#menu-button {
  width: 1.75rem;
  height: 1.75rem;
  display: flex;
  align-items: center;
  background-color: #8d9299;
  -webkit-mask-image: url("../img/icon/icon-dropdown-menu.svg");
  -webkit-mask-size: 100%;
  -webkit-mask-repeat: no-repeat;
  -webkit-mask-position: center center;
  mask-image: url("../img/icon/icon-dropdown-menu.svg");
  mask-size: 100%;
  mask-repeat: no-repeat;
  mask-position: center center;
}
#menu-button:hover,
#menu-button.active {
  background-color: #121314;
}

#search-button {
  width: 1.5rem;
  height: 1.5rem;
  align-items: center;
  background-color: #8d9299;
  -webkit-mask-image: url("../img/icon/icon-search.svg");
  -webkit-mask-size: 100%;
  -webkit-mask-repeat: no-repeat;
  -webkit-mask-position: center center;
  mask-image: url("../img/icon/icon-search.svg");
  mask-size: 100%;
  mask-repeat: no-repeat;
  mask-position: center center;
}
#search-button:hover,
#search-button.active {
  background-color: #121314;
}

.search-inp-btn {
  width: 1.3125rem;
  height: 1.3125rem;
  display: flex;
  align-items: center;
  background-color: #d9dbe0;
  -webkit-mask-image: url("../img/icon/icon-search.svg");
  -webkit-mask-size: 100%;
  -webkit-mask-repeat: no-repeat;
  -webkit-mask-position: center center;
  mask-image: url("../img/icon/icon-search.svg");
  mask-size: 100%;
  mask-repeat: no-repeat;
  mask-position: center center;
}
@media screen and (min-width: 768px) {
  .search-inp-btn {
    background-color: #47494d;
  }
}
.search-inp-btn:hover,
.search-inp-btn.active {
  background-color: #47494d;
}

.reset-inp-btn {
  width: 1rem;
  height: 1rem;
  display: flex;
  align-items: center;
  background-color: #d9dbe0;
  border-radius: 50%;
}
.reset-inp-btn::after {
  content: "";
  width: 100%;
  height: 100%;
  background-color: #f3f5fa;
  -webkit-mask-image: url("../img/icon/icon-X.svg");
  -webkit-mask-size: 100%;
  -webkit-mask-repeat: no-repeat;
  -webkit-mask-position: center center;
  mask-image: url("../img/icon/icon-X.svg");
  mask-size: 100%;
  mask-repeat: no-repeat;
  mask-position: center center;
}
.reset-inp-btn:hover,
.reset-inp-btn.active {
  background-color: #47494d;
}

#copy-button {
  width: 2.625rem;
  height: 2.625rem;
  display: flex;
  align-items: center;
  justify-content: center;
}
#copy-button:hover::after,
#copy-button.active::after {
  background-color: #121314;
}
#copy-button::after {
  content: "";
  width: 100%;
  height: 100%;
  background-color: #8d9299;
  -webkit-mask-image: url("../img/icon/icon-copy.svg");
  -webkit-mask-size: 100%;
  -webkit-mask-repeat: no-repeat;
  -webkit-mask-position: center center;
  mask-image: url("../img/icon/icon-copy.svg");
  mask-size: 100%;
  mask-repeat: no-repeat;
  mask-position: center center;
}

#aside-button {
  margin-left: auto;
  width: fit-content;
  height: fit-content;
  display: flex;
  align-items: center;
  justify-content: center;
}
#aside-button:active,
#aside-button:focus {
  outline: none;
}
#aside-button::after {
  content: "";
  width: 24px;
  height: 24px;
  margin: 13px;
  border: 1px solid red;
  background-color: #47494d;
  -webkit-mask-image: url("../img/icon/icon-chapter.svg");
  -webkit-mask-size: 100%;
  -webkit-mask-repeat: no-repeat;
  -webkit-mask-position: center center;
  mask-image: url("../img/icon/icon-chapter.svg");
  mask-size: 100%;
  mask-repeat: no-repeat;
  mask-position: center center;
}

.active #aside-button::after {
  background-color: #8d9299;
  -webkit-mask-image: url("../img/icon/icon-side-close-right.svg");
  -webkit-mask-size: 100%;
  -webkit-mask-repeat: no-repeat;
  -webkit-mask-position: center center;
  mask-image: url("../img/icon/icon-side-close-right.svg");
  mask-size: 100%;
  mask-repeat: no-repeat;
  mask-position: center center;
}

#page-prev {
  display: flex;
}
#page-prev::after {
  content: "";
  width: 20px;
  height: 20px;
  background-color: #8d9299;
  -webkit-mask-image: url("../img/icon/icon-prev.svg");
  -webkit-mask-size: 100%;
  -webkit-mask-repeat: no-repeat;
  -webkit-mask-position: center center;
  mask-image: url("../img/icon/icon-prev.svg");
  mask-size: 100%;
  mask-repeat: no-repeat;
  mask-position: center center;
}
#page-prev:hover::after {
  background-color: #47494d;
  -webkit-mask-image: url("../img/icon/icon-prev.svg");
  -webkit-mask-size: 100%;
  -webkit-mask-repeat: no-repeat;
  -webkit-mask-position: center center;
  mask-image: url("../img/icon/icon-prev.svg");
  mask-size: 100%;
  mask-repeat: no-repeat;
  mask-position: center center;
}
#page-prev:disabled::after {
  background-color: #d9dbe0;
  -webkit-mask-image: url("../img/icon/icon-prev.svg");
  -webkit-mask-size: 100%;
  -webkit-mask-repeat: no-repeat;
  -webkit-mask-position: center center;
  mask-image: url("../img/icon/icon-prev.svg");
  mask-size: 100%;
  mask-repeat: no-repeat;
  mask-position: center center;
}

#page-next {
  display: flex;
}
#page-next::after {
  content: "";
  width: 20px;
  height: 20px;
  background-color: #8d9299;
  -webkit-mask-image: url("../img/icon/icon-next.svg");
  -webkit-mask-size: 100%;
  -webkit-mask-repeat: no-repeat;
  -webkit-mask-position: center center;
  mask-image: url("../img/icon/icon-next.svg");
  mask-size: 100%;
  mask-repeat: no-repeat;
  mask-position: center center;
}
#page-next:hover::after {
  background-color: #47494d;
  -webkit-mask-image: url("../img/icon/icon-next.svg");
  -webkit-mask-size: 100%;
  -webkit-mask-repeat: no-repeat;
  -webkit-mask-position: center center;
  mask-image: url("../img/icon/icon-next.svg");
  mask-size: 100%;
  mask-repeat: no-repeat;
  mask-position: center center;
}
#page-next:disabled::after {
  background-color: #d9dbe0;
  -webkit-mask-image: url("../img/icon/icon-next.svg");
  -webkit-mask-size: 100%;
  -webkit-mask-repeat: no-repeat;
  -webkit-mask-position: center center;
  mask-image: url("../img/icon/icon-next.svg");
  mask-size: 100%;
  mask-repeat: no-repeat;
  mask-position: center center;
}

/* Keep paragraph text inline inside list items within rendered content. */
#contents ul > li > p,
#contents ol > li > p {
  display: inline;
  margin: 0;
}

.category-toggle-button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  width: 4rem;
  height: 4rem;
  padding: 0;
  margin-left: 0.8rem;
  border: 0;
  border-radius: 0;
  color: #47494d;
  background: transparent;
  box-shadow: none;
  appearance: none;
  transition: filter 0.2s ease, transform 0.2s ease;
}

.category-toggle-button:hover,
.category-toggle-button.is-active {
  color: #121314;
  background: transparent;
  filter: none;
  transform: translateY(-1px);
}

.category-toggle-icon,
.category-toggle-icon::before,
.category-toggle-icon::after {
  display: block;
  width: 24px;
  height: 3px;
  border-radius: 99px;
  background: currentColor;
}

.category-toggle-icon {
  position: relative;
}

.category-toggle-icon::before,
.category-toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
}

.category-toggle-icon::before {
  top: -8px;
}

.category-toggle-icon::after {
  top: 8px;
}

.category-toggle-button.is-hidden {
  display: none !important;
}

.category-overview-overlay {
  position: fixed;
  inset: 0;
  z-index: 120;
  background: color-mix(in srgb, var(--text-main) 18%, transparent);
  backdrop-filter: blur(6px);
}

.category-overview-panel {
  width: min(430px, 88vw);
  height: 100%;
  padding: 1.75rem 1.4rem 1.5rem;
  border-right: 1px solid color-mix(in srgb, var(--border-strong) 86%, white 14%);
  background:
    radial-gradient(780px 420px at -10% -12%, rgba(46, 111, 242, 0.12), transparent 62%),
    linear-gradient(
      180deg,
      color-mix(in srgb, var(--surface-strong) 92%, white 8%) 0%,
      color-mix(in srgb, var(--surface) 96%, #f8fbff 4%) 100%
    );
  box-shadow: 24px 0 60px rgba(23, 32, 51, 0.16);
  transform: translateX(-100%);
  transition: transform 0.22s ease;
}

.category-overview-overlay.is-open .category-overview-panel {
  transform: translateX(0);
}

.category-overview-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.category-overview-title {
  margin: 0;
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text-main);
}

.category-overview-close {
  width: 2rem;
  height: 2rem;
  border-radius: 999px;
  border: 1px solid color-mix(in srgb, var(--border) 88%, white 12%);
  background: color-mix(in srgb, var(--surface) 96%, white 4%);
  position: relative;
  transition: background-color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.category-overview-close::before,
.category-overview-close::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 14px;
  height: 2px;
  border-radius: 99px;
  background: color-mix(in srgb, var(--text-subtle) 88%, var(--text-main) 12%);
}

.category-overview-close::before {
  transform: translate(-50%, -50%) rotate(45deg);
}

.category-overview-close::after {
  transform: translate(-50%, -50%) rotate(-45deg);
}

.category-overview-close:hover,
.category-overview-close:focus-visible {
  border-color: var(--border-strong);
  background: color-mix(in srgb, var(--accent-soft) 72%, white 28%);
  transform: translateY(-1px);
}

.site-nav-actions {
  margin-left: 1rem;
  display: flex;
  align-items: center;
  gap: 0.55rem;
  position: relative;
}

.site-search-shell {
  position: relative;
  display: flex;
  align-items: center;
}

#menu-button,
#search-button {
  background-color: var(--control-icon);
  transition: background-color 0.2s ease;
}

#menu-button:hover,
#menu-button.active,
#search-button:hover,
#search-button.active {
  background-color: var(--control-icon-strong);
}

.search-cont {
  margin-left: 0;
}

.search-input {
  color: var(--text-main);
  background: color-mix(in srgb, var(--page-bg-strong) 92%, white 8%) !important;
}

.search-input::placeholder {
  color: var(--text-soft);
}

.theme-toggle-button,
.category-toggle-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  height: 2.85rem;
  padding: 0 0.95rem;
  border: 1px solid var(--control-border);
  border-radius: 999px;
  background: var(--control-bg);
  color: var(--control-icon);
  box-shadow: var(--control-shadow);
  white-space: nowrap;
  flex-shrink: 0;
  transition:
    background-color 0.2s ease,
    border-color 0.2s ease,
    color 0.2s ease,
    transform 0.2s ease,
    box-shadow 0.2s ease;
}

.theme-toggle-button:hover,
.theme-toggle-button:focus-visible,
.category-toggle-button:hover,
.category-toggle-button.is-active,
.category-toggle-button:focus-visible {
  background: var(--control-bg-hover);
  border-color: var(--border-strong);
  transform: translateY(-1px);
}

.theme-toggle-button:focus-visible,
.category-toggle-button:focus-visible {
  outline: 0;
}

.theme-toggle-glyph {
  position: relative;
  width: 1.5rem;
  height: 1.5rem;
  flex: 0 0 1.5rem;
}

.theme-icon {
  position: absolute;
  inset: 0;
  color: currentColor;
  transform-origin: center;
  transition: opacity 0.24s ease, transform 0.24s ease;
}

.theme-icon-sun {
  background: currentColor;
  -webkit-mask-image: url("../img/icon/icon-theme-sun.svg");
  -webkit-mask-size: 100%;
  -webkit-mask-repeat: no-repeat;
  -webkit-mask-position: center;
  mask-image: url("../img/icon/icon-theme-sun.svg");
  mask-size: 100%;
  mask-repeat: no-repeat;
  mask-position: center;
}

.theme-icon-moon::before,
.theme-icon-moon::after {
  content: "";
  position: absolute;
  border-radius: 50%;
}

.theme-icon-moon::before {
  inset: 0.12rem 0.16rem 0.16rem 0.16rem;
  background: currentColor;
  -webkit-mask:
    radial-gradient(circle at 78% 34%, transparent 0 0.46rem, #000 0.48rem);
  mask:
    radial-gradient(circle at 78% 34%, transparent 0 0.46rem, #000 0.48rem);
}

:root[data-theme="light"] .theme-icon-moon,
:root:not([data-theme="dark"]) .theme-icon-moon {
  opacity: 1;
  transform: scale(1);
}

:root[data-theme="light"] .theme-icon-sun,
:root:not([data-theme="dark"]) .theme-icon-sun {
  opacity: 0;
  transform: scale(0.7);
}

:root[data-theme="dark"] .theme-icon-moon {
  opacity: 0;
  transform: scale(0.7);
}

:root[data-theme="dark"] .theme-icon-sun {
  opacity: 1;
  transform: scale(1);
}

.theme-toggle-text {
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text-main);
  white-space: nowrap;
}

.category-toggle-button {
  width: 2.85rem;
  padding: 0;
  margin-left: 0;
}

.category-toggle-icon,
.category-toggle-icon::before,
.category-toggle-icon::after {
  width: 18px;
  height: 2px;
}

.category-toggle-icon::before {
  top: -6px;
}

.category-toggle-icon::after {
  top: 6px;
}

:root[data-theme="dark"] #mobileMenu,
:root[data-theme="dark"] .search-cont {
  background: var(--surface-strong) !important;
  border-color: var(--border) !important;
}

@media screen and (max-width: 980px) {
  .site-nav-actions {
    gap: 0.45rem;
  }

  .theme-toggle-button {
    width: 2.85rem;
    padding: 0;
    gap: 0;
  }

  .theme-toggle-text {
    display: none;
  }
}

@media screen and (max-width: 768px) {
  .legacy-mobile-menu-trigger {
    display: none;
  }

  .site-nav-actions {
    gap: 0.45rem;
    margin-left: 0.55rem;
  }

  .theme-toggle-button,
  .category-toggle-button {
    width: 2.75rem;
    height: 2.75rem;
    padding: 0;
  }

  .theme-toggle-text {
    display: none;
  }
}

.category-overview-list {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  max-height: calc(100vh - 9rem);
  overflow-y: auto;
  padding-right: 0.4rem;
}

.category-overview-list .sidebar-category-item {
  background: color-mix(in srgb, var(--surface-strong) 86%, #f6f9ff 14%);
  border-color: color-mix(in srgb, var(--border) 82%, white 18%);
  box-shadow: 0 10px 24px rgba(23, 32, 51, 0.06);
}

.category-overview-list .sidebar-category-item:hover,
.category-overview-list .sidebar-category-item.is-active {
  border-color: color-mix(in srgb, var(--accent) 26%, var(--border-strong) 74%);
  background: color-mix(in srgb, var(--accent-soft) 78%, white 22%);
  box-shadow: 0 16px 30px rgba(46, 111, 242, 0.12);
}

.category-overview-list .sidebar-category-name {
  color: var(--text-main);
}

.category-overview-list .sidebar-category-count {
  color: var(--text-subtle);
}

:root[data-theme="dark"] .category-overview-overlay {
  background: rgba(10, 14, 20, 0.46);
  backdrop-filter: blur(2px);
}

:root[data-theme="dark"] .category-overview-panel {
  border-right: 1px solid rgba(255, 255, 255, 0.12);
  background:
    radial-gradient(1200px 600px at -15% -20%, rgba(59, 128, 255, 0.2), transparent 60%),
    linear-gradient(180deg, #181b22 0%, #12151d 100%);
  box-shadow: 24px 0 60px rgba(0, 0, 0, 0.32);
}

:root[data-theme="dark"] .category-overview-close {
  border-color: rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.04);
}

:root[data-theme="dark"] .category-overview-close::before,
:root[data-theme="dark"] .category-overview-close::after {
  background: #dce2ee;
}

:root[data-theme="dark"] .category-overview-close:hover,
:root[data-theme="dark"] .category-overview-close:focus-visible {
  border-color: rgba(122, 166, 255, 0.34);
  background: rgba(122, 166, 255, 0.14);
}

:root[data-theme="dark"] .category-overview-list .sidebar-category-item {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.09);
  box-shadow: none;
}

:root[data-theme="dark"] .category-overview-list .sidebar-category-item:hover,
:root[data-theme="dark"] .category-overview-list .sidebar-category-item.is-active {
  border-color: rgba(120, 181, 255, 0.4);
  background: rgba(120, 181, 255, 0.14);
  box-shadow: none;
}

:root[data-theme="dark"] .category-overview-list .sidebar-category-name {
  color: #f2f5fc;
}

:root[data-theme="dark"] .category-overview-list .sidebar-category-count {
  color: #adb8cb;
}

@media screen and (max-width: 767px) {
  .category-overview-title {
    font-size: 1.35rem;
  }
}