.timeline-section,
.ledger-section,
.protocol-section {
  width: min(var(--container), calc(100% - 36px));
  margin: 0 auto 34px;
  padding: clamp(30px, 5vw, 56px) 0;
}

.section-copy {
  max-width: 780px;
  margin-bottom: 22px;
}

.section-copy h2 {
  margin: 5px 0 10px;
  font-size: clamp(34px, 6vw, 72px);
  line-height: 0.98;
  letter-spacing: 0;
}

.section-copy p {
  color: #d0ded9;
  font-size: 18px;
}

.timeline {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 10px;
}

.century-grid {
  display: grid;
  grid-template-columns: repeat(25, minmax(8px, 1fr));
  gap: 4px;
  margin-bottom: 14px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(5, 10, 13, 0.74);
}

.century-cell {
  min-height: 20px;
  border: 1px solid rgba(244, 251, 248, 0.08);
  border-radius: 3px;
  background: var(--cell-color, rgba(66, 232, 255, 0.42));
}

.century-cell--high {
  --cell-color: rgba(121, 242, 141, 0.86);
}

.century-cell--mid {
  --cell-color: rgba(66, 232, 255, 0.74);
}

.century-cell--warn {
  --cell-color: rgba(255, 211, 106, 0.72);
}

.century-cell--low {
  --cell-color: rgba(255, 95, 126, 0.72);
}

.timeline-node {
  position: relative;
  min-height: 210px;
  padding: 14px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(5, 10, 13, 0.74);
}

.timeline-node::before {
  position: absolute;
  inset: 0 auto 0 0;
  width: 4px;
  content: "";
  background: var(--node-color, var(--cyan));
}

.timeline-node--tone-0 {
  --node-color: var(--cyan);
}

.timeline-node--tone-1 {
  --node-color: var(--green);
}

.timeline-node--tone-2 {
  --node-color: var(--amber);
}

.timeline-node--tone-3 {
  --node-color: var(--rose);
}

.timeline-node--tone-4 {
  --node-color: #b8d7ff;
}

.timeline-node--tone-5 {
  --node-color: var(--white);
}

.timeline-node time {
  color: var(--node-color, var(--cyan));
  font-family: var(--mono);
  font-size: 22px;
  font-weight: 900;
}

.timeline-node h3 {
  margin: 12px 0 8px;
  font-size: 18px;
  line-height: 1.08;
}

.timeline-node p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 14px;
}

.ledger-grid,
.rule-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 12px;
}

.ledger-receipt {
  display: grid;
  gap: 10px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel-strong);
}

.ledger-receipt div {
  display: grid;
  gap: 4px;
}

.rule-grid {
  grid-template-columns: repeat(4, 1fr);
}

.rule-grid article {
  min-height: 245px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(9, 17, 22, 0.76);
}

.rule-grid span {
  color: var(--amber);
  font-family: var(--mono);
  font-weight: 900;
}

.rule-grid h3 {
  margin: 36px 0 10px;
  font-size: 22px;
  line-height: 1.05;
}

.rule-grid p {
  margin-bottom: 0;
  color: var(--muted);
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 24px clamp(18px, 4vw, 44px);
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

.site-footer span:first-child {
  color: var(--white);
  font-weight: 900;
}