@keyframes panel-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ═══ PAGE INTRO ═══ */
.page-intro {
  padding: 2.5rem 0 1rem;
  animation: fade-in 0.5s ease-out;
}

.page-label {
  font-size: 0.7rem;
  letter-spacing: 0.5em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 0.75rem;
  display: block;
}

.page-heading {
  font-family: 'Playfair Display', serif;
  font-weight: 900;
  font-size: clamp(1.6rem, 4vw, 2.6rem);
  color: var(--text-bright);
  line-height: 1.15;
  margin-bottom: 0.75rem;
}

.page-sub {
  font-size: 0.88rem;
  color: var(--text-dim);
  line-height: 1.75;
  max-width: 560px;
}

/* ═══ PRINCIPLES BOARD ═══ */
.principles-section {
  animation: fade-in 0.5s ease-out;
  margin-left: -48px;
  margin-right: -48px;
}

.principle-radio {
  position: fixed;
  opacity: 0;
  width: 0;
  height: 0;
  pointer-events: none;
}

/* ─── CARD GRID ─── */
.principles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 20px;
}

.principle-card {
  display: flex;
  flex-direction: column;
  cursor: pointer;
  transition: transform 0.15s;
  user-select: none;
}

.principle-card:hover {
  transform: translateY(-2px);
}

.card-top, .card-bottom {
  color: var(--gold);
  white-space: pre;
  overflow: hidden;
  font-size: 0.85rem;
  transition: color 0.15s;
}

.card-row {
  display: flex;
  font-size: 0.85rem;
  flex: 1;
}

.card-border {
  color: var(--gold);
  flex-shrink: 0;
  font-size: 0;
  width: 0.85rem;
  border-left: 1px solid var(--gold);
  transition: border-color 0.15s;
}

.card-border:last-child {
  border-left: none;
  border-right: 1px solid var(--gold);
}

.card-content {
  flex: 1;
  min-width: 0;
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
}

.card-title {
  font-family: 'Playfair Display', serif;
  font-weight: 700;
  color: var(--crimson);
  font-size: 0.95rem;
  margin-bottom: 6px;
  display: block;
}

.card-desc {
  color: var(--text);
  font-size: 0.8rem;
  line-height: 1.6;
  flex: 1;
}

.card-icon {
  color: var(--crimson);
  font-size: 0.65rem;
  line-height: 1.15;
  white-space: pre;
  display: block;
  margin-bottom: 8px;
  text-align: center;
  transition: color 0.15s;
}

/* ─── Active card states ─── */
#p1:checked ~ .principles-grid .principle-card-1 .card-top,
#p2:checked ~ .principles-grid .principle-card-2 .card-top,
#p3:checked ~ .principles-grid .principle-card-3 .card-top,
#p4:checked ~ .principles-grid .principle-card-4 .card-top,
#p5:checked ~ .principles-grid .principle-card-5 .card-top,
#p6:checked ~ .principles-grid .principle-card-6 .card-top,
#p1:checked ~ .principles-grid .principle-card-1 .card-bottom,
#p2:checked ~ .principles-grid .principle-card-2 .card-bottom,
#p3:checked ~ .principles-grid .principle-card-3 .card-bottom,
#p4:checked ~ .principles-grid .principle-card-4 .card-bottom,
#p5:checked ~ .principles-grid .principle-card-5 .card-bottom,
#p6:checked ~ .principles-grid .principle-card-6 .card-bottom,
#p1:checked ~ .principles-grid .principle-card-1 .card-border,
#p2:checked ~ .principles-grid .principle-card-2 .card-border,
#p3:checked ~ .principles-grid .principle-card-3 .card-border,
#p4:checked ~ .principles-grid .principle-card-4 .card-border,
#p5:checked ~ .principles-grid .principle-card-5 .card-border,
#p6:checked ~ .principles-grid .principle-card-6 .card-border {
  border-color: var(--crimson);
}

#p1:checked ~ .principles-grid .principle-card-1 .card-icon,
#p2:checked ~ .principles-grid .principle-card-2 .card-icon,
#p3:checked ~ .principles-grid .principle-card-3 .card-icon,
#p4:checked ~ .principles-grid .principle-card-4 .card-icon,
#p5:checked ~ .principles-grid .principle-card-5 .card-icon,
#p6:checked ~ .principles-grid .principle-card-6 .card-icon {
  color: var(--gold);
}

/* ─── DETAIL PANELS ─── */
.detail-container {
  overflow: hidden;
  display: flex;
  justify-content: center;
}

.detail-panel {
  display: none;
  background: var(--bg-raised);
  border: 1px solid var(--gold-dim);
  border-left: 4px solid var(--crimson);
  padding: 32px 36px;
  max-width: 760px;
  width: 100%;
  animation: panel-in 0.28s ease-out;
}

.detail-body {
  font-size: 0.85rem;
  color: var(--text);
  line-height: 1.85;
}

#p1:checked ~ .detail-container .detail-p1,
#p2:checked ~ .detail-container .detail-p2,
#p3:checked ~ .detail-container .detail-p3,
#p4:checked ~ .detail-container .detail-p4,
#p5:checked ~ .detail-container .detail-p5,
#p6:checked ~ .detail-container .detail-p6 {
  display: block;
}

.detail-eyebrow {
  font-size: 0.62rem;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--crimson);
  margin-bottom: 0.6rem;
  display: block;
}

.detail-title {
  font-family: 'Playfair Display', serif;
  font-weight: 700;
  font-size: clamp(1.2rem, 3vw, 1.55rem);
  color: var(--text-bright);
  line-height: 1.2;
  margin-bottom: 1.25rem;
}

.detail-body p {
  margin-bottom: 1rem;
}

.detail-body p:last-child {
  margin-bottom: 0;
}

.detail-pullquote {
  border-left: 2px solid var(--gold);
  padding: 0.75rem 1.25rem;
  margin: 1.25rem 0;
  font-family: 'Playfair Display', serif;
  font-style: italic;
  font-size: 0.95rem;
  color: var(--text-dim);
  line-height: 1.55;
  background: rgba(197, 151, 62, 0.05);
}

/* ═══ RESPONSIVE ═══ */
@media (max-width: 700px) {
  .principles-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .detail-panel {
    padding: 22px 20px;
  }
}

@media (max-width: 560px) {
  .principles-grid {
    grid-template-columns: 1fr;
  }

  .detail-panel {
    padding: 18px 16px;
  }
}