:root {
  --canvas: #f6f7f4;
  --surface: #ffffff;
  --ink: #172033;
  --muted: #596577;
  --accent: #315a7d;
  --accent-dark: #1e405d;
  --accent-pale: #e9f0f4;
  --border: #d8dfe5;
  --soft: #edf1f3;
  --shadow: 0 18px 40px rgb(23 32 51 / 7%);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--canvas);
  font-family: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.62;
  text-rendering: optimizeLegibility;
}

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

a { color: var(--accent-dark); text-decoration-color: rgb(49 90 125 / 45%); text-underline-offset: .16em; }
a:hover { color: var(--accent); text-decoration-color: currentColor; }
a:focus-visible { outline: 3px solid #8ab2cf; outline-offset: 4px; border-radius: 2px; }

.shell { width: min(1120px, calc(100% - 3rem)); margin-inline: auto; }

.skip-link { position: fixed; top: .75rem; left: .75rem; z-index: 20; padding: .65rem .9rem; color: #fff; background: var(--accent-dark); transform: translateY(-160%); }
.skip-link:focus { transform: translateY(0); }

.site-header { position: sticky; top: 0; z-index: 10; border-bottom: 1px solid rgb(216 223 229 / 85%); background: rgb(246 247 244 / 92%); backdrop-filter: blur(12px); }
.nav-shell { display: flex; align-items: center; justify-content: space-between; min-height: 4.9rem; gap: 1.5rem; }
.brand { display: inline-flex; align-items: center; gap: .65rem; color: var(--ink); font-size: .94rem; font-weight: 700; letter-spacing: -.01em; text-decoration: none; white-space: nowrap; }
.brand:hover { color: var(--ink); }
.brand-mark { display: grid; width: 2rem; height: 2rem; place-items: center; border-radius: 50%; color: #fff; background: var(--accent); font-size: .58rem; letter-spacing: .04em; }
.site-nav { display: flex; align-items: center; gap: 1.2rem; font-size: .91rem; font-weight: 600; }
.site-nav a { color: var(--muted); text-decoration: none; }
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--accent-dark); }
.site-nav .nav-cta { padding: .4rem .72rem; border: 1px solid var(--accent); border-radius: 4px; color: var(--accent-dark); }

.hero { display: grid; grid-template-columns: minmax(0, 1.12fr) minmax(280px, .88fr); align-items: center; gap: clamp(2.5rem, 6vw, 5.5rem); padding-block: clamp(4rem, 7vw, 6.5rem); }
.eyebrow, .section-kicker { margin: 0 0 .75rem; color: var(--accent); font-size: .74rem; font-weight: 750; letter-spacing: .13em; text-transform: uppercase; }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { color: var(--ink); line-height: 1.13; letter-spacing: -.037em; }
h1 { max-width: 800px; margin-bottom: 1.4rem; font-size: clamp(3.1rem, 5.5vw, 5rem); }
h2 { margin-bottom: 1.2rem; font-size: clamp(2rem, 3.6vw, 3.2rem); }
h3 { margin-bottom: .75rem; font-size: 1.33rem; }
.hero-lead { max-width: 680px; margin-bottom: 1rem; font-size: clamp(1.3rem, 2.1vw, 1.68rem); font-weight: 500; line-height: 1.45; }
.hero-support { max-width: 650px; margin-bottom: 1.8rem; color: var(--muted); font-size: 1.04rem; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 2.85rem; padding: .7rem 1rem; border: 1px solid transparent; border-radius: 4px; font-weight: 700; line-height: 1.2; text-decoration: none; transition: background-color .18s ease, color .18s ease, border-color .18s ease; }
.button-primary { color: #fff; background: var(--accent-dark); }
.button-primary:hover { color: #fff; background: var(--accent); }
.hero-links { display: flex; flex-wrap: wrap; gap: .45rem 1.2rem; margin: 0 0 1rem; padding: 0; font-size: .92rem; font-weight: 700; list-style: none; }
.hero-links li:not(:last-child)::after { margin-left: 1.2rem; color: var(--border); content: "·"; }
.profile-links { display: flex; flex-wrap: wrap; gap: .35rem 1rem; margin: 0; padding: 0; color: var(--muted); font-size: .88rem; list-style: none; }
.profile-links li:not(:last-child)::after { margin-left: 1rem; color: var(--border); content: "•"; }
.profile-links-secondary { font-size: .82rem; }

.hero-visual { position: relative; max-width: 370px; justify-self: end; width: 100%; }
.graph-motif { position: absolute; z-index: 0; top: -12%; right: -16%; width: 112%; height: 112%; opacity: .75; }
.motif-lines { fill: none; stroke: #adc2d0; stroke-width: 2; }
.motif-nodes { fill: #b2c8d7; }
.portrait-frame { position: relative; z-index: 1; margin: 0; overflow: hidden; border: 9px solid var(--surface); border-radius: 2px 36px 2px 36px; background: var(--soft); box-shadow: var(--shadow); }
.portrait-frame img { width: 100%; aspect-ratio: 1; object-fit: cover; }

.section { padding-block: clamp(4rem, 8vw, 7rem); }
.section-muted { background: var(--soft); }
.split-layout { display: grid; grid-template-columns: minmax(250px, .8fr) minmax(0, 1.2fr); gap: clamp(2rem, 8vw, 9rem); }
.split-layout h2 { max-width: 470px; margin-bottom: 0; }
.prose-large { max-width: 680px; color: var(--muted); font-size: 1.08rem; }
.prose-large p:last-child { margin-bottom: 0; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 2rem; margin-bottom: 2.6rem; }
.section-heading h2 { max-width: 680px; margin-bottom: 0; }
.section-intro { max-width: 440px; margin: 0; color: var(--muted); font-size: .98rem; }
.research-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.2rem; }
.research-card { display: flex; flex-direction: column; padding: 1.65rem; border: 1px solid var(--border); border-radius: 5px; background: var(--surface); box-shadow: 0 5px 14px rgb(23 32 51 / 3%); }
.card-topline { display: flex; justify-content: space-between; gap: .75rem; align-items: baseline; margin-bottom: 2.3rem; }
.card-venue { color: var(--accent); font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .78rem; font-weight: 800; }
.card-tag { color: var(--muted); font-size: .75rem; font-weight: 700; letter-spacing: .055em; text-align: right; text-transform: uppercase; }
.research-card h3 { font-size: clamp(1.38rem, 2.4vw, 1.76rem); }
.research-card h3 span { color: var(--accent); white-space: nowrap; }
.research-card p { color: var(--muted); font-size: .96rem; }
.research-card .evidence { margin-top: auto; padding-top: 1rem; border-top: 1px solid var(--border); color: var(--ink); font-size: .91rem; font-weight: 570; }
.maintainer-note { margin-top: .25rem; color: var(--ink) !important; font-size: .87rem !important; font-weight: 620; }
.card-links, .publication-links { display: flex; flex-wrap: wrap; gap: .5rem 1.1rem; margin-top: auto; padding-top: 1rem; font-size: .88rem; font-weight: 750; }
.card-links a, .publication-links a { text-decoration-thickness: 1px; }
.publications-heading { align-items: center; }
.text-link { font-weight: 750; text-decoration-thickness: 1px; white-space: nowrap; }
.selected-publications, .publication-list { margin: 0; padding: 0; list-style: none; }
.selected-publications > li, .publication-list > li { display: grid; grid-template-columns: 4.6rem minmax(0, 1fr); gap: 1.2rem; padding-block: 1.35rem; border-top: 1px solid var(--border); }
.selected-publications > li:last-child, .publication-list > li:last-child { border-bottom: 1px solid var(--border); }
.publication-year { padding-top: .18rem; color: var(--accent); font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .84rem; font-weight: 800; }
.selected-publications h3, .publication-list h3 { margin-bottom: .35rem; font-size: 1.08rem; line-height: 1.36; letter-spacing: -.018em; }
.selected-publications p, .publication-list p { margin-bottom: 0; color: var(--muted); font-size: .91rem; }
.contact-block { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: end; gap: 2rem; padding-top: clamp(2rem, 4vw, 3.5rem); border-top: 1px solid var(--border); }
.contact-block h2 { margin-bottom: .65rem; font-size: clamp(1.8rem, 3vw, 2.5rem); }
.contact-block p { max-width: 680px; margin-bottom: 0; color: var(--muted); }
.contact-links { justify-content: flex-end; padding-bottom: .3rem; }

.site-footer { padding-block: 2rem; border-top: 1px solid var(--border); color: var(--muted); font-size: .84rem; }
.site-footer p { margin: 0; }

.page-hero { padding-block: clamp(5rem, 10vw, 9rem) clamp(3.5rem, 7vw, 6rem); }
.page-hero h1 { margin-bottom: 1.15rem; }
.page-lead { max-width: 730px; margin-bottom: 1.65rem; color: var(--muted); font-size: clamp(1.15rem, 2.2vw, 1.45rem); line-height: 1.5; }
.profile-links-wide { font-size: .94rem; }
.publication-section { padding-top: 0; }
.publication-section.section-muted { padding-top: clamp(4rem, 8vw, 7rem); }
.compact-heading { margin-bottom: 1.5rem; }
.compact-heading h2 { font-size: clamp(1.8rem, 3vw, 2.5rem); }
.publication-list > li { padding-block: 1.65rem; }
.publication-list h3 { font-size: 1.18rem; }
.publication-list .authors { margin-bottom: .2rem; color: var(--ink); }
.publication-links { margin-top: .35rem; padding-top: 0; }
.service-section { padding-top: 0; }
.service-section h2 { margin-bottom: .7rem; font-size: clamp(1.8rem, 3vw, 2.5rem); }
.service-section p:last-child { max-width: 750px; margin-bottom: 0; color: var(--muted); }

.not-found-body { display: grid; min-height: 100vh; place-items: center; }
.not-found { padding-block: 4rem; }
.not-found h1 { max-width: 600px; font-size: clamp(3rem, 8vw, 6rem); }
.not-found p { max-width: 550px; margin-bottom: 2rem; color: var(--muted); font-size: 1.2rem; }

@media (max-width: 860px) {
  .hero { grid-template-columns: 1fr; }
  .hero-visual { justify-self: start; max-width: min(370px, 90%); margin-top: 1rem; }
  .research-grid { grid-template-columns: 1fr 1fr; }
  .research-card:last-child { grid-column: span 2; }
}

@media (max-width: 650px) {
  .shell { width: min(100% - 2.25rem, 1120px); }
  .nav-shell { min-height: 4.25rem; gap: .8rem; }
  .brand-name { display: none; }
  .site-nav { gap: .8rem; font-size: .8rem; }
  .site-nav .nav-cta { padding: .3rem .5rem; }
  .hero { padding-block: 4.2rem; gap: 2.3rem; }
  h1 { font-size: clamp(2.85rem, 13vw, 4rem); }
  .profile-links { gap: .3rem .7rem; }
  .profile-links li:not(:last-child)::after { margin-left: .7rem; }
  .split-layout, .section-heading { display: block; }
  .section-heading { margin-bottom: 2rem; }
  .section-intro { margin-top: 1rem; }
  .research-grid { grid-template-columns: 1fr; }
  .research-card:last-child { grid-column: auto; }
  .research-card { padding: 1.35rem; }
  .card-topline { margin-bottom: 1.7rem; }
  .contact-block { display: block; }
  .contact-links { justify-content: flex-start; margin-top: 1.25rem; }
  .selected-publications > li, .publication-list > li { grid-template-columns: 1fr; gap: .25rem; }
  .publication-year { padding-top: 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}