/* Timeline uses the site's existing surfaces, typography and theme tokens. */
:root {
  --timeline-event: #35645f;
  --timeline-fellowship: #76518a;
  --timeline-education: #4e6085;
  --timeline-research: #7c5936;
  --timeline-milestone: #726424;
}

:root[data-theme="dark"] {
  --timeline-event: #8bc4b8;
  --timeline-fellowship: #c1a4d4;
  --timeline-education: #a5b8df;
  --timeline-research: #d7b18a;
  --timeline-milestone: #d0c285;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.timeline-intro-links,
.timeline-note {
  margin: 0.5rem 0 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.timeline-ongoing {
  margin: 0.8rem 0;
}

.timeline-ongoing__label {
  color: var(--accent-ink);
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.timeline-ongoing p {
  display: inline;
  margin: 0 0 0 0.4rem;
  font-size: 0.8rem;
  color: var(--muted);
}

.timeline-tools {
  margin: 0.8rem 0 1.25rem;
}

.timeline-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.timeline-mobile-filter {
  display: none;
}

.timeline-filter {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  min-height: 2.75rem;
  padding: 0.4rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: 7px;
  color: var(--text);
  background: transparent;
  font: inherit;
  font-size: 0.76rem;
  font-weight: 650;
  cursor: pointer;
}

.timeline-filter svg {
  color: var(--timeline-color, var(--accent-ink));
}

.timeline-filter:hover {
  background: var(--accent-soft);
  border-color: var(--accent-border-hover);
}

.timeline-filter[aria-pressed="true"] {
  background: var(--accent-solid);
  color: var(--on-accent);
  border-color: var(--accent-solid);
}

.timeline-filter[aria-pressed="true"] svg {
  color: inherit;
}

.timeline-filter:focus-visible {
  outline: 3px solid var(--accent-ink);
  outline-offset: 3px;
}

.timeline-results {
  margin: 0.4rem 0 0;
  color: var(--muted);
  font-size: 0.82rem;
}

.timeline-group {
  display: grid;
  grid-template-columns: 5.8rem minmax(0, 1fr);
  gap: 1rem;
  margin-top: 1.1rem;
  scroll-margin-top: 7rem;
}

.timeline-group__title {
  margin: 0.2rem 0 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.35rem;
  line-height: 1.3;
  color: var(--accent-ink);
}

.timeline-group--forthcoming .timeline-group__title {
  font-size: 0.94rem;
  padding-top: 0.1rem;
}

.timeline-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.timeline-item {
  position: relative;
  padding: 0 0 0.75rem 2rem;
}

.timeline-item::before {
  content: "";
  position: absolute;
  top: 1rem;
  left: 0.8rem;
  bottom: -1rem;
  border-left: 1px solid var(--border);
}

.timeline-item:last-child::before {
  bottom: 0.75rem;
}

.timeline-item__marker {
  position: absolute;
  z-index: 1;
  top: 0.1rem;
  left: 0;
  display: grid;
  place-items: center;
  width: 1.7rem;
  height: 1.7rem;
  border: 1px solid var(--border);
  border-radius: 50%;
  color: var(--timeline-color);
  background: var(--surface);
}

.timeline-color--talk { --timeline-color: var(--accent-ink); }
.timeline-color--event { --timeline-color: var(--timeline-event); }
.timeline-color--fellowship { --timeline-color: var(--timeline-fellowship); }
.timeline-color--education { --timeline-color: var(--timeline-education); }
.timeline-color--research { --timeline-color: var(--timeline-research); }
.timeline-color--milestone { --timeline-color: var(--timeline-milestone); }

.timeline-filter svg,
.timeline-category svg,
.timeline-item__marker svg {
  width: 1rem;
  height: 1rem;
  flex-shrink: 0;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.timeline-card {
  display: grid;
  grid-template-columns: 8.8rem minmax(0, 1fr);
  gap: 0.75rem;
  padding: 0 0 0.55rem;
  border-bottom: 1px solid var(--border);
  scroll-margin-top: 8rem;
  overflow-wrap: anywhere;
}

.timeline-card--forthcoming {
  border-bottom-style: dashed;
}

.timeline-card__when {
  padding-top: 0.1rem;
}

.timeline-card__body {
  min-width: 0;
}

.timeline-card__date {
  margin: 0;
  color: var(--muted);
  font-size: 0.77rem;
  line-height: 1.45;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.timeline-status {
  display: inline-block;
  margin-top: 0.3rem;
  padding: 0.1rem 0.45rem;
  border: 1px solid var(--accent-border);
  border-radius: 4px;
  color: var(--accent-ink);
  background: var(--accent-soft);
  font-size: 0.62rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.timeline-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.9rem;
  margin-top: 0;
}

.timeline-card__extras {
  display: flex;
  align-items: baseline;
  gap: 0 0.8rem;
  flex-wrap: wrap;
}

.timeline-category {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  color: var(--timeline-color);
  font-size: 0.7rem;
  font-weight: 700;
}

.timeline-category svg {
  width: 0.85rem;
  height: 0.85rem;
}

.timeline-card__title {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.07rem;
  line-height: 1.3;
  font-weight: 700;
}

.timeline-card__meta,
.timeline-card__presentation {
  margin: 0.2rem 0 0;
  font-size: 0.8rem;
  color: var(--muted);
}

.timeline-card__presentation {
  margin-top: 0.6rem;
}

.timeline-details {
  margin-top: 0;
  font-size: 0.8rem;
}

.timeline-details[open] {
  flex-basis: 100%;
}

.timeline-details summary {
  width: fit-content;
  min-height: 2.75rem;
  padding-block: 0.5rem;
  color: var(--accent-ink);
  cursor: pointer;
}

.timeline-details p {
  margin: 0 0 0.5rem;
  color: var(--muted);
}

.timeline-card__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0 1rem;
  margin-top: 0;
}

.timeline-card__links a {
  display: inline-flex;
  align-items: center;
  min-height: 2.75rem;
  font-size: 0.8rem;
  font-weight: 700;
}

.timeline-note {
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

[data-page="timeline"] .hero {
  padding-bottom: 0.9rem;
}

[data-page="timeline"] .hero__title {
  font-size: 2.5rem;
}

[data-page="timeline"] .hero__summary {
  font-size: 0.93rem;
  margin-top: 0.5rem;
}

@media (max-width: 640px) {
  .timeline-filters {
    display: none;
  }

  .timeline-mobile-filter {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 0.85rem;
    color: var(--muted);
  }

  .timeline-mobile-filter select {
    flex: 1;
    min-width: 0;
    min-height: 2.75rem;
    padding: 0.5rem;
    font: inherit;
    font-weight: 650;
    background: var(--control-bg);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 7px;
  }

  .timeline-mobile-filter select:focus-visible {
    outline: 3px solid var(--accent-ink);
    outline-offset: 3px;
  }

  .timeline-group {
    grid-template-columns: minmax(0, 1fr);
    gap: 0.7rem;
  }

  .timeline-group__title {
    font-size: 1.25rem;
  }

  .timeline-item {
    padding-left: 2rem;
  }

  .timeline-card {
    grid-template-columns: minmax(0, 1fr);
    gap: 0.3rem;
  }

  .timeline-card__when {
    display: flex;
    gap: 0.35rem 0.6rem;
    align-items: baseline;
    flex-wrap: wrap;
    padding: 0;
  }

  .timeline-status {
    margin-top: 0;
  }

  .timeline-card__title {
    font-size: 1.05rem;
  }
}

@media (max-width: 480px) {
  [data-page="timeline"] .site-nav {
    font-size: 0.84rem;
  }

  [data-page="timeline"] .hero__title {
    font-size: 2.15rem;
  }
}

@media print {
  .timeline-tools { display: none; }
  .timeline-card { break-inside: avoid; }
}