.timeline-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(300px, 0.75fr);
  gap: 18px;
  align-items: stretch;
}

.timeline-hero-copy,
.timeline-hero-panel,
.timeline-pinned,
.timeline-item,
.timeline-gate,
.timeline-empty {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--surface) 94%, white 6%);
  box-shadow: var(--shadow);
}

.timeline-hero-copy {
  position: relative;
  overflow: hidden;
  display: grid;
  gap: 14px;
  padding: 30px;
  background:
    radial-gradient(circle at top right, color-mix(in srgb, var(--accent) 18%, transparent), transparent 36%),
    radial-gradient(circle at bottom left, color-mix(in srgb, var(--accent-strong) 12%, transparent), transparent 30%),
    color-mix(in srgb, var(--surface) 94%, white 6%);
}

.timeline-hero-copy::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg, transparent 0%, transparent 52%, color-mix(in srgb, var(--accent) 6%, transparent) 52%, transparent 100%);
  pointer-events: none;
  opacity: 0.4;
}

.timeline-hero-copy > * {
  position: relative;
  z-index: 1;
}

.timeline-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.timeline-gate {
  display: grid;
  gap: 10px;
  padding: 18px;
  background: color-mix(in srgb, var(--surface) 88%, var(--accent) 12%);
}

.timeline-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: fit-content;
  padding: 10px 14px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface-strong);
  color: var(--accent-strong);
  font-weight: 800;
  text-decoration: none;
}

.timeline-hero-panel {
  display: grid;
  gap: 12px;
  padding: 18px;
}

.timeline-panel-note {
  display: grid;
  gap: 8px;
  color: var(--muted);
}

.timeline-pinned {
  display: grid;
  gap: 14px;
}

.timeline-pin-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
}

.timeline-pin-card {
  display: grid;
  gap: 6px;
  padding: 16px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--surface) 88%, var(--accent) 12%), var(--surface));
  color: inherit;
  text-decoration: none;
  transition: transform 120ms ease, border-color 120ms ease, box-shadow 120ms ease;
}

.timeline-pin-card:hover,
.timeline-pin-card:focus-visible {
  transform: translateY(-1px);
  border-color: color-mix(in srgb, var(--accent) 34%, var(--border));
  box-shadow: var(--shadow);
}

.timeline-pin-label {
  font-weight: 800;
  line-height: 1.2;
}

.timeline-pin-note {
  color: var(--muted);
  font-size: 0.92rem;
}

.timeline-feed {
  display: grid;
  gap: 12px;
}

.timeline-filters {
  display: grid;
  gap: 12px;
}

.timeline-filter-form {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.timeline-filter-group,
.timeline-event-options,
.timeline-filter-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.timeline-scope-option,
.timeline-event-option,
.timeline-filter-submit,
.timeline-filter-reset {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  font-weight: 800;
  text-decoration: none;
}

.timeline-scope-option input,
.timeline-event-option input {
  inline-size: 16px;
  block-size: 16px;
  margin: 0;
}

.timeline-scope-option.is-active,
.timeline-event-option:has(input:checked) {
  border-color: color-mix(in srgb, var(--accent) 45%, var(--border));
  background: color-mix(in srgb, var(--surface) 82%, var(--accent) 18%);
}

.timeline-filter-submit {
  cursor: pointer;
  background: var(--accent);
  color: white;
}

.timeline-filter-reset {
  color: var(--accent-strong);
}

.timeline-item {
  display: grid;
  gap: 10px;
  padding: 20px;
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--surface) 96%, white 4%), var(--surface));
}

.timeline-item h3 {
  margin: 0;
  font-size: 1.15rem;
}

.timeline-item p {
  margin: 0;
  color: var(--muted);
  line-height: 1.55;
}

.timeline-meta,
.timeline-source-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.timeline-meta {
  color: var(--muted);
  font-size: 0.86rem;
}

.timeline-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--surface) 88%, var(--accent) 12%);
  color: var(--text);
  font-size: 0.82rem;
  font-weight: 800;
}

.timeline-chip.is-featured {
  background: color-mix(in srgb, var(--surface) 82%, var(--accent-strong) 18%);
}

.timeline-chip.is-pinned {
  background: color-mix(in srgb, var(--surface) 82%, var(--accent) 18%);
}

.timeline-empty {
  padding: 18px;
  color: var(--muted);
  background: color-mix(in srgb, var(--surface) 92%, white 8%);
}

.timeline-section-note {
  align-self: center;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 700;
}

@media (max-width: 820px) {
  .timeline-hero {
    grid-template-columns: 1fr;
  }

  .timeline-hero-copy,
  .timeline-hero-panel {
    padding: 20px;
  }
}