/* =============================================
   ENGLISH UP! — lesson.css
   Lesson viewer, content renderer, print styles
   ============================================= */


/* ══════════════════════════════════════════
   LESSON LAYOUT
   ══════════════════════════════════════════ */

.lesson-layout {
  max-width: 860px;
  margin: 0 auto;
  padding: 0 var(--space-lg) var(--space-3xl);
}

/* Lesson Header */
.lesson-header {
  margin-bottom: var(--space-xl);
}

.lesson-breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 600;
  margin-bottom: var(--space-md);
  flex-wrap: wrap;
}

.lesson-breadcrumb__link {
  cursor: pointer;
  transition: color var(--transition-fast);
}

.lesson-breadcrumb__link:hover { color: var(--accent-green); }

.lesson-breadcrumb__sep { opacity: 0.5; }

.lesson-title-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-lg);
  margin-bottom: var(--space-md);
}

.lesson-title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 900;
  color: var(--text-primary);
  line-height: 1.2;
}

.lesson-actions {
  display: flex;
  gap: var(--space-sm);
  flex-shrink: 0;
  flex-wrap: wrap;
}

.lesson-meta-row {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  flex-wrap: wrap;
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--border);
  margin-bottom: var(--space-xl);
}

.lesson-meta-item {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 600;
}

/* Objectives Box */
.lesson-objectives {
  background: var(--accent-blue-light);
  border-left: 4px solid var(--accent-blue);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: var(--space-md) var(--space-lg);
  margin-bottom: var(--space-xl);
}

.lesson-objectives__title {
  font-size: 0.82rem;
  font-weight: 800;
  color: var(--accent-blue);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-sm);
}

.lesson-objectives__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.lesson-objectives__item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  font-size: 0.88rem;
  color: var(--text-primary);
  font-family: var(--font-ui);
  line-height: 1.4;
}

.lesson-objectives__item::before {
  content: '✓';
  color: var(--accent-blue);
  font-weight: 900;
  flex-shrink: 0;
  margin-top: 1px;
}


/* ══════════════════════════════════════════
   LESSON CONTENT RENDERER
   (Applies to both Quill output and uploaded HTML)
   ══════════════════════════════════════════ */

.lesson-content {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  margin-bottom: var(--space-xl);
  box-shadow: var(--shadow-sm);
  line-height: 1.8;
}

/* Typography inside lesson content */
.lesson-content h1,
.lesson-content h2,
.lesson-content h3,
.lesson-content h4 {
  font-family: var(--font-display);
  margin-top: var(--space-xl);
  margin-bottom: var(--space-md);
  color: var(--text-primary);
}

.lesson-content h1 { font-size: 1.7rem; border-bottom: 2px solid var(--border); padding-bottom: var(--space-sm); }
.lesson-content h2 { font-size: 1.3rem; color: var(--accent-green); }
.lesson-content h3 { font-size: 1.1rem; }

.lesson-content p {
  margin-bottom: var(--space-md);
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--text-primary);
  line-height: 1.8;
}

.lesson-content strong {
  font-weight: 800;
  color: var(--text-primary);
}

.lesson-content em {
  color: var(--accent-orange);
  font-style: italic;
}

.lesson-content ul,
.lesson-content ol {
  margin-left: var(--space-xl);
  margin-bottom: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.lesson-content ul { list-style: disc; }
.lesson-content ol { list-style: decimal; }

.lesson-content li {
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--text-primary);
  line-height: 1.6;
  padding-left: var(--space-xs);
}

.lesson-content a {
  color: var(--accent-blue);
  text-decoration: underline;
  font-weight: 600;
}

.lesson-content blockquote {
  border-left: 4px solid var(--accent-orange);
  padding: var(--space-sm) var(--space-lg);
  margin: var(--space-lg) 0;
  background: var(--accent-orange-light);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-style: italic;
  color: var(--text-primary);
}

.lesson-content table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: var(--space-lg);
  font-size: 0.9rem;
}

.lesson-content th {
  background: var(--bg-secondary);
  padding: var(--space-sm) var(--space-md);
  text-align: left;
  font-weight: 800;
  border: 1px solid var(--border);
  color: var(--text-primary);
}

.lesson-content td {
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--border);
  vertical-align: top;
  color: var(--text-primary);
  font-family: var(--font-ui);
}

.lesson-content tr:nth-child(even) td {
  background: var(--bg-secondary);
}

.lesson-content code {
  background: var(--bg-secondary);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  font-family: monospace;
  font-size: 0.88em;
  color: var(--accent-blue);
  border: 1px solid var(--border);
}

.lesson-content pre {
  background: var(--bg-secondary);
  padding: var(--space-md);
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin-bottom: var(--space-md);
  border: 1px solid var(--border);
}

.lesson-content img {
  max-width: 100%;
  border-radius: var(--radius-md);
  margin: var(--space-md) 0;
  box-shadow: var(--shadow-sm);
}

.lesson-content hr {
  border: none;
  border-top: 2px solid var(--border);
  margin: var(--space-xl) 0;
}

/* Special lesson boxes */
.lesson-content .tip-box,
.tip-box {
  background: var(--accent-green-light);
  border-left: 4px solid var(--accent-green);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: var(--space-md) var(--space-lg);
  margin: var(--space-md) 0;
}

.lesson-content .tip-box strong,
.tip-box strong {
  display: block;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent-green);
  margin-bottom: var(--space-xs);
}

.lesson-content .warning-box,
.warning-box {
  background: var(--accent-orange-light);
  border-left: 4px solid var(--accent-orange);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: var(--space-md) var(--space-lg);
  margin: var(--space-md) 0;
}

.lesson-content .example-box,
.example-box {
  background: var(--accent-blue-light);
  border: 1px solid var(--accent-blue);
  border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-lg);
  margin: var(--space-md) 0;
}

.lesson-content .example-box::before,
.example-box::before {
  content: '💡 Example';
  display: block;
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent-blue);
  margin-bottom: var(--space-sm);
}

/* Vocabulary highlight */
.vocab {
  display: inline-block;
  background: var(--accent-yellow);
  color: #3C3C3C;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-weight: 800;
  font-size: 0.9em;
}

/* Pronunciation guide */
.pronunc {
  font-family: monospace;
  font-size: 0.85em;
  color: var(--accent-purple);
  font-style: italic;
}

/* HTML lesson iframe */
.lesson-iframe-wrap {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  margin-bottom: var(--space-xl);
  box-shadow: var(--shadow-sm);
}

.lesson-iframe {
  width: 100%;
  border: none;
  min-height: 600px;
  display: block;
}


/* ══════════════════════════════════════════
   LESSON FOOTER
   ══════════════════════════════════════════ */

.lesson-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  padding: var(--space-lg) var(--space-xl);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  flex-wrap: wrap;
}

.lesson-footer__nav {
  display: flex;
  gap: var(--space-sm);
}

.lesson-complete-btn {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  background: var(--accent-green);
  color: white;
  border-radius: var(--radius-full);
  font-weight: 900;
  font-size: 1rem;
  border-bottom: 4px solid #3fa800;
  transition: all var(--transition-fast);
}

.lesson-complete-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(88,204,2,0.4);
}

.lesson-complete-btn.completed {
  background: var(--bg-secondary);
  color: var(--accent-green);
  border-color: var(--accent-green-light);
}


/* ══════════════════════════════════════════
   PRINT STYLES
   ══════════════════════════════════════════ */

@media print {
  /* Hide all UI chrome */
  .navbar,
  .ai-widget,
  .ai-fab,
  .toast-container,
  .modal-overlay,
  .lesson-footer,
  .lesson-actions,
  .lesson-breadcrumb,
  .btn-primary,
  .btn-secondary,
  .btn-ghost,
  .btn-orange,
  .btn-blue,
  .lesson-complete-btn,
  [data-no-print] {
    display: none !important;
  }

  /* Reset layout */
  body {
    background: white !important;
    color: black !important;
    font-size: 11pt;
  }

  .main-content {
    padding-top: 0 !important;
  }

  .lesson-layout {
    max-width: 100%;
    padding: 0;
  }

  /* Print header */
  .lesson-header {
    margin-bottom: 16pt;
  }

  .lesson-title {
    font-size: 20pt;
    color: black !important;
  }

  .lesson-meta-row {
    font-size: 9pt;
    color: #555 !important;
  }

  /* Content */
  .lesson-content {
    background: white !important;
    border: none !important;
    box-shadow: none !important;
    padding: 0;
    border-radius: 0;
  }

  .lesson-content h1 { font-size: 16pt; page-break-after: avoid; }
  .lesson-content h2 { font-size: 13pt; page-break-after: avoid; color: #2c7a00 !important; }
  .lesson-content h3 { font-size: 11pt; page-break-after: avoid; }

  .lesson-content p,
  .lesson-content li {
    color: black !important;
    font-size: 10.5pt;
    line-height: 1.6;
  }

  .lesson-content table { font-size: 9.5pt; }

  .lesson-content th {
    background: #f0f0f0 !important;
    color: black !important;
  }

  .lesson-content td {
    color: black !important;
    border-color: #ccc !important;
  }

  /* Boxes */
  .lesson-content .tip-box,
  .lesson-content .warning-box,
  .lesson-content .example-box,
  .lesson-objectives {
    border-left-width: 3pt;
    padding: 6pt 10pt;
    page-break-inside: avoid;
  }

  /* Vocab highlight — print-safe */
  .vocab {
    background: #ffe066 !important;
    color: black !important;
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }

  /* Page breaks */
  .lesson-objectives { page-break-inside: avoid; margin-bottom: 16pt; }
  h2, h3 { page-break-after: avoid; }
  table, blockquote { page-break-inside: avoid; }
  img { max-width: 100%; page-break-inside: avoid; }

  /* Branding footer */
  .lesson-layout::after {
    content: 'English Up! — englishup.pages.dev';
    display: block;
    text-align: center;
    font-size: 8pt;
    color: #999;
    margin-top: 24pt;
    padding-top: 8pt;
    border-top: 1pt solid #ddd;
  }

  /* Page setup */
  @page {
    margin: 2cm 2.5cm;
    size: A4;
  }
}