/* ==========================================================================
   Yuxin Lin — Personal Site
   Navy monochrome foundation · brand blue & yellow · Swiss typography · brutalist structure
   No glassmorphism. No gradients. No framework.
   --------------------------------------------------------------------------
   01 Tokens        06 Marquee
   02 Reset
   03 Utilities     08 Sections & rails
   04 Masthead      09 Publications
   05 Hero          10 Ledgers / timeline
                    11 Work page
                    12 Colophon
                    13 Motion & responsive
   ========================================================================== */

/* -- 01. Tokens ----------------------------------------------------------- */
:root {
  /* ground + ink */
  --paper:      #F3F2EE;
  --paper-2:    #E8E6E0;
  --ink:        #0B1533;   /* deep navy — the "black" of the system */
  --ink-2:      #2E3A5C;
  --ink-3:      #5A6382;

  /* brand pair, values unchanged from the previous site */
  --blue:       #2563EB;   /* structure & interaction */
  --accent:     #FFCA11;   /* highlighter — marks only, never body copy */

  --rule:       rgba(11,21,51,.16);
  --rule-2:     rgba(11,21,51,.34);

  --shadow:     9px 9px 0 var(--ink);
  --shadow-sm:  5px 5px 0 var(--ink);

  --font-display: 'Eras Bold ITC','Eras Demi ITC','Helvetica Neue',Helvetica,Arial,sans-serif;
  --font-text:    'Helvetica Neue',Helvetica,'Inter','PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;
  --font-mono:    ui-monospace,'SFMono-Regular','SF Mono',Menlo,Consolas,'Liberation Mono',monospace;

  --t-mega: clamp(3.1rem, 13.2vw, 11rem);
  --t-h2:   clamp(1.95rem, 4.4vw, 3.6rem);
  --t-h3:   clamp(1.25rem, 2vw, 1.7rem);
  --t-lede: clamp(1.05rem, 1.35vw, 1.4rem);
  --t-body: 1.0625rem;
  --t-small:.875rem;
  --t-micro:.6875rem;

  --pad:  clamp(1.15rem, 4.4vw, 4.25rem);
  --shell: 1600px;
  --gap:  clamp(1rem, 2.3vw, 2.3rem);
  --edge: clamp(1rem, 1.6vw, 1.4rem);
  --ease: cubic-bezier(.22,.68,.16,1);
}

/* -- 02. Reset ------------------------------------------------------------ */
*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-text);
  font-size: var(--t-body);
  line-height: 1.56;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, p, figure, blockquote, dl, dd { margin: 0; }
table { border-collapse: collapse; width: 100%; }

::selection { background: var(--accent); color: var(--ink); }
:focus-visible { outline: 3px solid var(--blue); outline-offset: 3px; }

.cjk { font-feature-settings: "trad"; }

/* Chinese copy: more leading, no negative tracking (CJK needs the breathing
   room that Eras' tight settings assume is Latin-only). */
html[lang="zh-Hans"] body { line-height: 1.7; letter-spacing: .012em; }
html[lang="zh-Hans"] .manifesto__p:first-child::first-letter { font-size: 2.7em; }
html[lang="zh-Hans"] .entry__title,
html[lang="zh-Hans"] .ledger__title,
html[lang="zh-Hans"] .edu__degree,
html[lang="zh-Hans"] .rail__title,
html[lang="zh-Hans"] .colophon__heading,
html[lang="zh-Hans"] .work__title,
html[lang="zh-Hans"] .pub-featured__title { letter-spacing: 0; }
html[lang="zh-Hans"] .micro { letter-spacing: .16em; }

/* Paper grain — tactile, not a gradient */
.grain {
  position: fixed; inset: 0; z-index: 300; pointer-events: none;
  opacity: .045; mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='180' height='180'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/></filter><rect width='180' height='180' filter='url(%23n)'/></svg>");
}

/* -- 03. Utilities -------------------------------------------------------- */
.shell { max-width: var(--shell); margin: 0 auto; padding: 0 var(--pad); }

.grid { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: var(--gap); }

.micro {
  font-family: var(--font-mono);
  font-size: var(--t-micro);
  letter-spacing: .2em;
  text-transform: uppercase;
  line-height: 1.4;
}

/* rich-text marks, only reachable through Site.out()'s whitelist */
del {
  text-decoration: line-through;
  text-decoration-thickness: .14em;
  text-decoration-color: var(--blue);
}
del strong, strong del { color: var(--blue); }
mark { background: var(--accent); color: var(--ink); padding: 0 .12em; }
code { font-family: var(--font-mono); font-size: .88em; }
.prose a, .fact__value a, .entry__summary a, .interest__gloss a, .edu__note a {
  border-bottom: 2px solid var(--blue);
}
.prose a:hover, .entry__summary a:hover, .interest__gloss a:hover, .edu__note a:hover {
  background: var(--accent); box-shadow: 0 0 0 .12em var(--accent);
}

.self {
  background: var(--accent);
  box-shadow: 0 0 0 .12em var(--accent);
  font-weight: 700;
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
}

.skip {
  position: absolute; left: -9999px; top: 0; z-index: 400;
  background: var(--ink); color: var(--paper); padding: .75rem 1.25rem;
}
.skip:focus { left: .5rem; top: .5rem; }

/* -- 04. Masthead --------------------------------------------------------- */
.progress {
  position: fixed; inset: 0 0 auto 0; z-index: 90; height: 3px;
  background: transparent; pointer-events: none;
}
.progress__bar {
  display: block; height: 100%; width: 100%;
  background: var(--blue);
  transform: scaleX(0); transform-origin: 0 50%;
}

.masthead {
  position: sticky; top: 0; z-index: 80;
  display: flex; align-items: center; gap: clamp(.9rem, 3vw, 2.6rem);
  padding: .7rem var(--pad);
  background: var(--paper);
  border-bottom: 2px solid var(--ink);
}

.masthead__brand { display: flex; align-items: center; gap: .7rem; }
.masthead__mono {
  display: grid; place-items: center;
  width: 2.15rem; height: 2.15rem;
  background: var(--accent); border: 2px solid var(--ink);
  box-shadow: 3px 3px 0 var(--ink);
  font-family: var(--font-display); font-size: .8rem; letter-spacing: .02em;
  transition: transform .18s var(--ease), box-shadow .18s var(--ease);
}
.masthead__brand:hover .masthead__mono { transform: translate(-2px,-2px); box-shadow: 5px 5px 0 var(--ink); }

.masthead__name {
  display: block;
  font-family: var(--font-display); font-size: 1.05rem;
  letter-spacing: .02em; text-transform: uppercase; line-height: 1;
}
.masthead__readout { color: var(--ink-3); white-space: nowrap; }
.masthead__clock { display: flex; align-items: center; gap: .5rem; color: var(--ink-2); }

/* Language switch — segmented, brutalist, no rounded pill */
.lang {
  display: flex; border: 2px solid var(--ink); background: var(--paper);
  box-shadow: 3px 3px 0 var(--ink);
}
.lang__btn {
  padding: .38rem .62rem;
  font-family: var(--font-mono); font-size: var(--t-micro);
  letter-spacing: .14em; line-height: 1;
  color: var(--ink-2);
  transition: background .16s var(--ease), color .16s var(--ease);
}
.lang__btn + .lang__btn { border-left: 2px solid var(--ink); }
.lang__btn:hover { background: var(--paper-2); }
.lang__btn.is-on { background: var(--blue); color: #fff; font-weight: 700; }
.lang__btn:focus-visible { outline-offset: -3px; }

.masthead__nav { margin-left: auto; display: flex; align-items: center; gap: clamp(.85rem, 2vw, 1.9rem); }
.navlink {
  position: relative; padding: .3rem 0;
  font-family: var(--font-mono); font-size: var(--t-micro);
  letter-spacing: .2em; text-transform: uppercase;
}
.navlink::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 2px;
  background: var(--blue); transform: scaleX(0); transform-origin: 0 50%;
  transition: transform .28s var(--ease);
}
.navlink:hover::after, .navlink:focus-visible::after, .navlink[aria-current="page"]::after { transform: scaleX(1); }
.navlink[aria-current="page"] { font-weight: 700; }

.masthead__dot {
  width: .5rem; height: .5rem; background: var(--accent);
  border: 1px solid var(--ink); border-radius: 50%;
  animation: pulse 2.4s var(--ease) infinite;
}
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: .25; } }

@media (max-width: 1180px) { .masthead__readout { display: none; } }
@media (max-width: 700px) {
  .masthead__clock, .masthead__readout { display: none; }
  .masthead { gap: .8rem; }
}
@media (max-width: 380px) {
  .lang { box-shadow: none; }
  .lang__btn { padding: .38rem .45rem; letter-spacing: .06em; }
}

/* -- 05. Hero ------------------------------------------------------------- */
.hero { padding: clamp(2rem, 5vw, 4rem) 0 0; }

.hero__top {
  grid-column: 1 / -1;
  display: flex; flex-wrap: wrap; align-items: baseline; gap: .75rem 1.5rem;
  padding-bottom: .8rem; border-bottom: 1px solid var(--rule);
}
.work__eyebrow {
  grid-column: 1 / -1;
  display: flex; justify-content: space-between; gap: 1rem;
  padding-bottom: .8rem; border-bottom: 1px solid var(--rule);
}
.hero__top .micro { color: var(--ink-3); }
.hero__top .micro:first-child { color: var(--ink); }
.hero__edition { margin-left: auto; color: var(--blue); }

.hero__grid { padding-top: clamp(1.4rem, 3.4vw, 2.8rem); }

.hero__title {
  grid-column: 1 / span 9;
  font-family: var(--font-display); font-weight: 700;
  font-size: var(--t-mega); line-height: .82; letter-spacing: -.035em;
  text-transform: uppercase;
}
.hero__line { display: block; }
.hero__line--indent { padding-left: .11em; }
/* accent chip that closes the display lockup */
.hero__chip {
  display: inline-block; vertical-align: .3em;
  font-family: var(--font-text); font-weight: 500;
  font-size: .17em; letter-spacing: .13em; line-height: 1;
  text-transform: uppercase;
  background: var(--accent); color: var(--ink);
  padding: .5em .55em .45em;
  margin-left: .3em; border: 2px solid var(--ink);
}

.hero__figure {
  grid-column: 10 / span 3; grid-row: 2 / span 2;
  align-self: start; margin-top: clamp(1.25rem, 3vw, 2.6rem);
}
.hero__portrait {
  width: 100%; aspect-ratio: 1 / 1; object-fit: cover;
  border: 2px solid var(--ink); box-shadow: var(--shadow);
  transition: transform .5s var(--ease);
}
.hero__figure:hover .hero__portrait { transform: translate(-3px,-3px); }
.hero__figcaption { margin-top: .7rem; color: var(--ink-3); }

.hero__lede {
  grid-column: 1 / span 5; grid-row: 3;
  margin-top: clamp(1.6rem, 3.5vw, 3rem);
  font-size: var(--t-lede); line-height: 1.46; letter-spacing: -.005em;
  text-wrap: pretty;
}
.hero__lede strong { font-weight: 700; }

.hero__facts {
  grid-column: 6 / span 4; grid-row: 3;
  margin-top: clamp(1.6rem, 3.5vw, 3rem);
  display: grid; grid-template-columns: auto minmax(0, 1fr);
  column-gap: 1.15rem; align-items: baseline;
  border-top: 1px solid var(--rule);
}
.hero__facts > dt, .hero__facts > dd { padding: .55rem 0; border-bottom: 1px solid var(--rule); }
.fact__label { color: var(--ink-3); white-space: nowrap; }
.fact__value { font-weight: 500; }
.fact__value::before {
  content: ""; display: inline-block; width: .55rem; height: .55rem;
  background: var(--accent); border: 1px solid var(--ink);
  margin-right: .5rem; vertical-align: .08em;
}
a.fact__value { border-bottom: 1px solid var(--rule-2); }
a.fact__value:hover { background: var(--accent); box-shadow: 0 0 0 2px var(--accent); }

/* -- 06. Marquee ---------------------------------------------------------- */
.marquee {
  margin-top: clamp(2.2rem, 5vw, 4rem);
  background: var(--blue); color: #fff;
  border-top: 2px solid var(--ink); border-bottom: 2px solid var(--ink);
  overflow: hidden; padding: .85rem 0;
}
.marquee__track {
  display: flex; width: max-content;
  animation: slide 38s linear infinite;
}
.marquee:hover .marquee__track { animation-play-state: paused; }
.marquee__group { display: flex; align-items: center; flex: 0 0 auto; }
.marquee__item {
  font-family: var(--font-display); font-size: clamp(1.1rem, 2.1vw, 1.9rem);
  text-transform: uppercase; letter-spacing: .01em; white-space: nowrap;
  padding: 0 .55em;
}
.marquee__item.is-alt { color: var(--accent); }
.marquee__sep { color: rgba(255,255,255,.5); font-size: clamp(.8rem,1.4vw,1.1rem); }
@keyframes slide { from { transform: translateX(0); } to { transform: translateX(-50%); } }

/* -- 08. Sections & rails ------------------------------------------------- */
.section { border-top: 2px solid var(--ink); }

.section__inner { padding-top: clamp(2rem, 4.5vw, 4rem); padding-bottom: clamp(2.4rem, 5vw, 4.5rem); }

.section__rail { grid-column: 1 / span 3; align-self: start; position: sticky; top: 5.2rem; }
.rail__index {
  font-family: var(--font-display); font-size: clamp(2.4rem, 5vw, 4rem);
  line-height: .85; letter-spacing: -.04em; color: transparent;
  -webkit-text-stroke: 2px var(--ink);
}
.rail__title {
  margin-top: .55rem;
  font-family: var(--font-display); font-weight: 700;
  font-size: var(--t-h2); line-height: .94; letter-spacing: -.025em;
  text-transform: uppercase; text-wrap: balance;
}
.rail__sub { margin-top: .6rem; color: var(--ink-3); max-width: 22ch; }
.rail__tick { width: 2.4rem; height: .45rem; background: var(--accent); margin-top: 1.1rem; border: 1px solid var(--ink); }

.section__main { grid-column: 5 / span 8; }

.section__headline {
  font-family: var(--font-display); font-weight: 700;
  font-size: var(--t-h3); line-height: 1.04; letter-spacing: -.02em;
}

/* Manifesto */
.manifesto { max-width: 62ch; }
.manifesto__p {
  font-size: var(--t-lede); line-height: 1.46; letter-spacing: -.004em;
  text-wrap: pretty;
}
.manifesto__p + .manifesto__p { margin-top: .5em; }
.manifesto__p:first-child::first-letter {
  float: left; font-family: var(--font-display); font-weight: 700;
  font-size: 3.05em; line-height: .78; padding: .06em .12em 0 0;
  color: var(--ink);
}

/* Interests */
.interests { margin-top: clamp(1.8rem, 3.4vw, 2.6rem); border-top: 2px solid var(--ink); }
.interests__head { display: flex; align-items: baseline; gap: 1rem; padding-top: 1rem; }
.interests__list { margin-top: .55rem; }
.interest {
  display: grid;
  grid-template-columns: 2.8rem minmax(0, 14rem) minmax(0, 1fr);
  column-gap: var(--gap);
  align-items: baseline; padding: .7rem 0;
  border-bottom: 1px solid var(--rule);
  transition: background .25s var(--ease), padding .25s var(--ease);
}
.interest:hover { background: var(--ink); color: var(--paper); padding-left: var(--edge); padding-right: var(--edge); }
.interest:hover .interest__gloss { color: var(--paper-2); }
.interest:hover .interest__no { color: var(--accent); }
.interest__no { font-family: var(--font-mono); font-size: var(--t-micro); color: var(--ink-3); }
.interest__term {
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(1rem, 1.45vw, 1.25rem);
  line-height: 1.05; letter-spacing: -.01em; text-transform: uppercase;
}
.interest__gloss { color: var(--ink-2); }

/* -- 09. Publications ----------------------------------------------------- */
.pub-featured {
  display: grid; grid-template-columns: repeat(12, minmax(0,1fr));
  column-gap: var(--gap); align-items: start;
  border: 2px solid var(--ink); box-shadow: var(--shadow);
  background: var(--paper-2);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}
.pub-featured:hover { transform: translate(-4px,-4px); box-shadow: 13px 13px 0 var(--ink); }
.pub-featured__media { grid-column: 1 / span 5; border-right: 2px solid var(--ink); }
.pub-featured__img { width: 100%; height: 100%; min-height: 100%; object-fit: cover; aspect-ratio: 16 / 11; }
.pub-featured__body { grid-column: 6 / span 7; padding: clamp(1.2rem, 2.4vw, 2.2rem); }
.pub-featured__flag {
  display: inline-flex; align-items: center; gap: .5rem;
  background: var(--blue); color: #fff;
  padding: .35rem .7rem;
}
.pub-featured__title {
  margin-top: 1rem;
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(1.4rem, 2.5vw, 2.2rem); line-height: 1.0;
  letter-spacing: -.025em; text-wrap: balance;
}
.pub-featured__authors { margin-top: .9rem; color: var(--ink-2); font-size: var(--t-small); }
.pub-featured__venue { margin-top: .9rem; padding-top: .8rem; border-top: 1px solid var(--rule-2); }
.pub-featured__venue strong { font-family: var(--font-display); font-size: var(--t-h3); letter-spacing: -.01em; }
.pub-featured__venue span { display: block; color: var(--ink-3); font-size: var(--t-small); margin-top: .25rem; }
.pub-featured__cta {
  display: inline-flex; align-items: center; gap: .55rem; margin-top: 1.3rem;
  background: var(--blue); border: 2px solid var(--ink); box-shadow: var(--shadow-sm);
  color: #fff; padding: .55rem .95rem;
  transition: transform .18s var(--ease), box-shadow .18s var(--ease);
}
.pub-featured__cta:hover { transform: translate(-2px,-2px); box-shadow: 7px 7px 0 var(--ink); }
.pub-featured__cta .arrow { transition: transform .18s var(--ease); }
.pub-featured__cta:hover .arrow { transform: translateX(3px); }

.tags { display: flex; flex-wrap: wrap; gap: .4rem; margin-top: 1rem; }
.tag {
  font-family: var(--font-mono); font-size: var(--t-micro); letter-spacing: .14em;
  text-transform: uppercase; padding: .3rem .55rem;
  border: 1px solid var(--rule-2); color: inherit; opacity: .82;
}
.pub__link:hover .tag, .pub__link:focus-visible .tag { border-color: rgba(243,242,238,.45); opacity: 1; }

.pub-list { margin-top: clamp(2rem, 4vw, 3.2rem); border-top: 2px solid var(--ink); }
.pub { border-bottom: 1px solid var(--rule); }
.pub__link {
  display: grid; grid-template-columns: 3.4rem minmax(0,1fr) auto;
  gap: var(--gap); align-items: start;
  padding: 1.15rem 0;
  transition: background .22s var(--ease), color .22s var(--ease), padding .22s var(--ease);
}
.pub__link:hover, .pub__link:focus-visible {
  background: var(--ink); color: var(--paper);
  padding-left: var(--edge); padding-right: var(--edge);
}
.pub__no { font-family: var(--font-mono); font-size: var(--t-small); color: var(--ink-3); padding-top: .35rem; }
.pub__link:hover .pub__no, .pub__link:focus-visible .pub__no { color: var(--accent); }
.pub__body { min-width: 0; }
.pub__title {
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(1.1rem, 1.7vw, 1.5rem); line-height: 1.06;
  letter-spacing: -.02em; text-wrap: balance;
}
.pub__authors { margin-top: .5rem; font-size: var(--t-small); color: var(--ink-2); }
.pub__link:hover .pub__authors, .pub__link:focus-visible .pub__authors { color: var(--paper-2); }
.pub__meta { text-align: right; display: flex; flex-direction: column; align-items: flex-end; gap: .5rem; padding-top: .2rem; }
.pub__venue { font-family: var(--font-display); font-size: var(--t-h3); line-height: 1; letter-spacing: -.01em; white-space: nowrap; }
.pub__rank {
  font-family: var(--font-mono); font-size: var(--t-micro); letter-spacing: .14em;
  border: 1px solid var(--rule-2); padding: .22rem .45rem; color: var(--ink-2);
}
.pub__link:hover .pub__rank, .pub__link:focus-visible .pub__rank { border-color: var(--accent); color: var(--accent); }
.pub__thumb {
  width: 4.2rem; height: 3.1rem; object-fit: cover;
  border: 1px solid var(--rule-2); margin-top: .15rem;
  filter: grayscale(1); transition: filter .3s var(--ease);
}
.pub__link:hover .pub__thumb { filter: grayscale(0); }

/* -- 10. Ledgers & timeline ----------------------------------------------- */
.ledger { border-top: 2px solid var(--ink); margin-top: clamp(1.6rem, 3vw, 2.4rem); }
.ledger__row {
  display: grid; gap: var(--gap); align-items: baseline;
  padding: 1.1rem 0; border-bottom: 1px solid var(--rule);
  transition: background .22s var(--ease), padding .22s var(--ease);
}
.ledger__row:hover { background: var(--ink); color: var(--paper); padding-left: var(--edge); padding-right: var(--edge); }

.ledger--patents .ledger__row { grid-template-columns: 4.6rem minmax(0,1fr) 15rem; }
.ledger--awards  .ledger__row { grid-template-columns: 4.6rem minmax(0,1fr) 11rem; }

.ledger__no { font-family: var(--font-mono); font-size: var(--t-small); color: var(--ink-3); }
.ledger__row:hover .ledger__no { color: var(--accent); }
.ledger__title {
  font-family: var(--font-display); font-weight: 700; font-size: var(--t-h3);
  line-height: 1.06; letter-spacing: -.02em;
}
.ledger__sub { margin-top: .35rem; font-size: var(--t-small); color: var(--ink-2); }
.ledger__row:hover .ledger__sub { color: var(--paper-2); }
.ledger__row:hover .ledger__title,
.ledger__row:hover .ledger__track { color: var(--paper); }
.ledger__side { text-align: right; }
.ledger__id { font-family: var(--font-mono); font-size: var(--t-small); letter-spacing: .02em; }
.ledger__kind {
  display: inline-block; margin-top: .45rem;
  font-family: var(--font-mono); font-size: var(--t-micro); letter-spacing: .16em;
  text-transform: uppercase; border: 1px solid var(--rule-2); padding: .22rem .5rem;
}
.ledger__row:hover .ledger__kind { border-color: var(--accent); color: var(--accent); }

.ledger__award { font-family: var(--font-display); font-size: var(--t-h3); line-height: 1; letter-spacing: -.01em; white-space: nowrap; }
.pub__note { margin-top: 1.1rem; color: var(--ink-3); }
.ledger__award small { display: block; font-family: var(--font-mono); font-size: var(--t-micro); letter-spacing: .14em; color: var(--ink-3); margin-top: .4rem; }
.ledger__row:hover .ledger__award small { color: var(--accent); }
.ledger__track { display: block; font-family: var(--font-text); font-weight: 400; font-size: var(--t-small); letter-spacing: 0; color: var(--ink-2); margin-top: .3rem; }

/* Education timeline */
.edu { margin-top: clamp(1.6rem, 3vw, 2.4rem); border-top: 2px solid var(--ink); }
.edu__item {
  display: grid; grid-template-columns: 4.6rem minmax(0,1fr);
  gap: var(--gap); padding: clamp(1.2rem, 2.4vw, 1.9rem) 0;
  border-bottom: 1px solid var(--rule);
}
.edu__years { font-family: var(--font-mono); font-size: var(--t-small); line-height: 1.5; color: var(--ink-3); }
.edu__years b { display: block; color: var(--ink); font-weight: 700; }
.edu__years i { display: block; font-style: normal; color: var(--ink-3); }
.edu__degree {
  font-family: var(--font-display); font-weight: 700; font-size: var(--t-h3);
  line-height: 1.04; letter-spacing: -.02em; text-transform: uppercase;
}
.edu__cjk { display: block; font-family: var(--font-text); font-weight: 400; font-size: var(--t-small); letter-spacing: .12em; color: var(--ink-3); margin-top: .45rem; }
.edu__inst { margin-top: .7rem; font-weight: 500; }
.edu__unit { color: var(--ink-3); font-size: var(--t-small); }
.edu__note { margin-top: .6rem; color: var(--ink-2); max-width: 48ch; text-wrap: pretty; }

/* -- 11. Work page -------------------------------------------------------- */
.work { padding-top: clamp(2.4rem, 5vw, 4.4rem); }
.work__grid { row-gap: clamp(1.6rem, 3.5vw, 2.6rem); }
.work__title {
  grid-column: 1 / span 9;
  font-family: var(--font-display); font-weight: 700;
  font-size: var(--t-mega); line-height: .82; letter-spacing: -.035em; text-transform: uppercase;
}
.work__intro { grid-column: 10 / span 3; align-self: end; color: var(--ink-2); font-size: var(--t-small); }
.work__intro b { display: block; font-family: var(--font-display); font-size: var(--t-h3); letter-spacing: -.01em; margin-bottom: .5rem; }

.entry { border-top: 2px solid var(--ink); padding-top: clamp(1.4rem, 3vw, 2.4rem); }
.entry__grid {
  display: grid; grid-template-columns: repeat(12, minmax(0,1fr));
  column-gap: var(--gap); row-gap: clamp(1.2rem, 3vw, 2rem); align-items: start;
}
.entry__meta { grid-column: 1 / span 2; }
.entry__index {
  font-family: var(--font-display); font-size: clamp(2rem, 3.6vw, 3rem);
  line-height: .85; letter-spacing: -.04em; color: transparent; -webkit-text-stroke: 2px var(--ink);
}
.entry__status { margin-top: .9rem; }
.chip {
  display: inline-block; font-family: var(--font-mono); font-size: var(--t-micro);
  letter-spacing: .16em; text-transform: uppercase;
  padding: .28rem .55rem; border: 1px solid var(--ink);
}
.chip--accent { background: var(--accent); }

.entry__media { grid-column: 3 / span 5; }
.entry__frame {
  position: relative; border: 2px solid var(--ink); box-shadow: var(--shadow);
  background: var(--paper-2); overflow: hidden;
}
.entry__frame img { width: 100%; height: 100%; object-fit: cover; aspect-ratio: var(--ratio, 4 / 3); }
.entry__frame--empty { aspect-ratio: 4 / 3; display: grid; place-items: center; }
.entry__frame--empty::before {
  content: ""; position: absolute; inset: 0;
  background-image: repeating-linear-gradient(135deg, var(--rule) 0 1px, transparent 1px 9px);
}
.entry__placeholder {
  position: relative; font-family: var(--font-display); font-size: clamp(1.6rem, 3vw, 2.6rem);
  letter-spacing: -.02em; text-transform: uppercase; text-align: center; line-height: 1;
}
.entry__placeholder span { display: block; font-family: var(--font-mono); font-size: var(--t-micro); letter-spacing: .2em; color: var(--ink-3); margin-top: .8rem; }

.entry__body { grid-column: 8 / span 5; }
.entry__title {
  font-family: var(--font-display); font-weight: 700;
  font-size: var(--t-h2); line-height: .96; letter-spacing: -.028em; text-transform: uppercase;
}
.entry__cjk { display: block; font-family: var(--font-text); font-weight: 400; font-size: .28em; letter-spacing: .28em; color: var(--ink-3); margin-top: .9rem; }
.entry__year { margin-top: .8rem; color: var(--ink-3); }
.entry__summary { margin-top: 1.1rem; font-size: var(--t-lede); line-height: 1.45; text-wrap: pretty; }
.entry__summary-cjk { margin-top: .8rem; color: var(--ink-3); font-size: var(--t-small); letter-spacing: .03em; }
.entry__tags { margin-top: 1.2rem; }
.entry__link {
  display: inline-flex; align-items: center; gap: .55rem; margin-top: 1.4rem;
  border-bottom: 2px solid var(--accent); padding-bottom: .2rem;
  transition: gap .2s var(--ease);
}
.entry__link:hover { gap: 1rem; }

/* -- 12. Colophon --------------------------------------------------------- */
.colophon { border-top: 2px solid var(--ink); background: var(--ink); color: var(--paper); }
.colophon__grid { padding-top: clamp(2.4rem, 5vw, 4rem); padding-bottom: clamp(2.4rem, 5vw, 4rem); row-gap: clamp(2rem, 4vw, 3rem); }
.colophon__title { grid-column: 1 / span 4; }
.colophon__kicker { color: var(--accent); }
.colophon__heading {
  font-family: var(--font-display); font-weight: 700;
  font-size: var(--t-h2); line-height: .95; letter-spacing: -.025em; text-transform: uppercase;
  margin-top: .8rem; text-wrap: balance;
}
.colophon__email {
  display: inline-block; margin-top: 1.4rem;
  font-family: var(--font-display); font-size: clamp(1.1rem, 2.2vw, 1.7rem);
  border-bottom: 3px solid var(--accent); padding-bottom: .15rem; letter-spacing: -.01em;
  transition: background .2s var(--ease), color .2s var(--ease);
}
.colophon__email:hover { background: var(--accent); color: var(--ink); }
.colophon__links { grid-column: 6 / span 4; }
.colophon__link {
  display: flex; align-items: baseline; justify-content: space-between; gap: 1rem;
  padding: .85rem 0; border-bottom: 1px solid rgba(243,242,238,.22);
  transition: padding .2s var(--ease), color .2s var(--ease);
}
.colophon__link:hover { padding-left: var(--edge); color: var(--accent); }
.colophon__link span:last-child { font-family: var(--font-mono); font-size: var(--t-micro); letter-spacing: .12em; color: rgba(243,242,238,.5); }
.colophon__link:hover span:last-child { color: var(--accent); }
.colophon__mark { grid-column: 11 / span 2; text-align: right; }
.colophon__mark b {
  display: block; font-family: var(--font-display); font-weight: 700;
  font-size: clamp(2rem, 4vw, 3.2rem); line-height: .9; letter-spacing: -.02em;
  writing-mode: vertical-rl; margin-left: auto;
}
.colophon__mark span { display: block; color: rgba(243,242,238,.5); margin-top: 1rem; }
.colophon__base {
  border-top: 1px solid rgba(243,242,238,.22);
  padding: 1.1rem 0; display: flex; flex-wrap: wrap; gap: .6rem 1.6rem;
  align-items: center; justify-content: space-between;
}
.colophon__base p { color: rgba(243,242,238,.55); max-width: 60ch; }
.totop { display: inline-flex; align-items: center; gap: .5rem; color: var(--accent); }
.totop:hover { text-decoration: underline; text-underline-offset: .3em; }

/* -- 13. Motion & responsive ---------------------------------------------- */
.js [data-reveal] { opacity: 0; transform: translateY(20px); }
.js [data-reveal].is-in { opacity: 1; transform: none; transition: opacity .75s var(--ease), transform .75s var(--ease); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js [data-reveal] { opacity: 1 !important; transform: none !important; transition: none !important; }
  .marquee__track { animation: none; }
  .masthead__dot { animation: none; }
  * { transition-duration: .01ms !important; }
}

@media (max-width: 1180px) {
  .hero__title { grid-column: 1 / span 10; }
  .hero__figure { grid-column: 11 / span 2; grid-row: 2; }
  .hero__lede { grid-column: 1 / span 6; grid-row: 3; }
  .hero__facts { grid-column: 7 / span 6; grid-row: 3; }
  .work__title { grid-column: 1 / span 10; }
  .work__intro { grid-column: 11 / span 2; }
}

@media (max-width: 980px) {
  .section__rail { grid-column: 1 / span 12; position: static; margin-bottom: clamp(1.4rem, 3vw, 2rem); }
  .section__main { grid-column: 1 / span 12; }
  .entry__meta { grid-column: 1 / span 12; display: flex; align-items: baseline; gap: 1rem; }
  .entry__media { grid-column: 1 / span 12; }
  .entry__body { grid-column: 1 / span 12; }
  .colophon__title { grid-column: 1 / span 12; }
  .colophon__links { grid-column: 1 / span 7; }
  .colophon__mark { grid-column: 9 / span 4; }
  .colophon__mark b { writing-mode: horizontal-tb; margin-left: 0; }
}

@media (max-width: 1024px) {
  .interest { grid-template-columns: 2.6rem minmax(0, 11rem) minmax(0, 1fr); }
}

@media (max-width: 720px) {
  .interest { grid-template-columns: 2.4rem minmax(0, 1fr); }
  .interest__term { grid-column: 2; }
  .interest__gloss { grid-column: 2; margin-top: .2rem; }
}

@media (max-width: 820px) {
  .pub-featured__media { grid-column: 1 / span 12; border-right: 0; border-bottom: 2px solid var(--ink); }
  .pub-featured__body { grid-column: 1 / span 12; }
  .ledger--patents .ledger__row, .ledger--awards .ledger__row { grid-template-columns: 3.2rem minmax(0,1fr); }
  .ledger__side { grid-column: 2; text-align: left; margin-top: .8rem; }
}

@media (max-width: 700px) {
  .hero__title, .hero__lede, .hero__facts, .hero__figure,
  .work__title, .work__intro { grid-column: 1 / span 12; grid-row: auto; }
  .hero__figure { margin-top: 1.6rem; max-width: 15rem; }
  .pub__link { grid-template-columns: 2.4rem minmax(0,1fr); }
  .pub__meta { grid-column: 2; flex-direction: row; align-items: center; justify-content: flex-start; text-align: left; margin-top: .8rem; }
  .pub__thumb { display: none; }
}

@media (max-width: 520px) {
  .edu__item { grid-template-columns: 1fr; }
  .edu__years b { display: inline; }
}

@media print {
  .masthead, .progress, .grain, .marquee, .totop { display: none !important; }
  body { background: #fff; }
}