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

    :root {
      --bg:          #eef2fb;
      --bg2:         #e4ecf8;
      --surface:     #ffffff;
      --surface2:    #f8faff;
      --surface-dark:#dce7f5;
      --border:      rgba(59,130,246,0.18);
      --border-light:rgba(0,0,0,0.1);
      --accent:      #2563eb;
      --accent2:     #3b82f6;
      --accent3:     #60a5fa;
      --text:        #1e293b;
      --text-dark:   #1e293b;
      --text-dim:    #475569;
      --text-dim-dark:#64748b;
      --text-bright: #0f172a;
      --text-bright-dark:#0f172a;
      --gold:        #b45309;
    }

    html { scroll-behavior: smooth; }

    body {
      background: var(--bg);
      color: var(--text);
      font-family: 'Plus Jakarta Sans', sans-serif;
      font-weight: 400;
      line-height: 1.7;
      overflow-x: hidden;
    }

    /* subtle dot grid */
    body::before {
      content: '';
      position: fixed;
      inset: 0;
      background-image: radial-gradient(circle, rgba(59,130,246,0.13) 1px, transparent 1px);
      background-size: 32px 32px;
      pointer-events: none;
      z-index: 0;
    }

    /* top gradient wash */
    body::after {
      content: '';
      position: fixed;
      top: 0; left: 0; right: 0;
      height: 600px;
      background: linear-gradient(180deg, rgba(59,130,246,0.09) 0%, transparent 100%);
      pointer-events: none;
      z-index: 0;
    }

    /* ── NAV ── */
    nav {
      position: fixed;
      top: 0; left: 0; right: 0;
      z-index: 100;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 1rem 4rem;
      background: rgba(238,242,251,0.92);
      backdrop-filter: blur(20px);
      border-bottom: 1px solid rgba(59,130,246,0.15);
    }

    .nav-brand {
      font-family: 'DM Mono', monospace;
      font-size: 0.72rem;
      font-weight: 700;
      letter-spacing: 0.22em;
      color: var(--accent);
      text-transform: uppercase;
    }

    .nav-links {
      display: flex;
      gap: 2.2rem;
      list-style: none;
    }

    .nav-links a {
      font-family: 'DM Mono', monospace;
      font-size: 0.68rem;
      font-weight: 700;
      letter-spacing: 0.14em;
      color: rgba(30,41,59,0.65);
      text-decoration: none;
      text-transform: uppercase;
      transition: color 0.2s;
      position: relative;
    }

    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: -3px; left: 0;
      width: 0; height: 2px;
      background: var(--accent);
      border-radius: 2px;
      transition: width 0.3s;
    }

    .nav-links a:hover { color: var(--accent); }
    .nav-links a:hover::after { width: 100%; }

    /* ── HERO ── */
    #hero-shell {
      width: 100%;
      display: flex;
      justify-content: center;
      min-height: 100vh;
      position: relative;
      z-index: 1;
    }

    #hero {
      min-height: 100vh;
      display: grid;
      grid-template-columns: 1fr auto;
      align-items: center;
      padding: 7rem 5vw 4rem;
      gap: 4rem;
      position: relative;
      z-index: 1;
      width: 100%;
      max-width: 1200px;
    }

    .hero-content { max-width: 560px; }

    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 0.6rem;
      font-family: 'DM Mono', monospace;
      font-size: 0.66rem;
      letter-spacing: 0.25em;
      text-transform: uppercase;
      color: var(--accent);
      margin-bottom: 1.5rem;
      background: rgba(59,130,246,0.08);
      padding: 0.4rem 0.9rem;
      border-radius: 999px;
      border: 1px solid rgba(59,130,246,0.2);
      opacity: 0;
      animation: fadeUp 0.8s 0.2s forwards;
    }

    .tag-dot {
      width: 6px; height: 6px;
      border-radius: 50%;
      background: var(--accent);
      animation: pulse 2s infinite;
    }

    @keyframes pulse {
      0%, 100% { opacity: 1; }
      50% { opacity: 0.4; }
    }

    h1 {
      font-family: 'Cormorant Garamond', serif;
      font-size: clamp(3.8rem, 5.5vw, 6.5rem);
      font-weight: 700;
      line-height: 1.0;
      color: var(--text-bright);
      letter-spacing: -0.02em;
      opacity: 0;
      animation: fadeUp 0.9s 0.35s forwards;
    }

    h1 em {
      font-style: italic;
      font-weight: 600;
      color: var(--accent2);
      display: block;
    }

    .hero-sub {
      margin-top: 1.4rem;
      font-size: 1rem;
      font-weight: 500;
      color: var(--text-dim);
      opacity: 0;
      animation: fadeUp 0.9s 0.5s forwards;
    }

    .hero-sub strong { color: var(--accent2); font-weight: 700; }

    .hero-email {
      margin-top: 0.5rem;
      font-family: 'DM Mono', monospace;
      font-size: 0.75rem;
      color: rgba(71,85,105,0.8);
      opacity: 0;
      animation: fadeUp 0.9s 0.6s forwards;
    }

    .hero-links {
      display: flex;
      flex-wrap: wrap;
      gap: 0.6rem;
      margin-top: 2rem;
      opacity: 0;
      animation: fadeUp 0.9s 0.75s forwards;
    }

    .pill {
      display: inline-flex;
      align-items: center;
      gap: 0.35rem;
      padding: 0.4rem 1rem;
      border: 1px solid rgba(59,130,246,0.3);
      border-radius: 999px;
      font-family: 'DM Mono', monospace;
      font-size: 0.65rem;
      letter-spacing: 0.1em;
      text-transform: uppercase;
      color: rgba(30,41,59,0.75);
      text-decoration: none;
      transition: all 0.25s;
      background: rgba(59,130,246,0.07);
    }

    .pill:hover {
      border-color: var(--accent2);
      color: var(--accent2);
      background: rgba(59,130,246,0.15);
      transform: translateY(-1px);
      box-shadow: 0 4px 16px rgba(59,130,246,0.2);
    }

    .pill.primary {
      background: var(--accent);
      border-color: var(--accent);
      color: #fff;
    }

    .pill.primary:hover {
      background: #2563eb;
      border-color: #2563eb;
      color: #fff;
      box-shadow: 0 4px 20px rgba(59,130,246,0.4);
    }

    /* Photo */
    .hero-photo {
      display: flex;
      justify-content: flex-end;
      align-items: center;
      opacity: 0;
      animation: fadeIn 1.2s 0.6s forwards;
      padding-left: 0;
    }

    .photo-frame {
      position: relative;
      width: 340px;
      height: 420px;
      border-radius: 14px;
      overflow: visible;
      flex-shrink: 0;
    }

    .photo-frame::before {
      content: '';
      position: absolute;
      inset: -14px;
      border: 1.5px solid rgba(59,130,246,0.18);
      border-radius: 18px;
    }

    .photo-frame::after {
      content: '';
      position: absolute;
      top: 14px; left: 14px;
      right: -14px; bottom: -14px;
      background: linear-gradient(135deg, rgba(59,130,246,0.1), rgba(14,165,233,0.07));
      border-radius: 14px;
      z-index: -1;
    }

    .photo-frame img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      object-position: center top;
      border-radius: 14px;
      filter: saturate(0.95) contrast(1.04);
      box-shadow: 0 24px 60px rgba(59,130,246,0.18);
    }

    .photo-badge {
      position: absolute;
      bottom: -20px;
      right: -20px;
      background: var(--accent);
      color: #fff;
      padding: 0.65rem 1rem;
      border-radius: 10px;
      font-family: 'DM Mono', monospace;
      font-size: 0.6rem;
      letter-spacing: 0.1em;
      text-transform: uppercase;
      box-shadow: 0 8px 24px rgba(59,130,246,0.32);
      white-space: nowrap;
    }

    /* ── SECTIONS ── */
    .container {
      max-width: 1100px;
      margin: 0 auto;
      padding: 5rem 4rem;
      position: relative;
      z-index: 1;
    }

    .section-label {
      display: inline-flex;
      align-items: center;
      gap: 0.6rem;
      font-family: 'DM Mono', monospace;
      font-size: 0.62rem;
      letter-spacing: 0.28em;
      text-transform: uppercase;
      color: var(--accent2);
      margin-bottom: 2.5rem;
      background: rgba(59,130,246,0.1);
      padding: 0.3rem 0.8rem;
      border-radius: 999px;
      border: 1px solid rgba(59,130,246,0.2);
    }

    /* Section label on white bg */
    .light-section .section-label {
      color: var(--accent);
      background: rgba(59,130,246,0.07);
      border-color: rgba(59,130,246,0.18);
    }

    h2 {
      font-family: 'Cormorant Garamond', serif;
      font-size: clamp(1.8rem, 3vw, 3rem);
      font-weight: 700;
      color: var(--text-bright);
      line-height: 1.15;
      margin-bottom: 1.5rem;
    }

    /* ── ABOUT ── */
    #about,
    #notfound {
      background: var(--surface);
      border-top: 1px solid var(--border-light);
      border-bottom: 1px solid var(--border-light);
    }

    .about-grid {
      display: flex;
      justify-content: center;
    }

    .stat-block { margin-bottom: 2.2rem; }

    .stat-num {
      font-family: 'Cormorant Garamond', serif;
      font-size: 3rem;
      font-weight: 700;
      color: var(--accent);
      line-height: 1;
    }

    .stat-lbl {
      font-family: 'DM Mono', monospace;
      font-size: 0.6rem;
      letter-spacing: 0.18em;
      text-transform: uppercase;
      color: var(--text-dim-dark);
      margin-top: 0.2rem;
    }

    .about-text { font-size: 1rem; font-weight: 400; color: var(--text-dark); line-height: 1.9; max-width: 760px; width: 100%; }
    .about-text p + p { margin-top: 1.1rem; }
    .about-text a { color: var(--accent); text-decoration: none; border-bottom: 1px solid rgba(59,130,246,0.3); transition: border-color 0.2s; }
    .about-text a:hover { border-color: var(--accent); }

    /* h2 default = dark section (white text) */
    h2 {
      font-family: 'Cormorant Garamond', serif;
      font-size: clamp(1.8rem, 3vw, 3rem);
      font-weight: 700;
      color: var(--text-bright);
      line-height: 1.15;
      margin-bottom: 1.5rem;
    }

    /* h2 in light/white sections */
    .light-section h2 { color: var(--text-bright-dark); }

    /* Highlights heading stands alone (no section-label pill above it) */
    #highlights h2 { margin-bottom: 2.5rem; }

    /* ── PUBLICATIONS — dark bg ── */
    #publications { background: var(--bg2); }

    .pub-card {
      background: rgba(255,255,255,0.80);
      border: 1px solid rgba(59,130,246,0.2);
      border-radius: 12px;
      padding: 2rem 2.5rem;
      transition: box-shadow 0.3s, transform 0.3s, background 0.3s;
      position: relative;
      overflow: hidden;
    }

    .pub-card::before {
      content: '';
      position: absolute;
      top: 0; left: 0;
      width: 4px; height: 100%;
      background: linear-gradient(to bottom, var(--accent), var(--accent2));
      border-radius: 4px 0 0 4px;
    }

    .pub-card:hover {
      background: rgba(59,130,246,0.07);
      box-shadow: 0 12px 40px rgba(59,130,246,0.2);
      transform: translateY(-3px);
    }

    .pub-journal {
      font-family: 'DM Mono', monospace;
      font-size: 0.62rem;
      letter-spacing: 0.2em;
      text-transform: uppercase;
      color: var(--accent2);
      margin-bottom: 0.7rem;
    }

    .pub-title {
      font-family: 'Cormorant Garamond', serif;
      font-size: 1.4rem;
      font-weight: 700;
      color: var(--text-bright);
      line-height: 1.4;
      margin-bottom: 0.8rem;
    }

    .pub-authors {
      font-size: 0.82rem;
      font-weight: 400;
      color: var(--text-dim);
      line-height: 1.65;
    }

    .pub-authors strong { color: var(--accent2); font-weight: 600; }

    .pub-link {
      display: inline-flex;
      align-items: center;
      gap: 0.4rem;
      margin-top: 1rem;
      font-family: 'DM Mono', monospace;
      font-size: 0.62rem;
      letter-spacing: 0.15em;
      text-transform: uppercase;
      color: var(--accent2);
      text-decoration: none;
      transition: gap 0.2s, color 0.2s;
    }
    .pub-link:hover { gap: 0.7rem; color: var(--accent); }

    /* ── EXPERIENCE — white bg ── */
    #experience {
      background: var(--surface);
      border-top: 1px solid rgba(0,0,0,0.08);
      border-bottom: 1px solid rgba(0,0,0,0.08);
    }

    .exp-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 1.5rem;
    }

    .exp-card {
      background: #fff;
      border: 1px solid rgba(59,130,246,0.15);
      border-radius: 12px;
      padding: 1.8rem;
      transition: box-shadow 0.3s, transform 0.3s;
      box-shadow: 0 2px 12px rgba(0,0,0,0.05);
    }

    .exp-card:hover {
      box-shadow: 0 10px 32px rgba(59,130,246,0.15);
      transform: translateY(-3px);
    }

    .exp-year {
      font-family: 'DM Mono', monospace;
      font-size: 0.62rem;
      letter-spacing: 0.2em;
      color: var(--gold);
      text-transform: uppercase;
      margin-bottom: 0.5rem;
    }

    .exp-title {
      font-family: 'Cormorant Garamond', serif;
      font-size: 1.2rem;
      font-weight: 700;
      color: var(--text-bright-dark);
      margin-bottom: 0.25rem;
    }

    .exp-place { font-size: 0.88rem; color: var(--accent); font-weight: 500; margin-bottom: 0.7rem; }
    .exp-desc { font-size: 0.83rem; font-weight: 400; color: var(--text-dim-dark); line-height: 1.65; }

    /* ── EDUCATION — dark bg ── */
    #education { background: var(--bg); }

    .edu-timeline { position: relative; padding-left: 2.5rem; }

    .edu-timeline::before {
      content: '';
      position: absolute;
      left: 5px; top: 10px; bottom: 10px;
      width: 2px;
      background: linear-gradient(to bottom, var(--accent), rgba(59,130,246,0.08));
      border-radius: 2px;
    }

    .edu-item { position: relative; padding-bottom: 3rem; }

    .edu-item::before {
      content: '';
      position: absolute;
      left: -2.5rem;
      top: 9px;
      width: 12px; height: 12px;
      border-radius: 50%;
      background: var(--bg);
      border: 2.5px solid var(--accent);
      box-shadow: 0 0 10px rgba(59,130,246,0.4);
    }

    .edu-year {
      font-family: 'DM Mono', monospace;
      font-size: 0.62rem;
      letter-spacing: 0.2em;
      color: var(--gold);
      text-transform: uppercase;
      margin-bottom: 0.4rem;
    }

    .edu-degree {
      font-family: 'Cormorant Garamond', serif;
      font-size: 1.55rem;
      font-weight: 700;
      color: var(--text-bright);
      margin-bottom: 0.2rem;
    }

    .edu-inst { font-size: 0.92rem; color: var(--accent2); font-weight: 500; margin-bottom: 0.6rem; }
    .edu-detail { font-size: 0.83rem; font-weight: 400; color: var(--text-dim); line-height: 1.65; }
    .edu-detail a { color: var(--accent2); text-decoration: none; }

    /* ── HIGHLIGHTS — white bg ── */
    #highlights {
      background: var(--surface);
      border-top: 1px solid rgba(0,0,0,0.08);
      border-bottom: 1px solid rgba(0,0,0,0.08);
    }

    .timeline-year-group { margin-bottom: 2.5rem; }

    .timeline-year-header {
      font-family: 'Cormorant Garamond', serif;
      font-size: 1.8rem;
      font-weight: 700;
      color: var(--accent);
      border-bottom: 2px solid rgba(59,130,246,0.15);
      padding-bottom: 0.5rem;
      margin-bottom: 1.2rem;
    }

    .hl-item {
      display: flex;
      gap: 1.2rem;
      padding: 0.8rem 0;
      border-bottom: 1px dashed rgba(59,130,246,0.12);
      align-items: flex-start;
      transition: background 0.2s, padding-left 0.2s;
    }

    .hl-item:last-child { border-bottom: none; }
    .hl-item:hover { background: rgba(59,130,246,0.04); border-radius: 8px; padding-left: 0.5rem; }

    .hl-month {
      font-family: 'DM Mono', monospace;
      font-size: 0.65rem;
      letter-spacing: 0.12em;
      text-transform: uppercase;
      color: var(--accent);
      background: rgba(59,130,246,0.08);
      padding: 0.25rem 0.6rem;
      border-radius: 4px;
      min-width: 46px;
      text-align: center;
      margin-top: 2px;
      flex-shrink: 0;
      border: 1px solid rgba(59,130,246,0.15);
    }

    .hl-badge {
      display: inline-flex;
      align-items: center;
      gap: 0.3rem;
      font-family: 'DM Mono', monospace;
      font-size: 0.58rem;
      letter-spacing: 0.1em;
      text-transform: uppercase;
      padding: 0.18rem 0.5rem;
      border-radius: 4px;
      margin-top: 0.35rem;
    }

    .badge-award   { background: rgba(245,158,11,0.1); color: #b45309; border: 1px solid rgba(245,158,11,0.25); }
    .badge-fellow  { background: rgba(59,130,246,0.08); color: var(--accent); border: 1px solid rgba(59,130,246,0.2); }
    .badge-milestone { background: rgba(15,23,42,0.06); color: #334155; border: 1px solid rgba(15,23,42,0.12); }

    .hl-text { font-size: 0.9rem; color: var(--text-dark); line-height: 1.5; flex: 1; font-weight: 700; }
    .hl-text a { color: var(--accent); font-size: 0.78rem; font-family: 'DM Mono', monospace; text-decoration: none; }
    .hl-text a:hover { text-decoration: underline; }

    /* ── FOOTER — dark bg ── */
    footer {
      padding: 2.5rem 2rem;
      border-top: 1px solid rgba(59,130,246,0.15);
      display: flex;
      justify-content: center;
      position: relative;
      z-index: 1;
      background: var(--bg2);
    }

    .footer-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
      max-width: 1100px;
    }

    .footer-name {
      font-family: 'Cormorant Garamond', serif;
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-dim);
    }

    .footer-links { display: flex; gap: 1.5rem; }
    .footer-links a {
      font-family: 'DM Mono', monospace;
      font-size: 0.6rem;
      font-weight: 700;
      letter-spacing: 0.14em;
      text-transform: uppercase;
      color: var(--text-dim);
      text-decoration: none;
      transition: color 0.2s;
    }
    .footer-links a:hover { color: var(--accent2); }

    /* ── ANIMATIONS ── */
    @keyframes fadeUp {
      from { opacity: 0; transform: translateY(22px); }
      to   { opacity: 1; transform: translateY(0); }
    }

    @keyframes fadeIn {
      from { opacity: 0; }
      to   { opacity: 1; }
    }

    .reveal {
      opacity: 0;
      transform: translateY(18px);
      transition: opacity 0.65s ease, transform 0.65s ease;
    }

    .reveal.visible { opacity: 1; transform: none; }

    /* ── RESPONSIVE ── */
    @media (max-width: 900px) {
      #hero { grid-template-columns: 1fr; padding: 7rem 2rem 3rem; gap: 2rem; }
      .hero-photo { display: none; }
      .container { padding: 3.5rem 1.5rem; }
      .about-grid { grid-template-columns: 1fr; gap: 2.5rem; }
      nav { padding: 1rem 1.5rem; }
      .nav-links { gap: 1rem; }
      footer { padding: 2rem 1.5rem; } .footer-inner { flex-direction: column; gap: 1.2rem; text-align: center; }
    }

/* ══════════════════════════════════════════════════════════
   MULTI-PAGE ADDITIONS
   ══════════════════════════════════════════════════════════ */

/* sticky footer: each page holds one section, so push footer down */
body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}
body > section,
body > #hero-shell { flex: 1 0 auto; }
body > footer { flex-shrink: 0; }

/* nav brand is now a link home */
a.nav-brand { text-decoration: none; }
a.nav-brand:hover { color: var(--accent2); }

/* current-page state in nav */
.nav-links a.active { color: var(--accent); }
.nav-links a.active::after { width: 100%; }

/* content pages sit below the fixed nav */
body > section:not(#hero) > .container { padding-top: 7.5rem; }

/* "read more" link on the home page teaser */
.more-link { margin-top: 1.6rem; }
.more-link a {
  font-family: 'DM Mono', monospace;
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid rgba(37,99,235,0.35);
  padding-bottom: 2px;
  transition: border-color 0.2s, color 0.2s;
}
.more-link a:hover { color: var(--accent2); border-color: var(--accent2); }

/* mobile nav toggle */
.nav-toggle {
  display: none;
  background: none;
  border: 1px solid rgba(59,130,246,0.25);
  border-radius: 8px;
  color: var(--accent);
  font-size: 1.1rem;
  line-height: 1;
  padding: 0.35rem 0.6rem;
  cursor: pointer;
}

@media (max-width: 780px) {
  nav { flex-wrap: wrap; }
  .nav-toggle { display: block; }
  .nav-links {
    display: none;
    flex-direction: column;
    width: 100%;
    gap: 0.9rem;
    padding: 1rem 0 0.4rem;
  }
  .nav-links.open { display: flex; }
  nav:has(.nav-links.open) { background: var(--bg); border-bottom-color: rgba(59,130,246,0.28); }
  .nav-links.open a { padding: 0.15rem 0; }
  body > section:not(#hero) > .container { padding-top: 6rem; }
}