.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.page--video-manual {
  padding-top: 32px;
  padding-bottom: 48px;
}

.page--video-manual .page__header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px 24px;
  flex-wrap: wrap;
}

.page--video-manual .page__subtitle {
  margin: 0;
  flex: 1 1 220px;
  min-width: 0;
  font-size: 15px;
  line-height: 1.5;
  color: var(--color-text-muted);
}

.video-manual-page__count {
  margin: 0;
  font-size: 13px;
  color: var(--color-text-muted);
}

.video-manual {
  margin-top: 28px;
}

.video-manual-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 48px 16px;
  color: var(--color-text-muted);
}

.video-manual-loading__spinner {
  width: 28px;
  height: 28px;
  border: 2px solid color-mix(in srgb, var(--color-border) 70%, transparent);
  border-top-color: var(--color-accent);
  border-radius: 50%;
  animation: video-manual-spin 0.7s linear infinite;
}

@keyframes video-manual-spin {
  to {
    transform: rotate(360deg);
  }
}

.video-manual-shell {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.video-manual-toolbar {
  display: flex;
  gap: 12px;
  align-items: center;
}

.video-manual-search {
  flex: 1;
  min-width: 0;
}

.video-manual-search__input {
  width: 100%;
  min-height: 46px;
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md, 8px);
  background: var(--color-surface);
  color: var(--color-text);
  font: inherit;
  font-size: 15px;
}

.video-manual-search__input:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.video-manual-layout {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.video-manual-outline {
  min-width: 0;
}

.video-manual-tree__banner {
  margin: 0 0 10px;
  padding: 2px 8px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

.video-manual-tree,
.video-manual-tree__children {
  list-style: none;
  margin: 0;
  padding: 0;
}

.video-manual-tree {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.video-manual-tree__children {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.video-manual-tree__branch {
  border-radius: var(--radius-md);
}

.video-manual-tree__row {
  display: flex;
  align-items: flex-start;
  gap: 6px;
  width: 100%;
  padding: 6px 8px 6px calc(6px + var(--depth, 0) * 14px);
  list-style: none;
  cursor: pointer;
  user-select: none;
}

.video-manual-tree__row::-webkit-details-marker {
  display: none;
}

.video-manual-tree__caret,
.video-manual-tree__spacer {
  flex: 0 0 12px;
  width: 12px;
  height: 16px;
  margin-top: 2px;
}

.video-manual-tree__caret::before {
  content: "";
  display: block;
  width: 0;
  height: 0;
  margin: 4px 0 0 3px;
  border-style: solid;
  border-width: 4px 0 4px 6px;
  border-color: transparent transparent transparent currentColor;
  opacity: 0.55;
}

.video-manual-tree__branch[open] > .video-manual-tree__row > .video-manual-tree__caret::before {
  margin: 5px 0 0 1px;
  border-width: 6px 4px 0 4px;
  border-color: currentColor transparent transparent transparent;
}

.video-manual-tree__label {
  flex: 1 1 auto;
  min-width: 0;
  padding: 0;
  border: 0;
  background: none;
  color: var(--color-text-muted);
  font: inherit;
  font-size: 14px;
  font-weight: 500;
  line-height: 1.35;
  text-align: left;
  cursor: pointer;
}

.video-manual-tree__branch > .video-manual-tree__row > .video-manual-tree__label {
  font-weight: 600;
  color: color-mix(in srgb, var(--color-text-muted) 20%, var(--color-text));
}

.video-manual-tree__label:hover {
  color: var(--color-accent);
}

.video-manual-tree__label.is-current {
  color: var(--color-text);
  font-weight: 600;
}

.video-manual-tree__row:has(.video-manual-tree__label.is-current) {
  border-radius: var(--radius-md);
  background: color-mix(
    in srgb,
    var(--color-accent) 10%,
    color-mix(in srgb, var(--color-text) 7%, var(--color-bg))
  );
  box-shadow: inset 3px 0 0 var(--color-accent);
}

.video-manual-content {
  display: flex;
  flex-direction: column;
  gap: 22px;
  min-width: 0;
}

.video-manual-crumb {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 8px;
  margin: 0;
  font-size: 13px;
  color: var(--color-text-muted);
}

.video-manual-crumb button {
  border: none;
  background: none;
  padding: 0;
  font: inherit;
  color: inherit;
  cursor: pointer;
}

.video-manual-crumb button:hover {
  color: var(--color-accent);
}

.video-manual-title {
  margin: 0;
  font-size: clamp(22px, 4vw, 32px);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.15;
}

.video-manual-lede {
  margin: 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.6;
  color: color-mix(in srgb, var(--color-text-muted) 72%, var(--color-text));
}

.video-manual-hero {
  overflow: hidden;
  border-radius: var(--radius-lg);
  background: #111;
  box-shadow: 0 8px 28px color-mix(in srgb, var(--color-text) 12%, transparent);
}

.video-manual-hero__media {
  position: relative;
  aspect-ratio: 16 / 9;
  background: #0b0b0b;
}

.video-manual-hero__media.is-playing iframe {
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
}

.video-manual-poster {
  position: relative;
  display: block;
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
  border: 0;
  cursor: pointer;
  background: #111;
}

.video-manual-poster img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.video-manual-poster__play {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 68px;
  height: 68px;
  border-radius: 50%;
  background: #fff;
  transform: translate(-50%, -50%);
  box-shadow: 0 6px 28px rgba(0, 0, 0, 0.45);
}

.video-manual-poster__play::after {
  content: "";
  position: absolute;
  left: 54%;
  top: 50%;
  transform: translate(-50%, -50%);
  border-style: solid;
  border-width: 12px 0 12px 18px;
  border-color: transparent transparent transparent #111;
}

.video-manual-poster:hover .video-manual-poster__play {
  transform: translate(-50%, -50%) scale(1.06);
}

.video-manual-hero__meta {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 18px 18px;
  background: var(--color-surface);
}

.video-manual-kicker {
  margin: 0;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.video-manual-hero__title {
  margin: 0;
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--color-text);
  text-decoration: none;
}

.video-manual-hero__title:hover {
  color: var(--color-accent);
}

.video-manual-hero__by {
  margin: 0;
  font-size: 13px;
  color: var(--color-text-muted);
}

.video-manual-section-title {
  margin: 8px 0 0;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--color-text);
}

.video-manual-contents {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.video-manual-page-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  color: inherit;
  text-align: left;
  cursor: pointer;
  font: inherit;
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.video-manual-page-link:hover {
  border-color: var(--color-accent);
  transform: translateY(-1px);
}

.video-manual-page-link__text {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.video-manual-page-link__title {
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.video-manual-page-link__meta {
  font-size: 13px;
  color: var(--color-text-muted);
  line-height: 1.4;
}

.video-manual-page-link__go {
  flex: 0 0 8px;
  width: 8px;
  height: 8px;
  border-right: 2px solid currentColor;
  border-top: 2px solid currentColor;
  transform: rotate(45deg);
  opacity: 0.35;
}

.video-manual-page-link:hover .video-manual-page-link__go {
  opacity: 0.8;
}

.video-manual-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.video-manual-card--text {
  flex-direction: row;
  align-items: center;
}

.video-manual-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}

.video-manual-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
  box-shadow: 0 10px 24px color-mix(in srgb, var(--color-text) 12%, transparent);
}

.video-manual-card__thumb {
  position: relative;
  aspect-ratio: 16 / 9;
  background: #111;
}

.video-manual-card__thumb img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.video-manual-card__body {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 12px 14px 14px;
}

.video-manual-card__title {
  margin: 0;
  font-size: 14px;
  font-weight: 600;
  line-height: 1.35;
}

.video-manual-card__meta {
  margin: 0;
  font-size: 12px;
  color: var(--color-text-muted);
}

.video-manual-badge {
  display: inline-flex;
  align-self: flex-start;
  padding: 2px 7px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--color-accent) 16%, var(--color-surface));
  color: var(--color-text);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.video-manual-nav {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

.video-manual-nav__btn {
  min-height: 42px;
  padding: 10px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-btn);
  background: none;
  color: var(--color-text);
  font: inherit;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
}

.video-manual-nav__btn:hover:not(:disabled) {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.video-manual-nav__btn:disabled {
  opacity: 0.35;
  cursor: default;
}

.video-manual-nav__btn--next {
  background: color-mix(in srgb, var(--color-text) 7%, var(--color-bg));
}

.video-manual-empty {
  padding: 18px;
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-lg);
  color: var(--color-text-muted);
  font-size: 14px;
}

@media (min-width: 860px) {
  .video-manual-layout {
    display: grid;
    grid-template-columns: 300px minmax(0, 1fr);
    gap: 36px;
    align-items: start;
  }

  .video-manual-outline {
    position: sticky;
    top: 32px;
    max-height: calc(100dvh - 64px);
    overflow: auto;
    padding-right: 6px;
  }
}

@media (max-width: 859px) {
  .video-manual-grid {
    grid-template-columns: 1fr;
  }

  .video-manual-outline {
    padding-bottom: 16px;
    border-bottom: 1px solid color-mix(in srgb, var(--color-border) 55%, transparent);
  }
}

@media (max-width: 640px) {
  .page--video-manual {
    padding: 24px 16px 40px;
  }
}