/* ═══════════════════════════════════════════════════════════════════════════
   CHANGELOG — Timeline + Version cards + Tags
   ═══════════════════════════════════════════════════════════════════════════ */

.changelog-section {
  padding: 4rem 0 6rem;
}

/* ─── Timeline ─── */
.changelog-timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  padding-left: 2rem;
}

.changelog-timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--purple), transparent);
}

/* ─── Version Card ─── */
.changelog-version {
  position: relative;
  margin-bottom: 3rem;
  padding-left: 2rem;
}

.changelog-version::before {
  content: '';
  position: absolute;
  left: -2rem;
  top: 8px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--purple);
  border: 3px solid var(--bg-primary);
  box-shadow: 0 0 0 2px var(--purple), 0 0 15px rgba(139, 92, 246, 0.4);
}

.changelog-version--latest::before {
  background: #ec4899;
  box-shadow: 0 0 0 2px #ec4899, 0 0 20px rgba(236, 72, 153, 0.5);
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0%, 100% { box-shadow: 0 0 0 2px #ec4899, 0 0 20px rgba(236, 72, 153, 0.5); }
  50% { box-shadow: 0 0 0 4px #ec4899, 0 0 30px rgba(236, 72, 153, 0.7); }
}

.changelog-version__header {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 0.75rem;
}

.changelog-version__number {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  background: var(--gradient-purple);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.changelog-version__date {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary, #94a3b8);
  padding: 0.2rem 0.6rem;
  background: rgba(139, 92, 246, 0.08);
  border-radius: 4px;
  border: 1px solid rgba(139, 92, 246, 0.15);
}

.changelog-version__title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

/* ─── Change List ─── */
.changelog-list {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.changelog-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.6rem 0.8rem;
  background: rgba(139, 92, 246, 0.04);
  border-radius: 8px;
  border: 1px solid rgba(139, 92, 246, 0.06);
  transition: background 0.2s;
}

.changelog-item:hover {
  background: rgba(139, 92, 246, 0.08);
}

/* ─── Tags ─── */
.changelog-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  white-space: nowrap;
  flex-shrink: 0;
}

.changelog-tag--feature {
  color: #8b5cf6;
  background: rgba(139, 92, 246, 0.12);
  border: 1px solid rgba(139, 92, 246, 0.25);
}

.changelog-tag--enhancement {
  color: #06b6d4;
  background: rgba(6, 182, 212, 0.12);
  border: 1px solid rgba(6, 182, 212, 0.25);
}

.changelog-tag--fix {
  color: #22c55e;
  background: rgba(34, 197, 94, 0.12);
  border: 1px solid rgba(34, 197, 94, 0.25);
}

.changelog-tag--breaking {
  color: #ef4444;
  background: rgba(239, 68, 68, 0.12);
  border: 1px solid rgba(239, 68, 68, 0.25);
}

.changelog-item__text {
  font-size: 0.9rem;
  color: var(--text-secondary, #94a3b8);
  line-height: 1.5;
}

/* ─── Responsive ─── */
@media (max-width: 640px) {
  .changelog-timeline {
    padding-left: 1.5rem;
  }
  .changelog-version {
    padding-left: 1.5rem;
  }
  .changelog-version::before {
    left: -1.5rem;
  }
  .changelog-version__number {
    font-size: 1.2rem;
  }
}