.topology-history {
  margin: 1.2rem auto;
  padding: 1rem;
  border: 1px solid #c8d1cb;
  background: #f8faf8;
}

.topology-history-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid #d5ddd8;
}

.topology-history-heading h2 {
  margin: 0.16rem 0 0;
  color: #183128;
  font-size: clamp(1.3rem, 2vw, 1.75rem);
}

.topology-history-lede {
  max-width: 54rem;
  margin: 0.45rem 0 0;
  color: #647169;
  font-size: 0.78rem;
  line-height: 1.55;
}

.topology-history-filters {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.3rem;
}

.topology-history-filters button {
  min-height: 2rem;
  padding: 0.35rem 0.62rem;
  border: 1px solid #9cab a2;
  border-color: #9caba2;
  border-radius: 999px;
  background: #fff;
  color: #35463d;
  font: 700 0.65rem/1 Inter, ui-sans-serif, system-ui, sans-serif;
  cursor: pointer;
}

.topology-history-filters button[aria-pressed="true"] {
  border-color: #285847;
  background: #285847;
  color: #fff;
}

.topology-history-filters button:hover,
.topology-history-filters button:focus-visible {
  border-color: #285847;
  outline: 2px solid rgba(40, 88, 71, 0.17);
  outline-offset: 2px;
}

.topology-history-status {
  margin: 0.9rem 0;
  padding: 0.55rem 0.65rem;
  border-left: 3px solid #85958c;
  background: #eef2ef;
  color: #58665e;
  font-size: 0.72rem;
}

.topology-history-status[data-tone="ready"] {
  border-left-color: #3d755f;
  background: #e8f3ed;
  color: #285745;
}

.topology-history-status[data-tone="error"] {
  border-left-color: #a75149;
  background: #f8e8e6;
  color: #7b3934;
}

.topology-history-summary {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 1px;
  margin: 0 0 1rem;
  padding: 1px;
  background: #ccd5cf;
}

.topology-history-summary > div {
  min-width: 0;
  padding: 0.65rem;
  background: #fff;
}

.topology-history-summary dt {
  color: #6c786f;
  font-size: 0.62rem;
  font-weight: 720;
}

.topology-history-summary dd {
  margin: 0.28rem 0 0;
  color: #1d332a;
  font-size: 0.78rem;
  font-weight: 760;
  line-height: 1.35;
}

.topology-history-timeline {
  display: grid;
  gap: 0.9rem;
}

.topology-history-release {
  padding: 0.85rem;
  border: 1px solid #c9d2cc;
  border-left: 4px solid #4d806c;
  background: #fff;
}

.topology-history-release > header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 0.65rem;
}

.topology-history-release h3 {
  margin: 0.12rem 0 0;
  color: #1d342b;
  font-size: 1rem;
}

.topology-history-coordinate {
  margin: 0.28rem 0 0;
  color: #758179;
  font: 500 0.63rem/1.4 ui-monospace, SFMono-Regular, Menlo, monospace;
}

.topology-history-digest {
  flex: 0 0 auto;
  padding: 0.3rem 0.42rem;
  border: 1px solid #d5ddd8;
  background: #f5f7f5;
  color: #5f6c64;
  font-size: 0.6rem;
}

.topology-history-group {
  margin-top: 0.45rem;
  border: 1px solid #d8dfdb;
}

.topology-history-group > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 2.4rem;
  padding: 0.45rem 0.6rem;
  background: #f3f6f4;
  color: #31443b;
  font-size: 0.7rem;
  cursor: pointer;
}

.topology-history-group > summary span {
  min-width: 1.55rem;
  padding: 0.16rem 0.35rem;
  border-radius: 999px;
  background: #dfe8e3;
  color: #385448;
  font-variant-numeric: tabular-nums;
  text-align: center;
}

.topology-history-list {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 1px;
  background: #e1e7e3;
  list-style: none;
}

.topology-history-row {
  display: grid;
  grid-template-columns: minmax(12rem, 1.25fr) minmax(11rem, 1fr);
  align-items: center;
  gap: 0.55rem 0.8rem;
  min-width: 0;
  padding: 0.52rem 0.6rem;
  background: #fff;
  color: #45534b;
  font-size: 0.66rem;
}

.topology-history-identity,
.topology-history-movement {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  min-width: 0;
}

.topology-history-identity code,
.topology-history-movement code,
.topology-history-node {
  min-width: 0;
  overflow: hidden;
  color: #2f4a3e;
  font: 600 0.61rem/1.35 ui-monospace, SFMono-Regular, Menlo, monospace;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.topology-history-node[href] {
  color: #245c82;
  text-decoration: underline;
  text-decoration-color: rgba(36, 92, 130, 0.32);
  text-underline-offset: 2px;
}

.topology-history-relation {
  flex: 0 0 auto;
  padding: 0.17rem 0.38rem;
  border: 1px solid #aebbb3;
  border-radius: 999px;
  background: #edf2ef;
  color: #526159;
  font-size: 0.56rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.relation-added,
.relation-entered-frontier,
.relation-new,
.relation-continuation {
  border-color: #83b49e;
  background: #e5f3ec;
  color: #2d644e;
}

.relation-retired,
.relation-removed,
.relation-left-frontier {
  border-color: #d0a099;
  background: #f9e9e6;
  color: #88483f;
}

.relation-split,
.relation-merge,
.relation-reorganization {
  border-color: #b5a173;
  background: #f6efdc;
  color: #705d2d;
}

.topology-history-row-detail {
  grid-column: 1 / -1;
  margin: 0;
  color: #78837d;
  line-height: 1.45;
}

.topology-history-empty,
.topology-history-truncated {
  margin: 0.55rem;
  color: #79857e;
  font-size: 0.66rem;
}

@media (max-width: 78rem) {
  .topology-history-summary {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 54rem) {
  .topology-history-heading {
    align-items: flex-start;
    flex-direction: column;
  }

  .topology-history-filters {
    justify-content: flex-start;
  }

  .topology-history-row {
    grid-template-columns: 1fr;
  }

  .topology-history-row-detail {
    grid-column: 1;
  }
}

@media (max-width: 34rem) {
  .topology-history {
    padding: 0.65rem;
  }

  .topology-history-summary {
    grid-template-columns: 1fr;
  }

  .topology-history-release > header {
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  .topology-history * {
    scroll-behavior: auto !important;
  }
}