/* =========================================================
   Seokbeom Kwon — Personal Site
   Design system & global styles
   ========================================================= */

/* ---- Fonts ---- */
@import url('https://fonts.googleapis.com/css2?family=Newsreader:ital,opsz,wght@0,6..72,400;0,6..72,500;0,6..72,600;1,6..72,400;1,6..72,500&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Geist:wght@300;400;500;600&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Geist+Mono:wght@400;500&display=swap');

/* ---- Tokens ---- */
:root {
  --bg:           #FBFAF7;
  --bg-elev:      #FFFFFF;
  --bg-tint:      #F4F2EC;

  --ink:          #161513;
  --ink-mid:      #4A4842;
  --ink-soft:     #6E6A63;
  --ink-faint:    #A09C92;

  --accent:       #2147D9;
  --accent-deep:  #1933A8;
  --accent-soft:  #E8EDFD;

  /* Secondary accent for top general venues (Science, Nature) */
  --brick:        #A8322B;
  --brick-deep:   #7D241E;
  --brick-soft:   #F7E8E6;

  --line:         #E8E5DD;
  --line-strong:  #D4D0C4;

  --font-display: 'Newsreader', 'Iowan Old Style', Georgia, serif;
  --font-body:    'Geist', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono:    'Geist Mono', 'JetBrains Mono', ui-monospace, monospace;

  --container:    1140px;
  --measure:      68ch;

  --pad-page:     clamp(1.25rem, 4vw, 2.5rem);
  --pad-section:  clamp(3rem, 8vw, 6rem);

  --radius:       6px;
  --radius-lg:    10px;

  --t-fast:       150ms cubic-bezier(0.22, 1, 0.36, 1);
  --t-med:        320ms cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-weight: 400;
  /* MASTER FONT SIZE: change this to scale all text up/down.
     17 = compact, 18 = balanced, 19 = comfortable (current), 20 = large */
  font-size: 19px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--bg);
  font-feature-settings: 'ss01', 'ss02', 'cv11';
}

::selection { background: var(--accent); color: #fff; }

img, svg { display: block; max-width: 100%; }

a {
  color: var(--accent);
  text-decoration: none;
  text-underline-offset: 3px;
  transition: color var(--t-fast);
}
a:hover { color: var(--accent-deep); text-decoration: underline; }

/* ---- Type scale ---- */
.display {
  font-family: var(--font-display);
  font-weight: 500;
  letter-spacing: -0.015em;
  line-height: 1.05;
  color: var(--ink);
}

h1, h2, h3, h4 { margin: 0; font-weight: 500; letter-spacing: -0.01em; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 14.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
  font-weight: 500;
}

.eyebrow .num {
  color: var(--ink-faint);
  opacity: 0.55;
  margin-right: 10px;
  font-weight: 400;
}

.lead {
  font-size: 1.2rem;
  line-height: 1.6;
  color: var(--ink-mid);
  max-width: var(--measure);
}

/* ---- Layout ---- */
.page {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--pad-page);
}

.section {
  padding: var(--pad-section) 0;
  border-top: 0.5px solid var(--line);
}
.section:first-of-type { border-top: 0; }

.section-head {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 2.5rem;
  margin-bottom: 2.5rem;
  align-items: baseline;
}
.section-head .title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(1.75rem, 3.2vw, 2.5rem);
  line-height: 1.05;
  letter-spacing: -0.012em;
}
.section-head .title em {
  font-style: normal;
  font-weight: 600;
  color: var(--accent);
}

@media (max-width: 720px) {
  .section-head { grid-template-columns: 1fr; gap: 0.75rem; }
}

/* =========================================================
   Header / Nav
   ========================================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(251, 250, 247, 0.85);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 0.5px solid var(--line);
}
.site-header .inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0.875rem var(--pad-page);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.brand {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 500;
  color: var(--ink);
  letter-spacing: -0.005em;
}
.brand:hover { color: var(--ink); text-decoration: none; }
.brand .dot {
  display: inline-block;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
  vertical-align: 4px;
  margin-right: 8px;
}
nav.primary {
  display: flex;
  gap: 1.75rem;
}
nav.primary a {
  font-size: 15.5px;
  color: var(--ink-mid);
  font-weight: 400;
  position: relative;
  padding: 4px 0;
}
nav.primary a:hover { color: var(--ink); text-decoration: none; }
nav.primary a.is-active {
  color: var(--ink);
}
nav.primary a.is-active::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 1px;
  background: var(--accent);
}
.nav-toggle {
  display: none;
  background: transparent;
  border: 0;
  cursor: pointer;
  color: var(--ink);
  padding: 6px;
}
@media (max-width: 720px) {
  nav.primary { display: none; }
  .nav-toggle { display: block; }
  nav.primary.is-open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0; right: 0;
    background: var(--bg);
    padding: 1rem var(--pad-page) 1.5rem;
    border-bottom: 0.5px solid var(--line);
    gap: 0.75rem;
  }
}

/* =========================================================
   Hero (home page)
   ========================================================= */
.hero {
  padding: clamp(2.5rem, 7vw, 5rem) 0 clamp(3rem, 8vw, 5rem);
}
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: clamp(2rem, 6vw, 5rem);
  align-items: end;
}
@media (max-width: 820px) {
  .hero-grid { grid-template-columns: 1fr; gap: 2rem; }
}

/* "Now accepting students" recruiting pill — top of hero */
.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 7px 14px 7px 12px;
  background: var(--accent-soft);
  border-radius: 999px;
  font-family: var(--font-body);
  font-size: 14.5px;
  color: var(--accent-deep);
  font-weight: 500;
  letter-spacing: -0.005em;
  margin-bottom: 1.25rem;
  text-decoration: none;
}
.hero-pill .dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent);
  position: relative;
  flex-shrink: 0;
}
.hero-pill .dot::after {
  content: '';
  position: absolute;
  inset: -3px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.35;
  animation: pulse 2s ease-out infinite;
}
.hero-pill .arrow {
  opacity: 0.6;
  transition: transform var(--t-fast), opacity var(--t-fast);
}
.hero-pill:hover .arrow {
  transform: translateX(3px);
  opacity: 1;
}

/* Affiliation block — was tiny eyebrow, now prominent */
.hero-role {
  margin: 0.25rem 0 0;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(1.2rem, 2vw, 1.55rem);
  line-height: 1.35;
  color: var(--ink-mid);
  letter-spacing: -0.005em;
}
.hero-role strong {
  font-weight: 500;
  color: var(--ink);
}

.hero h1 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(3.25rem, 8.5vw, 6.5rem);
  line-height: 1;
  letter-spacing: -0.02em;
  margin: 0.25rem 0 0.75rem;
  color: var(--ink);
  font-variation-settings: 'opsz' 60;
}
.hero h1 em {
  font-style: normal;
  font-weight: 600;
  color: var(--accent);
}
.hero .meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2rem;
  margin: 1.5rem 0 0;
  padding: 1.25rem 0;
  border-top: 0.5px solid var(--line);
  border-bottom: 0.5px solid var(--line);
}
.hero .meta dt {
  font-family: var(--font-mono);
  font-size: 12.5px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink-faint);
  margin-bottom: 3px;
}
.hero .meta dd {
  margin: 0;
  font-size: 16.5px;
  color: var(--ink);
}

.hero-photo {
  aspect-ratio: 4 / 5;
  background: transparent;
  border-radius: var(--radius-lg);
  border: 0;
  overflow: visible;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ink-faint);
}
.hero-photo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
}
.hero-photo .placeholder {
  text-align: center;
  font-size: 13.5px;
  font-family: var(--font-mono);
}
.hero-photo .placeholder svg {
  width: 32px;
  height: 32px;
  margin: 0 auto 8px;
  opacity: 0.5;
}

/* =========================================================
   Hero editorial keywords (replaces photo on home)
   ========================================================= */
.hero-keywords {
  aspect-ratio: 4 / 5;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 1.75rem 0.5rem 1.5rem 0.5rem;
  position: relative;
}
.hero-keywords .kw-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-faint);
  font-weight: 500;
  margin: 0 0 1.25rem 0;
}
.hero-keywords .kw-big {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5.2vw, 3.8rem);
  font-weight: 500;
  line-height: 0.95;
  letter-spacing: -0.025em;
  margin: 0;
  padding: 0.05em 0;
}
.hero-keywords .kw-comma {
  color: var(--ink);
}
.hero-keywords .kw-mid {
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 1.55vw, 1.35rem);
  line-height: 1.4;
  color: var(--ink-mid);
  margin: 1.25rem 0 0 0;
  max-width: 95%;
}
.hero-keywords .kw-small {
  font-family: var(--font-display);
  font-style: italic;
  font-size: clamp(0.78rem, 1.05vw, 0.92rem);
  line-height: 1.55;
  color: var(--ink-soft);
  margin: auto 0 0 0;
}

.hero-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-top: 1.75rem;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 0.7rem 1.25rem;
  border-radius: var(--radius);
  font-size: 15.5px;
  font-weight: 500;
  letter-spacing: -0.005em;
  border: 0.5px solid var(--line-strong);
  background: var(--bg-elev);
  color: var(--ink);
  cursor: pointer;
  transition: all var(--t-fast);
  text-decoration: none;
}
.btn:hover {
  border-color: var(--ink-soft);
  color: var(--ink);
  text-decoration: none;
  transform: translateY(-1px);
}
.btn-primary {
  background: var(--ink);
  color: var(--bg);
  border-color: var(--ink);
}
.btn-primary:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.btn svg { width: 14px; height: 14px; }

/* ---- Featured badge (Science) ---- */
.featured-pub {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 12px 6px 6px;
  background: var(--accent-soft);
  border-radius: 999px;
  font-size: 13.5px;
  color: var(--accent-deep);
  font-weight: 500;
}
.featured-pub .tag {
  background: var(--accent);
  color: #fff;
  padding: 2px 8px;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* =========================================================
   Research cards
   ========================================================= */
.research-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border-top: 0.5px solid var(--line);
  border-left: 0.5px solid var(--line);
}
@media (max-width: 820px) {
  .research-grid { grid-template-columns: 1fr; }
}
.research-card {
  padding: 1.5rem 1.5rem 1.75rem;
  border-right: 0.5px solid var(--line);
  border-bottom: 0.5px solid var(--line);
  background: var(--bg-elev);
  transition: background var(--t-fast);
}
.research-card:hover {
  background: var(--bg-tint);
}
.research-card .idx {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--ink-faint);
  letter-spacing: 0.08em;
}
.research-card h3 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  margin: 0.75rem 0 0.5rem;
  font-weight: 500;
  letter-spacing: -0.005em;
  line-height: 1.25;
}
.research-card p {
  font-size: 18.5px;
  color: var(--ink-mid);
  line-height: 1.55;
  margin: 0;
}

.methods-row {
  margin-top: 2rem;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}
.methods-row .label {
  font-family: var(--font-mono);
  font-size: 12.5px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink-faint);
  margin-right: 6px;
}
.method-pill {
  font-size: 13.5px;
  padding: 4px 12px;
  background: var(--bg-elev);
  border: 0.5px solid var(--line);
  border-radius: 999px;
  color: var(--ink-mid);
}

/* =========================================================
   Publications list (editorial table)
   ========================================================= */
.pub-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 0.5px solid var(--line);
}
.pub-list li {
  display: grid;
  grid-template-columns: 90px 140px 1fr auto;
  gap: 1.5rem;
  padding: 1.25rem 0;
  border-bottom: 0.5px solid var(--line);
  align-items: baseline;
  transition: padding var(--t-fast);
}
.pub-list li:hover {
  padding-left: 0.5rem;
}
.pub-list .year {
  font-family: var(--font-mono);
  font-size: 13.5px;
  color: var(--ink-faint);
  letter-spacing: 0.05em;
}
.pub-list .venue {
  font-size: 13.5px;
  color: var(--ink-mid);
  font-weight: 500;
}
.pub-list .venue.tier-1 {
  color: var(--accent);
}
.pub-list .venue.tier-top {
  color: var(--brick);
  font-weight: 600;
}
.pub-list .title {
  font-size: 17.5px;
  color: var(--ink);
  line-height: 1.5;
  font-weight: 400;
}
.pub-list .authors {
  display: block;
  font-size: 15.5px;
  color: var(--ink-soft);
  margin-top: 4px;
}
.pub-list .authors .me { color: var(--ink); font-weight: 500; }
.pub-list .links {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}
.pub-list .links a {
  font-size: 13.5px;
  color: var(--ink-soft);
  padding: 4px 8px;
  border: 0.5px solid var(--line);
  border-radius: var(--radius);
}
.pub-list .links a:hover {
  border-color: var(--ink-soft);
  color: var(--ink);
  text-decoration: none;
}

@media (max-width: 820px) {
  .pub-list li {
    grid-template-columns: 1fr;
    gap: 0.5rem;
    padding: 1.25rem 0;
  }
  .pub-list li:hover { padding-left: 0; }
  .pub-list .year, .pub-list .venue {
    display: inline-block;
    margin-right: 1rem;
  }
}

/* =========================================================
   Updates / Activity feed
   ========================================================= */
.updates {
  display: flex;
  flex-direction: column;
}
.update {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 1.5rem;
  padding: 1rem 0;
  border-bottom: 0.5px dashed var(--line);
}
.update:last-child { border-bottom: 0; }
.update .when {
  font-family: var(--font-mono);
  font-size: 13.5px;
  color: var(--ink-faint);
  letter-spacing: 0.04em;
}
.update .what {
  font-size: 18.5px;
  color: var(--ink);
  line-height: 1.55;
}
.update .what .tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: transparent;
  color: var(--ink-faint);
  padding: 2px 7px 2px 0;
  border: 0;
  border-right: 1px solid var(--line-strong);
  border-radius: 0;
  margin-right: 10px;
  vertical-align: 1px;
  font-weight: 500;
}
.update .what .tag.publish,
.update .what .tag.award,
.update .what .tag.grant { background: transparent; color: var(--ink-faint); }

@media (max-width: 720px) {
  .update { grid-template-columns: 1fr; gap: 0.25rem; }
}

/* =========================================================
   Students CTA / Join the lab
   ========================================================= */
.recruit {
  background: var(--bg-elev);
  border: 0.5px solid var(--line);
  border-radius: var(--radius-lg);
  padding: clamp(2rem, 4vw, 3rem);
  position: relative;
  overflow: hidden;
}
.recruit::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 4px; height: 100%;
  background: var(--accent);
}
.recruit .status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 1rem;
}
.recruit .status .pulse {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent);
  position: relative;
}
.recruit .status .pulse::after {
  content: '';
  position: absolute;
  inset: -3px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.3;
  animation: pulse 2s ease-out infinite;
}
@keyframes pulse {
  0%   { transform: scale(1);   opacity: 0.4; }
  100% { transform: scale(2.5); opacity: 0; }
}
.recruit h2 {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 500;
  letter-spacing: -0.012em;
  line-height: 1.1;
  margin: 0 0 0.75rem;
}
.recruit h2 em { font-style: normal; font-weight: 600; color: var(--accent); }
.recruit .lead { margin-bottom: 1.75rem; }
.recruit ul.criteria {
  list-style: none;
  padding: 0;
  margin: 0 0 1.75rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.65rem 1.5rem;
}
@media (max-width: 720px) {
  .recruit ul.criteria { grid-template-columns: 1fr; }
}
.recruit ul.criteria li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-size: 16.5px;
  color: var(--ink-mid);
  line-height: 1.5;
}
.recruit ul.criteria li svg {
  width: 16px; height: 16px;
  margin-top: 3px;
  color: var(--accent);
  flex-shrink: 0;
}
.recruit .fineprint {
  margin-top: 1.5rem;
  padding-top: 1.25rem;
  border-top: 0.5px solid var(--line);
  font-size: 15.5px;
  color: var(--ink-soft);
  line-height: 1.55;
}

/* =========================================================
   Research Highlights page
   ========================================================= */
.highlight {
  padding: clamp(2.5rem, 5vw, 4rem) 0;
  border-top: 0.5px solid var(--line);
}
.highlight:first-of-type { border-top: 0; }

.highlight-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
}
@media (max-width: 900px) {
  .highlight-grid { grid-template-columns: 1fr; gap: 1.75rem; }
}

.highlight-visual {
  background: var(--bg-elev);
  border: 0.5px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  position: relative;
  overflow: hidden;
}
.highlight-visual svg {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
}
.highlight-visual .vis-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 1rem;
  font-weight: 500;
}

/* ---- Real paper figures ---- */
.paper-fig {
  display: block;
  width: 100%;
  height: auto;
  margin: 0 auto;
  border-radius: 4px;
}
.paper-fig + .paper-fig {
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 0.5px solid var(--line);
}
.fig-caption {
  margin-top: 0.875rem;
  padding-top: 0.875rem;
  border-top: 0.5px solid var(--line);
  font-size: 13px;
  line-height: 1.5;
  color: var(--ink-soft);
}
.fig-caption strong {
  color: var(--ink);
  font-weight: 500;
}
.fig-grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  align-items: start;
}
@media (max-width: 600px) {
  .fig-grid-2 { grid-template-columns: 1fr; }
}

.highlight-content .venue-line {
  display: flex;
  gap: 12px;
  align-items: center;
  margin-bottom: 0.75rem;
  flex-wrap: wrap;
}
.highlight-content .venue-badge {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: var(--accent-soft);
  color: var(--accent-deep);
  padding: 4px 10px;
  border-radius: 4px;
  font-weight: 500;
}
.highlight-content .venue-badge.tier-1 {
  background: var(--accent);
  color: #fff;
}
.highlight-content .venue-badge.tier-top {
  background: var(--brick);
  color: #fff;
}
.highlight-content .meta-text {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-soft);
  letter-spacing: 0.03em;
}
.highlight-content h2 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 2.6vw, 2rem);
  font-weight: 500;
  letter-spacing: -0.01em;
  line-height: 1.2;
  margin: 0 0 1.25rem;
  color: var(--ink);
}
.highlight-content .question {
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink-mid);
  margin: 0 0 1.5rem;
}
.highlight-content .findings {
  list-style: none;
  padding: 0;
  margin: 0 0 1.5rem;
  border-top: 0.5px solid var(--line);
}
.highlight-content .findings li {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 1rem;
  padding: 0.875rem 0;
  border-bottom: 0.5px solid var(--line);
  align-items: baseline;
}
.highlight-content .findings .label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-faint);
  font-weight: 500;
}
.highlight-content .findings .value {
  font-size: 15px;
  line-height: 1.55;
  color: var(--ink);
}
.highlight-content .findings .value strong {
  color: var(--accent);
  font-weight: 600;
}
.highlight-content .paper-links {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.highlight-content .paper-links a {
  font-size: 13px;
  padding: 6px 12px;
  border: 0.5px solid var(--line-strong);
  border-radius: var(--radius);
  color: var(--ink);
  text-decoration: none;
  transition: all var(--t-fast);
}
.highlight-content .paper-links a:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.site-footer {
  margin-top: var(--pad-section);
  border-top: 0.5px solid var(--line);
  padding: 3rem 0 4rem;
}
.site-footer .inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--pad-page);
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 2rem;
}
@media (max-width: 720px) {
  .site-footer .inner { grid-template-columns: 1fr; gap: 1.75rem; }
}
.site-footer h4 {
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin: 0 0 0.875rem;
}
.site-footer p, .site-footer a {
  font-size: 18.5px;
  color: var(--ink-mid);
  line-height: 1.65;
  margin: 0 0 0.25rem;
}
.site-footer a:hover { color: var(--accent); }
.site-footer .colophon {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 0.5px solid var(--line);
  max-width: var(--container);
  margin-left: auto; margin-right: auto;
  padding-left: var(--pad-page);
  padding-right: var(--pad-page);
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.05em;
  color: var(--ink-faint);
}

/* =========================================================
   Page-specific tweaks
   ========================================================= */
.page-head {
  padding: clamp(2.5rem, 6vw, 4.5rem) 0 clamp(2rem, 4vw, 3rem);
  border-bottom: 0.5px solid var(--line);
}
.page-head .crumb {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 1rem;
}
.page-head h1 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  line-height: 1.02;
  letter-spacing: -0.018em;
  margin: 0 0 1rem;
  font-variation-settings: 'opsz' 60;
}
.page-head h1 em { font-style: normal; font-weight: 600; color: var(--accent); }

/* Filter bar (publications) */
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 2rem 0;
}
.filter-chip {
  padding: 6px 14px;
  font-size: 15.5px;
  background: transparent;
  border: 0.5px solid var(--line);
  border-radius: 999px;
  color: var(--ink-mid);
  cursor: pointer;
  font-family: var(--font-body);
  transition: all var(--t-fast);
}
.filter-chip:hover { border-color: var(--ink-soft); color: var(--ink); }
.filter-chip.is-active {
  background: var(--ink);
  color: var(--bg);
  border-color: var(--ink);
}

/* Contact card */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
}
@media (max-width: 720px) {
  .contact-grid { grid-template-columns: 1fr; }
}
.contact-block dt {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 6px;
}
.contact-block dd {
  font-size: 16.5px;
  margin: 0 0 1.25rem;
  color: var(--ink);
}

/* =========================================================
   Reveal animations
   ========================================================= */
.reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
}
.reveal.is-in {
  opacity: 1;
  transform: none;
}
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* Print */
@media print {
  .site-header, .site-footer, .nav-toggle, .hero-actions, .filters { display: none; }
  body { background: #fff; color: #000; }
  a { color: #000; text-decoration: underline; }
}