/* ============================================================
   certificates.css — Certificates Section
   3-column grid; images are grayscale and reveal color on hover.
============================================================ */

.certs-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}
@media (min-width: 40rem) { .certs-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 64rem) { .certs-grid { grid-template-columns: repeat(3, 1fr); } }

/* ── Card ───────────────────────────────────────────────────── */
.cert-card {
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: box-shadow 0.3s, transform 0.3s;
  cursor: default;
}
.cert-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.09);
}

/* ── Image ──────────────────────────────────────────────────── */
.cert-img-wrap { aspect-ratio: 7 / 5; overflow: hidden; background: var(--tint, var(--color-sand)); }
.cert-img-wrap img {
  width: 100%; height: 100%;
  object-fit: cover;
  filter: grayscale(0%);
  transition: filter 0.5s, transform 0.5s;
}
.cert-card:hover .cert-img-wrap img { transform: scale(1.04); }

/* ── Info strip ─────────────────────────────────────────────── */
.cert-info { padding: 1rem 1.1rem 1.25rem; }

.cert-issuer {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-muted);
  margin-bottom: 0.3rem;
}
.cert-title  { font-size: 0.95rem; font-weight: 600; color: var(--color-ink); line-height: 1.3; }
.cert-year   { font-family: var(--font-mono); font-size: 0.75rem; color: var(--color-muted); margin-top: 0.4rem; }