/* ---------- Design tokens ---------- */
:root {
  --ink: #0d2538;
  --ink-2: #263f52;
  --muted: #5d7486;
  --accent: #1957c8;
  --accent-hover: #1248ad;
  --accent-light: #e5efff;
  --paper: #ffffff;
  --tint: #f6f8fb;
  --line: #dce4eb;
  --dark: #091f32;
  --max: 1216px;
  --radius: 10px;
  --shadow: 0 20px 50px rgba(13, 37, 56, .1);
  --serif: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", Georgia, serif;
  --sans: "Aptos", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 82px; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: var(--sans); font-size: 16px; line-height: 1.7; text-rendering: optimizeLegibility; -webkit-font-smoothing: antialiased; }
body.menu-open { overflow: hidden; overscroll-behavior: contain; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
.sr-only { position: absolute !important; width: 1px !important; height: 1px !important; padding: 0 !important; margin: -1px !important; overflow: hidden !important; clip: rect(0, 0, 0, 0) !important; white-space: nowrap !important; border: 0 !important; }
.container { width: min(calc(100% - 64px), var(--max)); margin-inline: auto; }
::selection { color: var(--ink); background: #cbdfff; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }
.skip-link { position: fixed; z-index: 999; left: 16px; top: -80px; padding: 10px 16px; color: white; background: var(--accent); transition: top .2s; }
.skip-link:focus { top: 12px; }

/* ---------- Navigation ---------- */
.site-header { position: fixed; z-index: 100; inset: 0 0 auto; border-bottom: 1px solid transparent; transition: background .3s, border-color .3s, box-shadow .3s; }
.site-header.scrolled { background: rgba(255,255,255,.94); border-color: rgba(217,226,236,.8); box-shadow: 0 4px 24px rgba(16,42,67,.05); backdrop-filter: blur(14px); }
.nav { height: 78px; display: flex; align-items: center; justify-content: flex-end; }
h1 em, h2 em { color: var(--accent); font-style: normal; }
.nav-links { display: flex; align-items: center; gap: clamp(18px, 2.2vw, 32px); }
.nav-links a { position: relative; color: var(--ink-2); font-size: .76rem; font-weight: 650; letter-spacing: .055em; }
.nav-links a:not(.nav-contact)::after { content: ""; position: absolute; inset: auto 0 -7px; height: 1px; background: var(--accent); transform: scaleX(0); transform-origin: right; transition: transform .25s; }
.nav-links a:hover::after, .nav-links a.active::after { transform: scaleX(1); transform-origin: left; }
.nav-contact { padding: 9px 17px; color: white !important; background: var(--ink); border-radius: 5px; transition: background .2s, transform .2s; }
.nav-contact:hover { background: var(--accent); transform: translateY(-1px); }
.nav-toggle { display: none; width: 44px; height: 44px; padding: 11px; border: 0; background: transparent; cursor: pointer; }
.nav-toggle span { display: block; width: 22px; height: 1.5px; margin: 5px 0; background: var(--ink); transition: .25s; }

/* ---------- Hero ---------- */
.hero { min-height: 100svh; position: relative; display: grid; align-items: center; overflow: hidden; padding: 150px 0 100px; background: linear-gradient(118deg,#fff 0%,#fff 61%,#f6f9fd 61%,#edf4fc 100%); }
.hero-inner { position: relative; z-index: 2; }
.eyebrow, .kicker { margin: 0 0 14px; color: var(--accent); font-size: .72rem; line-height: 1; font-weight: 750; letter-spacing: .18em; text-transform: uppercase; }
.hero h1 { max-width: 900px; margin: 0; color: var(--ink); font-family: var(--serif); font-size: clamp(4.4rem, 8.8vw, 8.25rem); font-weight: 400; line-height: .91; letter-spacing: -.06em; text-wrap: balance; }
.hero-role { margin: 30px 0 5px; font-size: clamp(1.25rem,2vw,1.65rem); font-weight: 500; letter-spacing: -.025em; }
.hero-focus { margin: 0; color: var(--muted); font-size: clamp(.76rem, 1.2vw, .91rem); font-weight: 600; letter-spacing: .04em; }
.hero-focus i { margin: 0 .45em; color: #99b4cf; font-style: normal; }
.hero-intro { max-width: 590px; margin: 25px 0 34px; color: var(--ink-2); font-family: var(--serif); font-size: clamp(1.05rem, 1.5vw, 1.2rem); line-height: 1.6; }
.hero-actions { display: flex; gap: 10px; flex-wrap: wrap; }
.button { min-height: 44px; display: inline-flex; align-items: center; justify-content: center; gap: 18px; padding: 10px 18px; border: 1px solid var(--line); border-radius: 5px; font-size: .74rem; font-weight: 700; letter-spacing: .055em; transition: transform .2s, color .2s, background .2s, border-color .2s, box-shadow .2s; }
.button:hover { transform: translateY(-2px); }
.button-primary { color: white; background: var(--accent); border-color: var(--accent); box-shadow: 0 8px 20px rgba(25,87,200,.18); }
.button-primary:hover { background: var(--accent-hover); box-shadow: 0 11px 25px rgba(25,87,200,.24); }
.button-secondary { background: rgba(255,255,255,.75); }
.button-secondary:hover { color: var(--accent); border-color: var(--accent); }
.button-text { border-color: transparent; }
.scroll-cue { position: absolute; left: 24px; top: calc(100% + 55px); display: flex; gap: 12px; color: var(--muted); font-size: .68rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
.scroll-cue b { color: var(--accent); animation: bob 1.8s infinite; }
.hero-bg span { position: absolute; border: 1px solid rgba(29,78,216,.1); border-radius: 50%; }
.hero-bg span:nth-child(1) { width: 520px; height: 520px; right: -140px; top: 13%; }
.hero-bg span:nth-child(2) { width: 320px; height: 320px; right: -40px; top: 28%; }
.hero-bg span:nth-child(3) { width: 10px; height: 10px; right: 19%; top: 28%; background: var(--accent); box-shadow: 0 0 0 10px rgba(29,78,216,.1); }

/* ---------- Shared sections ---------- */
.section { padding: clamp(96px, 10vw, 144px) 0; }
.section-tinted { background: linear-gradient(180deg, #f7f9fc, var(--tint)); }
.section-dark { color: white; background: var(--dark); }
.section-heading h2, .section-top h2, .contact-inner h2 { max-width: 760px; margin: 0; font-family: var(--serif); font-size: clamp(2.4rem, 4.4vw, 4.15rem); font-weight: 400; line-height: 1.07; letter-spacing: -.045em; text-wrap: balance; }
.section-top { display: flex; align-items: flex-start; justify-content: space-between; margin-bottom: clamp(48px, 5vw, 72px); }
.split-layout { display: grid; grid-template-columns: minmax(280px,.85fr) minmax(0,1.15fr); gap: clamp(60px, 9vw, 130px); }
.section-heading { position: relative; }
.about-copy { max-width: 700px; }
.about-copy .lead { margin-top: 0; color: var(--ink); font-family: var(--serif); font-size: clamp(1.3rem,2vw,1.68rem); line-height: 1.55; letter-spacing: -.012em; }
.about-copy > p:not(.lead) { color: var(--muted); }
.placeholder-note { padding-left: 18px; border-left: 2px solid var(--accent); font-size: .9rem; }
.placeholder-note strong { color: var(--ink); }
.topic-list { display: flex; flex-wrap: wrap; gap: 8px; margin: 30px 0 0; padding: 0; list-style: none; }
.topic-list li { padding: 6px 11px; color: var(--ink-2); background: var(--tint); border: 1px solid var(--line); border-radius: 20px; font-size: .72rem; font-weight: 650; }

/* ---------- News ---------- */
.news-list { border-top: 1px solid var(--line); }
.news-item { position: relative; display: grid; grid-template-columns: 130px 1fr; gap: 34px; padding: 34px 0; border-bottom: 1px solid var(--line); transition: padding .25s, background .25s; }
.news-item:hover { padding-inline: 14px; background: rgba(255,255,255,.65); }
.news-item time { color: var(--accent); font-family: Georgia,serif; font-size: 1.15rem; }
.news-item h3 { margin: 0 0 5px; font-family: var(--serif); font-size: 1.28rem; font-weight: 500; letter-spacing: -.01em; }
.news-item p { margin: 0; color: var(--muted); font-size: .9rem; }

/* ---------- Interests ---------- */
.interest-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 16px; }
.interest-card { position: relative; min-height: 285px; padding: 32px; background: #fbfcfe; border: 1px solid var(--line); border-radius: var(--radius); transition: transform .25s, box-shadow .25s, background .25s, border-color .25s; }
.interest-card:hover { z-index: 2; transform: translateY(-4px); background: white; border-color: #c9d7e4; box-shadow: var(--shadow); }
.card-icon { width: 44px; height: 44px; display: grid; place-items: center; margin-bottom: 48px; color: var(--accent); background: var(--accent-light); border-radius: 50%; font-size: 1.22rem; }
.interest-card h3 { margin: 0 0 10px; font-family: var(--serif); font-size: 1.28rem; font-weight: 500; letter-spacing: -.01em; }
.interest-card p { margin: 0; color: var(--muted); font-size: .86rem; }

/* ---------- Projects ---------- */
.section-dark .kicker { color: #79a7ff; }
.section-dark h2 em { color: #79a7ff; }
.project-grid { display: grid; grid-template-columns: minmax(0, 700px); gap: 32px; }
.project-card { overflow: hidden; color: var(--ink); background: white; border: 1px solid rgba(255,255,255,.08); border-radius: 12px; box-shadow: 0 16px 40px rgba(0,0,0,.12); transition: transform .3s ease, box-shadow .3s ease; }
.project-card:hover { transform: translateY(-5px); box-shadow: 0 24px 55px rgba(0,0,0,.2); }
.project-visual { position: relative; overflow: hidden; background: #101f2d; line-height: 0; }
.project-visual img { display: block; width: 100% !important; min-width: 100%; max-width: none; height: auto !important; }
.visual-label { position: absolute; z-index: 4; left: 20px; top: 18px; color: rgba(255,255,255,.85); font-size: .63rem; font-weight: 700; letter-spacing: .16em; text-transform: uppercase; }
.project-body { padding: 31px 32px 33px; }
.project-type { margin: 0 0 10px; color: var(--accent); font-size: .65rem; font-weight: 750; letter-spacing: .1em; text-transform: uppercase; }
.project-body h3 { margin: 0 0 10px; font-family: var(--serif); font-size: 1.5rem; line-height: 1.25; font-weight: 500; letter-spacing: -.015em; }
.project-body > p:not(.project-type) { min-height: 52px; margin: 0 0 24px; color: var(--muted); font-size: .85rem; }
.project-body a { display: inline-flex; gap: 10px; padding-bottom: 2px; border-bottom: 1px solid transparent; font-size: .72rem; font-weight: 750; letter-spacing: .05em; transition: color .2s, border-color .2s; }
.project-body a:hover { color: var(--accent); border-color: var(--accent); }
.project-body a span { color: var(--accent); }

/* ---------- Publications & experience ---------- */
.publication-item { display: grid; grid-template-columns: 130px 1fr; gap: 34px; padding: 38px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.publication-year { color: var(--accent); font-family: var(--serif); font-size: 1.1rem; }
.publication-copy { max-width: 800px; }
.publication-venue { margin: 0 0 8px; color: var(--accent); font-size: .68rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
.publication-copy h3 { margin: 0 0 10px; font-family: var(--serif); font-size: clamp(1.35rem, 2.2vw, 1.8rem); line-height: 1.4; font-weight: 500; letter-spacing: -.015em; }
.publication-copy > p:not(.publication-venue, .publication-note) { margin: 0; color: var(--ink-2); font-size: .87rem; }
.publication-note { margin: 10px 0 0; color: var(--muted); font-size: .84rem; }
.experience-list { border-top: 1px solid var(--line); }
.experience-item { display: grid; grid-template-columns: 260px 1fr; gap: clamp(35px,6vw,85px); padding: 42px 0; border-bottom: 1px solid var(--line); }
.experience-meta { display:flex; flex-direction:column; align-items:flex-start; gap:8px }
.experience-meta span { padding: 4px 9px; color: var(--accent); background: var(--accent-light); font-size: .63rem; font-weight:750; letter-spacing:.1em; text-transform:uppercase; }
.experience-meta time { color: var(--muted); font-family: Georgia,serif; font-size:.9rem; }
.experience-item h3 { margin:0; font-family:var(--serif); font-size:1.4rem; font-weight:500; letter-spacing:-.01em; }
.experience-item .institution { margin:3px 0 10px; color:var(--accent); font-size:.78rem; font-weight:650; }
.experience-item div:last-child > p:last-child { margin:0; color:var(--muted); font-size:.86rem; }

/* ---------- Contact & footer ---------- */
.contact-section { color:white; background:linear-gradient(130deg,#0d2a40,#091f32); }
.contact-inner { display:grid; grid-template-columns:1.05fr .95fr; gap:clamp(70px,10vw,145px); align-items:center; }
.contact-inner h2 em { color:#79a7ff; }
.contact-inner > div:first-child > p:not(.kicker) { max-width:590px; color:#b9c9d8; }
.contact-email { display:inline-flex;gap:20px;margin-top:22px;padding-bottom:5px;border-bottom:1px solid #79a7ff;color:white;font-family:var(--serif);font-size:1.08rem;transition:color .2s,gap .2s}
.contact-email:hover { color:#a9c8ff;gap:25px }
.contact-email span{color:#79a7ff}
.contact-links { border-top:1px solid #38516a; }
.contact-links a { display:grid; grid-template-columns:35px 1fr auto; gap:15px; align-items:center; padding:17px 3px; border-bottom:1px solid #38516a; transition:padding .2s,background .2s; }
.contact-links a:hover { padding-inline:10px; background:rgba(255,255,255,.03); }
.contact-links svg { width:23px;height:23px;fill:none;stroke:#79a7ff;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}.contact-links a:nth-child(2) svg{fill:#79a7ff;stroke:none}
.contact-links span { display:flex;flex-direction:column;line-height:1.3}.contact-links b{font-size:.8rem}.contact-links small{color:#8ea6bb;font-size:.67rem}.contact-links i{color:#79a7ff;font-style:normal}
footer { color:#7890a6; background:#091a2a; }
.footer-inner { min-height:85px;display:flex;justify-content:space-between;align-items:center;font-size:.68rem;letter-spacing:.05em }
.to-top { position:fixed;z-index:50;right:25px;bottom:25px;width:42px;height:42px;border:0;border-radius:50%;color:white;background:var(--accent);box-shadow:0 7px 22px rgba(29,78,216,.3);cursor:pointer;opacity:0;visibility:hidden;transform:translateY(10px);transition:.25s}
.to-top.visible { opacity:1;visibility:visible;transform:none }

/* ---------- Motion & responsive ---------- */
.reveal { opacity: 1; transform: none; }
.js .reveal { opacity:0; transform:translateY(16px); transition:opacity .7s cubic-bezier(.2,.7,.2,1),transform .7s cubic-bezier(.2,.7,.2,1); }
.js .reveal.visible { opacity:1; transform:none; }
@keyframes bob { 50% { transform:translateY(6px); } }
@media (prefers-reduced-motion: reduce) { html{scroll-behavior:auto}.js .reveal{opacity:1;transform:none;transition:none}.scroll-cue b{animation:none}*{transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important} }

@media (max-width: 900px) {
  .nav-toggle { display:block;position:relative;z-index:3 }
  .nav-toggle.open span:nth-child(1){transform:translateY(6.5px) rotate(45deg)}.nav-toggle.open span:nth-child(2){opacity:0}.nav-toggle.open span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg)}
  .nav-links { position:fixed;inset:0 0 0 25%;display:flex;flex-direction:column;align-items:flex-start;justify-content:center;gap:26px;padding:60px;background:white;box-shadow:-10px 0 35px rgba(16,42,67,.1);visibility:hidden;transform:translateX(105%);transition:transform .3s,visibility 0s .3s }
  .nav-links.open { visibility:visible;transform:none;transition-delay:0s; }
  .nav-links a { font-family:Georgia,serif;font-size:1.35rem;font-weight:500 }
  .nav-contact { font-family:var(--sans)!important;font-size:.8rem!important }
  .split-layout,.contact-inner { grid-template-columns:1fr;gap:55px }
  .interest-grid { grid-template-columns:repeat(2,1fr) }
  .no-js .nav { height: auto; min-height: 66px; flex-wrap: wrap; gap: 8px; padding-block: 10px; }
  .no-js .nav-toggle { display: none; }
  .no-js .nav-links { position: static; width: 100%; visibility: visible; transform: none; flex-direction: row; flex-wrap: wrap; align-items: center; justify-content: flex-start; gap: 10px 16px; padding: 0; box-shadow: none; }
  .no-js .nav-links a { font-family: var(--sans); font-size: .7rem; }
}
@media (max-width: 640px) {
  .container { width:min(calc(100% - 34px),var(--max)) }
  .nav { height:66px }.nav-links{inset:0 0 0 15%;padding:44px}.site-header.scrolled{background:white}
  .hero { min-height:100svh;padding:110px 0 70px;background:linear-gradient(155deg,#fff 0%,#fff 68%,#f1f6fc 68%) }
  .hero h1 { font-size:clamp(3.5rem,18vw,5.3rem) }
  .hero-focus { max-width:330px;line-height:2 }.hero-intro{font-size:1rem}.hero-actions{gap:7px}.button{padding:10px 13px;gap:10px}.button-text{padding-inline:7px}
  .scroll-cue{display:none}.hero-bg span:nth-child(1){width:280px;height:280px;right:-150px}.hero-bg span:nth-child(2){display:none}
  .section { padding:82px 0 }.section-top{margin-bottom:42px}
  .split-layout { gap:38px }.section-heading h2,.section-top h2,.contact-inner h2{font-size:2.55rem}
  .about-copy .lead{font-size:1.2rem}
  .news-item{grid-template-columns:60px 1fr;gap:15px;padding:25px 0}.news-item h3{font-size:1.1rem}
  .interest-grid,.project-grid { grid-template-columns:1fr }.interest-card{min-height:auto;padding:27px}.card-icon{margin-bottom:30px}
  .project-grid{gap:20px}.project-body{padding:25px}.project-body>p:not(.project-type){min-height:0}
  .publication-item{grid-template-columns:1fr;gap:12px;padding:30px 0}.publication-copy h3{font-size:1.25rem}
  .experience-item{grid-template-columns:1fr;gap:20px;padding:30px 0}.experience-meta{flex-direction:row;align-items:center;justify-content:space-between}
  .contact-inner{gap:50px}.contact-email{font-size:.95rem}
  .footer-inner{min-height:100px;flex-direction:column;justify-content:center;gap:3px;text-align:center}.footer-inner p{margin:0}
  .to-top{right:16px;bottom:16px}
}