:root {
  --gc-eco-line: rgba(74, 222, 128, 0.35);
  --gc-nature-tint: rgba(120, 113, 108, 0.14);
  --gc-green-wash: rgba(163, 230, 53, 0.10);
  --gc-sustainable-edge: rgba(56, 189, 248, 0.28);
  --gc-organic-round: 20px;
}

.gc-shell {
  position: relative;
  z-index: 1;
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 24px 72px;
}

.gc-rail-layout {
  display: grid;
  grid-template-columns: 288px 1fr;
  gap: 40px;
  align-items: start;
}

.gc-eco-rail {
  position: sticky;
  top: 90px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.gc-rail-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--eco-leaf);
  border-radius: var(--gc-organic-round);
  padding: 24px 22px;
}

.gc-rail-kicker {
  display: block;
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--secondary);
  margin-bottom: 16px;
}

.gc-rail-nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.gc-rail-nav a {
  color: var(--muted);
  font-size: 14px;
  padding: 8px 10px;
  border-radius: 8px;
  border-left: 2px solid transparent;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}

.gc-rail-nav a:hover {
  color: var(--text);
  background: var(--gc-green-wash);
  border-left-color: var(--primary);
}

.gc-nature-panel {
  background: var(--gc-nature-tint);
  border: 1px solid var(--border);
  border-radius: var(--gc-organic-round);
  padding: 20px;
}

.gc-nature-panel strong {
  color: var(--secondary);
  font-size: 14px;
}

.gc-nature-panel p {
  color: var(--muted);
  font-size: 13px;
  margin-top: 8px;
}

.gc-content {
  min-width: 0;
}

.gc-head {
  border-bottom: 1px solid var(--border);
  padding-bottom: 28px;
  margin-bottom: 12px;
}

.gc-tag {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  background: rgba(244, 114, 182, 0.10);
  padding: 5px 12px;
  border-radius: 999px;
  margin-bottom: 16px;
}

.gc-head h1 {
  font-size: 2.3rem;
  color: var(--text);
  margin-bottom: 16px;
}

.gc-lede {
  color: var(--muted);
  font-size: 1.08rem;
  max-width: 720px;
}

.gc-block {
  padding: 28px 0;
  border-bottom: 1px solid var(--border);
}

.gc-block h2 {
  font-size: 1.5rem;
  color: var(--primary);
  margin-bottom: 14px;
}

.gc-block h3 {
  font-size: 1.12rem;
  color: var(--text);
  margin: 22px 0 10px;
}

.gc-block p {
  color: var(--muted);
  margin-bottom: 14px;
}

.gc-green-block {
  background: var(--gc-green-wash);
  border-radius: var(--gc-organic-round);
  border-bottom: none;
  padding: 28px 26px;
  margin: 8px 0;
}

.gc-sustainable-block {
  border: 1px solid var(--gc-sustainable-edge);
  border-radius: var(--gc-organic-round);
  border-bottom: 1px solid var(--gc-sustainable-edge);
  padding: 28px 26px;
  margin: 8px 0;
}

.gc-figure {
  margin: 22px 0 6px;
  max-width: 500px;
}

.gc-figure img {
  width: 100%;
  max-width: 500px;
  height: auto;
  border-radius: var(--gc-organic-round);
  border: 1px solid var(--border);
}

.gc-figure-right {
  margin-left: auto;
}

.gc-figure figcaption {
  font-size: 12px;
  color: var(--muted);
  margin-top: 8px;
  font-style: italic;
}

.gc-organic-cta {
  padding-top: 28px;
}

.gc-organic-cta a {
  display: inline-block;
  padding: 12px 26px;
  border-radius: 999px;
  border: 1px solid var(--gc-eco-line);
  color: var(--primary);
  font-weight: 600;
  transition: background 0.2s;
}

.gc-organic-cta a:hover {
  background: var(--gc-green-wash);
}

@media (max-width: 900px) {
  .gc-rail-layout {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .gc-eco-rail {
    position: static;
  }

  .gc-head h1 {
    font-size: 1.8rem;
  }
}