/* Hubs — capability browse + format documentation */

.kv-hub__hero {
  margin-bottom: var(--kv-space-6);
  padding-bottom: var(--kv-space-5);
  border-bottom: 1px solid color-mix(in srgb, var(--kv-color-border) 80%, transparent);
}

.kv-hub__hero h1 {
  margin-top: var(--kv-space-3);
  font-size: clamp(1.75rem, 3.5vw, 2.35rem);
  font-weight: var(--kv-fw-semibold);
  letter-spacing: -0.035em;
  line-height: 1.15;
}

.kv-hub__lede {
  margin: var(--kv-space-3) 0 0;
  max-width: 42rem;
  font-size: var(--kv-fs-md);
  line-height: 1.55;
  color: var(--kv-color-text-muted);
}

.kv-hub__hero .kv-trust {
  margin-top: var(--kv-space-5);
}

.kv-hub__hero .kv-trust__item {
  font-size: var(--kv-fs-xs);
  color: var(--kv-color-text-muted);
}

.kv-hub__body {
  display: grid;
  gap: 0;
  max-width: 52rem;
}

.kv-hub--browse .kv-hub__body {
  max-width: none;
}

.kv-hub__body > .kv-section {
  margin-block: 0;
  padding-block: clamp(1.5rem, 3vw, 2.25rem);
  border-top: 1px solid color-mix(in srgb, var(--kv-color-border) 75%, transparent);
}

.kv-hub__body > .kv-section:first-child,
.kv-hub__body > .kv-hub-split:first-child {
  border-top: 0;
  padding-top: 0;
}

.kv-hub__body > .kv-hub-split {
  padding-block: clamp(1.5rem, 3vw, 2.25rem);
  border-top: 1px solid color-mix(in srgb, var(--kv-color-border) 75%, transparent);
}

.kv-hub__body > .kv-section.kv-level-2 {
  padding: clamp(1.5rem, 3vw, 2.25rem) 0;
  border: 0;
  border-top: 1px solid color-mix(in srgb, var(--kv-color-border) 75%, transparent);
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

.kv-hub__body > .kv-section.kv-level-2:first-child {
  border-top: 0;
  padding-top: 0;
}

.kv-hub__body > .kv-section.kv-level-2 .kv-section__title {
  font-size: clamp(1.15rem, 2.2vw, 1.35rem);
  font-weight: var(--kv-fw-semibold);
  color: var(--kv-color-text);
  letter-spacing: -0.02em;
  margin-bottom: var(--kv-space-2);
}

.kv-hub__body > .kv-section.kv-level-3 .kv-section__title {
  font-size: clamp(1.05rem, 2vw, 1.2rem);
  font-weight: var(--kv-fw-semibold);
  color: var(--kv-color-text);
}

.kv-hub__body > .kv-section.kv-level-4 .kv-section__title {
  font-size: var(--kv-fs-md);
  font-weight: var(--kv-fw-medium);
  color: var(--kv-color-text-muted);
  letter-spacing: 0;
}

.kv-hub-section__header {
  margin-bottom: var(--kv-space-4);
}

.kv-hub-section__header .kv-section__lede {
  margin: var(--kv-space-1) 0 0;
  font-size: var(--kv-fs-sm);
  color: var(--kv-color-text-muted);
  max-width: 40rem;
}

.kv-hub-prose {
  max-width: 42rem;
}

.kv-hub-overview p {
  margin: 0 0 var(--kv-space-2);
  color: var(--kv-color-text-muted);
  font-size: var(--kv-fs-sm);
  line-height: 1.55;
  max-width: 58ch;
}

.kv-hub-prose__block {
  margin-top: var(--kv-space-4);
}

.kv-hub-prose__heading {
  margin: 0 0 var(--kv-space-2);
  font-size: var(--kv-fs-sm);
  font-weight: var(--kv-fw-semibold);
  color: var(--kv-color-text);
}

.kv-hub-prose__block p {
  margin: 0 0 var(--kv-space-2);
}

.kv-hub-prose__block p:last-child {
  margin-bottom: 0;
}

.kv-hub-prose p,
.kv-hub-bullets {
  margin: 0;
  color: var(--kv-color-text-muted);
  font-size: var(--kv-fs-sm);
  line-height: 1.6;
}

.kv-hub-bullets {
  padding-left: 1.15rem;
  display: grid;
  gap: var(--kv-space-2);
}

.kv-hub-bullets li::marker {
  color: var(--kv-color-border-strong);
}

.kv-hub-split {
  display: grid;
  gap: var(--kv-space-6);
}

.kv-hub-split > .kv-section {
  margin: 0;
  padding: 0;
  border: 0;
}

@media (min-width: 720px) {
  .kv-hub-split {
    grid-template-columns: 1fr 1fr;
    gap: var(--kv-space-8);
  }
}

/* Specs — format hubs */
.kv-hub-specs-section .kv-section__title {
  margin-bottom: var(--kv-space-4);
}

.kv-hub-specs {
  display: grid;
  gap: 0;
  margin: 0;
  border: 1px solid var(--kv-color-border);
  border-radius: var(--kv-radius-lg);
  background: var(--kv-color-surface-elevated);
  overflow: hidden;
  box-shadow: var(--kv-shadow-sm);
}

.kv-hub-specs > div {
  display: grid;
  gap: var(--kv-space-1);
  padding: var(--kv-space-4) var(--kv-space-5);
}

.kv-hub-specs > div + div {
  border-top: 1px solid var(--kv-color-border);
}

.kv-hub-specs dt {
  margin: 0;
  font-size: var(--kv-fs-xs);
  font-weight: var(--kv-fw-semibold);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--kv-color-text-muted);
}

.kv-hub-specs dd {
  margin: 0;
  font-size: var(--kv-fs-sm);
  font-weight: var(--kv-fw-medium);
  color: var(--kv-color-text);
  line-height: 1.45;
}

@media (min-width: 640px) {
  .kv-hub-specs > div {
    grid-template-columns: minmax(10rem, 13rem) minmax(0, 1fr);
    gap: var(--kv-space-4);
    align-items: baseline;
  }
}

.kv-hub-cards {
  gap: var(--kv-space-3);
}

.kv-hub-cards .kv-home-card {
  min-height: 6rem;
  box-shadow: var(--kv-shadow-sm);
}

.kv-hub-cards .kv-card__title {
  font-size: var(--kv-fs-lg);
}

.kv-hub-cards .kv-card__body {
  font-size: var(--kv-fs-sm);
}

.kv-hub__body .kv-level-2 .kv-link-list,
.kv-hub__body .kv-level-3 .kv-link-list {
  box-shadow: none;
}

.kv-hub__body .kv-level-4 .kv-link-list {
  border-color: color-mix(in srgb, var(--kv-color-border) 80%, transparent);
  background: transparent;
}

.kv-hub__body .kv-level-4 .kv-link-row__title {
  font-size: var(--kv-fs-sm);
  color: var(--kv-color-text-muted);
}

/* Capability index — category grid */
.kv-hub-category-grid {
  display: grid;
  gap: var(--kv-space-3);
  grid-template-columns: 1fr;
}

@media (min-width: 560px) {
  .kv-hub-category-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .kv-hub-category-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.kv-hub-category-card {
  display: flex;
  align-items: center;
  gap: var(--kv-space-3);
  min-height: 4.5rem;
  padding: var(--kv-space-4);
  border: 1px solid var(--kv-color-border);
  border-radius: var(--kv-radius-lg);
  background: var(--kv-color-surface-elevated);
  color: inherit;
  text-decoration: none;
  transition: border-color var(--kv-duration) var(--kv-ease);
}

.kv-hub-category-card:hover {
  border-color: var(--kv-color-border-strong);
}

.kv-hub-category-card__icon {
  display: grid;
  place-items: center;
  width: 2.75rem;
  height: 2.75rem;
  flex-shrink: 0;
  border-radius: var(--kv-radius-md);
  background: color-mix(in srgb, var(--kv-color-accent-soft) 50%, var(--kv-color-surface-elevated));
  color: var(--kv-color-accent);
}

.kv-hub-category-card__body {
  display: grid;
  gap: 0.15rem;
  min-width: 0;
}

.kv-hub-category-card__title {
  font-size: var(--kv-fs-md);
  font-weight: var(--kv-fw-semibold);
  color: var(--kv-color-text);
  line-height: 1.25;
}

.kv-hub-category-card__meta {
  font-size: var(--kv-fs-sm);
  color: var(--kv-color-text-muted);
}

.kv-hub-details {
  margin-block: clamp(1.25rem, 2.5vw, 2rem);
  padding-block: clamp(1rem, 2vw, 1.5rem);
  border-top: 1px solid color-mix(in srgb, var(--kv-color-border) 75%, transparent);
}

.kv-hub-details__summary {
  cursor: pointer;
  list-style: none;
  font-size: var(--kv-fs-sm);
  font-weight: var(--kv-fw-semibold);
  color: var(--kv-color-text-muted);
}

.kv-hub-details__summary::-webkit-details-marker {
  display: none;
}

.kv-hub-details__summary::after {
  content: " +";
  color: var(--kv-color-accent);
}

.kv-hub-details[open] > .kv-hub-details__summary::after {
  content: " −";
}

.kv-hub-details__body {
  display: grid;
  gap: 0;
  padding-top: var(--kv-space-4);
}

.kv-hub-details__body > .kv-section,
.kv-hub-details__body > .kv-hub-split {
  margin-block: 0;
  padding-block: var(--kv-space-4);
  border-top: 1px solid color-mix(in srgb, var(--kv-color-border) 70%, transparent);
}

.kv-hub-details__body > .kv-section:first-child,
.kv-hub-details__body > .kv-hub-split:first-child {
  border-top: 0;
  padding-top: 0;
}
  display: grid;
  gap: var(--kv-space-2);
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

@media (min-width: 640px) {
  .kv-hub-tool-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 960px) {
  .kv-hub-tool-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.kv-hub-tool-card {
  display: flex;
  align-items: center;
  min-height: 3.25rem;
  padding: var(--kv-space-3) var(--kv-space-4);
  border: 1px solid var(--kv-color-border);
  border-radius: var(--kv-radius-md);
  background: var(--kv-color-surface-elevated);
  color: inherit;
  text-decoration: none;
  transition: border-color var(--kv-duration) var(--kv-ease);
}

.kv-hub-tool-card:hover {
  border-color: var(--kv-color-border-strong);
}

.kv-hub-tool-card__title {
  font-size: var(--kv-fs-sm);
  font-weight: var(--kv-fw-semibold);
  line-height: 1.3;
  color: var(--kv-color-text);
}

/* Format hubs — shortcut chips */
.kv-hub-shortcuts {
  display: flex;
  flex-wrap: wrap;
  gap: var(--kv-space-2);
}

.kv-hub-shortcut {
  display: inline-flex;
  align-items: center;
  min-height: 2.5rem;
  padding: 0.4rem 0.9rem;
  border: 1px solid color-mix(in srgb, var(--kv-color-border) 90%, transparent);
  border-radius: var(--kv-radius-md);
  background: color-mix(in srgb, var(--kv-color-surface-elevated) 85%, transparent);
  color: inherit;
  text-decoration: none;
  transition: border-color var(--kv-duration) var(--kv-ease);
}

.kv-hub-shortcut:hover {
  border-color: var(--kv-color-border-strong);
}

.kv-hub-shortcut__label {
  font-size: var(--kv-fs-sm);
  font-weight: var(--kv-fw-medium);
  color: var(--kv-color-text-muted);
}

/* Guides / knowledge — secondary rails */
.kv-hub-support .kv-section__title {
  color: var(--kv-color-text-muted);
}

.kv-hub-rail__header {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--kv-space-3);
}

.kv-hub-rail__all {
  font-size: var(--kv-fs-sm);
  font-weight: var(--kv-fw-semibold);
  color: var(--kv-color-accent);
  text-decoration: none;
}

.kv-hub-rail__all:hover {
  text-decoration: underline;
}

.kv-hub-rail {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(14rem, 17rem);
  gap: var(--kv-space-3);
  overflow-x: auto;
  padding-bottom: var(--kv-space-2);
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}

.kv-hub-rail__card {
  display: grid;
  gap: var(--kv-space-2);
  align-content: start;
  min-height: 6.5rem;
  padding: var(--kv-space-4);
  border: 1px solid color-mix(in srgb, var(--kv-color-border) 85%, transparent);
  border-radius: var(--kv-radius-md);
  background: color-mix(in srgb, var(--kv-color-surface-elevated) 80%, transparent);
  color: inherit;
  text-decoration: none;
  scroll-snap-align: start;
}

.kv-hub-rail__card:hover {
  border-color: var(--kv-color-border-strong);
}

.kv-hub-rail__card-title {
  font-size: var(--kv-fs-sm);
  font-weight: var(--kv-fw-semibold);
  line-height: 1.35;
  color: var(--kv-color-text);
}

.kv-hub-rail__card-meta {
  font-size: var(--kv-fs-xs);
  line-height: 1.4;
  color: var(--kv-color-text-muted);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Format docs — secondary after tools */
.kv-hub--format .kv-hub-docs .kv-section__title,
.kv-hub--format .kv-hub-overview .kv-section__title,
.kv-hub--format .kv-hub-specs-section .kv-section__title {
  font-size: var(--kv-fs-md);
  font-weight: var(--kv-fw-medium);
  color: var(--kv-color-text-muted);
}

.kv-hub--format .kv-hub-specs {
  box-shadow: none;
  background: color-mix(in srgb, var(--kv-color-surface-elevated) 75%, transparent);
}

.kv-hub--format .kv-hub-category-card__meta {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}