/**
 * Reader Page CSS
 * An Immigrant's Story
 */

/* Reader Page Specific Styles */
.reader-page {
  background-color: var(--color-background);
}

.reader-header {
  background-color: var(--color-primary);
  color: white;
  padding: var(--spacing-md) 0;
  position: sticky; /* Creates positioning context for progress bar */
  top: 0;
  z-index: var(--z-sticky);
  box-shadow: var(--shadow-md);
}

.reader-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.reader-title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: white;
  text-decoration: none;
  margin: 0;
}

.reader-title:hover {
  color: white;
  text-decoration: none;
}

/* Chapter Content Container */
#chapter-content {
  min-height: 60vh;
  transition: opacity var(--transition-base);
}

#chapter-content.loading {
  opacity: 0.5;
}

/* Current Chapter Info */
#current-chapter-info {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  font-weight: 500;
}

/* Sidebar Scrollbar */
.sidebar::-webkit-scrollbar {
  width: 8px;
}

.sidebar::-webkit-scrollbar-track {
  background: var(--color-background-alt);
}

.sidebar::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 4px;
}

.sidebar::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-light);
}

/* Navigation Button Group */
.nav-button-group {
  display: flex;
  gap: var(--spacing-md);
}

/* Navigation Buttons */
.nav-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-lg);
  background-color: var(--color-accent);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.nav-btn:hover:not(:disabled) {
  background-color: var(--color-accent-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

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

.nav-btn-icon {
  font-size: var(--font-size-lg);
}

/* Reading Progress Bar */
.reading-progress {
  position: fixed;
  top: 60px; /* Below header */
  left: 0;
  right: 0;
  height: 3px;
  background-color: var(--color-background-alt);
  z-index: calc(var(--z-sticky) - 1);
}

.reading-progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-success) 100%);
  transition: width 150ms ease;
}

/* Chapter Navigation at Bottom */
.chapter-navigation-bottom {
  margin-top: var(--spacing-3xl);
  padding-top: var(--spacing-2xl);
  border-top: 2px solid var(--color-border);
}

/* Quick Links */
.quick-links {
  display: flex;
  justify-content: center;
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
  padding: var(--spacing-lg);
  background-color: var(--color-background-alt);
  border-radius: var(--radius-md);
}

.quick-link {
  color: var(--color-accent);
  text-decoration: none;
  font-weight: 600;
  transition: color var(--transition-fast);
}

.quick-link:hover {
  color: var(--color-accent-dark);
}

/* Responsive Reader */
@media (max-width: 768px) {
  .reader-header {
    padding: var(--spacing-sm) 0;
  }

  .reader-title {
    font-size: var(--font-size-lg);
  }

  #current-chapter-info {
    display: none;
  }

  .nav-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
  }

  .nav-btn-text {
    display: none;
  }

  .nav-btn-icon {
    font-size: var(--font-size-xl);
  }

  .quick-links {
    flex-direction: column;
    gap: var(--spacing-sm);
  }
}

@media (max-width: 480px) {
  .nav-button-group {
    gap: var(--spacing-sm);
  }

  .nav-btn {
    padding: var(--spacing-sm);
    min-width: 44px;
    justify-content: center;
  }
}

/* Print Styles for Reader */
@media print {
  .reader-header,
  .sidebar,
  .navigation-controls,
  .menu-toggle,
  .quick-links {
    display: none !important;
  }

  .reader-content {
    max-width: 100%;
    padding: 0;
  }

  #chapter-content {
    padding: 0;
  }
}