/* Patents guide — sits on top of news.css */

.patent-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
  margin: 0 0 1.5rem;
}
.patent-stats div {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1rem 1.1rem;
  box-shadow: var(--shadow-sm);
}
.patent-stats strong {
  display: block;
  font-size: 1.65rem;
  letter-spacing: -0.03em;
  color: var(--text);
}
.patent-stats span {
  color: var(--muted);
  font-size: 0.82rem;
}

.pfilters-block {
  margin: 0 0 1.25rem;
}
.pfilters-label {
  margin: 0.85rem 0 0.4rem;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--muted);
}
.pfilters-label:first-child {
  margin-top: 0;
}
.pfilters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: 0;
}
.pcount {
  margin: 0 0 1rem;
  font-size: 0.85rem;
  color: var(--muted);
}
.pfilter {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-secondary);
  border-radius: 999px;
  padding: 0.35rem 0.8rem;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
}
.pfilter.is-on,
.pfilter:hover {
  background: var(--accent-soft);
  border-color: #bae6fd;
  color: var(--accent-hover);
}

.pgrid {
  display: grid;
  gap: 1rem;
}
@media (min-width: 720px) {
  .pgrid {
    grid-template-columns: 1fr 1fr;
  }
}

.pcard[hidden] {
  display: none !important;
}
.pcard {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 1.2rem 1.25rem 1.3rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
  text-decoration: none !important;
  color: inherit;
  box-shadow: var(--shadow-sm);
  min-height: 12.5rem;
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}
.pcard:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: #bae6fd;
}
.pcard-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}
.pcard-cat,
.pcard-geo {
  align-self: flex-start;
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 700;
  padding: 0.18rem 0.5rem;
  border-radius: 999px;
}
.pcard-cat {
  color: var(--mint);
  background: var(--mint-soft);
}
.pcard-geo {
  color: var(--accent-hover);
  background: var(--accent-soft);
}
.pcard time {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--muted);
}
.pcard code {
  width: fit-content;
  font-size: 0.75rem;
}
.pcard h2 {
  font-size: 1.12rem;
  line-height: 1.3;
  margin: 0.2rem 0 0.15rem;
  letter-spacing: -0.02em;
}
.pcard p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.5;
  flex: 1;
}

.patent-figure {
  margin: 0 0 1.5rem;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: #0b1220;
}
.patent-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 28rem;
  object-fit: contain;
  background: #0b1220;
}
.patent-figure figcaption {
  padding: 0.55rem 0.85rem 0.7rem;
  font-size: 0.78rem;
  color: var(--muted);
  background: var(--surface);
}
.patent-figure--placeholder {
  min-height: 11rem;
  display: grid;
  place-items: center;
  background:
    radial-gradient(circle at 20% 20%, rgba(14, 165, 233, 0.25), transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(13, 148, 136, 0.2), transparent 50%),
    #071019;
  color: #9ad4ea;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: 0.8rem;
}

.patent-back {
  margin: -0.75rem 0 1.35rem;
}
.patent-back .btn {
  font-size: 0.85rem;
  padding: 0.4rem 0.9rem;
}

.patent-pager {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin: 2rem 0 0;
  font-size: 0.9rem;
}
.patent-pager a {
  font-weight: 600;
}

.patent-body h2 {
  font-size: 1.2rem;
}

@media (max-width: 640px) {
  .patent-stats {
    grid-template-columns: 1fr;
  }
}