/* ---------- fonts (self-hosted, SIL OFL) ---------- */
@font-face { font-family: "Newsreader"; font-style: normal; font-weight: 200 800; font-display: swap; src: url(fonts/newsreader-latin-opsz-normal.woff2) format("woff2"); }
@font-face { font-family: "Newsreader"; font-style: italic; font-weight: 200 800; font-display: swap; src: url(fonts/newsreader-latin-opsz-italic.woff2) format("woff2"); }
@font-face { font-family: "Hanken Grotesk"; font-style: normal; font-weight: 100 900; font-display: swap; src: url(fonts/hanken-grotesk-latin-wght-normal.woff2) format("woff2"); }
@font-face { font-family: "IBM Plex Mono"; font-style: normal; font-weight: 400; font-display: swap; src: url(fonts/ibm-plex-mono-latin-400-normal.woff2) format("woff2"); }
@font-face { font-family: "IBM Plex Mono"; font-style: normal; font-weight: 500; font-display: swap; src: url(fonts/ibm-plex-mono-latin-500-normal.woff2) format("woff2"); }

/* ---------- tokens ---------- */
:root {
  --paper: #ECEEE7;      /* drafting vellum */
  --panel: #E2E6DB;      /* instrument panel */
  --ink: #15201B;        /* green-black ink */
  --graphite: #525D56;   /* secondary text */
  --rule: #C9CFC2;       /* hairlines */
  --signal: #13A052;     /* trace, marks */
  --signal-ink: #0A6936; /* green text on paper */
  --fault: #A8412A;      /* broken state */

  --serif: "Newsreader", "Iowan Old Style", Georgia, serif;
  --sans: "Hanken Grotesk", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;

  --margin-col: 190px;
  --gap: 56px;
  --max: 1180px;
}
:root[data-theme="dark"] {
  --paper: #0F1512; --panel: #16201B; --ink: #E3E8DD; --graphite: #9BA79F;
  --rule: #28332D; --signal: #3AD27A; --signal-ink: #5EDF95; --fault: #E48466;
  color-scheme: dark;
}

/* ---------- base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 72px; }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font: 400 17px/1.6 var(--sans);
  font-feature-settings: "ss01";
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
h1, h2, h3, p, ul, ol, dl, dd, figure { margin: 0; }
ul, ol { padding: 0; list-style: none; }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--signal-ink); }
:focus-visible { outline: 2px solid var(--signal-ink); outline-offset: 3px; border-radius: 2px; }
::selection { background: var(--signal); color: var(--paper); }
.dim { color: var(--graphite); }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: 16px; top: -40px; background: var(--ink); color: var(--paper); padding: 6px 10px; z-index: 20; }
.skip:focus { top: 8px; }

.label, .meta, .date, .readout, .stack, .top nav, .theme, .copy,
.switch button, .gauge-caption, .checks dt, figcaption, .flow, .toolkit dt, .foot, .at {
  font-family: var(--mono);
}
.label {
  font-size: 12px; letter-spacing: .08em; text-transform: uppercase; font-weight: 500;
  color: var(--signal-ink);
}
.meta, .date { font-size: 13px; line-height: 1.5; color: var(--graphite); margin-top: 8px; }
.meta span { display: block; }
.date span { display: block; }

/* ---------- header ---------- */
.top {
  position: sticky; top: env(safe-area-inset-top, 0px); z-index: 10;
  display: flex; align-items: center; gap: 28px;
  max-width: var(--max); margin: 0 auto; padding: 16px 24px;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
  border-bottom: 1px solid transparent;
}
.top.scrolled { border-bottom-color: var(--rule); }
.brand { font-family: var(--serif); font-size: 19px; text-decoration: none; letter-spacing: -.01em; }
.top nav { display: flex; gap: 22px; margin-left: auto; font-size: 13px; }
.top nav a { text-decoration: none; color: var(--graphite); }
.top nav a:hover, .top nav a[aria-current="true"] { color: var(--ink); }
.theme {
  font-size: 12px; background: none; border: 1px solid var(--rule); color: var(--graphite);
  padding: 4px 10px; border-radius: 999px; cursor: pointer;
}
.theme:hover { color: var(--ink); border-color: var(--graphite); }

/* ---------- page grid ---------- */
.page { position: relative; max-width: var(--max); margin: 0 auto; padding: 0 24px 40px; }
.row {
  display: grid; grid-template-columns: var(--margin-col) minmax(0, 1fr);
  column-gap: var(--gap); padding-left: 44px;
}
.body { max-width: 780px; }

h1, h2, h3 { text-wrap: balance; }
h1 {
  font-family: var(--serif); font-weight: 400; font-optical-sizing: auto;
  font-size: clamp(52px, 8.4vw, 112px); line-height: .95; letter-spacing: -.035em;
}
.claim {
  font-family: var(--serif); font-weight: 400; font-style: italic;
  font-size: clamp(26px, 3.3vw, 40px); line-height: 1.15; letter-spacing: -.015em;
  margin-top: 22px; max-width: 24ch;
}
.lede { font-size: 19px; line-height: 1.6; color: var(--graphite); max-width: 58ch; margin-top: 26px; }
.links { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 26px; margin-top: 36px; font-size: 16px; }
.links a:not(.btn) { text-decoration: underline; text-decoration-color: var(--rule); }
.links a:not(.btn):hover { text-decoration-color: currentColor; }
.btn {
  display: inline-block; text-decoration: none; background: var(--ink); color: var(--paper);
  padding: 11px 18px; border-radius: 3px; font-weight: 500;
}
.btn:hover { color: var(--paper); background: var(--signal-ink); }

/* ---------- sections ---------- */
.section { border-top: 1px solid var(--rule); padding: 72px 0 24px; }
.section-head { margin-bottom: 40px; }
.section-title {
  font-family: var(--serif); font-weight: 400; font-size: clamp(28px, 3vw, 38px);
  line-height: 1.15; letter-spacing: -.02em; max-width: 24ch;
}

/* ---------- cases ---------- */
.case { padding-top: 40px; padding-bottom: 48px; }
.case + .case .body { border-top: 1px solid var(--rule); padding-top: 40px; }
.case + .case .margin { padding-top: 41px; }
.case h3 {
  font-family: var(--serif); font-weight: 500; font-size: clamp(24px, 2.4vw, 30px);
  line-height: 1.2; letter-spacing: -.015em; max-width: 30ch; margin-bottom: 18px;
}
.case p { max-width: 62ch; }
.case p + p { margin-top: 14px; }
.stack { font-size: 12.5px; color: var(--graphite); margin-top: 22px; letter-spacing: .01em; }

.split { display: grid; grid-template-columns: minmax(0, 1fr) 190px; gap: 40px; align-items: start; }
.readouts { display: grid; gap: 18px; border-left: 1px solid var(--rule); padding-left: 20px; }
.readouts dt { font-family: var(--serif); font-size: 30px; line-height: 1; letter-spacing: -.02em; font-variant-numeric: tabular-nums lining-nums; }
.readouts dd { font-family: var(--mono); font-size: 12px; color: var(--graphite); margin-top: 6px; line-height: 1.4; }

/* ---------- research ---------- */
.lede + .lede { margin-top: 16px; }
.prose { max-width: 62ch; margin-top: 22px; }
.research-list { margin-top: 28px; }
.research-list a { text-decoration-color: var(--rule); }
.research-list a:hover { text-decoration-color: currentColor; }
.h-link { text-decoration: none; }
.h-link:hover { text-decoration: underline; text-decoration-thickness: 1px; }
.stack a { color: var(--signal-ink); }

/* ---------- talks ---------- */
.talks > li { padding-top: 26px; padding-bottom: 26px; }
.talks > li .body { border-top: 1px solid var(--rule); padding-top: 26px; }
.talks > li .margin { padding-top: 26px; }
.talks .date { margin-top: 0; color: var(--ink); }
.talk { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 28px; align-items: start; }
.thumb {
  position: relative; display: block; aspect-ratio: 16 / 9; max-width: 100%; overflow: hidden;
  background: var(--panel); border: 1px solid var(--rule); border-radius: 4px; text-decoration: none;
}
.thumb-text { position: absolute; left: 12px; top: 10px; font-family: var(--serif); font-size: 22px; line-height: 1.05; letter-spacing: -.01em; color: var(--graphite); }
.thumb img { position: relative; width: 100%; height: 100%; object-fit: cover; display: block; filter: saturate(.85); transition: filter .2s; }
.thumb:hover img { filter: none; }
.play {
  position: absolute; left: 10px; bottom: 10px; font-family: var(--mono); font-size: 11.5px;
  background: var(--ink); color: var(--paper); padding: 3px 8px; border-radius: 3px;
}
.talk h3 { font-family: var(--serif); font-weight: 500; font-size: 23px; line-height: 1.25; letter-spacing: -.01em; }
.talk p { color: var(--graphite); font-size: 16px; margin-top: 8px; max-width: 60ch; }
.watch { display: inline-block; margin-top: 12px; font-size: 15px; color: var(--signal-ink); }

/* ---------- experience: job header with its work beneath ---------- */
.job-head { padding-top: 28px; padding-bottom: 6px; }
.job-head .body { border-top: 1px solid var(--rule); padding-top: 28px; }
.job-head .margin { padding-top: 28px; }
.job-head .date { margin-top: 0; color: var(--ink); }
.job-head h3 { font-size: 20px; font-weight: 600; line-height: 1.35; }
.job-head .at { display: block; font-size: 12.5px; font-weight: 400; color: var(--graphite); margin-top: 4px; }
.job-head p { margin-top: 10px; color: var(--graphite); max-width: 62ch; font-size: 16px; }
.job-head p + p { margin-top: 12px; }
.job .case { padding-top: 18px; padding-bottom: 22px; }
.job .case .body { border-left: 2px solid var(--rule); padding-left: 24px; }
.job .case + .case .body { border-top: 0; padding-top: 0; }
.job .case + .case .margin { padding-top: 0; }
.job .case h3 { font-size: clamp(20px, 2vw, 24px); margin-bottom: 14px; }
.job .case--feature h3 { font-size: clamp(24px, 2.6vw, 32px); }
.job:last-child { padding-bottom: 24px; }

/* ---------- also ---------- */
.columns { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; }
.small-h { font-family: var(--mono); font-size: 12px; letter-spacing: .08em; text-transform: uppercase; font-weight: 500; color: var(--graphite); margin-bottom: 16px; }
.plain li { font-size: 16px; padding: 12px 0; border-top: 1px solid var(--rule); }
.plain li:last-child { border-bottom: 1px solid var(--rule); }
.plain strong { font-weight: 600; }
.toolkit { margin-top: 0; }
.small-h--gap { margin-top: 44px; }
.columns { margin-top: 36px; }
.toolkit > div { display: grid; grid-template-columns: 200px 1fr; gap: 16px; padding: 10px 0; border-top: 1px solid var(--rule); font-size: 16px; }
.toolkit > div:last-child { border-bottom: 1px solid var(--rule); }
.toolkit dt { font-size: 12.5px; color: var(--graphite); padding-top: 3px; }

/* ---------- contact ---------- */
.contact { padding-bottom: 80px; }
.contact .claim { font-style: normal; font-size: clamp(34px, 4.4vw, 56px); max-width: 22ch; margin-top: 0; letter-spacing: -.025em; }
.email-row { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; margin-top: 32px; }
.btn--big { font-size: 18px; padding: 14px 22px; }
.btn--line { background: none; color: var(--ink); border: 1px solid var(--ink); }
.btn--line:hover { background: var(--ink); color: var(--paper); }
.copy { font-size: 13px; background: none; border: 1px solid var(--rule); color: var(--graphite); border-radius: 3px; padding: 12px 14px; cursor: pointer; }
.copy:hover { color: var(--ink); border-color: var(--graphite); }
.links--quiet { margin-top: 24px; font-size: 15px; }

/* ---------- footer ---------- */
.foot { max-width: var(--max); margin: 0 auto; padding: 28px 24px 40px; border-top: 1px solid var(--rule); font-size: 12px; display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px; }

/* ---------- responsive ---------- */
@media (max-width: 980px) {
  :root { --margin-col: 150px; --gap: 32px; }
  .split { grid-template-columns: 1fr; gap: 24px; }
  .readouts { border-left: 0; padding-left: 0; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); border-top: 1px solid var(--rule); padding-top: 18px; }
}
@media (max-width: 760px) {
  html { scroll-padding-top: 86px; }
  .page { padding: 0 16px 24px; }
  .top { padding: 10px 16px 8px; gap: 10px; flex-wrap: wrap; }
  .top nav {
    order: 3; width: 100%; margin-left: 0; gap: 0;
    justify-content: space-between; font-size: 12px;
  }
  .brand { font-size: 17px; margin-right: auto; }
  .row { display: block; padding-left: 0; }
  .margin { display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 14px; margin-bottom: 14px; }
  .meta span { display: inline; }
  .meta span + span::before { content: "· "; }
  .date span { display: inline; }
  .margin .meta, .margin .date { margin-top: 0; }
  .case + .case .margin { padding-top: 0; }
  .case + .case .body { border-top: 0; padding-top: 0; }
  .case + .case { border-top: 1px solid var(--rule); }
  .job-head { border-top: 1px solid var(--rule); }
  .job-head .margin { padding-top: 0; }
  .job-head .body { border-top: 0; padding-top: 0; }
  .job .case { border-top: 0; }
  .job .case .body { padding-left: 16px; }
  .talks > li { border-top: 1px solid var(--rule); }
  .talks > li .margin { padding-top: 0; }
  .talks > li .body { border-top: 0; padding-top: 0; }
  .talk { grid-template-columns: 1fr; gap: 16px; }
  .section { padding-top: 56px; }
  .columns { grid-template-columns: 1fr; gap: 28px; }
  .toolkit > div { grid-template-columns: 1fr; gap: 2px; }
  .lede { font-size: 17px; }
  .btn--big { font-size: 15px; word-break: break-all; }
}
@media (max-width: 380px) {
  .top nav { font-size: 11px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}
@media print {
  .top, .tabs, .theme, .copy { display: none; }
  .panel[hidden] { display: block; }
  body { background: #fff; color: #000; }
}

/* ---------- more about me ---------- */
.group .margin .date { margin-top: 6px; }
.milestones { margin-top: 22px; max-width: 680px; }
.milestones > div { display: grid; grid-template-columns: 96px 1fr; gap: 16px; padding: 10px 0; border-top: 1px solid var(--rule); }
.milestones > div:last-child { border-bottom: 1px solid var(--rule); }
.milestones dt { font-family: var(--mono); font-size: 12.5px; color: var(--graphite); padding-top: 3px; }
.milestones dd { margin: 0; }
@media (max-width: 760px) { .milestones > div { grid-template-columns: 72px 1fr; } }

.chips { margin-top: 14px; }
.chip {
  display: inline-block; margin: 4px 6px 0 0; padding: 4px 10px; border: 1px solid var(--rule); border-radius: 999px;
  font-family: var(--sans); font-size: 13px; line-height: 1.4; color: var(--signal-ink); background: var(--panel);
  text-decoration: none; white-space: nowrap; vertical-align: baseline;
}
.chip:hover, .chip:focus-visible { border-color: var(--signal); color: var(--ink); }
.milestones dd .chip { margin-left: 4px; }
.embed { margin-top: 26px; border: 1px solid var(--rule); border-radius: 6px; overflow: hidden; background: var(--panel); }
.embed iframe { display: block; width: 100%; border: 0; }
.embed--video { max-width: 680px; aspect-ratio: 16 / 9; }
.embed--video iframe { height: 100%; }
.embed--post { max-width: 420px; }
.pair { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 24px; margin-top: 22px; max-width: 860px; }
.pair figure .embed { margin-top: 0; }
.pair figcaption { margin-top: 12px; font-family: var(--sans); font-size: 15px; color: var(--graphite); }
.pair figcaption strong { color: var(--ink); font-weight: 600; }
.preview { display: block; border: 1px solid var(--rule); border-radius: 6px; overflow: hidden; background: var(--panel); text-decoration: none; }
.preview img { display: block; width: 100%; aspect-ratio: 4 / 5; object-fit: cover; object-position: top; }
.preview-src { display: block; padding: 10px 12px; font-family: var(--mono); font-size: 12px; color: var(--signal-ink); }
.pair figcaption .chip { margin-top: 10px; }
.cert { margin-top: 26px; max-width: 420px; }
.cert img { display: block; width: 100%; border: 1px solid var(--rule); border-radius: 6px; }
.cert figcaption { margin-top: 10px; font-family: var(--sans); font-size: 14px; color: var(--graphite); }

.gallery { position: relative; display: grid; grid-template-columns: 2fr 1fr; grid-template-rows: repeat(3, minmax(0, 1fr)); gap: 6px;
  max-width: 680px; aspect-ratio: 16 / 10; margin-top: 26px; border-radius: 6px; overflow: hidden; text-decoration: none; }
.gallery img { display: block; width: 100%; height: 100%; min-height: 0; object-fit: cover; }
.gallery .g-main { grid-row: 1 / 4; }
.gallery-cta { position: absolute; left: 12px; bottom: 12px; padding: 4px 10px; border: 1px solid var(--rule); border-radius: 999px;
  background: var(--paper); color: var(--signal-ink); font-family: var(--sans); font-size: 13px; }
.gallery:hover .gallery-cta, .gallery:focus-visible .gallery-cta { border-color: var(--signal); color: var(--ink); }

/* ---------- landing and tabs ---------- */
.top { position: static; justify-content: flex-end; }
.landing { text-align: center; padding: clamp(56px, 13vh, 132px) 0 clamp(48px, 9vh, 96px); }
.landing .claim { margin: 22px auto 0; max-width: 46ch; }
.landing-cv { margin-top: 30px; }
.landing-cv .dim { color: inherit; opacity: .7; }
.tabs {
  position: sticky; top: 0; z-index: 5; background: var(--paper);
  display: flex; flex-wrap: wrap; justify-content: center; gap: 8px 34px;
  border-bottom: 1px solid var(--rule);
  font-family: var(--mono); font-size: 13px; letter-spacing: .07em; text-transform: uppercase;
}
.panels { min-height: 100vh; }
.panel:not([hidden]) { animation: rise .28s ease-out; }
@keyframes rise { from { opacity: 0; transform: translateY(6px); } }
@media (prefers-reduced-motion: reduce) { .panel:not([hidden]) { animation: none; } }
.tabs a { text-decoration: none; color: var(--graphite); padding: 10px 0 13px; border-bottom: 2px solid transparent; margin-bottom: -1px; }
.tabs a:hover { color: var(--ink); }
.tabs a[aria-selected="true"] { color: var(--ink); border-bottom-color: var(--signal); }
.panel { padding-top: 16px; }
.panel .row:first-child .body { border-top: 0; }
.post h3 { font-family: var(--serif); font-weight: 500; font-size: 22px; line-height: 1.25; }
.post p { color: var(--graphite); font-size: 16px; margin-top: 6px; max-width: 62ch; }
.post { padding: 22px 0; }
.post .body { border-top: 1px solid var(--rule); padding-top: 22px; }
.post .margin { padding-top: 22px; }
.post:first-child .body { border-top: 0; padding-top: 0; }
.post:first-child .margin { padding-top: 0; }
.job-head .stack { margin-top: 12px; }
@media (max-width: 760px) {
  /* one swipeable row so the pinned bar stays short on phones */
  .tabs { flex-wrap: nowrap; justify-content: flex-start; gap: 22px; font-size: 12px; overflow-x: auto; scrollbar-width: none; }
  .tabs::-webkit-scrollbar { display: none; }
  .tabs a { flex: none; white-space: nowrap; }
}