.changelog-hero {
  display: block;
  text-align: left;
  padding: 2rem 1.25rem 2.2rem;
  background:
    radial-gradient(circle at top right, rgba(37, 99, 235, 0.1), transparent 52%),
    radial-gradient(circle at bottom left, rgba(239, 68, 68, 0.08), transparent 48%),
    var(--bg-card);
}

.hero-kicker {
  display: inline-block;
  font: 700 0.66rem var(--mono-font);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.3rem 0.6rem;
  background: #fff;
}

.changelog-hero h2 {
  margin: 0.8rem 0 0;
  max-width: 18ch;
}

.changelog-hero p {
  margin: 0.65rem 0 0;
  color: var(--text-muted);
  font-size: 0.92rem;
}

.hero-chips {
  margin-top: 0.95rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.hero-chips span {
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg-card-muted);
  color: var(--text-dim);
  padding: 0.24rem 0.58rem;
  font: 600 0.7rem var(--mono-font);
}

.changelog-controls {
  display: grid;
  grid-template-columns: 1fr 220px;
  gap: 0.75rem;
  padding: 1rem;
  background: linear-gradient(180deg, #fff, var(--bg-card-muted));
}

.changelog-controls input,
.changelog-controls select {
  min-height: 46px;
  border: 1px solid var(--border-hi);
  border-radius: 12px;
  padding: 0.7rem 0.85rem;
  background: #fff;
  color: var(--text-primary);
  font: 500 0.92rem var(--ui-font);
  box-shadow: var(--shadow-sm);
}

.changelog-controls input:focus,
.changelog-controls select:focus {
  outline: 2px solid rgba(37, 99, 235, 0.25);
  outline-offset: 1px;
  border-color: #93c5fd;
}

.highlight-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.85rem;
  padding: 1rem;
}

.highlight-card {
  border: 1px solid var(--border);
  border-radius: 14px;
  background: #fff;
  padding: 0.95rem;
  box-shadow: var(--shadow-sm);
}

.highlight-card .k {
  font: 600 0.66rem var(--mono-font);
  color: var(--text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.highlight-card .v {
  margin-top: 0.38rem;
  font: 700 1.28rem/1.2 var(--brand-font);
  color: var(--text-primary);
}

.major-milestones {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  padding: 1rem;
}

.major-empty {
  margin: 0;
  color: var(--text-muted);
  font: 500 0.92rem var(--ui-font);
  line-height: 1.5;
}

.major-card {
  border: 1px solid rgba(37, 99, 235, 0.22);
  border-radius: 18px;
  padding: 1.15rem 1.2rem 1.2rem;
  background: linear-gradient(165deg, rgba(255, 255, 255, 0.99), rgba(239, 246, 255, 0.5));
  box-shadow: var(--shadow);
}

.major-card-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 0.85rem;
}

.major-eyebrow {
  font: 700 0.62rem var(--mono-font);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: #1d4ed8;
  margin-bottom: 0.35rem;
}

.major-card-title {
  margin: 0;
  font: 700 1.22rem/1.35 var(--brand-font);
  color: var(--text-primary);
}

.major-card-meta {
  margin-top: 0.4rem;
  color: var(--text-muted);
  font: 500 0.78rem var(--mono-font);
}

.type-pill-major {
  border-radius: 999px;
  padding: 0.26rem 0.6rem;
  font: 700 0.62rem var(--mono-font);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border: 1px solid var(--border);
  background: #fff;
  white-space: nowrap;
}

.type-pill-major.type-feature {
  background: rgba(37, 99, 235, 0.12);
  color: #1d4ed8;
  border-color: rgba(37, 99, 235, 0.25);
}

.major-card-body {
  margin-top: 1rem;
}

.major-card-body .release-item {
  border-left: none;
  padding-left: 0;
}

.release-items-verbose {
  margin-top: 0.85rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.release-item {
  border-left: 3px solid rgba(37, 99, 235, 0.2);
  padding: 0.15rem 0 0.15rem 0.85rem;
}

.release-item-title {
  margin: 0 0 0.45rem;
  font: 700 0.98rem/1.35 var(--ui-font);
  color: var(--text-primary);
}

.release-item-summary {
  margin: 0;
  color: var(--text-dim);
  font-size: 0.93rem;
  line-height: 1.58;
}

.release-item-detail {
  margin: 0.55rem 0 0;
  color: var(--text-dim);
  font-size: 0.9rem;
  line-height: 1.58;
}

.release-timeline {
  display: grid;
  gap: 1rem;
  padding: 1rem;
}

.release-card {
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1rem;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(248, 250, 252, 0.95));
  box-shadow: var(--shadow);
}

.release-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 0.75rem;
}

.release-title {
  margin: 0;
  font: 700 1.08rem/1.28 var(--brand-font);
  color: var(--text-primary);
}

.release-meta {
  margin-top: 0.35rem;
  color: var(--text-muted);
  font: 500 0.72rem var(--mono-font);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.release-impact {
  border-radius: 999px;
  border: 1px solid rgba(37, 99, 235, 0.2);
  background: rgba(37, 99, 235, 0.1);
  color: #1d4ed8;
  font: 700 0.64rem var(--mono-font);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.28rem 0.55rem;
  white-space: nowrap;
}

.release-summary {
  margin: 0.75rem 0 0;
  color: var(--text-dim);
  line-height: 1.55;
}

.release-why {
  margin: 0.6rem 0 0;
  border-left: 3px solid rgba(239, 68, 68, 0.32);
  padding: 0.2rem 0 0.2rem 0.65rem;
  color: var(--text-dim);
  font-size: 0.9rem;
}

.release-list {
  margin: 0.78rem 0 0;
  padding-left: 1rem;
  color: var(--text-dim);
}

.release-list li {
  margin-bottom: 0.32rem;
}

.release-details {
  margin: 0.85rem 0 0;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--bg-card-muted);
  padding: 0.15rem 0.65rem 0.55rem;
}

.release-details-summary {
  cursor: pointer;
  font: 600 0.82rem var(--ui-font);
  color: var(--accent);
  list-style-position: outside;
  padding: 0.35rem 0;
}

.release-full-list {
  margin: 0.35rem 0 0;
  padding-left: 1rem;
  max-height: 320px;
  overflow: auto;
  font-size: 0.82rem;
  color: var(--text-dim);
  line-height: 1.45;
}

.release-full-list li {
  margin-bottom: 0.28rem;
}

.release-full-list .rollup-more {
  list-style: none;
  margin-top: 0.35rem;
}

.release-tags {
  margin-top: 0.75rem;
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.release-tag {
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg-card-muted);
  color: var(--text-muted);
  padding: 0.2rem 0.52rem;
  font: 600 0.67rem var(--mono-font);
}

.release-links {
  margin-top: 0.72rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.release-links a {
  text-decoration: none;
  font: 600 0.79rem var(--ui-font);
  color: var(--accent);
}

.release-links a:hover {
  text-decoration: underline;
}

.empty-state {
  margin: 0 1rem 1rem;
  color: var(--text-muted);
  font: 500 0.9rem var(--ui-font);
}

.hidden {
  display: none !important;
}

@media (min-width: 768px) {
  .changelog-hero {
    padding: 2.4rem 1.5rem 2.5rem;
  }
}

@media (max-width: 980px) {
  .highlight-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .changelog-controls {
    grid-template-columns: 1fr;
  }

  .highlight-grid {
    grid-template-columns: 1fr;
  }

  .release-top {
    flex-direction: column;
  }
}