/* ---------- SEO guide: rule cards grid ---------- */
.seo-rule-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-top: 16px;
}
.seo-rule-card {
  background: var(--white);
  border-radius: 10px;
  padding: 16px 18px;
  border-left: 4px solid var(--felt);
}
.seo-rule-card h4 {
  margin: 0 0 6px;
  font-size: 0.98rem;
  color: var(--felt);
}
.seo-rule-card p { margin: 0; font-size: 0.9rem; }

/* ---------- SEO guide: static board-setup diagram ---------- */
.seo-board-mock {
  background: var(--felt);
  border: 3px solid var(--felt-deep);
  border-radius: 14px;
  padding: 20px;
  margin: 18px 0;
  box-shadow: inset 0 0 20px rgba(0,0,0,0.35);
}
.seo-board-toprow {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 18px;
  margin-bottom: 20px;
}
.seo-cellgroup-wrap { position: relative; padding-top: 20px; }
.seo-cellgroup-label {
  position: absolute;
  top: -2px;
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: rgba(255,255,255,0.6);
  font-weight: 700;
}
.seo-cellgroup { display: flex; gap: 8px; }
.seo-slot {
  width: 48px;
  height: 68px;
  border: 2px dashed rgba(255,255,255,0.25);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.15);
  color: rgba(255,255,255,0.25);
  font-size: 0.9rem;
  font-weight: 700;
}
.seo-tableau-label {
  display: block;
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: rgba(255,255,255,0.6);
  font-weight: 700;
  margin-bottom: 8px;
}
.seo-tableau-mock {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
.seo-tableau-mock .seo-slot { flex: 1; min-width: 34px; }

/* ---------- SEO guide: supermove formula + table ---------- */
.seo-formula-box {
  background: var(--felt-deep);
  color: var(--cream);
  border: 1px dashed var(--gold);
  padding: 16px;
  border-radius: 10px;
  text-align: center;
  font-size: 1.02rem;
  margin: 14px 0;
}
.seo-formula-box strong { color: var(--gold); }
.seo-table-wrap { overflow-x: auto; margin-top: 12px; }
.seo-table { width: 100%; border-collapse: collapse; text-align: left; font-size: 0.9rem; }
.seo-table th {
  padding: 10px;
  border-bottom: 2px solid var(--felt);
  color: var(--felt);
  font-family: var(--font-display);
  font-weight: 600;
}
.seo-table td { padding: 10px; border-bottom: 1px solid rgba(0,0,0,0.08); }
.seo-table td.seo-good { color: #1a7a3d; font-weight: 700; }
.seo-table td.seo-bad { color: var(--red); font-weight: 700; }

/* ---------- SEO guide: step-by-step visual move examples ---------- */
/* Deliberately NOT named .card/.column/.slot — those are the real game's
   own classes (board.js, cards.css) and reusing them here would make these
   decorative mockups inherit real gameplay positioning/sizing rules. */
.seo-example-board {
  background: var(--felt);
  border: 3px solid var(--felt-deep);
  border-radius: 14px;
  padding: 18px;
  margin: 14px 0;
}
.seo-mini-cols { display: flex; gap: 10px; min-height: 150px; }
.seo-mini-column { position: relative; width: 56px; }
.seo-mini-card {
  width: 56px;
  height: 78px;
  background: var(--cream);
  border-radius: 6px;
  box-shadow: 0 3px 6px rgba(0,0,0,0.3);
  padding: 4px;
  font-weight: 700;
  font-size: 0.8rem;
  position: absolute;
  left: 0;
  border: 1.5px solid rgba(0,0,0,0.15);
}
.seo-mini-card.seo-red { color: var(--red); }
.seo-mini-card.seo-black { color: var(--ink); }
.seo-mini-card-suit { text-align: center; font-size: 1.1rem; margin-top: 8px; }
.seo-mini-empty-col {
  border: 2px dashed var(--gold);
  border-radius: 6px;
  background: rgba(201,162,39,0.08);
  height: 78px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--gold);
  font-size: 0.68rem;
  font-weight: 700;
  padding: 6px;
}
.seo-highlight-dest { outline: 3px solid var(--gold); box-shadow: 0 0 12px var(--gold); }
.seo-highlight-src { outline: 3px solid #4FC3E0; box-shadow: 0 0 12px #4FC3E0; }

.seo-move-stage {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}
.seo-move-stage-second { margin-top: 28px; }
.seo-move-arrow {
  color: var(--gold);
  font-size: 1.8rem;
  line-height: 1;
  flex-shrink: 0;
}
.seo-move-caption {
  text-align: center;
  color: var(--cream);
  opacity: 0.85;
  font-size: 0.82rem;
  margin: 10px 0 0;
}
.seo-mini-foundation {
  border: 2px solid var(--gold);
  border-radius: 6px;
  background: rgba(201,162,39,0.12);
  height: 78px;
  width: 70px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--gold);
  font-size: 0.68rem;
  font-weight: 700;
  padding: 6px;
}

.seo-step-box {
  background: var(--white);
  border: 1px solid rgba(0,0,0,0.1);
  border-radius: 10px;
  padding: 14px 16px;
  margin-top: 14px;
  font-size: 0.92rem;
}
.seo-step-box strong { color: var(--felt); }
.seo-step-box ol { margin: 6px 0 0 20px; }
.seo-step-box li { margin-bottom: 4px; color: var(--ink-soft); }

/* ---------- SEO guide: beginner tip cards ---------- */
.seo-tip-card {
  background: var(--white);
  border-radius: 10px;
  padding: 16px 18px;
  margin-bottom: 12px;
  border-left: 4px solid var(--gold);
}
.seo-tip-card h4 { margin: 0 0 6px; font-size: 0.98rem; color: var(--felt); }
.seo-tip-card p { margin: 0; font-size: 0.9rem; }

@media (max-width: 600px) {
  .seo-rule-grid { grid-template-columns: 1fr; }
  .seo-slot { width: 38px; height: 54px; font-size: 0.75rem; }
  .seo-mini-card { width: 44px; height: 62px; font-size: 0.68rem; }
  .seo-mini-column { width: 44px; }
}