block-index, 0) * 0.1s);
}

.image-caption {
  margin-top: 0.5rem;
  font-size: var(--fs-caption-1);
  color: var(--text-tertiary);
  font-style: italic;
  text-align: center;
}

.book-content .epub-image.loaded {
  opacity: 1;
}

/* For inline images (icons, small graphics) */
.book-content .epub-image.inline-image {
  display: inline-block !important;
  margin: 0 0.25rem !important;
  vertical-align: middle;
  min-height: auto;
  box-shadow: none;
}

.book-content a {
  color: var(--primary-color);
  text-decoration: underline;
}

.book-content a:hover {
  opacity: 0.8;
}

/* Navigation */
.book-navigation {
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: 1px solid var(--border-color);
}

.book-navigation h3 {
  font-size: var(--fs-h3);
  margin-bottom: var(--space-3);
  color: var(--text-primary);
}

.book-navigation ol {
  padding-left: var(--space-4);
}

.book-navigation li {
  margin-bottom: var(--space-1);
}

.book-navigation a {
  color: var(--primary-color);
  text-decoration: none;
  transition: color 0.2s;
}

.book-navigation a:hover {
  color: var(--accent-color);
}

/* Reading Progress (future feature) */
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--bg-secondary);
  z-index: 100;
}

.reading-progress-fill {
  height: 100%;
  background: var(--primary-color);
  transition: width 0.3s ease;
}

/* Print styles */
@media print {
  .book-content {
    font-size: 12pt;
    line-height: 1.4;
  }

  .book-content h1,
  .book-content h2,
  .book-content h3,
  .book-content h4 {
    page-break-after: avoid;
  }

  .book-content .book-section {
    page-break-inside: avoid;
  }

  .book-content p {
    orphans: 3;
    widows: 3;
  }
}

/* Dark theme adjustments */
[data-theme='dark'] .book-content {
  color: var(--text-primary);
}

[data-theme='dark'] .book-content blockquote {
  border-left-color: var(--accent-color);
}

[data-theme='dark'] .book-content em,
[data-theme='dark'] .book-content i {
  color: var(--accent-color);
}

/* Mobile optimizations */
@media (max-width: 768px) {
  :root {
    --reader-font-size: 16px;
    --reader-max-width: 100%;
  }

  .book-content {
    padding: 0 var(--space-4);
  }

  .book-content p {
    text-indent: 1em;
  }

  .book-content blockquote {
    margin: var(--space-3) var(--space-2);
    padding-left: var(--space-3);
  }
}

/* High contrast mode */
@media (prefers-contrast: high) {
  .book-content {
    color: var(--text-primary);
  }

  .book-content em,
  .book-content i {
    font-weight: 600;
  }

  .book-content strong,
  .book-content b {
    text-decoration: underline;
  }
}

/* Context styles */
.word-context {
  margin-top: var(--space-3);
  padding-top: var(--space-3);
  border-top: 1px solid var(--separator-color);
  max-height: 200px;
  overflow-y: auto;
}

.context-header {
  margin-bottom: var(--space-2);
}

.context-label {
  font-size: var(--fs-caption-2);
  color: var(--text-quaternary);
  text-transform: uppercase;
  letter-spacing: 0.02em;
  font-weight: 500;
}

.context-source {
  font-size: var(--fs-body);
  color: var(--text-secondary);
  line-height: var(--line-height-normal);
  margin-bottom: var(--space-2);
  font-style: italic;
  max-height: 80px;
  overflow-y: auto;
}

.context-highlight {
  background: rgba(255, 193, 7, 0.2);
  padding: 1px 3px;
  border-radius: 3px;
  font-weight: 600;
}

.context-translation {
  font-size: var(--fs-body);
  color: var(--text-primary);
  line-height: var(--line-height-normal);
  font-weight: 500;
}

/* Dark theme for context */
[data-theme='dark'] .word-context {
  border-top-color: rgba(255, 255, 255, 0.1);
}

[data-theme='dark'] .context-label {
  color: rgba(255, 255, 255, 0.6);
}

[data-theme='dark'] .context-source {
  color: rgba(255, 255, 255, 0.7);
}

[data-theme='dark'] .context-highlight {
  background: rgba(255, 193, 7, 0.3);
}

[data-theme='dark'] .context-translation {
  color: rgba(255, 255, 255, 0.9);
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .book-content * {
    animation: none !important;
    transition: none !important;
  }
}

/* 1. ЗАЩИТА ОТ ОБРЕЗАНИЯ (Safety Net) */
.book-content p {
  overflow: visible !important;
  text-indent: 1.5em;
}

/* 2. КОРРЕКЦИЯ ДЛЯ ДИАЛОГОВ */
.book-content p.para-starts-with-quote {
  text-indent: 0.8em !important;
}

/* 3. МОБИЛЬНАЯ АДАПТАЦИЯ */
@media (max-width: 768px) {
  .book-content p.para-starts-with-quote {
    text-indent: 0.6em !important;
  }
}