.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.6rem 1rem;
  padding-top: max(0.6rem, env(safe-area-inset-top));
  background: rgba(26, 21, 16, 0.85);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(201, 169, 98, 0.15);
  flex-shrink: 0;
  z-index: 20;
  transition: transform 0.35s ease, opacity 0.35s ease;
}

.toolbar-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.toolbar-group--center {
  flex: 1;
  justify-content: center;
}

.toolbar-title {
  font-family: "Songti SC", "Noto Serif SC", serif;
  font-size: 0.9rem;
  color: #c9a962;
  letter-spacing: 0.1em;
  display: none;
}

@media (min-width: 480px) {
  .toolbar-title {
    display: inline;
  }
}

.page-indicator {
  font-size: 0.85rem;
  color: rgba(244, 234, 213, 0.8);
  font-variant-numeric: tabular-nums;
  min-width: 4rem;
  text-align: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.45rem 0.75rem;
  border-radius: 4px;
  font-size: 0.8rem;
  color: rgba(244, 234, 213, 0.85);
  transition: background 0.2s, color 0.2s;
}

.btn:hover {
  background: rgba(201, 169, 98, 0.15);
  color: #f4ead5;
}

.btn--icon {
  padding: 0.45rem;
  border-radius: 50%;
}

.btn--toggle {
  padding: 0.35rem 0.55rem;
  font-size: 0.75rem;
  border: 1px solid rgba(201, 169, 98, 0.2);
  border-radius: 3px;
}

.btn--toggle.active {
  background: rgba(201, 169, 98, 0.25);
  border-color: rgba(201, 169, 98, 0.5);
  color: #f4ead5;
}

.orientation-toggle {
  display: flex;
  gap: 2px;
}

.nav-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  padding: 0.6rem 1rem;
  padding-bottom: max(0.6rem, env(safe-area-inset-bottom));
  background: rgba(26, 21, 16, 0.85);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-top: 1px solid rgba(201, 169, 98, 0.15);
  flex-shrink: 0;
  z-index: 20;
  transition: transform 0.35s ease, opacity 0.35s ease;
}

/* Landscape immersive: hide top/bottom chrome */
body.chrome-landscape.chrome-hidden .toolbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  transform: translateY(-100%);
  opacity: 0;
  pointer-events: none;
}

body.chrome-landscape.chrome-hidden .nav-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  transform: translateY(100%);
  opacity: 0;
  pointer-events: none;
}

body.chrome-landscape.chrome-hidden .stage {
  padding-top: max(0.35rem, env(safe-area-inset-top));
  padding-bottom: max(0.35rem, env(safe-area-inset-bottom));
}

body.chrome-landscape:not(.chrome-hidden) .toolbar,
body.chrome-landscape:not(.chrome-hidden) .nav-bar {
  position: relative;
  transform: none;
  opacity: 1;
  pointer-events: auto;
}

.btn--nav {
  min-width: 100px;
  padding: 0.55rem 1rem;
  border: 1px solid rgba(201, 169, 98, 0.25);
  border-radius: 4px;
  font-size: 0.85rem;
}

.btn--nav:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.btn--nav:disabled:hover {
  background: transparent;
  color: rgba(244, 234, 213, 0.85);
}

body.viewport-narrow .nav-bar {
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  padding-bottom: max(0.5rem, env(safe-area-inset-bottom));
}

body.viewport-narrow .btn--nav {
  flex: 1;
  min-width: 0;
  min-height: 48px;
  padding: 0.65rem 0.5rem;
  font-size: 0.9rem;
}

body.viewport-narrow .toolbar {
  padding: 0.5rem 0.75rem;
  padding-top: max(0.5rem, env(safe-area-inset-top));
}

body.viewport-narrow .orientation-toggle .btn--toggle {
  padding: 0.4rem 0.45rem;
  font-size: 0.7rem;
}

/* TOC Dialog */
.toc-dialog {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: min(90vw, 380px);
  max-height: 80vh;
  background: #2a2318;
  border: 1px solid rgba(201, 169, 98, 0.3);
  border-radius: 8px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
  color: #f4ead5;
  overflow: hidden;
}

.toc-dialog[open] {
  display: flex;
  flex-direction: column;
}

.toc-dialog__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid rgba(201, 169, 98, 0.2);
}

.toc-dialog__header h2 {
  font-family: "Songti SC", "Noto Serif SC", serif;
  font-size: 1.1rem;
  font-weight: 600;
  color: #c9a962;
  letter-spacing: 0.1em;
}

.toc-list {
  overflow-y: auto;
  padding: 0.5rem 0;
  flex: 1;
}

.toc-list li button {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  width: 100%;
  padding: 0.65rem 1.25rem;
  text-align: left;
  font-size: 0.9rem;
  color: rgba(244, 234, 213, 0.85);
  transition: background 0.15s;
}

.toc-list li button:hover {
  background: rgba(201, 169, 98, 0.12);
}

.toc-list .toc-num {
  font-size: 0.75rem;
  color: #c9a962;
  min-width: 1.5rem;
  font-variant-numeric: tabular-nums;
}

.toc-list .toc-theme {
  font-size: 0.75rem;
  color: rgba(244, 234, 213, 0.5);
  margin-left: auto;
}