/* ══════════════════════════════════════════════
   Principles Section
   ══════════════════════════════════════════════ */

.principles-section {
  position: relative;
  z-index: 10;
  background: var(--bg);
  padding: 100px 24px 100px;
  max-width: 100vw;
  overflow: hidden;
}

.principles-inner {
  max-width: 960px;
  margin: 0 auto;
}

.principles-header {
  text-align: center;
  margin-bottom: 48px;
}

.principles-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.principle-card {
  background: rgba(255, 255, 255, 0.015);
  border: 1px solid rgba(255, 255, 255, 0.04);
  border-radius: 10px;
  padding: 20px 16px 18px;
  text-align: center;
  opacity: 0;
  transform: translateY(20px);
  transition: border-color 0.3s ease;
}

.principle-card.visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.5s ease, transform 0.5s ease, border-color 0.3s ease;
}

.principle-card:nth-child(1).visible { transition-delay: 0s; }
.principle-card:nth-child(2).visible { transition-delay: 0.08s; }
.principle-card:nth-child(3).visible { transition-delay: 0.16s; }
.principle-card:nth-child(4).visible { transition-delay: 0.24s; }

.principle-card:hover {
  border-color: rgba(255, 107, 53, 0.15);
}

.principle-canvas-wrap {
  width: 100%;
  aspect-ratio: 4 / 3;
  margin-bottom: 14px;
  border-radius: 6px;
  overflow: hidden;
  background: rgba(0, 0, 0, 0.2);
}

.principle-canvas-wrap canvas {
  display: block;
  width: 100%;
  height: 100%;
}

.principle-card h3 {
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 8px;
}

.principle-card p {
  font-size: 0.72rem;
  font-weight: 300;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.5);
}

/* ── Responsive ── */
@media (max-width: 900px) {
  .principles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .principles-section { padding: 60px 16px 70px; }
  .principles-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }
}