@font-face {
  font-family: "Newsreader";
  src: url("fonts/newsreader-latin-opsz-normal.woff2") format("woff2");
  font-weight: 200 800;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Newsreader";
  src: url("fonts/newsreader-latin-opsz-italic.woff2") format("woff2");
  font-weight: 200 800;
  font-style: italic;
  font-display: swap;
}
@font-face {
  font-family: "IBM Plex Sans";
  src: url("fonts/ibm-plex-sans-latin-wght-normal.woff2") format("woff2");
  font-weight: 100 700;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "IBM Plex Mono";
  src: url("fonts/ibm-plex-mono-latin-400-normal.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "IBM Plex Mono";
  src: url("fonts/ibm-plex-mono-latin-500-normal.woff2") format("woff2");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

:root {
  --serif: "Newsreader", Georgia, "Times New Roman", serif;
  --sans: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "Cascadia Mono", Consolas, monospace;
  --mm: 8px;
  --gutter: clamp(20px, 4vw, 48px);
}

:root,
[data-theme="paper"] {
  color-scheme: light;
  --bg: #faf6ef;
  --bg-raised: #fffdf8;
  --ink: #1d1a17;
  --ink-2: #544e47;
  --ink-3: #6f675e;
  --rule: rgba(29, 26, 23, 0.14);
  --rule-strong: rgba(29, 26, 23, 0.32);
  --accent: #b3261e;
  --alarm: #b3261e;
  --on-primary: #faf6ef;
  --primary: #1d1a17;
  --grid-minor: rgba(199, 56, 48, 0.09);
  --grid-major: rgba(199, 56, 48, 0.2);
  --trace: #1d1a17;
  --trace-glow: transparent;
}

[data-theme="monitor"] {
  color-scheme: dark;
  --bg: #060d0b;
  --bg-raised: #0b1512;
  --ink: #e7f3ed;
  --ink-2: #a6bbb1;
  --ink-3: #84998f;
  --rule: rgba(190, 235, 215, 0.15);
  --rule-strong: rgba(190, 235, 215, 0.34);
  --accent: #4be3a0;
  --alarm: #ff8f73;
  --on-primary: #04140d;
  --primary: #4be3a0;
  --grid-minor: rgba(75, 227, 160, 0.045);
  --grid-major: rgba(75, 227, 160, 0.1);
  --trace: #4be3a0;
  --trace-glow: rgba(75, 227, 160, 0.8);
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

@view-transition { navigation: auto; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.25s ease, color 0.25s ease;
}

::selection { background: var(--accent); color: var(--bg); }

a { color: inherit; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}

button { font: inherit; color: inherit; cursor: pointer; }

.skip {
  position: absolute;
  left: 12px;
  top: -60px;
  z-index: 20;
  padding: 8px 14px;
  background: var(--primary);
  color: var(--on-primary);
}
.skip:focus { top: 12px; }

/* Hero: a sheet of EKG paper, or the glass of a monitor. */
.hero {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: min(100svh, 980px);
  border-bottom: 1px solid var(--rule);
  overflow: hidden;
  isolation: isolate;
}

.hero-grid {
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(to right, var(--grid-major) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-major) 1px, transparent 1px),
    linear-gradient(to right, var(--grid-minor) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-minor) 1px, transparent 1px);
  background-size:
    calc(var(--mm) * 5) calc(var(--mm) * 5),
    calc(var(--mm) * 5) calc(var(--mm) * 5),
    var(--mm) var(--mm),
    var(--mm) var(--mm);
  -webkit-mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.42), rgba(0, 0, 0, 0.6) 58%, #000 80%);
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.42), rgba(0, 0, 0, 0.6) 58%, #000 80%);
}

.hero-top,
.hero-body {
  width: 100%;
  max-width: 1280px;
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.hero-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  padding-top: clamp(22px, 3.5vw, 38px);
}

.identity h1 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(1.5rem, 2.2vw, 1.875rem);
  font-weight: 500;
  line-height: 1.15;
  letter-spacing: -0.012em;
}

.credential {
  margin: 7px 0 0;
  font-size: clamp(0.9375rem, 1.25vw, 1.0625rem);
  font-weight: 500;
  line-height: 1.35;
  color: var(--ink);
}

.cred-part + .cred-part::before {
  content: "·";
  margin-inline: 0.45em;
  color: var(--ink-3);
}

/* Informatics definition */
.term-wrap { position: relative; display: inline-block; }

.term {
  padding: 0;
  border: 0;
  background: none;
  font-family: inherit;
  font-size: inherit;
  letter-spacing: inherit;
  color: inherit;
  text-decoration: underline dotted var(--accent) 1.5px;
  text-underline-offset: 4px;
  cursor: help;
}

.term-mark {
  margin-left: 3px;
  color: var(--accent);
  font-weight: 500;
}

.term-def {
  position: absolute;
  left: -8px;
  top: calc(100% + 10px);
  z-index: 10;
  width: min(320px, 72vw);
  padding: 12px 14px;
  background: var(--bg-raised);
  border: 1px solid var(--rule-strong);
  border-radius: 4px;
  box-shadow: 0 12px 34px rgba(0, 0, 0, 0.16);
  font-family: var(--sans);
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--ink);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-3px);
  transition: opacity 0.16s ease, transform 0.16s ease, visibility 0.16s;
}

.term-wrap:hover .term-def,
.term:focus-visible + .term-def,
.term[aria-expanded="true"] + .term-def {
  opacity: 1;
  visibility: visible;
  transform: none;
}

/* Theme switch */
.theme {
  display: inline-flex;
  flex: none;
  padding: 2px;
  background: var(--bg);
  border: 1px solid var(--rule-strong);
  border-radius: 4px;
}

.theme button {
  padding: 4px 10px;
  border: 0;
  border-radius: 2px;
  background: none;
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--ink-2);
  transition: background-color 0.18s ease, color 0.18s ease;
}

.theme button[aria-pressed="true"] {
  background: var(--primary);
  color: var(--on-primary);
}

.hero-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-block: clamp(36px, 6vh, 72px);
}

.statement {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(2.5rem, 5.05vw, 4.75rem);
  font-weight: 380;
  line-height: 1.04;
  letter-spacing: -0.024em;
}

.clause { display: block; }

.statement em {
  font-style: italic;
  color: var(--accent);
}

.hero-copy {
  margin: clamp(20px, 3vh, 32px) 0 0;
  max-width: 41em;
  font-size: clamp(1.0625rem, 1.4vw, 1.1875rem);
  color: var(--ink-2);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 18px;
  margin-top: clamp(22px, 3vh, 32px);
}

.btn {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 20px;
  border: 1px solid var(--rule-strong);
  border-radius: 4px;
  background: var(--bg);
  font-size: 0.9375rem;
  font-weight: 500;
  text-decoration: none;
  transition: transform 0.15s ease, border-color 0.15s ease, background-color 0.15s ease;
}

.btn:hover { border-color: var(--ink); transform: translateY(-1px); }

.btn-primary {
  background: var(--primary);
  border-color: var(--primary);
  color: var(--on-primary);
}

.btn-small { min-height: 36px; padding: 0 14px; font-size: 0.875rem; }

.link {
  font-size: 0.9375rem;
  font-weight: 500;
  text-decoration: underline;
  text-decoration-color: var(--rule-strong);
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
  transition: text-decoration-color 0.15s ease, color 0.15s ease;
}

.link:hover { color: var(--accent); text-decoration-color: currentColor; }

/* Rhythm strip */
.strip { margin: 0; flex: none; }

.strip-meta {
  display: flex;
  align-items: center;
  gap: 18px;
  width: 100%;
  max-width: 1280px;
  margin-inline: auto;
  padding-inline: var(--gutter);
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--ink-2);
}

.strip-lead { font-weight: 500; color: var(--ink); }
.strip-spacer { flex: 1; }
.strip-rate { display: inline-flex; align-items: center; gap: 7px; color: var(--ink); }

.strip-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.45;
}

.strip-pause {
  padding: 2px 8px;
  border: 1px solid var(--rule-strong);
  border-radius: 3px;
  background: var(--bg);
  font-family: var(--mono);
  font-size: 0.6875rem;
  color: var(--ink-2);
}
.strip-pause:hover { color: var(--ink); border-color: var(--ink); }
.strip-pause[hidden] { display: none; }

#strip-canvas {
  display: block;
  width: 100%;
  height: calc(var(--mm) * 21);
}

/* Page layout */
.layout {
  display: grid;
  grid-template-columns: 236px minmax(0, 1fr);
  gap: clamp(40px, 6vw, 96px);
  max-width: 1280px;
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.rail {
  position: sticky;
  top: 0;
  align-self: start;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: 100vh;
  padding-block: clamp(48px, 9vh, 96px) 40px;
}

.rail-id { margin-bottom: 26px; }

.rail-name {
  margin: 0;
  font-family: var(--serif);
  font-size: 1.25rem;
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.rail-cred {
  margin: 5px 0 0;
  font-size: 0.8125rem;
  line-height: 1.45;
  color: var(--ink-2);
}

.rail-nav {
  margin: 0;
  padding: 0;
  list-style: none;
}

.rail-nav a {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 40px;
  font-size: 0.875rem;
  color: var(--ink-3);
  text-decoration: none;
  transition: color 0.2s ease;
}

.rail-nav a:hover,
.rail-nav a[aria-current] { color: var(--ink); }
.rail-nav a[aria-current] { font-weight: 500; }

.mark {
  flex: none;
  width: 44px;
  height: 14px;
  overflow: visible;
  fill: none;
  stroke-width: 1.25;
  stroke-linejoin: round;
}

.mark .flat {
  stroke: var(--rule-strong);
  transition: opacity 0.2s ease;
}

.mark .beat {
  stroke: var(--accent);
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
  transition: stroke-dashoffset 0.65s ease;
}

.rail-nav a:hover .beat,
.rail-nav a[aria-current] .beat { stroke-dashoffset: 0; }
.rail-nav a:hover .flat,
.rail-nav a[aria-current] .flat { opacity: 0; }

.rail-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
}
.rail-foot .link { font-size: 0.875rem; }

/* Sections */
main { min-width: 0; }

section {
  padding-block: clamp(56px, 9vh, 104px);
  border-top: 1px solid var(--rule);
  scroll-margin-top: 0;
}
section:first-child { border-top: 0; }

.eyebrow {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--accent);
}

h2 {
  margin: 0;
  max-width: 19em;
  font-family: var(--serif);
  font-size: clamp(2rem, 3.7vw, 3.125rem);
  font-weight: 400;
  line-height: 1.08;
  letter-spacing: -0.018em;
  text-wrap: balance;
}

.lede {
  margin: 20px 0 0;
  max-width: 38em;
  font-size: 1.1875rem;
  line-height: 1.55;
  color: var(--ink-2);
}

.footnote {
  margin: 14px 0 0;
  font-size: 0.875rem;
  color: var(--ink-3);
}

/* The short version */
.lenses {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(24px, 3vw, 40px);
  margin-top: clamp(32px, 5vh, 52px);
}

.lens { border-top: 1px solid var(--rule-strong); padding-top: 14px; }

.lens-label {
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--ink-3);
}

.lens h3 {
  margin: 0 0 8px;
  font-family: var(--serif);
  font-size: 1.4375rem;
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.lens p:last-child {
  margin: 0;
  font-size: 0.9875rem;
  color: var(--ink-2);
}

.lens-foot {
  margin: clamp(26px, 4vh, 36px) 0 0;
  padding-top: 16px;
  max-width: 46em;
  border-top: 1px solid var(--rule-strong);
  font-size: 1.0625rem;
  color: var(--ink-2);
}
.lens-foot strong { font-weight: 600; color: var(--ink); }

/* Links to the work. A .soon label is a placeholder: swap it for an a.proof once the file is up. */
.proofs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 8px;
  margin: 12px 0 0;
  padding-left: 128px;
}

.proofs-flush { padding-left: 0; }

li .proofs { margin-top: 8px; }

.soon,
.proof {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0 9px;
  border-radius: 3px;
  font-family: var(--mono);
  font-size: 0.75rem;
  line-height: 1.2;
}

.soon {
  border: 1px dashed var(--rule-strong);
  color: var(--ink-3);
}

.also .proof,
.proof {
  margin: 0;
  border: 1px solid var(--rule-strong);
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--ink);
  text-decoration: none;
  transition: border-color 0.15s ease, color 0.15s ease;
}
.proof:hover { border-color: var(--accent); color: var(--accent); }

/* Coming-soon labels are hidden for launch. Delete these two rules to show them again. */
.soon { display: none; }
.proofs:not(:has(.proof)) { display: none; }

/* ElderCore's benchmark */
.table-wrap { overflow-x: auto; }

.results {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--mono);
  font-size: 0.75rem;
  line-height: 1.35;
  font-variant-numeric: tabular-nums;
}

.results caption {
  padding-bottom: 8px;
  caption-side: top;
  text-align: left;
  color: var(--ink-3);
}

.results th,
.results td {
  padding: 6px 12px 6px 0;
  border-top: 1px solid var(--rule);
  font-weight: 400;
  text-align: left;
  white-space: nowrap;
}

.results thead th { border-top: 0; color: var(--ink-3); }
.results .num { padding-right: 0; padding-left: 12px; text-align: right; }

.results .won th,
.results .won td { color: var(--ink); font-weight: 500; }
.results .won th { box-shadow: inset 2px 0 0 var(--accent); padding-left: 8px; }

.results .lost th,
.results .lost td { color: var(--alarm); }
.results .lost th { box-shadow: inset 2px 0 0 var(--alarm); padding-left: 8px; }

/* Leakage demonstration */
.leak {
  margin-top: clamp(28px, 4vh, 40px);
  padding: clamp(18px, 3vw, 32px);
  background: var(--bg-raised);
  border: 1px solid var(--rule-strong);
  border-radius: 6px;
}

.leak-controls {
  display: inline-flex;
  flex-wrap: wrap;
  padding: 3px;
  border: 1px solid var(--rule-strong);
  border-radius: 5px;
}

.leak-controls button {
  min-height: 40px;
  padding: 0 14px;
  border: 0;
  border-radius: 3px;
  background: none;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--ink-2);
  transition: background-color 0.18s ease, color 0.18s ease;
}

.leak-controls button:hover { color: var(--ink); }

.leak-controls button[aria-pressed="true"] {
  background: var(--primary);
  color: var(--on-primary);
}

.leak-result {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: end;
  gap: clamp(24px, 4vw, 56px);
  margin-top: 22px;
}

.leak-number {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(4.25rem, 9vw, 7.25rem);
  font-weight: 340;
  line-height: 0.95;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums lining-nums;
  transition: color 0.3s ease;
}

.leak-unit { font-size: 0.55em; margin-left: 0.06em; color: var(--ink-3); }

.leak[data-state="leak"] .leak-number { color: var(--alarm); }

.leak-caption {
  margin: 8px 0 0;
  font-family: var(--mono);
  font-size: 0.75rem;
  line-height: 1.45;
  color: var(--ink-3);
}

.leak-dots {
  display: grid;
  grid-template-columns: repeat(19, minmax(0, 1fr));
  gap: clamp(3px, 0.7vw, 7px);
  max-width: 420px;
}

.leak-dot {
  aspect-ratio: 1;
  border: 1.5px solid var(--ink);
  border-radius: 50%;
  background: var(--ink);
  transition: background-color 0.35s ease, border-color 0.35s ease, transform 0.35s ease;
}

.leak[data-state="fixed"] .leak-dot-miss {
  background: transparent;
  border-color: var(--alarm);
  transform: scale(1.12);
}

.leak-note {
  margin: 22px 0 0;
  padding: 16px clamp(0px, 7%, 72px) 0 0;
  border-top: 1px solid var(--rule);
  font-size: 1rem;
}
.leak-note strong { font-weight: 600; }

.leak[data-state="leak"] .leak-note-fixed,
.leak[data-state="fixed"] .leak-note-leak { display: none; }

/* Case studies: read like a chart entry, one labeled line after another. */
.case {
  padding-block: clamp(30px, 5vh, 46px);
  border-top: 1px solid var(--rule);
}
.case:first-of-type { margin-top: clamp(26px, 4vh, 40px); }

.case-kicker {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 2px 18px;
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--ink-3);
}

.case h3 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(1.625rem, 2.5vw, 2.0625rem);
  font-weight: 450;
  line-height: 1.12;
  letter-spacing: -0.014em;
}

.case h3 a { text-decoration: none; transition: color 0.15s ease; }
.case h3 a:hover { color: var(--accent); }

.arrow {
  display: inline-block;
  margin-left: 0.2em;
  font-family: var(--sans);
  font-size: 0.72em;
  color: var(--ink-3);
  transition: transform 0.15s ease;
}
a:hover > .arrow { transform: translate(2px, -2px); color: inherit; }

.case-lede {
  margin: 8px 0 0;
  max-width: 40em;
  font-size: 1.0625rem;
  color: var(--ink-2);
}

.fields { margin: 20px 0 0; }

.fields > div {
  display: grid;
  grid-template-columns: 112px minmax(0, 1fr);
  gap: 16px;
  padding-block: 9px;
}

.fields dt {
  padding-top: 3px;
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--ink-3);
}

.fields dd {
  margin: 0;
  font-size: 0.9875rem;
  color: var(--ink);
}

.checked dt { color: var(--accent); font-weight: 500; }
.checked {
  margin-top: 4px;
  border-top: 1px dashed var(--rule-strong);
}

.stack {
  margin: 12px 0 0;
  padding-left: 128px;
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--ink-3);
}

.rules {
  display: block;
  margin-bottom: 10px;
  font-family: var(--mono);
  font-size: 0.8125rem;
  line-height: 1.5;
}

.rule {
  display: block;
  padding: 7px 10px;
  border-left: 2px solid var(--accent);
  background: var(--bg-raised);
}
.rule + .rule { margin-top: 5px; }

.rule-if,
.rule-then { color: var(--accent); font-weight: 500; }

.roles {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px 0;
  margin-top: 10px;
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--ink-2);
}
.roles span + span::before {
  content: "→";
  margin-inline: 8px;
  color: var(--accent);
}

.also-title {
  margin: clamp(32px, 5vh, 48px) 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--rule);
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--accent);
}

.also {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px clamp(24px, 4vw, 44px);
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
  font-size: 0.9375rem;
  color: var(--ink-2);
}

.also strong,
.also a {
  display: block;
  margin-bottom: 2px;
  font-family: var(--serif);
  font-size: 1.1875rem;
  font-weight: 500;
  line-height: 1.25;
  color: var(--ink);
  text-decoration: none;
}
.also a:hover { color: var(--accent); }

/* Experience */
.job {
  display: grid;
  grid-template-columns: 148px minmax(0, 1fr);
  gap: 16px;
  padding-block: 26px;
  border-top: 1px solid var(--rule);
}
.job:first-of-type { margin-top: clamp(26px, 4vh, 40px); }

.job-dates {
  margin: 0;
  padding-top: 5px;
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--ink-3);
}

.job h3 {
  margin: 0;
  font-family: var(--serif);
  font-size: 1.4375rem;
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.job-org { margin: 3px 0 0; font-size: 0.9375rem; color: var(--ink-2); }

.job p:not(.job-dates):not(.job-org) {
  margin: 10px 0 0;
  font-size: 0.9875rem;
  color: var(--ink-2);
}

.job ul {
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
  font-size: 0.9875rem;
  color: var(--ink-2);
}

.job li {
  position: relative;
  padding-left: 18px;
}
.job li + li { margin-top: 6px; }
.job li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.8em;
  width: 9px;
  border-top: 1.5px solid var(--accent);
}

/* Skills */
.skills {
  margin: 8px 0 0;
  padding-top: 8px;
  border-top: 1px solid var(--rule);
}
.skills > div {
  display: grid;
  grid-template-columns: 148px minmax(0, 1fr);
  gap: 16px;
  padding-block: 9px;
}
.skills dt {
  padding-top: 3px;
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--ink-3);
}
.skills dd { margin: 0; font-size: 0.9875rem; color: var(--ink); }

/* Contact */
.contact-title { font-size: clamp(2.25rem, 4.8vw, 3.875rem); }

.contact-mail {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 16px;
  margin-top: 30px;
}

.mail {
  font-family: var(--serif);
  font-size: clamp(1.5rem, 3.2vw, 2.375rem);
  letter-spacing: -0.01em;
  line-height: 1.2;
  overflow-wrap: anywhere;
  text-decoration: underline;
  text-decoration-color: var(--accent);
  text-decoration-thickness: 1.5px;
  text-underline-offset: 6px;
}
.mail:hover { color: var(--accent); }

.copy {
  padding: 4px 10px;
  border: 1px solid var(--rule-strong);
  border-radius: 3px;
  background: none;
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--ink-2);
}
.copy:hover { color: var(--ink); border-color: var(--ink); }

/* Footer */
.foot {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 4px 24px;
  max-width: 1280px;
  margin-inline: auto;
  padding: 24px var(--gutter) 36px;
  border-top: 1px solid var(--rule);
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--ink-3);
}
.foot p { margin: 0; }

.notfound {
  max-width: 1280px;
  margin-inline: auto;
  padding: clamp(80px, 22vh, 200px) var(--gutter);
}

/* A quiet settle as sections arrive, where the browser supports it. */
@media (prefers-reduced-motion: no-preference) {
  @supports (animation-timeline: view()) {
    .case, .lens, .job {
      animation: settle linear both;
      animation-timeline: view();
      animation-range: entry 0% entry 26%;
    }
    @keyframes settle {
      from { opacity: 0.25; transform: translateY(12px); }
      to { opacity: 1; transform: none; }
    }
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}

/* Narrow layouts: the rail becomes a sticky bar of sections. */
@media (max-width: 899px) {
  :root { --mm: 6px; }

  .hero { min-height: min(100svh, 860px); }

  .layout {
    display: block;
    padding-inline: 0;
  }

  .rail {
    z-index: 5;
    display: block;
    height: auto;
    padding: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--rule);
  }

  .rail-nav {
    display: flex;
    gap: 2px;
    padding-inline: var(--gutter);
    overflow-x: auto;
    scrollbar-width: none;
  }
  .rail-nav::-webkit-scrollbar { display: none; }

  .rail-nav a {
    flex: none;
    min-height: 46px;
    padding-inline: 8px;
    white-space: nowrap;
    box-shadow: inset 0 -2px 0 transparent;
  }
  .rail-nav li:first-child a { padding-left: 0; }
  .rail-nav a[aria-current] { box-shadow: inset 0 -2px 0 var(--accent); }

  .mark, .rail-foot, .rail-id { display: none; }

  main { padding-inline: var(--gutter); }

  section { scroll-margin-top: 47px; }

  .lenses { grid-template-columns: minmax(0, 1fr); }
  .also { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 599px) {
  .hero-top { flex-wrap: wrap; align-items: center; gap: 6px 12px; }
  .identity { display: contents; }
  .identity h1 { flex: 1; }
  .credential { order: 3; flex-basis: 100%; margin: 0; }
  .cred-part { display: block; }
  .cred-part + .cred-part::before { content: none; }
  .statement { font-size: clamp(2.25rem, 10.4vw, 3.25rem); }
  .hero-actions .btn { flex: 1 1 auto; justify-content: center; }
  .hero-actions .link { margin-right: 6px; }

  .strip-meta { gap: 12px; }

  .leak-result { grid-template-columns: minmax(0, 1fr); gap: 18px; align-items: start; }

  .fields > div,
  .skills > div,
  .job { grid-template-columns: minmax(0, 1fr); gap: 4px; }

  .job-dates { padding-top: 0; }
  .stack, .proofs { padding-left: 0; }
}

@media print {
  .hero-grid, .strip, .theme, .rail, .skip, .copy { display: none; }
  .hero { min-height: 0; border: 0; }
  .layout { display: block; }
  body { background: #fff; }
}