:root {
  --kb-navy: #151515;
  --kb-navy-soft: #24201e;
  --kb-orange: #ff6b2b;
  --kb-orange-dark: #d94e12;
  --kb-cream: #fff9f5;
  --kb-border: #e7e1dc;
}

html {
  scroll-behavior: smooth;
}

body {
  background: #f8fafc;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
}

.nav-links a[aria-current="page"] {
  color: var(--kb-orange-dark);
}

.knowledge-hero {
  position: relative;
  overflow: hidden;
  padding: 72px 0 58px;
  color: #fff;
  background:
    radial-gradient(circle at 88% 8%, rgba(255, 107, 43, .42), transparent 23rem),
    linear-gradient(135deg, var(--kb-navy) 0%, var(--kb-navy-soft) 100%);
}

.knowledge-hero::after {
  content: "";
  position: absolute;
  width: 420px;
  height: 420px;
  right: -190px;
  bottom: -280px;
  border: 70px solid rgba(255, 255, 255, .05);
  border-radius: 50%;
  pointer-events: none;
}

.knowledge-hero .breadcrumb,
.knowledge-hero .breadcrumb a,
.knowledge-hero h1,
.knowledge-hero .hero-copy {
  color: #fff;
}

.knowledge-hero .breadcrumb {
  color: rgba(255, 255, 255, .68);
}

.knowledge-hero .eyebrow {
  background: rgba(255, 107, 43, .16);
  border: 1px solid rgba(255, 139, 86, .28);
  color: #ffb08b;
}

.knowledge-hero h1 {
  max-width: 940px;
  font-size: clamp(2.5rem, 6vw, 4.6rem);
}

.knowledge-hero .hero-copy {
  max-width: 760px;
  color: rgba(255, 255, 255, .76);
}

.knowledge-search {
  display: flex;
  max-width: 820px;
  margin-top: 34px;
  padding: 7px;
  border: 1px solid rgba(255, 255, 255, .2);
  border-radius: 18px;
  background: #fff;
  box-shadow: 0 24px 60px rgba(0, 0, 0, .24);
}

.knowledge-search label {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.knowledge-search input {
  min-width: 0;
  flex: 1;
  padding: 15px 18px;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--kb-navy);
  font: 700 1rem/1.3 'Nunito Sans', sans-serif;
}

.knowledge-search input::placeholder {
  color: #8b8f97;
}

.knowledge-search button {
  min-width: 112px;
  padding: 12px 20px;
  border: 0;
  border-radius: 12px;
  background: var(--kb-orange);
  color: #fff;
  font: 800 .95rem/1 'Nunito Sans', sans-serif;
  cursor: pointer;
}

.knowledge-search button:hover {
  background: var(--kb-orange-dark);
}

.search-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  min-height: 28px;
  margin-top: 14px;
  color: rgba(255, 255, 255, .72);
  font-size: .92rem;
}

.search-clear {
  border: 0;
  background: transparent;
  color: #ffb08b;
  font: inherit;
  font-weight: 800;
  text-decoration: underline;
  cursor: pointer;
}

.search-clear[hidden] {
  display: none;
}

.knowledge-hero .quick-paths {
  margin-top: 26px;
}

.knowledge-hero .quick-paths a {
  border-color: rgba(255, 255, 255, .18);
  background: rgba(255, 255, 255, .08);
  color: #fff;
}

.knowledge-hero .quick-paths a:hover {
  border-color: rgba(255, 107, 43, .8);
  background: rgba(255, 107, 43, .14);
  color: #fff;
}

.knowledge-summary {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 26px 0 4px;
}

.summary-pill {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 9px 13px;
  border: 1px solid var(--kb-border);
  border-radius: 999px;
  background: #fff;
  color: #5c6068;
  font-size: .88rem;
  font-weight: 700;
}

.summary-pill strong {
  color: var(--kb-navy);
}

.clusters {
  gap: 20px;
  padding-top: 24px;
}

.cluster {
  padding: 28px;
  border-color: var(--kb-border);
  box-shadow: 0 14px 34px rgba(35, 28, 24, .06);
  scroll-margin-top: 96px;
}

.cluster h2 {
  display: flex;
  align-items: center;
  gap: 10px;
}

.cluster h2::before {
  content: "";
  width: 11px;
  height: 11px;
  flex: 0 0 11px;
  border-radius: 4px;
  background: var(--kb-orange);
  box-shadow: 0 0 0 6px rgba(255, 107, 43, .11);
}

.cluster.featured h2::before {
  background: #ff8b56;
  box-shadow: 0 0 0 6px rgba(255, 139, 86, .16);
}

.cluster-count {
  display: inline-flex;
  margin: 0 0 18px 21px;
  padding: 3px 9px;
  border-radius: 999px;
  background: var(--kb-cream);
  color: var(--kb-orange-dark);
  font-size: .78rem;
  font-weight: 800;
}

.cluster.featured .cluster-count {
  background: rgba(255, 255, 255, .1);
  color: #ffb08b;
}

.cluster-intro {
  margin-bottom: 16px;
}

.resource-link {
  align-items: center;
  min-height: 51px;
  background: rgba(255, 255, 255, .72);
}

.resource-link::after {
  flex: 0 0 auto;
  content: '→';
}

.resource-list li[hidden],
.cluster[hidden],
.no-results[hidden] {
  display: none;
}

.no-results {
  margin: 8px 0 64px;
  padding: 42px;
  border: 1px dashed #d7cec8;
  border-radius: 22px;
  background: #fff;
  text-align: center;
}

.no-results h2 {
  margin-bottom: 8px;
}

.no-results button {
  margin-top: 18px;
  padding: 12px 18px;
  border: 0;
  border-radius: 10px;
  background: var(--kb-navy);
  color: #fff;
  font: 800 .95rem/1 'Nunito Sans', sans-serif;
  cursor: pointer;
}

:focus-visible {
  outline: 3px solid rgba(255, 107, 43, .48);
  outline-offset: 3px;
}

@media (max-width: 800px) {
  .knowledge-hero {
    padding: 52px 0 44px;
  }

  .knowledge-search {
    border-radius: 14px;
  }

  .knowledge-search button {
    min-width: auto;
    padding-inline: 16px;
  }

  .knowledge-summary {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .summary-pill:last-child {
    grid-column: 1 / -1;
  }
}

@media (max-width: 520px) {
  .shell {
    width: min(100% - 28px, 1180px);
  }

  .knowledge-search {
    display: grid;
  }

  .knowledge-search button {
    min-height: 46px;
  }

  .knowledge-summary {
    grid-template-columns: 1fr;
  }

  .summary-pill:last-child {
    grid-column: auto;
  }

  .cluster,
  .no-results {
    padding: 24px 20px;
  }
}