/* ==========================================================================
   Panchanan Nath — portfolio theme
   Concept: a circuit board. Indigo traces = academia, solder green = industry.
   Edit colours in the tokens below; everything else derives from them.
   ========================================================================== */

/* Self-hosted variable fonts (SIL OFL) — no third-party requests */
@font-face { font-family: "Bricolage Grotesque"; src: url("../fonts/bricolage-grotesque.woff2") format("woff2"); font-weight: 200 800; font-stretch: 75% 100%; font-style: normal; font-display: swap; }
@font-face { font-family: "Literata"; src: url("../fonts/literata.woff2") format("woff2"); font-weight: 200 900; font-style: normal; font-display: swap; }
@font-face { font-family: "Literata"; src: url("../fonts/literata-italic.woff2") format("woff2"); font-weight: 200 900; font-style: italic; font-display: swap; }

:root {
  --bg: #F3F5F4;          /* silkscreen white */
  --surface: #FFFFFF;
  --ink: #1C2430;         /* graphite */
  --ink-2: #4E5966;
  --ink-3: #6E7884;
  --rule: #C9D2D0;        /* pad grey */
  --rule-soft: #DFE5E3;
  --acad: #3B4CCA;        /* indigo trace */
  --acad-soft: #E6E9FB;
  --ind: #17795A;         /* solder green */
  --ind-soft: #DCF0E7;
  --signal: #D99A00;      /* pulse highlight */
  --dot: rgba(28, 36, 48, .085);
  --chip: #232D3B;
  --chip-ink: #F3F5F4;

  --font-display: "Bricolage Grotesque", "Avenir Next", "Segoe UI", system-ui, sans-serif;
  --font-text: "Literata", "Iowan Old Style", Georgia, serif;

  --wrap: 1120px;
  --gutter: clamp(16px, 4vw, 40px);
  --r-sm: 4px;
  --r-md: 10px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #111920; --surface: #17212A; --ink: #E4E9E8; --ink-2: #AEB8C2; --ink-3: #8994A0;
    --rule: #2E3C48; --rule-soft: #222F3A; --acad: #93A0FF; --acad-soft: rgba(147,160,255,.12);
    --ind: #52C99D; --ind-soft: rgba(82,201,157,.12); --signal: #F2C04A; --dot: rgba(228,233,232,.06);
    --chip: #E4E9E8; --chip-ink: #111920;
  }
}
:root[data-theme="dark"] {
  --bg: #111920; --surface: #17212A; --ink: #E4E9E8; --ink-2: #AEB8C2; --ink-3: #8994A0;
  --rule: #2E3C48; --rule-soft: #222F3A; --acad: #93A0FF; --acad-soft: rgba(147,160,255,.12);
  --ind: #52C99D; --ind-soft: rgba(82,201,157,.12); --signal: #F2C04A; --dot: rgba(228,233,232,.06);
  --chip: #E4E9E8; --chip-ink: #111920;
}

/* ---------- base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-text);
  font-size: 1.0625rem;
  line-height: 1.7;
  font-optical-sizing: auto;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration-color: color-mix(in srgb, currentColor 35%, transparent); text-underline-offset: .18em; text-decoration-thickness: 1px; }
a:hover { color: var(--acad); text-decoration-color: currentColor; }
:focus-visible { outline: 2px solid var(--signal); outline-offset: 3px; border-radius: 2px; }
p { margin: 0 0 .6em; }
h1, h2, h3 { font-family: var(--font-display); line-height: 1.1; margin: 0; font-weight: 650; letter-spacing: -.01em; }
ul, ol { margin: 0; padding: 0; list-style: none; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: 12px; top: -60px; background: var(--ink); color: var(--bg); padding: 8px 14px; z-index: 50; font-family: var(--font-display); }
.skip:focus { top: 12px; }
.muted { color: var(--ink-3); }
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 var(--gutter); }

.icon { width: 1.15em; height: 1.15em; flex: none; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }

/* ---------- header ---------- */
.site-head { position: sticky; top: 0; z-index: 20; background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: saturate(140%) blur(10px); border-bottom: 1px solid var(--rule-soft); }
.site-head__row { display: flex; align-items: center; gap: 16px; min-height: 64px; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-family: var(--font-display); font-weight: 650; font-size: 1.05rem; margin-right: auto; }
.brand:hover { color: inherit; }
.brand__chip { width: 28px; height: 28px; fill: none; stroke: currentColor; stroke-width: 1.6; }
.brand__chip rect { fill: var(--ink); stroke: none; }
.brand:hover .brand__chip path { stroke: var(--ind); }
.site-nav { display: flex; align-items: center; gap: 8px; font-family: var(--font-display); font-size: .95rem; }
.site-nav ul { display: flex; gap: 2px; }
.site-nav a { display: block; padding: 6px 10px; border-radius: var(--r-sm); text-decoration: none; color: var(--ink-2); }
.site-nav a:hover { color: var(--ink); background: var(--rule-soft); }
.site-nav a[aria-current="page"] { color: var(--ink); box-shadow: inset 0 -2px 0 var(--acad); border-radius: 0; }
.theme-toggle, .nav-toggle { display: inline-grid; place-items: center; width: 38px; height: 38px; border: 1px solid var(--rule); border-radius: 50%; background: transparent; color: var(--ink); cursor: pointer; }
.theme-toggle svg, .nav-toggle svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; }
.theme-toggle .i-moon { display: none; }
:root[data-theme="dark"] .theme-toggle .i-sun { display: none; }
:root[data-theme="dark"] .theme-toggle .i-moon { display: block; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle .i-sun { display: none; }
  :root:not([data-theme="light"]) .theme-toggle .i-moon { display: block; }
}
.nav-toggle { display: none; }

@media (max-width: 900px) {
  .nav-toggle { display: inline-grid; }
  .site-nav { position: absolute; left: 0; right: 0; top: 100%; background: var(--bg); border-bottom: 1px solid var(--rule); padding: 8px var(--gutter) 16px; display: none; flex-direction: column; align-items: stretch; }
  .site-nav.is-open { display: flex; }
  .site-nav ul { flex-direction: column; }
  .site-nav a { padding: 10px 4px; font-size: 1.05rem; }
  .site-nav a[aria-current="page"] { box-shadow: inset 3px 0 0 var(--acad); padding-left: 12px; }
  .theme-toggle { align-self: flex-start; margin-top: 8px; }
}

/* ---------- buttons, chips, tags ---------- */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 9px 16px; border: 1px solid var(--ink); border-radius: var(--r-sm); font-family: var(--font-display); font-size: .95rem; font-weight: 550; text-decoration: none; color: var(--ink); background: transparent; }
.btn:hover { color: var(--ink); background: var(--rule-soft); }
.btn--solid { background: var(--ink); color: var(--bg); }
.btn--solid:hover { background: var(--acad); border-color: var(--acad); color: #fff; }

.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chips li { font-family: var(--font-display); font-size: .92rem; padding: 4px 12px; border: 1px solid var(--rule); border-radius: 999px; background: var(--surface); }
.chips--small li { font-size: .85rem; padding: 2px 10px; }

.tag { font-family: var(--font-display); font-size: .78rem; font-weight: 550; padding: 1px 8px; border-radius: 999px; border: 1px solid var(--rule); color: var(--ink-2); }
.tag--status { border-color: transparent; background: var(--rule-soft); }
.tag--under-review, .tag--upcoming { background: color-mix(in srgb, var(--signal) 18%, transparent); color: var(--ink); }
.tag--presented, .tag--accepted { background: var(--acad-soft); color: var(--acad); }

/* ---------- section heads: a trace that runs out from a via ---------- */
.bus { display: flex; align-items: center; gap: 14px; font-size: clamp(1.45rem, 2.4vw, 1.85rem); margin: 0 0 22px; }
.bus::before { content: ""; width: 11px; height: 11px; flex: none; border-radius: 50%; border: 2.5px solid var(--acad); background: var(--bg); }
.bus::after { content: ""; flex: 1; height: 1px; background: linear-gradient(90deg, var(--rule), transparent); }

/* ---------- hero ---------- */
.hero {
  padding: clamp(36px, 7vw, 84px) 0 clamp(40px, 6vw, 72px);
  background-image: radial-gradient(var(--dot) 1.2px, transparent 1.4px);
  background-size: 22px 22px;
  border-bottom: 1px solid var(--rule-soft);
}
.hero__grid { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.2fr); gap: clamp(28px, 5vw, 64px); align-items: center; }
.hero__photo { width: 84px; height: 84px; border-radius: 50%; object-fit: cover; border: 3px solid var(--surface); box-shadow: 0 0 0 1.5px var(--ind); margin-bottom: 22px; }
.hero__name {
  font-size: clamp(3rem, 7.4vw, 5.6rem);
  font-weight: 760;
  font-stretch: 76%;
  letter-spacing: -.025em;
  line-height: .92;
  margin-bottom: 18px;
}
.hero__prefix { display: block; font-size: .3em; font-weight: 500; font-stretch: 100%; letter-spacing: 0; color: var(--ink-3); margin-bottom: .35em; }
.hero__headline { font-family: var(--font-display); font-size: 1.3rem; font-weight: 500; line-height: 1.3; margin-bottom: 12px; }
.hero__roles { margin-bottom: 18px; font-family: var(--font-display); color: var(--ink-2); }
.hero__roles li { padding-left: 16px; position: relative; }
.hero__roles li::before { content: ""; position: absolute; left: 0; top: .62em; width: 7px; height: 7px; border-radius: 50%; background: var(--acad); }
.hero__roles li:nth-child(2)::before { background: var(--ind); }
.about { font-size: clamp(1.12rem, 1.8vw, 1.3rem); line-height: 1.65; max-width: 62ch; margin-bottom: 34px; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 10px; margin: 22px 0 18px; }
.icon-links { display: flex; flex-wrap: wrap; gap: 6px; }
.icon-links a { display: inline-grid; place-items: center; width: 38px; height: 38px; border-radius: 50%; border: 1px solid var(--rule); color: var(--ink-2); background: var(--surface); }
.icon-links a:hover { color: var(--ind); border-color: var(--ind); }

/* ---------- network map ---------- */
.netmap { margin: 0; position: relative; }
.netmap__caption { font-family: var(--font-display); font-size: .88rem; color: var(--ink-3); margin-bottom: 6px; }
.netmap svg { width: 100%; height: auto; overflow: visible; display: block; }
.netmap .trace { fill: none; stroke-width: 2.2; stroke-linejoin: round; stroke-linecap: round; transition: stroke-width .2s, opacity .2s; }
.netmap .trace--academic { stroke: var(--acad); }
.netmap .trace--industry { stroke: var(--ind); }
.netmap .pad { stroke-width: 2.4; fill: var(--bg); }
.netmap .pad--academic { stroke: var(--acad); }
.netmap .pad--industry { stroke: var(--ind); }
.netmap .lbl { font-family: var(--font-display); fill: var(--ink); font-size: 16px; font-weight: 600; }
.netmap .lbl-sub { font-family: var(--font-display); fill: var(--ink-3); font-size: 13px; opacity: 0; transition: opacity .2s; }
.netmap .chip { fill: var(--chip); }
.netmap .chip-pin { fill: var(--ink-3); }
.netmap .chip-text { fill: var(--chip-ink); font-family: var(--font-display); font-weight: 760; font-size: 30px; font-stretch: 80%; letter-spacing: .02em; }
.netmap .chip-sub { fill: color-mix(in srgb, var(--chip-ink) 65%, transparent); font-family: var(--font-display); font-size: 9.5px; letter-spacing: .04em; }
.netmap .pulse { fill: var(--signal); }
.netmap .node { cursor: default; }
.netmap .node:hover .lbl-sub, .netmap .node:focus .lbl-sub, .netmap .node.is-on .lbl-sub { opacity: 1; }
.netmap.has-focus .trace { opacity: .25; }
.netmap.has-focus .trace.is-on { opacity: 1; stroke-width: 3.2; }
.netmap__list { display: none; }
.netmap__legend { display: flex; gap: 18px; font-family: var(--font-display); font-size: .88rem; color: var(--ink-2); margin-top: 10px; }
.key { display: inline-flex; align-items: center; gap: 8px; }
.key::before { content: ""; width: 22px; height: 3px; border-radius: 2px; }
.key--academic::before { background: var(--acad); }
.key--industry::before { background: var(--ind); }

/* fallback list (no JS / narrow screens) */
.netmap.is-list svg { display: none; }
.netmap.is-list .netmap__list, .netmap:not(.is-drawn) .netmap__list { display: grid; grid-template-columns: 1fr 1fr; gap: 8px 18px; }
.netmap__list li { border-left: 3px solid var(--acad); padding: 2px 0 2px 10px; font-family: var(--font-display); }
.netmap__list li[data-track="industry"] { border-color: var(--ind); }
.netmap__org { display: block; font-weight: 600; font-size: .95rem; line-height: 1.3; }
.netmap__detail { display: block; font-size: .82rem; color: var(--ink-3); line-height: 1.3; }
.netmap.is-list .netmap__caption { display: none; }

@media (max-width: 900px) {
  .hero__grid { grid-template-columns: 1fr; }
}
@media (max-width: 460px) {
  .netmap.is-list .netmap__list, .netmap:not(.is-drawn) .netmap__list { grid-template-columns: 1fr; }
}

/* ---------- bands (home sections) ---------- */
.band { padding: clamp(44px, 6vw, 72px) 0 0; }
.band--contact { padding-bottom: clamp(48px, 7vw, 88px); }
.section-lede { max-width: 62ch; color: var(--ink-2); margin: -8px 0 26px; }
.more { margin-top: 18px; font-family: var(--font-display); font-weight: 550; }
.more a { text-decoration: none; border-bottom: 1.5px solid var(--acad); padding-bottom: 1px; }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(28px, 5vw, 56px); }
@media (max-width: 820px) { .split { grid-template-columns: 1fr; } }

/* focus areas */
.focus { display: grid; grid-template-columns: 1fr 1.2fr; gap: clamp(24px, 5vw, 56px); }
.focus__label { font-family: var(--font-display); font-weight: 600; font-size: .95rem; color: var(--ink-3); margin: 0 0 10px; }
.focus__main li { font-family: var(--font-display); font-size: clamp(1.2rem, 2vw, 1.45rem); font-weight: 560; line-height: 1.25; padding: 10px 0; border-bottom: 1px solid var(--rule-soft); }
.focus__main li:first-child { border-top: 1px solid var(--rule-soft); }
@media (max-width: 820px) { .focus { grid-template-columns: 1fr; } }

/* two tracks */
.tracks { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.track { background: var(--surface); border: 1px solid var(--rule-soft); border-radius: var(--r-md); padding: 24px 24px 20px; position: relative; overflow: hidden; }
.track::before { content: ""; position: absolute; inset: 0 0 auto 0; height: 4px; background: var(--acad); }
.track--industry::before { background: var(--ind); }
.track__head h3 { font-size: 1.6rem; font-stretch: 85%; }
.track--academic .track__head h3 { color: var(--acad); }
.track--industry .track__head h3 { color: var(--ind); }
.track__head p { font-family: var(--font-display); color: var(--ink-3); font-size: .92rem; margin: 4px 0 14px; }
.track__list li { display: grid; grid-template-columns: 1fr auto; column-gap: 12px; padding: 10px 0; border-top: 1px solid var(--rule-soft); }
.track__list--tight li { padding: 7px 0; }
.track__role { font-family: var(--font-display); font-weight: 600; line-height: 1.3; }
.track__org { grid-column: 1; color: var(--ink-2); font-size: .93rem; line-height: 1.45; }
.track__when { grid-column: 2; grid-row: 1 / span 2; font-family: var(--font-display); font-size: .82rem; color: var(--ink-3); white-space: nowrap; font-variant-numeric: tabular-nums; }
.track__sub { font-family: var(--font-display); font-weight: 600; font-size: .9rem; color: var(--ink-3); margin: 18px 0 6px; }
.cert-strip { display: flex; flex-wrap: wrap; gap: 6px; }
.cert-strip li { font-family: var(--font-display); font-weight: 650; font-size: .82rem; padding: 3px 9px; border-radius: var(--r-sm); background: var(--ind-soft); color: var(--ind); cursor: help; }
@media (max-width: 820px) { .tracks { grid-template-columns: 1fr; } }
@media (max-width: 480px) { .track__list li { grid-template-columns: 1fr; } .track__when { grid-column: 1; grid-row: auto; } }

/* projects & repos */
.projects { display: grid; gap: 14px; }
.projects--wide { grid-template-columns: 1fr 1fr; }
.project { padding: 18px 20px; background: var(--surface); border: 1px solid var(--rule-soft); border-left: 3px solid var(--acad); border-radius: var(--r-sm); }
.project__title { font-weight: 560; line-height: 1.45; }
.project__meta { font-family: var(--font-display); font-size: .9rem; color: var(--ink-3); margin: 0; }
@media (max-width: 820px) { .projects--wide { grid-template-columns: 1fr; } }

.repos { display: grid; gap: 4px; }
.repos--grid { grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 14px; }
.repo { padding: 12px 0; border-bottom: 1px solid var(--rule-soft); }
.repos--grid .repo { padding: 16px 18px; border: 1px solid var(--rule-soft); border-radius: var(--r-sm); background: var(--surface); }
.repo a { display: inline-flex; align-items: center; gap: 8px; font-family: var(--font-display); font-weight: 650; text-decoration: none; }
.repo a:hover { color: var(--ind); }
.repo p { margin: 4px 0 0; color: var(--ink-2); font-size: .95rem; line-height: 1.55; }
.repo .repo__lang { font-family: var(--font-display); font-size: .82rem; color: var(--ind); margin-top: 8px; }

/* ledger (awards) */
.ledger li { display: grid; grid-template-columns: 64px 1fr minmax(160px, 30%); gap: 16px; align-items: baseline; padding: 12px 0; border-top: 1px solid var(--rule-soft); }
.ledger li:last-child { border-bottom: 1px solid var(--rule-soft); }
.ledger__year { font-family: var(--font-display); font-weight: 700; font-size: 1.05rem; color: var(--acad); font-variant-numeric: tabular-nums; }
.ledger__what { font-weight: 560; line-height: 1.45; }
.ledger__what em { display: block; font-weight: 400; color: var(--ink-2); font-size: .93rem; }
.ledger__by { font-family: var(--font-display); color: var(--ink-3); font-size: .92rem; }
@media (max-width: 640px) {
  .ledger li { grid-template-columns: 52px 1fr; }
  .ledger__by { grid-column: 2; margin-top: -10px; }
}

/* contact */
.open-to { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin-bottom: 36px; }
.open-to li { border-top: 2px solid var(--ink); padding-top: 12px; }
.open-to li:nth-child(odd) { border-color: var(--acad); }
.open-to li:nth-child(even) { border-color: var(--ind); }
.open-to__title { font-family: var(--font-display); font-weight: 650; font-size: 1.1rem; margin-bottom: 4px; }
.open-to p:last-child { color: var(--ink-2); font-size: .95rem; line-height: 1.55; }
@media (max-width: 900px) { .open-to { grid-template-columns: 1fr 1fr; } }
@media (max-width: 480px) { .open-to { grid-template-columns: 1fr; } }
.philosophy { margin: 0 0 28px; padding: 0; max-width: 46ch; }
.philosophy p { font-size: clamp(1.35rem, 2.6vw, 1.75rem); font-style: italic; line-height: 1.4; margin-bottom: 8px; }
.philosophy footer { font-family: var(--font-display); color: var(--ink-3); font-size: .95rem; }

/* ---------- inner page head ---------- */
.page-head { padding: clamp(36px, 6vw, 64px) 0 0; background-image: radial-gradient(var(--dot) 1.2px, transparent 1.4px); background-size: 22px 22px; }
.page-head h1 { font-size: clamp(2.5rem, 6vw, 4.2rem); font-weight: 740; font-stretch: 78%; letter-spacing: -.02em; line-height: .98; }
.page-head .lede { max-width: 62ch; color: var(--ink-2); font-size: 1.12rem; margin: 16px 0 0; }
.page-head__trace { display: block; width: 100%; height: 24px; margin-top: clamp(24px, 4vw, 40px); }
.page-head__trace path { fill: none; stroke: var(--rule); stroke-width: 1.5; vector-effect: non-scaling-stroke; }
.page-head__trace circle { fill: var(--bg); stroke: var(--acad); stroke-width: 2.5; vector-effect: non-scaling-stroke; }
.page-body { padding-top: clamp(24px, 4vw, 40px); padding-bottom: clamp(56px, 8vw, 96px); }
.block { margin-top: clamp(40px, 6vw, 64px); }
.page-body > .block:first-child, .page-body > .summary:first-child { margin-top: 0; }
.summary { font-family: var(--font-display); font-size: 1.15rem; font-weight: 500; color: var(--ink-2); max-width: 60ch; }

/* ---------- publications ---------- */
.filters { display: flex; flex-wrap: wrap; gap: 12px 18px; align-items: center; margin-bottom: 18px; }
.seg { display: inline-flex; flex-wrap: wrap; gap: 4px; padding: 4px; border: 1px solid var(--rule); border-radius: 8px; background: var(--surface); }
.seg__btn { font-family: var(--font-display); font-size: .9rem; font-weight: 550; padding: 6px 12px; border: 0; border-radius: 5px; background: transparent; color: var(--ink-2); cursor: pointer; }
.seg__btn span { color: var(--ink-3); font-weight: 400; margin-left: 2px; font-variant-numeric: tabular-nums; }
.seg__btn:hover { background: var(--rule-soft); color: var(--ink); }
.seg__btn[aria-pressed="true"] { background: var(--ink); color: var(--bg); }
.seg__btn[aria-pressed="true"] span { color: inherit; opacity: .7; }
.seg__btn--academic[aria-pressed="true"] { background: var(--acad); color: #fff; }
.seg__btn--industry[aria-pressed="true"] { background: var(--ind); color: #fff; }
.check { font-family: var(--font-display); font-size: .92rem; color: var(--ink-2); display: inline-flex; gap: 8px; align-items: center; cursor: pointer; }
.check input { accent-color: var(--acad); width: 16px; height: 16px; }
.search { margin-left: auto; flex: 1 1 220px; max-width: 320px; }
.search input { width: 100%; font: inherit; font-family: var(--font-display); font-size: .95rem; padding: 8px 12px; border: 1px solid var(--rule); border-radius: 6px; background: var(--surface); color: var(--ink); }
.search input:focus { outline: 2px solid var(--acad); outline-offset: 0; border-color: transparent; }
@media (max-width: 640px) { .search { margin-left: 0; max-width: none; } }

.pubs { counter-reset: none; }
.pub { display: grid; grid-template-columns: 52px 1fr; gap: 16px; padding: 18px 0; border-top: 1px solid var(--rule-soft); }
.pub:last-child { border-bottom: 1px solid var(--rule-soft); }
.pub[hidden] { display: none; }
.pub__code { align-self: start; margin-top: 3px; display: inline-grid; place-items: center; height: 30px; min-width: 44px; padding: 0 6px; border-radius: 15px; border: 2px solid var(--acad); color: var(--acad); font-family: var(--font-display); font-weight: 700; font-size: .85rem; font-variant-numeric: tabular-nums; }
.pub[data-status="under-review"] .pub__code, .pub[data-status="upcoming"] .pub__code { border-style: dashed; border-color: var(--ink-3); color: var(--ink-3); }
.pub__title { font-weight: 600; font-size: 1.05rem; line-height: 1.45; margin-bottom: 4px; }
.pub__title a { text-decoration: none; }
.pub__title a:hover { text-decoration: underline; }
.pub__authors { color: var(--ink-2); font-size: .95rem; margin-bottom: 2px; }
.pub__authors .me { color: var(--ink); font-weight: 650; }
.pub__venue { font-style: italic; color: var(--ink-2); font-size: .95rem; margin-bottom: 8px; }
.pub__meta { display: flex; flex-wrap: wrap; gap: 8px 10px; align-items: center; margin: 0; }
.pub__note { font-family: var(--font-display); font-size: .82rem; color: var(--ink-3); }
.pub__link { display: inline-flex; align-items: center; gap: 4px; font-family: var(--font-display); font-size: .85rem; font-weight: 550; text-decoration: none; color: var(--acad); }
.pub__link:hover { text-decoration: underline; }
.pub__link .icon { width: 14px; height: 14px; }
.empty { font-family: var(--font-display); color: var(--ink-3); padding: 24px 0; }
@media (max-width: 520px) { .pub { grid-template-columns: 1fr; gap: 6px; } .pub__code { justify-self: start; } }

/* generic rows */
.rows li { padding: 12px 0; border-top: 1px solid var(--rule-soft); }
.rows li:last-child { border-bottom: 1px solid var(--rule-soft); }
.rows__title { font-weight: 560; line-height: 1.45; margin-bottom: 2px; }
.rows__title a { text-decoration: none; border-bottom: 1px solid var(--acad); }
.rows__meta { font-family: var(--font-display); font-size: .9rem; color: var(--ink-3); margin: 0; line-height: 1.45; }
.rows--dated li { display: grid; grid-template-columns: 150px 1fr; gap: 18px; }
.rows__date { font-family: var(--font-display); font-size: .88rem; color: var(--ink-3); padding-top: 3px; font-variant-numeric: tabular-nums; }
.rows--dated li.is-highlight .rows__title::before { content: ""; display: inline-block; width: 8px; height: 8px; border-radius: 50%; background: var(--signal); margin-right: 8px; vertical-align: .12em; }
@media (max-width: 600px) { .rows--dated li { grid-template-columns: 1fr; gap: 0; } }

/* people */
.people { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 12px; margin-bottom: 26px; }
.person { display: grid; grid-template-columns: 46px 1fr; gap: 14px; align-items: start; padding: 14px; border: 1px solid var(--rule-soft); border-radius: var(--r-sm); background: var(--surface); }
.person__mono { display: grid; place-items: center; width: 46px; height: 46px; border-radius: 50%; background: var(--acad-soft); color: var(--acad); font-family: var(--font-display); font-weight: 700; }
.person__name { font-family: var(--font-display); font-weight: 650; margin: 0; line-height: 1.3; }
.person__name a { text-decoration: none; }
.person__rel { font-family: var(--font-display); font-size: .85rem; color: var(--ind); font-weight: 600; margin: 2px 0 0; }
.person__role { font-size: .9rem; color: var(--ink-2); margin: 2px 0 0; line-height: 1.45; }

/* ---------- experience timeline ---------- */
.seg--tracks { margin-bottom: 28px; }
.timeline { position: relative; padding-left: 34px; }
.timeline::before { content: ""; position: absolute; left: 9px; top: 8px; bottom: 8px; width: 2px; background: var(--rule); }
.tl { position: relative; padding: 0 0 30px; max-width: 72ch; }
.tl[hidden] { display: none; }
.tl__pad { position: absolute; left: -32px; top: 5px; width: 16px; height: 16px; border-radius: 50%; border: 3px solid var(--acad); background: var(--bg); }
.tl--industry .tl__pad { border-color: var(--ind); }
.tl--current .tl__pad { background: var(--acad); }
.tl--current.tl--industry .tl__pad { background: var(--ind); }
.tl__when { font-family: var(--font-display); font-size: .88rem; color: var(--ink-3); margin-bottom: 2px; display: flex; align-items: center; gap: 10px; }
.tl__now { font-size: .75rem; font-weight: 650; color: var(--ink); background: color-mix(in srgb, var(--signal) 22%, transparent); padding: 0 8px; border-radius: 999px; }
.tl__role { font-size: 1.3rem; }
.tl--academic .tl__role { color: var(--ink); }
.tl__org { color: var(--ink-2); margin: 2px 0 6px; }
.tl__org a { text-decoration: none; border-bottom: 1px solid currentColor; }
.tl__text { color: var(--ink-2); }
.tl__points { margin-top: 4px; }
.tl__points li { position: relative; padding-left: 18px; color: var(--ink-2); font-size: .97rem; line-height: 1.55; margin-bottom: 4px; }
.tl__points li::before { content: ""; position: absolute; left: 2px; top: .7em; width: 8px; height: 2px; background: var(--rule); }

.skills { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 22px 32px; }

/* ---------- teaching ---------- */
.teach .bus { font-size: clamp(1.25rem, 2.2vw, 1.55rem); }
.teach__role { font-family: var(--font-display); font-weight: 600; color: var(--ind); margin: -12px 0 14px 25px; }
.teach__term { display: grid; grid-template-columns: 210px 1fr; gap: 18px; padding: 14px 0; border-top: 1px solid var(--rule-soft); }
.teach__when { font-family: var(--font-display); font-size: .92rem; font-weight: 600; color: var(--ink-3); margin: 0; }
.teach__courses { display: grid; gap: 14px; }
.course__name { font-weight: 600; margin-bottom: 0; }
.course__meta { color: var(--ink-2); font-size: .95rem; margin: 0; display: flex; flex-wrap: wrap; gap: 4px 12px; }
.course__n { font-family: var(--font-display); font-size: .85rem; color: var(--acad); font-weight: 600; }
.course__extra { font-size: .92rem; color: var(--ink-3); margin: 2px 0 0; display: flex; flex-wrap: wrap; gap: 4px 14px; align-items: center; }
.course__repo { display: inline-flex; align-items: center; gap: 5px; font-family: var(--font-display); font-weight: 550; text-decoration: none; color: var(--ind); }
.course__repo .icon { width: 15px; height: 15px; }
@media (max-width: 680px) { .teach__term { grid-template-columns: 1fr; gap: 8px; } }

/* ---------- mentoring ---------- */
.mentor-intro { display: grid; gap: 14px; max-width: 70ch; }
.motto { margin: 0; font-size: clamp(1.25rem, 2.4vw, 1.6rem); font-style: italic; line-height: 1.45; border-left: 3px solid var(--ind); padding-left: 18px; }
.program__meta { font-family: var(--font-display); color: var(--ink-3); margin: -12px 0 16px 25px; }
.groups { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 12px; }
.group { padding: 14px 16px; border: 1px solid var(--rule-soft); border-radius: var(--r-sm); background: var(--surface); }
.group__title { font-family: var(--font-display); font-weight: 650; line-height: 1.3; margin-bottom: 4px; }
.group__inst { font-family: var(--font-display); font-size: .85rem; color: var(--ind); margin-bottom: 6px; }
.group__members { font-size: .92rem; color: var(--ink-2); line-height: 1.55; margin: 0; }
.groups--dense { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }

/* ---------- recognitions ---------- */
.certs { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 14px; }
.cert { position: relative; display: grid; gap: 2px; padding: 16px 16px 14px; border-radius: 6px; background: var(--chip); color: var(--chip-ink); }
.cert::before, .cert::after { content: ""; position: absolute; top: 14px; bottom: 14px; width: 4px; background: repeating-linear-gradient(to bottom, var(--ink-3) 0 3px, transparent 3px 8px); }
.cert::before { left: -5px; }
.cert::after { right: -5px; }
.cert__name { font-family: var(--font-display); font-weight: 760; font-size: 1.45rem; font-stretch: 80%; line-height: 1.1; }
.cert__full { font-family: var(--font-display); font-size: .88rem; opacity: .82; line-height: 1.35; }
.cert__by { font-family: var(--font-display); font-size: .8rem; font-weight: 600; color: var(--ind-soft); margin-top: 6px; }
:root[data-theme="dark"] .cert__by { color: var(--ind); }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .cert__by { color: var(--ind); } }

/* ---------- talks ---------- */
.talks { display: grid; gap: 0; max-width: 820px; }
.talk { display: grid; grid-template-columns: auto 1fr; gap: 18px; padding: 18px 0; border-top: 1px solid var(--rule-soft); }
.talk:last-child { border-bottom: 1px solid var(--rule-soft); }
.talk:not(:has(img)) { grid-template-columns: 1fr; }
.talk__img { width: 180px; height: 120px; object-fit: cover; border-radius: var(--r-sm); }
.talk__where { font-family: var(--font-display); font-size: 1.35rem; font-weight: 650; line-height: 1.2; margin-bottom: 4px; }
.talk__event { color: var(--ink-2); margin-bottom: 2px; }
.talk__meta { font-family: var(--font-display); font-size: .9rem; color: var(--ink-3); margin: 0; }
.note { margin-top: 40px; padding: 22px 24px; border: 1px solid var(--rule); border-left: 3px solid var(--ind); border-radius: var(--r-sm); background: var(--surface); max-width: 820px; }
.note p:last-child { margin: 12px 0 0; }
@media (max-width: 560px) { .talk { grid-template-columns: 1fr; } .talk__img { width: 100%; height: 180px; } }

/* ---------- footer ---------- */
.site-foot { border-top: 1px solid var(--rule); background: var(--surface); padding: 40px 0 20px; font-size: .95rem; }
.site-foot__grid { display: grid; grid-template-columns: 1fr auto; gap: 24px; align-items: start; }
.site-foot__name { font-family: var(--font-display); font-weight: 700; font-size: 1.2rem; margin: 0; }
.site-foot .link-row { display: grid; grid-template-columns: repeat(2, auto); gap: 6px 22px; }
.link-row a { display: inline-flex; align-items: center; gap: 8px; text-decoration: none; font-family: var(--font-display); color: var(--ink-2); }
.link-row a:hover { color: var(--ind); }
.site-foot__base { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px; margin-top: 26px; padding-top: 16px; border-top: 1px solid var(--rule-soft); font-family: var(--font-display); font-size: .85rem; }
@media (max-width: 680px) { .site-foot__grid { grid-template-columns: 1fr; } }

/* ---------- motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}

@media print {
  .site-head, .site-foot, .filters, .seg, .theme-toggle, .netmap, .hero__actions, .icon-links { display: none !important; }
  body { background: #fff; color: #000; }
  .hero, .page-head { background: none; }
}

/* ==========================================================================
   v2 additions: avatars, Venn, education steps, mentoring motion
   ========================================================================== */
:root {
  --v0: #2F64D8;   /* venn: networks */
  --v1: #0E9C86;   /* venn: software */
  --v2: #D98A00;   /* venn: investigation */
}
:root[data-theme="dark"] { --v0: #7FA2FF; --v1: #3FD0B5; --v2: #F5B83D; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) { --v0: #7FA2FF; --v1: #3FD0B5; --v2: #F5B83D; } }

.sub-head { font-size: 1.15rem; font-weight: 600; color: var(--ink-3); margin: 40px 0 14px; }
.btn--small { padding: 6px 12px; font-size: .85rem; }

/* ---------- avatar ---------- */
.avatar { position: relative; flex: none; display: inline-grid; place-items: center; width: 40px; height: 40px; border-radius: 50%; overflow: hidden; background: var(--acad-soft); color: var(--acad); font-family: var(--font-display); font-weight: 700; font-size: .85rem; border: 2px solid var(--surface); }
.avatar img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.avatar--lg { width: 72px; height: 72px; font-size: 1.2rem; }
.person { grid-template-columns: auto 1fr; }
.person .avatar { width: 46px; height: 46px; border: 0; }
.person--lg { grid-template-columns: auto 1fr; padding: 18px; }
.person--lg .avatar { width: 72px; height: 72px; box-shadow: 0 0 0 2px var(--surface), 0 0 0 3.5px var(--ind); }
.people--lg { grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); }

/* ---------- focus row ---------- */
.focus--solo { display: block; }
.focus__main--row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0 20px; }
.focus__main--row li { border-top: 2px solid var(--acad); border-bottom: 0; padding-top: 12px; }
.focus__main--row li:first-child { border-top: 2px solid var(--acad); }
@media (max-width: 820px) { .focus__main--row { grid-template-columns: 1fr 1fr; } }
@media (max-width: 460px) { .focus__main--row { grid-template-columns: 1fr; } }

/* ---------- Venn ---------- */
.venn { margin: 0; display: grid; grid-template-columns: minmax(0, 1.9fr) minmax(0, 1fr); gap: 32px; align-items: center; }
.venn__stage svg { width: 100%; height: auto; display: block; overflow: visible; }
.venn__c { fill-opacity: .13; stroke-width: 2; transition: fill-opacity .25s, stroke-width .25s; }
.venn__c--0 { fill: var(--v0); stroke: var(--v0); }
.venn__c--1 { fill: var(--v1); stroke: var(--v1); }
.venn__c--2 { fill: var(--v2); stroke: var(--v2); }
.venn__label { font-family: var(--font-display); font-weight: 650; font-size: 15px; }
.venn__label--0 { fill: var(--v0); } .venn__label--1 { fill: var(--v1); } .venn__label--2 { fill: var(--v2); }
.venn__t { font-family: var(--font-display); font-size: 14.5px; font-weight: 520; fill: var(--ink); transition: opacity .25s; cursor: default; }
.venn__t--core { font-size: 18px; font-weight: 760; }
.venn__core-ring { fill: var(--surface); stroke: var(--ink); stroke-width: 1.5; }
.venn[data-focus] .venn__c { fill-opacity: .05; }
.venn[data-focus="0"] .venn__c--0, .venn[data-focus="1"] .venn__c--1, .venn[data-focus="2"] .venn__c--2 { fill-opacity: .28; stroke-width: 3; }
.venn[data-focus] .venn__t { opacity: .22; }
.venn[data-focus] .venn__t.is-on { opacity: 1; }
.venn.has-area .venn__c { fill-opacity: .05; }
.venn.has-area .venn__c.is-on { fill-opacity: .3; stroke-width: 3; }
.venn.has-area .venn__t { opacity: .3; }
.venn.has-area .venn__t.is-on { opacity: 1; font-weight: 700; }
.venn__sets { display: grid; gap: 12px; }
.venn__set { padding: 12px 14px 12px 16px; border-radius: var(--r-sm); background: var(--surface); border: 1px solid var(--rule-soft); border-left: 4px solid; cursor: default; transition: transform .2s, box-shadow .2s; }
.venn__set--0 { border-left-color: var(--v0); } .venn__set--1 { border-left-color: var(--v1); } .venn__set--2 { border-left-color: var(--v2); }
.venn__set:hover, .venn__set:focus-visible, .venn__set.is-on { transform: translateX(4px); box-shadow: 0 6px 18px -12px rgba(0,0,0,.5); }
.venn__set-name { display: block; font-family: var(--font-display); font-weight: 650; }
.venn__set--0 .venn__set-name { color: var(--v0); } .venn__set--1 .venn__set-name { color: var(--v1); } .venn__set--2 .venn__set-name { color: var(--v2); }
.venn__set-text { display: block; font-size: .92rem; color: var(--ink-2); line-height: 1.5; margin-top: 2px; }
.venn__hint { font-family: var(--font-display); font-size: .85rem; color: var(--ink-3); margin: 12px 0 0; }
.venn__areas { grid-column: 1 / -1; display: flex; flex-wrap: wrap; gap: 8px; }
.venn.is-drawn:not(.is-list) .venn__areas { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
.venn__areas li { display: inline-flex; align-items: center; gap: 8px; font-family: var(--font-display); font-size: .92rem; padding: 4px 12px 4px 8px; border: 1px solid var(--rule); border-radius: 999px; background: var(--surface); }
.venn__dots { display: inline-flex; }
.venn__dot { width: 10px; height: 10px; border-radius: 50%; border: 1.5px solid var(--surface); margin-left: -3px; }
.venn__dot:first-child { margin-left: 0; }
.venn__dot--0 { background: var(--v0); } .venn__dot--1 { background: var(--v1); } .venn__dot--2 { background: var(--v2); }
.venn:not(.is-drawn) .venn__stage, .venn.is-list .venn__stage { display: none; }
.venn:not(.is-drawn), .venn.is-list { grid-template-columns: 1fr; }
.venn:not(.is-drawn) .venn__hint, .venn.is-list .venn__hint { display: none; }
@media (max-width: 900px) { .venn { grid-template-columns: 1fr; } }

/* ---------- education steps ---------- */
.edu { position: relative; display: grid; grid-template-columns: repeat(var(--steps, 4), minmax(0, 1fr)); gap: 0 22px; padding-top: 30px; }
.edu::before, .edu::after { content: ""; position: absolute; left: 8px; right: 8px; top: 38px; height: 2px; background: var(--rule); }
.edu::after { background: var(--acad); transform-origin: left; transform: scaleX(1); }
.edu.is-armed::after { transform: scaleX(0); }
.edu.is-in::after { transform: scaleX(1); transition: transform 1.3s cubic-bezier(.3,.7,.2,1); }
.edu__step { position: relative; padding-top: 30px; }
.edu__pad { position: absolute; top: 0; left: 0; width: 18px; height: 18px; border-radius: 50%; background: var(--bg); border: 3px solid var(--acad); z-index: 1; }
.edu.is-armed .edu__pad { transform: scale(0); }
.edu.is-in .edu__pad { transform: scale(1); transition: transform .4s cubic-bezier(.3,1.6,.5,1) calc(var(--i) * .3s + .1s); }
.edu__step.is-current .edu__pad { background: var(--acad); }
.edu__step.is-current .edu__pad::after { content: ""; position: absolute; inset: -8px; border-radius: 50%; border: 2px solid var(--acad); opacity: 0; animation: edu-ping 2.4s ease-out 1.6s 3; }
@keyframes edu-ping { 0% { transform: scale(.6); opacity: .9; } 100% { transform: scale(1.6); opacity: 0; } }
.edu__year { font-family: var(--font-display); font-weight: 650; font-size: .95rem; color: var(--acad); font-variant-numeric: tabular-nums; margin-bottom: 4px; display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.edu__now { font-size: .75rem; font-weight: 650; color: var(--ink); background: color-mix(in srgb, var(--signal) 22%, transparent); padding: 0 8px; border-radius: 999px; }
.edu__degree { font-size: clamp(2rem, 3.6vw, 2.8rem); font-weight: 760; font-stretch: 80%; letter-spacing: -.02em; line-height: 1; }
.edu__field { font-family: var(--font-display); font-weight: 550; color: var(--ink-2); line-height: 1.35; margin: 8px 0 12px; }
.edu__school { font-weight: 600; line-height: 1.4; margin-bottom: 2px; }
.edu__note { font-size: .88rem; color: var(--ink-3); line-height: 1.45; }
.edu__focus { font-size: .92rem; color: var(--ink-2); line-height: 1.5; font-style: italic; }
.edu__sup { font-family: var(--font-display); font-size: .86rem; color: var(--ind); line-height: 1.45; border-top: 1px solid var(--rule-soft); padding-top: 8px; margin-top: 10px; }
@media (max-width: 820px) {
  .edu { grid-template-columns: 1fr; padding-top: 0; padding-left: 34px; gap: 26px; }
  .edu::before, .edu::after { left: 8px; right: auto; top: 6px; bottom: 6px; width: 2px; height: auto; }
  .edu::after { transform-origin: top; }
  .edu.is-armed::after { transform: scaleY(0); }
  .edu.is-in::after { transform: scaleY(1); }
  .edu__step { padding-top: 0; }
  .edu__pad { left: -34px; top: 2px; }
}

/* ---------- mentoring: stats ---------- */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 8px; }
.stats li { padding: 16px 18px; background: var(--surface); border: 1px solid var(--rule-soft); border-top: 3px solid var(--ind); border-radius: var(--r-sm); }
.stats__n { display: block; font-family: var(--font-display); font-weight: 760; font-stretch: 80%; font-size: clamp(2rem, 4vw, 2.8rem); line-height: 1; font-variant-numeric: tabular-nums; }
.stats__l { display: block; font-family: var(--font-display); font-size: .88rem; color: var(--ink-3); margin-top: 6px; line-height: 1.35; }
@media (max-width: 760px) { .stats { grid-template-columns: 1fr 1fr; } }
.mentor-intro { max-width: none; }
.motto { max-width: 70ch; }
.program__count { white-space: nowrap; margin-left: 10px; font-size: .8rem; font-weight: 600; color: var(--ind); background: var(--ind-soft); padding: 1px 9px; border-radius: 999px; }

/* ---------- mentoring card ---------- */
.mcard { height: 100%; display: flex; flex-direction: column; background: var(--surface); border: 1px solid var(--rule-soft); border-radius: var(--r-md); overflow: hidden; }
.mcard__photo { aspect-ratio: 16 / 9; background: var(--rule-soft); overflow: hidden; }
.mcard__photo img { width: 100%; height: 100%; object-fit: cover; }
.mcard__body { padding: 16px 18px 18px; }
.mcard__title { font-family: var(--font-display); font-weight: 650; font-size: 1.08rem; line-height: 1.3; margin-bottom: 4px; }
.mcard__inst { font-family: var(--font-display); font-size: .85rem; color: var(--ind); line-height: 1.4; margin-bottom: 10px; }
.mcard__people { display: grid; gap: 8px; margin-top: 10px; }
.mcard__people li { display: flex; align-items: center; gap: 10px; }
.mcard__name { font-size: .95rem; line-height: 1.3; }
.mcard__name small { display: block; font-family: var(--font-display); font-size: .78rem; color: var(--ink-3); }
.mcard--compact .mcard__people { grid-template-columns: 1fr 1fr; gap: 6px 10px; }
.mcard--compact .avatar { width: 28px; height: 28px; font-size: .7rem; border-width: 0; }
.mcard--compact .mcard__name { font-size: .85rem; }

/* ---------- carousel ---------- */
.carousel { position: relative; }
.carousel__track { display: flex; gap: 18px; overflow-x: auto; scroll-snap-type: x mandatory; scroll-behavior: smooth; padding: 4px 2px 18px; scrollbar-width: none; overscroll-behavior-x: contain; }
.carousel__track::-webkit-scrollbar { display: none; }
.carousel__slide { flex: 0 0 calc((100% - 36px) / 3); scroll-snap-align: start; }
.carousel__slide .mcard { transition: transform .35s, box-shadow .35s; }
.carousel__slide.is-active .mcard { box-shadow: 0 14px 30px -18px rgba(0,0,0,.45); }
@media (max-width: 900px) { .carousel__slide { flex-basis: calc((100% - 18px) / 2); } }
@media (max-width: 560px) { .carousel__slide { flex-basis: 84%; } }
.carousel__controls { display: flex; align-items: center; gap: 14px; margin-top: 4px; }
.carousel__dots { display: flex; gap: 6px; flex: 1; }
.carousel__dots button { width: 8px; height: 8px; padding: 0; border: 0; border-radius: 999px; background: var(--rule); cursor: pointer; transition: width .3s, background .3s; }
.carousel__dots button[aria-current="true"] { width: 26px; background: var(--ind); }
.carousel__progress { position: absolute; left: 0; bottom: 52px; height: 2px; background: var(--ind); width: 0; opacity: .6; }
.round-btn { display: inline-grid; place-items: center; width: 40px; height: 40px; border-radius: 50%; border: 1px solid var(--ink); background: transparent; color: var(--ink); cursor: pointer; }
.round-btn svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.round-btn:hover { background: var(--rule-soft); }
.round-btn--solid { background: var(--ink); color: var(--bg); }
.round-btn--solid:hover { background: var(--ind); border-color: var(--ind); color: #fff; }
.round-btn:disabled { opacity: .35; cursor: default; }

/* ---------- flip cards ---------- */
.flips { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 18px; }
.flip { perspective: 1200px; cursor: pointer; height: 100%; border-radius: var(--r-md); outline-offset: 4px; }
.flip__inner { display: grid; height: 100%; transition: transform .7s cubic-bezier(.3,.7,.2,1); transform-style: preserve-3d; }
.flip.is-flipped .flip__inner { transform: rotateY(180deg); }
.flip__face { grid-area: 1 / 1; backface-visibility: hidden; -webkit-backface-visibility: hidden; border-radius: var(--r-md); overflow: hidden; display: flex; flex-direction: column; }
.flip__front { background: var(--surface); border: 1px solid var(--rule-soft); }
.flip__back { transform: rotateY(180deg); background: var(--chip); color: var(--chip-ink); padding: 20px; }
.flip__photo { aspect-ratio: 16 / 9; overflow: hidden; background: var(--rule-soft); }
.flip__photo img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s; }
.flip:hover .flip__photo img { transform: scale(1.04); }
.flip__title { font-family: var(--font-display); font-weight: 650; font-size: 1.08rem; line-height: 1.3; padding: 16px 18px 0; margin-bottom: 6px; }
.flip__front .mcard__inst { padding: 0 18px; }
.flip__foot { margin-top: auto; display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 12px 18px 16px; }
.stack { display: inline-flex; }
.stack .avatar { width: 32px; height: 32px; font-size: .72rem; margin-left: -9px; }
.stack .avatar:first-child { margin-left: 0; }
.flip__cue { font-family: var(--font-display); font-size: .82rem; font-weight: 600; color: var(--ind); display: inline-flex; align-items: center; gap: 6px; }
.flip__cue::after { content: ""; width: 14px; height: 14px; background: currentColor; -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round'%3E%3Cpath d='M4 12a8 8 0 0 1 14-5.3M20 12a8 8 0 0 1-14 5.3M18 3v4h-4M6 21v-4h4'/%3E%3C/svg%3E") center / contain no-repeat; mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round'%3E%3Cpath d='M4 12a8 8 0 0 1 14-5.3M20 12a8 8 0 0 1-14 5.3M18 3v4h-4M6 21v-4h4'/%3E%3C/svg%3E") center / contain no-repeat; }
.flip__back .flip__cue { color: var(--chip-ink); opacity: .75; margin-top: auto; }
.flip__back-title { font-family: var(--font-display); font-weight: 700; font-size: .9rem; opacity: .7; margin-bottom: 8px; }
.flip__names { display: grid; gap: 6px; margin-bottom: 16px; }
.flip__names li { font-family: var(--font-display); font-size: 1rem; font-weight: 550; line-height: 1.3; padding-left: 14px; position: relative; }
.flip__names li::before { content: ""; position: absolute; left: 0; top: .5em; width: 6px; height: 6px; border-radius: 50%; background: var(--ind); }

/* ---------- marquee ---------- */
.marquee { position: relative; display: grid; gap: 16px; margin: 0 calc(var(--gutter) * -1); padding: 0 var(--gutter); }
.marquee__row { overflow: hidden; -webkit-mask: linear-gradient(90deg, transparent, #000 6%, #000 94%, transparent); mask: linear-gradient(90deg, transparent, #000 6%, #000 94%, transparent); }
.marquee__inner { display: flex; gap: 16px; width: max-content; animation: marquee var(--dur, 60s) linear infinite; }
.marquee__row--rev .marquee__inner { animation-direction: reverse; }
.marquee:hover .marquee__inner, .marquee:focus-within .marquee__inner { animation-play-state: paused; }
.marquee__item { width: 320px; flex: none; }
.marquee__item .mcard { transition: transform .25s, border-color .25s; }
.marquee__item .mcard:hover { transform: translateY(-4px); border-color: var(--ind); }
@keyframes marquee { to { transform: translateX(calc(-50% - 8px)); } }
.marquee__toggle { justify-self: start; }
.marquee.is-grid .marquee__row { -webkit-mask: none; mask: none; overflow: visible; }
.marquee.is-grid .marquee__inner { animation: none; width: auto; display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
.marquee.is-grid .marquee__item { width: auto; }
.marquee.is-grid .is-clone { display: none; }

/* ---------- deck ---------- */
.deck { display: grid; grid-template-columns: minmax(0, 560px) auto; gap: 28px; align-items: center; }
.deck__stack { position: relative; }
.deck__card { position: absolute; inset: 0 0 auto 0; transition: transform .45s cubic-bezier(.3,.7,.2,1), opacity .45s; transform-origin: 50% 100%; }
.deck__card[data-pos="0"] { position: relative; z-index: 4; }
.deck__card[data-pos="1"] { z-index: 3; transform: translate(14px, 12px) rotate(2deg); }
.deck__card[data-pos="2"] { z-index: 2; transform: translate(28px, 24px) rotate(4deg); opacity: .9; }
.deck__card[data-pos="3"] { z-index: 1; transform: translate(40px, 34px) rotate(6deg); opacity: 0; }
.deck__card.is-leaving { transform: translate(-120%, -10px) rotate(-12deg); opacity: 0; z-index: 5; }
.deck__card .mcard { box-shadow: 0 18px 34px -24px rgba(0,0,0,.55); }
.deck__card .mcard__people { grid-template-columns: 1fr 1fr; }
.deck__controls { display: flex; flex-direction: column; align-items: center; gap: 12px; }
.deck__count { font-family: var(--font-display); font-weight: 650; margin: 0; font-variant-numeric: tabular-nums; }
.program--deck { overflow-x: clip; }
@media (max-width: 700px) {
  .deck { grid-template-columns: 1fr; padding-right: 22px; padding-bottom: 14px; }
  .deck__card[data-pos="1"] { transform: translate(8px, 9px) rotate(1.5deg); }
  .deck__card[data-pos="2"] { transform: translate(16px, 18px) rotate(3deg); }
  .deck__controls { flex-direction: row; justify-content: center; }
}

/* ---------- spotlight ---------- */
.spotlight { position: relative; padding: 28px 30px; border-radius: var(--r-md); background: var(--surface); border: 1px solid var(--rule-soft); overflow: hidden; }
.spotlight::before { content: ""; position: absolute; inset: 0 auto 0 0; width: 5px; background: linear-gradient(var(--acad), var(--ind)); }
.spotlight__title { font-family: var(--font-display); font-weight: 650; font-size: clamp(1.2rem, 2.2vw, 1.5rem); line-height: 1.3; max-width: 52ch; margin-bottom: 6px; }
.spotlight__people { display: flex; flex-wrap: wrap; gap: 18px 28px; margin-top: 16px; }
.spotlight__people li { display: flex; align-items: center; gap: 12px; }

@media (prefers-reduced-motion: reduce) {
  .marquee__row { overflow-x: auto; -webkit-mask: none; mask: none; }
  .marquee__inner { animation: none; }
  .marquee .is-clone { display: none; }
  .edu.is-armed::after, .edu.is-armed .edu__pad { transform: none; }
}
.flip__photo { position: relative; display: grid; place-items: center; background-color: var(--ind-soft); background-image: radial-gradient(color-mix(in srgb, var(--ind) 22%, transparent) 1.2px, transparent 1.4px); background-size: 16px 16px; }
.flip__photo img { position: absolute; inset: 0; }
.stack--big .avatar { width: 48px; height: 48px; font-size: .95rem; margin-left: -12px; border-width: 3px; }
.stack--big .avatar:first-child { margin-left: 0; }
.flip__n { font-family: var(--font-display); font-size: .85rem; color: var(--ink-3); }

/* ==========================================================================
   v3: credential badges, certification dies, membership ledger, zoom viewer
   ========================================================================== */
.ledger__what { display: flex; align-items: center; gap: 14px; }
.ledger__text { min-width: 0; }
.ledger__text em { display: block; font-weight: 400; color: var(--ink-2); font-size: .93rem; }
.ledger--members li { align-items: center; grid-template-columns: 72px 1fr minmax(160px, 30%); }
.ledger--members .ledger__year { display: flex; }

.badge { position: relative; flex: none; display: inline-grid; place-items: center; width: 56px; height: 56px; padding: 0; border-radius: 12px; border: 1px solid var(--rule-soft); background: #fff; color: var(--acad); font-family: var(--font-display); font-weight: 700; font-size: .95rem; overflow: hidden; cursor: default; }
.badge[data-zoom] { cursor: zoom-in; }
.badge[data-zoom]:hover { border-color: var(--acad); box-shadow: 0 6px 16px -10px rgba(0,0,0,.5); }
.badge img { position: absolute; inset: 4px; width: calc(100% - 8px); height: calc(100% - 8px); object-fit: contain; }
.badge--sm { width: 40px; height: 40px; border-radius: 9px; font-size: .8rem; }
.badge__ini { pointer-events: none; }
.badge:not(:has(img)) { background: var(--acad-soft); border-color: transparent; }

.cert { gap: 4px; }
.cert__die { display: block; width: 100%; aspect-ratio: 4 / 3; margin-bottom: 10px; padding: 10px; border: 0; border-radius: 6px; background: #fff; cursor: zoom-in; box-shadow: inset 0 0 0 1px rgba(0,0,0,.06); transition: transform .25s; }
.cert__die img { width: 100%; height: 100%; object-fit: contain; display: block; }
.cert__die:hover { transform: scale(1.03); }
.cert__die:focus-visible { outline-offset: 2px; }

@media (max-width: 640px) {
  .ledger--members li { grid-template-columns: 64px 1fr; }
  .ledger--members .ledger__by { grid-column: 2; margin-top: -10px; }
}

/* zoom viewer */
.zoom { border: 0; padding: 0; background: transparent; max-width: min(92vw, 640px); width: 100%; overflow: visible; }
.zoom::backdrop { background: rgba(12, 16, 22, .78); backdrop-filter: blur(4px); }
.zoom__frame { margin: 0; background: #fff; border-radius: 14px; padding: 22px; box-shadow: 0 30px 60px -20px rgba(0,0,0,.6); }
.zoom__frame img { width: 100%; max-height: 70vh; object-fit: contain; display: block; }
.zoom__cap { font-family: var(--font-display); font-weight: 600; color: #1C2430; text-align: center; margin: 14px 0 0; }
.zoom__close { position: absolute; top: -14px; right: -14px; width: 38px; height: 38px; border-radius: 50%; border: 0; background: var(--ink); color: var(--bg); cursor: pointer; display: grid; place-items: center; }
.zoom__close svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 2.2; stroke-linecap: round; }
.zoom[open] .zoom__frame { animation: zoom-in .22s cubic-bezier(.3,.7,.2,1); }
@keyframes zoom-in { from { transform: scale(.94); opacity: 0; } }
.certs { grid-template-columns: repeat(auto-fill, minmax(min(200px, 40vw), 1fr)); }
@media (max-width: 480px) {
  .cert { padding: 12px 12px 12px; }
  .cert__die { padding: 6px; margin-bottom: 8px; }
  .cert__name { font-size: 1.2rem; }
  .cert__full { font-size: .8rem; }
}

/* ==========================================================================
   v4: square portrait hero, quieter Venn palette
   ========================================================================== */
.hero__id { display: flex; align-items: flex-end; gap: 26px; margin-bottom: 22px; }
.hero__photo { flex: none; width: 160px; height: 160px; margin: 0; border-radius: 14px; object-fit: cover; border: 0; box-shadow: 0 0 0 4px var(--surface), 0 0 0 5.5px var(--ind), 0 18px 34px -22px rgba(0,0,0,.55); }
.hero__name { font-size: clamp(2.3rem, 4.4vw, 3.5rem); line-height: .96; margin-bottom: 4px; }
.hero__prefix { font-size: .36em; margin-bottom: .45em; }
.hero__headline { margin-bottom: 12px; }
.hero__roles { margin-bottom: 22px; }
@media (max-width: 480px) {
  .hero__id { gap: 18px; }
  .hero__photo { width: 112px; height: 112px; border-radius: 12px; }
}

:root { --v0: #3B4CCA; --v1: #17795A; --v2: #5C6B7A; }
:root[data-theme="dark"] { --v0: #93A0FF; --v1: #52C99D; --v2: #A3AEBA; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) { --v0: #93A0FF; --v1: #52C99D; --v2: #A3AEBA; } }
.venn__c { fill-opacity: .06; stroke-width: 1.5; }
.venn[data-focus] .venn__c, .venn.has-area .venn__c { fill-opacity: .03; }
.venn[data-focus="0"] .venn__c--0, .venn[data-focus="1"] .venn__c--1, .venn[data-focus="2"] .venn__c--2,
.venn.has-area .venn__c.is-on { fill-opacity: .14; stroke-width: 2.4; }
.venn__label { font-size: 14px; font-weight: 650; letter-spacing: .01em; }
.venn__t { font-weight: 500; fill: var(--ink-2); }
.venn__t--core { fill: var(--ink); font-weight: 700; }
.venn__core-ring { fill: var(--surface); stroke: var(--rule); stroke-width: 1.5; }
.venn__set { border-left-width: 3px; }

/* ==========================================================================
   v5: invited talks table (organisation logo + talk details)
   ========================================================================== */
.talks-table { width: 100%; border-collapse: collapse; margin-top: 8px; font-size: .97rem; }
.talks-table thead th { font-family: var(--font-display); font-size: .82rem; font-weight: 650; color: var(--ink-3); text-align: left; padding: 0 14px 10px; border-bottom: 1.5px solid var(--ink); white-space: nowrap; }
.talks-table thead th:first-child { padding-left: 0; }
.talks-table td, .talks-table .tt-org { padding: 16px 14px; border-bottom: 1px solid var(--rule-soft); vertical-align: middle; text-align: left; }
.talks-table tbody:hover td, .talks-table tbody:hover .tt-org { background: color-mix(in srgb, var(--surface) 70%, transparent); }
.tt-org { padding-left: 0 !important; width: 34%; font-weight: inherit; }
.tt-org { display: table-cell; }
.tt-org > .orglogo { vertical-align: middle; margin-right: 14px; }
.tt-org__text { display: inline-flex; flex-direction: column; vertical-align: middle; max-width: calc(100% - 82px); }
.tt-org__name { font-family: var(--font-display); font-weight: 650; font-size: 1.05rem; line-height: 1.25; }
.tt-org__name a { text-decoration: none; }
.tt-org__name a:hover { text-decoration: underline; }
.tt-org__place { font-family: var(--font-display); font-size: .85rem; color: var(--ink-3); margin-top: 2px; }
.tt-talk__title { display: block; font-weight: 600; line-height: 1.4; }
.tt-talk__type { display: block; font-family: var(--font-display); font-size: .85rem; color: var(--ink-3); margin-top: 2px; }
.tt-talk__type--only { font-size: .95rem; color: var(--ink-2); margin-top: 0; }
.talks-table td[data-label="Date"], .talks-table td[data-label="Audience"] { font-family: var(--font-display); font-size: .9rem; color: var(--ink-2); white-space: nowrap; }
.tt-dash { color: var(--rule); }

.mode { display: inline-block; font-family: var(--font-display); font-size: .8rem; font-weight: 650; padding: 2px 10px; border-radius: 999px; white-space: nowrap; background: var(--rule-soft); color: var(--ink-2); }
.mode--in-person, .mode--offline { background: var(--ind-soft); color: var(--ind); }
.mode--online { background: var(--acad-soft); color: var(--acad); }
.mode--hybrid { background: color-mix(in srgb, var(--signal) 20%, transparent); color: var(--ink); }

.orglogo { position: relative; display: inline-grid; place-items: center; flex: none; width: 64px; height: 64px; border-radius: 12px; background: #fff; border: 1px solid var(--rule-soft); overflow: hidden; color: var(--acad); font-family: var(--font-display); font-weight: 700; font-size: 1rem; }
.orglogo img { position: absolute; inset: 6px; width: calc(100% - 12px); height: calc(100% - 12px); object-fit: contain; }
.orglogo:not(:has(img)) { background: var(--acad-soft); border-color: transparent; }

@media (max-width: 760px) {
  .talks-table, .talks-table tbody, .talks-table tr, .talks-table td, .talks-table .tt-org { display: block; width: auto; }
  .talks-table thead { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
  .talks-table tbody { border: 1px solid var(--rule-soft); border-radius: var(--r-md); background: var(--surface); padding: 16px; margin-bottom: 14px; }
  .talks-table tr + tr { border-top: 1px dashed var(--rule); margin-top: 12px; padding-top: 12px; }
  .talks-table td, .talks-table .tt-org { border: 0; padding: 4px 0 !important; background: none !important; }
  .talks-table .tt-org { display: flex; align-items: center; gap: 14px; padding-bottom: 12px !important; }
  .tt-org > .orglogo { margin-right: 0; }
  .tt-org__text { max-width: none; }
  .talks-table td[data-label] { display: grid; grid-template-columns: 86px 1fr; gap: 10px; white-space: normal; }
  .talks-table td[data-label]::before { content: attr(data-label); font-family: var(--font-display); font-size: .8rem; color: var(--ink-3); padding-top: 2px; }
  .talks-table td.is-empty { display: none; }
}

/* ==========================================================================
   v7: photo carousel (Teaching, Mentoring)
   ========================================================================== */
.pcar { position: relative; margin: 0 0 clamp(32px, 5vw, 52px); border-radius: 14px; overflow: hidden; background: var(--rule-soft); box-shadow: 0 22px 44px -30px rgba(0,0,0,.55); }
.pcar__viewport { overflow: hidden; touch-action: pan-y; }
.pcar__track { display: flex; margin: 0; padding: 0; list-style: none; will-change: transform; }
.pcar__track.is-animating { transition: transform .6s cubic-bezier(.3,.7,.2,1); }
.pcar__slide { flex: 0 0 100%; }
.pcar__btn { display: block; width: 100%; aspect-ratio: 16 / 7; padding: 0; border: 0; background: none; cursor: zoom-in; }
.pcar__btn img { width: 100%; height: 100%; object-fit: cover; object-position: center 35%; display: block; user-select: none; -webkit-user-drag: none; }
.pcar__arrow { position: absolute; top: 50%; transform: translateY(-50%); z-index: 2; display: grid; place-items: center; width: 44px; height: 44px; border-radius: 50%; border: 0; background: rgba(255,255,255,.88); color: #1C2430; cursor: pointer; box-shadow: 0 6px 18px -8px rgba(0,0,0,.6); opacity: 0; transition: opacity .25s, background .2s; }
.pcar__arrow svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; }
.pcar__arrow:hover { background: #fff; }
.pcar__arrow--prev { left: 16px; }
.pcar__arrow--next { right: 16px; }
.pcar:hover .pcar__arrow, .pcar:focus-within .pcar__arrow { opacity: 1; }
.pcar__dots { position: absolute; left: 0; right: 0; bottom: 0; display: flex; justify-content: center; gap: 7px; padding: 30px 0 14px; background: linear-gradient(transparent, rgba(0,0,0,.38)); pointer-events: none; }
.pcar__dots button { pointer-events: auto; width: 8px; height: 8px; padding: 0; border: 0; border-radius: 999px; background: rgba(255,255,255,.55); cursor: pointer; transition: width .3s, background .3s; }
.pcar__dots button[aria-current="true"] { width: 24px; background: #fff; }
@media (hover: none) { .pcar__arrow { opacity: 1; } }
@media (max-width: 640px) {
  .pcar { border-radius: 10px; margin-left: calc(var(--gutter) * -0.5); margin-right: calc(var(--gutter) * -0.5); }
  .pcar__btn { aspect-ratio: 4 / 3; }
  .pcar__arrow { width: 36px; height: 36px; }
  .pcar__arrow--prev { left: 10px; } .pcar__arrow--next { right: 10px; }
}
@media (prefers-reduced-motion: reduce) { .pcar__track.is-animating { transition: none; } }
.mentor-intro + .pcar { margin-top: clamp(28px, 4vw, 44px); }
.spotlight + .spotlight { margin-top: 14px; }