/* Further reading: timeline */

:where(.scene-timeline) {
  --tl-0: var(--warning);
  --tl-1: #7a5aa6;
  --tl-2: var(--primary);
  --tl-3: var(--success);
  --tl-4: var(--accent);
  --tl-5: #3b6fb6;
}

:where(.scene-timeline) .timeline-scroll {
  overflow-x: auto;
}

/* Year labels stay legible on a phone; the axis scrolls instead of shrinking. */
:where(.scene-timeline) .timeline-svg {
  min-width: 640px;
}

:where(.scene-timeline) .tl-axis line {
  stroke: var(--border-strong);
  stroke-width: 1.5;
}

:where(.scene-timeline) .tl-axis .tl-break {
  stroke: var(--text-faint);
}

:where(.scene-timeline) .tl-axis text {
  fill: var(--text-muted);
  font-size: 12px;
}

:where(.scene-timeline) .tl-dot circle {
  stroke: var(--surface);
  stroke-width: 2;
  transition:
    opacity 0.15s,
    r 0.15s;
}

:where(.scene-timeline) .tl-dot:hover circle,
:where(.scene-timeline) .tl-dot:focus-visible circle {
  r: 9;
}

:where(.scene-timeline) .tl-dot:focus-visible {
  outline: none;
}

:where(.scene-timeline) .tl-dot:focus-visible circle {
  stroke: var(--text);
}

:where(.scene-timeline) .g0 circle,
:where(.scene-timeline) .g0 .swatch {
  fill: var(--tl-0);
  background: var(--tl-0);
}

:where(.scene-timeline) .g1 circle,
:where(.scene-timeline) .g1 .swatch {
  fill: var(--tl-1);
  background: var(--tl-1);
}

:where(.scene-timeline) .g2 circle,
:where(.scene-timeline) .g2 .swatch {
  fill: var(--tl-2);
  background: var(--tl-2);
}

:where(.scene-timeline) .g3 circle,
:where(.scene-timeline) .g3 .swatch {
  fill: var(--tl-3);
  background: var(--tl-3);
}

:where(.scene-timeline) .g4 circle,
:where(.scene-timeline) .g4 .swatch {
  fill: var(--tl-4);
  background: var(--tl-4);
}

:where(.scene-timeline) .g5 circle,
:where(.scene-timeline) .g5 .swatch {
  fill: var(--tl-5);
  background: var(--tl-5);
}

.scene-timeline[data-group="0"] .tl-dot:not(.g0),
.scene-timeline[data-group="1"] .tl-dot:not(.g1),
.scene-timeline[data-group="2"] .tl-dot:not(.g2),
.scene-timeline[data-group="3"] .tl-dot:not(.g3),
.scene-timeline[data-group="4"] .tl-dot:not(.g4),
.scene-timeline[data-group="5"] .tl-dot:not(.g5) {
  opacity: 0.2;
}

:where(.scene-timeline) .timeline-info {
  min-height: 3em;
  margin: 10px 0 0;
  color: var(--text-muted);
  font-size: 0.9rem;
}

:where(.scene-timeline) .timeline-info b {
  display: block;
  color: var(--text);
}

:where(.scene-timeline) .timeline-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  margin: 10px 0 0;
  padding: 0;
  color: var(--text-muted);
  font-size: 0.84rem;
  list-style: none;
}

:where(.scene-timeline) .timeline-legend li {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  cursor: default;
}

:where(.scene-timeline) .timeline-legend .swatch {
  width: 11px;
  height: 11px;
  border-radius: 50%;
}

/* A jump from the timeline lands below the sticky site bar and marks the entry. */
.reading-list li {
  scroll-margin-top: 96px;
}

.reading-list li:target {
  background: var(--accent-soft);
  box-shadow:
    -10px 0 0 var(--accent-soft),
    10px 0 0 var(--accent-soft);
}