/* =====================================================================
   Zisu Huang — academic homepage (compact edition)
   Aesthetic: warm ink-on-paper, editorial, hand-drawn brush accents
   Fonts: Fraunces (display) · Newsreader (body) · Space Mono (labels)
   ===================================================================== */

:root {
  --paper: #ffffff;
  --paper-2: #f2f3f4;
  --card: #ffffff;
  --ink: #16181c;
  --ink-soft: #33373d;
  --ink-faint: #6b7178;
  --line: #e6e7e9;
  --accent: #16181c;
  --accent-deep: #000000;
  --pop-red: #e0503a;
  --pop-blue: #2f6fb5;
  --pop-amber: #e0a12b;
  --pop-green: #2f9068;
  --ochre: #e0a12b;
  --ochre-soft: #e0a12b;
  --coral: #e0503a;

  --marker: rgba(224, 161, 43, 0.28);

  --font-display: "Fraunces", Georgia, serif;
  --font-body: "Newsreader", Georgia, serif;
  --font-mono: "Space Mono", "SFMono-Regular", monospace;
  --font-name: "Pacifico", "Fraunces", cursive;

  --maxw: 1120px;
  --label-w: 200px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

[data-theme="dark"] {
  --paper: #15140f;
  --paper-2: #1c1b14;
  --card: #1f1d16;
  --ink: #efeadc;
  --ink-soft: #b3ad9d;
  --ink-faint: #7c7768;
  --line: #33312a;
  --accent: #5cc292;
  --accent-deep: #7bd6a9;
  --coral: #e8825f;
  --marker: rgba(92, 194, 146, 0.22);
}

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

html {
  scroll-behavior: smooth;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
html::-webkit-scrollbar {
  width: 0;
  height: 0;
  display: none;
}

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 21px;
  line-height: 1.72;
  font-weight: 420;
  font-optical-sizing: auto;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  transition:
    background 0.4s var(--ease),
    color 0.4s var(--ease);
}

a {
  color: inherit;
}

/* ---- paper grain ---- */
.grain {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: 0.4;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.4'/%3E%3C/svg%3E");
}
[data-theme="dark"] .grain {
  mix-blend-mode: screen;
  opacity: 0.05;
}

/* =====================================================================
   NAV
   ===================================================================== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem clamp(1.1rem, 5vw, 2.4rem);
  transition:
    background 0.35s var(--ease),
    box-shadow 0.35s var(--ease);
}
.nav.is-scrolled {
  background: color-mix(in srgb, var(--paper) 85%, transparent);
  backdrop-filter: blur(10px) saturate(1.3);
  box-shadow: 0 1px 0 var(--line);
}
.nav__brand {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  text-decoration: none;
}
.nav__mark {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.15rem;
  width: 2.1rem;
  height: 2.1rem;
  display: grid;
  place-items: center;
  border: 1.5px solid var(--ink);
  border-radius: 50%;
}
.nav__name {
  font-family: "Archivo", var(--font-body);
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: -0.01em;
  opacity: 0;
  transform: translateX(-6px);
  transition:
    opacity 0.35s var(--ease),
    transform 0.35s var(--ease);
}
.nav.is-scrolled .nav__name {
  opacity: 1;
  transform: none;
}
.nav__links {
  display: flex;
  gap: 1.9rem;
  font-family: var(--font-mono);
  font-size: 0.95rem;
}
.nav__links a {
  position: relative;
  text-decoration: none;
  color: var(--ink-soft);
  padding: 0.15rem 0;
  transition: color 0.3s var(--ease);
}
.nav__links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 100%;
  height: 1.5px;
  background: var(--ink);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.32s var(--ease);
}
.nav__links a:hover,
.nav__links a.is-active {
  color: var(--ink);
}
.nav__links a:hover::after,
.nav__links a.is-active::after {
  transform: scaleX(1);
}
.theme-toggle {
  background: none;
  border: 1.5px solid var(--line);
  color: var(--ink);
  width: 2.3rem;
  height: 2.3rem;
  border-radius: 50%;
  cursor: pointer;
  font-size: 0.92rem;
  display: grid;
  place-items: center;
  transition:
    border-color 0.3s var(--ease),
    transform 0.35s var(--ease);
}
.theme-toggle:hover {
  border-color: var(--accent);
  transform: rotate(-20deg);
}
@media (max-width: 620px) {
  .nav__links {
    display: none;
  }
}

/* =====================================================================
   LAYOUT SHELL
   ===================================================================== */
main {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 clamp(1.1rem, 5vw, 2.4rem);
  position: relative;
  z-index: 2;
}

/* =====================================================================
   HERO
   ===================================================================== */
.hero {
  display: grid;
  grid-template-columns: 250px 1fr;
  gap: clamp(1.4rem, 3vw, 2.4rem);
  align-items: start;
  padding: clamp(6rem, 12vh, 8rem) 0 clamp(1.4rem, 3vh, 2rem);
}
.hero__portrait {
  animation: portrait-in 1.05s 0.1s var(--ease) both;
  will-change: transform, opacity;
}
.portrait {
  position: relative;
  width: 250px;
  display: block;
  padding: 0;
  border: none;
  background: none;
  cursor: pointer;
  perspective: 1100px;
  -webkit-tap-highlight-color: transparent;
}
.portrait__flip {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  transform-style: preserve-3d;
  transition: transform 0.75s cubic-bezier(0.6, 0.02, 0.1, 1);
}
.portrait.is-flipped .portrait__flip {
  transform: rotateY(180deg);
}
.portrait__face {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  overflow: hidden;
  border: 6px solid var(--card);
  box-shadow: 0 14px 34px rgba(20, 24, 24, 0.14);
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}
.portrait__face--back {
  transform: rotateY(180deg);
}
.portrait__face img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.portrait__face--front img {
  filter: saturate(1.02) contrast(1.03);
}
.portrait:hover .portrait__flip:not(:hover) {
  /* keep hover subtle; scale handled below */
}
.portrait:hover .portrait__face {
  box-shadow: 0 18px 40px rgba(20, 24, 24, 0.2);
}
/* corner peek that hints the hidden side */
.portrait__peek {
  position: absolute;
  right: 8px;
  bottom: 8px;
  width: 74px;
  height: 74px;
  border-radius: 50%;
  overflow: hidden;
  border: 4px solid var(--card);
  box-shadow: 0 6px 16px rgba(20, 24, 24, 0.22);
  z-index: 4;
  background: var(--paper-2);
  transition:
    transform 0.35s var(--ease),
    box-shadow 0.35s var(--ease);
}
.portrait:hover .portrait__peek {
  transform: scale(1.08) rotate(-4deg);
  box-shadow: 0 8px 20px rgba(20, 24, 24, 0.3);
}
.portrait__peek-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: opacity 0.4s var(--ease);
}
.portrait__peek-img--manga {
  opacity: 0;
}
.portrait.is-flipped .portrait__peek-img--real {
  opacity: 0;
}
.portrait.is-flipped .portrait__peek-img--manga {
  opacity: 1;
}

.hero__text {
  animation: none;
}
.hero__text > * {
  animation: fade-up 0.85s var(--ease) both;
  will-change: transform, opacity;
}
.hero__name {
  animation: name-in 0.95s 0.15s var(--ease) both;
  will-change: transform, opacity;
}
.hero__bio {
  animation-delay: 0.4s;
}
.hero__tagline {
  animation-delay: 0.55s;
}
.hero__text > .focus {
  animation-delay: 0.7s;
}
.hero__text > .news-head {
  animation-delay: 0.85s;
}
.hero__text > .news-panel {
  animation-delay: 1s;
}
.hero__name {
  font-family: var(--font-name);
  font-weight: 400;
  font-size: clamp(2.7rem, 5.8vw, 4rem);
  line-height: 1.05;
  letter-spacing: 0;
  color: var(--accent);
  margin-bottom: 1.5rem;
  position: relative;
  width: max-content;
  max-width: 100%;
  padding: 0.06em 0.04em 0.12em;
}
@keyframes fade-up {
  from {
    opacity: 0;
    transform: translate3d(0, 16px, 0);
  }
  to {
    opacity: 1;
    transform: translate3d(0, 0, 0);
  }
}
@keyframes portrait-in {
  from {
    opacity: 0;
    transform: translate3d(0, 20px, 0) scale(0.94);
  }
  to {
    opacity: 1;
    transform: translate3d(0, 0, 0) scale(1);
  }
}
@keyframes name-in {
  from {
    opacity: 0;
    transform: translate3d(0, 18px, 0);
  }
  to {
    opacity: 1;
    transform: translate3d(0, 0, 0);
  }
}

.hero__bio {
  font-size: 1.08rem;
  line-height: 1.72;
  color: var(--ink-soft);
  max-width: 74ch;
  margin-bottom: 1.1rem;
}
.hero__bio a {
  color: var(--ink);
  text-decoration-color: var(--pop-blue);
  text-decoration-thickness: 1.5px;
  text-underline-offset: 2.5px;
  text-decoration-skip-ink: none;
  transition:
    color 0.2s var(--ease),
    text-decoration-color 0.2s var(--ease);
}
.hero__bio a:hover {
  color: var(--pop-blue);
  text-decoration-color: var(--pop-blue);
  text-decoration-thickness: 2px;
}
.hero__bio strong {
  font-weight: 600;
  color: var(--ink);
}
.inline-logo {
  height: 1.05em;
  width: auto;
  vertical-align: -0.16em;
  margin-right: 0.22em;
  border-radius: 2px;
}
.inline-logo--nlp {
  height: 1.35em;
  vertical-align: -0.32em;
}
.logo-word {
  white-space: nowrap;
}
.hero__tagline {
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 1.08rem;
  line-height: 1.72;
  max-width: 74ch;
  margin-bottom: 0.55rem;
  color: var(--ink-soft);
}
.hero__tagline em {
  font-style: italic;
  color: var(--accent-deep);
}
.hero__tagline .kw-lead {
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--ink);
}
.hero__tagline .kw {
  font-weight: 600;
  color: var(--ink);
  background-image: linear-gradient(transparent 62%, color-mix(in srgb, var(--pop-blue) 24%, transparent) 62%);
  padding: 0 0.05em;
  border-radius: 2px;
}

/* research focus list, inline in hero */
.focus {
  list-style: none;
  margin-bottom: 1.6rem;
  max-width: 74ch;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}
.focus li {
  position: relative;
  padding-left: 1.25rem;
  font-size: 1.05rem;
  line-height: 1.6;
  color: var(--ink-soft);
}
.focus li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--ink);
  box-shadow:
    0 0 0 2px var(--paper),
    0 0 0 3px var(--ink);
}
.focus > li:nth-child(2)::before {
  background: var(--ink);
  box-shadow:
    0 0 0 2px var(--paper),
    0 0 0 3px var(--ink);
}
.focus__key {
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--ink);
}
.focus .term {
  font-weight: 600;
  color: var(--ink);
  border-bottom: 1.5px solid color-mix(in srgb, var(--pop-blue) 32%, transparent);
}
.focus--sub {
  margin: 0.5rem 0 0;
  padding-left: 1.35rem;
  gap: 0.45rem;
}
.focus--sub li {
  font-size: 1rem;
}
.focus--sub li::before {
  width: 6px;
  height: 6px;
  top: 0.62em;
  background: transparent;
  border: 1.5px solid var(--ink);
  box-shadow: none;
}
.focus--sub li:nth-child(2)::before {
  background: transparent;
  border: 1.5px solid var(--ink);
  box-shadow: none;
}

/* highlighter marker sweep */
.ink-mark {
  position: relative;
  white-space: nowrap;
  padding: 0 0.1em;
}
.ink-mark::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0.06em;
  height: 0.58em;
  background: var(--marker);
  z-index: -1;
  transform: skewX(-4deg) scaleX(0);
  transform-origin: left;
  border-radius: 2px;
  animation: mark 0.6s 1s var(--ease) forwards;
}
.ink-mark:nth-of-type(2)::before {
  animation-delay: 1.2s;
}
@keyframes mark {
  to {
    transform: skewX(-4deg) scaleX(1);
  }
}

/* contact links under portrait */
.contact {
  list-style: none;
  margin-top: 1.9rem;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}
.contact a {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: "Archivo", var(--font-mono);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  text-decoration: none;
  color: var(--ink);
  transition: color 0.3s var(--ease);
  word-break: break-word;
  line-height: 1.4;
}
.contact a i {
  color: var(--ink);
  width: 1.4rem;
  font-size: 1.15rem;
  text-align: center;
  flex-shrink: 0;
}
.contact a:hover {
  color: var(--ink-faint);
}
.contact a:hover i {
  color: var(--ink-faint);
}
.contact-note {
  margin-top: 1.4rem;
  max-width: 30ch;
  font-family: var(--font-body);
  font-size: 0.9rem;
  line-height: 1.45;
  color: var(--ink-faint);
}

@media (max-width: 620px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 1.3rem;
  }
  .portrait {
    width: 140px;
  }
}

/* =====================================================================
   BLOCK — header on top with divider line, content below
   ===================================================================== */
.block {
  padding: clamp(1.6rem, 3vh, 2.2rem) 0;
  scroll-margin-top: 4.5rem;
}
.block__head {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  flex-wrap: wrap;
  padding-bottom: 0.7rem;
  margin-bottom: 1.1rem;
  border-bottom: 2.5px solid var(--ink);
}
.block__kicker {
  flex-basis: 100%;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.15rem;
}
.block__kicker::before {
  content: "§ ";
  color: var(--ochre);
}
.block__num {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent-deep);
  letter-spacing: 0.08em;
}
.block__title {
  font-family: var(--font-display);
  font-weight: 450;
  font-size: 1.95rem;
  letter-spacing: -0.02em;
  line-height: 1.08;
  font-variation-settings:
    "opsz" 30,
    "wght" 450,
    "WONK" 0;
}
/* ochre highlighter sweep behind a heading phrase */
.hl {
  background-image: linear-gradient(var(--marker), var(--marker));
  background-repeat: no-repeat;
  background-position: 0 82%;
  background-size: 100% 0.4em;
  padding: 0 0.06em;
}
.block__aside {
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 400;
  color: var(--ink-faint);
  letter-spacing: 0;
  margin-left: 0.4rem;
  white-space: nowrap;
}
.block__aside sup {
  color: var(--pop-red);
  font-size: 0.85em;
  font-weight: 600;
  vertical-align: super;
  line-height: 0;
}
.block__note {
  flex-basis: 100%;
  font-size: 0.9rem;
  color: var(--ink-faint);
  margin-top: 0.1rem;
  line-height: 1.5;
}
.block__note sup {
  color: var(--coral);
}

.block__intro {
  font-size: 1.05rem;
  color: var(--ink-soft);
  margin-bottom: 1.4rem;
  max-width: 62ch;
}
.block__intro em {
  font-style: italic;
  color: var(--accent-deep);
  font-weight: 500;
}

/* news — titled scrollable panel under the bio (reference-inspired) */
.news-head {
  margin: -0.5rem 0 0.9rem;
}
.news-title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.5rem;
  letter-spacing: -0.02em;
  color: var(--ink);
  display: inline-block;
}
.news-panel {
  max-width: 760px;
  max-height: 236px;
  overflow-y: auto;
  overscroll-behavior: contain;
  background: var(--card);
  border: 1.5px solid var(--line);
  border-radius: 10px;
  padding: 0.4rem 1.4rem 0.4rem 1.2rem;
  scrollbar-width: thin;
  scrollbar-color: color-mix(in srgb, var(--pop-blue) 55%, var(--line)) var(--paper-2);
}
.news-panel::-webkit-scrollbar {
  width: 8px;
}
.news-panel::-webkit-scrollbar-track {
  background: var(--paper-2);
  border-radius: 6px;
  margin: 8px 0;
}
.news-panel::-webkit-scrollbar-thumb {
  background: color-mix(in srgb, var(--pop-blue) 55%, var(--line));
  border-radius: 6px;
  border: 2px solid var(--paper-2);
}
.news-panel::-webkit-scrollbar-thumb:hover {
  background: var(--pop-blue);
}
.news {
  list-style: none;
  position: relative;
}
/* continuous vertical timeline spine */
.news::before {
  content: "";
  position: absolute;
  top: 1.35rem;
  bottom: 1.35rem;
  left: 4px;
  width: 1.5px;
  background: var(--line);
}
.news li {
  position: relative;
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 1rem;
  padding: 0.85rem 0 0.85rem 1.7rem;
  align-items: baseline;
}
/* timeline node dot */
.news li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1.2rem;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--card);
  border: 2px solid var(--ink-faint);
  box-shadow: 0 0 0 4px var(--card);
  z-index: 1;
  transition:
    transform 0.25s var(--ease),
    border-color 0.25s var(--ease),
    background 0.25s var(--ease);
}
/* newest item gets a highlighted, ringed node */
.news li:first-child::before {
  background: var(--pop-blue);
  border-color: var(--pop-blue);
  box-shadow:
    0 0 0 4px var(--card),
    0 0 0 6px color-mix(in srgb, var(--pop-blue) 22%, transparent);
}
.news li:hover::before {
  transform: scale(1.25);
  border-color: var(--pop-blue);
  background: var(--pop-blue);
}
.news time {
  font-family: "Archivo", var(--font-body);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--ink-faint);
  white-space: nowrap;
}
.news p {
  font-size: 1rem;
  color: var(--ink-soft);
  line-height: 1.55;
}
.news strong {
  color: var(--ink);
  font-weight: 600;
}
.news a {
  color: var(--pop-blue);
  text-underline-offset: 2.5px;
  transition:
    color 0.2s var(--ease),
    text-decoration-thickness 0.2s var(--ease);
}
.news a:hover {
  color: var(--pop-blue);
  text-decoration-thickness: 2px;
}
.gh-star {
  display: none;
  align-items: center;
  gap: 0.18em;
  margin-left: 0.34em;
  padding: 0.02em 0.42em 0.02em 0.36em;
  border: 1px solid var(--line);
  border-radius: 40px;
  background: var(--paper-2);
  font-family: "Archivo", var(--font-body);
  font-size: 0.74em;
  font-weight: 600;
  line-height: 1.5;
  color: var(--ink-soft);
  vertical-align: 0.08em;
  white-space: nowrap;
}
.gh-star.is-loaded {
  display: inline-flex;
  opacity: 0;
  transform: scale(0.8);
  transition:
    opacity 0.4s var(--ease),
    transform 0.4s var(--ease);
}
.gh-star.is-visible {
  opacity: 1;
  transform: scale(1);
}
.gh-star svg {
  width: 0.86em;
  height: 0.86em;
  fill: var(--pop-amber);
}
@media (max-width: 480px) {
  .news li {
    grid-template-columns: 1fr;
    gap: 0.15rem;
  }
}

@media (max-width: 720px) {
  .block__head {
    gap: 0.5rem;
  }
}

/* ---- research definition list ---- */
.deflist {
  display: flex;
  flex-direction: column;
}
.deflist__row {
  display: grid;
  grid-template-columns: 210px 1fr;
  gap: 1.2rem;
  padding: 0.85rem 0;
  border-top: 1px solid var(--line);
  align-items: baseline;
}
.deflist__row:first-child {
  border-top: none;
  padding-top: 0.2rem;
}
.deflist dt {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.02rem;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.deflist dd {
  font-size: 0.95rem;
  color: var(--ink-soft);
  line-height: 1.55;
}
@media (max-width: 560px) {
  .deflist__row {
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }
}

/* ---- publications ---- */
.pubs {
  list-style: none;
  display: flex;
  flex-direction: column;
}
.pub {
  display: grid;
  grid-template-columns: 290px 1fr;
  gap: 1.6rem;
  padding: 1.3rem 0;
  border-top: 1px solid var(--line);
  align-items: start;
}
@media (max-width: 900px) {
  .pub {
    grid-template-columns: 270px 1fr;
  }
}
.pub:first-child {
  border-top: none;
  padding-top: 0.2rem;
}
.pub__thumb {
  display: block;
  border-radius: 6px;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background: var(--paper-2);
  border: 1px solid var(--line);
}
.pub__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s var(--ease);
}
.pub__thumb img.pub__thumb-img--contain {
  object-fit: contain;
  background: #fff;
}
.pub:hover .pub__thumb img {
  transform: scale(1.05);
}
.pub__venue {
  font-family: "Archivo", var(--font-body);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--ink-faint);
  text-transform: uppercase;
}
.pub__venue--accent {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  color: var(--pop-blue);
  background: color-mix(in srgb, var(--pop-blue) 12%, transparent);
  border: 1.5px solid color-mix(in srgb, var(--pop-blue) 55%, transparent);
  padding: 0.2rem 0.6rem 0.2rem 0.5rem;
  border-radius: 40px;
  letter-spacing: 0.06em;
  line-height: 1;
}
.pub__venue--accent::before {
  content: "\f02e";
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  font-size: 0.82em;
}
[data-theme="dark"] .pub__venue--accent {
  color: var(--pop-blue);
}
.pub__venue--survey {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  color: var(--pop-green);
  background: color-mix(in srgb, var(--pop-green) 12%, transparent);
  border: 1.5px solid color-mix(in srgb, var(--pop-green) 55%, transparent);
  padding: 0.2rem 0.6rem 0.2rem 0.5rem;
  border-radius: 40px;
  letter-spacing: 0.06em;
  line-height: 1;
}
.pub__venue--survey::before {
  content: "\f02d";
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  font-size: 0.82em;
}
.pub__title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.42rem;
  line-height: 1.32;
  letter-spacing: -0.01em;
  margin: 0.22rem 0 0.62rem;
  color: var(--ink);
}
.pub__authors {
  font-size: 1.08rem;
  color: var(--ink-soft);
  line-height: 1.56;
}
.pub__authors sup {
  color: var(--pop-red);
  font-size: 0.85em;
  font-weight: 600;
  vertical-align: super;
  line-height: 0;
}
.pub__topline {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.4rem 0.9rem;
  margin-bottom: 0.22rem;
}
.pub__topics {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.9rem;
  margin: 0;
}
.pub__topics span {
  display: inline-flex;
  align-items: center;
  gap: 0.2em;
  color: color-mix(in srgb, var(--pop-blue) 58%, var(--ink));
  font-family: "Archivo", var(--font-body);
  font-size: 0.82rem;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: 0.015em;
}
.pub__topics span::before {
  content: "#";
  color: var(--pop-blue);
  font-weight: 700;
}

/* hand-drawn brush underline for MY name */
.me {
  position: relative;
  color: var(--ink);
  font-weight: 600;
  white-space: nowrap;
  padding-bottom: 0.22em;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='12' viewBox='0 0 120 12'%3E%3Cpath d='M2,7 C22,3 42,9 62,6 C82,3 100,8 118,5' fill='none' stroke='%2316181c' stroke-width='3.4' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: 0 100%;
  background-size: 100% 0.5em;
}
[data-theme="dark"] .me {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='12' viewBox='0 0 120 12'%3E%3Cpath d='M2,7 C22,3 42,9 62,6 C82,3 100,8 118,5' fill='none' stroke='%235cc292' stroke-width='3.4' stroke-linecap='round'/%3E%3C/svg%3E");
}

.pub__badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: 0.5rem;
}
.tag {
  font-family: "Archivo", var(--font-body);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 0.26rem 0.75rem;
  border-radius: 40px;
  display: inline-flex;
  align-items: center;
  gap: 0.35em;
}
.tag--star {
  background: rgba(250, 204, 21, 0.18);
  color: #a16207;
}
.tag--blue {
  background: rgba(29, 155, 240, 0.14);
  color: #1170b8;
}
.tag--orange {
  background: rgba(249, 115, 22, 0.16);
  color: #c2410c;
}

.pub__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.55rem;
}
.pub__links a {
  font-family: "Archivo", var(--font-body);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: -0.005em;
  text-decoration: none;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--line);
  padding: 0.32rem 0.9rem;
  border-radius: 40px;
  box-shadow: 0 1px 2px rgba(22, 24, 28, 0.08);
  transition:
    transform 0.18s var(--ease),
    box-shadow 0.18s var(--ease),
    background 0.28s var(--ease),
    color 0.28s var(--ease);
}
.pub__links a:hover {
  background: var(--paper-2);
  color: var(--ink);
  border-color: var(--ink-faint);
  transform: translateY(-1px);
  box-shadow: 0 3px 8px rgba(22, 24, 28, 0.12);
}

@media (max-width: 560px) {
  .pub {
    grid-template-columns: 1fr;
    gap: 0.7rem;
  }
  .pub__thumb {
    max-width: 220px;
  }
}

/* ---- all publications link ---- */
.pubs-all {
  margin-top: 0.55rem;
  font-size: 1.08rem;
  color: var(--ink-soft);
  line-height: 1.6;
}
.pubs-all::before {
  content: "→";
  margin-right: 0.45em;
  color: var(--accent-deep);
  font-weight: 700;
}
.pubs-all a {
  color: var(--accent-deep);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 2px solid color-mix(in srgb, var(--accent) 40%, transparent);
  transition: border-color 0.25s var(--ease);
}
.pubs-all a:hover {
  border-color: var(--accent);
}

/* =====================================================================
   VISITOR MAP
   ===================================================================== */
.visitor-map {
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0.7rem 0 1.4rem;
  padding: 1.2rem 0;
  border-top: 1px solid var(--line);
}
.visitor-map__content {
  display: flex;
  align-items: center;
  flex-direction: column;
  gap: 0.55rem;
}
.visitor-map__widget {
  width: 280px;
  height: 140px;
  flex: none;
  overflow: hidden;
  line-height: 0;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--paper-2);
  box-shadow: 0 5px 16px rgba(22, 24, 28, 0.08);
}
.visitor-map__counter {
  display: inline-flex;
  align-items: center;
  gap: 0.22rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 400;
  letter-spacing: 0.02em;
  text-decoration: none;
  color: var(--ink-faint);
  line-height: 0;
  transition:
    color 0.2s var(--ease),
    transform 0.2s var(--ease);
}
.visitor-map__counter:hover {
  color: var(--ink);
  transform: translateY(-1px);
}
.visitor-map__counter img {
  display: block;
  height: 18px;
  width: auto;
  filter: invert(1) grayscale(1);
  mix-blend-mode: multiply;
  opacity: 0.72;
}
.visitor-map__counter span {
  line-height: 1;
}
.visitor-map__widget noscript {
  display: grid;
  min-height: 140px;
  place-items: center;
  padding: 1rem;
  color: var(--ink-faint);
  font-size: 0.85rem;
  text-align: center;
}
@media (max-width: 560px) {
  .visitor-map__widget {
    max-width: 100%;
  }
}

/* =====================================================================
   FOOTER
   ===================================================================== */
.footer {
  position: relative;
  z-index: 2;
  background: var(--paper);
  color: var(--ink-faint);
  padding: 0.45rem clamp(1.1rem, 5vw, 2.4rem);
  border-top: 1px solid var(--line);
  text-align: center;
  margin-top: 0;
}
.footer__fine {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--ink-faint);
  margin: 0;
}

/* =====================================================================
   MOTION PREFERENCES
   ===================================================================== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
  .brush__path {
    stroke-dashoffset: 0;
  }
  .ink-mark::before {
    transform: skewX(-4deg) scaleX(1);
  }
}