:root {
  --app-bg: white;
  --surface: white;
  --surface-soft: whitesmoke;
  --line: silver;
  --line-strong: gray;
  --ink: black;
  --muted: dimgray;
  --accent: blue;
  --accent-soft: aliceblue;
  --success-bg: honeydew;
  --success-line: green;
  --danger-bg: mistyrose;
  --danger-line: red;
  --shadow: none;
  --wiki-link: blue;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: sans-serif;
  color: var(--ink);
  background: var(--app-bg);
}

a {
  color: var(--wiki-link);
}

.page-shell {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 16px 24px;
}

.top-controls {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--app-bg);
  padding: 12px 0 10px;
}

.article-form {
  display: flex;
  gap: 8px;
  align-items: center;
  margin: 0;
}

.article-form input {
  width: min(28rem, 100%);
  min-height: 36px;
  padding: 6px 10px;
  font-size: 0.95rem;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: white;
}

.primary-button,
.secondary-button,
.article-chip {
  border: 1px solid var(--line);
  border-radius: 2px;
  min-height: 36px;
  padding: 0 12px;
  font-size: 0.9rem;
  cursor: pointer;
  transition: background 120ms ease, border-color 120ms ease;
}

.primary-button {
  background: whitesmoke;
  color: var(--ink);
}

.secondary-button {
  background: white;
  color: var(--ink);
}

.content-shell {
  display: block;
  margin-top: 0;
}

.article-stage,
.timeline-shell {
  min-width: 0;
}

.article-stage,
.timeline-shell {
  background: white;
  border: 1px solid var(--line);
  border-radius: 0;
  box-shadow: var(--shadow);
}

.article-stage {
  padding: 0;
}

.article-frame {
  min-height: 72vh;
  border: 0;
  background: white;
  overflow: hidden;
}

.article-canvas {
  padding: 1.5rem;
}

.empty-state,
.loading-state,
.error-state {
  padding: 1.5rem;
  color: var(--muted);
  line-height: 1.55;
}

.error-state {
  color: red;
}

.timeline-shell {
  position: sticky;
  bottom: 12px;
  margin-top: 12px;
  padding: 10px 12px;
}

.timeline-controls {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
}

#timeline-slider {
  width: 100%;
}

.timeline-strip {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  margin-top: 10px;
  padding: 6px 2px 2px;
  scrollbar-width: thin;
}

.timeline-tick {
  flex: 0 0 auto;
  width: 14px;
  min-height: 38px;
  border-radius: 0;
  border: 1px solid var(--line);
  background: whitesmoke;
  position: relative;
  cursor: pointer;
}

.timeline-tick::after {
  content: attr(data-label);
  position: absolute;
  left: 50%;
  bottom: calc(100% + 6px);
  transform: translateX(-50%);
  opacity: 0;
  pointer-events: none;
  white-space: nowrap;
  font-size: 0.72rem;
  padding: 4px 7px;
  border-radius: 2px;
  background: black;
  color: white;
  transition: opacity 140ms ease;
}

.timeline-tick:hover::after,
.timeline-tick:focus-visible::after {
  opacity: 1;
}

.timeline-tick.is-selected {
  background: blue;
  border-color: blue;
}

.timeline-tick.is-milestone {
  width: 18px;
}

.tick-markers {
  position: absolute;
  left: 1px;
  right: 1px;
  bottom: 1px;
  display: flex;
  justify-content: center;
  gap: 1px;
  pointer-events: none;
}

.tick-marker {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  opacity: 0.95;
}

.tick-marker.is-added {
  background: var(--success-line);
}

.tick-marker.is-removed {
  background: var(--danger-line);
}

.timeline-summary {
  min-height: 24px;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 8px;
  font-size: 0.8rem;
  color: var(--muted);
}

.length-chart {
  margin-top: 8px;
  border-top: 1px solid var(--line);
  padding-top: 8px;
}

.length-chart-empty {
  color: var(--muted);
  font-size: 0.8rem;
}

.length-chart svg {
  display: block;
  width: 100%;
  height: 92px;
}

.attribution-note {
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.45;
}

.length-chart-axis {
  fill: none;
  stroke: silver;
  stroke-width: 1;
}

.length-chart-line {
  fill: none;
  stroke: blue;
  stroke-width: 1.5;
}

.length-chart-point {
  fill: red;
}

.length-chart-text {
  fill: dimgray;
  font-size: 10px;
}

.timeline-stat {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 1px 6px;
  border: 1px solid var(--line);
  background: white;
  border-radius: 0;
}

.timeline-meta-text {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 1px 6px;
  border: 1px solid var(--line);
  background: white;
  border-radius: 0;
}

.timeline-stat-swatch {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.timeline-stat-swatch.is-added {
  background: var(--success-line);
}

.timeline-stat-swatch.is-removed {
  background: var(--danger-line);
}

.wiki-root {
  font-family: sans-serif;
  color: black;
  line-height: 1.6;
}

.wiki-root .mw-parser-output {
  font-size: 0.98rem;
}

.wiki-root .mw-parser-output > *:first-child {
  margin-top: 0;
}

.wiki-root .mw-parser-output > * {
  transition: background 160ms ease, border-color 160ms ease, box-shadow 160ms ease;
}

.wiki-root .is-active-diff-target {
  outline: 2px solid blue;
  outline-offset: 2px;
}

.wiki-root .diff-added {
  border-left: 4px solid transparent;
  padding-left: 12px;
  margin-left: -16px;
  border-radius: 0;
}

.wiki-root .diff-added {
  background: var(--success-bg);
  border-left-color: var(--success-line);
}

.wiki-root .diff-inline-added {
  background: var(--success-bg);
}

.wiki-root .diff-inline-removed {
  background: var(--danger-bg);
  text-decoration: line-through;
}

.diff-removed-block {
  margin: 0.5rem 0;
  padding: 0.5rem 0.75rem;
  border-radius: 0;
  background: var(--danger-bg);
  border-left: 4px solid var(--danger-line);
}

.diff-removed-block p {
  margin: 0;
  color: black;
  white-space: pre-wrap;
  text-decoration: line-through;
}

.wiki-root table {
  border-collapse: collapse;
  width: auto;
  max-width: 100%;
  margin: 1rem 0;
  background: white;
}

.wiki-root table.wikitable,
.wiki-root .infobox,
.wiki-root .sidebar {
  border: 1px solid silver;
}

.wiki-root .infobox,
.wiki-root .thumb,
.wiki-root .tright,
.wiki-root .floatright {
  float: right;
  clear: right;
  margin: 0 0 1rem 1rem;
  max-width: min(26rem, 100%);
}

.wiki-root .tleft,
.wiki-root .floatleft {
  float: left;
  clear: left;
  margin: 0 1rem 1rem 0;
  max-width: min(26rem, 100%);
}

.wiki-root .thumbinner,
.wiki-root .infobox,
.wiki-root .sidebar {
  background: whitesmoke;
}

.wiki-root .infobox caption,
.wiki-root .infobox th,
.wiki-root .wikitable th {
  background: whitesmoke;
}

.wiki-root th,
.wiki-root td {
  border: 1px solid silver;
  padding: 0.35rem 0.55rem;
  vertical-align: top;
}

.wiki-root img,
.wiki-root video,
.wiki-root audio {
  max-width: 100%;
  height: auto;
}

.wiki-root .toc {
  display: table;
  padding: 0.6rem 1rem;
  border: 1px solid silver;
  background: whitesmoke;
  margin: 1rem 0;
}

.wiki-root blockquote {
  margin: 1rem 0;
  padding-left: 1rem;
  border-left: 3px solid silver;
  color: dimgray;
}

.wiki-root pre,
.wiki-root code,
.wiki-root .mw-highlight {
  max-width: 100%;
  overflow-x: auto;
}

.wiki-root .reference {
  font-size: 0.8em;
}

.wiki-root::after {
  content: "";
  display: block;
  clear: both;
}

@media (max-width: 760px) {
  .page-shell {
    padding: 0 8px 16px;
  }

  .article-form {
    flex-wrap: wrap;
  }

  .timeline-controls {
    grid-template-columns: 1fr;
  }

  .timeline-summary {
    min-height: 0;
  }

  .length-chart svg {
    height: 80px;
  }

  .wiki-root .infobox,
  .wiki-root .thumb,
  .wiki-root .tright,
  .wiki-root .floatright,
  .wiki-root .tleft,
  .wiki-root .floatleft {
    float: none;
    margin: 1rem 0;
    max-width: 100%;
  }
}