/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --navy:        #1a2e4a;
  --navy-dark:   #0f1e32;
  --blue:        #2563eb;
  --blue-light:  #dbeafe;
  --gold:        #f59e0b;
  --gold-light:  #fef3c7;
  --gray-50:     #f8fafc;
  --gray-100:    #f1f5f9;
  --gray-200:    #e2e8f0;
  --gray-400:    #94a3b8;
  --gray-600:    #475569;
  --gray-800:    #1e293b;
  --white:       #ffffff;
  --max-w:       1140px;
  --radius:      6px;
  --shadow:      0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
  --shadow-md:   0 4px 12px rgba(0,0,0,.10);
}

html { scroll-behavior: smooth; }

body {
  font-family: "Georgia", "Times New Roman", serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--gray-800);
  background: var(--white);
}

a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ===== NAV ===== */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--navy-dark);
  box-shadow: 0 2px 8px rgba(0,0,0,.25);
  /* position: sticky acts as containing block for the absolute mobile dropdown */
}

.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 58px;
}

.nav-brand {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: .75rem;
  text-decoration: none;
}

.nav-logo { flex-shrink: 0; }

.nav-brand-text {
  display: flex;
  flex-direction: column;
}

.nav-brand-name {
  color: var(--white);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: .9rem;
  font-weight: 700;
  letter-spacing: .03em;
  line-height: 1.2;
}

.nav-brand-sub {
  color: #93c5fd;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: .65rem;
  letter-spacing: .06em;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  gap: 1.1rem;
  list-style: none;
}

.nav-links a {
  color: #cbd5e1;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: .8rem;
  letter-spacing: .06em;
  text-transform: uppercase;
  text-decoration: none;
  transition: color .2s;
}

.nav-links a:hover { color: var(--white); }

/* ===== HERO ===== */
.hero {
  background:
    url('images/hero-crystal.svg') center center / cover no-repeat;
  color: var(--white);
  padding: 2.25rem 1.5rem 2.25rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero-inner { max-width: var(--max-w); margin: 0 auto; position: relative; }

.hero-decode {
  display: inline-block;
  background: rgba(255,255,255,.1);
  border: 1px solid rgba(255,255,255,.2);
  border-radius: 4px;
  padding: .3rem 1rem;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: .8rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: #93c5fd;
  margin-bottom: 1.25rem;
}

.hero h1 {
  font-size: 2.75rem;
  font-weight: normal;
  letter-spacing: .015em;
  margin-bottom: .4rem;
  color: var(--white);
}

.hero-lab-full {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 1rem;
  color: #bfdbfe;
  margin-bottom: .2rem;
  font-style: italic;
}

.hero-title {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 1rem;
  color: #cbd5e1;
  margin-bottom: .2rem;
}

.hero-inst {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: .9rem;
  color: #94a3b8;
  margin-bottom: 2rem;
}

.hero-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: .65rem;
  margin-bottom: 2.75rem;
}

.hero-links a {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .4rem .95rem;
  border-radius: 4px;
  border: 1px solid rgba(255,255,255,.25);
  color: #e2e8f0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: .82rem;
  text-decoration: none;
  transition: background .2s, border-color .2s;
}

.hero-links a:hover {
  background: rgba(255,255,255,.12);
  border-color: rgba(255,255,255,.5);
  text-decoration: none;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 3rem;
  flex-wrap: wrap;
}

.stat { text-align: center; }
.stat-num {
  display: block;
  font-size: 2.1rem;
  font-weight: bold;
  color: #93c5fd;
  line-height: 1.1;
}
.stat-label {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: .72rem;
  color: #94a3b8;
  text-transform: uppercase;
  letter-spacing: .08em;
}

/* ===== SECTION WRAPPER ===== */
section { padding: 2.25rem 1.5rem; }
section:nth-child(even) { background: var(--gray-50); }

.section-inner { max-width: var(--max-w); margin: 0 auto; }

.section-header { margin-bottom: 2rem; }

h2 {
  font-size: 1.65rem;
  font-weight: normal;
  color: var(--navy);
  padding-bottom: .4rem;
  border-bottom: 2.5px solid var(--blue);
  display: inline-block;
  margin-bottom: .5rem;
}

.section-sub {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: .9rem;
  color: var(--gray-600);
  margin-top: .4rem;
}

/* ===== ABOUT ===== */
.about-top {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  margin-bottom: 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--gray-200);
}

.about-photo {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  object-fit: cover;
  object-position: center top;
  border: 3px solid var(--blue-light);
  box-shadow: var(--shadow-md);
  flex-shrink: 0;
}

.about-name {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: .3rem;
}

.about-pos {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: .875rem;
  color: var(--gray-600);
  line-height: 1.6;
}

@media (max-width: 480px) {
  .about-top { flex-direction: column; text-align: center; }
}


.about-grid {
  display: grid;
  grid-template-columns: 1fr 270px;
  gap: 2.5rem;
  align-items: start;
}

.about-text p {
  margin-bottom: 1rem;
  color: var(--gray-800);
  text-align: justify;
}

.about-text p:last-child { margin-bottom: 0; }

/* ===== EDUCATION SECTION ===== */
.edu-section-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.edu-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-top: 3px solid var(--blue);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.edu-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.25rem 1.5rem 1rem;
  background: var(--gray-50);
  border-bottom: 1px solid var(--gray-200);
}

.edu-card-degree {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 1rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: .2rem;
}

.edu-card-inst {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: .875rem;
  color: var(--gray-600);
  font-style: italic;
}

.edu-card-date {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: .8rem;
  color: var(--gray-400);
  white-space: nowrap;
  flex-shrink: 0;
  padding-top: .15rem;
}

.edu-card-body {
  padding: 1rem 1.5rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: .75rem;
}

.edu-card-row {
  display: flex;
  gap: .75rem;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: .875rem;
  line-height: 1.55;
  align-items: flex-start;
}

.edu-label {
  font-weight: 600;
  color: var(--navy);
  min-width: 80px;
  flex-shrink: 0;
  font-size: .8rem;
  text-transform: uppercase;
  letter-spacing: .04em;
  padding-top: .1rem;
}

.edu-thesis {
  color: var(--gray-600);
  font-style: italic;
}

@media (max-width: 740px) {
  .edu-section-grid { grid-template-columns: 1fr; }
}

.about-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.2rem 1.4rem;
  margin-bottom: 1rem;
}

.about-card:last-child { margin-bottom: 0; }

.about-card h3 {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: .7rem;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--gray-400);
  margin-bottom: .8rem;
}

.about-card ul {
  list-style: none;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: .85rem;
  color: var(--gray-600);
}

.about-card ul li {
  padding: .3rem 0;
  border-bottom: 1px solid var(--gray-100);
  display: flex;
  align-items: flex-start;
  gap: .5rem;
  line-height: 1.5;
}

.about-card ul li:last-child { border-bottom: none; }

.dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--blue);
  margin-top: .5rem;
  flex-shrink: 0;
}

/* ===== RESEARCH ===== */
.research-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.research-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-top: 3px solid var(--blue);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.5rem;
  transition: box-shadow .2s, transform .2s;
}

.research-card.future { border-top-color: var(--gold); }
.research-card.methods { border-top-color: #6366f1; }

.research-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.thrust-num {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: .68rem;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--blue);
  margin-bottom: .5rem;
  font-weight: 600;
}

.research-card.future .thrust-num { color: var(--gold); }
.research-card.methods .thrust-num { color: #6366f1; }

.research-card h3 {
  font-size: 1rem;
  color: var(--navy);
  margin-bottom: .75rem;
  line-height: 1.4;
}

.research-card p {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: .855rem;
  color: var(--gray-600);
  line-height: 1.65;
  margin-bottom: .9rem;
  text-align: justify;
}

.tags { display: flex; flex-wrap: wrap; gap: .35rem; }

/* Figure inside a research card */
.card-figure {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--gray-100);
}

.card-figure img {
  width: 100%;
  display: block;
  border-radius: 4px;
  border: 1px solid var(--gray-200);
}

.card-figure figcaption {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: .72rem;
  color: var(--gray-400);
  margin-top: .4rem;
  font-style: italic;
  text-align: center;
  line-height: 1.4;
}

.tag {
  background: var(--blue-light);
  color: #1d4ed8;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: .7rem;
  padding: .18rem .5rem;
  border-radius: 20px;
  letter-spacing: .02em;
}

.tag-gold { background: var(--gold-light); color: #92400e; }
.tag-purple { background: #ede9fe; color: #5b21b6; }

/* ===== PUBLICATIONS ===== */
.pub-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: .75rem;
  margin-bottom: 1.25rem;
}

.pub-filter {
  display: flex;
  gap: .45rem;
  flex-wrap: wrap;
}

.filter-btn {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: .78rem;
  padding: .3rem .8rem;
  border: 1px solid var(--gray-200);
  border-radius: 20px;
  background: var(--white);
  color: var(--gray-600);
  cursor: pointer;
  transition: all .18s;
}

.filter-btn:hover { background: var(--gray-100); }
.filter-btn.active { background: var(--navy); color: var(--white); border-color: var(--navy); }

.pub-count {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: .8rem;
  color: var(--gray-400);
}

.pub-list { display: flex; flex-direction: column; gap: .75rem; }

.pub-item {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: .95rem 1.2rem;
  box-shadow: var(--shadow);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: .855rem;
  line-height: 1.65;
  transition: border-color .2s;
}

.pub-item:hover { border-color: #93c5fd; }
.pub-item.first-author { border-left: 3px solid var(--blue); }
.pub-item.in-prep { border-left: 3px solid var(--gold); background: #fffdf5; }

.pub-num { font-weight: 700; color: var(--gray-400); margin-right: .35rem; font-size: .8rem; }
.pub-authors { color: var(--gray-600); }
.pub-authors strong { color: var(--navy); font-weight: 600; }
.pub-title { color: var(--gray-800); }
.pub-journal { color: var(--blue); font-style: italic; }

.pub-badge {
  display: inline-block;
  font-size: .67rem;
  padding: .1rem .48rem;
  border-radius: 10px;
  margin-left: .4rem;
  vertical-align: middle;
  font-style: normal;
  font-weight: 600;
}

.badge-fa   { background: var(--blue-light); color: #1d4ed8; }
.badge-prep { background: var(--gold-light); color: #92400e; }
.badge-nc   { background: #dcfce7; color: #166534; }

.pub-pdf {
  display: inline-block;
  font-size: .67rem;
  font-weight: 600;
  padding: .1rem .48rem;
  border-radius: 10px;
  margin-left: .4rem;
  vertical-align: middle;
  background: #fef2f2;
  color: #dc2626;
  border: 1px solid #fecaca;
  text-decoration: none;
  transition: background .15s;
}
.pub-pdf:hover { background: #fee2e2; color: #991b1b; }

/* ===== GALLERY ===== */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

/* First gallery item spans 2 columns */
.gallery-item:first-child {
  grid-column: span 2;
}

/* Items 3–5: full width across all 3 columns */
.gallery-item:nth-child(3),
.gallery-item:nth-child(4),
.gallery-item:nth-child(5) {
  grid-column: span 3;
}

.gallery-item:nth-child(3) .gallery-img-wrap { height: 420px; }
.gallery-item:nth-child(4) .gallery-img-wrap { height: 360px; }
.gallery-item:nth-child(5) .gallery-img-wrap { height: 360px; }

.gallery-item {
  display: flex;
  flex-direction: column;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: box-shadow .2s, transform .2s;
}

.gallery-item:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.gallery-img-wrap {
  position: relative;
  width: 100%;
  height: 260px;
  background: var(--gray-100);
  overflow: hidden;
}

.gallery-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: var(--white);
  display: block;
  padding: .5rem;
}

/* Hide real img when it has no src, show placeholder instead */
.gallery-img[data-placeholder="true"] { display: none; }

.gallery-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gray-100);
  border-bottom: 1px solid var(--gray-200);
}

/* Hide placeholder once a real image is loaded */
.gallery-img:not([data-placeholder]) + .gallery-placeholder,
.gallery-img[src]:not([src=""]) + .gallery-placeholder { display: none; }

.gallery-placeholder span {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: .78rem;
  color: var(--gray-400);
  font-style: italic;
}

.gallery-caption {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: .82rem;
  color: var(--gray-600);
  line-height: 1.55;
  padding: .8rem 1rem;
  flex: 1;
  text-align: center;
}

@media (max-width: 740px) {
  .gallery-grid { grid-template-columns: repeat(2, 1fr); }
  .gallery-item:first-child,
  .gallery-item:nth-child(3),
  .gallery-item:nth-child(4),
  .gallery-item:nth-child(5) { grid-column: span 2; }
}

@media (max-width: 480px) {
  .gallery-grid { grid-template-columns: 1fr; }
  .gallery-item:first-child,
  .gallery-item:nth-child(3),
  .gallery-item:nth-child(4),
  .gallery-item:nth-child(5) { grid-column: span 1; }
}


/* ===== CV ===== */
.cv-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

.cv-block {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 1.3rem 1.5rem;
  box-shadow: var(--shadow);
}

.cv-block h3 {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: .7rem;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--gray-400);
  margin-bottom: 1rem;
  padding-bottom: .5rem;
  border-bottom: 1px solid var(--gray-100);
}

.cv-entry { margin-bottom: 1.1rem; }
.cv-entry:last-child { margin-bottom: 0; }

.cv-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: .5rem;
  flex-wrap: wrap;
}

.cv-entry-title {
  font-weight: bold;
  color: var(--navy);
  font-size: .9rem;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.cv-entry-date {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: .78rem;
  color: var(--gray-400);
  white-space: nowrap;
  flex-shrink: 0;
}

.cv-entry-sub {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: .83rem;
  color: var(--gray-600);
  font-style: italic;
  margin-top: .1rem;
}

.cv-entry-note {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: .8rem;
  color: var(--gray-400);
  margin-top: .1rem;
}

.cv-awards ul {
  list-style: none;
  padding: 0;
}

.cv-awards ul li {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: .85rem;
  color: var(--gray-600);
  padding: .4rem 0;
  border-bottom: 1px solid var(--gray-100);
  display: flex;
  gap: .5rem;
  align-items: flex-start;
  line-height: 1.5;
}

.cv-awards ul li:last-child { border-bottom: none; }

.cv-download {
  background: var(--navy);
  border-radius: var(--radius);
  padding: 2rem;
  text-align: center;
}

.cv-download p {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: .9rem;
  color: #94a3b8;
  margin-bottom: 1.1rem;
}

.btn-download {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  background: var(--blue);
  color: var(--white);
  padding: .7rem 1.8rem;
  border-radius: 4px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: .9rem;
  font-weight: 600;
  text-decoration: none;
  transition: background .2s;
}

.btn-download:hover { background: #1d4ed8; text-decoration: none; }

/* ===== FOOTER ===== */
footer {
  background: var(--navy-dark);
  color: #64748b;
  text-align: center;
  padding: 2.25rem 1.5rem;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: .82rem;
}

footer a { color: #93c5fd; }
footer p + p { margin-top: .4rem; }

/* ===== HAMBURGER BUTTON ===== */
.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: .4rem;
  flex-shrink: 0;
}

.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: #cbd5e1;
  border-radius: 2px;
  transition: transform .25s, opacity .25s, background .2s;
  transform-origin: center;
}

.nav-hamburger:hover span { background: var(--white); }

/* Animate to X when open */
.nav-hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===== RESPONSIVE ===== */

/* Tablet: collapse grids */
@media (max-width: 740px) {
  .about-grid,
  .research-grid,
  .cv-columns { grid-template-columns: 1fr; }

  .hero h1 { font-size: 2.1rem; }
  .hero-stats { gap: 1.75rem; }

  /* Publication filter: allow horizontal scroll on tight screens */
  .pub-filter { flex-wrap: nowrap; overflow-x: auto; padding-bottom: .25rem; }
  .pub-filter::-webkit-scrollbar { height: 3px; }
  .pub-filter::-webkit-scrollbar-thumb { background: var(--gray-200); border-radius: 2px; }
  .filter-btn { flex-shrink: 0; }
}

/* Mobile: hamburger nav */
@media (max-width: 600px) {
  .nav-hamburger { display: flex; }
  .nav-brand-sub { display: none; }

  /* Stack nav links into a full-width dropdown */
  .nav-links {
    display: none;
    position: absolute;
    top: 58px;
    left: 0; right: 0;
    background: var(--navy-dark);
    flex-direction: column;
    gap: 0;
    padding: .4rem 0 .6rem;
    border-top: 1px solid rgba(255,255,255,.08);
    box-shadow: 0 6px 16px rgba(0,0,0,.35);
    z-index: 99;
  }

  .nav-links.open { display: flex; }

  .nav-links li { text-align: center; }
  .nav-links a {
    display: block;
    padding: .75rem 1.5rem;
    font-size: .85rem;
    letter-spacing: .05em;
  }
  .nav-links a:hover { background: rgba(255,255,255,.06); }
}

/* Small mobile */
@media (max-width: 480px) {
  section { padding: 3rem 1rem; }
  .hero { padding: 3.5rem 1rem 3rem; }
  .hero h1 { font-size: 1.8rem; }
  .hero-stats { gap: 1.25rem; }
  .stat-num { font-size: 1.7rem; }
  .hero-links { gap: .45rem; }
  .hero-links a { font-size: .78rem; padding: .35rem .75rem; }
  .pub-meta { flex-direction: column; align-items: flex-start; gap: .5rem; }
}