/* BITSMART v2 — conocimiento / artículo */

.blog-hero {
  position: relative;
  min-height: 78svh;
  display: grid;
  align-items: end;
  gap: 2rem;
  padding: calc(var(--header-h) + 2rem) var(--page-pad) 2.5rem;
  overflow: hidden;
}

.blog-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(60% 55% at 100% 0%, rgba(0, 45, 93, 0.5) 0%, transparent 58%),
    radial-gradient(40% 40% at 0% 100%, rgba(0, 45, 93, 0.18) 0%, transparent 50%);
}

.blog-hero-copy {
  position: relative;
  z-index: 1;
  max-width: 38rem;
}

.blog-hero h1 {
  margin: 0.4em 0 0;
  font-size: clamp(2.4rem, 7.2vw, 5.6rem);
  font-weight: 800;
  letter-spacing: -0.045em;
  line-height: 0.96;
  overflow: hidden;
}

.blog-hero-visual {
  position: relative;
  z-index: 1;
  margin: 0;
  height: min(38vh, 340px);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.blog-hero-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.knowledge-featured {
  display: grid;
  gap: 1.5rem;
  padding: 1rem var(--page-pad) 2.5rem;
  color: inherit;
  opacity: 1;
  visibility: visible;
}

.knowledge-featured-media {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-md);
  aspect-ratio: 16 / 10;
  background: var(--color-bg-deep);
}

.knowledge-featured-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.7s var(--ease);
}

.knowledge-featured-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 55%, rgba(0, 45, 93, 0.35) 100%);
  transition: background 0.45s var(--ease);
}

.knowledge-featured-copy h2 {
  margin: 0.35rem 0 0.6rem;
  font-size: clamp(1.6rem, 3.4vw, 2.4rem);
  letter-spacing: -0.035em;
  line-height: 1.12;
  transition: transform 0.45s var(--ease);
}

.knowledge-featured-copy .meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin: 0 0 0.8rem;
  font-size: var(--text-meta);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-faint);
}

.knowledge-arrow {
  display: inline-flex;
  margin-top: 1rem;
  font-size: var(--text-meta);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-red);
  transition: transform 0.35s var(--ease);
}

.knowledge-featured:hover .knowledge-featured-media img,
.knowledge-item:hover .knowledge-media img {
  transform: scale(1.03);
}

.knowledge-featured:hover .knowledge-featured-copy h2,
.knowledge-item:hover h3 {
  transform: translateX(6px);
}

.knowledge-featured:hover .knowledge-arrow,
.knowledge-item:hover .knowledge-arrow {
  transform: translateX(6px);
}

.knowledge-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.1rem;
  padding: 1.2rem var(--page-pad) 3rem;
}

.knowledge-item.is-filtered {
  display: none;
}

.knowledge-item {
  display: grid;
  color: inherit;
  overflow: hidden;
}

.knowledge-media {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-md);
  aspect-ratio: 16 / 10;
  background: var(--color-bg-deep);
}

.knowledge-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.7s var(--ease);
}

.knowledge-item h3 {
  margin: 0.45rem 0 0.35rem;
  font-size: 1.2rem;
  letter-spacing: -0.03em;
  transition: transform 0.45s var(--ease);
}

.knowledge-item .cat,
.knowledge-featured .cat {
  margin: 0.7rem 0 0;
  font-size: var(--text-meta);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-red);
}

.knowledge-item p {
  margin: 0;
  color: var(--color-muted);
  font-size: var(--text-small);
}

.knowledge-item .meta {
  margin: 0.55rem 0 0;
  font-size: var(--text-meta);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-faint);
}

.knowledge-item.is-text {
  align-content: end;
  min-height: 280px;
  padding: 1.4rem;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
}

.knowledge-item.is-text .knowledge-media {
  display: none;
}

.play-badge {
  position: absolute;
  left: 1rem;
  bottom: 1rem;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.35rem 0.65rem;
  border-radius: 999px;
  background: rgba(0, 45, 93, 0.72);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.play-badge i {
  display: block;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 5px 0 5px 8px;
  border-color: transparent transparent transparent #fff;
  transition: transform 0.35s var(--ease);
}

.knowledge-item.is-video:hover .play-badge i {
  transform: translateX(2px);
}

.blog-pager {
  display: flex;
  gap: 0.4rem;
  align-items: center;
  padding: 0 var(--page-pad) 4rem;
  font-size: var(--text-meta);
  letter-spacing: 0.14em;
}

.blog-pager a,
.blog-pager span {
  min-width: 2.2rem;
  min-height: 2.2rem;
  display: grid;
  place-items: center;
  color: var(--color-muted);
}

.blog-pager [aria-current="page"] {
  color: var(--color-red);
  border-bottom: 1px solid var(--color-red);
}

.read-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 85;
  height: 2px;
  width: 0;
  background: var(--color-red);
  transform-origin: left center;
  pointer-events: none;
}

.article-hero {
  padding: calc(var(--header-h) + 2.2rem) var(--page-pad) 2rem;
  max-width: 52rem;
}

.article-hero h1 {
  margin: 0.45em 0 0;
  font-size: clamp(1.85rem, 4.6vw, 3.6rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.12;
  overflow-wrap: break-word;
}

.article-hero .lede {
  max-width: 40em;
}

.article-hero .meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin: 1.1rem 0 0;
  font-size: var(--text-meta);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-faint);
}

.article-cover {
  width: min(94vw, 100%);
  margin: 0 auto 3rem;
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.article-cover img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.article-layout {
  display: grid;
  gap: 2rem;
  padding: 0 var(--page-pad) 3rem;
}

.article-toc {
  display: none;
}

.article-toc p {
  margin: 0 0 0.8rem;
  font-size: var(--text-meta);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-faint);
}

.article-toc ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

.article-toc a {
  display: block;
  padding: 0.4rem 0;
  border-bottom: 1px solid var(--border-subtle);
  font-size: var(--text-small);
  color: var(--color-muted);
}

.article-toc a:hover,
.article-toc a.is-active {
  color: var(--color-text);
}

.article-toc-mobile {
  margin: 0 0 1.5rem;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 0.8rem 1rem;
}

.article-toc-mobile summary {
  cursor: pointer;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: var(--text-meta);
}

.article-content {
  max-width: 740px;
}

.article-content h2 {
  margin: 2.4em 0 0.7em;
  font-size: clamp(1.4rem, 2.4vw, 1.9rem);
  letter-spacing: -0.03em;
}

.article-content h2 .num {
  display: block;
  margin-bottom: 0.35rem;
  font-size: var(--text-meta);
  letter-spacing: 0.16em;
  color: var(--color-red);
  font-weight: 600;
}

.article-content h3 {
  margin: 1.6em 0 0.5em;
  font-size: 1.15rem;
}

.article-content p,
.article-content li {
  color: var(--color-muted);
}

.article-content a {
  color: var(--color-text);
  border-bottom: 1px solid rgba(225, 37, 27, 0.55);
}

.article-content a[target="_blank"]::after {
  content: " ↗";
  font-size: 0.85em;
  color: var(--color-red);
}

.article-content ul,
.article-content ol {
  padding-left: 1.2rem;
}

.article-quote {
  max-width: 52rem;
  margin: 2.8rem 0;
  padding: 1.4rem 0;
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.article-quote p {
  margin: 0;
  max-width: 22ch;
  font-size: clamp(1.35rem, 3vw, 2.1rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.12;
  color: var(--color-text);
}

.article-content figure {
  margin: 2rem 0;
}

.article-content figure img {
  width: 100%;
  border-radius: var(--radius-md);
}

.article-content figcaption {
  margin-top: 0.55rem;
  font-size: var(--text-meta);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-faint);
}

.article-content .is-wide {
  width: 100%;
}

.article-pair {
  display: grid;
  gap: 0.8rem;
}

.video-frame {
  position: relative;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--color-bg-deep);
  margin: 2rem 0;
}

.video-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.55;
}

.video-play {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  background: transparent;
  border: 0;
  color: #fff;
}

.video-play span {
  width: 64px;
  height: 64px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--color-red);
}

.video-play i {
  display: block;
  width: 0;
  height: 0;
  margin-left: 3px;
  border-style: solid;
  border-width: 8px 0 8px 14px;
  border-color: transparent transparent transparent #fff;
}

.tech-sheet {
  margin: 2.2rem 0;
  padding: 1.2rem 0;
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.tech-sheet h3 {
  margin: 0 0 1rem;
  font-size: var(--text-meta);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-red);
}

.tech-sheet dl {
  display: grid;
  gap: 0.85rem 1.5rem;
  margin: 0;
}

.tech-sheet dt {
  font-size: var(--text-meta);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-faint);
}

.tech-sheet dd {
  margin: 0.15rem 0 0;
  color: var(--color-text);
}

.table-wrap {
  overflow-x: auto;
  margin: 2rem 0;
}

.article-content table {
  width: 100%;
  min-width: 480px;
  border-collapse: collapse;
  font-size: var(--text-small);
}

.article-content th,
.article-content td {
  padding: 0.7rem 0.8rem;
  border-bottom: 1px solid var(--border-subtle);
  text-align: left;
}

.article-content th {
  font-size: var(--text-meta);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-faint);
}

.more-block {
  margin: 2.4rem 0;
  padding: 1.1rem 0;
  border-top: 1px solid var(--border-subtle);
}

.more-block h3 {
  margin: 0 0 0.6rem;
  font-size: var(--text-meta);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-red);
}

.article-inline-cta {
  margin: 2.8rem 0;
  padding: 1.4rem 0;
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.article-inline-cta p {
  margin: 0 0 0.7rem;
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--color-text);
}

.article-share {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin: 2rem 0 0;
}

.article-share button,
.article-share a {
  min-height: 40px;
  padding: 0.4rem 0.8rem;
  border: 1px solid var(--border-subtle);
  border-radius: 999px;
  background: transparent;
  color: var(--color-muted);
  font-size: var(--text-meta);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.related-grid {
  display: grid;
  gap: 1rem;
  padding: 2rem var(--page-pad) 3rem;
}

.related-grid h2 {
  grid-column: 1 / -1;
  margin: 0 0 0.4rem;
  font-size: 1.6rem;
}

@media (min-width: 768px) {
  .blog-hero {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: center;
    min-height: 84svh;
  }

  .blog-hero-visual {
    height: min(58vh, 520px);
  }

  .knowledge-featured {
    grid-template-columns: 1.35fr 1fr;
    align-items: center;
    gap: 2.5rem;
  }

  .knowledge-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 1.1rem;
  }

  .knowledge-item {
    flex: 1 1 calc(50% - 0.55rem);
    min-width: min(100%, 18rem);
  }

  .knowledge-item.is-video,
  .knowledge-item:nth-child(3n + 1) {
    flex: 1 1 100%;
  }

  .knowledge-item:nth-child(3n + 1) .knowledge-media,
  .knowledge-item.is-video .knowledge-media {
    aspect-ratio: 21 / 9;
  }

  .tech-sheet dl {
    grid-template-columns: 1fr 1fr;
  }

  .article-pair {
    grid-template-columns: 1fr 1fr;
  }

  .related-grid {
    grid-template-columns: 1.4fr 1fr 1fr;
  }
}

@media (min-width: 1024px) {
  .article-layout {
    grid-template-columns: 180px minmax(0, 1fr);
    gap: 3rem;
  }

  .article-toc {
    display: block;
    position: sticky;
    top: 6.4rem;
    align-self: start;
  }

  .article-toc-mobile {
    display: none;
  }
}

@media (max-width: 767px) {
  .blog-hero {
    min-height: 88svh;
    align-items: start;
  }
}