/*
 * Vahid Jafari — Knowledge Content System v1.06.2
 * Shared presentation for Framework / Case Study / Problem archives
 * and single records. Visual identity changes through explicit model modifiers;
 * spacing, typography and controls remain on the global design system.
 */

.vj-kc-archive,
.vj-kc-single { overflow: clip; }

.vj-kc-archive__hero {
  padding-block: clamp(2.5rem, 5vw, 5.5rem) clamp(4rem, 8vw, 7rem);
  border-block-end: 1px solid var(--vj-color-border-default);
}

.vj-kc-archive__hero .vj-breadcrumbs,
.vj-kc-single__hero .vj-breadcrumbs { margin-block-start: 0; }

.vj-kc-archive__hero-grid,
.vj-kc-single__hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(300px, .85fr);
  gap: clamp(2rem, 7vw, 7rem);
  align-items: end;
  padding-block-start: clamp(3rem, 7vw, 6rem);
}

.vj-kc-archive__copy h1,
.vj-kc-single__hero-copy h1 {
  max-inline-size: 850px;
  margin: .55rem 0 1.25rem;
  font-size: clamp(2.5rem, 5.4vw, 4.7rem);
  line-height: 1.08;
  font-weight: 700;
  text-wrap: balance;
}

.vj-kc-archive__lead,
.vj-kc-single__lead {
  max-inline-size: 720px;
  margin: 0;
  color: var(--vj-color-text-secondary);
  font-size: var(--vj-font-lead-fa);
  line-height: var(--vj-line-lead-fa);
}

html[lang^="en"] .vj-kc-archive__lead,
html[lang^="en"] .vj-kc-single__lead {
  font-size: var(--vj-font-lead-en);
  line-height: var(--vj-line-lead-en);
}

.vj-kc-archive__actions,
.vj-kc-single__meta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  margin-block-start: 2rem;
}

.vj-kc-archive__actions .vj-arrow-link { margin-block-start: 0; }

.vj-kc-archive__visual,
.vj-kc-single__hero-visual {
  min-block-size: 310px;
  position: relative;
  display: grid;
  place-items: center;
  overflow: hidden;
  border: 1px solid var(--vj-color-border-default);
  border-radius: var(--vj-radius-lg);
  background: linear-gradient(135deg, var(--vj-color-bg-surface), var(--vj-color-bg-muted));
}

.vj-kc-archive__marker,
.vj-kc-single__marker {
  position: relative;
  z-index: 2;
  font-family: Georgia, 'Times New Roman', serif;
  font-size: clamp(9rem, 17vw, 15rem);
  line-height: .7;
  font-weight: 400;
  color: var(--vj-color-brand-primary);
  opacity: .95;
}

.vj-kc-archive__motif,
.vj-kc-single__gridmark {
  position: absolute;
  inset: 12% 12%;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: .65rem;
  opacity: .55;
  transform: rotate(-7deg);
}

.vj-kc-single__gridmark { grid-template-columns: repeat(3, 1fr); inset: 14%; }

.vj-kc-archive__motif span,
.vj-kc-single__gridmark span {
  min-block-size: 3rem;
  border: 1px solid color-mix(in srgb, var(--vj-color-brand-accent) 42%, var(--vj-color-border-default));
  background: color-mix(in srgb, var(--vj-color-bg-surface) 70%, var(--vj-color-brand-accent) 30%);
}


.vj-kc-archive--framework .vj-kc-archive__motif span,
.vj-kc-single--framework .vj-kc-single__gridmark span { border-radius: 50%; }

.vj-kc-archive--case_study .vj-kc-archive__motif { grid-template-columns: 1.8fr .8fr .8fr 1.5fr .6fr; }
.vj-kc-archive--case_study .vj-kc-archive__motif span:nth-child(odd) { min-block-size: 7rem; }

.vj-kc-archive--problem .vj-kc-archive__motif { grid-template-columns: repeat(3, 1fr); }
.vj-kc-archive--problem .vj-kc-archive__motif span:nth-child(4),
.vj-kc-archive--problem .vj-kc-archive__motif span:nth-child(5) { grid-column: span 1; }

.vj-kc-archive__motif-label {
  position: absolute;
  inset-inline-end: 1.2rem;
  inset-block-end: 1rem;
  display: grid;
  gap: .2rem;
  text-align: end;
}
.vj-kc-archive__motif-label span { color: var(--vj-color-brand-accent); font-size: .78rem; font-weight: 700; }
.vj-kc-archive__motif-label strong { font-size: .9rem; }

.vj-kc-section-head {
  display: grid;
  grid-template-columns: minmax(0, .9fr) minmax(260px, .8fr);
  gap: 2rem;
  align-items: end;
  margin-block-end: 2rem;
}
.vj-kc-section-head h2 { margin: .45rem 0 0; font-size: clamp(1.8rem, 3.1vw, 2.75rem); line-height: 1.2; text-wrap: balance; }
.vj-kc-section-head > p { margin: 0; color: var(--vj-color-text-secondary); max-inline-size: 620px; }

.vj-kc-featured { padding-block: var(--vj-section-space); background: var(--vj-color-bg-muted); }
.vj-kc-featured__card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, .9fr);
  min-block-size: 340px;
  overflow: hidden;
  border: 1px solid var(--vj-color-border-default);
  border-radius: var(--vj-radius-lg);
  background: var(--vj-color-bg-surface);
}
.vj-kc-featured__media { display: block; min-block-size: 100%; background: var(--vj-color-bg-muted); }
.vj-kc-featured__media img { inline-size: 100%; block-size: 100%; object-fit: cover; }
.vj-kc-featured__placeholder { display: grid; place-items: center; inline-size: 100%; block-size: 100%; font: 400 clamp(7rem, 12vw, 11rem) / 1 Georgia, serif; color: var(--vj-color-brand-primary); }
.vj-kc-featured__body { display: flex; flex-direction: column; justify-content: center; padding: clamp(2rem, 5vw, 4rem); }
.vj-kc-featured__body h2 { margin: 1rem 0 .8rem; font-size: clamp(1.8rem, 3vw, 2.7rem); line-height: 1.2; text-wrap: balance; }
.vj-kc-featured__body h2 a { text-decoration: none; }
.vj-kc-featured__body > p { margin: 0; color: var(--vj-color-text-secondary); }

.vj-kc-listing { padding-block: var(--vj-section-space); }
.vj-kc-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--vj-grid-gap);
}
.vj-kc-card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-block-size: 100%;
  overflow: hidden;
  border: 1px solid var(--vj-color-border-default);
  border-radius: var(--vj-radius-lg);
  background: var(--vj-color-bg-surface);
  transition: transform var(--vj-motion-standard) ease, box-shadow var(--vj-motion-standard) ease, border-color var(--vj-motion-standard) ease;
}
.vj-kc-card:hover { transform: translateY(-3px); box-shadow: var(--vj-shadow-sm); border-color: color-mix(in srgb, var(--vj-color-brand-accent) 28%, var(--vj-color-border-default)); }
.vj-kc-card__media { display: block; aspect-ratio: 16 / 9; background: linear-gradient(135deg, var(--vj-color-bg-muted), var(--vj-color-bg-surface)); overflow: hidden; }
.vj-kc-card__media img { inline-size: 100%; block-size: 100%; object-fit: cover; transition: transform .35s ease; }
.vj-kc-card:hover .vj-kc-card__media img { transform: scale(1.025); }
.vj-kc-card__media span { display: grid; place-items: center; block-size: 100%; font: 400 6rem/1 Georgia, serif; color: var(--vj-color-brand-primary); }
.vj-kc-card__body { display: flex; flex: 1; flex-direction: column; padding: 1.5rem; }
.vj-kc-card__topline,
.vj-kc-card__meta {
  display: flex;
  justify-content: space-between;
  gap: .75rem;
  color: var(--vj-color-text-muted);
  font-size: .8rem;
}
.vj-kc-card__topline span:first-child { color: var(--vj-color-brand-accent); font-weight: 700; }
.vj-kc-card h3 { margin: 1rem 0 .8rem; font-size: 1.35rem; line-height: 1.35; }
.vj-kc-card h3 a { text-decoration: none; }
.vj-kc-card p { margin: 0; color: var(--vj-color-text-secondary); }
.vj-kc-card__meta { margin-block-start: auto; padding-block-start: 1.25rem; }
.vj-kc-card__action { display: inline-flex; align-items: center; gap: .35rem; margin-block-start: 1rem; color: var(--vj-color-text-primary); font-weight: 700; text-decoration: none; }
.vj-kc-card__action:hover { color: var(--vj-color-brand-accent); }

.vj-kc-empty { padding: clamp(2rem, 5vw, 4rem); border: 1px dashed var(--vj-color-border-default); border-radius: var(--vj-radius-lg); background: var(--vj-color-bg-muted); }
.vj-kc-empty h3 { margin: .45rem 0 .5rem; font-size: 1.6rem; }
.vj-kc-empty p:last-child { margin: 0; color: var(--vj-color-text-secondary); }

.vj-kc-pagination { margin-block-start: 2.5rem; }
.vj-kc-pagination ul { display: flex; flex-wrap: wrap; gap: .5rem; list-style: none; margin: 0; padding: 0; }
.vj-kc-pagination a,
.vj-kc-pagination span { display: grid; min-inline-size: 2.6rem; min-block-size: 2.6rem; place-items: center; padding-inline: .7rem; border: 1px solid var(--vj-color-border-default); border-radius: var(--vj-radius-pill); text-decoration: none; }
.vj-kc-pagination .current { background: var(--vj-color-brand-primary); color: var(--vj-color-on-brand); border-color: var(--vj-color-brand-primary); }

.vj-kc-bridge,
.vj-kc-single__cta { background: var(--vj-color-brand-primary); color: var(--vj-color-on-dark); }
.vj-kc-bridge__inner,
.vj-kc-single__cta-inner { display: flex; justify-content: space-between; gap: 2rem; align-items: end; padding-block: clamp(3.5rem, 7vw, 6rem); }
.vj-kc-bridge h2,
.vj-kc-single__cta h2 { max-inline-size: 820px; margin: .5rem 0 .7rem; font-size: clamp(2rem, 3.6vw, 3.1rem); line-height: 1.2; text-wrap: balance; }
.vj-kc-bridge p:not(.vj-eyebrow),
.vj-kc-single__cta p:not(.vj-eyebrow) { max-inline-size: 720px; margin: 0; color: color-mix(in srgb, var(--vj-color-on-dark) 74%, transparent); }
.vj-kc-bridge .vj-button--primary,
.vj-kc-single__cta .vj-button--primary { background: var(--vj-color-on-dark); color: var(--vj-color-brand-primary); flex: 0 0 auto; }
.vj-kc-bridge .vj-button--primary:hover,
.vj-kc-single__cta .vj-button--primary:hover { background: var(--vj-color-bg-surface); }

/* Single */
.vj-kc-single__hero {
  padding-block: clamp(2.5rem, 5vw, 5.5rem) clamp(4rem, 8vw, 7rem);
  border-block-end: 1px solid var(--vj-color-border-default);
}
.vj-kc-single__hero-visual { min-block-size: 360px; }
.vj-kc-single__hero-visual small { position: absolute; inset-inline-end: 1.2rem; inset-block-end: 1rem; color: var(--vj-color-text-muted); font-size: .75rem; }
.vj-kc-single__meta-row { margin-block-start: 1.5rem; }
.vj-kc-single__reading { color: var(--vj-color-text-muted); font-size: .9rem; }
.vj-kc-single__language { display: inline-flex; align-items: center; gap: .4rem; margin-block-start: 1.25rem; color: var(--vj-color-brand-accent); font-weight: 700; text-decoration: none; }
.vj-kc-single__cover { margin: 0; padding-block: var(--vj-space-8); background: var(--vj-color-bg-muted); }
.vj-kc-single__cover img { inline-size: 100%; max-block-size: 700px; object-fit: cover; border-radius: var(--vj-radius-lg); }
.vj-kc-single__layout { display: grid; grid-template-columns: minmax(0, 1fr) minmax(260px, 320px); gap: clamp(2.5rem, 7vw, 7rem); padding-block: var(--vj-section-space); }
.vj-kc-single__body { min-inline-size: 0; }
.vj-kc-single__content { max-inline-size: var(--vj-article-measure-fa); margin-inline-start: auto; margin-inline-end: 0; font-size: clamp(1.05rem, 1.15vw, 1.16rem); line-height: 1.95; }
html[lang^="en"] .vj-kc-single__content { max-inline-size: var(--vj-article-measure-en); line-height: var(--vj-line-body-en); }
.vj-kc-single__content > :first-child { margin-block-start: 0; }
.vj-kc-single__content h2 { scroll-margin-block-start: 6rem; }
.vj-kc-single__content h3 { scroll-margin-block-start: 6rem; }
.vj-kc-single__footer { margin-block-start: 3rem; padding-block-start: 2rem; border-block-start: 1px solid var(--vj-color-border-default); }
.vj-kc-single__terms + .vj-kc-single__terms { margin-block-start: 1rem; }
/*
 * Sidebar stack: keep the TOC and the contextual NEXT card together.
 * The previous implementation made the TOC sticky independently while the
 * card remained in normal flow, which caused the card to slide underneath
 * the TOC during scroll.
 */
.vj-kc-single__aside {
  position: sticky;
  inset-block-start: 6rem;
  align-self: start;
  display: grid;
  gap: 2rem;
  min-block-size: 0;
}
.vj-kc-single__toc { position: static; min-block-size: 0; }
.vj-kc-single__toc ol {
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
  border-inline-start: 1px solid var(--vj-color-border-default);
  max-block-size: 55vh;
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-width: thin;
}
.vj-kc-single__toc li { margin: 0; }
.vj-kc-single__toc li a { display: block; padding: .5rem .75rem; color: var(--vj-color-text-secondary); text-decoration: none; }
.vj-kc-single__toc li a:hover { color: var(--vj-color-brand-accent); }
.vj-kc-single__toc-item--3 a { padding-inline-start: 1.5rem; font-size: .88rem; }
.vj-kc-single__aside-card {
  margin-block-start: 0;
  padding: 1.5rem;
  border: 1px solid var(--vj-color-border-default);
  border-radius: var(--vj-radius-lg);
  background: var(--vj-color-bg-muted);
}
.vj-kc-single__aside-card h2 { margin: .5rem 0 .6rem; font-size: 1.4rem; line-height: 1.3; }
.vj-kc-single__aside-card p:not(.vj-eyebrow) { margin: 0; color: var(--vj-color-text-secondary); }
.vj-kc-single__aside-card .vj-button { margin-block-start: 1rem; }

.vj-kc-related { padding-block: var(--vj-section-space); background: var(--vj-color-bg-muted); }
.vj-kc-related__grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--vj-grid-gap); }
.vj-kc-related-card { display: flex; flex-direction: column; min-block-size: 100%; padding: 1.5rem; border: 1px solid var(--vj-color-border-default); border-radius: var(--vj-radius-lg); background: var(--vj-color-bg-surface); }
.vj-kc-related-card__topline { display: flex; justify-content: space-between; gap: 1rem; color: var(--vj-color-text-muted); font-size: .8rem; }
.vj-kc-related-card__topline span:first-child { color: var(--vj-color-brand-accent); font-weight: 700; }
.vj-kc-related-card h3 { margin: 1rem 0 .65rem; font-size: 1.3rem; line-height: 1.35; }
.vj-kc-related-card h3 a { text-decoration: none; }
.vj-kc-related-card p { margin: 0; color: var(--vj-color-text-secondary); }
.vj-kc-related-card .vj-arrow-link { margin-block-start: auto; }

@media (max-width: 1024px) {
  .vj-kc-archive__hero-grid,
  .vj-kc-single__hero-grid { grid-template-columns: minmax(0, 1fr); gap: 2.5rem; }
  .vj-kc-archive__visual,
  .vj-kc-single__hero-visual { min-block-size: 250px; }
  .vj-kc-grid,
  .vj-kc-related__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .vj-kc-featured__card { grid-template-columns: 1fr; }
  .vj-kc-featured__media { min-block-size: 280px; }
  .vj-kc-single__layout { grid-template-columns: minmax(0, 1fr); }
  .vj-kc-single__content { margin-inline: 0; }
  .vj-kc-single__aside { position: static; }
}

@media (max-width: 760px) {
  .vj-kc-section-head { grid-template-columns: 1fr; gap: .75rem; }
  .vj-kc-bridge__inner,
  .vj-kc-single__cta-inner { flex-direction: column; align-items: flex-start; }
  .vj-kc-grid,
  .vj-kc-related__grid { grid-template-columns: 1fr; }
  .vj-kc-archive__copy h1,
  .vj-kc-single__hero-copy h1 { font-size: clamp(2.2rem, 9vw, 3.25rem); }
  .vj-kc-archive__actions { align-items: flex-start; flex-direction: column; }
  .vj-kc-card__body,
  .vj-kc-related-card { padding: 1.25rem; }
}

@media (max-width: 480px) {
  .vj-kc-archive__hero,
  .vj-kc-single__hero { padding-block-end: 3.5rem; }
  .vj-kc-archive__visual,
  .vj-kc-single__hero-visual { min-block-size: 210px; }
  .vj-kc-archive__marker,
  .vj-kc-single__marker { font-size: 8rem; }
  .vj-kc-single__cover { padding-block: 1rem; }
}

@media (prefers-reduced-motion: reduce) {
  .vj-kc-card,
  .vj-kc-card__media img { transition: none; }
  .vj-kc-card:hover,
  .vj-kc-card:hover .vj-kc-card__media img { transform: none; }
}

/* The editorial body is intentionally shared; each model differentiates its frame,
   motif and section rhythm rather than inventing a new typography system. */
.vj-kc-single .vj-content > figure,
.vj-kc-single .vj-content > .wp-caption { margin-block: 2rem; }
.vj-kc-single .vj-content > figure img,
.vj-kc-single .vj-content > .wp-caption img { inline-size: 100%; }
.vj-kc-single .vj-content a { text-underline-offset: .15em; }
.vj-kc-single .vj-content hr { border: 0; border-block-start: 1px solid var(--vj-color-border-default); margin-block: 3rem; }
.vj-kc-single--problem .vj-kc-single__hero-visual { background: linear-gradient(135deg, var(--vj-color-bg-muted), var(--vj-color-bg-surface)); }
.vj-kc-single--case_study .vj-kc-single__hero-visual { border-radius: 0; }
.vj-kc-single--framework .vj-kc-single__hero-visual { border-radius: 999px; }

.vj-kc-related-card .vj-arrow-link { min-block-size: 40px; padding: .6rem .85rem; font-size: .88rem; }