/* Patents page */

.patents-page main {
  padding-bottom: 0;
}

/* Hero */
.patents-hero {
  position: relative;
  overflow: hidden;
}

.patents-hero-bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(
      180deg,
      rgba(255, 255, 255, 0.72) 0%,
      rgba(248, 250, 252, 0.82) 55%,
      rgba(255, 255, 255, 0.9) 100%
    ),
    url("../images/patents/hero-bg.svg") center center / cover no-repeat;
  z-index: 0;
}

.patents-hero-inner {
  position: relative;
  z-index: 1;
  max-width: 920px;
}

.patents-hero-title {
  margin: 0 0 16px;
  font-size: clamp(2rem, 4.5vw, 3rem);
  font-weight: var(--font-weight-bold);
  line-height: 1.2;
  letter-spacing: -0.03em;
}

.patents-hero-lead {
  margin: 0;
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  line-height: 1.7;
}

/* Patents catalog */
.about-patents-full {
  padding: 56px 0 88px;
  background: linear-gradient(180deg, #f9fafb 0%, #ffffff 40%);
}

.about-patents-full__head {
  margin: 0 auto 32px;
  text-align: center;
}

.about-patents-full__head .section-title {
  margin: 0;
}

.patents-catalog-inner {
  max-width: 1200px;
  margin-inline: auto;
  padding: 28px 24px 32px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-default);
  background: #fff;
  box-shadow:
    0 1px 2px rgba(15, 23, 42, 0.04),
    0 12px 32px -20px rgba(15, 23, 42, 0.1);
}

.patents-catalog-note {
  margin: 32px 0 0;
  padding-top: 24px;
  border-top: 1px solid var(--color-border-subtle);
  text-align: center;
  font-size: var(--font-size-sm);
  line-height: 1.7;
  color: var(--text-muted);
}

.patent-tabs {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px;
  margin-bottom: 28px;
  padding: 6px;
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-pill);
  background: var(--color-surface-muted);
}

.patent-tab {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border: none;
  border-radius: var(--radius-pill);
  background: transparent;
  font-family: inherit;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--text-secondary);
  cursor: pointer;
  white-space: nowrap;
  transition:
    color var(--transition-fast),
    background var(--transition-fast),
    box-shadow var(--transition-fast);
}

.patent-tab:hover {
  color: var(--color-text-strong);
  background: rgba(255, 255, 255, 0.65);
}

.patent-tab.is-active {
  color: var(--color-text-strong);
  font-weight: var(--font-weight-semibold);
  background: #fff;
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.08);
}

.patent-tab__count {
  display: inline-block;
  min-width: 1.35em;
  padding: 2px 7px;
  font-size: 0.6875rem;
  font-variant-numeric: tabular-nums;
  font-weight: var(--font-weight-semibold);
  color: var(--text-muted);
  background: rgba(0, 0, 0, 0.05);
  border-radius: 999px;
}

.patent-tab.is-active .patent-tab__count {
  color: var(--color-text-strong);
  background: var(--color-surface-muted);
}

.patent-panels {
  padding-top: 8px;
}

.patent-panel {
  display: none;
}

.patent-panel.is-active {
  display: block;
  animation: patent-panel-in 0.28s var(--ease) both;
}

@keyframes patent-panel-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 720px) {
  .patents-catalog-inner {
    padding: 20px 16px 24px;
  }

  .patent-tabs {
    flex-wrap: nowrap;
    justify-content: flex-start;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    border-radius: var(--radius-lg);
  }

  .patent-tabs::-webkit-scrollbar {
    display: none;
  }

  .patent-tab {
    flex-shrink: 0;
    padding: 12px 14px;
    font-size: 0.8125rem;
  }
}

.patent-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px;
  align-items: stretch;
}

@media (max-width: 1200px) {
  .patent-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 900px) {
  .patent-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 520px) {
  .patent-grid {
    grid-template-columns: 1fr;
  }
}