.legacy-article {
  --legacy-copper: #ca7b47;
  --legacy-blue: #4e8eae;
  --legacy-paper: #d7bd8a;
}

.legacy-article .article-hero-copy {
  background:
    radial-gradient(circle at 87% 12%, color-mix(in srgb, var(--legacy-copper) 17%, transparent), transparent 34%),
    linear-gradient(145deg, color-mix(in srgb, var(--legacy-blue) 9%, transparent), transparent 52%),
    color-mix(in srgb, var(--surface-solid) 87%, transparent);
}

.legacy-article .article-label,
.legacy-article .article-kicker {
  color: var(--legacy-copper) !important;
}

.legacy-article .article-label span {
  background: var(--legacy-copper);
  box-shadow: 0 0 12px color-mix(in srgb, var(--legacy-copper) 70%, transparent);
}

.legacy-opening {
  border-color: color-mix(in srgb, var(--legacy-copper) 30%, transparent) !important;
  background:
    radial-gradient(circle at 100% 0, color-mix(in srgb, var(--legacy-blue) 12%, transparent), transparent 36%),
    color-mix(in srgb, var(--surface-solid) 86%, transparent);
}

.legacy-opening > div {
  color: var(--legacy-copper);
}

.legend-chain {
  display: grid;
  max-width: 900px;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 11px;
  margin: 32px 0;
}

.legend-chain article {
  position: relative;
  min-height: 205px;
  padding: 21px;
  border: 1px solid color-mix(in srgb, var(--legacy-copper) 22%, var(--line));
  border-radius: 15px;
  background:
    linear-gradient(145deg, color-mix(in srgb, var(--legacy-copper) 7%, transparent), transparent 58%),
    color-mix(in srgb, var(--surface-solid) 74%, transparent);
}

.legend-chain article:not(:last-child)::after {
  position: absolute;
  top: 31px;
  right: -17px;
  z-index: 2;
  color: var(--legacy-copper);
  font-family: var(--font-mono);
  content: "→";
}

.legend-chain b {
  display: block;
  color: color-mix(in srgb, var(--legacy-copper) 74%, var(--text));
  font-family: var(--font-mono);
  font-size: 1.2rem;
}

.legend-chain span {
  display: block;
  margin-top: 25px;
  color: var(--text);
  font-size: 0.76rem;
  font-weight: 700;
}

.legend-chain p {
  margin: 8px 0 0;
  color: var(--muted-strong);
  font-size: 0.67rem;
  line-height: 1.58;
}

.legacy-table th {
  background: color-mix(in srgb, var(--legacy-blue) 10%, transparent);
  color: color-mix(in srgb, var(--legacy-blue) 72%, var(--text));
}

.legacy-equation {
  display: flex;
  max-width: 900px;
  flex-wrap: wrap;
  align-items: center;
  gap: 9px;
  margin: 30px 0;
  padding: 23px;
  border: 1px solid color-mix(in srgb, var(--legacy-copper) 28%, var(--line));
  border-radius: 15px;
  background: color-mix(in srgb, var(--legacy-copper) 6%, transparent);
}

.legacy-equation span,
.legacy-equation strong {
  padding: 9px 11px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg-deep);
  font-family: var(--font-mono);
  font-size: 0.61rem;
}

.legacy-equation strong {
  color: var(--legacy-copper);
}

.legacy-equation b {
  color: var(--muted);
  font-family: var(--font-mono);
}

.legacy-code {
  border-color: color-mix(in srgb, var(--legacy-copper) 27%, var(--line));
}

.legacy-code > div {
  color: var(--legacy-copper);
}

.legacy-loop {
  display: grid;
  max-width: 850px;
  gap: 0;
  margin: 32px 0;
}

.legacy-loop article {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 24px;
  padding: 0 0 30px;
}

.legacy-loop time {
  position: relative;
  color: var(--legacy-copper);
  font-family: var(--font-mono);
  font-size: 0.78rem;
}

.legacy-loop time::after {
  position: absolute;
  top: 7px;
  right: -15px;
  width: 9px;
  height: 9px;
  border: 2px solid var(--bg);
  border-radius: 50%;
  background: var(--legacy-copper);
  box-shadow: 0 0 12px color-mix(in srgb, var(--legacy-copper) 55%, transparent);
  content: "";
}

.legacy-loop article:not(:last-child) time::before {
  position: absolute;
  top: 8px;
  right: -11px;
  bottom: -30px;
  width: 1px;
  background: var(--line-strong);
  content: "";
}

.legacy-loop span {
  color: var(--legacy-blue);
  font-family: var(--font-mono);
  font-size: 0.5rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.legacy-loop h3 {
  margin: 7px 0 8px;
  font-size: clamp(1rem, 2.7vw, 1.4rem);
}

.legacy-loop p {
  margin: 0;
  color: var(--muted-strong);
  font-size: 0.73rem;
  line-height: 1.65;
}

.ghost-guide {
  display: grid;
  max-width: 900px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 32px 0;
}

.ghost-guide article {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 15px;
  background:
    linear-gradient(145deg, color-mix(in srgb, var(--legacy-blue) 6%, transparent), transparent 60%),
    color-mix(in srgb, var(--surface-solid) 73%, transparent);
}

.ghost-guide i {
  color: var(--legacy-blue);
  font-size: 1.2rem;
}

.ghost-guide h3 {
  margin: 18px 0 8px;
  font-size: 0.86rem;
}

.ghost-guide p {
  margin: 0;
  color: var(--muted-strong);
  font-size: 0.71rem;
  line-height: 1.62;
}

@media (max-width: 900px) {
  .legend-chain {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .legend-chain article::after {
    display: none;
  }
}

@media (max-width: 620px) {
  .legend-chain,
  .ghost-guide {
    grid-template-columns: 1fr;
  }

  .legacy-loop article {
    grid-template-columns: 64px minmax(0, 1fr);
    gap: 20px;
  }
}