/* Tokens ---------------------------------------------------------------- */
:root {
  --paper: #E7EAEE;      /* anodized aluminium */
  --paper-2: #DCE0E6;    /* recessed panels */
  --ink: #12203A;        /* deep navy, primary text and lines */
  --graphite: #4B566A;   /* secondary text */
  --rule: #B9C0CB;       /* hairlines */
  --servo: #3366F0;      /* the one accent: Trex's blue feet */
  --white: #F7F8FA;

  --wide: "wdth" 125;
  --narrow: "wdth" 75;
  --max: 1160px;
  --gutter: clamp(16px, 4vw, 40px);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Archivo", system-ui, sans-serif;
  font-size: 17px;
  line-height: 1.6;
  font-variation-settings: "wdth" 100;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration-color: var(--servo); text-decoration-thickness: 2px; text-underline-offset: 3px; }
a:hover { color: var(--servo); }
:focus-visible { outline: 3px solid var(--servo); outline-offset: 3px; border-radius: 2px; }

h1, h2, h3 { margin: 0; line-height: 1.1; font-weight: 800; }
h2 {
  font-size: clamp(30px, 4.4vw, 48px);
  font-variation-settings: var(--wide);
  letter-spacing: -0.02em;
  margin-bottom: 40px;
}
h3 { font-size: 20px; font-weight: 700; letter-spacing: -0.005em; }
p { margin: 0 0 1em; }
ul { margin: 0; padding-left: 1.1em; }
li { margin-bottom: .45em; }
li::marker { color: var(--servo); }

.skip { position: absolute; left: -999px; top: 8px; background: var(--ink); color: var(--white); padding: 8px 12px; z-index: 10; }
.skip:focus { left: 8px; }

/* Top bar --------------------------------------------------------------- */
.topbar {
  position: sticky; top: 0; z-index: 5;
  display: flex; justify-content: space-between; align-items: center; gap: 16px;
  padding: 14px var(--gutter);
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid transparent;
}
.topbar.scrolled { border-bottom-color: var(--rule); }
.mark { font-weight: 800; font-variation-settings: var(--wide); text-decoration: none; font-size: 15px; }
.topbar nav { display: flex; gap: clamp(12px, 2.5vw, 28px); font-size: 15px; }
.topbar nav a { text-decoration: none; color: var(--graphite); }
.topbar nav a:hover { color: var(--ink); }

/* Hero ------------------------------------------------------------------ */
.hero {
  max-width: var(--max); margin: 0 auto;
  padding: clamp(32px, 7vw, 88px) var(--gutter) 40px;
  display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); gap: 24px; align-items: center;
  min-height: min(88vh, 760px);
}
.hero h1 {
  font-size: clamp(60px, 10vw, 128px);
  font-weight: 900;
  font-variation-settings: var(--wide);
  letter-spacing: -0.035em;
  line-height: .88;
  margin-bottom: 28px;
}
.role {
  font-size: clamp(19px, 2.2vw, 24px); font-weight: 600;
  font-variation-settings: var(--narrow);
  margin-bottom: 16px;
}
.lede { max-width: 33em; color: var(--graphite); font-size: 18px; margin-bottom: 32px; }

.actions { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.btn {
  display: inline-block; padding: 11px 20px;
  border: 2px solid var(--ink); border-radius: 999px;
  text-decoration: none; font-weight: 600; font-size: 15px; line-height: 1.2;
  transition: background-color .15s, color .15s, border-color .15s;
}
.btn:hover { background: var(--ink); color: var(--white); }
.btn-solid { background: var(--ink); color: var(--white); }
.btn-solid:hover { background: var(--servo); border-color: var(--servo); }
.socials { display: flex; gap: 4px; }
.icon-link { display: inline-grid; place-items: center; width: 44px; height: 44px; border-radius: 50%; }
.icon-link svg { width: 22px; height: 22px; fill: var(--ink); }
.icon-link:hover svg { fill: var(--servo); }

.hero-arm { margin: 0; width: 100%; }
.hero-arm canvas { width: 100%; aspect-ratio: 1 / 1; display: block; touch-action: pan-y; }
.hero-arm figcaption {
  display: flex; justify-content: flex-end; gap: 16px; margin-top: 6px; font-size: 13px; color: var(--graphite);
  font-variant-numeric: tabular-nums;
}
.hero-arm figcaption b { color: var(--ink); font-weight: 600; display: inline-block; min-width: 3.2em; text-align: right; }

/* Highlights ------------------------------------------------------------ */
.proof {
  max-width: var(--max); margin: 0 auto 24px; padding: 28px var(--gutter);
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px;
  border-top: 2px solid var(--ink);
}
.proof p { margin: 0; color: var(--graphite); font-size: 15px; max-width: 26em; }
.proof strong {
  display: block; color: var(--ink);
  font-size: clamp(24px, 2.6vw, 30px); font-weight: 800; line-height: 1.15;
  font-variation-settings: var(--wide); letter-spacing: -0.015em; margin-bottom: 6px;
}

/* Blocks ---------------------------------------------------------------- */
.block { max-width: var(--max); margin: 0 auto; padding: clamp(56px, 9vw, 112px) var(--gutter) 0; }

/* Experience: a real timeline, so dates get their own column */
.job { display: grid; grid-template-columns: 190px minmax(0, 1fr); gap: 32px; padding: 28px 0; border-top: 1px solid var(--rule); }
.job-when { font-weight: 600; font-size: 15px; font-variant-numeric: tabular-nums; }
.job-when span { font-weight: 400; color: var(--graphite); }
.job h3 { font-size: 22px; margin-bottom: 14px; }
.job .at { display: block; font-weight: 500; font-size: 17px; color: var(--graphite); margin-top: 4px; font-variation-settings: "wdth" 100; }
.job ul { max-width: 46em; }

.latency { margin: 14px 0 4px 1.1em; max-width: 40em; display: grid; gap: 10px; }
.lat-row { display: grid; grid-template-columns: 13.5em minmax(0, 1fr) 4.5em; gap: 12px; align-items: center; font-size: 14px; }
.lat-label { color: var(--graphite); }
.lat-bar { height: 12px; width: var(--w); background: var(--rule); border-radius: 0 6px 6px 0; }
.lat-best { background: var(--servo); }
.lat-val { font-weight: 700; font-variant-numeric: tabular-nums; text-align: right; }

/* Projects -------------------------------------------------------------- */
.feature {
  display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 6fr); gap: clamp(24px, 4vw, 56px);
  align-items: center; margin-bottom: clamp(48px, 7vw, 88px);
}
.feature img { width: 100%; max-height: 620px; object-fit: cover; border-radius: 6px; }
.walk { margin: calc(-1 * clamp(24px, 4vw, 56px)) 0 clamp(48px, 7vw, 88px); }
.walk img { width: 100%; border-radius: 6px; background: var(--paper-2); }
.walk figcaption { margin-top: 10px; font-size: 14px; color: var(--graphite); }
.feature-flip { grid-template-columns: minmax(0, 6fr) minmax(0, 5fr); }
.feature-flip img { order: 2; background: var(--white); object-fit: contain; padding: 12px; }
.feature h3 { font-size: clamp(26px, 3vw, 34px); font-variation-settings: var(--wide); letter-spacing: -0.015em; margin-bottom: 16px; }
.feature-text > p:first-of-type { font-size: 18px; }
.feature ul { margin-bottom: 18px; }

.tags { font-size: 14px; color: var(--graphite); margin: 0; }
.links { margin: 10px 0 0; font-weight: 600; }

.grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 48px 40px; }
.tile img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; object-position: left center; border-radius: 6px; margin-bottom: 18px; background: #000; }
.tile h3 { margin-bottom: 8px; }
.tile p { color: var(--graphite); max-width: 34em; }
.tile .tags { margin-top: -4px; }

.sub { margin: clamp(56px, 8vw, 88px) 0 8px; font-size: 22px; font-variation-settings: var(--wide); }
.index { list-style: none; padding: 0; }
.index li {
  display: grid; grid-template-columns: 15em minmax(0, 1fr) 15em; gap: 24px;
  padding: 18px 0; margin: 0; border-bottom: 1px solid var(--rule);
}
.index li > a, .index .name { font-weight: 700; }
.index li > a:first-child { text-decoration-thickness: 2px; }
.index li > span:not(.name) { color: var(--graphite); }
.index em { font-style: normal; font-size: 14px; color: var(--graphite); text-align: right; }

/* Publications ---------------------------------------------------------- */
.pub { padding: 28px 0; border-top: 1px solid var(--rule); }
.pub > *, .pub-img > div > * { max-width: 46em; }
.pub h3 { font-size: 21px; margin-bottom: 10px; line-height: 1.25; }
.pub p:last-child { color: var(--graphite); margin: 0; }
.pub-venue { font-size: 14px; font-weight: 600; color: var(--servo); margin-bottom: 6px; }
.pub-img { display: grid; grid-template-columns: minmax(0, 2fr) minmax(0, 3fr); gap: clamp(24px, 4vw, 48px); align-items: start; }
.pub-img > * { min-width: 0; }
.pub-img img { width: 100%; border-radius: 6px; }

/* Skills & education ---------------------------------------------------- */
.two-col { display: grid; grid-template-columns: minmax(0, 3fr) minmax(0, 2fr); gap: clamp(40px, 6vw, 88px); }
.skills { margin: 0; }
.skills dt { font-weight: 700; margin-top: 18px; }
.skills dt:first-child { margin-top: 0; }
.skills dd { margin: 4px 0 0; color: var(--graphite); }
.edu { padding-bottom: 20px; margin-bottom: 20px; border-bottom: 1px solid var(--rule); }
.edu h3 { margin-bottom: 6px; }
.edu p { margin: 0 0 4px; }
.muted { color: var(--graphite); font-size: 15px; }

/* Contact --------------------------------------------------------------- */
.contact {
  max-width: var(--max); margin: clamp(72px, 10vw, 128px) auto 0; padding: clamp(32px, 5vw, 56px) var(--gutter);
  background: var(--ink); color: var(--white);
  display: grid; grid-template-columns: 160px minmax(0, 1fr); gap: 40px; align-items: center;
  border-radius: 12px;
}
.contact img { width: 160px; height: 160px; border-radius: 50%; object-fit: cover; filter: grayscale(.15); }
.contact h2 { margin-bottom: 14px; font-size: clamp(28px, 3.8vw, 42px); }
.contact p { color: #C9D0DC; max-width: 38em; }
.contact .btn { border-color: var(--white); color: var(--white); }
.contact .btn:hover { background: var(--white); color: var(--ink); }
.contact .btn-solid { background: var(--servo); border-color: var(--servo); }
.contact .btn-solid:hover { background: var(--white); border-color: var(--white); color: var(--ink); }
.contact-links { display: flex; flex-wrap: wrap; gap: 12px; margin: 24px 0 0; }

.foot {
  max-width: var(--max); margin: 0 auto; padding: 32px var(--gutter) 40px;
  display: flex; justify-content: space-between; gap: 16px; font-size: 14px; color: var(--graphite);
}
.foot p { margin: 0; }

/* Responsive ------------------------------------------------------------ */
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; min-height: 0; }
  .hero-arm { max-width: 460px; justify-self: center; }
  .hero-arm canvas { aspect-ratio: 4 / 3; }
  .proof { grid-template-columns: 1fr; gap: 20px; }
  .job { grid-template-columns: 1fr; gap: 8px; }
  .feature, .feature-flip { grid-template-columns: 1fr; }
  .feature-flip img { order: 0; }
  .feature img { max-height: 520px; }
  .index li { grid-template-columns: 1fr; gap: 4px; }
  .index em { text-align: left; }
  .two-col { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  body { font-size: 16px; }
  .topbar nav a:nth-child(3) { display: none; }
  .grid { grid-template-columns: 1fr; }
  .lat-row { grid-template-columns: 1fr 4.5em; }
  .lat-label { grid-column: 1 / -1; margin-bottom: -6px; }
  .latency { margin-left: 0; }
  .pub-img { grid-template-columns: 1fr; }
  .pub-img img { max-width: 460px; }
  .contact { grid-template-columns: 1fr; border-radius: 0; }
  .contact img { width: 112px; height: 112px; }
}
@media (max-width: 420px) {
  .mark { display: none; }
  .topbar { justify-content: center; }
}

/* Print / save as PDF ---------------------------------------------------- */
@media print {
  .topbar, .skip { position: static; }
  .topbar nav, .hero-arm figcaption { display: none; }
  .hero { min-height: 0; }
  .job, .feature, .tile, .pub, .edu, .index li, .contact { break-inside: avoid; }
  .contact { -webkit-print-color-adjust: exact; print-color-adjust: exact; }
  a { text-decoration: none; }
}