/* ---------- tokens ---------- */
:root {
  --paper: #f3f2ee;
  --paper-2: #fbfaf7;
  --ink: #16171b;
  --ink-2: #4a4d55;
  --ink-3: #7f828a;
  --line: #dedcd5;
  --uv: #5b3fd1;
  --uv-soft: #ece8fb;
  --green: #1d8a59;
  --stim: #17181c;
  --stim-ring: transparent;
  --serif: "Newsreader", "Iowan Old Style", Georgia, serif;
  --sans: "IBM Plex Sans", system-ui, -apple-system, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, Menlo, monospace;
  --wrap: 1160px;
  --gutter: 28px;
  color-scheme: light;
}
/* dark is the default; light only when the visitor picks it with the toggle */
:root:not([data-theme="light"]) {
  --paper: #0d0e12; --paper-2: #15171c; --ink: #ecebe6; --ink-2: #b4b5bb; --ink-3: #7c7f88;
  --line: #282a31; --uv: #9d86ff; --uv-soft: #221d3a; --green: #4cc38a; --stim: #000000; --stim-ring: #575a66;
  color-scheme: dark;
}

/* ---------- base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font: 400 17px/1.6 var(--sans); -webkit-font-smoothing: antialiased;
  transition: background-color .3s, color .3s;
}
a { color: inherit; text-decoration-color: color-mix(in srgb, currentColor 35%, transparent); text-underline-offset: 3px; }
a:hover { color: var(--uv); text-decoration-color: currentColor; }
h1, h2, h3 { font-family: var(--serif); font-weight: 400; letter-spacing: -0.015em; margin: 0; }
h2 { font-size: clamp(30px, 4vw, 44px); line-height: 1.1; }
p { margin: 0 0 1em; }
button { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid var(--uv); outline-offset: 3px; border-radius: 4px; }
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 var(--gutter); }
.eyebrow {
  font: 500 12px/1 var(--mono); letter-spacing: .16em; text-transform: uppercase;
  color: var(--ink-3); margin: 0 0 18px;
}

/* ---------- nav ---------- */
.nav {
  position: fixed; inset: 0 0 auto; z-index: 20; height: 60px;
  background: color-mix(in srgb, var(--paper) 78%, transparent);
  backdrop-filter: blur(12px) saturate(1.2); -webkit-backdrop-filter: blur(12px) saturate(1.2);
  border-bottom: 1px solid color-mix(in srgb, var(--line) 70%, transparent);
}
.nav-inner { height: 100%; display: flex; align-items: center; justify-content: space-between; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; font: 500 13px/1 var(--mono); letter-spacing: .14em; text-transform: uppercase; }
.brand svg { width: 26px; height: 26px; fill: none; stroke: var(--uv); stroke-width: 2.2; }
.brand svg .surround { stroke-dasharray: 2 3; stroke-width: 1.2; opacity: .6; }
.brand svg circle { fill: var(--ink); stroke: none; }
.nav nav { display: flex; align-items: center; gap: 26px; font-size: 14.5px; }
.nav nav a { text-decoration: none; color: var(--ink-2); }
.nav nav a:hover { color: var(--ink); }
.theme-toggle { background: none; border: 0; padding: 4px; cursor: pointer; display: grid; place-items: center; }
.theme-toggle svg { width: 18px; height: 18px; fill: none; stroke: var(--ink-2); stroke-width: 1.6; }
.theme-toggle svg path { fill: var(--ink-2); stroke: none; }

/* ---------- hero ---------- */
.hero { position: relative; min-height: 100vh; min-height: 100svh; overflow: hidden; display: flex; flex-direction: column; justify-content: center; padding: 110px 0 150px; border-bottom: 1px solid var(--line); }
#mosaic { position: absolute; inset: 0; width: 100%; height: 100%; display: block; cursor: crosshair; }
.hero-fade {
  position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(90deg, var(--paper) 0%, color-mix(in srgb, var(--paper) 92%, transparent) 30%, color-mix(in srgb, var(--paper) 30%, transparent) 55%, transparent 72%);
}
.hero-inner { position: relative; width: 100%; pointer-events: none; }
.hero-inner > * { pointer-events: auto; max-width: 560px; }
.hero-inner > h1 { max-width: 820px; }
.hero h1 { font-size: clamp(42px, 5.6vw, 78px); line-height: 1.0; letter-spacing: -0.03em; margin-bottom: 22px; }
.hero-sub { font-family: var(--serif); font-style: italic; font-size: 22px; color: var(--ink-2); margin-bottom: 18px; }
.hero-sub span:nth-child(1) { color: var(--ink); }
.hero-sub span:nth-child(2) { color: var(--uv); }
.hero-sub span:nth-child(3) { color: var(--green); }
.hero-lede { color: var(--ink-2); font-size: 17px; max-width: 520px; margin-bottom: 26px; }
.social { list-style: none; padding: 0; margin: 0; display: flex; gap: 18px; flex-wrap: wrap; font: 400 13px/1 var(--mono); }
.social a { text-decoration: none; color: var(--ink-2); display: inline-flex; gap: 6px; align-items: center; }
.social a:hover { color: var(--uv); }
.social svg { width: 15px; height: 15px; fill: currentColor; }

.raster-wrap { position: absolute; left: 0; right: 0; bottom: 40px; height: 64px; pointer-events: none; }
.raster-wrap::before { content: ""; position: absolute; inset: -26px 0 -40px; background: linear-gradient(180deg, transparent, color-mix(in srgb, var(--paper) 88%, transparent) 30%); }
#raster { position: relative; }
#raster { width: 100%; height: 100%; display: block; }
.raster-label { position: absolute; left: max(var(--gutter), calc((100% - var(--wrap)) / 2 + var(--gutter))); top: -18px; font: 400 11px/1 var(--mono); color: var(--ink-3); letter-spacing: .06em; }
.hero-caption { position: absolute; bottom: 12px; left: 0; right: 0; margin: 0 auto; max-width: var(--wrap); padding: 0 var(--gutter); font: 400 11.5px/1.4 var(--mono); color: var(--ink-3); pointer-events: none; }
.sw { display: inline-block; width: 9px; height: 9px; border-radius: 50%; border: 1.5px solid; vertical-align: -1px; }
.sw-off { border-color: var(--uv); background: color-mix(in srgb, var(--uv) 30%, transparent); }
.sw-on { border-color: var(--green); background: color-mix(in srgb, var(--green) 30%, transparent); }

/* ---------- sections ---------- */
.section { padding: 120px 0; border-bottom: 1px solid var(--line); }
.section-head { margin-bottom: 52px; max-width: 680px; }
.section-sub { color: var(--ink-2); margin-top: 14px; }
.two-col { display: grid; grid-template-columns: minmax(0, 4fr) minmax(0, 7fr); gap: 56px; align-items: start; }
.two-col .section-head { margin-bottom: 0; position: sticky; top: 100px; }

/* about */
.about { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 72px; align-items: center; }
.portrait { margin: 0; display: grid; place-items: center; }
.rf { position: relative; width: min(100%, 380px); aspect-ratio: 1; }
.rf img { width: 100%; height: 100%; object-fit: cover; border-radius: 50%; position: relative; z-index: 1; }
.rf::before, .rf::after { content: ""; position: absolute; border-radius: 50%; pointer-events: none; }
.rf::before { inset: -9%; border: 1.5px dashed color-mix(in srgb, var(--uv) 55%, transparent); animation: spin 90s linear infinite; }
.rf::after { inset: -20%; border: 1px solid color-mix(in srgb, var(--line) 80%, transparent); }
@keyframes spin { to { transform: rotate(360deg); } }
.about h2 { margin-bottom: 26px; }
.lead { font-family: var(--serif); font-size: 22px; line-height: 1.45; color: var(--ink); }
.about-text > p:not(.lead):not(.eyebrow) { color: var(--ink-2); }
.previously { margin: 30px 0 0; padding: 22px 0 0; border-top: 1px solid var(--line); font-size: 15px; color: var(--ink-2); }
.previously dt { font: 500 11px/1 var(--mono); letter-spacing: .14em; text-transform: uppercase; color: var(--ink-3); margin-bottom: 12px; }
.previously dd { margin: 0 0 6px; padding-left: 18px; position: relative; }
.previously dd::before { content: ""; position: absolute; left: 2px; top: .7em; width: 7px; height: 5px; border: 1px solid var(--ink-3); border-radius: 50%; transform: rotate(-25deg); }

/* research pillars */
.pillars { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.pillar { background: var(--paper-2); border: 1px solid var(--line); border-radius: 18px; overflow: hidden; display: flex; flex-direction: column; transition: transform .35s cubic-bezier(.2,.7,.2,1), box-shadow .35s; }
.pillar:hover { transform: translateY(-4px); box-shadow: 0 18px 40px -24px color-mix(in srgb, var(--ink) 40%, transparent); }
.pillar-top { position: relative; padding: 22px 24px 18px; border-bottom: 1px solid var(--line); }
.pillar-top .num { font: 400 12px/1 var(--mono); color: var(--ink-3); }
.pillar-top h3 { font-size: 38px; margin: 14px 0 6px; }
.pillar-top .q { font-size: 14px; color: var(--ink-2); font-style: italic; margin: 0; }
.pillar-glyph { position: absolute; top: 16px; right: 18px; width: 92px; height: 92px; }
.pillar-body { padding: 22px 24px 24px; display: flex; flex-direction: column; flex: 1; }
.pillar-body h4 { font: 600 17px/1.3 var(--sans); margin: 0 0 10px; }
.pillar-body p { font-size: 15px; color: var(--ink-2); }
.pillar-body .venues { font: 400 12px/1.4 var(--mono); color: var(--ink-3); margin-top: auto; padding-top: 6px; }
.links { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.links a { font-size: 13px; text-decoration: none; padding: 5px 11px; border: 1px solid var(--line); border-radius: 999px; color: var(--ink-2); }
.links a:hover { border-color: var(--uv); color: var(--uv); }
.pillar[data-key="statistics"] .pillar-top { background: linear-gradient(160deg, color-mix(in srgb, var(--ink) 5%, transparent), transparent 70%); }
.pillar[data-key="symmetry"] .pillar-top { background: linear-gradient(160deg, color-mix(in srgb, var(--uv) 12%, transparent), transparent 70%); }
.pillar[data-key="information"] .pillar-top { background: linear-gradient(160deg, color-mix(in srgb, var(--green) 12%, transparent), transparent 70%); }

/* publications */
.pub-controls { display: flex; gap: 8px; align-items: center; margin-top: 22px; flex-wrap: wrap; }
.pub-controls button { background: none; border: 1px solid var(--line); border-radius: 999px; padding: 6px 14px; font-size: 13px; cursor: pointer; color: var(--ink-2); }
.pub-controls button[aria-pressed="true"] { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.pub-controls .ext { margin-left: 8px; font-size: 13px; color: var(--ink-3); text-decoration: none; }
.pubs { list-style: none; padding: 0; margin: 0; border-top: 1px solid var(--line); }
.pub { display: grid; grid-template-columns: 70px 14px minmax(0, 1fr) auto; gap: 18px; padding: 22px 0; border-bottom: 1px solid var(--line); align-items: baseline; }
.pub[hidden] { display: none; }
.pub .yr { font: 400 13px/1.5 var(--mono); color: var(--ink-3); }
.pub .dot { width: 10px; height: 7px; border-radius: 50%; border: 1.5px solid var(--ink-3); transform: rotate(-25deg) translateY(-1px); align-self: center; }
.pub[data-tag="statistics"] .dot { border-color: var(--ink); background: color-mix(in srgb, var(--ink) 20%, transparent); }
.pub[data-tag="symmetry"] .dot { border-color: var(--uv); background: color-mix(in srgb, var(--uv) 25%, transparent); }
.pub[data-tag="information"] .dot { border-color: var(--green); background: color-mix(in srgb, var(--green) 25%, transparent); }
.pub h3 { font-size: 21px; line-height: 1.3; margin-bottom: 6px; }
.pub .au { font-size: 14px; color: var(--ink-2); margin: 0; }
.pub .au b { font-weight: 600; color: var(--ink); }
.pub .ve { font: 400 12.5px/1.5 var(--mono); color: var(--ink-3); margin-top: 6px; }
.pub .hl { color: var(--uv); margin-left: 8px; }
.pub .links { margin-top: 0; justify-content: flex-end; }

/* timeline + news + writing */
.timeline, .news, .writing { list-style: none; padding: 0; margin: 0; border-top: 1px solid var(--line); }
.timeline li, .news li, .writing li { display: grid; grid-template-columns: 96px minmax(0, 1fr); gap: 20px; padding: 16px 0; border-bottom: 1px solid var(--line); }
.timeline .when, .news .when, .writing .when { font: 400 12.5px/1.6 var(--mono); color: var(--ink-3); }
.timeline .what { font-size: 16px; }
.timeline .where { display: inline-block; font: 500 11px/1 var(--mono); letter-spacing: .08em; text-transform: uppercase; padding: 4px 7px; border-radius: 5px; margin-right: 10px; vertical-align: 2px; background: var(--uv-soft); color: var(--uv); }
.timeline .where[data-v="CoSyNe"] { background: color-mix(in srgb, var(--green) 14%, transparent); color: var(--green); }
.timeline .where[data-v="Bernstein"] { background: color-mix(in srgb, var(--ink) 8%, transparent); color: var(--ink-2); }
.timeline a, .news a, .writing a { text-decoration: none; }
.timeline a:hover, .news a:hover, .writing a:hover { text-decoration: underline; }
.news li[hidden] { display: none; }
.more { margin-top: 18px; background: none; border: 1px solid var(--line); border-radius: 999px; padding: 7px 16px; font-size: 13px; cursor: pointer; color: var(--ink-2); }
.more:hover { border-color: var(--uv); color: var(--uv); }

/* footer */
.footer { padding: 90px 0 70px; }
.footer-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: end; }
.footer-big { font-family: var(--serif); font-size: clamp(36px, 5vw, 56px); line-height: 1; margin-bottom: 14px; }
.footer a { font: 400 15px/1 var(--mono); }
.footer-note { color: var(--ink-2); font-size: 16px; line-height: 1.65; max-width: 480px; margin-bottom: 18px; }
.colophon { font: 400 12px/1.6 var(--mono); color: var(--ink-3); margin: 0; }

/* reveal on scroll */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .8s cubic-bezier(.2,.7,.2,1), transform .8s cubic-bezier(.2,.7,.2,1); }
.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .rf::before { animation: none; }
  .pillar { transition: none; }
}

/* ---------- responsive ---------- */
@media (max-width: 980px) {
  .pillars { grid-template-columns: 1fr; }
  .two-col, .about, .footer-inner { grid-template-columns: 1fr; gap: 36px; }
  .two-col .section-head { position: static; }
  .rf { width: min(70%, 300px); }
}
@media (max-width: 760px) {
  :root { --gutter: 16px; }
  body { font-size: 16px; }
  .eyebrow { letter-spacing: .1em; font-size: 11px; }
  .nav nav a:not([href="/files/cv.pdf"]) { display: none; }
  .hero { padding: 96px 0 140px; justify-content: flex-start; }
  .hero-fade { background: linear-gradient(180deg, var(--paper) 0%, color-mix(in srgb, var(--paper) 90%, transparent) 55%, color-mix(in srgb, var(--paper) 40%, transparent) 75%, transparent 90%); }
  .section { padding: 80px 0; }
  .pub { grid-template-columns: 1fr; gap: 6px; }
  .pub .dot { display: none; }
  .pub .links { justify-content: flex-start; margin-top: 8px; }
  .timeline li, .news li, .writing li { grid-template-columns: 1fr; gap: 4px; }
  .hero-caption { font-size: 10.5px; }
}