/* ===== virtauto — UX Unify Layer (safe to add on top) ===================== */

/* Layout containers */
.va-container { max-width: 1120px; margin: 0 auto; padding: 0 20px; }
.section     { padding: 56px 0; }
.section--tight { padding: 32px 0; }

/* Headings & rhythm */
h1, h2, h3 { line-height: 1.25; margin-top: 0; }
h1 { margin-bottom: 20px; }
h2 { margin: 24px 0 16px; }
h3 { margin: 20px 0 12px; }

/* Images (global, safe) */
img { border: 0; display: block; }
.img-fluid { max-width: 100%; height: auto; }
.img-center { margin-left: auto; margin-right: auto; }
.img-max-900 { max-width: 900px; }
.img-shadow { box-shadow: 0 6px 24px rgba(0,0,0,.35); border-radius: 10px; }

/* Figure wrapper for consistent spacing + captions */
.va-figure { margin: 24px auto; text-align: center; }
.va-figure figcaption { margin-top: 10px; font-size: .95rem; opacity: .8; }

/* Grid helpers for cards/columns */
.grid      { display: grid; gap: 20px; }
.grid-2    { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3    { grid-template-columns: repeat(3, minmax(0, 1fr)); }
@media (max-width: 992px) { .grid-3 { grid-template-columns: 1fr; } .grid-2 { grid-template-columns: 1fr; } }

/* Cards (e.g., “LLM / RAG / Agent”) */
.va-card {
  background: rgba(255,255,255,.03);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 14px;
  padding: 18px 18px 16px;
  transition: transform .15s ease, border-color .15s ease, background .15s ease;
}
.va-card:hover { transform: translateY(-2px); border-color: rgba(255,255,255,.18); background: rgba(255,255,255,.04); }
.va-card h4 { margin: 0 0 8px; }

/* Navigation: active link highlight */
.nav a.active {
  background: rgba(64,160,255,.15);
  color: #cde6ff !important;
  border-radius: 8px;
}

/* Consistent section spacing around big posters/diagrams */
.poster { margin: 24px auto 16px; }
.poster img { max-width: 900px; }

/* Utilities */
.mt-0{margin-top:0!important}.mb-0{margin-bottom:0!important}.mt-16{margin-top:16px}.mb-16{margin-bottom:16px}
.pt-24{padding-top:24px}.pb-24{padding-bottom:24px}

/* Footer links a tad more visible on dark */
footer a { opacity: .9; }
footer a:hover { opacity: 1; }

/* Make buttons (CTAs) pop just a bit more */
.button, .btn, .cta {
  font-weight: 600;
  border-radius: 10px;
  padding: 10px 14px;
}