/* ---------- Tokens ---------- */
:root {
  --bg: oklch(0.985 0.003 250);
  --surface: oklch(0.962 0.004 250);
  --ink: oklch(0.22 0.012 250);
  --muted: oklch(0.47 0.012 250);
  --line: oklch(0.89 0.006 250);         /* dividers only */
  --control: oklch(0.6 0.01 250);        /* interactive borders, >= 3:1 */
  --accent: oklch(0.53 0.13 45);         /* copper, like a bare PCB trace */
  --accent-soft: oklch(0.53 0.13 45 / 0.1);
  --error: oklch(0.5 0.18 25);
  --error-soft: oklch(0.5 0.18 25 / 0.14);
  --on-ink: oklch(0.985 0.003 250);

  --font-sans: "Schibsted Grotesk", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;

  --radius-s: 6px;
  --radius-m: 10px;

  --ease-out: cubic-bezier(0.23, 1, 0.32, 1);
  --ease-in-out: cubic-bezier(0.77, 0, 0.175, 1);

  --gutter: clamp(16px, 4vw, 40px);
  --max: 1080px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: oklch(0.17 0.008 250);
    --surface: oklch(0.21 0.009 250);
    --ink: oklch(0.94 0.004 250);
    --muted: oklch(0.72 0.01 250);
    --line: oklch(0.3 0.01 250);
    --control: oklch(0.55 0.01 250);
    --accent: oklch(0.75 0.12 55);
    --accent-soft: oklch(0.75 0.12 55 / 0.12);
    --error: oklch(0.74 0.15 25);
    --error-soft: oklch(0.74 0.15 25 / 0.16);
    --on-ink: oklch(0.17 0.008 250);
  }
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
  -webkit-text-size-adjust: 100%;
  scrollbar-color: var(--control) var(--bg);
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.6;
  caret-color: var(--accent);
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
}

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

h1, h2, h3 { margin: 0; line-height: 1.15; font-weight: 600; text-wrap: balance; }
p { margin: 0; text-wrap: pretty; }
a { color: inherit; text-underline-offset: 3px; }
svg { display: block; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

.wrap {
  width: 100%;
  max-width: var(--max);
  margin-inline: auto;
  padding-inline: max(var(--gutter), env(safe-area-inset-left));
}

.muted { color: var(--muted); }

.skip {
  position: absolute;
  left: 16px;
  top: -48px;
  padding: 8px 12px;
  background: var(--ink);
  color: var(--on-ink);
  border-radius: var(--radius-s);
  z-index: 20;
}
.skip:focus { top: 12px; }

.stack {
  font: 400 0.8125rem/1.6 var(--font-mono);
  color: var(--muted);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 20px;
  border: 1px solid var(--ink);
  border-radius: var(--radius-s);
  background: var(--ink);
  color: var(--on-ink);
  font: 500 0.975rem/1 var(--font-sans);
  text-decoration: none;
  cursor: pointer;
  user-select: none;
  transition: transform 140ms var(--ease-out), background-color 150ms ease, border-color 150ms ease, color 150ms ease;
}
.btn:active { transform: scale(0.97); }

.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--control);
}

@media (hover: hover) and (pointer: fine) {
  .btn:hover { background: var(--accent); border-color: var(--accent); color: var(--on-ink); }
  .btn-ghost:hover { background: var(--surface); border-color: var(--ink); color: var(--ink); }
}

.btn[disabled] { opacity: 0.6; cursor: progress; }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in oklch, var(--bg) 90%, transparent);
  backdrop-filter: saturate(1.4) blur(10px);
  -webkit-backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color 200ms ease;
}
.site-header.scrolled { border-bottom-color: var(--line); }

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  height: 64px;
}

.wordmark {
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
}
.wordmark-short { display: none; font-family: var(--font-mono); font-weight: 500; }

.nav {
  display: flex;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.nav a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 10px;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
  transition: color 150ms ease;
}
.nav a[aria-current] {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--accent);
  text-decoration-thickness: 2px;
  text-underline-offset: 6px;
}
@media (hover: hover) and (pointer: fine) {
  .nav a:hover { color: var(--ink); }
}

@media (max-width: 560px) {
  .wordmark-full { display: none; }
  .wordmark-short { display: inline; }
  .nav a { padding: 0 8px; font-size: 0.925rem; }
}
@media (max-width: 359px) {
  .header-inner { gap: 8px; }
  .nav a { padding: 0 5px; font-size: 0.875rem; }
}

/* ---------- Hero ---------- */
.hero {
  padding-top: clamp(48px, 10vw, 112px);
  padding-bottom: clamp(40px, 7vw, 80px);
}

.hero h1 {
  font-size: clamp(2.75rem, 7vw, 5rem);
  font-weight: 700;
  letter-spacing: -0.025em;
}

.hero-lede {
  max-width: 36ch;
  margin-top: 20px;
  font-size: clamp(1.2rem, 2.2vw, 1.5rem);
  line-height: 1.45;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 0;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
  color: var(--muted);
  font-size: 0.975rem;
}
.hero-meta li { white-space: nowrap; }
.hero-meta li + li::before {
  content: "·";
  padding-inline: 10px;
}
@media (max-width: 420px) {
  .hero-meta { flex-direction: column; }
  .hero-meta li + li::before { content: none; }
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

/* ---------- Trace ---------- */
.trace {
  margin: clamp(40px, 6vw, 64px) 0 0;
  padding: 16px 0 0;
  border-top: 1px solid var(--line);
}

.trace-head {
  display: flex;
  justify-content: space-between;
  font: 400 0.8125rem/1 var(--font-mono);
  color: var(--muted);
  margin-bottom: 12px;
}

.trace-caption {
  margin-top: 12px;
  max-width: 60ch;
  color: var(--muted);
  font-size: 0.925rem;
}

.trace-svg {
  width: 100%;
  height: auto;
  overflow: visible;
}
.trace-svg .tick { stroke: var(--line); stroke-width: 1; }
.trace-svg .signal {
  fill: none;
  stroke: var(--accent);
  stroke-width: 2;
  stroke-linejoin: miter;
}
.trace-svg .frame { fill: var(--accent-soft); }
.trace-svg .byte {
  fill: var(--muted);
  font: 500 13px var(--font-mono);
}
.trace-svg .byte-char { fill: var(--ink); }

.trace-svg.pending .signal {
  stroke-dasharray: var(--len);
  stroke-dashoffset: var(--len);
}
.trace-svg.drawn .signal {
  stroke-dashoffset: 0;
  transition: stroke-dashoffset 1400ms var(--ease-in-out) 150ms;
}

/* ---------- Sections ---------- */
.section {
  padding-top: clamp(64px, 9vw, 112px);
}

.section-title {
  font-size: clamp(1.75rem, 3.4vw, 2.25rem);
  letter-spacing: -0.015em;
  margin-bottom: clamp(24px, 4vw, 40px);
}

/* Selected work */
.feature {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 32px 56px;
  align-items: start;
  padding: clamp(28px, 4vw, 40px) 0;
  border-top: 1px solid var(--line);
}
.feature:first-of-type { border-top: 0; padding-top: 0; }

.feature h3 { font-size: clamp(1.4rem, 2.6vw, 1.75rem); letter-spacing: -0.01em; }
.feature-where { margin-top: 6px; color: var(--muted); }
.feature-text > p:not(.feature-where):not(.stack) { margin-top: 16px; max-width: 52ch; }
.feature .stack { margin-top: 16px; }

/* No panel behind diagrams: the copper wiring is the container. */
.diagram { margin: 0; }
.diagram figcaption {
  margin-top: 16px;
  color: var(--muted);
  font-size: 0.85rem;
}

/* Flash map */
.flash-map {
  display: grid;
  grid-template-rows: auto auto;
  border: 1.5px solid var(--accent);
  border-radius: var(--radius-s);
  overflow: hidden;
}
.region {
  display: grid;
  grid-template-columns: 7.5rem minmax(0, 1fr);
  gap: 2px 16px;
  padding: 14px 16px;
}
.region strong { font-weight: 600; }
.region > span:last-child { grid-column: 2; color: var(--muted); font-size: 0.925rem; }
.region .addr {
  grid-row: span 2;
  font: 400 0.8125rem/1.7 var(--font-mono);
  color: var(--muted);
}
.region-boot { background: var(--accent-soft); }
.region-app { border-top: 1.5px dashed var(--accent); padding-block: 22px; }

.steps {
  counter-reset: step;
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
}
.steps li {
  counter-increment: step;
  position: relative;
  padding: 0 0 12px 36px;
  font-size: 0.95rem;
}
.steps li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 1px;
  width: 22px;
  height: 22px;
  display: grid;
  place-items: center;
  border: 1.5px solid var(--accent);
  border-radius: 50%;
  font: 500 0.75rem/1 var(--font-mono);
  color: var(--ink);
  background: var(--bg);
}
.steps li:not(:last-child)::after {
  content: "";
  position: absolute;
  left: 10.25px;
  top: 25px;
  bottom: 0;
  border-left: 1.5px solid var(--accent);
}
.steps li:last-child { padding-bottom: 0; }

/* Bus diagram */
.bus {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  align-items: center;
}
.bus-hub {
  display: grid;
  gap: 2px;
  padding: 16px;
  background: var(--accent-soft);
  border: 1.5px solid var(--accent);
  border-radius: var(--radius-s);
}
.bus-hub span { color: var(--muted); font-size: 0.9rem; }

.bus-links {
  position: relative;
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0 0 0 28px;
  list-style: none;
}
/* the vertical bus the links hang off */
.bus-links::before {
  content: "";
  position: absolute;
  left: 0;
  top: calc(50% - 0.75px);
  width: 14px;
  border-top: 1.5px solid var(--accent);
}
.bus-links::after {
  content: "";
  position: absolute;
  left: 14px;
  top: 26px;
  bottom: 26px;
  border-left: 1.5px solid var(--accent);
}
.bus-links li {
  position: relative;
  display: grid;
  grid-template-columns: 5.5rem minmax(0, 1fr);
  align-items: center;
}
.bus-links li::before {
  content: "";
  position: absolute;
  left: -14px;
  right: calc(100% - 5.5rem);
  top: 50%;
  border-top: 1.5px solid var(--accent);
  z-index: 0;
}
.bus-proto {
  position: relative;
  z-index: 1;
  justify-self: start;
  margin-left: 10px;
  padding: 2px 6px;
  background: var(--bg);
  font: 500 0.8125rem/1.4 var(--font-mono);
}
.bus-node {
  display: grid;
  padding: 10px 12px;
  border: 1px solid var(--control);
  border-radius: var(--radius-s);
  background: var(--bg);
}
.bus-node span { color: var(--muted); font-size: 0.875rem; }

@media (max-width: 880px) {
  .feature { grid-template-columns: 1fr; }
}

@media (max-width: 520px) {
  .bus { grid-template-columns: 1fr; }
  .bus-links { padding: 0 0 0 20px; }
  .bus-links::before {
    left: 20px;
    top: -1px;
    width: 0;
    height: 12px;
    border-top: 0;
    border-left: 1.5px solid var(--accent);
  }
  .bus-links::after { left: 20px; top: 0; bottom: 26px; }
  .bus-links { margin-top: 12px; }
  .bus-links li { grid-template-columns: 5rem minmax(0, 1fr); }
  .bus-links li::before { left: 0; right: calc(100% - 5rem); }
  .region { grid-template-columns: 1fr; }
  .region .addr { grid-row: auto; }
  .region > span:last-child { grid-column: 1; }
}

/* Experience */
.roles {
  list-style: none;
  margin: 0;
  padding: 0;
}

.role {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  gap: 8px 40px;
  padding: 32px 0;
  border-top: 1px solid var(--line);
}
.role:first-child { border-top: 0; padding-top: 0; }

/* dates set like a decoded frame on the analyzer */
.role-when span {
  display: inline-block;
  padding: 2px 8px;
  background: var(--accent-soft);
  border-radius: 3px;
  font: 400 0.8125rem/1.6 var(--font-mono);
  color: var(--ink);
  white-space: nowrap;
}

.role h3 {
  font-size: 1.3rem;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 12px;
}
.role-title {
  font-size: 1rem;
  font-weight: 400;
  color: var(--muted);
}

.role-lead {
  margin-top: 10px;
  max-width: 60ch;
  font-size: 1.1rem;
  font-weight: 500;
}

.role-where { margin-top: 6px; color: var(--muted); font-size: 0.95rem; }

.project {
  margin-top: 18px;
  font-weight: 500;
}

.points {
  max-width: 68ch;
  margin: 8px 0 0;
  padding-left: 1.1em;
  color: var(--muted);
}
.points li { margin-top: 6px; }
.points li::marker { color: var(--accent); }

@media (max-width: 720px) {
  .role { grid-template-columns: 1fr; padding: 28px 0; }
}

/* Skills and background */
.skills {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 28px 56px;
  margin: 0;
}
.skills dt { font-weight: 600; margin-bottom: 4px; }
.skills dd { margin: 0; color: var(--muted); max-width: 48ch; }

.background {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px 48px;
  margin-top: clamp(40px, 6vw, 64px);
  padding-top: clamp(28px, 4vw, 40px);
  border-top: 1px solid var(--line);
}
.background h3 { font-size: 1.05rem; margin-bottom: 6px; }
.background p + p { margin-top: 4px; }

@media (max-width: 820px) {
  .background { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  .skills { grid-template-columns: 1fr; gap: 22px; }
}

/* ---------- Contact ---------- */
.contact {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  gap: 40px 72px;
  padding-bottom: clamp(64px, 10vw, 120px);
}

.contact-title {
  font-size: clamp(2rem, 4.4vw, 3rem);
  letter-spacing: -0.02em;
}
.contact-intro > p {
  margin-top: 14px;
  color: var(--muted);
  max-width: 38ch;
}

.contact-links {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}
.contact-links li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 56px;
  border-bottom: 1px solid var(--line);
}
.contact-links a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  text-decoration: none;
  overflow-wrap: anywhere;
}
.contact-secondary { color: var(--muted); font-size: 0.925rem; }
@media (hover: hover) and (pointer: fine) {
  .contact-links a:hover { text-decoration: underline; text-decoration-color: var(--accent); }
}

.copy {
  min-height: 44px;
  padding: 0 14px;
  border: 1px solid var(--control);
  border-radius: var(--radius-s);
  background: transparent;
  color: var(--ink);
  font: 400 0.8125rem/1 var(--font-mono);
  cursor: pointer;
  flex-shrink: 0;
  transition: transform 120ms var(--ease-out), background-color 150ms ease;
}
.copy:active { transform: scale(0.97); }
@media (hover: hover) and (pointer: fine) {
  .copy:hover { background: var(--surface); }
}

.form {
  display: grid;
  gap: 20px;
  align-self: start;
  padding: clamp(20px, 3vw, 32px);
  background: var(--surface);
  border-radius: var(--radius-m);
}

.field { display: grid; gap: 8px; }
.field label { font-weight: 500; font-size: 0.95rem; }

.field input,
.field textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--control);
  border-radius: var(--radius-s);
  background: var(--bg);
  color: var(--ink);
  font: 400 1rem/1.5 var(--font-sans); /* 16px so iOS doesn't zoom */
  transition: border-color 150ms ease, box-shadow 150ms ease;
}
.field textarea { resize: vertical; min-height: 128px; }
.field input:focus-visible,
.field textarea:focus-visible {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.field [aria-invalid="true"],
.field [aria-invalid="true"]:focus-visible {
  border-color: var(--error);
  box-shadow: 0 0 0 3px var(--error-soft);
}
.field-error {
  color: var(--error);
  font-size: 0.9rem;
}

.honeypot { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }

.form-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 16px;
}
.form-status { color: var(--muted); font-size: 0.95rem; max-width: 40ch; }
.form-status.error { color: var(--error); }

@media (max-width: 820px) {
  .contact { grid-template-columns: 1fr; }
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--line);
  padding-bottom: env(safe-area-inset-bottom);
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  padding-block: 24px;
  color: var(--muted);
  font-size: 0.9rem;
}
.trace-mini { width: min(220px, 50%); }

/* ---------- Toast ---------- */
.toast {
  position: fixed;
  left: 50%;
  bottom: max(24px, env(safe-area-inset-bottom));
  max-width: calc(100% - 32px);
  padding: 10px 16px;
  background: var(--ink);
  color: var(--on-ink);
  border-radius: var(--radius-s);
  font-size: 0.925rem;
  box-shadow: 0 8px 24px oklch(0 0 0 / 0.18);
  opacity: 0;
  transform: translate(-50%, 8px) scale(0.97);
  pointer-events: none;
  transition: opacity 150ms ease, transform 150ms var(--ease-out);
}
.toast.show {
  opacity: 1;
  transform: translate(-50%, 0) scale(1);
  transition-duration: 220ms;
}

/* =========================================================
   Writing: article list + article page
   ========================================================= */

.page-title {
  font-size: clamp(2.25rem, 5vw, 3.25rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}
.blog-index { padding-top: clamp(48px, 8vw, 96px); padding-bottom: clamp(64px, 10vw, 120px); }
.page-lede { margin-top: 14px; max-width: 52ch; color: var(--muted); font-size: 1.15rem; }

.post-list {
  list-style: none;
  margin: clamp(32px, 5vw, 48px) 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}
.post-list li {
  display: grid;
  grid-template-columns: 9rem minmax(0, 1fr);
  gap: 4px 24px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}
.post-list time {
  font: 400 0.875rem/1.9 var(--font-mono);
  color: var(--muted);
  white-space: nowrap;
}
.post-list a {
  font-size: 1.2rem;
  font-weight: 600;
  text-decoration: none;
  text-wrap: balance;
}
.post-list p { margin-top: 4px; color: var(--muted); max-width: 60ch; }
@media (hover: hover) and (pointer: fine) {
  .post-list a:hover { text-decoration: underline; text-decoration-color: var(--accent); text-decoration-thickness: 2px; }
}
@media (max-width: 560px) {
  .post-list li { grid-template-columns: 1fr; }
}
.more-link { margin-top: 20px; }
.more-link a { text-decoration-color: var(--accent); }
.empty { margin-top: 32px; color: var(--muted); }

/* Article: a datasheet-style title block over a calm reading column */
.post {
  --measure: 37rem;   /* about 65 characters at 18px */
  padding-top: clamp(40px, 7vw, 88px);
  padding-bottom: clamp(56px, 8vw, 96px);
}
.post > * { max-width: var(--measure); margin-inline: auto; }

.post-head {
  padding-bottom: 24px;
  border-bottom: 1px solid var(--ink);
}
.post-head h1 {
  font-size: clamp(2rem, 4.6vw, 2.9rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
}
.post-dek {
  margin-top: 14px;
  font-size: 1.2rem;
  line-height: 1.5;
  color: var(--muted);
}
.post-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 20px;
  margin-top: 20px;
  font: 400 0.875rem/1.6 var(--font-mono);
  color: var(--muted);
}
.draft-flag { color: var(--error); }

.toc {
  margin-top: 28px;
  padding: 16px 20px;
  background: var(--surface);
  border-radius: var(--radius-s);
  font-size: 0.95rem;
}
.toc-title { font-weight: 600; }
.toc ul { margin: 6px 0 0; padding-left: 1.1em; }
.toc li { margin-top: 2px; }
.toc a { color: var(--muted); text-decoration: none; }
@media (hover: hover) and (pointer: fine) {
  .toc a:hover { color: var(--ink); }
}

/* Prose */
.prose {
  counter-reset: fig;
  margin-top: 32px;
  font-size: 1.125rem;
  line-height: 1.72;
}
.prose > * + * { margin-top: 1.15em; }
.prose h2, .prose h3, .prose h4 { position: relative; scroll-margin-top: 88px; }
.prose h2 {
  margin-top: 2.2em;
  font-size: 1.6rem;
  letter-spacing: -0.012em;
}
.prose h3 { margin-top: 1.8em; font-size: 1.25rem; }
.prose h4 { margin-top: 1.6em; font-size: 1.05rem; }
.prose h2 + *, .prose h3 + *, .prose h4 + * { margin-top: 0.6em; }

.anchor {
  margin-left: 0.4em;
  color: var(--accent);
  text-decoration: none;
  font-weight: 400;
  opacity: 0;
  transition: opacity 150ms ease;
}
.prose :is(h2, h3, h4):hover .anchor,
.anchor:focus-visible { opacity: 1; }
@media (hover: none) { .anchor { display: none; } }

.prose a { text-decoration-color: var(--accent); text-decoration-thickness: 1.5px; }
.prose strong { font-weight: 600; }
.prose ul, .prose ol { padding-left: 1.3em; }
.prose li + li { margin-top: 0.35em; }
.prose li::marker { color: var(--accent); }

.prose blockquote {
  margin-inline: 0;
  padding: 2px 0 2px 20px;
  border-left: 1px solid var(--accent);
  color: var(--muted);
}

.prose hr {
  margin-block: 2.4em;
  border: 0;
  border-top: 1px solid var(--line);
}

.prose :not(pre) > code {
  padding: 0.12em 0.36em;
  background: var(--surface);
  border-radius: 4px;
  font: 400 0.88em/1 var(--font-mono);
  overflow-wrap: anywhere;
}

/* Code listings */
.prose .highlight { position: relative; margin-top: 1.4em; }
.prose pre {
  margin: 0;
  padding: 18px 20px;
  overflow-x: auto;
  background: var(--code-bg);
  border-radius: var(--radius-s);
  font: 400 0.875rem/1.65 var(--font-mono);
  tab-size: 4;
  -webkit-text-size-adjust: none;
}
.prose pre code { font: inherit; }
.prose .highlight + *, .prose * + .highlight { margin-top: 1.4em; }

.code-copy {
  position: absolute;
  top: 8px;
  right: 8px;
  min-height: 32px;
  padding: 0 10px;
  border: 1px solid var(--control);
  border-radius: var(--radius-s);
  background: var(--code-bg);
  color: var(--muted);
  font: 400 0.75rem/1 var(--font-mono);
  cursor: pointer;
  opacity: 0;
  transition: opacity 150ms ease, transform 120ms var(--ease-out);
}
.code-copy:active { transform: scale(0.97); }
.highlight:hover .code-copy, .code-copy:focus-visible { opacity: 1; }
@media (hover: none) { .code-copy { opacity: 1; } }

/* Chroma token colours, tuned to the copper / ink palette */
:root {
  --code-bg: oklch(0.955 0.005 250);
  --tok-kw: oklch(0.42 0.13 265);
  --tok-type: oklch(0.45 0.1 200);
  --tok-str: oklch(0.45 0.11 145);
  --tok-num: oklch(0.5 0.13 45);
  --tok-com: oklch(0.52 0.01 250);
  --tok-pre: oklch(0.48 0.14 330);
  --tok-fn: oklch(0.3 0.02 250);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --code-bg: oklch(0.205 0.009 250);
    --tok-kw: oklch(0.78 0.1 265);
    --tok-type: oklch(0.8 0.08 200);
    --tok-str: oklch(0.8 0.1 145);
    --tok-num: oklch(0.78 0.11 55);
    --tok-com: oklch(0.65 0.01 250);
    --tok-pre: oklch(0.78 0.11 330);
    --tok-fn: oklch(0.95 0.01 250);
  }
}
.chroma .k, .chroma .kd, .chroma .kn, .chroma .kr, .chroma .kc { color: var(--tok-kw); }
.chroma .kt, .chroma .nc, .chroma .nb, .chroma .bp { color: var(--tok-type); }
.chroma .s, .chroma .s1, .chroma .s2, .chroma .sc, .chroma .sb, .chroma .se, .chroma .sh, .chroma .si, .chroma .sx, .chroma .cpf { color: var(--tok-str); }
.chroma .m, .chroma .mi, .chroma .mh, .chroma .mf, .chroma .mo, .chroma .mb, .chroma .il { color: var(--tok-num); }
.chroma .c, .chroma .c1, .chroma .cm, .chroma .cs, .chroma .ch { color: var(--tok-com); font-style: italic; }
.chroma .cp { color: var(--tok-pre); }
.chroma .nf, .chroma .fm { color: var(--tok-fn); font-weight: 500; }
.chroma .nl, .chroma .nv { color: var(--tok-fn); }
.chroma .err { color: inherit; background: none; }
.chroma .hl { display: block; background: var(--accent-soft); }

/* Numbered figures */
.fig { margin: 2em 0; counter-increment: fig; }
.fig img { display: block; max-width: 100%; height: auto; margin-inline: auto; border-radius: var(--radius-s); }
.fig figcaption {
  margin-top: 10px;
  color: var(--muted);
  font-size: 0.925rem;
  line-height: 1.55;
}
.fig figcaption::before {
  content: "Fig. " counter(fig) "  ";
  white-space: pre;
  font: 500 0.8125rem var(--font-mono);
  color: var(--ink);
}
.prose img { max-width: 100%; height: auto; }

/* Tables */
.prose table {
  display: block;
  width: max-content;
  max-width: 100%;
  overflow-x: auto;
  border-collapse: collapse;
  font-size: 0.975rem;
}
.prose th, .prose td {
  padding: 8px 16px 8px 0;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}
.prose th { font-weight: 600; border-bottom-color: var(--ink); }
.prose td { font-variant-numeric: tabular-nums; }

/* Footnotes */
.prose .footnotes {
  margin-top: 3em;
  padding-top: 8px;
  font-size: 0.95rem;
  color: var(--muted);
}
.prose .footnotes hr { margin: 0 0 1em; }
.prose .footnotes ol { padding-left: 1.3em; }
.prose sup a, .prose .footnote-ref {
  font: 500 0.75em/1 var(--font-mono);
  text-decoration: none;
  padding-inline: 1px;
}
.prose .footnote-backref { text-decoration: none; margin-left: 4px; }

/* End of article */
.post-foot {
  margin-top: clamp(48px, 7vw, 72px);
  padding-top: 24px;
  border-top: 1px solid var(--ink);
}
.post-nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}
.post-nav a {
  display: grid;
  gap: 2px;
  font-weight: 600;
  text-decoration: none;
}
.post-nav span { font: 400 0.8125rem var(--font-mono); color: var(--muted); }
.post-nav-next { grid-column: 2; text-align: right; }
.post-foot > p { margin-top: 24px; color: var(--muted); }
.post-foot > p a { text-decoration-color: var(--accent); }
@media (hover: hover) and (pointer: fine) {
  .post-nav a:hover { text-decoration: underline; text-decoration-color: var(--accent); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .trace-svg.pending .signal { stroke-dasharray: none; stroke-dashoffset: 0; }
  .btn:active, .copy:active { transform: none; }
  .toast, .toast.show { transform: translate(-50%, 0); }
}