/* The Codex — link directory (CSV → data/knowledge-base.json) */

.app-main--codex {
  display: flex;
  flex-direction: column;
  min-height: 100dvh;
  padding-top: 0;
}

/* ── Top banner ─────────────────────────────────────── */

.codex-page__banner {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: clamp(148px, 25vh, 248px);
  flex-shrink: 0;
  overflow: hidden;
  background-color: var(--color-surface);
  background-image: url("../assets/site/thecodex.jpg");
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
}

.codex-page__banner::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background: linear-gradient(
    180deg,
    rgba(0, 0, 0, 0.2) 0%,
    rgba(0, 0, 0, 0.42) 42%,
    rgba(0, 0, 0, 0.38) 100%
  );
}

.codex-page__banner::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background: radial-gradient(
    ellipse 90% 80% at 50% 42%,
    transparent 28%,
    rgba(0, 0, 0, 0.22) 58%,
    rgba(0, 0, 0, 0.5) 100%
  );
}

.codex-page__banner-inner {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  width: 100%;
  max-width: min(100%, 920px);
  margin: 0 auto;
  padding: 0 var(--site-gutter, 24px);
  text-align: center;
  box-sizing: border-box;
}

.codex-page__headline {
  margin: 0;
  font-size: clamp(28px, 4.2vw, 42px);
  font-weight: 600;
  line-height: 1.12;
  letter-spacing: -0.03em;
  color: #fff;
  text-shadow:
    0 1px 2px rgba(0, 0, 0, 0.65),
    0 2px 12px rgba(0, 0, 0, 0.55),
    0 4px 24px rgba(0, 0, 0, 0.45);
}

.codex-page__subhead {
  margin: 0;
  max-width: 52em;
  font-size: clamp(12px, 1.35vw, 15px);
  font-weight: 500;
  line-height: 1.4;
  letter-spacing: -0.01em;
  color: #fff;
  text-shadow:
    0 1px 2px rgba(0, 0, 0, 0.6),
    0 2px 10px rgba(0, 0, 0, 0.5),
    0 3px 20px rgba(0, 0, 0, 0.45);
}

.codex-page__count {
  margin: 2px 0 0;
  font-size: clamp(11px, 1.2vw, 13px);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.92);
  text-shadow:
    0 1px 2px rgba(0, 0, 0, 0.65),
    0 2px 10px rgba(0, 0, 0, 0.5);
}

.codex-page__count:empty {
  display: none;
}

.codex-page__body {
  flex: 1;
  width: 100%;
  padding: 18px 0 48px;
  box-sizing: border-box;
}

.page--knowledge-base,
.page--codex {
  padding-top: 0;
  padding-bottom: 0;
}

.kb-center {
  width: min(100%, 920px);
  margin: 0 auto;
  padding: 0 clamp(16px, 3vw, 28px);
}

.kb-page__count {
  margin: 0 0 12px;
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text-muted);
  text-align: right;
  white-space: nowrap;
}

.kb-content {
  margin-top: 0;
}

.kb-loading,
.kb-empty {
  margin: 0;
  padding: 24px 0;
  font-size: 14px;
  color: var(--color-text-muted);
}

.kb-search-row {
  margin-bottom: 14px;
}

.kb-search {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
}

.kb-search__icon {
  display: flex;
  flex-shrink: 0;
  color: var(--color-text-muted);
}

.kb-search__icon svg {
  width: 18px;
  height: 18px;
}

.kb-search__input {
  flex: 1;
  min-width: 0;
  padding: 12px 0;
  border: none;
  background: transparent;
  color: var(--color-text);
  font: inherit;
  font-size: 15px;
}

.kb-search__input:focus {
  outline: none;
}

.kb-search:focus-within {
  border-color: color-mix(in srgb, var(--color-accent) 40%, var(--color-border));
}

.kb-area-browse {
  margin-bottom: 14px;
}

.kb-area-browse__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 12px;
  margin-bottom: 12px;
}

.kb-area-browse__title {
  margin: 0;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

.kb-browse-all {
  flex-shrink: 0;
  padding: 6px 14px;
  border: 1px solid var(--color-text);
  border-radius: 999px;
  background: var(--color-text);
  color: var(--color-bg);
  font: inherit;
  font-size: 12px;
  font-weight: 600;
  line-height: 1.2;
  white-space: nowrap;
  cursor: pointer;
  transition:
    border-color 0.15s ease,
    background 0.15s ease,
    color 0.15s ease,
    box-shadow 0.15s ease;
}

.kb-browse-all:hover {
  border-color: var(--color-text);
  background: color-mix(in srgb, var(--color-text) 88%, var(--color-bg));
  color: var(--color-bg);
  box-shadow: 0 4px 12px color-mix(in srgb, var(--color-text) 18%, transparent);
}

.kb-browse-all.is-active {
  border-color: var(--color-accent);
  background: var(--color-accent);
  color: var(--color-bg);
  box-shadow: 0 4px 12px color-mix(in srgb, var(--color-accent) 28%, transparent);
}

.kb-browse-all:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.kb-groups {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 6px;
}

.kb-groups--domains {
  margin-bottom: 4px;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 6px;
}

.kb-domain-subnav {
  margin-bottom: 16px;
}

.kb-domain-subnav__title {
  margin: 0 0 8px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--color-text-muted) 75%, var(--color-text));
}

.kb-domain-block {
  margin-bottom: 32px;
}

.kb-domain-block__title {
  margin: 0 0 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
  font-size: clamp(17px, 2vw, 20px);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

.kb-domain-block .kb-section {
  margin-bottom: 22px;
}

a.kb-area-card {
  text-decoration: none;
}

.kb-area-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  aspect-ratio: 1;
  margin: 0;
  padding: 10px 8px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md, 8px);
  background: color-mix(in srgb, var(--color-text) 3%, var(--color-surface));
  color: inherit;
  text-align: center;
  cursor: pointer;
  transition:
    border-color 0.15s ease,
    box-shadow 0.15s ease,
    background-color 0.15s ease;
}

.kb-area-card:hover {
  border-color: color-mix(in srgb, var(--color-accent) 45%, var(--color-border));
  box-shadow: 0 6px 18px color-mix(in srgb, var(--color-text) 8%, transparent);
}

.kb-area-card.is-active {
  border-color: var(--color-text);
  background: color-mix(in srgb, var(--color-text) 5%, var(--color-surface));
  box-shadow: 0 4px 14px color-mix(in srgb, var(--color-text) 10%, transparent);
}

.kb-area-card__icon {
  display: flex;
  flex-shrink: 0;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  color: inherit;
}

.kb-area-card__icon svg {
  width: 22px;
  height: 22px;
}

.kb-area-card__label {
  min-width: 0;
  max-width: 100%;
  padding: 0 2px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--color-text);
}

.kb-area-card:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.kb-topics {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 16px;
}

.kb-topics.is-collapsed {
  flex-wrap: nowrap;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.kb-topics.is-collapsed::-webkit-scrollbar {
  display: none;
}

.kb-topics__btn {
  padding: 6px 12px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-surface);
  color: var(--color-text);
  font: inherit;
  font-size: 12px;
  font-weight: 500;
  line-height: 1.2;
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
  cursor: pointer;
  transition:
    border-color 0.15s ease,
    background 0.15s ease,
    color 0.15s ease;
}

.kb-topics__btn:hover {
  border-color: color-mix(in srgb, var(--color-accent) 35%, var(--color-border));
}

.kb-topics__btn.is-active {
  border-color: var(--color-accent);
  background: color-mix(in srgb, var(--color-accent) 10%, var(--color-surface));
  color: var(--color-accent);
}

.kb-topics__btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.kb-topics__expand {
  flex-shrink: 0;
  align-self: center;
  padding: 6px 4px;
  border: 0;
  background: none;
  color: var(--color-accent);
  font: inherit;
  font-size: 12px;
  font-weight: 600;
  line-height: 1.2;
  white-space: nowrap;
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.kb-topics__expand:hover {
  color: color-mix(in srgb, var(--color-accent) 80%, var(--color-text));
}

.kb-topics__expand:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: 4px;
}

.kb-section {
  margin-bottom: 28px;
}

.kb-section__head {
  margin-bottom: 10px;
}

.kb-section__desc {
  display: none;
}

.kb-section__title {
  margin: 0;
  font-size: clamp(16px, 1.8vw, 18px);
  font-weight: 600;
  letter-spacing: -0.02em;
}

.kb-section__desc {
  margin: 4px 0 0;
  font-size: 13px;
  line-height: 1.45;
  color: var(--color-text-muted);
}

.kb-subsection {
  margin-bottom: 18px;
}

.kb-subsection:last-child {
  margin-bottom: 0;
}

.kb-subsection__title {
  margin: 0 0 10px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--color-text-muted);
}

.kb-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.kb-card {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  color: inherit;
  text-decoration: none;
  transition:
    border-color 0.15s ease,
    transform 0.15s ease,
    box-shadow 0.15s ease;
}

.kb-card:hover {
  border-color: color-mix(in srgb, var(--color-accent) 40%, var(--color-border));
  transform: translateY(-1px);
  box-shadow: 0 6px 18px color-mix(in srgb, var(--color-text) 8%, transparent);
}

.kb-card__title {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.35;
  color: var(--color-text);
}

.kb-card__desc {
  font-size: 12px;
  line-height: 1.45;
  color: var(--color-text-muted);
}

.kb-card__meta {
  margin-top: 2px;
  font-size: 11px;
  font-weight: 500;
  color: color-mix(in srgb, var(--color-accent) 80%, var(--color-text-muted));
}

@media (max-width: 720px) {
  .codex-page__banner {
    min-height: clamp(120px, 24vh, 188px);
  }

  .codex-page__banner-inner {
    gap: 8px;
    padding: 0 16px;
  }
}

@media (max-width: 900px) {
  .kb-groups--domains {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .kb-groups--domains {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .kb-groups {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .kb-area-card__label {
    font-size: 12px;
  }
}

@media (max-width: 720px) {
  .kb-grid {
    grid-template-columns: 1fr;
  }
}