/* ---------- generic card grids ---------- */
.cardgrid {
  display: grid;
  gap: 16px;
  margin: 18px 0 6px;
}
.cardgrid.cols-2 {
  grid-template-columns: repeat(2, 1fr);
}
.cardgrid.cols-3 {
  grid-template-columns: repeat(3, 1fr);
}
.card {
  border: 1px solid var(--rule);
  border-radius: 8px;
  background: var(--card);
  padding: 20px;
  transition:
    border-color 0.18s ease,
    transform 0.18s ease,
    background 0.18s ease;
}
.card:hover {
  border-color: color-mix(in srgb, var(--accent) 45%, var(--rule));
  transform: translateY(-2px);
}
.card .ct {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 19px;
  margin: 0 0 6px;
  line-height: 1.25;
}
.card .ct .ix {
  color: var(--accent);
}
.card p {
  margin: 0;
  font-size: 15.5px;
  color: var(--dim);
  line-height: 1.5;
}

/* contribution cards carry a small accent eyebrow */
.card .eb {
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  display: block;
  margin-bottom: 8px;
}

/* ---------- dataset cards ---------- */
.dataset .ct {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 1px solid var(--rule);
  padding-bottom: 10px;
  margin-bottom: 12px;
}

/* saliency comparison (labelled strips by model and cutoff) */
.saliency-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin: 14px 0;
}
.saliency-grid figure {
  margin: 0;
  border: 1px solid var(--rule);
  border-radius: 8px;
  background: var(--card);
  overflow: hidden;
}
.saliency-grid .sh {
  font-family: var(--sans);
  font-size: 12.5px;
  font-weight: 600;
  color: var(--ink);
  background: var(--accent-soft);
  padding: 8px 12px;
  border-bottom: 1px solid var(--rule);
}
.saliency-grid img {
  display: block;
  width: 100%;
  height: auto;
  padding: 12px;
  background: #fff;
}
.conclusion .num {
  flex: none;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-family: var(--serif);
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ---------- limitations / future work ---------- */
.twocol {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin: 16px 0 6px;
}
.lcard {
  border: 1px solid var(--rule);
  border-radius: 8px;
  background: var(--card);
  padding: 18px 20px;
}
.lcard.future {
  border-left: 3px solid var(--accent);
}
.lcard.limits {
  border-left: 3px solid var(--ink);
}
.lcard h4 {
  font-family: var(--sans);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--dim);
  margin: 0 0 10px;
}
.lcard ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
.lcard li {
  display: grid;
  grid-template-columns: 18px 1fr;
  gap: 10px;
  padding: 8px 0;
  border-top: 1px solid var(--rule);
  font-family: var(--sans);
  font-size: 13.5px;
  color: var(--dim);
  line-height: 1.5;
}
.lcard li::before {
  font-weight: 700;
}
.lcard.future li::before {
  content: "\2192";
  color: var(--accent);
}
.lcard.limits li::before {
  content: "\2715";
  color: var(--dim);
}

/* ---------- responsive ---------- */
@media (max-width: 720px) {
  .methodgrid,
  .pairgrid {
    grid-template-columns: 1fr;
  }
  .pairgrid figure {
    position: static;
  }
}
@media (max-width: 600px) {
  .cardgrid.cols-2,
  .cardgrid.cols-3,
  .drift-types,
  .conclusions,
  .twocol,
  .saliency-grid {
    grid-template-columns: 1fr;
  }
}