/* ==========================================================================
   Perseus Sepahi
   Night over open ground. The palette is the potential-temperature scale of
   the home-page flow: cold surface air in blue, warm air aloft in amber, on
   the deep blue of a clear night (or the pale blue of dawn in light mode).
   Instrument Sans carries the interface and headings, condensed for display;
   Newsreader carries reading text and mathematics.
   ========================================================================== */

:root {
  --paper: #e9eef3;
  --paper-2: #dde5ed;
  --ink: #0f1d2e;
  --ink-2: #44566b;
  --ink-3: #6c7d90;
  --rule: #c6d1dc;
  --rule-2: #a6b5c5;
  --cold: #1d6aa5;
  --warm: #9a5008;
  --accent: var(--warm);
  --on-accent: #fff8ef;
  --k-edu: #1d6aa5;
  --k-res: #9a5008;
  --k-ind: #2c7a4b;
  --k-tea: #6650b0;
  --veil: rgb(233 238 243 / .9);
  --glass: rgb(240 244 248 / .66);
  --globe-hi: #f6f9fb;
  --globe-lo: #cfdae5;
  --theta: linear-gradient(90deg, #12337a, #1a6ea8 30%, #61737f 55%, #bd6d0f 78%, #9e3d1a);
  --theta-up: linear-gradient(0deg, #12337a, #1a6ea8 30%, #61737f 55%, #bd6d0f 78%, #9e3d1a);
  --shadow: rgb(15 29 46 / .2);

  --serif: "Newsreader", "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --sans: "Instrument Sans", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  --page: 76rem;
  --pad: clamp(1rem, 5vw, 3rem);
  --margin: 13rem;
  --gutter: clamp(1.5rem, 4vw, 3.5rem);
  --measure: 38rem;
  --ease: cubic-bezier(.2, .7, .2, 1);
  --radius: 14px;

  color-scheme: light;
}

:root[data-theme="dark"] {
  --paper: #0c1726;
  --paper-2: #13233a;
  --ink: #e6edf5;
  --ink-2: #9fb1c6;
  --ink-3: #71869d;
  --rule: #1f3149;
  --rule-2: #2f4664;
  --cold: #63c2e6;
  --warm: #f3b257;
  --on-accent: #1d1305;
  --k-edu: #63c2e6;
  --k-res: #f3b257;
  --k-ind: #8fd3a8;
  --k-tea: #b9a6f0;
  --veil: rgb(12 23 38 / .88);
  --glass: rgb(12 23 38 / .55);
  --globe-hi: #1c3352;
  --globe-lo: #0c1726;
  --theta: linear-gradient(90deg, #2954b8, #45ade0 30%, #d6e6f0 55%, #f5b55c 78%, #e66b38);
  --theta-up: linear-gradient(0deg, #2954b8, #45ade0 30%, #d6e6f0 55%, #f5b55c 78%, #e66b38);
  --shadow: rgb(0 0 0 / .5);
  color-scheme: dark;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #0c1726;
    --paper-2: #13233a;
    --ink: #e6edf5;
    --ink-2: #9fb1c6;
    --ink-3: #71869d;
    --rule: #1f3149;
    --rule-2: #2f4664;
    --cold: #63c2e6;
    --warm: #f3b257;
    --on-accent: #1d1305;
    --k-edu: #63c2e6;
    --k-res: #f3b257;
    --k-ind: #8fd3a8;
    --k-tea: #b9a6f0;
    --veil: rgb(12 23 38 / .88);
    --glass: rgb(12 23 38 / .55);
    --globe-hi: #1c3352;
    --globe-lo: #0c1726;
    --theta: linear-gradient(90deg, #2954b8, #45ade0 30%, #d6e6f0 55%, #f5b55c 78%, #e66b38);
  --theta-up: linear-gradient(0deg, #2954b8, #45ade0 30%, #d6e6f0 55%, #f5b55c 78%, #e66b38);
    --shadow: rgb(0 0 0 / .5);
    color-scheme: dark;
  }
}

/* ---------- base ---------- */

*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  overflow-x: clip;
  scroll-padding-top: 5.5rem;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.55;
  font-kerning: normal;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  transition: background-color .4s var(--ease), color .4s var(--ease);
}
body.home { background: transparent; }
:root:has(body.home) { background: var(--paper); }

img, svg { display: block; max-width: 100%; }
img { height: auto; }

h1, h2, h3, h4 {
  margin: 0;
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -.012em;
  text-wrap: balance;
}

p { margin: 0 0 1em; text-wrap: pretty; }

a {
  color: inherit;
  text-decoration-line: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: .22em;
  text-decoration-color: var(--rule-2);
  transition: color .2s var(--ease), text-decoration-color .2s var(--ease);
}
a:hover { text-decoration-color: var(--warm); }

:focus-visible { outline: 2px solid var(--warm); outline-offset: 3px; border-radius: 3px; }
::selection { background: color-mix(in srgb, var(--cold) 30%, transparent); }

code, pre, kbd { font-family: var(--mono); }
sup, sub { line-height: 0; }

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}
[hidden] { display: none !important; }

.skip {
  position: absolute;
  left: 1rem; top: -4rem;
  z-index: 50;
  padding: .6rem 1rem;
  background: var(--ink);
  color: var(--paper);
  font-size: .85rem;
  border-radius: 999px;
  text-decoration: none;
}
.skip:focus { top: 1rem; }

.page {
  max-width: var(--page);
  margin-inline: auto;
  padding-inline: var(--pad);
}

/* ---------- type roles ---------- */

.kicker {
  margin: 0 0 1rem;
  font-size: .86rem;
  color: var(--ink-2);
}
.kicker a { color: inherit; text-decoration: none; }
.kicker a:hover { color: var(--warm); }
.kicker .sep { margin-inline: .6em; color: var(--rule-2); }

.title {
  margin: 0 0 clamp(1.25rem, 3vw, 2rem) -.04em;
  font-size: clamp(3rem, 9vw, 6.5rem);
  font-weight: 600;
  font-stretch: 75%;
  line-height: .9;
  letter-spacing: -.03em;
}

.lede {
  max-width: 34em;
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(1.2rem, 2.2vw, 1.5rem);
  font-weight: 380;
  line-height: 1.42;
}

/* ---------- masthead ---------- */

.top {
  position: sticky;
  top: 0;
  z-index: 30;
  background: color-mix(in srgb, var(--paper) 78%, transparent);
  -webkit-backdrop-filter: blur(14px) saturate(1.3);
  backdrop-filter: blur(14px) saturate(1.3);
  border-bottom: 1px solid color-mix(in srgb, var(--rule) 70%, transparent);
}
.home .top {
  position: fixed;
  inset: 0 0 auto;
  background: transparent;
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
  border-bottom-color: transparent;
  transition: background-color .3s var(--ease), border-color .3s var(--ease);
}
.home.scrolled .top {
  background: color-mix(in srgb, var(--paper) 72%, transparent);
  -webkit-backdrop-filter: blur(14px) saturate(1.3);
  backdrop-filter: blur(14px) saturate(1.3);
  border-bottom-color: color-mix(in srgb, var(--rule) 70%, transparent);
}

.masthead {
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: center;
  column-gap: clamp(1.25rem, 3vw, 2.5rem);
  padding-block: .85rem;
}

.wordmark {
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: -.01em;
  text-decoration: none;
  white-space: nowrap;
}

.nav {
  display: flex;
  gap: clamp(.9rem, 2.2vw, 1.8rem);
  font-size: .9rem;
}
.nav a {
  position: relative;
  padding-block: .35rem;
  color: var(--ink-2);
  text-decoration: none;
}
.nav a:hover, .nav a[aria-current] { color: var(--ink); }
.nav a[aria-current]::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 2px;
  border-radius: 2px;
  background: var(--theta);
}

.tools { display: flex; gap: .15rem; margin-right: -.5rem; }
.tool {
  display: grid;
  place-items: center;
  width: 2.25rem; height: 2.25rem;
  padding: 0;
  border: 0;
  border-radius: 999px;
  background: none;
  color: var(--ink-2);
  cursor: pointer;
  text-decoration: none;
  transition: color .2s var(--ease), background-color .2s var(--ease);
}
.tool:hover { color: var(--ink); background: color-mix(in srgb, var(--ink) 9%, transparent); }
.tool svg { width: 1.05rem; height: 1.05rem; }

.i-sun { display: none; }
:root[data-theme="dark"] .i-sun { display: block; }
:root[data-theme="dark"] .i-moon { display: none; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .i-sun { display: block; }
  :root:not([data-theme="light"]) .i-moon { display: none; }
}

/* ---------- page grid ---------- */

.head { padding-top: clamp(3rem, 8vw, 6rem); }

.head-body {
  display: grid;
  grid-template-columns: var(--margin) minmax(0, 1fr);
  column-gap: var(--gutter);
}
.head-body > * { grid-column: 2; }

.sec {
  display: grid;
  grid-template-columns: var(--margin) minmax(0, 1fr);
  column-gap: var(--gutter);
  margin-top: clamp(4.5rem, 10vw, 7.5rem);
  padding-top: 1.4rem;
  border-top: 1px solid var(--rule);
}
.head ~ .sec, .figure + .sec, .app-hero ~ .sec { margin-top: clamp(3.5rem, 7vw, 5.25rem); }

.sec-label, .sec-title {
  align-self: start;
  position: sticky;
  top: 5rem;
  font-size: clamp(1.5rem, 2.6vw, 2.1rem);
  font-weight: 600;
  font-stretch: 78%;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--ink);
}
.sec-body { min-width: 0; }

.links {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem 1.5rem;
  margin: 1.75rem 0 0;
  font-size: .9rem;
}

.more { margin: 2rem 0 0; font-size: .9rem; }
.more a {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  padding-bottom: .25rem;
  border-bottom: 1px solid var(--rule-2);
  text-decoration: none;
}
.more a:hover { color: var(--warm); border-color: var(--warm); }
.more svg { width: .95em; height: .95em; transition: transform .3s var(--ease); }
.more a:hover svg { transform: translateX(3px); }

/* ---------- home figure ---------- */

.figure { margin: clamp(2.5rem, 6vw, 4.5rem) 0 0; }

.figure-band {
  width: 100vw;
  height: clamp(220px, 27vw, 400px);
  margin-left: calc(50% - 50vw);
  color: var(--ink);
  -webkit-mask-image:
    linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent),
    linear-gradient(180deg, transparent, #000 12%, #000 88%, transparent);
  -webkit-mask-composite: source-in;
  mask-image:
    linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent),
    linear-gradient(180deg, transparent, #000 12%, #000 88%, transparent);
  mask-composite: intersect;
}

.figure figcaption {
  display: grid;
  grid-template-columns: var(--margin) minmax(0, 1fr);
  column-gap: var(--gutter);
  margin-top: 1rem;
}
.figure-text { grid-column: 2; max-width: var(--measure); }
.figure-text p { margin: 0; font-size: .95rem; line-height: 1.55; color: var(--ink-2); }
.fig-num {
  margin-right: .75em;
  font-family: var(--sans);
  font-size: .68rem;
  font-weight: 500;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--ink);
}

.equations {
  display: grid;
  gap: 1rem;
  margin-top: 1.6rem;
  padding-top: 1.4rem;
  border-top: 1px solid var(--rule);
  font-size: 1.14rem;
  line-height: 1.2;
  color: var(--ink);
}
.eq { display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; }
.eq-body { white-space: nowrap; }
.eq-body b { font-weight: 600; }
.eq-body sub, .eq-body sup { font-size: .66em; line-height: 0; }
.eq-num { font-family: var(--sans); font-size: .72rem; font-variant-numeric: tabular-nums lining-nums; color: var(--ink-2); }
.frac {
  display: inline-flex;
  flex-direction: column;
  align-items: stretch;
  margin: 0 .1em;
  font-size: .9em;
  line-height: 1.15;
  text-align: center;
  vertical-align: middle;
}
.frac > span:first-child { padding: 0 .2em .1em; border-bottom: 1px solid currentColor; }
.frac > span:last-child { padding: .1em .2em 0; }

/* ---------- app list ---------- */

.apps { margin: 0; padding: 0; list-style: none; }
.app + .app { border-top: 1px solid var(--rule); }

.app-link {
  display: grid;
  grid-template-columns: 3.5rem minmax(0, 1fr) auto 1.1rem;
  align-items: center;
  column-gap: 1.35rem;
  padding-block: 1.2rem;
  text-decoration: none;
}
.apps > .app:first-child .app-link { padding-top: 0; }
.apps > .app[hidden] + .app, .apps > .app:first-child[hidden] ~ .app { border-top: 0; }

.icon { position: relative; display: grid; place-items: center; width: 3.5rem; aspect-ratio: 1; }
.icon img { width: 100%; height: 100%; object-fit: contain; transition: transform .5s var(--ease); }
.icon--ios img, .icon--watch img {
  width: 80%;
  height: 80%;
  box-shadow: 0 .5px 1px rgb(0 0 0 / .14), 0 8px 18px -8px var(--shadow);
}
.icon--ios img { border-radius: 22.5%; }
.icon--watch img { border-radius: 50%; }

.app-name {
  display: block;
  font-size: 1.36rem;
  font-weight: 450;
  line-height: 1.2;
  letter-spacing: -.012em;
}
.app-tagline {
  display: block;
  margin-top: .2rem;
  font-size: 1.02rem;
  line-height: 1.45;
  color: var(--ink-2);
}

.app-meta {
  display: grid;
  justify-items: end;
  gap: .3rem;
  font-family: var(--sans);
  font-size: .76rem;
  color: var(--ink-2);
  white-space: nowrap;
}

.status { display: inline-flex; align-items: center; gap: .5em; }
.status::before {
  content: "";
  width: .42em; height: .42em;
  border-radius: 50%;
  background: var(--ink);
}
.status--beta::before { background: var(--accent); }
.status--experimental::before { background: transparent; box-shadow: inset 0 0 0 1px var(--ink-2); }

.app-go { color: var(--accent); opacity: 0; transform: translateX(-6px); transition: opacity .35s var(--ease), transform .35s var(--ease); }
.app-go svg { width: 1.1rem; height: 1.1rem; }

.app-link:hover .icon img { transform: translateY(-3px); }
.app-link:hover .app-go, .app-link:focus-visible .app-go { opacity: 1; transform: none; }
.app-link:hover .app-name {
  text-decoration: underline 1px var(--accent);
  text-underline-offset: .2em;
}

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: .2rem 1.6rem;
  margin-top: 2rem;
  font-family: var(--sans);
  font-size: .86rem;
}
.filter {
  position: relative;
  padding: .35rem 0;
  border: 0;
  background: none;
  color: var(--ink-2);
  font: inherit;
  cursor: pointer;
}
.filter:hover { color: var(--ink); }
.filter[aria-pressed="true"] { color: var(--ink); }
.filter[aria-pressed="true"]::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 1px;
  background: var(--accent);
}
.count {
  margin-left: .3em;
  font-family: var(--mono);
  font-size: .68em;
  vertical-align: .45em;
  color: var(--ink-2);
}

/* ---------- app page ---------- */

.app-hero {
  display: grid;
  grid-template-columns: var(--margin) minmax(0, 1fr);
  column-gap: var(--gutter);
  padding-top: clamp(3.5rem, 9vw, 7rem);
}
.app-hero-icon {
  justify-self: end;
  width: clamp(5.5rem, 9vw, 7.75rem);
  margin-top: 2.1rem;
}
.app-hero-text { min-width: 0; }

.downloads {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 1.1rem 1.25rem;
  margin-top: 2.25rem;
}
.dl { display: grid; justify-items: start; gap: .5rem; }
.dl-note {
  padding-left: 1.3rem;
  font-family: var(--sans);
  font-size: .74rem;
  color: var(--ink-2);
}

.button {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  padding: .75rem 1.3rem;
  border: 1px solid var(--ink);
  border-radius: 999px;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--sans);
  font-size: .88rem;
  font-weight: 500;
  line-height: 1.2;
  text-decoration: none;
  transition: background-color .25s var(--ease), border-color .25s var(--ease), color .25s var(--ease), transform .2s var(--ease);
}
.button svg { width: 1em; height: 1em; }
.button:hover { border-color: var(--accent); background: var(--accent); color: var(--on-accent); }
.button:active { transform: translateY(1px); }
.button--ghost { border-color: var(--rule-2); background: transparent; color: var(--ink); }
.button--ghost:hover { border-color: var(--accent); background: transparent; color: var(--accent); }
.button--soon, .button--soon:hover {
  border: 1px dashed var(--rule-2);
  background: transparent;
  color: var(--ink-2);
  cursor: default;
  transform: none;
}

.release-meta { margin: 1.25rem 0 0; font-family: var(--sans); font-size: .76rem; color: var(--ink-2); }
.release-meta:empty { display: none; }

.shots-row {
  display: grid;
  grid-template-columns: var(--margin) minmax(0, 1fr);
  column-gap: var(--gutter);
  margin-top: clamp(3rem, 7vw, 5rem);
}
.shots {
  grid-column: 2;
  display: flex;
  gap: clamp(1rem, 2.5vw, 1.75rem);
  padding: .75rem 1rem 2.75rem;
  margin-inline: -1rem;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scrollbar-width: thin;
}
.shots img {
  flex: none;
  width: auto;
  height: clamp(220px, 30vw, 330px);
  border-radius: 2.2rem;
  background: #000;
  box-shadow: 0 1px 2px rgb(0 0 0 / .18), 0 18px 28px -18px var(--shadow);
  scroll-snap-align: start;
  scroll-margin-left: 1rem;
}

.details {
  align-self: start;
  position: sticky;
  top: 2rem;
  display: grid;
  gap: 1.15rem;
  margin: 0;
  padding-top: .3rem;
  font-family: var(--sans);
}
.details dt {
  margin-bottom: .25rem;
  font-size: .68rem;
  font-weight: 500;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ink-2);
}
.details dd { margin: 0; font-size: .86rem; line-height: 1.45; }

.subhead {
  margin: 3.25rem 0 1.1rem;
  font-size: 1.6rem;
  line-height: 1.2;
  letter-spacing: -.014em;
}

.features { margin: 0; padding: 0; list-style: none; max-width: var(--measure); }
.features li {
  position: relative;
  padding: .75rem 0 .75rem 1.75rem;
  border-top: 1px solid var(--rule);
  font-size: 1.08rem;
  line-height: 1.55;
}
.features li:last-child { border-bottom: 1px solid var(--rule); }
.features li::before {
  content: "";
  position: absolute;
  left: 0;
  top: calc(.75rem + .775em);
  width: .8rem;
  height: 1px;
  background: var(--accent);
}
.features code { font-size: .8em; padding: .1em .35em; border-radius: 4px; background: var(--paper-2); }

.feedback { margin: 2.5rem 0 0; font-family: var(--sans); font-size: .86rem; color: var(--ink-2); }

.empty { margin: 0; font-size: 1.05rem; font-style: italic; color: var(--ink-2); }

/* ---------- prose ---------- */

.prose { max-width: var(--measure); font-size: 1.16rem; line-height: 1.66; }
.prose > :first-child { margin-top: 0; }
.prose p { margin: 0 0 1.1em; }
.prose h2 { margin: 2.75rem 0 1rem; font-size: 1.6rem; line-height: 1.2; letter-spacing: -.014em; }
.prose h3 { margin: 2.25rem 0 .75rem; font-size: 1.28rem; line-height: 1.25; }
.prose ul, .prose ol { margin: 0 0 1.2em; padding-left: 1.3rem; }
.prose li { margin-bottom: .45em; padding-left: .3rem; }
.prose li::marker { color: var(--ink-2); }
.prose strong { font-weight: 600; }
.prose code { padding: .12em .38em; border-radius: 4px; background: var(--paper-2); font-size: .8em; }
.prose pre {
  margin: 1.5rem 0;
  padding: 1rem 1.2rem;
  border-radius: 6px;
  background: var(--paper-2);
  overflow-x: auto;
  font-size: .8rem;
  line-height: 1.6;
}
.prose pre code { padding: 0; background: none; font-size: inherit; }
.prose blockquote {
  margin: 1.75rem 0;
  padding-left: 1.25rem;
  border-left: 2px solid var(--accent);
  font-style: italic;
  color: var(--ink-2);
}
.prose hr { height: 1px; margin: 2.75rem 0; border: 0; background: var(--rule); }

/* ---------- about ---------- */

.facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.75rem 2.25rem;
  margin: 2.75rem 0 0;
  padding-top: 1.5rem;
  border-top: 1px solid var(--rule);
  font-family: var(--sans);
}
.facts dt {
  margin-bottom: .6rem;
  font-size: .68rem;
  font-weight: 500;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ink-2);
}
.facts dd { margin: 0; font-size: .86rem; line-height: 1.6; }
.facts ul { margin: 0; padding: 0; list-style: none; }
.facts li + li { margin-top: .3rem; }

/* ---------- papers ---------- */

.papers { margin: 0; padding: 0; list-style: none; }
.paper {
  display: grid;
  grid-template-columns: 3.5rem minmax(0, 1fr);
  column-gap: 1.35rem;
  padding-block: 1.6rem;
  scroll-margin-top: 2rem;
}
.paper + .paper { border-top: 1px solid var(--rule); }
.papers > .paper:first-child { padding-top: 0; }

.paper-year {
  padding-top: .38rem;
  font-family: var(--sans);
  font-size: .8rem;
  font-variant-numeric: tabular-nums lining-nums;
  color: var(--ink-2);
}
.paper-main { min-width: 0; max-width: 40rem; }
.paper-title {
  margin-bottom: .5rem;
  font-size: 1.3rem;
  font-weight: 450;
  line-height: 1.28;
  letter-spacing: -.01em;
}
.paper-authors {
  margin: 0 0 .25rem;
  font-family: var(--sans);
  font-size: .84rem;
  line-height: 1.55;
  color: var(--ink-2);
}
.paper-authors .me { color: var(--ink); font-weight: 500; }
.paper-venue { margin: 0; font-size: 1rem; font-style: italic; color: var(--ink-2); }
.paper-state {
  margin-right: .8em;
  font-family: var(--sans);
  font-size: .66rem;
  font-style: normal;
  font-weight: 500;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--accent);
}

.paper-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .3rem 1.4rem;
  margin: .9rem 0 0;
}
.action {
  display: inline-flex;
  align-items: center;
  gap: .4em;
  padding: 0;
  border: 0;
  background: none;
  color: var(--ink-2);
  font-family: var(--sans);
  font-size: .7rem;
  font-weight: 500;
  line-height: 1.6;
  letter-spacing: .11em;
  text-transform: uppercase;
  text-decoration: none;
  cursor: pointer;
}
.action:hover { color: var(--accent); }
.action[aria-expanded="true"] { color: var(--ink); }
.action svg { width: .9em; height: .9em; transition: transform .3s var(--ease); }
.action[aria-expanded="true"] svg { transform: rotate(180deg); }

.panel { margin-top: 1rem; }
.panel:not([hidden]) { animation: panel-in .45s var(--ease); }
@keyframes panel-in { from { opacity: 0; transform: translateY(-4px); } }
.panel p { margin: 0; font-size: 1.02rem; line-height: 1.6; color: var(--ink-2); }
.panel pre {
  margin: 0 0 .75rem;
  padding: 1rem 1.2rem;
  border-radius: 6px;
  background: var(--paper-2);
  overflow-x: auto;
  font-size: .76rem;
  line-height: 1.65;
}

/* ---------- cv ---------- */

.cv-item { padding-block: 1.3rem; }
.cv-item + .cv-item { border-top: 1px solid var(--rule); }
.cv > .cv-item:first-child { padding-top: 0; }
.cv-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: .2rem 1.5rem;
}
.cv-title { font-size: 1.24rem; font-weight: 450; line-height: 1.3; letter-spacing: -.008em; }
.cv-period {
  font-family: var(--sans);
  font-size: .8rem;
  font-variant-numeric: tabular-nums lining-nums;
  color: var(--ink-2);
  white-space: nowrap;
}
.cv-org { margin: .25rem 0 0; font-family: var(--sans); font-size: .84rem; color: var(--ink-2); }
.cv-detail { max-width: var(--measure); margin: .6rem 0 0; font-size: 1.04rem; line-height: 1.6; }

/* ---------- notes ---------- */

.notes-list { margin: 0; padding: 0; list-style: none; }
.note-row + .note-row { border-top: 1px solid var(--rule); }
.note-row a {
  display: grid;
  grid-template-columns: 9rem minmax(0, 1fr);
  column-gap: 1.35rem;
  padding-block: 1.35rem;
  text-decoration: none;
}
.notes-list > .note-row:first-child a { padding-top: 0; }
.note-date {
  padding-top: .38rem;
  font-family: var(--sans);
  font-size: .8rem;
  font-variant-numeric: tabular-nums lining-nums;
  color: var(--ink-2);
}
.note-title { display: block; font-size: 1.36rem; font-weight: 450; line-height: 1.25; letter-spacing: -.01em; }
.note-summary { display: block; margin-top: .3rem; color: var(--ink-2); }
.note-row a:hover .note-title { text-decoration: underline 1px var(--accent); text-underline-offset: .2em; }

/* ---------- search ---------- */

.search-input {
  width: 100%;
  margin-top: .5rem;
  padding: .4rem 0 .8rem;
  border: 0;
  border-bottom: 1px solid var(--rule-2);
  border-radius: 0;
  background: transparent;
  color: var(--ink);
  font-family: var(--serif);
  font-size: clamp(1.6rem, 3.6vw, 2.2rem);
  font-weight: 360;
  letter-spacing: -.012em;
  outline: none;
  -webkit-appearance: none;
  appearance: none;
  transition: border-color .25s var(--ease), box-shadow .25s var(--ease);
}
.search-input::placeholder { color: var(--ink-3); }
.search-input:focus { border-bottom-color: var(--accent); box-shadow: 0 1px 0 var(--accent); }
.search-input::-webkit-search-cancel-button { -webkit-appearance: none; appearance: none; }

.results { margin: 2.25rem 0 0; padding: 0; list-style: none; }
.result + .result { border-top: 1px solid var(--rule); }
.result a {
  display: grid;
  grid-template-columns: 4.5rem minmax(0, 1fr);
  column-gap: 1.35rem;
  padding-block: 1.1rem;
  text-decoration: none;
}
.result-kind {
  padding-top: .35rem;
  font-family: var(--sans);
  font-size: .66rem;
  font-weight: 500;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--ink-2);
}
.result-title { display: block; font-size: 1.22rem; font-weight: 450; line-height: 1.3; }
.result-desc { display: block; margin-top: .15rem; font-size: 1rem; color: var(--ink-2); }
.result a:hover .result-title { text-decoration: underline 1px var(--accent); text-underline-offset: .2em; }
.results-empty { padding-block: 1rem; font-style: italic; color: var(--ink-2); }

/* ---------- colophon ---------- */

.colophon { margin-top: clamp(6rem, 13vw, 10rem); border-top: 1px solid var(--rule); }
.colophon-grid {
  display: grid;
  grid-template-columns: var(--margin) minmax(0, 1fr);
  column-gap: var(--gutter);
  padding-block: 2.5rem 3.5rem;
}
.colophon-name { margin: 0; font-size: 1.05rem; font-weight: 500; letter-spacing: -.01em; }
.colophon .links { margin: 0 0 1rem; }
.colophon-note {
  max-width: 40rem;
  margin: 0;
  font-family: var(--sans);
  font-size: .76rem;
  line-height: 1.65;
  color: var(--ink-2);
}

/* ---------- motion ---------- */

.reveal { animation: rise 1s var(--ease) both; animation-delay: calc(var(--d, 0) * 90ms + 60ms); }
@keyframes rise { from { opacity: 0; transform: translateY(12px); } }

@media (prefers-reduced-motion: reduce) {
  .reveal, .panel:not([hidden]) { animation: none; }
  body, a, .button, .icon img, .app-go { transition: none; }
}

/* ---------- responsive ---------- */

@media (max-width: 62rem) {
  .head-body, .sec, .app-hero, .shots-row, .colophon-grid, .figure figcaption { grid-template-columns: minmax(0, 1fr); }
  .head-body > *, .figure-text, .shots { grid-column: 1; }
  .sec-label { margin-bottom: 1.6rem; padding-top: 0; }
  .app-hero-icon { justify-self: start; width: 6.5rem; margin: 0 0 1.75rem -.4rem; }
  .app-body .details {
    position: static;
    order: 2;
    grid-template-columns: repeat(auto-fill, minmax(9.5rem, 1fr));
    margin-top: 3rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--rule);
  }
  .colophon-grid { row-gap: 1rem; }
  .facts { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 44rem) {
  .masthead {
    grid-template-columns: 1fr auto;
    grid-template-areas: "mark tools" "nav nav";
    row-gap: .5rem;
    padding-block: 1.1rem .4rem;
  }
  .wordmark { grid-area: mark; }
  .tools { grid-area: tools; }
  .nav { grid-area: nav; }

  .app-link { grid-template-columns: 3rem minmax(0, 1fr); column-gap: 1.1rem; align-items: start; }
  .icon { width: 3rem; }
  .app-meta { grid-column: 2; grid-auto-flow: column; justify-content: start; justify-items: start; gap: 1.1rem; margin-top: .55rem; }
  .app-go { display: none; }

  .paper { grid-template-columns: minmax(0, 1fr); }
  .paper-year { padding: 0 0 .3rem; }
  .note-row a, .result a { grid-template-columns: minmax(0, 1fr); row-gap: .2rem; }
  .note-date, .result-kind { padding-top: 0; }
  .facts { grid-template-columns: minmax(0, 1fr); }
  .figure-text p { font-size: .88rem; }
  .equations { font-size: 1rem; gap: .85rem; }
  .eq { gap: 1rem; }
  .eq-body { overflow-x: auto; }
}

@media print {
  body::before, .masthead, .figure, .colophon .links, .filters, .paper-actions, .skip { display: none; }
  body { background: #fff; color: #000; }
  .reveal { animation: none; }
  a { text-decoration: none; }
}

/* ==========================================================================
   Redesign layer: reading faces, labels in sentence case, and the new
   components (home hero, flow controls, tiles, CV explorer).
   ========================================================================== */

.prose, .paper-title, .figure-text p, .equations, .app-tagline, .note-summary, .result-desc,
.cv-entry-summary, .cv-entry-points, .hero-lede, .sec-lede, .panel p, .feedback, .outside, .theory p {
  font-family: var(--serif);
}
.prose { font-size: 1.12rem; line-height: 1.62; }
.fig-num, .result-kind, .note-date, .paper-year, .status, .app-meta, .dl-note, .details dt, .facts dt {
  text-transform: none;
  letter-spacing: 0;
}
.fig-num { font-size: .82rem; font-weight: 600; }
.result-kind { font-size: .8rem; }
.count { font-family: var(--sans); font-size: .72em; font-variant-numeric: tabular-nums; }
.paper-title { font-weight: 500; }
.app-name { font-weight: 600; letter-spacing: -.015em; }
.button { border-radius: 999px; }

/* ---------- home: the flow stage ---------- */

.flow-stage { position: fixed; inset: 0; z-index: -1; pointer-events: none; }
.flow { display: block; width: 100%; height: 100%; }
.no-webgl .flow-stage {
  background:
    radial-gradient(120% 70% at 20% 110%, color-mix(in srgb, var(--cold) 30%, transparent), transparent 60%),
    radial-gradient(90% 60% at 85% 0%, color-mix(in srgb, var(--warm) 18%, transparent), transparent 60%),
    var(--paper);
}
.no-webgl .flow { display: none; }

.flow-axis { position: absolute; inset: 0; opacity: 0; transition: opacity 1.2s var(--ease) .4s; }
.has-flow .flow-axis { opacity: 1; }
.flow-axis span {
  position: absolute;
  left: 0; top: 0;
  margin: -.62em 0 0 -.55rem;
  translate: -100% 0;
  font-size: .7rem;
  font-variant-numeric: tabular-nums;
  color: var(--ink-2);
  white-space: nowrap;
  will-change: transform;
}

.hero {
  display: grid;
  grid-template-rows: 1fr auto;
  min-height: 100svh;
  padding-top: 5.5rem;
  padding-bottom: clamp(1.5rem, 4vh, 3rem);
}
.hero-name {
  align-self: end;
  margin: 0 0 0 -.05em;
  font-size: clamp(4.4rem, 17vw, 15.5rem);
  font-weight: 650;
  font-stretch: 75%;
  line-height: .82;
  letter-spacing: -.035em;
  animation: hero-in 1.4s var(--ease) both .15s;
}
.hero-name span { display: block; }
.hero-name span + span { margin-left: .42em; }
@keyframes hero-in { from { opacity: 0; letter-spacing: .02em; filter: blur(8px); } }

.hero-foot {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(18rem, 23rem);
  align-items: end;
  gap: 2rem clamp(2rem, 6vw, 6rem);
  margin-top: clamp(1.5rem, 4vh, 2.75rem);
}
.hero-lede {
  max-width: 31em;
  margin: 0;
  font-size: clamp(1.15rem, 1.9vw, 1.45rem);
  line-height: 1.42;
  text-shadow: 0 0 22px var(--paper), 0 0 2px var(--paper);
}
.hero-text .links { margin-top: 1.25rem; }

.flow-panel {
  display: grid;
  gap: .95rem;
  padding: 1.1rem 1.15rem 1rem;
  border: 1px solid color-mix(in srgb, var(--ink) 14%, transparent);
  border-radius: var(--radius);
  background: var(--glass);
  -webkit-backdrop-filter: blur(16px) saturate(1.25);
  backdrop-filter: blur(16px) saturate(1.25);
  font-size: .84rem;
  color: var(--ink);
}
.flow-title { margin: 0; font-weight: 600; font-size: .92rem; }
.seg { display: grid; grid-template-columns: 1fr 1fr; gap: .25rem; margin: 0; padding: .2rem; border: 1px solid var(--rule); border-radius: 999px; }
.seg legend { float: left; width: 100%; grid-column: 1 / -1; margin: 0 0 .35rem; padding: 0; color: var(--ink-2); }
.seg label { position: relative; display: block; cursor: pointer; }
.seg input { position: absolute; opacity: 0; inset: 0; margin: 0; cursor: pointer; }
.seg span {
  display: block;
  padding: .38rem .6rem;
  border-radius: 999px;
  text-align: center;
  color: var(--ink-2);
  transition: background-color .25s var(--ease), color .25s var(--ease);
}
.seg input:checked + span { background: var(--ink); color: var(--paper); }
.seg input:focus-visible + span { outline: 2px solid var(--warm); outline-offset: 2px; }
.seg:has(legend) { border: 0; padding: 0; }
.seg:has(legend) label:first-of-type span, .seg:has(legend) label:last-of-type span { border: 1px solid var(--rule); }

.range { display: grid; gap: .35rem; }
.range-label { color: var(--ink-2); }
.range output { color: var(--ink); font-weight: 600; font-variant-numeric: tabular-nums; }
.range input { width: 100%; margin: 0; accent-color: var(--warm); }
.range-ticks { display: flex; justify-content: space-between; font-size: .72rem; color: var(--ink-3); font-variant-numeric: tabular-nums; }

.theta { display: grid; gap: .35rem; }
.theta-bar { height: 6px; border-radius: 6px; background: var(--theta); }
.theta-ends { display: flex; justify-content: space-between; gap: .5rem; font-size: .72rem; color: var(--ink-2); }
.theta-ends i { font-family: var(--serif); font-size: 1.1em; }

.flow-how summary { cursor: pointer; color: var(--ink-2); width: max-content; }
.flow-how summary:hover { color: var(--ink); }
.flow-how p { margin: .7rem 0 0; font-family: var(--serif); font-size: .92rem; line-height: 1.5; color: var(--ink-2); }
.flow-how pre {
  max-height: 15rem;
  margin: .8rem 0 0;
  padding: .8rem;
  overflow: auto;
  border-radius: 8px;
  background: color-mix(in srgb, var(--paper) 80%, transparent);
  font-size: .68rem;
  line-height: 1.5;
  color: var(--ink-2);
}

/* Everything after the hero sits on a veil, so the flow stays faintly visible behind the reading. */
.after { position: relative; z-index: 0; padding-bottom: 1px; }
.after::before {
  content: "";
  position: absolute;
  inset: 0 calc(50% - 50vw);
  z-index: -1;
  background: linear-gradient(to bottom, transparent, var(--veil) 9rem);
}
.after > .sec:first-child { margin-top: 3rem; }
.home .colophon { margin-top: 0; padding-top: clamp(4rem, 9vw, 7rem); background: var(--veil); }

.prose--lead { font-size: clamp(1.2rem, 1.9vw, 1.42rem); line-height: 1.5; max-width: 34em; }
.sec-lede { max-width: 34em; margin: 0 0 2rem; font-size: 1.2rem; line-height: 1.5; color: var(--ink-2); }


/* ---------- home: app tiles ---------- */

.tiles {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(15rem, 1fr));
  gap: 1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.tile { perspective: 900px; }
.tile-link {
  display: grid;
  grid-template-rows: auto auto 1fr auto;
  gap: .35rem;
  height: 100%;
  padding: 1.35rem 1.35rem 1.2rem;
  border: 1px solid var(--rule);
  border-radius: 18px;
  background: color-mix(in srgb, var(--paper-2) 55%, transparent);
  text-decoration: none;
  transform: rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg));
  transform-style: preserve-3d;
  transition: transform .5s var(--ease), border-color .3s var(--ease), background-color .3s var(--ease);
}
.tile-link.is-tilting { transition: border-color .3s var(--ease), background-color .3s var(--ease); }
.tile-link:hover { border-color: var(--rule-2); background: color-mix(in srgb, var(--paper-2) 85%, transparent); }
.tile .icon { width: 3.75rem; margin-bottom: .8rem; transform: translateZ(28px); }
.tile-name { font-size: 1.3rem; font-weight: 600; letter-spacing: -.015em; transform: translateZ(16px); }
.tile-tag { font-family: var(--serif); font-size: 1.02rem; line-height: 1.45; color: var(--ink-2); }
.tile-meta { margin-top: .8rem; font-size: .8rem; color: var(--ink-3); }

/* ---------- CV ---------- */

[data-kind="education"] { --kc: var(--k-edu); }
[data-kind="research"] { --kc: var(--k-res); }
[data-kind="industry"] { --kc: var(--k-ind); }
[data-kind="teaching"] { --kc: var(--k-tea); }

.cv-explorer { display: grid; gap: 1.25rem; margin-top: clamp(2.5rem, 5vw, 3.5rem); }
.cv-toolbar { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: .75rem 2rem; }
.cv-toolbar .filters { margin: 0; font-family: var(--sans); font-size: .9rem; }
.cv-toolbar .filter[aria-pressed="true"]::after { height: 2px; background: var(--kc, var(--theta)); }
.cv-search {
  display: flex;
  align-items: center;
  gap: .5rem;
  min-width: min(100%, 16rem);
  padding: .45rem .9rem;
  border: 1px solid var(--rule);
  border-radius: 999px;
  color: var(--ink-2);
}
.cv-search:focus-within { border-color: var(--rule-2); }
.cv-search svg { width: 1rem; height: 1rem; flex: none; }
.cv-search input { flex: 1; min-width: 0; border: 0; background: none; color: var(--ink); font: inherit; font-size: .9rem; outline: none; }

.timeline {
  --bar-h: 1.9rem;
  --bar-gap: .35rem;
  --lane-gap: .7rem;
  overflow-x: auto;
  padding: 1rem 1rem .9rem;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--paper-2) 45%, transparent);
  scrollbar-width: thin;
}
.tl-inner { display: grid; grid-template-columns: 6.5rem minmax(0, 1fr); min-width: 760px; }
.tl-names, .tl-plot { display: grid; align-content: start; row-gap: var(--lane-gap); }
.tl-plot { position: relative; }
.tl-years-gap, .tl-years { height: 1.3rem; }
.tl-years { position: relative; border-bottom: 1px solid var(--rule); }
.tl-year {
  position: absolute;
  left: var(--a);
  bottom: .3rem;
  translate: -50% 0;
  font-size: .72rem;
  font-variant-numeric: tabular-nums;
  color: var(--ink-3);
}
.tl-year:first-child { translate: 0 0; }
.tl-year:last-child { translate: -100% 0; }
.tl-name {
  display: flex;
  align-items: center;
  gap: .5rem;
  height: calc(var(--rows) * var(--bar-h) + (var(--rows) - 1) * var(--bar-gap));
  font-size: .8rem;
  font-weight: 600;
  color: var(--ink-2);
}
.tl-name::before { content: ""; width: .5rem; height: .5rem; border-radius: 50%; background: var(--kc); }
.tl-lane { position: relative; height: calc(var(--rows) * var(--bar-h) + (var(--rows) - 1) * var(--bar-gap)); }
.tl-bar {
  position: absolute;
  left: var(--a);
  width: max(var(--w), .7rem);
  top: calc(var(--row) * (var(--bar-h) + var(--bar-gap)));
  height: var(--bar-h);
  padding: 0;
  overflow: hidden;
  border: 0;
  border-left: 2px solid var(--kc);
  border-radius: 4px 7px 7px 4px;
  background: color-mix(in srgb, var(--kc) 22%, transparent);
  color: var(--ink);
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: background-color .25s var(--ease), opacity .25s var(--ease), box-shadow .25s var(--ease);
}
.tl-bar:hover { background: color-mix(in srgb, var(--kc) 36%, transparent); }
.tl-bar[aria-pressed="true"] { background: var(--kc); color: var(--paper); }
.tl-bar.is-lit { box-shadow: inset 0 0 0 2px var(--kc); }
.tl-bar.is-dim { opacity: .22; }
.tl-bar--open-start { border-left: 0; -webkit-mask-image: linear-gradient(90deg, transparent, #000 2.2rem); mask-image: linear-gradient(90deg, transparent, #000 2.2rem); }
.tl-bar--open-end { -webkit-mask-image: linear-gradient(90deg, #000 calc(100% - 1.8rem), transparent); mask-image: linear-gradient(90deg, #000 calc(100% - 1.8rem), transparent); }
.tl-bar--open-start .tl-text { padding-left: 1.6rem; }
.tl-bar--terms { background: transparent; border-left-color: transparent; box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--kc) 35%, transparent); }
.tl-bar--terms i { position: absolute; top: 0; bottom: 0; left: var(--a); width: var(--w); background: color-mix(in srgb, var(--kc) 40%, transparent); }
.tl-bar--terms[aria-pressed="true"] { background: color-mix(in srgb, var(--kc) 25%, transparent); }
.tl-bar--terms[aria-pressed="true"] i { background: var(--kc); }
.tl-text {
  position: relative;
  display: block;
  padding: 0 .55rem;
  overflow: hidden;
  font-size: .74rem;
  font-weight: 500;
  line-height: var(--bar-h);
  white-space: nowrap;
  text-overflow: ellipsis;
}
.tl-bar--terms .tl-text { color: var(--ink-2); }
.tl-now { position: absolute; top: 1.3rem; bottom: -.9rem; left: var(--a); border-left: 1px dashed var(--warm); pointer-events: none; }
.tl-now span { position: absolute; bottom: -.15rem; right: .3rem; font-size: .68rem; font-weight: 600; line-height: 1; color: var(--warm); }
.timeline { padding-bottom: 1.4rem; }

.cv-stage {
  display: grid;
  grid-template-columns: minmax(13rem, 21rem) minmax(0, 1fr);
  gap: clamp(1rem, 3vw, 2.5rem);
  align-items: start;
}
.globe { margin: 0; }
.globe canvas { display: block; width: 100%; aspect-ratio: 1; cursor: grab; touch-action: none; }
.globe canvas:active { cursor: grabbing; }
.globe figcaption { margin-top: .3rem; text-align: center; font-size: .82rem; color: var(--ink-2); }
.cv-focus {
  min-height: 100%;
  padding: clamp(1.1rem, 3vw, 1.75rem);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--paper-2) 45%, transparent);
}
.cv-focus .cv-entry { padding: 0; border: 0; }
.cv-focus .cv-entry-title { font-size: clamp(1.35rem, 2.6vw, 1.85rem); font-stretch: 85%; }

.skillbar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr));
  gap: 1rem 1.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--rule);
}
.skillbar-hint { grid-column: 1 / -1; margin: 0; font-size: .86rem; color: var(--ink-2); }
.skill-group h3 { margin-bottom: .5rem; font-size: .8rem; font-weight: 600; color: var(--ink-2); }
.skill-group ul, .cv-entry-skills { display: flex; flex-wrap: wrap; gap: .35rem; margin: 0; padding: 0; list-style: none; }
.skill {
  display: inline-block;
  padding: .28rem .7rem;
  border: 1px solid var(--rule-2);
  border-radius: 999px;
  background: none;
  color: var(--ink);
  font: inherit;
  font-size: .78rem;
  line-height: 1.3;
  cursor: pointer;
  transition: background-color .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease);
}
button.skill:hover { border-color: var(--warm); }
.skill[aria-pressed="true"] { background: var(--warm); border-color: var(--warm); color: var(--on-accent); }
.skill--static { border-style: dashed; border-color: var(--rule); color: var(--ink-3); cursor: default; }
.cv-empty { margin: 0; font-family: var(--serif); font-style: italic; color: var(--ink-2); }

.cv-entry { padding-block: 1.6rem; border-top: 1px solid var(--rule); transition: opacity .25s var(--ease); }
.cv-list > .cv-entry:first-child, .cv-list > .cv-entry[hidden] + .cv-entry { border-top: 0; padding-top: 0; }
.cv-entry.is-dim { opacity: .4; }
.cv-entry.is-lit { box-shadow: inset 3px 0 var(--warm); padding-left: 1.1rem; }
.cv-entry-head { display: grid; grid-template-columns: minmax(0, 1fr) auto; column-gap: 1.5rem; align-items: baseline; }
.cv-entry-kind {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  gap: .45rem;
  margin: 0 0 .35rem;
  font-size: .78rem;
  color: var(--ink-2);
}
.cv-entry-kind::before { content: ""; width: .5rem; height: .5rem; border-radius: 50%; background: var(--kc); }
.cv-entry-title { font-size: 1.28rem; line-height: 1.2; letter-spacing: -.015em; }
.cv-entry-dates { margin: 0; font-size: .86rem; font-variant-numeric: tabular-nums; color: var(--ink-2); white-space: nowrap; }
.cv-entry-org { margin: .3rem 0 0; font-size: .95rem; color: var(--ink-2); }
.cv-entry-place { display: block; font-size: .82rem; color: var(--ink-3); }
.cv-entry-summary { margin: .85rem 0 0; font-size: 1.08rem; line-height: 1.5; max-width: var(--measure); }
.cv-entry-points { margin: .6rem 0 0; padding-left: 1.1rem; font-size: 1.04rem; line-height: 1.5; max-width: var(--measure); color: var(--ink-2); }
.cv-entry-points li + li { margin-top: .3rem; }
.cv-entry-points li::marker { color: var(--kc); }
.cv-entry-skills { margin-top: .9rem; }
.cv-entry-links { display: flex; flex-wrap: wrap; gap: .3rem 1.25rem; margin: .9rem 0 0; font-size: .88rem; }

.rows { margin: 0; padding: 0; list-style: none; }
.rows li { display: flex; flex-wrap: wrap; justify-content: space-between; gap: .2rem 1.5rem; padding-block: .75rem; border-top: 1px solid var(--rule); font-family: var(--serif); font-size: 1.06rem; }
.rows li:first-child { border-top: 0; padding-top: 0; }
.rows-end { font-family: var(--sans); font-size: .86rem; color: var(--ink-2); font-variant-numeric: tabular-nums; }
.interest-list { columns: 2 16rem; column-gap: 2rem; margin: 0; padding-left: 1.1rem; font-family: var(--serif); font-size: 1.06rem; line-height: 1.6; }
.outside { margin-top: 1rem; color: var(--ink-2); }

/* ---------- motion and small screens for the new layer ---------- */

@media (prefers-reduced-motion: reduce) {
  .hero-name { animation: none; }
  .tile-link { transition: none; transform: none; }
  .flow-axis { transition: none; }
}

@media (max-width: 62rem) {
  .hero-foot { grid-template-columns: minmax(0, 1fr); }
  .flow-panel { max-width: 26rem; }
  .flow-axis { display: none; }
  .sec-label, .sec-title { position: static; margin-bottom: 1.4rem; }
  .cv-stage { grid-template-columns: minmax(0, 1fr); }
  .globe { max-width: 17rem; margin-inline: auto; }
}

@media (max-width: 44rem) {
  .hero { padding-top: 7rem; }
  .hero-name span + span { margin-left: 0; }
  .hero-name { font-size: 24vw; }
  .cv-entry-head { grid-template-columns: minmax(0, 1fr); }
  .cv-entry-dates { margin-top: .25rem; }
}

@media print {
  .top, .flow-stage, .flow-panel, .cv-explorer, .cv-entry-skills { display: none !important; }
  .after::before { display: none; }
  .hero { min-height: 0; }
}
.home.scrolled .flow-axis { opacity: 0; transition-delay: 0s; transition-duration: .4s; }
.tl-names { position: sticky; left: -1rem; z-index: 2; margin-left: -1rem; padding-left: 1rem; background: linear-gradient(90deg, color-mix(in srgb, var(--paper-2) 45%, var(--paper)) 88%, transparent); }

.rad { padding: .05em .1em 0; border-top: 1px solid currentColor; }
.figure-text p + p { margin-top: .4rem; }

/* Hero controls: three-way atmosphere switch and a scaled wind slider. */
.seg--3 { grid-template-columns: repeat(3, 1fr); }
.seg--3 span { padding-inline: .3rem; font-size: .8rem; }
.range-ticks--scale { position: relative; display: block; height: 1em; margin-inline: 8px; }
.range-ticks--scale span { position: absolute; left: var(--at); translate: -50% 0; }

/* Atmosphere chosen on the home page: the page background takes on its colours too.
   Stable (clear night) uses the base tokens; neutral is overcast slate, unstable a sunny-day blue. */
:root[data-atmosphere="neutral"] { --paper: #e3e6e9; --paper-2: #d6dadf; --rule: #c3c9d0; --rule-2: #a5aeb8; --veil: rgb(227 230 233 / .9); --glass: rgb(232 235 238 / .66); }
:root[data-atmosphere="neutral"][data-theme="dark"] { --paper: #181d24; --paper-2: #232a33; --rule: #2c343f; --rule-2: #3c4652; --veil: rgb(24 29 36 / .88); --glass: rgb(24 29 36 / .55); }
:root[data-atmosphere="convective"] { --paper: #e8f3fb; --paper-2: #d3e7f6; --rule: #bcd5ea; --rule-2: #94b8d6; --veil: rgb(232 243 251 / .88); --glass: rgb(238 247 253 / .62); }
:root[data-atmosphere="convective"][data-theme="dark"] { --paper: #0e2b45; --paper-2: #163b5c; --rule: #1e4466; --rule-2: #2b5a82; --veil: rgb(14 43 69 / .86); --glass: rgb(14 43 69 / .5); }
@media (prefers-color-scheme: dark) {
  :root[data-atmosphere="neutral"]:not([data-theme="light"]) { --paper: #181d24; --paper-2: #232a33; --rule: #2c343f; --rule-2: #3c4652; --veil: rgb(24 29 36 / .88); --glass: rgb(24 29 36 / .55); }
  :root[data-atmosphere="convective"]:not([data-theme="light"]) { --paper: #0e2b45; --paper-2: #163b5c; --rule: #1e4466; --rule-2: #2b5a82; --veil: rgb(14 43 69 / .86); --glass: rgb(14 43 69 / .5); }
}
.top, .after::before, .home .colophon { transition: background-color .8s var(--ease); }

/* Condition buttons carry their meaning on a second line. */
.seg small { display: block; margin-top: .05rem; font-size: .68rem; line-height: 1.2; opacity: .78; }
.seg:has(small) span { border-radius: 12px; padding-block: .35rem; }
.seg:has(small) { border-radius: 16px; }

/* ---------- Research: governing equations ---------- */

.theory { max-width: 46rem; margin-top: 2.5rem; }
.theory p { font-size: 1.04rem; line-height: 1.55; color: var(--ink-2); }
.theory .equations { margin: 1.5rem 0; }
.theory .eq-body { overflow-x: auto; overflow-y: hidden; padding-bottom: .2rem; }
.ol { text-decoration: overline; text-decoration-thickness: 1px; text-underline-offset: 0; }
.ub { display: inline-flex; flex-direction: column; align-items: stretch; vertical-align: top; }
.ub-term { white-space: nowrap; }
.ub-brace { height: .45em; margin: .15em .1em 0; border: 1px solid currentColor; border-top: 0; border-radius: 0 0 .4em .4em; opacity: .55; }
.ub-label { margin-top: .1em; text-align: center; font-size: .85em; color: var(--warm); }
.theory-now { padding: .8rem 1rem; border-left: 2px solid; border-image: var(--theta) 1; background: color-mix(in srgb, var(--paper-2) 50%, transparent); }
.theory-now-label { display: block; margin-bottom: .2rem; font-family: var(--sans); font-size: .78rem; font-weight: 600; color: var(--ink); }
.theory .eq-body { flex: 1; min-width: 0; }
@media (max-width: 44rem) {
  .theory .equations { font-size: .92rem; }
}
.theory .equations { grid-template-columns: minmax(0, 1fr); }
.theory .eq { min-width: 0; }

/* Colour key beside the height axis (desktop); the panel keeps it on small screens. */
.flow-theta {
  position: absolute;
  left: 0; top: 0;
  display: grid;
  grid-template-rows: auto 1fr auto;
  justify-items: start;
  gap: .3rem;
  width: max-content;
  font-size: .68rem;
  color: var(--ink-2);
  opacity: 0;
  pointer-events: none;
  will-change: transform;
  transition: opacity 1.2s var(--ease) .4s;
}
.has-flow .flow-theta { opacity: 1; }
.home.scrolled .flow-theta { opacity: 0; transition-delay: 0s; transition-duration: .4s; }
.flow-theta-bar { width: 6px; border-radius: 6px; background: var(--theta-up); }
.flow-theta-name {
  position: absolute;
  left: 14px; top: 50%;
  translate: 0 -50%;
  writing-mode: vertical-rl;
  rotate: 180deg;
  white-space: nowrap;
}
.flow-theta-name i { font-family: var(--serif); font-size: 1.15em; }
@media (min-width: 62rem) {
  .flow-panel .theta { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); }
}
@media (max-width: 62rem) {
  .flow-theta { display: none; }
}
@media (min-width: 62rem) {
  .hero-foot { grid-template-columns: minmax(0, 1fr) minmax(18rem, 23rem) 8.5rem; }
}
@media (max-width: 62rem) {
  .hero-axis-slot { display: none; }
}