.repo-page {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--spacing-xl) var(--spacing-lg) var(--spacing-2xl);
}

.repo-page__masthead {
  position: relative;
  isolation: isolate;
  display: grid;
  grid-template-columns: 4rem minmax(0, 1fr);
  min-height: 22rem;
  background-image: var(--repo-feature-image);
  background-position: center;
  background-size: cover;
  border-top: 3px solid var(--text-primary);
  border-bottom: 1px solid var(--border-strong);
}

.repo-page__masthead::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: oklch(96% 0.018 230 / 0.82);
}

.repo-page__rail {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: var(--spacing-md) var(--spacing-sm);
  border-right: 1px solid var(--border-strong);
  color: var(--text-muted);
  font-family: var(--font-code);
  font-size: 0.68rem;
  writing-mode: vertical-rl;
  text-transform: uppercase;
}

.repo-page__intro {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: var(--spacing-xl) clamp(var(--spacing-lg), 6vw, 6rem);
}

.repo-page__intro h1 {
  margin: 0 0 1.8rem;
  color: var(--text-primary);
  font-family: var(--font-code);
  font-size: clamp(4rem, 12vw, 8.5rem);
  font-weight: 700;
  letter-spacing: -0.09em;
  line-height: 0.82;
}

.repo-page__intro p {
  max-width: 28rem;
  margin: 0;
  color: var(--text-secondary);
  font-size: var(--font-size-lg);
  line-height: 1.5;
}

.repo-page__meta {
  display: flex;
  gap: var(--spacing-lg);
  align-items: center;
  padding: 0.7rem 0;
  border-bottom: 1px solid var(--border-strong);
  color: var(--text-muted);
  font-family: var(--font-code);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
}

.repo-page__meta { display: none; }

.repo-page__meta span:first-child { color: var(--accent); }
.repo-page__meta span:last-child { margin-left: auto; }
.repo-page__rail span,
.repo-page__meta span { visibility: hidden; }

.repo-content { max-width: none; }

.repo-timeline {
  --timeline-line: oklch(71% 0.04 230);
  display: grid;
  gap: 0;
  position: relative;
  margin: var(--spacing-xl) 0 var(--spacing-lg);
  padding-left: 8.5rem;
}

.repo-timeline::before {
  content: "";
  position: absolute;
  top: 0.9rem;
  bottom: 1.2rem;
  left: 7rem;
  width: 1px;
  background: var(--timeline-line);
}

.repo-timeline__item {
  position: relative;
  padding-bottom: 2.4rem;
}

.repo-timeline__item:last-child { padding-bottom: 0; }

.repo-timeline__item::before {
  content: "";
  position: absolute;
  top: 1.4rem;
  left: -1.5rem;
  width: 0.55rem;
  height: 0.55rem;
  background: var(--bg-primary);
  border: 2px solid var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 0 4px var(--bg-primary);
  transform: translateX(-50%);
}

.repo-timeline__date {
  position: absolute;
  top: 1rem;
  right: calc(100% + 2.25rem);
  width: 6rem;
  color: var(--text-muted);
  font-family: var(--font-code);
  font-size: 0.75rem;
  letter-spacing: 0.03em;
  text-align: right;
  white-space: nowrap;
}

.repo-timeline__card {
  padding: 1.2rem 1.35rem 1.3rem;
  background: color-mix(in oklch, var(--bg-card) 76%, transparent);
  border: 1px solid var(--border);
  border-left: 3px solid var(--text-primary);
  transition: border-color var(--transition-speed) var(--transition-fn), transform var(--transition-speed) var(--transition-fn), box-shadow var(--transition-speed) var(--transition-fn);
}

.repo-timeline__card:hover {
  border-color: var(--accent);
  border-left-color: var(--accent);
  box-shadow: 8px 8px 0 var(--accent-soft);
  transform: translateX(4px);
}

.repo-timeline__top {
  display: flex;
  justify-content: space-between;
  gap: var(--spacing-md);
  color: var(--text-muted);
  font-family: var(--font-code);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
}

.repo-timeline__top span:first-child { color: var(--accent); }

.repo-timeline__card h2 {
  margin: 0.7rem 0 0.35rem;
  color: var(--text-primary);
  font-family: var(--font-display);
  font-size: clamp(1.45rem, 3vw, 2.25rem);
  line-height: 1.1;
}

.repo-timeline__card h2 a { color: inherit; text-decoration: none; }

.repo-timeline__card h2 a:hover,
.repo-timeline__card h2 a:focus-visible {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 0.16em;
}

.repo-timeline__card p {
  max-width: 60ch;
  margin: 0;
  color: var(--text-secondary);
}

@media (max-width: 640px) {
  .repo-page { padding-top: var(--spacing-lg); }
  .repo-page__masthead { grid-template-columns: 2.5rem minmax(0, 1fr); min-height: 20rem; }
  .repo-page__rail { font-size: 0.58rem; }
  .repo-page__intro { padding: var(--spacing-lg); }
  .repo-page__meta { gap: var(--spacing-sm); font-size: 0.6rem; }
  .repo-page__meta span:last-child { display: none; }
  .repo-timeline { padding-left: 2rem; }
  .repo-timeline::before { left: 0.35rem; }
  .repo-timeline__item::before { top: 0.4rem; left: -1.65rem; }
  .repo-timeline__date {
    position: static;
    display: block;
    width: auto;
    margin: 0 0 0.55rem;
    text-align: left;
  }
  .repo-timeline__card { padding: 1rem; }
}

@media (prefers-reduced-motion: reduce) {
  .repo-timeline__card:hover { transform: none; }
}