/* ============================================================
   Editorial Grid — Akira Kawabata HP
   Direction A. Tokens + components per the frontend handoff spec.
   Quiet, modern, Muji-adjacent: white paper, ink, no accent color.
   ============================================================ */

:root {
  /* Color (§03.1) */
  --bg: #FFFFFF;        /* page surface — the only true white */
  --card: #F6F4EF;      /* paper thumbnails, abstract tag chips */
  --hairline: #E6E6E6;  /* dividers, inactive button borders */
  --faint: #9C9C9C;     /* section numbers, eyebrow labels */
  --mute: #6B6B6B;      /* secondary body text, metadata */
  --ink: #141414;       /* primary text & key strokes */

  /* Type (§03.2) */
  --sans: "Inter Tight", Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "Geist Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, monospace;

  /* Spacing scale (§03.3) — 4-based */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 14px;
  --space-4: 24px;
  --space-5: 32px;
  --space-6: 48px;   /* main grid column gap */
  --space-7: 64px;   /* page horizontal margin */
  --space-8: 84px;   /* hero vertical padding */

  --maxw: 1180px;
  --gutter: var(--space-7);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15.5px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

img { display: block; max-width: 100%; }
a { color: inherit; }

.mono { font-family: var(--mono); }

/* Focus — never remove without replacement (§07) */
a:focus-visible,
button:focus-visible {
  outline: 1px solid var(--ink);
  outline-offset: 2px;
}

/* Page container (§04.1) */
.eg-wrap {
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* Root: positioning context for the hover preview popover */
.eg-root { position: relative; }

/* ---------- Top nav (§05.1) ---------- */
.eg-top {
  border-bottom: 1px solid var(--hairline);
  background: var(--bg);
}
.eg-top-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 26px;
  gap: 24px;
}
.eg-crest {
  display: inline-flex;
  align-items: baseline;
  gap: 14px;
}
.eg-mark {
  width: 22px;
  height: 22px;
  background: var(--ink);
  color: #fff;
  display: grid;
  place-items: center;
  font-size: 11px;
  font-weight: 500;
  flex: none;
  align-self: center;
}
.eg-crest-name {
  font-size: 13.5px;
  font-weight: 500;
  letter-spacing: -.005em;
  text-decoration: none;
}
.eg-nav {
  display: flex;
  gap: 28px;
  font-size: 13px;
}
.eg-link {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--hairline);
  padding-bottom: 1px;
}
.eg-link:hover { border-bottom-color: var(--ink); }
.eg-link.is-active { border-bottom-color: var(--ink); }

/* ---------- Hero (§04.3 / §05.2) ---------- */
.eg-hero {
  padding-block: var(--space-8) 80px;
  display: grid;
  grid-template-columns: 180px 1fr 1fr;
  column-gap: var(--space-6);
  row-gap: 40px;
  align-items: start;
  grid-template-areas: ".  profile interests";
}
.eg-hero-profile { grid-area: profile; }
.eg-hero-interests { grid-area: interests; }

/* Avatar removed for now; left rail kept empty to preserve grid alignment.
   Restore by re-adding .eg-hero-avatar to eg-hero.html, mapping the "."
   cell back to "avatar", and using the rules below. */
.eg-hero-avatar { grid-area: avatar; }
.eg-avatar {
  width: 140px;
  height: 140px;
  object-fit: cover;
  border-radius: 0;
  filter: saturate(.95);
}

.eg-eyebrow {
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--faint);
  margin-bottom: 18px;
}

.eg-name {
  font-size: 56px;
  line-height: 1.02;
  font-weight: 500;
  letter-spacing: -.025em;
  margin: 0 0 24px;
  text-wrap: balance;
}

.eg-about {
  font-size: 15.5px;
  line-height: 1.55;
  color: var(--ink);
  max-width: 460px;
}
/* Inline prose links — hairline underline that darkens on hover */
.eg-about a,
.eg-award-row a {
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  text-decoration-color: var(--faint);
  transition: text-decoration-color .2s ease;
}
.eg-about a:hover,
.eg-award-row a:hover { text-decoration-color: var(--ink); }

.eg-meta {
  margin-top: 24px;
  font-size: 13.5px;
  color: var(--mute);
  display: grid;
  grid-template-columns: auto 1fr;
  column-gap: 18px;
  row-gap: 6px;
}
.eg-meta dt { color: var(--mute); margin: 0; }
.eg-meta dd { color: var(--ink); margin: 0; }
.eg-meta dd.mono { font-family: var(--mono); font-size: 12.5px; }

.eg-interests {
  list-style: none;
  padding: 0;
  margin: 0;
}
.eg-interests li {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 14px 0;
  border-top: 1px solid var(--hairline);
  font-size: 19px;
  letter-spacing: -.005em;
}
.eg-interests li:first-child { border-top: 1px solid var(--ink); }
.eg-interests li .num {
  font-size: 11px;
  color: var(--faint);
  font-variant-numeric: tabular-nums;
}
.eg-interests li .label { flex: 1; }
/* trailing closing divider */
.eg-interests::after {
  content: "";
  display: block;
  border-top: 1px solid var(--hairline);
}

.eg-ctas {
  margin-top: 36px;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.eg-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border: 1px solid var(--hairline);
  font-size: 12.5px;
  text-decoration: none;
  color: var(--ink);
}
.eg-btn:hover { border-color: var(--ink); }
.eg-btn--primary { border-color: var(--ink); }

/* ---------- Section scaffold (§04.2 / §05.3) ---------- */
.eg-section {
  border-top: 1px solid var(--hairline);
  padding-block: 56px 40px;
  display: grid;
  grid-template-columns: 180px 1fr;
  column-gap: var(--space-6);
}
.eg-sec-num {
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--faint);
  margin-bottom: 8px;
}
.eg-sec-title {
  font-size: 22px;
  font-weight: 500;
  letter-spacing: -.01em;
  color: var(--ink);
  margin: 0;
}

/* ---------- News / Awards rows (§05.5) ---------- */
.eg-rows {
  list-style: none;
  padding: 0;
  margin: 0;
}
.eg-news-row {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 32px;
  padding: 16px 0;
  border-top: 1px solid var(--hairline);
  font-size: 15.5px;
  line-height: 1.5;
}
.eg-news-row:first-child { border-top: none; }
.eg-news-row .date {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--mute);
}
.eg-award-row {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 24px;
  padding: 14px 0;
  border-top: 1px solid var(--hairline);
  font-size: 15px;
  line-height: 1.55;
}
.eg-award-row:first-child { border-top: none; }
.eg-award-row .year {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--mute);
}

/* ---------- Publications grid (§04.4 / §05.4) ---------- */
.eg-pubs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  column-gap: 28px;
  row-gap: 40px;
}
.eg-pub {
  display: block;
  text-decoration: none;
  color: var(--ink);
  position: relative;
}
.eg-pub-thumb {
  width: 100%;
  aspect-ratio: 4 / 3;
  background: var(--card);
  overflow: hidden;
  margin-bottom: 16px;
}
.eg-pub-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(.85);
  transition: transform 600ms cubic-bezier(.2,.7,.2,1);
}
.eg-pub:hover .eg-pub-thumb img { transform: scale(1.03); }
.eg-pub-meta {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--mute);
  margin-bottom: 8px;
}
.eg-pub-title {
  font-size: 19px;
  line-height: 1.3;
  font-weight: 500;
  letter-spacing: -.005em;
  margin-bottom: 10px;
  text-wrap: balance;
}
.eg-pub-authors {
  font-size: 13.5px;
  color: var(--mute);
  line-height: 1.5;
}
.eg-pub-authors strong { color: var(--ink); font-weight: 500; }

/* Inline abstract — keyboard/touch fallback for the hover preview (§06.1, §07) */
.eg-pub-abstract {
  display: none;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--hairline);
  font-size: 13px;
  line-height: 1.55;
}
.eg-pub:focus-visible .eg-pub-abstract,
.eg-pub:focus-within .eg-pub-abstract { display: block; }
.eg-pub-abstract .eyebrow {
  font-size: 10.5px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--faint);
  margin-bottom: 8px;
}
.eg-tags {
  margin-top: 14px;
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
.eg-tags span {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .04em;
  padding: 3px 8px;
  background: var(--card);
  color: var(--mute);
}

.eg-pubs-more {
  margin-top: 32px;
  font-size: 12.5px;
  color: var(--mute);
}

/* ---------- Experience + Education (§05.6) ---------- */
.eg-exp {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
}
.eg-col-label {
  font-size: 11px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--faint);
  margin-bottom: 12px;
}
.eg-item {
  padding: 12px 0;
  border-top: 1px solid var(--hairline);
}
.eg-item:first-of-type { border-top: 1px solid var(--ink); }
.eg-item .span {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--mute);
}
.eg-item .role {
  font-size: 16px;
  margin-top: 4px;
  font-weight: 500;
}
.eg-item .org {
  font-size: 14px;
  color: var(--mute);
}

/* ---------- Footer (§05.8) ---------- */
.eg-footer {
  border-top: 1px solid var(--hairline);
  padding-block: 28px 36px;
  font-size: 11px;
  color: var(--faint);
  display: flex;
  justify-content: space-between;
  letter-spacing: .06em;
  text-transform: uppercase;
  gap: 16px;
}

/* ---------- Hover preview popover (§05.7 / §06.1) ---------- */
.eg-preview {
  position: absolute;
  width: 320px;
  background: #fff;
  border: 1px solid var(--ink);
  padding: 20px;
  box-shadow: 0 18px 40px -22px rgba(0,0,0,.25);
  z-index: 50;
  pointer-events: none;
  font-size: 13px;
  line-height: 1.55;
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 160ms cubic-bezier(.2,.7,.2,1),
              transform 160ms cubic-bezier(.2,.7,.2,1);
}
.eg-preview.is-visible { opacity: 1; transform: none; }
.eg-preview .eyebrow {
  font-size: 10.5px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--faint);
  margin-bottom: 8px;
}
.eg-preview .tldr { color: var(--ink); }

/* ---------- Page header (Publications / sub-pages) ---------- */
.eg-page-head {
  padding-block: var(--space-8) 40px;
}
.eg-page-head h1 {
  font-size: 44px;
  line-height: 1.04;
  font-weight: 500;
  letter-spacing: -.02em;
  margin: 8px 0 0;
  text-wrap: balance;
}

/* ---------- Scroll reveal (§06.2) — only when JS is on ---------- */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 700ms cubic-bezier(.2,.7,.2,1),
              transform 700ms cubic-bezier(.2,.7,.2,1);
}
.js [data-reveal].is-in {
  opacity: 1;
  transform: none;
}

/* ============================================================
   Responsive (§04.5)
   ============================================================ */

/* Tablet 768–1023px */
@media (max-width: 1023px) {
  :root { --gutter: 40px; }
  .eg-section { grid-template-columns: 160px 1fr; }
  .eg-pubs { grid-template-columns: 1fr 1fr; }
  .eg-hero {
    grid-template-columns: 140px 1fr;
    grid-template-areas:
      ".      profile"
      "interests interests";
  }
}

/* Mobile < 768px */
@media (max-width: 767px) {
  :root { --gutter: 24px; }
  .eg-name { font-size: 44px; }
  .eg-section {
    grid-template-columns: 1fr;
    row-gap: 16px;
  }
  .eg-hero {
    grid-template-columns: 1fr;
    grid-template-areas:
      "profile"
      "interests";
  }
  .eg-pubs { grid-template-columns: 1fr; }
  .eg-exp { grid-template-columns: 1fr; row-gap: 24px; }
  .eg-top-inner { flex-wrap: wrap; gap: 14px; }
  .eg-footer { flex-direction: column; gap: 6px; }
}

/* ============================================================
   Reduced motion (§06, §07)
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  .eg-pub-thumb img { transition: none; }
  .eg-pub:hover .eg-pub-thumb img { transform: none; }
  .eg-preview { transition: none; transform: none; }
  .js [data-reveal] { opacity: 1; transform: none; transition: none; }
}