/* One shared chronology, two reading scales: map exploration and event storytelling. */
body {
  --atlas-timeline-space: var(--atlas-explore-space);
}
body[data-timeline-mode='story'] {
  --atlas-timeline-space: var(--atlas-story-space);
}
body[data-module='browse'] {
  --atlas-timeline-space: 36px;
}
.timeline {
  --current-period-color: var(--atlas-brass);
  position: absolute;
  z-index: var(--atlas-z-controls);
  bottom: 32px;
  left: var(--atlas-edge);
  right: var(--atlas-edge);
  padding: 0 18px 10px;
  isolation: isolate;
}
.timeline::before {
  content: '';
  position: absolute;
  z-index: -1;
  inset: -145px calc(-1 * var(--atlas-edge)) -32px;
  background: linear-gradient(
    to bottom,
    color-mix(in srgb, var(--atlas-panel-solid) 0%, transparent) 0,
    color-mix(in srgb, var(--atlas-panel-solid) 3%, transparent) 25px,
    color-mix(in srgb, var(--atlas-panel-solid) 12%, transparent) 55px,
    color-mix(in srgb, var(--atlas-panel-solid) 30%, transparent) 85px,
    color-mix(in srgb, var(--atlas-panel-solid) 57%, transparent) 112px,
    color-mix(in srgb, var(--atlas-panel-solid) 82%, transparent) 140px,
    color-mix(in srgb, var(--atlas-panel-solid) 96%, transparent) 175px,
    var(--atlas-panel-solid) 210px
  );
  pointer-events: none;
}
.timeline-toolbar {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 20px;
}
.playback-controls {
  grid-column: 2;
  display: flex;
  align-items: center;
  gap: 8px;
}
.year-step {
  display: flex;
  align-items: center;
  gap: 2px;
}
.playback-controls .icon-button {
  position: relative;
}
.playback-controls [data-tooltip]::after {
  right: auto;
  bottom: calc(100% + 8px);
  left: 50%;
  z-index: var(--atlas-z-popover);
  transform: translateX(-50%) translateY(4px);
}
.playback-controls [data-tooltip]:is(:hover, :focus-visible)::after {
  transform: translateX(-50%);
}
body[data-timeline-mode='story'] #previous-year,
body[data-timeline-mode='story'] #next-year {
  display: none;
}
#selected-event-year {
  height: 38px;
  padding: 0 2px;
  background: transparent;
  color: var(--current-period-color);
  font: 500 20px/1 var(--atlas-number-font);
  font-variant-numeric: tabular-nums;
  letter-spacing: 1px;
  white-space: nowrap;
}
#selected-event-year:hover {
  color: var(--atlas-paper);
}
.timeline-tools {
  grid-column: 3;
  justify-self: end;
  display: flex;
  align-items: center;
  gap: 18px;
}
.ruler-tools {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 11px;
}
#timeline-zoom-reset {
  padding: 4px 0;
  background: transparent;
  color: var(--atlas-paper);
  border-radius: 0;
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-color: var(--atlas-line);
}
body[data-timeline-mode='story'] .ruler-tools {
  display: none;
}
.timeline-mode {
  display: flex;
  align-items: center;
  gap: 4px;
}
.timeline-mode button {
  position: relative;
  padding: 5px 13px;
  height: 36px;
  background: transparent;
  color: var(--atlas-muted);
  font-size: 12px;
}
.timeline-mode button[aria-pressed='true'] {
  color: var(--atlas-paper);
}
.timeline-mode button[aria-pressed='true']::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 13px;
  right: 13px;
  height: 2px;
  background: var(--current-period-color);
}
.year-ruler {
  --ruler-height: 32px;
  --ruler-thumb-size: 12px;
  position: relative;
  margin: 8px 6px 0;
}
#explore-ruler[data-zoomed='true'] {
  cursor: grab;
  touch-action: none;
}
#explore-ruler[data-zoomed='true']:active {
  cursor: grabbing;
}
#explore-ruler[data-zoomed='true'] #year-slider {
  pointer-events: none;
}
#explore-ruler[data-zoomed='true']::before {
  content: '';
  position: absolute;
  z-index: 2;
  inset: 0 0 44px;
}
#dynasty-bands {
  position: relative;
  height: 32px;
  margin: 12px 6px 0;
}
#dynasty-bands > button {
  position: absolute;
  height: 32px;
  min-width: 0;
  padding: 0;
  border-radius: 0;
  transform: none;
  container: dynasty / inline-size;
  border-right: 1px solid var(--atlas-panel-solid);
  background: color-mix(in srgb, var(--period-color) 34%, transparent);
}
#explore-ruler[data-zooming='true'] #dynasty-bands {
  pointer-events: none;
}
#dynasty-bands > button::before {
  content: '';
  position: absolute;
  inset: 0 0 auto;
  height: 5px;
  background: var(--period-color);
}
#dynasty-bands b {
  display: block;
  padding-top: 10px;
  text-align: center;
  white-space: nowrap;
  font-size: 11px;
  font-weight: 400;
  color: var(--atlas-muted);
}
#dynasty-bands > .current {
  background: color-mix(in srgb, var(--period-color) 58%, transparent);
  box-shadow: inset 0 -2px var(--period-color);
}
#dynasty-bands > .current::before {
  opacity: 1;
  height: 4px;
}
#dynasty-bands > .current b {
  color: var(--atlas-paper);
  font-weight: 500;
}
#dynasty-bands > button:hover,
#dynasty-bands > .inspecting {
  background: color-mix(in srgb, var(--period-color) 72%, transparent);
}
#dynasty-bands > button:focus-visible {
  outline: 2px solid var(--period-color);
  outline-offset: 2px;
  z-index: 1;
}
#dynasty-tooltip {
  position: absolute;
  z-index: var(--atlas-z-popover);
  bottom: 44px;
  width: min(340px, 100%);
  padding: 22px 24px;
  border: 1px solid var(--atlas-faint-line);
  border-top: 3px solid var(--period-color);
  border-radius: var(--atlas-radius-panel);
  background: var(--atlas-panel-solid);
  color: var(--atlas-paper);
  box-shadow: var(--atlas-shadow);
  text-align: left;
}
#dynasty-tooltip::after {
  content: '';
  position: absolute;
  left: var(--tip-anchor);
  bottom: -12px;
  height: 11px;
  border-left: 1px solid var(--period-color);
  pointer-events: none;
}
.dynasty-tooltip-heading {
  display: grid;
  gap: 7px;
}
.dynasty-tooltip-name {
  font: 22px/1.3 var(--atlas-title-font);
  letter-spacing: 2px;
}
.dynasty-tooltip-dates {
  color: var(--atlas-muted);
  font: 13px/1.5 var(--atlas-number-font);
  font-variant-numeric: tabular-nums;
}
.dynasty-tooltip-summary {
  margin: 14px 0 0;
  font-size: 13px;
  line-height: 1.85;
}
.dynasty-tooltip-note {
  margin: 12px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--atlas-line);
  color: var(--atlas-muted);
  font-size: 11px;
  line-height: 1.8;
}
.dynasty-reading {
  margin-top: 16px;
  padding: 0;
  background: transparent;
  color: var(--atlas-paper);
  font-size: 13px;
  text-decoration: underline;
  text-underline-offset: 4px;
}
/* Short dynasties retain real duration; the current name is always readable above. */
@container dynasty (max-width: 30px) {
  #dynasty-bands b {
    visibility: hidden;
  }
}
@container dynasty (max-width: 58px) {
  #dynasty-bands b[data-long='true'] {
    visibility: hidden;
  }
}
#year-slider {
  position: relative;
  display: block;
  appearance: none;
  width: 100%;
  height: var(--ruler-height);
  margin: 0;
  background: transparent;
  cursor: ew-resize;
}
#year-slider::-webkit-slider-runnable-track {
  height: 1px;
  background: transparent;
}
#year-slider::-moz-range-track {
  height: 1px;
  background: transparent;
}
#year-slider::-moz-range-progress {
  background: transparent;
}
#year-slider::-webkit-slider-thumb {
  appearance: none;
  width: var(--ruler-thumb-size);
  height: 26px;
  margin-top: -15px;
  border: 4px solid var(--atlas-panel-solid);
  border-block-width: 0;
  border-radius: 0;
  background: var(--current-period-color);
}
#year-slider::-moz-range-thumb {
  box-sizing: border-box;
  width: var(--ruler-thumb-size);
  height: 26px;
  border: 4px solid var(--atlas-panel-solid);
  border-block-width: 0;
  border-radius: 0;
  background: var(--current-period-color);
}
#explore-ruler[data-selection-visible='false'] #year-slider::-webkit-slider-thumb {
  opacity: 0;
}
#explore-ruler[data-selection-visible='false'] #year-slider::-moz-range-thumb {
  opacity: 0;
}
#ruler-ticks {
  position: absolute;
  left: 6px;
  right: 6px;
  top: 15px;
  height: 7px;
  border-top: 1px solid var(--atlas-line);
  pointer-events: none;
}
#ruler-ticks i {
  position: absolute;
  top: 0;
  width: 1px;
  height: 6px;
  background: var(--atlas-line);
}
#ruler-ticks span {
  position: absolute;
  padding-top: 17px;
  transform: translateX(-50%);
  color: var(--atlas-muted);
  font: 11px/1.5 var(--atlas-number-font);
  font-variant-numeric: tabular-nums;
}
#ruler-ticks span::before {
  content: '';
  position: absolute;
  height: 12px;
  width: 1px;
  background: var(--atlas-line);
  top: 0;
  left: 50%;
}
.range-labels {
  display: flex;
  justify-content: space-between;
  color: var(--atlas-muted);
  font: 11px/1.5 var(--atlas-number-font);
  font-variant-numeric: tabular-nums;
}
.timeline-settings {
  position: absolute;
  bottom: calc(100% + 12px);
  left: 0;
  width: min(620px, 100%);
  padding: 17px 22px;
  background: var(--atlas-panel-solid);
  border: 1px solid var(--atlas-faint-line);
  border-radius: var(--atlas-radius-panel);
  box-shadow: var(--atlas-shadow);
}
.timeline-settings-heading {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 14px;
  font: 18px var(--atlas-title-font);
}
.year-controls,
#year-form,
.period-label {
  display: flex;
  align-items: center;
  gap: 8px;
}
.year-controls {
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 16px;
}
#year-input,
#year-era,
#period-select {
  border: 1px solid var(--atlas-line);
  background: var(--atlas-field);
  border-radius: var(--atlas-radius-control);
  height: 36px;
  padding: 4px 8px;
  font-size: 12px;
}
#year-input {
  width: 82px;
  appearance: textfield;
  font: 17px/1 var(--atlas-number-font);
  text-align: center;
}
#year-input::-webkit-inner-spin-button,
#year-input::-webkit-outer-spin-button {
  appearance: none;
  margin: 0;
}
#year-form button,
#all-dynasties {
  background: var(--atlas-field);
  border-radius: var(--atlas-radius-control);
  padding: 5px 12px;
  min-height: 36px;
  font-size: 12px;
}
.period-label {
  color: var(--atlas-muted);
  font-size: 11px;
}
#period-select {
  max-width: 130px;
  color: var(--atlas-paper);
}
#dynasty-nav {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 4px;
}
#dynasty-nav button {
  background: transparent;
  padding: 7px 4px;
  min-height: 36px;
  font-size: 12px;
  color: var(--atlas-muted);
}
#dynasty-nav button::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 12px;
  margin-right: 7px;
  vertical-align: -1px;
  background: var(--period-color);
}
#dynasty-nav button[aria-current='date'] {
  color: var(--period-color);
}
#dynasty-nav button[aria-pressed='true'] {
  box-shadow: inset 0 -2px var(--period-color);
  background: var(--atlas-field);
}
.timeline-settings-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--atlas-faint-line);
}
#timeline-count {
  color: var(--atlas-muted);
  font-size: 11px;
}
.story-track-heading {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin: 16px 8px 6px;
  color: var(--atlas-muted);
  font-size: 11px;
}
#story-year {
  background: transparent;
  color: var(--current-period-color);
  padding: 4px 0;
  font: 12px var(--atlas-number-font);
}
.story-viewport {
  position: relative;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scrollbar-width: thin;
  scrollbar-color: var(--atlas-line) transparent;
}
.event-stops {
  display: flex;
  width: max-content;
  padding: 8px calc(50% - 90px) 12px;
}
.event-stops button {
  position: relative;
  flex: 0 0 180px;
  width: 180px;
  text-align: left;
  background: transparent;
  padding: 0 18px;
  white-space: normal;
  color: var(--atlas-muted);
}
.event-stops b {
  display: block;
  margin-bottom: 16px;
  font: 500 18px/1.2 var(--atlas-number-font);
  font-variant-numeric: tabular-nums;
}
.event-stops button::before {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  height: 1px;
  top: 31px;
  background: var(--atlas-line);
}
.event-stops button::after {
  content: '';
  position: absolute;
  left: 18px;
  top: 27px;
  width: 7px;
  height: 7px;
  border: 1px solid var(--atlas-line);
  background: var(--atlas-panel-solid);
  border-radius: 50%;
}
.event-stops span {
  display: block;
  padding: 8px 10px;
  min-height: 56px;
  background: var(--atlas-panel);
  border: 1px solid var(--atlas-faint-line);
  border-radius: var(--atlas-radius-control);
  font-size: 12px;
  line-height: 1.65;
}
.event-stops button[aria-current='step'] {
  color: var(--atlas-paper);
}
.event-stops button[aria-current='step'] b {
  color: var(--current-period-color);
}
.event-stops button[aria-current='step']::after {
  background: var(--current-period-color);
  border-color: var(--current-period-color);
  box-shadow: 0 0 0 3px var(--atlas-panel-solid);
}
.event-stops button[aria-current='step'] span {
  box-shadow: inset 0 -2px var(--current-period-color);
}
#story-empty {
  text-align: center;
  color: var(--atlas-muted);
}
body .era-panel {
  max-height: calc(100dvh - var(--atlas-timeline-space) - 118px);
}
body[data-timeline-mode='story'] .era-panel {
  left: auto;
  right: calc(var(--atlas-edge) + 110px);
  width: 300px;
  max-height: calc(100dvh - var(--atlas-timeline-space) - 100px);
}
body[data-timeline-mode='story'] .era-year strong {
  font-size: 36px;
}
body[data-timeline-mode='story'] #event-title {
  font: 22px/1.6 var(--atlas-title-font);
}
body[data-timeline-mode='story'] #era-description {
  font-size: 16px;
}
body[data-timeline-mode='story'] .event-context {
  padding-top: 15px;
}
@media (prefers-reduced-motion: no-preference) {
  #dynasty-bands > button,
  #dynasty-bands > button::before {
    transition:
      color 180ms,
      background-color 180ms,
      border-color 180ms,
      opacity 180ms;
  }
}
@media (prefers-reduced-transparency: reduce) {
  .timeline::before {
    background: var(--atlas-panel-solid);
    inset-block-start: -8px;
  }
}
@media (max-width: 900px) {
  .timeline {
    padding-inline: 0;
  }
  .timeline-toolbar {
    gap: 6px;
  }
  .playback-controls {
    gap: 3px;
  }
  body[data-timeline-mode='story'] .era-panel {
    width: 270px;
  }
}
@media (max-width: 600px) {
  .timeline-toolbar {
    grid-template-columns: 1fr auto;
  }
  .timeline-tools {
    grid-column: 2;
  }
  .playback-controls {
    grid-row: 2;
    grid-column: 1 / -1;
    justify-content: center;
  }
  .timeline-settings {
    padding-inline: 14px;
  }
  .year-controls {
    flex-wrap: wrap;
    gap: 10px;
  }
  #dynasty-nav {
    grid-template-columns: repeat(4, 1fr);
  }
}