.nu-story-tree-root {
  position: fixed;
  top: 92px;
  right: 18px;
  z-index: 45;
  width: min(360px, calc(100vw - 28px));
  pointer-events: none;
}

.nu-story-tree-root.is-left {
  left: 18px;
  right: auto;
}

.nu-story-tree-root.is-right {
  right: 18px;
  left: auto;
}

.nu-story-tree-root.is-embedded {
  position: relative;
  inset: auto;
  width: 100%;
  max-width: none;
  margin: 0.6rem 0 0;
  pointer-events: auto;
}

.nu-story-tree-root.is-embedded .nu-tree-card {
  grid-template-columns: 54px minmax(0, 1fr);
  gap: 0.5rem;
}

.nu-story-tree-root.is-embedded .nu-tree-card.no-thumb {
  grid-template-columns: minmax(0, 1fr);
}

.nu-story-tree-root.is-embedded .nu-tree-thumb {
  width: 54px;
  height: 54px;
  aspect-ratio: auto;
}

.nu-story-tree-root.is-embedded .nu-tree-card-body {
  min-width: 0;
}

.nu-story-tree-root.is-embedded .nu-tree-title {
  font-size: 0.96rem;
  line-height: 1.3;
}

.nu-tree-panel {
  pointer-events: auto;
  background: rgba(9, 12, 19, 0.92);
  border: 1px solid rgba(92, 255, 191, 0.32);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.42);
  backdrop-filter: blur(4px);
}

.nu-tree-panel.is-left {
  margin-right: auto;
}

.nu-tree-panel.is-right {
  margin-left: auto;
}

.nu-tree-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.7rem 0.75rem;
  border-bottom: 1px solid rgba(92, 255, 191, 0.24);
  background: linear-gradient(120deg, rgba(15, 31, 25, 0.94), rgba(10, 17, 22, 0.9));
}

.nu-tree-heading {
  font-family: 'Space Mono', monospace;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.98rem;
  color: #dffff2;
}

.nu-tree-toggle {
  appearance: none;
  border: 1px solid rgba(92, 255, 191, 0.4);
  background: rgba(12, 20, 27, 0.95);
  color: #eafff7;
  width: 34px;
  height: 30px;
  line-height: 1;
  cursor: pointer;
  font-weight: 700;
}

.nu-tree-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.22s ease;
}

.nu-tree-panel.is-open .nu-tree-body {
  max-height: min(72vh, 760px);
  overflow: auto;
}

.nu-tree-list,
.nu-tree-children {
  list-style: none;
  margin: 0;
  padding: 0;
}

.nu-tree-list {
  padding: 0.75rem 0.7rem 0.95rem;
}

.nu-tree-node {
  position: relative;
  margin: 0;
  padding: 0;
}

.nu-tree-children {
  margin-left: 0.9rem;
  padding-left: 0.8rem;
  border-left: 1px solid rgba(130, 255, 204, 0.28);
}

.nu-tree-card {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: 0.68rem;
  align-items: start;
  text-decoration: none;
  color: #f4f8ff;
  margin: 0.42rem 0;
  padding: 0.52rem;
  background: rgba(14, 20, 30, 0.86);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.nu-tree-card.no-thumb {
  grid-template-columns: 1fr;
}

.nu-tree-thumb {
  display: block;
  width: 72px;
  height: 72px;
  overflow: hidden;
}

.nu-tree-thumb img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.nu-tree-card-body {
  display: flex;
  flex-direction: column;
  gap: 0.22rem;
  min-width: 0;
}

.nu-tree-title {
  font-size: 1.04rem;
  font-weight: 700;
  line-height: 1.32;
  display: block;
  white-space: normal;
  overflow: visible;
  word-break: normal;
  overflow-wrap: break-word;
}

.nu-tree-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.36rem;
}

.nu-tree-type {
  font-size: 0.74rem;
  font-family: 'Space Mono', monospace;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--nu-tree-badge-color, #cffff0);
  border: 1px solid color-mix(in srgb, var(--nu-tree-badge-color, #8BFFDA) 55%, transparent);
  padding: 0.16rem 0.28rem;
  background: color-mix(in srgb, var(--nu-tree-badge-color, #8BFFDA) 18%, rgba(10, 18, 24, 0.92));
}

.nu-tree-external-cta {
  display: inline-flex;
  align-self: flex-start;
  margin-top: 0.25rem;
  padding: 0.22rem 0.4rem;
  border: 1px solid rgba(126, 255, 208, 0.45);
  background: rgba(11, 40, 30, 0.7);
  color: #eafff5;
  font-size: 0.72rem;
  font-family: 'Space Mono', monospace;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.nu-tree-date {
  font-size: 0.86rem;
  color: #c8d7f0;
  font-family: 'Space Mono', monospace;
}

.nu-tree-node.is-current > .nu-tree-card {
  border-color: rgba(126, 255, 208, 0.92);
  box-shadow: inset 0 0 0 1px rgba(126, 255, 208, 0.45), 0 0 0 1px rgba(126, 255, 208, 0.18);
  background: rgba(20, 38, 34, 0.9);
}

.nu-tree-node.is-path > .nu-tree-card {
  border-color: rgba(126, 255, 208, 0.45);
}

.nu-tree-error,
.nu-tree-empty {
  margin: 0;
  padding: 0.8rem;
  font-size: 0.92rem;
  color: #f2f6ff;
}

@media (max-width: 1060px) {
  .nu-story-tree-root {
    width: min(320px, calc(100vw - 16px));
    right: 8px;
    top: 72px;
  }
}

@media (max-width: 860px) {
  .nu-story-tree-root {
    position: fixed;
    inset: auto 8px 8px 8px;
    width: auto;
    top: auto;
  }

  .nu-tree-panel.is-open .nu-tree-body {
    max-height: 48vh;
  }
}