.eco-shell {
  padding-bottom: 4rem;
  background:
    radial-gradient(circle at 10% 0%, rgba(0, 212, 255, 0.12), transparent 30%),
    radial-gradient(circle at 95% 20%, rgba(255, 107, 53, 0.12), transparent 24%),
    linear-gradient(180deg, #070b1f 0%, #0a0e27 48%, #090e26 100%);
}

.eco-hero {
  padding: 4rem 0 2rem;
  border-bottom: 1px solid var(--border-color);
}

.kicker {
  font-size: 0.9rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--secondary-color);
}

.eco-hero h1 {
  text-align: left;
  font-size: clamp(2.2rem, 4vw, 3.6rem);
  margin-bottom: 0.7rem;
}

.lead {
  max-width: 760px;
  font-size: 1.1rem;
}

.hero-meta {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  flex-wrap: wrap;
}

.muted {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.eco-layout {
  padding: 2rem 0;
}

.eco-grid {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  gap: 1.3rem;
  align-items: start;
}

.eco-sidebar,
.eco-card,
.tree-card,
.calc-card,
.roadmap-item {
  border: 1px solid var(--border-color);
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(17, 27, 61, 0.95), rgba(9, 15, 38, 0.98));
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.25);
}

.eco-sidebar {
  padding: 1.1rem;
  position: sticky;
  top: 105px;
}

.filter-buttons {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.5rem;
  margin: 1rem 0;
}

.filter-btn {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-primary);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 10px;
  padding: 0.6rem 0.8rem;
  cursor: pointer;
  text-align: left;
}

.filter-btn.active,
.filter-btn:hover {
  border-color: var(--secondary-color);
  background: rgba(0, 212, 255, 0.12);
}

.tree-card {
  padding: 1rem;
}

.tree-list,
.tree-list ul {
  list-style: none;
  padding-left: 0;
  margin: 0;
}

.tree-list > li {
  margin-top: 0.8rem;
}

.tree-list ul {
  margin-top: 0.35rem;
  padding-left: 0.8rem;
  border-left: 2px solid rgba(255, 255, 255, 0.1);
}

.tree-list li li {
  margin: 0.35rem 0;
}

.tool-cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.eco-card {
  padding: 1rem;
}

.status-chip {
  display: inline-block;
  border-radius: 999px;
  padding: 0.3rem 0.7rem;
  background: rgba(245, 158, 11, 0.2);
  color: #fde68a;
  border: 1px solid rgba(245, 158, 11, 0.35);
  font-size: 0.85rem;
  font-weight: 600;
}

.calc-area {
  margin-top: 1.2rem;
}

.calc-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.calc-card {
  padding: 1rem;
}

.calc-result {
  margin-top: 0.8rem;
  padding: 0.7rem;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
}

.roadmap {
  margin-top: 1.2rem;
}

.roadmap-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.8rem;
}

.roadmap-item {
  padding: 0.9rem;
}

.eco-card.hidden {
  display: none;
}

@media (max-width: 1080px) {
  .eco-grid {
    grid-template-columns: 1fr;
  }

  .eco-sidebar {
    position: static;
  }
}

@media (max-width: 780px) {
  .tool-cards,
  .calc-grid,
  .roadmap-grid {
    grid-template-columns: 1fr;
  }
}