/* Public changelog */

html.is-changelog-workspace,
body[data-page="changelog"] {
  height: 100%;
  overflow: hidden;
}

body[data-page="changelog"] {
  display: block;
  background: var(--bg);
}

.changelog-grid {
  position: fixed !important;
  z-index: -1 !important;
  inset: 0 !important;
  grid-column: 1;
  grid-row: 1;
  opacity: 0.42;
  background-image:
    linear-gradient(rgba(var(--text-rgb), 0.032) 1px, transparent 1px),
    linear-gradient(90deg, rgba(var(--text-rgb), 0.032) 1px, transparent 1px);
  background-size: 24px 24px;
  mask-image: linear-gradient(to bottom, transparent, #000 16%, #000);
}

.site-header--changelog {
  position: fixed !important;
  z-index: 160 !important;
  inset: 0 0 auto !important;
  min-height: 66px;
  padding: 0;
  overflow: visible !important;
  border-bottom: 1px solid var(--border-soft);
  background: rgba(var(--bg-rgb), 0.9);
  backdrop-filter: blur(18px);
}

.changelog-header__inner {
  display: flex;
  width: 100%;
  max-width: none;
  min-height: 66px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-inline: 0;
}

.changelog-header__context {
  display: grid;
  min-width: 0;
  flex: 1 1 auto;
  gap: 1px;
}

.changelog-header__context p,
.changelog-header__context h1 {
  margin: 0;
}

.changelog-header__context p {
  color: var(--text-tertiary);
  font-family: var(--font-mono);
  font-size: 0.54rem;
  letter-spacing: 0.18em;
}

.changelog-header__context h1 {
  overflow: hidden;
  color: var(--text-secondary);
  font-size: 0.76rem;
  font-weight: 600;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.changelog-nav__current {
  color: var(--text);
  text-decoration-color: currentColor;
  cursor: default;
}

.changelog-shell {
  position: fixed !important;
  z-index: 1 !important;
  inset: 66px 0 0 !important;
  display: grid;
  min-height: 0;
  grid-template-rows: auto 126px minmax(0, 1fr);
  gap: 14px;
  padding: 22px var(--page-gutter) 18px;
}

.changelog-intro {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
}

.changelog-intro .eyebrow,
.changelog-intro h2,
.changelog-intro__meta {
  margin: 0;
}

.changelog-intro .eyebrow {
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.18em;
}

.changelog-intro h2 {
  margin-top: 2px;
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 3vw, 2.9rem);
  line-height: 1.08;
  letter-spacing: -0.045em;
}

.changelog-intro__meta {
  margin-top: 7px;
  color: var(--text-tertiary);
  font-family: var(--font-mono);
  font-size: 0.62rem;
}

.changelog-actions {
  display: inline-flex;
  flex: 0 0 auto;
  gap: 5px;
  padding: 4px;
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  background: var(--surface);
}

.changelog-actions button {
  min-width: 42px;
  min-height: 36px;
  padding: 5px 12px;
  border: 0;
  border-radius: var(--radius-pill);
  color: var(--text-secondary);
  background: transparent;
  cursor: pointer;
  font: inherit;
  font-size: 0.7rem;
}

.changelog-actions button:hover:not(:disabled) {
  color: var(--text);
  background: var(--surface-hover);
}

.changelog-actions button:focus-visible,
.changelog-day:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.changelog-actions button:disabled {
  opacity: 0.34;
  cursor: not-allowed;
}

.changelog-timeline {
  position: relative;
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  background: rgba(var(--surface-rgb), 0.72);
}

.changelog-track {
  position: relative;
  display: flex;
  height: 100%;
  align-items: stretch;
  gap: 0;
  overflow-x: auto;
  overflow-y: hidden;
  overscroll-behavior-inline: contain;
  scrollbar-color: var(--border-strong) transparent;
  scrollbar-width: thin;
  scroll-snap-type: x proximity;
}

.changelog-track::before {
  position: absolute;
  top: 50px;
  right: 0;
  left: 0;
  height: 1px;
  min-width: max(100%, calc(var(--changelog-days, 11) * 150px));
  background: var(--border-strong);
  content: "";
}

.changelog-track__loading {
  display: grid;
  min-width: 100%;
  place-items: center;
  color: var(--text-tertiary);
  font-family: var(--font-mono);
  font-size: 0.7rem;
}

.changelog-track__loading[data-state="error"] {
  color: var(--error);
}

.changelog-day {
  position: relative;
  display: grid;
  min-width: 150px;
  flex: 1 0 150px;
  grid-template-rows: 38px 25px auto;
  justify-items: center;
  padding: 12px 14px 10px;
  border: 0;
  border-right: 1px dashed rgba(var(--text-rgb), 0.08);
  color: var(--text-tertiary);
  background: transparent;
  cursor: pointer;
  scroll-snap-align: center;
}

.changelog-day:last-child {
  padding-right: 42px;
  border-right: 0;
}

.changelog-day:hover {
  color: var(--text-secondary);
  background: rgba(var(--accent-rgb), 0.035);
}

.changelog-day[aria-selected="true"] {
  color: var(--text);
  background: rgba(var(--accent-rgb), 0.07);
}

.changelog-day__node {
  align-self: end;
  width: 10px;
  height: 10px;
  border: 2px solid var(--bg);
  border-radius: 50%;
  background: var(--text-tertiary);
  box-shadow: 0 0 0 1px var(--border-strong);
}

.changelog-day[aria-selected="true"] .changelog-day__node {
  width: 14px;
  height: 14px;
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(var(--accent-rgb), 0.15);
}

.changelog-day:last-child .changelog-day__node {
  background: var(--today);
  box-shadow: 0 0 0 4px rgba(var(--today-rgb), 0.14);
}

.changelog-day__date {
  align-self: center;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.04em;
}

.changelog-day__count {
  color: var(--text-tertiary);
  font-size: 0.6rem;
}

.changelog-detail {
  display: grid;
  min-height: 0;
  grid-template-rows: auto minmax(0, 1fr);
  overflow: hidden;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  background: rgba(var(--surface-rgb), 0.82);
  box-shadow: var(--shadow-subtle);
}

.changelog-detail__header {
  display: flex;
  min-height: 72px;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border-soft);
}

.changelog-detail__meta {
  display: flex;
  align-items: center;
  gap: 22px;
}

.changelog-kind-legend {
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--text-tertiary);
  font-size: 0.6rem;
}

.changelog-kind-legend > span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}

.changelog-detail__header p,
.changelog-detail__header h2 {
  margin: 0;
}

.changelog-detail__header p {
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.54rem;
  letter-spacing: 0.16em;
}

.changelog-detail__header h2 {
  margin-top: 2px;
  font-family: var(--font-mono);
  font-size: 1rem;
}

.changelog-detail__meta > span {
  color: var(--text-tertiary);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  white-space: nowrap;
}

.changelog-marker {
  position: relative;
  display: inline-block;
  width: 13px;
  height: 13px;
  flex: 0 0 auto;
}

.changelog-marker::before {
  position: absolute;
  inset: 2px;
  content: "";
}

.changelog-marker--major::before {
  border: 1.5px solid currentColor;
  transform: rotate(45deg);
}

.changelog-marker--iteration::before {
  background: currentColor;
  clip-path: polygon(50% 4%, 96% 92%, 4% 92%);
}

.changelog-marker--fix::before {
  border: 1.5px solid currentColor;
  border-radius: 50%;
}

.changelog-day-viewport {
  min-height: 0;
  overflow: auto;
  overscroll-behavior: contain;
  scrollbar-color: var(--border-strong) transparent;
  scrollbar-width: thin;
}

.changelog-day-viewport:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}

.changelog-day-stage {
  --day-axis-y: 50%;
  position: relative;
  width: 1440px;
  height: 100%;
  min-height: 540px;
  min-width: 100%;
}

.changelog-hour-grid,
.changelog-event-layer {
  position: absolute;
  inset: 0;
}

.changelog-hour {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 1px;
  border-left: 1px dashed rgba(var(--text-rgb), 0.075);
}

.changelog-hour > span {
  position: absolute;
  top: calc(var(--day-axis-y) + 13px);
  left: 0;
  color: var(--text-tertiary);
  font-family: var(--font-mono);
  font-size: 0.54rem;
  transform: translateX(-50%);
  white-space: nowrap;
}

.changelog-day-axis {
  position: absolute;
  top: var(--day-axis-y);
  right: 58px;
  left: 58px;
  height: 1px;
  background: var(--border-strong);
}

.changelog-day-axis::after {
  position: absolute;
  top: 50%;
  right: -1px;
  width: 8px;
  height: 8px;
  border-top: 1px solid var(--border-strong);
  border-right: 1px solid var(--border-strong);
  content: "";
  transform: translateY(-50%) rotate(45deg);
}

.changelog-event {
  position: absolute;
  top: 0;
  width: 0;
  height: 100%;
  color: var(--accent);
}

.changelog-event__stem {
  position: absolute;
  z-index: 1;
  left: 0;
  width: 1px;
  background: rgba(var(--accent-rgb), 0.42);
}

.changelog-event[data-side="top"] .changelog-event__stem {
  top: calc(var(--event-card-y) + 64px);
  height: calc(var(--day-axis-y) - var(--event-card-y) - 64px);
}

.changelog-event[data-side="bottom"] .changelog-event__stem {
  top: var(--day-axis-y);
  height: calc(var(--event-card-y) - var(--day-axis-y));
}

.changelog-event__marker {
  position: absolute;
  z-index: 3;
  top: var(--day-axis-y);
  left: 0;
  color: var(--text-secondary);
  transform: translate(-50%, -50%);
}

.changelog-event-card {
  position: absolute;
  z-index: 2;
  top: var(--event-card-y);
  left: 0;
  display: grid;
  width: 172px;
  min-height: 64px;
  align-content: start;
  gap: 5px;
  padding: 9px 11px 10px;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  background: rgba(var(--surface-rgb), 0.94);
  box-shadow: var(--shadow-hairline);
  cursor: pointer;
  text-align: left;
  transform: translateX(-50%);
  transition:
    color 160ms ease,
    border-color 160ms ease,
    background-color 160ms ease,
    transform 160ms var(--ease-out);
}

.changelog-event-card:hover {
  color: var(--text);
  border-color: var(--border-strong);
  background: var(--surface-hover);
}

.changelog-event-card:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.changelog-event-card.is-active {
  color: var(--text);
  border-color: rgba(var(--accent-rgb), 0.7);
  background: rgba(var(--accent-rgb), 0.1);
}

.changelog-event:has(.changelog-event-card.is-active) .changelog-event__marker {
  color: var(--accent);
}

.changelog-event-card time {
  color: var(--text-tertiary);
  font-family: var(--font-mono);
  font-size: 0.56rem;
  line-height: 1;
}

.changelog-event-card__title {
  display: -webkit-box;
  overflow: hidden;
  font-size: 0.68rem;
  font-weight: 550;
  line-height: 1.45;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.changelog-error {
  position: fixed;
  z-index: 30;
  inset: auto 24px 24px;
  margin: 0;
  padding: 12px 16px;
  border: 1px solid var(--error);
  border-radius: var(--radius-md);
  color: var(--error);
  background: var(--surface);
}

@media (max-width: 820px) {
  .site-header--changelog,
  .changelog-header__inner {
    min-height: 57px;
  }

  .changelog-header__context,
  .changelog-nav__current {
    display: none;
  }

  .changelog-shell {
    inset-block-start: 57px !important;
    grid-template-rows: auto 116px minmax(0, 1fr);
    gap: 10px;
    padding: 16px 12px 12px;
  }

  .changelog-intro h2 {
    font-size: 1.75rem;
  }

  .changelog-intro__meta {
    max-width: 54vw;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .changelog-detail__header {
    align-items: start;
  }

  .changelog-detail__meta {
    display: grid;
    justify-items: end;
    gap: 6px;
  }

  .changelog-kind-legend {
    gap: 9px;
  }

  .changelog-kind-legend > span {
    gap: 4px;
  }
}

@media (max-width: 520px) {
  .wordmark--modelscience__type,
  .changelog-nav > .nav-button {
    display: none;
  }

  .changelog-intro {
    align-items: center;
  }

  .changelog-intro .eyebrow {
    display: none;
  }

  .changelog-intro__meta {
    max-width: calc(100vw - 178px);
    margin-top: 4px;
  }

  .changelog-actions button {
    min-width: 36px;
    padding-inline: 9px;
  }

  .changelog-day {
    min-width: 128px;
    flex-basis: 128px;
  }

  .changelog-detail__header {
    min-height: 62px;
    padding: 10px 14px;
  }

  .changelog-kind-legend {
    max-width: 166px;
    flex-wrap: wrap;
    justify-content: flex-end;
    line-height: 1.2;
  }

  .changelog-event-card {
    width: 158px;
    padding-inline: 9px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .changelog-track {
    scroll-behavior: auto;
  }
}

@media print {
  html.is-changelog-workspace,
  body[data-page="changelog"] {
    height: auto;
    overflow: visible;
  }

  body[data-page="changelog"] {
    display: block;
    color: var(--print-text);
    background: var(--print-bg);
  }

  .site-header--changelog,
  .changelog-timeline,
  .changelog-actions,
  .changelog-grid {
    display: none;
  }

  .changelog-shell {
    position: static !important;
    inset: auto !important;
    display: block;
  }

  .changelog-detail {
    margin-top: 24px;
    border-color: var(--print-border-soft);
    box-shadow: none;
  }
}