:root {
  --color-text-detail: #111;
  --color-background-detail:#fff5fb ;
  --font-size-detail: 16px;
}

.dark-mode {
  --color-text-detail: #fff;
  --color-background-detail: #111;
  --font-size-detail: 16px;
}

.wrap-detail-chapter {
  background-color: var(--color-background-detail);
  font-size: var(--font-size-detail);
}
.wrap-detail-chapter .tool {
  display: flex;
  flex-direction: column;
  gap: 10px;
  position: fixed;
  bottom: 200px;
  right: 20px;
}
.wrap-detail-chapter .tool .btn-tool {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--color-background-detail);
  background-color: var(--color-text-detail);
  display: flex;
  align-items: center;
  justify-content: center;
}
.wrap-detail-chapter .tool .btn-tool i {
  font-size: 16px;
  color: var(--color-background-detail);
}
.wrap-detail-chapter .title-chapter {
  text-align: center;
  font-size: 18px;
  margin-bottom: 20px;
}
.wrap-detail-chapter * {
  color: var(--color-text-detail);
}