/* =============================================================================
   HOME CHAPTERS — the landing-page narrative after the 3D hero
   =============================================================================
   01 What I build (3D hero, css/neural-core.css) → 02 Who builds it (profile,
   About, Education) → 03 What I have built (Work) → 04 How I engineer systems
   (Skills) → 05 Research & engineering work (Stats + index) → 06 Contact.

   Loaded only with `neural_core: true` (index.md). Every rule is scoped as a
   sibling of #neural-core, so other pages are untouched and the id outranks
   the typesafe skin (`body.theme-typesafe .x`) without !important.
   Chapter labels come from markup: `.home-kicker` and `data-kicker` on h2.
   ========================================================================== */

#neural-core ~ section {
  --hc-fg: #f0f0fa;
  --hc-soft: rgba(240, 240, 250, 0.78);
  --hc-dim: rgba(240, 240, 250, 0.5);
  --hc-faint: rgba(240, 240, 250, 0.34);
  --hc-line: rgba(240, 240, 250, 0.14);
  --hc-line-strong: rgba(240, 240, 250, 0.3);
  --hc-lime: #c6f432;
  --hc-display: var(--ts-display, "Space Grotesk", "Helvetica Neue", Arial, sans-serif);
  --hc-mono: var(--ts-term, "Space Mono", "JetBrains Mono", ui-monospace, Consolas, monospace);
  --hc-ease: cubic-bezier(0.16, 1, 0.3, 1);
}

/* ------------------------------ shared labels ------------------------------ */

/* Chapter rule: thin line, a short lime segment, a small mono label. */
#neural-core ~ section .home-kicker,
#neural-core ~ .content-section > .section-title[data-kicker]::before {
  font-family: var(--hc-mono);
  font-size: 0.6rem;
  font-weight: 400;
  line-height: 1;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--hc-dim);
  -webkit-text-stroke: 0;
}

#neural-core ~ section .home-kicker {
  position: relative;
  margin: 0;
  padding-top: 16px;
  border-top: 1px solid var(--hc-line);
  text-align: left;
}

#neural-core ~ section .home-kicker b {
  font-weight: 400;
  color: var(--hc-lime);
  margin-right: 0.9em;
}

#neural-core ~ section .home-kicker::after,
#neural-core ~ .content-section > .section-title::after {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 44px;
  height: 1px;
  background: var(--hc-lime);
}

#neural-core ~ section .home-meta-label {
  margin: 26px 0 10px;
  font-family: var(--hc-mono);
  font-size: 0.58rem;
  line-height: 1;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  text-align: left;
  text-align-last: auto;
  color: var(--hc-faint);
}

/* ------------------------- 02 profile (index.md .hero) --------------------- */

#neural-core ~ .hero {
  display: grid;
  grid-template-columns: minmax(200px, 300px) minmax(0, 1fr);
  grid-template-areas:
    "kicker  kicker"
    "handoff handoff"
    "figure  content";
  row-gap: 0;
  column-gap: clamp(32px, 5.5vw, 76px);
  align-items: end;
  margin: 0 0 clamp(40px, 8vh, 96px);
  padding-top: clamp(24px, 6vh, 72px);
  text-align: left;
}

#neural-core ~ .hero > .home-kicker {
  grid-area: kicker;
  margin-bottom: clamp(28px, 5vh, 48px);
}

/* The scroll story already showed ENGINEER / BUILDER inside the 3D stage
   (.nc-handoff); this copy is for the static / reduced-motion hero. */
#neural-core ~ .hero > .home-handoff-title {
  grid-area: handoff;
  margin: 0 0 clamp(36px, 7vh, 72px);
  font-family: var(--hc-display);
  font-weight: 500;
  font-size: clamp(2.4rem, 8vw, 6.4rem);
  line-height: 0.86;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  text-align: left;
  text-align-last: auto;
  color: var(--hc-fg);
}

#neural-core ~ .hero > .home-handoff-title span {
  display: block;
}

#neural-core ~ .hero > .home-handoff-title span + span {
  color: var(--hc-faint);
}

#neural-core.nc-story ~ .hero > .home-handoff-title {
  display: none;
}

#neural-core ~ .hero > .hero-figure {
  grid-area: figure;
  margin: 0;
}

#neural-core ~ .hero .hero-photo {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  object-position: 50% 30%;
  border: 1px solid var(--hc-line-strong);
  border-radius: 0;
  filter: grayscale(1) contrast(1.06) brightness(0.92);
  transition: filter 0.6s var(--hc-ease);
}

#neural-core ~ .hero .hero-photo:hover {
  filter: grayscale(1) contrast(1.1) brightness(1);
}

#neural-core ~ .hero .hero-figure .home-meta-label {
  margin: 12px 0 0;
}

#neural-core ~ .hero > .hero-content {
  grid-area: content;
  min-width: 0;
}

#neural-core ~ .hero .hero-content h1 {
  margin: 0;
  font-family: var(--hc-display);
  font-weight: 500;
  font-size: clamp(2.5rem, 5.6vw, 4.7rem);
  line-height: 0.88;
  letter-spacing: 0.01em;
  text-transform: uppercase;
  color: var(--hc-fg);
  -webkit-text-stroke: 0;
}

/* The mission line reads as a statement, not a subtitle. */
#neural-core ~ .hero .hero-intro {
  margin: clamp(18px, 3vh, 28px) 0 0;
  max-width: 19em;
  font-family: var(--hc-display);
  font-style: normal;
  font-weight: 400;
  font-size: clamp(1.25rem, 2.3vw, 1.9rem);
  line-height: 1.16;
  text-align: left;
  text-align-last: auto;
  color: var(--hc-soft);
}

#neural-core ~ .hero .hero-interests {
  margin: 0;
  max-width: 60ch;
  font-family: var(--hc-mono);
  font-size: 0.7rem;
  line-height: 2;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-align: left;
  text-align-last: auto;
  color: var(--hc-dim);
}

#neural-core ~ .hero .social-links {
  margin-top: 0;
  gap: 6px;
  justify-content: flex-start;
}

#neural-core ~ .hero .social-link {
  width: 40px;
  height: 40px;
  border: 1px solid var(--hc-line-strong);
  border-radius: 0;
  background: transparent;
  color: var(--hc-soft);
  transition: color 0.2s, border-color 0.2s;
}

#neural-core ~ .hero .social-link svg,
#neural-core ~ .hero .social-link-logo {
  width: 18px;
  height: 18px;
}

#neural-core ~ .hero .social-link-logo {
  filter: grayscale(1) brightness(1.6);
  transition: filter 0.2s;
}

#neural-core ~ .hero .social-link:hover,
#neural-core ~ .hero .social-link:focus-visible {
  color: var(--hc-lime);
  border-color: var(--hc-lime);
  background: transparent;
  outline: none;
}

#neural-core ~ .hero .social-link:hover .social-link-logo {
  filter: none;
}

/* ------------------------------ chapter headings --------------------------- */

#neural-core ~ .content-section {
  margin-top: clamp(96px, 16vh, 176px);
}

#neural-core ~ .content-section > .section-title {
  position: relative;
  margin: 0 0 clamp(28px, 4.5vw, 52px);
  padding-top: 16px;
  border-top: 1px solid var(--hc-line);
  font-family: var(--hc-display);
  font-weight: 500;
  font-size: clamp(2.3rem, 6.4vw, 4.8rem);
  line-height: 0.9;
  letter-spacing: 0.01em;
  text-transform: uppercase;
  color: var(--hc-fg);
  -webkit-text-stroke: 0;
}

#neural-core ~ .content-section > .section-title[data-kicker]::before {
  content: attr(data-kicker);
  display: block;
  margin-bottom: clamp(26px, 4vw, 44px);
}

#neural-core ~ .content-section .research-intro {
  margin: calc(-1 * clamp(12px, 2.5vw, 30px)) 0 28px;
  font-family: var(--hc-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--hc-dim);
}

/* ---------------------------------- about --------------------------------- */

#neural-core ~ .about-section > .about-journey-title {
  margin: 0 0 18px;
  padding: 0;
  border: 0;
  font-family: var(--hc-mono);
  font-size: 0.6rem;
  font-weight: 400;
  line-height: 1;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--hc-faint);
}

#neural-core ~ .about-section > p {
  max-width: 66ch;
  margin: 0 0 1.25em;
  font-size: 1.02rem;
  line-height: 1.78;
  text-align: left;
  text-align-last: auto;
  color: var(--hc-soft);
}

/* First paragraph as the lead. */
#neural-core ~ .about-section > .about-journey-title + p {
  font-family: var(--hc-display);
  font-size: clamp(1.15rem, 1.9vw, 1.42rem);
  line-height: 1.5;
  color: var(--hc-fg);
}

@media (min-width: 900px) {
  #neural-core ~ .about-section {
    display: grid;
    grid-template-columns: minmax(150px, 1fr) minmax(0, 3fr);
    column-gap: 48px;
  }

  #neural-core ~ .about-section > .section-title {
    grid-column: 1 / -1;
  }

  #neural-core ~ .about-section > .about-journey-title {
    grid-column: 1;
    grid-row: 2 / span 5;
    align-self: start;
    position: sticky;
    top: calc(var(--nc-nav, 64px) + 28px);
    margin-top: 0.7em;
  }

  #neural-core ~ .about-section > p {
    grid-column: 2;
  }
}

/* ------------------------------ timeline / cards --------------------------- */
/* Same components as before, quieter surfaces: transparent panels, thin
   graphite rules, lime only where something is current or hovered. */

#neural-core ~ .content-section .timeline::before {
  background: var(--hc-line);
}

#neural-core ~ .content-section .timeline-item {
  background: transparent;
  border-left-width: 1px;
  border-left-color: var(--hc-line);
}

#neural-core ~ .content-section :is(.timeline-right, .timeline-content) {
  background: transparent;
  border: 0;
  border-top: 1px solid var(--hc-line);
  border-radius: 0;
  padding: 16px 0 0;
  transition: border-color 0.25s;
}

#neural-core ~ .content-section .timeline-item:hover :is(.timeline-right, .timeline-content) {
  border-top-color: var(--hc-lime);
}

#neural-core ~ .content-section .timeline-year {
  color: var(--hc-dim);
  letter-spacing: 0.16em;
}

#neural-core ~ .content-section .timeline-item h3 {
  font-family: var(--hc-display);
  font-weight: 500;
  color: var(--hc-fg);
}

#neural-core ~ .content-section :is(.skills-category, .stats-card, .stats-media-item, .hf-model-card, .experience-highlight) {
  background: transparent;
  border: 1px solid var(--hc-line);
}

#neural-core ~ .content-section .skills-category {
  border-left: 1px solid var(--hc-line);
  box-shadow: inset 2px 0 0 var(--hc-line-strong);
  transition: box-shadow 0.25s, border-color 0.25s;
}

#neural-core ~ .content-section .skills-category:hover {
  border-color: var(--hc-line-strong);
  box-shadow: inset 2px 0 0 var(--hc-lime);
}

#neural-core ~ .content-section .skills-category h3 {
  color: var(--hc-fg);
}

#neural-core ~ .content-section .hf-model-card:hover {
  border-color: var(--hc-lime);
}

#neural-core ~ .content-section .hf-total {
  margin: 0 0 12px;
  color: var(--hc-fg);
}

#neural-core ~ .content-section .hf-total b {
  color: var(--hc-lime);
}

#neural-core ~ .content-section .hf-all-models {
  display: inline-block;
  margin-top: 14px;
  color: var(--hc-lime);
  text-decoration: none;
}

#neural-core ~ .content-section .hf-all-models:hover {
  text-decoration: underline;
}

/* ------------------------- 05 research / engineering index ----------------- */

#neural-core ~ section .home-index {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: clamp(40px, 6vw, 72px);
  border-top: 1px solid var(--hc-line);
}

#neural-core ~ section .home-index a {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 18px 18px 22px 0;
  border-bottom: 1px solid var(--hc-line);
  font-family: var(--hc-display);
  font-size: clamp(1rem, 1.6vw, 1.22rem);
  line-height: 1.2;
  color: var(--hc-fg);
  text-decoration: none;
  transition: color 0.2s;
}

#neural-core ~ section .home-index a::after {
  content: "\2192";
  font-family: var(--hc-mono);
  font-size: 0.8rem;
  color: var(--hc-faint);
  transition: color 0.2s, transform 0.3s var(--hc-ease);
}

#neural-core ~ section .home-index a span {
  font-family: var(--hc-mono);
  font-size: 0.58rem;
  letter-spacing: 0.3em;
  color: var(--hc-faint);
}

#neural-core ~ section .home-index a:hover,
#neural-core ~ section .home-index a:focus-visible {
  color: var(--hc-lime);
  outline: none;
}

#neural-core ~ section .home-index a:hover::after,
#neural-core ~ section .home-index a:focus-visible::after {
  color: var(--hc-lime);
  transform: translateX(6px);
}

/* -------------------------------- 06 contact ------------------------------- */

#neural-core ~ .contact-section {
  margin-bottom: clamp(40px, 8vh, 96px);
}

#neural-core ~ .contact-section .home-contact {
  list-style: none;
  margin: 0;
  padding: 0;
}

#neural-core ~ .contact-section .home-contact li {
  display: grid;
  grid-template-columns: minmax(110px, 1fr) minmax(0, 3fr);
  align-items: baseline;
  gap: 16px;
  margin: 0;
  padding: 16px 0;
  border-bottom: 1px solid var(--hc-line);
}

#neural-core ~ .contact-section .home-contact span {
  font-family: var(--hc-mono);
  font-size: 0.6rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--hc-faint);
}

#neural-core ~ .contact-section .home-contact a {
  font-family: var(--hc-display);
  font-size: clamp(1.05rem, 2.2vw, 1.6rem);
  line-height: 1.2;
  color: var(--hc-fg);
  text-decoration: none;
  overflow-wrap: anywhere;
  transition: color 0.2s;
}

#neural-core ~ .contact-section .home-contact a:hover,
#neural-core ~ .contact-section .home-contact a:focus-visible {
  color: var(--hc-lime);
  outline: none;
}

/* ------------------------------ scroll reveals ----------------------------- */
/* Builds on the site reveal (default.html adds .ts-reveal / .ts-in): chapter
   titles and the profile arrive with a short blur-to-sharp settle. */

body.ts-reveal-ready #neural-core ~ .content-section > .section-title.ts-reveal {
  opacity: 0;
  transform: translateY(26px);
  filter: blur(8px);
  transition: opacity 0.9s var(--hc-ease), transform 0.9s var(--hc-ease), filter 0.9s var(--hc-ease);
}

body.ts-reveal-ready #neural-core ~ .content-section > .section-title.ts-reveal.ts-in {
  opacity: 1;
  transform: none;
  filter: none;
}

/* The profile staggers its parts instead of moving as one block. */
body.ts-reveal-ready #neural-core ~ .hero.ts-reveal {
  opacity: 1;
  transform: none;
}

body.ts-reveal-ready #neural-core ~ .hero.ts-reveal > * {
  opacity: 0;
  transform: translateY(24px);
  filter: blur(6px);
  transition: opacity 1s var(--hc-ease), transform 1s var(--hc-ease), filter 1s var(--hc-ease);
}

body.ts-reveal-ready #neural-core ~ .hero.ts-reveal.ts-in > * {
  opacity: 1;
  transform: none;
  filter: none;
}

body.ts-reveal-ready #neural-core ~ .hero.ts-reveal.ts-in > .home-handoff-title { transition-delay: 0.08s; }
body.ts-reveal-ready #neural-core ~ .hero.ts-reveal.ts-in > .hero-figure { transition-delay: 0.18s; }
body.ts-reveal-ready #neural-core ~ .hero.ts-reveal.ts-in > .hero-content { transition-delay: 0.32s; }

/* --------------------------------- tablet ---------------------------------- */

@media (max-width: 1000px) {
  #neural-core ~ .hero {
    grid-template-columns: minmax(180px, 240px) minmax(0, 1fr);
  }

  #neural-core ~ section .home-index {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* --------------------------------- mobile ---------------------------------- */
/* One column, composed for a phone: name first, then a cropped portrait,
   then the statement, disciplines and links. */

@media (max-width: 680px) {
  /* Flex column (not grid) so the desktop named areas cannot leak into
     implicit tracks once .hero-content dissolves via display: contents. */
  #neural-core ~ .hero {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  #neural-core ~ .hero > *,
  #neural-core ~ .hero .hero-content > * {
    order: 3;
  }

  #neural-core ~ .hero > .home-kicker,
  #neural-core ~ .hero > .home-handoff-title {
    order: 0;
  }

  #neural-core ~ .hero > .hero-content {
    display: contents;
  }

  #neural-core ~ .hero .hero-content h1 {
    order: 1;
    font-size: clamp(2.3rem, 12.5vw, 3.4rem);
  }

  #neural-core ~ .hero > .hero-figure {
    order: 2;
    margin-top: 24px;
    width: min(260px, 72%);
  }

  #neural-core ~ .hero .hero-photo {
    aspect-ratio: 1 / 1;
  }

  #neural-core ~ .hero .social-link {
    width: 44px;
    height: 44px;
  }

  #neural-core ~ section .home-index {
    grid-template-columns: minmax(0, 1fr);
  }

  #neural-core ~ section .home-index a {
    flex-direction: row;
    align-items: baseline;
    gap: 16px;
    padding: 16px 0;
  }

  #neural-core ~ section .home-index a::after {
    margin-left: auto;
  }

  #neural-core ~ .contact-section .home-contact li {
    grid-template-columns: minmax(0, 1fr);
    gap: 8px;
  }
}

/* ----------------------------- reduced motion ------------------------------ */

@media (prefers-reduced-motion: reduce) {
  body.ts-reveal-ready #neural-core ~ section .ts-reveal,
  body.ts-reveal-ready #neural-core ~ section.ts-reveal,
  body.ts-reveal-ready #neural-core ~ section.ts-reveal > * {
    opacity: 1 !important;
    transform: none !important;
    filter: none !important;
    transition: none !important;
  }
}