.knowledge-page {
  --knowledge-panel: rgba(11, 24, 41, 0.82);
  min-height: 100vh;
  background:
    radial-gradient(circle at 82% 8%, rgba(51, 121, 255, 0.1), transparent 29rem),
    linear-gradient(180deg, #06101d 0%, var(--ink) 34rem);
}

.knowledge-hero {
  padding: 8.75rem var(--gutter) 2.5rem;
}

.knowledge-hero-copy {
  max-width: 70rem;
}

.knowledge-hero h1 {
  max-width: 12ch;
  margin-bottom: 1.15rem;
  font-size: clamp(3.4rem, 6.1vw, 6.4rem);
}

.knowledge-intro {
  max-width: 47rem;
}

.knowledge-publisher-note {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  margin-top: 1.35rem;
  padding: 0;
  border: 0;
  background: transparent;
  color: #8294a8;
}

.knowledge-publisher-note::before {
  content: "";
  width: 0.42rem;
  height: 0.42rem;
  border: 1px solid var(--cyan);
  transform: rotate(45deg);
}

.knowledge-library {
  padding: 1rem var(--gutter) 6.5rem;
}

.knowledge-library-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(18rem, 0.55fr);
  gap: 3rem;
  align-items: end;
  margin-bottom: 2rem;
  padding-top: 2.4rem;
  border-top: 1px solid var(--line);
}

.knowledge-library-heading h2 {
  max-width: 12ch;
  margin: 0;
  font-size: clamp(2.5rem, 4.6vw, 4.8rem);
  line-height: 1.06;
}

.knowledge-library-heading p {
  max-width: 34rem;
  margin: 0;
  color: var(--muted);
  line-height: 1.65;
}

.knowledge-tools {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(25rem, 0.95fr);
  gap: 1.5rem 2rem;
  align-items: end;
  margin-bottom: 1rem;
  padding: clamp(1.25rem, 2.4vw, 2rem);
  border: 1px solid var(--line);
  border-radius: 1.15rem;
  background:
    linear-gradient(145deg, rgba(132, 175, 255, 0.055), transparent 42%),
    rgba(5, 15, 27, 0.76);
  box-shadow: 0 1.2rem 4rem rgba(0, 0, 0, 0.14);
}

.knowledge-search label,
.knowledge-filter-group legend,
.knowledge-level-field > span {
  display: block;
  position: static;
  margin: 0 0 0.7rem;
  transform: none;
  color: #9eb0c4;
  font-size: 0.78rem;
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.knowledge-search-control {
  position: relative;
}

.knowledge-search input {
  min-height: 3.65rem;
  padding: 0.85rem 3.6rem 0.85rem 1.05rem;
  border-radius: 0.8rem;
  background: rgba(3, 11, 20, 0.82);
}

.knowledge-search-clear {
  position: absolute;
  top: 50%;
  right: 0.7rem;
  width: 2.35rem;
  height: 2.35rem;
  padding: 0;
  transform: translateY(-50%);
  border: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.055);
  color: #c9d6e5;
  font: inherit;
  font-size: 1.35rem;
  line-height: 1;
  cursor: pointer;
}

.knowledge-search-clear:hover,
.knowledge-search-clear:focus-visible {
  background: rgba(112, 240, 223, 0.12);
  color: var(--cyan);
}

.knowledge-filter-stack {
  display: grid;
  gap: 1rem;
}

.knowledge-filter-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(9rem, 0.28fr);
  gap: 1rem;
  align-items: end;
}

.knowledge-filter-group {
  min-width: 0;
  padding: 0;
  margin: 0;
  border: 0;
}

.knowledge-categories {
  justify-content: flex-start;
}

.knowledge-filter {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  min-height: 2.75rem;
  padding: 0.55rem 0.8rem;
}

.knowledge-filter[hidden] {
  display: none !important;
}

.knowledge-topic-group {
  padding-top: 1rem;
  border-top: 1px solid rgba(139, 173, 211, 0.14);
}

.knowledge-filter-count {
  display: inline-grid;
  min-width: 1.45rem;
  min-height: 1.45rem;
  place-items: center;
  padding: 0 0.32rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.07);
  color: #93a5b8;
  font-size: 0.7rem;
}

.knowledge-filter[aria-pressed="true"] .knowledge-filter-count {
  background: rgba(112, 240, 223, 0.16);
  color: var(--cyan);
}

.knowledge-level-field {
  display: block;
}

.knowledge-level-field select {
  width: 100%;
  min-height: 2.7rem;
  padding: 0.55rem 2.3rem 0.55rem 0.8rem;
  border: 1px solid var(--line);
  border-radius: 0.72rem;
  outline: 0;
  background: #091727;
  color: #d8e3ef;
  font: inherit;
  font-size: 0.82rem;
  cursor: pointer;
}

.knowledge-level-field select:focus-visible {
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(112, 240, 223, 0.1);
}

.knowledge-results-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 3.2rem;
  margin-bottom: 1rem;
}

.knowledge-results-status {
  margin: 0;
  color: #9aabbd;
  font-size: 0.9rem;
}

.knowledge-results-status strong {
  color: var(--text);
  font-size: 1.02rem;
}

.knowledge-reset {
  border: 0;
  border-bottom: 1px solid rgba(112, 240, 223, 0.32);
  background: transparent;
  color: #aabacd;
  font: inherit;
  font-size: 0.82rem;
  cursor: pointer;
}

.knowledge-reset:hover,
.knowledge-reset:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan);
}

.knowledge-reset:disabled {
  border-color: transparent;
  color: #647488;
  cursor: default;
}

.knowledge-card-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.knowledge-card {
  min-height: 0;
  padding: clamp(1.35rem, 2.5vw, 2rem);
  border-radius: 1rem;
  background:
    linear-gradient(145deg, rgba(140, 181, 255, 0.075), transparent 48%),
    var(--knowledge-panel);
  transform: none;
}

.knowledge-card::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(112, 240, 223, 0.62), transparent);
  opacity: 0;
  transition: opacity 180ms ease;
}

.knowledge-card:hover,
.knowledge-card:focus-within {
  transform: translateY(-3px);
  border-color: rgba(112, 240, 223, 0.38);
}

.knowledge-card:hover::before,
.knowledge-card:focus-within::before {
  opacity: 1;
}

.knowledge-card-meta {
  justify-content: flex-start;
  flex-wrap: wrap;
  margin-bottom: 2rem;
}

.knowledge-card-domain {
  color: var(--cyan);
  font-weight: 700;
}

.knowledge-card-meta span + span {
  padding-left: 0.7rem;
  border-left: 1px solid var(--line);
}

.knowledge-card h3 {
  max-width: 19ch;
  margin: 0 0 0.9rem;
  font-size: clamp(1.75rem, 2.55vw, 2.65rem);
  letter-spacing: -0.035em;
  line-height: 1.08;
  overflow-wrap: anywhere;
  hyphens: auto;
}

.knowledge-card p {
  max-width: 46rem;
  margin: 0;
  color: var(--muted);
  line-height: 1.65;
}

.knowledge-card-link {
  margin-top: 1.6rem;
  padding-top: 1.05rem;
}

.knowledge-card-link:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 0.35rem;
}

.knowledge-empty {
  margin: 0;
  padding: 2rem;
  text-align: center;
}

.knowledge-empty:not([hidden]) {
  display: block;
}

.knowledge-empty[hidden],
.knowledge-pagination[hidden],
.knowledge-card[hidden],
.knowledge-reading[hidden],
.knowledge-article[hidden],
.knowledge-search-clear[hidden] {
  display: none !important;
}

.knowledge-pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin-top: 2rem;
}

.knowledge-pagination button {
  min-height: 2.75rem;
  padding: 0.55rem 0.95rem;
  border: 1px solid var(--line);
  border-radius: 0.7rem;
  background: rgba(255, 255, 255, 0.035);
  color: #dbe5ef;
  font: inherit;
  cursor: pointer;
}

.knowledge-pagination button:hover,
.knowledge-pagination button:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan);
}

.knowledge-pagination button:disabled {
  opacity: 0.42;
  cursor: default;
}

.knowledge-page.knowledge-reader-active .knowledge-hero,
.knowledge-page.knowledge-reader-active .knowledge-library {
  display: none;
}

.knowledge-page.knowledge-reader-active .site-header {
  border-bottom-color: rgba(139, 173, 211, 0.16);
  background: rgba(3, 11, 20, 0.96);
  box-shadow: 0 0.8rem 2.5rem rgba(3, 11, 20, 0.16);
}

.knowledge-reading {
  min-height: 100vh;
  border-top: 0;
}

.knowledge-reading-inner {
  max-width: 82rem;
  padding: 8.5rem var(--gutter) 7rem;
}

.knowledge-reader-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  margin-bottom: 2.5rem;
  padding-bottom: 1.2rem;
  border-bottom: 1px solid rgba(8, 17, 30, 0.14);
}

.knowledge-reader-toolbar p {
  margin: 0;
  color: #53657b;
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.knowledge-back {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0;
  border: 0;
  background: transparent;
  color: #123c51;
  font: inherit;
  font-size: 0.9rem;
  font-weight: 650;
  cursor: pointer;
}

.knowledge-back span {
  color: #0c8f88;
  font-size: 1.15rem;
}

.knowledge-back:hover,
.knowledge-back:focus-visible {
  color: #0c8f88;
}

.knowledge-article {
  grid-template-columns: minmax(13rem, 0.34fr) minmax(0, 1fr);
  gap: clamp(2.5rem, 7vw, 7rem);
  padding: 0;
  border-top: 0;
}

.knowledge-article-meta {
  top: 8rem;
}

.knowledge-article-outline {
  margin-top: 2rem;
  padding-top: 1.4rem;
  border-top: 1px solid rgba(8, 17, 30, 0.14);
}

.knowledge-article-outline p {
  margin: 0 0 0.8rem;
  color: #263d51;
  font-family: inherit;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0;
}

.knowledge-article-outline a,
.knowledge-article-outline button {
  display: block;
  width: 100%;
  padding: 0.42rem 0;
  border: 0;
  background: transparent;
  color: #596a7d;
  font-family: inherit;
  font-size: 0.78rem;
  letter-spacing: 0;
  line-height: 1.35;
  text-align: left;
  cursor: pointer;
}

.knowledge-article-outline a:hover,
.knowledge-article-outline a:focus-visible,
.knowledge-article-outline button:hover,
.knowledge-article-outline button:focus-visible {
  color: #0c7771;
}

.knowledge-article-body h2 {
  margin: 0 0 1.5rem;
  color: #08111e;
  font-size: clamp(2.5rem, 5vw, 4.7rem);
  letter-spacing: -0.04em;
  line-height: 1.06;
}

.knowledge-article-body h2:focus-visible {
  outline: 2px solid #0c8f88;
  outline-offset: 0.35rem;
}

.knowledge-article-body h3 {
  margin: 2.5rem 0 0.65rem;
  color: #0a2634;
  font-size: 1.2rem;
  letter-spacing: -0.015em;
  line-height: 1.3;
  scroll-margin-top: 7rem;
}

.knowledge-audio-control {
  position: fixed;
  right: max(1rem, env(safe-area-inset-right));
  bottom: max(1rem, env(safe-area-inset-bottom));
  z-index: 85;
}

.knowledge-audio-control audio {
  display: none;
}

.knowledge-audio-toggle {
  display: grid;
  grid-template-columns: 2.35rem minmax(7.5rem, 1fr) auto;
  gap: 0.75rem;
  align-items: center;
  min-width: 20rem;
  min-height: 4rem;
  padding: 0.55rem 0.65rem 0.55rem 0.7rem;
  border: 1px solid rgba(139, 173, 211, 0.3);
  border-radius: 999px;
  background: rgba(5, 15, 27, 0.94);
  box-shadow: 0 1rem 2.8rem rgba(0, 0, 0, 0.28);
  color: #eef5fc;
  font: inherit;
  text-align: left;
  cursor: pointer;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: border-color 180ms ease, background-color 180ms ease, transform 180ms ease;
}

.knowledge-audio-toggle:hover {
  border-color: rgba(112, 240, 223, 0.62);
  background: rgba(7, 22, 37, 0.97);
  transform: translateY(-2px);
}

.knowledge-audio-toggle:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 0.22rem;
}

.knowledge-audio-control.is-playing .knowledge-audio-toggle {
  border-color: rgba(112, 240, 223, 0.52);
  background: rgba(7, 28, 42, 0.97);
}

.knowledge-audio-control.is-error .knowledge-audio-toggle {
  border-color: rgba(255, 132, 132, 0.5);
}

.knowledge-audio-bars {
  display: inline-flex;
  width: 2.35rem;
  height: 2.35rem;
  align-items: center;
  justify-content: center;
  gap: 0.16rem;
  border: 1px solid rgba(112, 240, 223, 0.3);
  border-radius: 50%;
  background: rgba(112, 240, 223, 0.07);
}

.knowledge-audio-bars i {
  width: 0.16rem;
  height: 0.75rem;
  border-radius: 999px;
  background: var(--cyan);
  transform-origin: center;
  animation: knowledge-audio-level 760ms ease-in-out infinite alternate;
  animation-play-state: paused;
}

.knowledge-audio-bars i:nth-child(2) {
  height: 1.05rem;
  animation-delay: -260ms;
}

.knowledge-audio-bars i:nth-child(3) {
  height: 0.58rem;
  animation-delay: -520ms;
}

.knowledge-audio-control.is-playing .knowledge-audio-bars i,
.knowledge-audio-control.is-loading .knowledge-audio-bars i {
  animation-play-state: running;
}

.knowledge-audio-control.is-loading .knowledge-audio-bars {
  opacity: 0.72;
}

.knowledge-audio-copy {
  display: grid;
  min-width: 0;
  gap: 0.05rem;
}

.knowledge-audio-artist {
  color: #8fa3b8;
  font-size: 0.64rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  line-height: 1.2;
  text-transform: uppercase;
}

.knowledge-audio-title {
  overflow: hidden;
  color: #f2f7fc;
  font-size: 0.88rem;
  font-weight: 650;
  line-height: 1.25;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.knowledge-audio-translation {
  overflow: hidden;
  color: #9cafc2;
  font-size: 0.69rem;
  font-weight: 560;
  line-height: 1.25;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.knowledge-audio-action {
  min-width: 4.4rem;
  padding: 0.55rem 0.7rem;
  border-radius: 999px;
  background: rgba(112, 240, 223, 0.1);
  color: var(--cyan);
  font-size: 0.73rem;
  font-weight: 750;
  text-align: center;
}

.knowledge-audio-control.is-error .knowledge-audio-action {
  background: rgba(255, 132, 132, 0.1);
  color: #ffb0b0;
}

html[dir="rtl"] .knowledge-audio-toggle {
  direction: rtl;
  text-align: right;
}

@keyframes knowledge-audio-level {
  from {
    transform: scaleY(0.42);
  }

  to {
    transform: scaleY(1);
  }
}

@media (max-width: 520px) {
  .knowledge-audio-control {
    right: max(0.75rem, env(safe-area-inset-right));
    bottom: max(0.75rem, env(safe-area-inset-bottom));
    left: max(0.75rem, env(safe-area-inset-left));
  }

  .knowledge-audio-toggle {
    width: 100%;
    min-width: 0;
  }

  .knowledge-page .site-footer {
    padding-bottom: calc(7rem + env(safe-area-inset-bottom));
  }
}

@media print {
  .knowledge-audio-control {
    display: none;
  }
}

@media (max-width: 1050px) {
  .knowledge-library-heading,
  .knowledge-tools {
    grid-template-columns: 1fr;
  }

  .knowledge-library-heading {
    gap: 1.2rem;
  }

  .knowledge-tools {
    align-items: stretch;
  }
}

@media (max-width: 820px) {
  .knowledge-filter-row {
    grid-template-columns: 1fr;
  }

  .knowledge-article {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .knowledge-article-meta {
    position: static;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
  }

  .knowledge-meta-item {
    min-width: 0;
  }

  .knowledge-meta-item span,
  .knowledge-meta-item strong {
    display: block;
  }

  .knowledge-meta-item strong {
    margin-top: 0.35rem;
    margin-bottom: 0;
  }

  .knowledge-article-outline {
    grid-column: 1 / -1;
  }
}

@media (max-width: 720px) {
  .knowledge-hero {
    padding-top: 7.8rem;
  }

  .knowledge-hero h1 {
    font-size: clamp(3.1rem, 13.5vw, 4.8rem);
  }

  .knowledge-library {
    padding-bottom: 5rem;
  }

  .knowledge-card-grid {
    grid-template-columns: 1fr;
  }

  .knowledge-card {
    min-height: 0;
  }

  .knowledge-reading-inner {
    padding-top: 7.5rem;
  }

  .knowledge-reader-toolbar {
    align-items: flex-start;
    flex-direction: column-reverse;
  }
}

@media (max-width: 360px) {
  .knowledge-card h3 {
    font-size: 1.6rem;
    letter-spacing: -0.02em;
    overflow-wrap: break-word;
  }
}

@media (max-width: 520px) {
  .knowledge-tools {
    padding: 1rem;
    border-radius: 0.9rem;
  }

  .knowledge-categories {
    flex-wrap: nowrap;
    margin-right: -1rem;
    padding-right: 1rem;
    overflow-x: auto;
    scrollbar-width: thin;
  }

  .knowledge-filter {
    flex: 0 0 auto;
  }

  .knowledge-results-bar {
    align-items: flex-start;
    flex-direction: column;
  }

  .knowledge-card-meta {
    gap: 0.55rem;
  }

  .knowledge-article-meta {
    grid-template-columns: 1fr;
  }

  .knowledge-article-body h2 {
    font-size: clamp(2.3rem, 12vw, 3.6rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .knowledge-card,
  .knowledge-card::before,
  .knowledge-audio-toggle {
    transition: none;
  }

  .knowledge-audio-bars i {
    animation: none;
    transform: none;
  }
}