/* Sphinx RTD tweaks and doc UI for ARCADE */

.wy-nav-content {
  max-width: 960px;
}

/* Pipeline stage strip */
.arcade-pipeline {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: stretch;
  margin: 1.25rem 0 1.75rem;
  padding: 0;
  list-style: none;
}

.arcade-pipeline li {
  flex: 1 1 7.5rem;
  min-width: 7rem;
  margin: 0;
  padding: 0.85rem 0.75rem;
  border-radius: 6px;
  background: #f4f7fb;
  border: 1px solid #d0d7e2;
  border-left: 4px solid #2980b9;
  box-shadow: none;
}

.arcade-pipeline li strong {
  display: block;
  font-size: 0.85rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: #1a5276;
  margin-bottom: 0.35rem;
}

.arcade-pipeline li span {
  display: block;
  font-size: 0.92rem;
  line-height: 1.35;
  color: #2c3e50;
}

.arcade-pipeline li.optional {
  border-left-color: #7f8c8d;
  background: #f8f9fa;
}

.arcade-pipeline li.optional strong {
  color: #566573;
}

/* Method family cards */
.arcade-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.85rem;
  margin: 1.25rem 0 1.75rem;
}

.arcade-card {
  margin: 0;
  padding: 1rem 1.05rem;
  border-radius: 6px;
  border: 1px solid #d0d7e2;
  background: #fff;
}

.arcade-card h4 {
  margin: 0 0 0.45rem;
  font-size: 1.02rem;
  color: #1a5276;
}

.arcade-card p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.45;
  color: #34495e;
}

.arcade-card.classical { border-top: 3px solid #27ae60; }
.arcade-card.neural { border-top: 3px solid #8e44ad; }
.arcade-card.hybrid { border-top: 3px solid #e67e22; }
.arcade-card.ensemble { border-top: 3px solid #2980b9; }

/* Pitfalls / checklist callouts */
.arcade-pitfall,
.arcade-checklist {
  margin: 1.25rem 0;
  padding: 0.9rem 1.1rem;
  border-radius: 6px;
  border: 1px solid #e0c36a;
  background: #fffbeb;
}

.arcade-checklist {
  border-color: #a9c7df;
  background: #f0f7fc;
}

.arcade-pitfall p:first-child,
.arcade-checklist p:first-child {
  margin-top: 0;
}

.arcade-pitfall p:last-child,
.arcade-checklist p:last-child {
  margin-bottom: 0;
}

/* Tutorial mission banner */
.arcade-mission {
  margin: 1.25rem 0 1.75rem;
  padding: 1rem 1.2rem;
  border-radius: 6px;
  background: linear-gradient(135deg, #eaf2f8 0%, #f7fbff 100%);
  border: 1px solid #b8cfe0;
}

.arcade-mission strong {
  color: #1a5276;
}

/* Mermaid diagrams: give breathing room */
.mermaid {
  margin: 1.25rem 0 1.75rem;
  text-align: center;
}