/**
 * Novel Theme - Responsive Styles
 * Media queries for responsive design, print styles
 */

/* Responsive - Tablet */
@media (max-width: 900px) {
  .sidebar {
    transform: translateX(-100%);
    box-shadow: 2px 0 8px var(--shadow);
  }

  .sidebar.visible {
    transform: translateX(0);
  }

  .main-content {
    margin-left: 0;
  }
}

/* Responsive - Mobile */
@media (max-width: 600px) {
  html {
    font-size: 16px;
  }

  .reader-header {
    padding: 0 0.75rem;
  }

  .content {
    padding: 0 0.5rem;
  }

  h1 {
    font-size: 1.5rem;
  }

  h2 {
    font-size: 1.25rem;
  }

  .font-controls {
    display: none;
  }

  .nav-footer {
    flex-direction: column;
    gap: 1rem;
  }

  .nav-prev, .nav-next {
    width: 100%;
    justify-content: center;
  }

  /* Hide header nav text on small screens */
  .header-nav-btn span {
    display: none;
  }

  .header-nav-btn {
    padding: 0.375rem;
  }
}

/* Mobile FAB (Floating Action Button) Group */
.fab-group {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  display: none; /* Hidden on desktop */
  flex-direction: column;
  gap: 0.75rem;
  z-index: 1000;
}

@media (max-width: 768px) {
  .fab-group {
    display: flex;
  }
}

.fab {
  width: 48px;
  height: 48px;
  min-width: 48px;
  min-height: 48px;
  border-radius: 50%;
  background: var(--accent);
  color: white;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px var(--shadow);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  text-decoration: none;
}

.fab:hover {
  transform: scale(1.05);
  box-shadow: 0 6px 16px var(--shadow);
}

.fab:active {
  transform: scale(0.95);
}

.fab svg {
  pointer-events: none;
}

/* FAB variants */
.fab-menu {
  background: var(--accent);
}

.fab-prev,
.fab-next {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.fab-prev:hover,
.fab-next:hover {
  background: var(--bg-tertiary);
}

/* Bottom Sheet */
.bottom-sheet {
  position: fixed;
  inset: 0;
  z-index: 2000;
  pointer-events: none;
  display: none;
}

.bottom-sheet[aria-hidden="false"] {
  display: block;
  pointer-events: auto;
}

.bottom-sheet-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.bottom-sheet[aria-hidden="false"] .bottom-sheet-backdrop {
  opacity: 1;
}

.bottom-sheet-container {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  max-height: 85vh;
  background: var(--bg-primary);
  border-radius: 1rem 1rem 0 0;
  box-shadow: 0 -4px 16px var(--shadow);
  transform: translateY(100%);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.bottom-sheet[aria-hidden="false"] .bottom-sheet-container {
  transform: translateY(0);
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  .bottom-sheet-backdrop,
  .bottom-sheet-container,
  .fab {
    transition: none;
  }
}

.bottom-sheet-handle {
  padding: 0.75rem;
  display: flex;
  justify-content: center;
  cursor: grab;
  flex-shrink: 0;
}

.bottom-sheet-handle:active {
  cursor: grabbing;
}

.handle-bar {
  width: 3rem;
  height: 0.25rem;
  background: var(--text-muted);
  border-radius: 0.125rem;
  opacity: 0.5;
}

.bottom-sheet-content {
  overflow-y: auto;
  overflow-x: hidden;
  padding: 0 1rem 1.5rem 1rem;
  flex: 1;
  -webkit-overflow-scrolling: touch;
}

/* Clone sidebar styles for bottom sheet */
.bottom-sheet-content .toc-section {
  margin-top: 1.5rem;
}

.bottom-sheet-content .toc-title {
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.75rem;
}

.bottom-sheet-content .toc {
  list-style: none;
  padding: 0;
  margin: 0;
}

.bottom-sheet-content .toc a {
  display: block;
  padding: 0.5rem 0.75rem;
  color: var(--text-primary);
  text-decoration: none;
  border-radius: 0.375rem;
  transition: background 0.15s ease;
}

.bottom-sheet-content .toc a:hover {
  background: var(--bg-secondary);
}

/* Hide desktop sidebar on mobile when bottom sheet is active */
@media (max-width: 768px) {
  .sidebar {
    display: none;
  }
}

/* Print styles */
@media print {
  .reader-header,
  .sidebar,
  .nav-footer,
  .font-controls,
  #theme-toggle,
  #sidebar-toggle,
  .fab-group,
  .bottom-sheet {
    display: none !important;
  }

  .main-content {
    margin-left: 0;
  }

  body {
    background: white;
    color: black;
  }

  a {
    color: inherit;
    text-decoration: underline;
  }

  pre {
    border: 1px solid #ddd;
  }
}