/**
 * History timeline — scoped under .ngu-tl.
 *
 * Everything themeable is a custom property with a fallback, so rewiring to the
 * site tokens is a one-block edit at the top. Typefaces are deliberately not
 * set: the timeline inherits the page's type and only controls scale, weight
 * and tracking.
 */

.ngu-tl {
  /* Defaults match the site palette; History.tsx overrides accent and
     surface per section so the rail sits on the right background. */
  --tl-ink: #16343a;
  --tl-muted: #4a6b72;
  --tl-faint: #8aa7ad;
  --tl-rail: #cfe4e8;
  --tl-surface: #ffffff;
  --tl-accent: #138ba0;
  --tl-accent-soft: color-mix(in srgb, var(--tl-accent) 12%, transparent);

  --tl-gutter: 5rem;
  --tl-rail-x: 1.75rem;
  --tl-rail-w: 2px;

  color: var(--tl-ink);
}

@media (max-width: 640px) {
  .ngu-tl {
    --tl-gutter: 3rem;
    --tl-rail-x: 1rem;
  }
}

/* ——— Decade block ——————————————————————————————————————————————— */

.ngu-tl__decade {
  position: relative;
}

/* The rail. One per decade block so the pre-program run can change style
   without breaking the line's continuity. */
.ngu-tl__decade::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: var(--tl-rail-x);
  width: var(--tl-rail-w);
  background: var(--tl-rail);
}

.ngu-tl__decade--pre::before {
  background: none;
  border-left: var(--tl-rail-w) dashed var(--tl-rail);
  opacity: 0.7;
}

/* Last decade fades out rather than stopping dead. */
.ngu-tl__decade:last-child::before {
  bottom: 2rem;
  mask-image: linear-gradient(to bottom, #000 60%, transparent);
}

.ngu-tl__decade--pre {
  color: var(--tl-muted);
}

/* ——— Decade header ——————————————————————————————————————————————— */

.ngu-tl__decadeHead {
  position: relative;
  display: grid;
  grid-template-columns: var(--tl-gutter) minmax(0, 1fr);
  align-items: start;
  padding-block: 3.5rem 1.75rem;
}

.ngu-tl__decade:first-child .ngu-tl__decadeHead {
  padding-block-start: 0.5rem;
}

/* Numeral breaks the rail. */
.ngu-tl__decadeNum {
  position: relative;
  z-index: 1;
  margin-left: calc(var(--tl-rail-x) * -1 + 0.125rem);
  padding-block: 0.35rem;
  background: var(--tl-surface);
  font-size: 0.9375rem;
  font-weight: 650;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.01em;
  line-height: 1.1;
  writing-mode: vertical-rl;
  text-orientation: sideways;
  color: var(--tl-accent);
}

.ngu-tl__decade--pre .ngu-tl__decadeNum {
  color: var(--tl-faint);
}

.ngu-tl__decadeTitle {
  font-size: clamp(1.5rem, 1.1rem + 1.6vw, 2.125rem);
  font-weight: 600;
  line-height: 1.12;
  letter-spacing: -0.018em;
  margin: 0;
  max-width: 22ch;
}

.ngu-tl__decadeTagline {
  margin: 0.5rem 0 0;
  font-size: 1.0625rem;
  line-height: 1.5;
  color: var(--tl-muted);
  max-width: 54ch;
}

.ngu-tl__decadeBlurb {
  margin: 0.875rem 0 0;
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--tl-muted);
  max-width: 62ch;
}

.ngu-tl__gapNote {
  margin: 1rem 0 0;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.375rem 0.75rem;
  border: 1px dashed var(--tl-rail);
  border-radius: 999px;
  font-size: 0.8125rem;
  color: var(--tl-faint);
}

/* ——— Year node ———————————————————————————————————————————————— */

.ngu-tl__year {
  position: relative;
}

.ngu-tl__yearBtn {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: var(--tl-gutter) minmax(0, 1fr) auto;
  align-items: center;
  width: 100%;
  padding-block: 0.6875rem;
  background: none;
  border: 0;
  text-align: left;
  cursor: pointer;
  color: inherit;
  font: inherit;
  border-radius: 0.375rem;
}

.ngu-tl__yearBtn:hover .ngu-tl__yearLabel {
  color: var(--tl-accent);
}

.ngu-tl__yearBtn:focus-visible {
  outline: 2px solid var(--tl-accent);
  outline-offset: 2px;
}

/* Dot sits on the rail; --tl-dot is set inline from the year's item count, so
   scrolling the page gives you the organization's density at a glance. */
.ngu-tl__dot {
  position: relative;
  justify-self: start;
  margin-left: calc(var(--tl-rail-x) - (var(--tl-dot, 8px) / 2) + (var(--tl-rail-w) / 2));
  width: var(--tl-dot, 8px);
  height: var(--tl-dot, 8px);
  border-radius: 50%;
  background: var(--tl-rail);
  box-shadow: 0 0 0 4px var(--tl-surface);
  transition: background-color 140ms ease, transform 140ms ease;
}

.ngu-tl__yearBtn:hover .ngu-tl__dot {
  background: var(--tl-accent);
}

.ngu-tl__year--featured .ngu-tl__dot {
  background: var(--tl-accent);
}

.ngu-tl__year--featured .ngu-tl__dot::after {
  content: '';
  position: absolute;
  inset: -5px;
  border: 1.5px solid var(--tl-accent);
  border-radius: 50%;
  opacity: 0.45;
}

.ngu-tl__year--open .ngu-tl__dot {
  background: var(--tl-accent);
  transform: scale(1.15);
}

.ngu-tl__decade--pre .ngu-tl__dot {
  background: var(--tl-surface);
  border: 1.5px solid var(--tl-rail);
}

.ngu-tl__yearLabel {
  font-size: 1.125rem;
  font-weight: 550;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
  transition: color 140ms ease;
}

.ngu-tl__yearCount {
  font-size: 0.8125rem;
  font-variant-numeric: tabular-nums;
  color: var(--tl-faint);
  padding-right: 0.25rem;
}

.ngu-tl__year--empty .ngu-tl__yearLabel {
  color: var(--tl-faint);
  font-weight: 450;
}

/* ——— Expanded panel ——————————————————————————————————————————— */

.ngu-tl__panel {
  padding: 0.25rem 0 1.5rem var(--tl-gutter);
  animation: ngu-tl-reveal 220ms cubic-bezier(0.2, 0.7, 0.3, 1) both;
}

@keyframes ngu-tl-reveal {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
}

.ngu-tl__month {
  margin-top: 1.5rem;
}

.ngu-tl__month:first-child {
  margin-top: 0.5rem;
}

.ngu-tl__monthLabel {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin: 0 0 0.625rem;
  font-size: 0.8125rem;
  font-weight: 550;
  color: var(--tl-muted);
}

.ngu-tl__monthLabel::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--tl-rail);
  opacity: 0.6;
}

.ngu-tl__undated .ngu-tl__monthLabel {
  font-style: italic;
  font-weight: 450;
  color: var(--tl-faint);
}

.ngu-tl__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.125rem;
}

/* ——— Entry ————————————————————————————————————————————————————— */

.ngu-tl__entry {
  display: grid;
  grid-template-columns: 2.75rem minmax(0, 1fr);
  gap: 0.75rem;
  padding: 0.5rem 0.75rem 0.5rem 0;
  border-radius: 0.5rem;
  text-decoration: none;
  color: inherit;
}

a.ngu-tl__entry:hover {
  background: var(--tl-accent-soft);
}

a.ngu-tl__entry:focus-visible {
  outline: 2px solid var(--tl-accent);
  outline-offset: 1px;
}

.ngu-tl__entryDay {
  font-size: 0.8125rem;
  font-variant-numeric: tabular-nums;
  color: var(--tl-faint);
  padding-top: 0.1875rem;
  text-align: right;
}

.ngu-tl__entryTitle {
  display: block;
  font-size: 0.9375rem;
  font-weight: 500;
  line-height: 1.45;
}

a.ngu-tl__entry:hover .ngu-tl__entryTitle {
  color: var(--tl-accent);
}

.ngu-tl__entryMeta {
  display: block;
  margin-top: 0.125rem;
  font-size: 0.8125rem;
  color: var(--tl-muted);
}

.ngu-tl__entryBlurb {
  margin: 0.375rem 0 0;
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--tl-muted);
  max-width: 64ch;
}

/* Kind marker: a shape, not a colored pill, so a screenful of entries stays
   calm and the type still carries the hierarchy. */
.ngu-tl__kind {
  display: inline-block;
  width: 0.5rem;
  height: 0.5rem;
  margin-right: 0.5rem;
  vertical-align: 0.0625rem;
  background: var(--tl-faint);
}

.ngu-tl__kind--milestone {
  border-radius: 50%;
  background: var(--tl-accent);
}

.ngu-tl__kind--event {
  border-radius: 1px;
}

.ngu-tl__kind--award {
  clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
}

.ngu-tl__kind--person {
  border-radius: 50%;
  background: none;
  box-shadow: inset 0 0 0 1.5px var(--tl-faint);
}

/* ——— Featured entries ————————————————————————————————————————— */

.ngu-tl__featured {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
}

.ngu-tl__entry--featured {
  grid-template-columns: minmax(0, 1fr);
  padding: 1rem 1.125rem;
  border-left: 2px solid var(--tl-accent);
  background: var(--tl-accent-soft);
  border-radius: 0 0.5rem 0.5rem 0;
}

.ngu-tl__entry--featured .ngu-tl__entryTitle {
  font-size: 1.0625rem;
  font-weight: 600;
  letter-spacing: -0.008em;
}

.ngu-tl__entry--featured .ngu-tl__entryDay {
  text-align: left;
  padding: 0 0 0.25rem;
}

a.ngu-tl__entry--featured:hover {
  background: color-mix(in srgb, var(--tl-accent) 18%, transparent);
}

/* ——— Empty state ——————————————————————————————————————————————— */

.ngu-tl__empty {
  padding: 0.5rem 0 1.25rem var(--tl-gutter);
  font-size: 0.875rem;
  color: var(--tl-faint);
}

@media (prefers-reduced-motion: reduce) {
  .ngu-tl *,
  .ngu-tl *::before,
  .ngu-tl *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* ——— Toolbar + utilities ————————————————————————————————————— */

.ngu-tl__toolbar {
  display: flex;
  justify-content: flex-end;
  padding-bottom: 1rem;
}

.ngu-tl__toolbarBtn {
  padding: 0.375rem 0.75rem;
  border: 1px solid var(--tl-rail);
  border-radius: 999px;
  background: none;
  color: var(--tl-muted);
  font: inherit;
  font-size: 0.8125rem;
  cursor: pointer;
  transition: color 140ms ease, border-color 140ms ease;
}

.ngu-tl__toolbarBtn:hover {
  color: var(--tl-accent);
  border-color: var(--tl-accent);
}

.ngu-tl__toolbarBtn:focus-visible {
  outline: 2px solid var(--tl-accent);
  outline-offset: 2px;
}

.ngu-tl__emptyState {
  padding: 3rem 0;
  color: var(--tl-muted);
  font-size: 0.9375rem;
}

.ngu-tl__srOnly {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ——— Upcoming block ——————————————————————————————————————————
   Opens upward: the toggle is first in the DOM, column-reverse puts the
   list above it. Faded because none of it has happened yet. */

.ngu-tl__upcoming {
  position: relative;
  display: flex;
  flex-direction: column-reverse;
  padding-bottom: 0.5rem;
}

.ngu-tl__upcoming::before {
  content: '';
  position: absolute;
  top: 1.25rem;
  bottom: 0;
  left: var(--tl-rail-x);
  border-left: var(--tl-rail-w) dashed var(--tl-rail);
}

.ngu-tl__upcomingBtn {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: var(--tl-gutter) minmax(0, 1fr) auto;
  align-items: center;
  width: 100%;
  padding-block: 0.75rem;
  background: none;
  border: 0;
  font: inherit;
  color: var(--tl-muted);
  text-align: left;
  cursor: pointer;
}

.ngu-tl__upcomingBtn:hover {
  color: var(--tl-accent);
}

.ngu-tl__upcomingBtn:focus-visible {
  outline: 2px solid var(--tl-accent);
  outline-offset: 2px;
  border-radius: 0.375rem;
}

.ngu-tl__upcomingDot {
  justify-self: start;
  margin-left: calc(var(--tl-rail-x) - 4px + (var(--tl-rail-w) / 2));
  width: 8px;
  height: 8px;
  border-radius: 50%;
  border: 1.5px dashed var(--tl-accent);
  box-shadow: 0 0 0 4px var(--tl-surface);
}

.ngu-tl__upcomingLabel {
  font-size: 0.875rem;
}

.ngu-tl__chevron {
  font-size: 0.75rem;
  padding-right: 0.25rem;
}

/* Everything above the toggle is provisional, and reads that way. */
.ngu-tl__upcomingList {
  opacity: 0.62;
  animation: ngu-tl-rise 240ms cubic-bezier(0.2, 0.7, 0.3, 1) both;
}

.ngu-tl__upcomingList:hover,
.ngu-tl__upcomingList:focus-within {
  opacity: 1;
}

.ngu-tl__upcomingList .ngu-tl__dot {
  background: var(--tl-surface);
  border: 1.5px dashed var(--tl-accent);
}

@keyframes ngu-tl-rise {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
}

/* ——— Event / org / award logo ————————————————————————————————— */

.ngu-tl__logo {
  display: inline-block;
  width: 1.125rem;
  height: 1.125rem;
  margin-right: 0.5rem;
  vertical-align: -0.1875rem;
  object-fit: contain;
  border-radius: 2px;
}

.ngu-tl__entry--featured .ngu-tl__logo {
  width: 1.5rem;
  height: 1.5rem;
  vertical-align: -0.3125rem;
}

/* ——— People roster ——————————————————————————————————————————— */

.ngu-tl__entryWrap {
  display: block;
}

.ngu-tl__roster {
  padding: 0.125rem 0 0.5rem 3.5rem;
}

.ngu-tl__roster--featured {
  padding: 0.5rem 1.125rem 1rem;
  border-left: 2px solid var(--tl-accent);
  background: var(--tl-accent-soft);
  margin-top: -0.5rem;
  border-radius: 0 0 0.5rem 0;
}

.ngu-tl__rosterTeam {
  display: block;
  margin-bottom: 0.5rem;
  font-size: 0.75rem;
  color: var(--tl-faint);
}

.ngu-tl__people {
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem 1rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.ngu-tl__person {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.ngu-tl__personPhoto {
  width: 1.75rem;
  height: 1.75rem;
  border-radius: 50%;
  object-fit: cover;
  background: var(--tl-accent-soft);
  flex: none;
}

.ngu-tl__personPhoto--blank {
  display: grid;
  place-items: center;
  font-size: 0.625rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--tl-accent);
}

.ngu-tl__personName {
  font-size: 0.8125rem;
  line-height: 1.25;
}

.ngu-tl__personTitle {
  display: block;
  font-size: 0.6875rem;
  color: var(--tl-faint);
}

/* ——— Kind markers, continued ————————————————————————————————— */

.ngu-tl__kind--organization {
  border-radius: 2px;
  background: none;
  box-shadow: inset 0 0 0 1.5px var(--tl-faint);
}

.ngu-tl__kind--people {
  border-radius: 50%;
  background: none;
  box-shadow: inset 0 0 0 1.5px var(--tl-faint);
}

.ngu-tl__entryBody {
  display: block;
  min-width: 0;
}