/* ==========================================================================
   blog.css — Resources hub (Blog / Guides / Use Cases)
   Loaded only on /blog/, /guides/, /use-cases/ listing + detail pages.
   Reuses tokens and components from the core system; adds only genuinely
   new patterns: content-type tabs, filter bar, article prose, pagination.
   ========================================================================== */

/* ══ RESOURCES-HUB LOCAL TOKENS ═════════════════════════════════════════
   Verified against the live home.css: WerqLabs is genuinely flat/sharp
   (radius 0 everywhere, no shadow at rest) — cards like .insight-card
   only pick up --shadow-md + a border-color shift on hover. This file
   follows that pattern exactly rather than inventing rounded corners. */
:root {
  --hub-gradient-brand: linear-gradient(135deg, var(--color-brand) 0%, var(--color-brand-700) 100%);
  --hub-gradient-hero: radial-gradient(circle at 15% 20%, rgba(50, 98, 174, 0.14), transparent 55%),
                        radial-gradient(circle at 85% 0%, rgba(224, 162, 78, 0.12), transparent 45%);
  --header-height-scrolled: 68px;
}

/* ══ CONTENT-TYPE TABS ═════════════════════════════════════════════════ */
.res-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  border-bottom: 1px solid var(--color-line);
}

.res-tabs__link {
  padding: var(--space-sm) var(--space-md);
  font-family: var(--font-display);
  font-size: var(--fs-sm);
  color: var(--color-ink-soft);
  border-bottom: 2px solid transparent;
  margin-block-end: -1px;
  transition: color var(--dur-fast) var(--ease-standard), border-color var(--dur-fast) var(--ease-standard);
}

.res-tabs__link:hover { color: var(--color-ink); }

.res-tabs__link[aria-current="page"] {
  color: var(--color-brand);
  border-block-end-color: var(--color-brand);
}

/* ══ FILTER BAR ═════════════════════════════════════════════════════════ */
.res-filters {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: var(--space-md);
  padding: var(--space-lg);
  margin-block-end: var(--space-xl);
  background: var(--color-surface-alt);
  border: 1px solid var(--color-line-soft);
}

.res-filters__field {
  display: flex;
  flex-direction: column;
  gap: var(--space-3xs);
  min-inline-size: 12rem;
  flex: 1 1 12rem;
}

.res-filters__field label {
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  color: var(--color-muted);
}

.res-filters__actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-inline-start: auto;
}

.res-filters__toggle {
  display: none;
  align-items: center;
  gap: var(--space-2xs);
  padding: 0.6rem 1rem;
  border: 1px solid var(--color-line-soft);
  background: var(--color-surface);
  font-family: var(--font-sans);
  font-size: var(--fs-sm);
  color: var(--color-ink);
}

.res-filters__count {
  color: var(--color-muted);
  font-size: var(--fs-sm);
}

/* ══ RESULTS META ═══════════════════════════════════════════════════════ */
.res-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-sm);
  margin-block-end: var(--space-lg);
  color: var(--color-muted);
  font-size: var(--fs-sm);
}

/* ══ CARD GRID ══════════════════════════════════════════════════════════ */
.res-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

@media (max-width: 62rem) {
  .res-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 40rem) {
  .res-grid { grid-template-columns: 1fr; }
}

.res-card { text-decoration: none; }

.res-card__media {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--color-surface-sunken);
  margin-block-end: var(--space-sm);
}

.res-card__media img {
  inline-size: 100%;
  block-size: 100%;
  object-fit: cover;
}

.res-card__badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2xs);
  margin-block-end: var(--space-2xs);
}

.res-card__meta {
  display: flex;
  align-items: center;
  gap: var(--space-2xs);
  margin-block-start: auto;
  padding-block-start: var(--space-sm);
  font-size: var(--fs-xs);
  color: var(--color-muted);
}

/* ══ EMPTY STATE ════════════════════════════════════════════════════════ */
.res-empty {
  padding: var(--space-2xl);
  text-align: center;
  border: 1px dashed var(--color-line);
  color: var(--color-muted);
}

/* ══ PAGINATION ═════════════════════════════════════════════════════════ */
.res-pagination {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: var(--space-2xs);
  margin-block-start: var(--space-2xl);
}

.res-pagination__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-inline-size: 40px;
  min-block-size: 40px;
  padding: 0 0.75rem;
  border: 1px solid var(--color-line-soft);
  background: var(--color-surface);
  color: var(--color-ink);
  font-family: var(--font-sans);
  font-size: var(--fs-sm);
  transition: all var(--dur-fast) var(--ease-standard);
}

.res-pagination__btn:hover:not([disabled]):not([aria-current="page"]) {
  border-color: var(--color-ink);
}

.res-pagination__btn[aria-current="page"] {
  background: var(--color-brand);
  border-color: var(--color-brand);
  color: var(--color-white);
}

.res-pagination__btn[disabled] {
  opacity: 0.4;
  cursor: not-allowed;
}

/* ══ RESPONSIVE FILTER DRAWER (match navbar__menu mobile breakpoint) ══ */
@media (max-width: 48rem) {
  .res-filters__toggle { display: inline-flex; }

  .res-filters {
    align-items: stretch;
    display: none;
  }

  .res-filters[data-open="true"] { display: flex; }

  .res-filters__field { min-inline-size: 0; }

  .res-filters__actions { margin-inline-start: 0; justify-content: space-between; }
}

/* ══ ARTICLE (detail page) ═════════════════════════════════════════════ */
.article-header {
  max-inline-size: var(--container-narrow);
  margin-inline: auto;
}

.article-header__badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2xs);
  margin-block-end: var(--space-md);
}

.article-header__title { margin-block-end: var(--space-md); }

.article-header__excerpt {
  font-size: var(--fs-md);
  color: var(--color-ink-soft);
  line-height: var(--lh-relaxed);
  margin-block-end: var(--space-lg);
}

.article-byline {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-sm);
  padding-block: var(--space-md);
  border-block: 1px solid var(--color-line);
  font-size: var(--fs-sm);
  color: var(--color-muted);
}

.article-byline strong { color: var(--color-ink); font-family: var(--font-display); font-weight: 400; }

.article-featured-media {
  max-inline-size: var(--container-narrow);
  margin: var(--space-xl) auto;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--color-surface-sunken);
}

.article-featured-media img {
  inline-size: 100%;
  block-size: 100%;
  object-fit: cover;
}

.article-body {
  max-inline-size: var(--container-narrow);
  margin-inline: auto;
}

.article-callout {
  padding: var(--space-lg);
  border-inline-start: 3px solid var(--color-brand);
  background: var(--color-brand-50);
  font-size: var(--fs-md);
  color: var(--color-ink);
  line-height: var(--lh-relaxed);
}

.article-demo-note {
  margin-block-start: var(--space-xl);
  font-size: var(--fs-xs);
  color: var(--color-muted);
}

/* ══ RELATED CONTENT ════════════════════════════════════════════════════ */
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

@media (max-width: 62rem) { .related-grid { grid-template-columns: 1fr; } }

/* ══ PAGE-HEADER HERO (inner pages: /blog/, /guides/, /use-cases/, /) ════
   Not present in the copied core system (that hero variant lives only in
   the main site's home.css, which this standalone project does not ship).
   Defined here instead so inner-page heroes render correctly on their own. */
.hero--page {
  position: relative;
  background: var(--hub-gradient-hero), var(--color-surface-alt);
  overflow: hidden;
}

.hero--page::after {
  content: "";
  position: absolute;
  inset-block-end: -1px;
  inset-inline: 0;
  block-size: 1px;
  background: var(--color-line-soft);
}

.hero--page .breadcrumb { margin-block-end: var(--space-md); }

.hero--page .eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3xs);
  padding: 0.4rem 0.9rem;
  background: var(--color-brand-100);
  color: var(--color-brand-700);
}

.hero--page .hero__title {
  letter-spacing: var(--tracking-tight);
  margin-block: var(--space-md);
}

/* ══ PAGE HERO — condensed dark band (no video), for every inner page ══ */
.hero--page {
  min-block-size: auto;
  max-block-size: none;
  align-items: start;
  padding-block: clamp(3rem, 5rem + 4vw, 4.5rem) clamp(3rem, 2.5rem + 2vw, 4.5rem);
}
.hero--page .hero__title {
  max-inline-size: 26ch;
  font-size: clamp(2.25rem, 1.75rem + 2.6vw, 3.5rem);
  white-space: normal;
}
.hero--page .hero__lead {
  font-size: clamp(1.0625rem, 1rem + 0.4vw, 1.25rem);
  line-height: 1.6;
  max-inline-size: 56ch;
  color: rgba(235, 240, 248, 0.86);
}
.hero--page .hero__actions { margin-block-start: var(--space-lg); }

/* ══ HERO — video variant (site homepage pattern, scaled to a page-header
   height). Layer order: .hero__bg (gradient/navy seal) → .hero__bg-img
   (poster fallback + prefers-reduced-motion) → .hero__bg-video (loop). ══ */
.hero--video {
  min-block-size: clamp(26rem, 62vh, 38rem);
  display: flex;
  align-items: center;
  background: var(--navy-950);
  isolation: isolate;
}

.hero--video > picture { display: contents; }

/* Text must win the stack unambiguously — don't rely on the video/scrim's
   negative z-index alone; some engines mis-stack negative z-index inside
   an isolated context when combined with overflow:hidden on the parent
   (.hero--page). Give the copy its own explicit layer instead. */
.hero--video > .container {
  position: relative;
  z-index: 1;
}

.hero--video .hero__bg {
  position: absolute;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(120% 120% at 82% 40%, rgba(21, 58, 122, 0.55), transparent 60%),
    var(--navy-950);
}

.hero--video .hero__bg-img {
  position: absolute;
  inset: 0;
  inline-size: 100%;
  block-size: 100%;
  object-fit: cover;
  object-position: 78% center;
  opacity: 0.78;
  z-index: -1;
  -webkit-mask-image: linear-gradient(90deg, transparent 4%, #000 42%);
  mask-image: linear-gradient(90deg, transparent 4%, #000 42%);
}

.hero--video .hero__bg-video {
  position: absolute;
  inset: 0;
  inline-size: 100%;
  block-size: 100%;
  object-fit: cover;
  object-position: center;
  z-index: -1;
  pointer-events: none;
}

@media (prefers-reduced-motion: reduce) {
  .hero--video .hero__bg-video { display: none; }
}

.hero--video::after {
  /* Lighter than the homepage's .hero::after — this hero is shorter, so
     the same stop positions read as more washed-out; pulled the opacity
     down at each stop so the video stays visible while the headline still
     holds contrast on the left. */
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  height: 100%;
  background: linear-gradient(90deg, rgba(5, 10, 22, 0.55) 12%, rgba(5, 10, 22, 0.32) 46%, transparent 72%);
  pointer-events: none;
}

.hero--video .eyebrow {
  background: rgba(76, 141, 255, 0.16);
  color: #ffffff;
  font-family: var(--font-display);
}

.hero--video .hero__lead {
  max-inline-size: var(--measure);
  color: var(--color-ink-soft);
  margin-block-end: var(--space-lg);
}

/* ══ ENTRY CARDS (homepage "three ways in") — photography + gradient scrim ══ */
.entry-card {
  overflow: hidden;
  border: 1px solid var(--color-line-soft);
  padding: var(--space-lg);
  transition: transform var(--dur-base) var(--ease-standard), box-shadow var(--dur-base) var(--ease-standard), border-color var(--dur-base) var(--ease-standard);
}

.entry-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-brand-100);
}

.entry-card__media {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  margin-block-end: var(--space-md);
}

.entry-card__media img {
  inline-size: 100%;
  block-size: 100%;
  object-fit: cover;
  transition: transform var(--dur-slow) var(--ease-standard);
}

.entry-card:hover .entry-card__media img {
  transform: scale(1.06);
}

/* ══ CLOSING CTA BAND ═══════════════════════════════════════════════════
   Same rationale as .hero--page above — ported forward as its own rule
   rather than pulled from the main site's page-specific stylesheet. */
.closing {
  padding-block: clamp(3rem, 2.25rem + 4vw, 5.5rem);
  text-align: center;
}

.closing__inner {
  max-inline-size: 56ch;
  margin-inline: auto;
}

.closing__title { margin-block-end: var(--space-sm); }
.closing__text { color: var(--color-ink-soft); line-height: var(--lh-relaxed); }
.closing__actions { margin-block-start: var(--space-lg); }

.closing__actions .btn:not(.btn--secondary):not(.btn--light) {
  background: var(--hub-gradient-brand);
  border-color: transparent;
}

/* ==========================================================================
   UI POLISH PASS — modernization layer for header, footer, cards, filters,
   pagination, and article prose. Sits on top of components.css/typography.css
   and only refines spacing/type/color using existing tokens; no new
   one-off values are introduced.
   ========================================================================== */

/* ══ HEADER — sticky shadow, careers link treatment, tighter scrolled state ══ */
.site-header {
  transition: box-shadow var(--dur-base) var(--ease-standard),
              block-size var(--dur-base) var(--ease-standard);
  box-shadow: none;
}

.site-header[data-scrolled="true"] {
  box-shadow: var(--shadow-sm);
}

.site-header[data-scrolled="true"] .navbar {
  block-size: var(--header-height-scrolled);
}

.navbar {
  transition: block-size var(--dur-base) var(--ease-standard);
}

.navbar__menu {
  gap: var(--space-2xs);
}

.navbar__link {
  position: relative;
  border-block-end: none;
}

.navbar__link::after {
  content: "";
  position: absolute;
  inset-inline: 0.85rem;
  inset-block-end: 0.1rem;
  block-size: 2px;
  background: var(--color-ink);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur-base) var(--ease-standard);
}

.navbar__link:hover::after { transform: scaleX(1); }

.navbar__link[aria-current="page"] {
  color: var(--color-ink);
}

.navbar__link[aria-current="page"]::after { transform: scaleX(1); }

.navbar__link--careers {
  display: inline-flex;
  align-items: center;
  gap: 0.3em;
}

.navbar__link--careers::before {
  content: "";
  inline-size: 0.85em;
  block-size: 0.85em;
  background-color: currentColor;
  opacity: 0.55;
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6'/%3E%3Cpolyline points='15 3 21 3 21 9'/%3E%3Cline x1='10' y1='14' x2='21' y2='3'/%3E%3C/svg%3E") center / contain no-repeat;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6'/%3E%3Cpolyline points='15 3 21 3 21 9'/%3E%3Cline x1='10' y1='14' x2='21' y2='3'/%3E%3C/svg%3E") center / contain no-repeat;
}

.navbar__actions .btn:focus-visible,
.navbar__link:focus-visible {
  outline: none;
  box-shadow: var(--ring-focus);
  border-radius: var(--radius-xs);
}

@media (max-width: 62rem) {
  .navbar__link::after { display: none; }
  .navbar__link[aria-current="page"] { color: var(--color-brand); }
}

/* ══ FOOTER — spacing + alignment refinement ═══════════════════════════ */
.site-footer {
  padding-block: var(--space-3xl) var(--space-xl);
}

.footer__grid { gap: var(--space-2xl) var(--space-xl); }

.footer__brand .navbar__brand { margin-block-end: var(--space-2xs); }

.footer__certs { flex-wrap: wrap; row-gap: var(--space-sm); }

.footer__office { display: flex; flex-direction: column; gap: var(--space-xs); }

.footer__office-title {
  font-family: var(--font-display);
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  color: var(--color-ink);
}

.footer__offices {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: var(--space-lg) var(--space-xl);
  margin-block-start: var(--space-2xl);
  padding-block-start: var(--space-xl);
  border-block-start: 1px solid var(--color-line);
}

.footer__address-row {
  display: flex;
  align-items: flex-start;
  gap: var(--space-xs);
  color: var(--color-ink-soft);
  font-size: var(--fs-sm);
  line-height: var(--lh-normal);
}

.footer__icon {
  inline-size: 1.05rem;
  block-size: 1.05rem;
  flex-shrink: 0;
  margin-block-start: 0.15em;
  color: var(--color-muted);
}

.footer__bottom { margin-block-start: var(--space-xl); }

.footer__social { gap: var(--space-md); }

.footer__meta { flex-wrap: wrap; gap: var(--space-md); }

/* ══ SECTION RHYTHM — consistent vertical spacing on listing/index pages ══ */
.section { padding-block: var(--section-y); }
.section + .section { padding-block-start: 0; }

.section__head {
  display: flex;
  flex-direction: column;
  gap: var(--space-2xs);
  margin-block-end: var(--space-xl);
  max-inline-size: 60ch;
}

.section__head--start { align-items: flex-start; }

/* ══ FILTER BAR — modern control group ═════════════════════════════════ */
.res-filters {
  gap: var(--space-lg);
  align-items: flex-end;
}

.res-filters__field .select,
.res-filters__field .input {
  min-block-size: 44px;
}

.res-filters__actions {
  gap: var(--space-md);
  padding-block-start: var(--space-3xs);
}

.res-filters__count {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3xs);
  font-family: var(--font-display);
  color: var(--color-ink-soft);
}

.res-filters__count[data-active="true"] {
  color: var(--color-brand);
}

.res-filters__actions .btn--underline {
  min-block-size: 44px;
  display: inline-flex;
  align-items: center;
}

/* ══ CARD GRID — premium hover, tighter rhythm, consistent truncation ══ */
.res-grid { gap: var(--space-xl) var(--space-lg); }

.res-card {
  transition: transform var(--dur-base) var(--ease-standard),
              box-shadow var(--dur-base) var(--ease-standard),
              border-color var(--dur-base) var(--ease-standard);
}

.res-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-brand-100);
}

.res-card__media {
  margin-block-end: var(--space-md);
}

.res-card__media img {
  transition: transform var(--dur-slow) var(--ease-standard);
}

.res-card:hover .res-card__media img {
  transform: scale(1.04);
}

.res-card .card__title {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: var(--lh-snug);
}

.res-card .card__text {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: var(--lh-normal);
}

.res-card__meta {
  border-block-start: 1px solid var(--color-line-soft);
  margin-block-start: var(--space-sm);
  padding-block-start: var(--space-sm);
}

.res-card__badges .badge { letter-spacing: var(--tracking-wide); }

/* ══ PAGINATION — clearer current state, ≥44px tap targets ════════════ */
.res-pagination__btn {
  min-inline-size: 44px;
  min-block-size: 44px;
  font-family: var(--font-display);
}

/* ══ ARTICLE — readable measure, refined callout, breadcrumb ══════════ */
.breadcrumb { padding-block-end: var(--space-2xs); }

.article-header__excerpt { max-inline-size: var(--measure); }

.article-body.prose { font-size: var(--fs-base); }

.article-body.prose h2,
.article-body.prose h3 { color: var(--color-ink); }

.article-byline strong { color: var(--color-ink); }

.related-grid { gap: var(--space-xl) var(--space-lg); }
.related-grid .card {
  transition: transform var(--dur-base) var(--ease-standard), box-shadow var(--dur-base) var(--ease-standard), border-color var(--dur-base) var(--ease-standard);
}
.related-grid .card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--color-brand-100); }