/* ============================================================
   70-blog-index — card grid for /blog/. Scoped under
   .sec-70-blog-index. Reuses tokens/typography only, no new
   design system.
   ============================================================ */

.sec-70-blog-index__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(1.25rem, 1rem + 1vw, 2rem);
}

@media (max-width: 980px) {
  .sec-70-blog-index__grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .sec-70-blog-index__grid { grid-template-columns: 1fr; }
}

.sec-70-blog-index__card {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: clamp(1.5rem, 1.2rem + 1vw, 2rem);
  background: var(--white);
  border: 1px solid var(--line-bone);
  border-radius: var(--radius-card);
  text-decoration: none;
  color: inherit;
  overflow: hidden;
  transition: transform 260ms var(--ease-out), box-shadow 260ms var(--ease-out), border-color 260ms var(--ease-out);
}

.sec-70-blog-index__thumb {
  margin: calc(-1 * clamp(1.5rem, 1.2rem + 1vw, 2rem)) calc(-1 * clamp(1.5rem, 1.2rem + 1vw, 2rem)) 0.25rem;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--bone-2);
}
.sec-70-blog-index__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: grayscale(0.2) contrast(1.02);
  transition: transform 500ms var(--ease-out), filter 400ms var(--ease-out);
}
.sec-70-blog-index__card:hover .sec-70-blog-index__thumb img,
.sec-70-blog-index__card:focus-visible .sec-70-blog-index__thumb img {
  transform: scale(1.06);
  filter: grayscale(0) contrast(1);
}
.sec-70-blog-index__card:hover,
.sec-70-blog-index__card:focus-visible {
  transform: translateY(-4px);
  border-color: var(--accent);
  box-shadow: 0 20px 40px -24px hsl(var(--accent-h) 40% 20% / 0.35);
}

.sec-70-blog-index__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-h4);
  line-height: 1.25;
  color: var(--text-on-bone);
}

.sec-70-blog-index__excerpt {
  font-size: var(--fs-small);
  color: var(--text-on-bone-dim);
  line-height: 1.55;
}

.sec-70-blog-index__more {
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 600;
  font-size: var(--fs-small);
  color: var(--accent);
}