.milestone-labels {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  margin-block: 24px;
  color: var(--text-orange);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.055em;
  line-height: 1.6;
  text-transform: uppercase;
}

.milestone-labels span {
  border-top: 2px solid currentColor;
  padding-top: 8px;
}

.milestone-description {
  font-size: 18px;
}

.milestone-availability {
  margin: 24px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

.milestone-tagline {
  font-size: clamp(22px, 3vw, 34px);
  font-weight: 600;
  letter-spacing: -0.035em;
  line-height: 1.2;
}

.artifact-status p {
  font-size: 15px;
  line-height: 1.6;
}

.artifact-status .artifact-status-note {
  border-top: 1px solid var(--line);
  margin: 24px 0 0;
  padding-top: 18px;
  color: var(--muted);
  font-size: 13px;
}

.technical-notes {
  border-block: 1px solid var(--line);
  margin-top: 12px;
}

.technical-notes summary {
  padding-block: 24px;
  font-size: 17px;
  font-weight: 600;
  cursor: pointer;
}

.technical-notes > div {
  padding-bottom: 20px;
}

.technical-notes h3 {
  font-size: 24px;
  letter-spacing: -0.025em;
}

.technical-notes p {
  color: #3a3a3c;
  font-size: 16px;
  line-height: 1.6;
}

.evolution-section,
.upcoming-section {
  padding-block: clamp(72px, 9vw, 120px);
  border-bottom: 1px solid var(--line);
}

.upcoming-section {
  background: var(--soft);
}

.evolution-section h2,
.upcoming-section h2 {
  margin: 16px 0 24px;
  max-width: 820px;
  font-size: clamp(34px, 4.7vw, 60px);
  line-height: 1.06;
  letter-spacing: -0.045em;
}

.section-intro {
  max-width: 760px;
  margin-bottom: 48px;
  color: var(--muted);
  font-size: 19px;
  line-height: 1.5;
}

.model-timeline,
.upcoming-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 32px;
}

.model-timeline {
  list-style: none;
  padding: 0;
  margin: 0;
}

.model-timeline li {
  position: relative;
  border-top: 2px solid var(--line);
  padding: 24px 12px 0 0;
}

.model-timeline li + li::before {
  content: "→";
  position: absolute;
  left: -25px;
  top: 63px;
  color: var(--muted);
}

.model-timeline .current-milestone {
  border-color: var(--text-orange);
}

.timeline-step,
.project-category,
.project-label {
  font-size: 11px;
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: 0.045em;
  text-transform: uppercase;
  color: var(--muted);
}

.model-timeline h3,
.upcoming-card h3 {
  margin: 16px 0;
  font-size: 26px;
  line-height: 1.1;
  letter-spacing: -0.035em;
}

.model-timeline li > p:not(.timeline-step) {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.65;
}

.upcoming-card {
  display: flex;
  min-width: 0;
  flex-direction: column;
  padding: 30px;
  background: #fff;
  border: 1px solid var(--line);
}

.upcoming-card > p:not(.project-category):not(.project-label) {
  color: #3a3a3c;
  font-size: 15px;
  line-height: 1.65;
}

.upcoming-card .project-subtitle {
  font-weight: 600;
}

.upcoming-card .project-label {
  padding-top: 24px;
  margin: auto 0 0;
  color: var(--text-orange);
}

@media (max-width: 980px) {
  .upcoming-grid {
    grid-template-columns: 1fr;
    gap: 18px;
  }
}

@media (max-width: 720px) {
  .model-timeline {
    grid-template-columns: 1fr;
    gap: 46px;
  }
  .model-timeline li + li::before {
    content: "↓";
    left: 0;
    top: -33px;
  }
  .upcoming-card {
    padding: 26px;
  }
}