/* Osama Raddad, set like an engineering journal.
   Source Serif 4 (display, standfirsts), Schibsted Grotesk (text) and
   Source Code Pro (listings). All SIL OFL, self-hosted, latin subset. */

@font-face {
  font-family: "Source Serif 4";
  src: url("fonts/source-serif-4-roman.woff2") format("woff2");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Source Serif 4";
  src: url("fonts/source-serif-4-italic.woff2") format("woff2");
  font-style: italic;
  font-weight: 400;
  font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Schibsted Grotesk";
  src: url("fonts/schibsted-grotesk.woff2") format("woff2");
  font-style: normal;
  font-weight: 400 900;
  font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Source Code Pro";
  src: url("fonts/source-code-pro.woff2") format("woff2");
  font-style: normal;
  font-weight: 400 600;
  font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

/* ---------- Tokens ---------- */

:root {
  color-scheme: light;
  --paper: #f4f2ee;      /* uncoated book paper */
  --plate: #fbfaf7;      /* listing plate, a brighter stock */
  --ink: #1b2230;        /* iron-blue ink */
  --ink-2: #4f5661;      /* secondary text */
  --rule: #d3cec4;       /* hairlines */
  --accent: #1d5c6e;     /* Kattegat */
  --sel: #cfe0e3;
  --edge: rgba(27, 34, 48, 0.14);
  /* Listings: one accent for keywords, one warm hue for literals, grey comments.
     Types and names stay in ink. Yellow is reserved for the project's own API. */
  --t-kw: #1d5c6e;
  --t-lit: #8a3b20;
  --t-com: #5f6670;
  --mark-bg: #f5dc76;
  --mark-ink: #1b2230;
  --mark-line: #8a6a00;

  --serif: "Source Serif 4", "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --sans: "Schibsted Grotesk", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --mono: "Source Code Pro", ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  --pad: 1.25rem;
  --sec-space: 5rem;
  --rh-h: 3rem;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --paper: #1f1d1a;
    --plate: #2a2824;
    --ink: #ece7de;
    --ink-2: #aaa499;
    --rule: #3c3934;
    --accent: #8cc3cf;
    --sel: #2f4a50;
    --edge: rgba(0, 0, 0, 0.5);
    --t-kw: #8cc3cf;
    --t-lit: #e3a08f;
    --t-com: #a39d92;
    --mark-bg: rgba(214, 178, 76, 0.16);
    --mark-ink: #f2dd9b;
    --mark-line: #c9a443;
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --paper: #1f1d1a;
  --plate: #2a2824;
  --ink: #ece7de;
  --ink-2: #aaa499;
  --rule: #3c3934;
  --accent: #8cc3cf;
  --sel: #2f4a50;
  --edge: rgba(0, 0, 0, 0.5);
  --t-kw: #8cc3cf;
  --t-lit: #e3a08f;
  --t-com: #a39d92;
  --mark-bg: rgba(214, 178, 76, 0.16);
  --mark-ink: #f2dd9b;
  --mark-line: #c9a443;
}

/* ---------- Base ---------- */

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  /* Keeps focused and linked-to elements clear of the sticky running head.
     site.js replaces this with the head's measured height + 0.75rem. */
  scroll-padding-top: calc(var(--rh-h) + 0.75rem);
}
@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.65;
  font-kerning: normal;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 400;
  text-wrap: balance;
  overflow-wrap: break-word;
}
p, ul, ol, dl, dd, figure { margin: 0; }
ul, ol { padding: 0; list-style: none; }
p { text-wrap: pretty; }

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

a {
  color: inherit;
  text-decoration-line: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.22em;
  text-decoration-color: var(--accent);
}
a:hover { color: var(--accent); text-decoration-thickness: 2px; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}
pre:focus-visible { outline-offset: 0; }

strong { font-weight: 600; }

code {
  font-family: var(--mono);
  font-size: 0.9em;
}
/* Inline code stays on one line, so a call never loses its braces to the
   next line. The few long ones are marked .wrap and break at <wbr>. */
:not(pre) > code {
  color: var(--ink);
  white-space: nowrap;
}

/* With html's scroll-padding, an anchor lands 1.25rem below the running head. */
[id] { scroll-margin-top: 0.5rem; }

.vh {
  position: absolute !important;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.skip {
  position: absolute;
  left: var(--pad);
  top: -10rem;
  z-index: 20;
  padding: 0.6rem 1rem;
  background: var(--ink);
  color: var(--paper);
  font-weight: 600;
  text-decoration: none;
}
.skip:focus { top: 1rem; }

/* ---------- Page grid ----------
   rail  : section numbers, dates, labels (hanging)
   main  : the text measure
   aside : marginal facts (desktop only; folds into main below 70rem) */

.grid {
  display: grid;
  grid-template-columns:
    [full-start] var(--pad)
    [rail-start main-start aside-start] minmax(0, 1fr)
    [rail-end main-end aside-end] var(--pad)
    [full-end];
}
@media (min-width: 48rem) {
  :root { --pad: 2rem; --sec-space: 6rem; }
  .grid {
    grid-template-columns:
      [full-start] minmax(var(--pad), 1fr)
      [rail-start] 6.5rem
      [rail-end main-start aside-start] minmax(0, 40rem)
      [main-end aside-end] minmax(var(--pad), 1fr)
      [full-end];
  }
}
@media (min-width: 70rem) {
  :root { --pad: 2.5rem; --sec-space: 7rem; }
  .grid {
    grid-template-columns:
      [full-start] minmax(var(--pad), 1fr)
      [rail-start] 7rem
      [rail-end main-start] minmax(0, 38rem)
      [main-end] 4.5rem
      [aside-start] 17rem
      [aside-end] minmax(var(--pad), 1fr)
      [full-end];
  }
}

/* ---------- Masthead ---------- */

.masthead { padding-top: 1rem; }
.masthead > * { grid-column: main; }

.theme-slot {
  grid-column: rail-start / aside-end;
  grid-row: 1;
  justify-self: end;
  /* The switch: 2.25rem buttons inside a 1px frame. */
  min-height: calc(2.25rem + 2px);
}

.name {
  grid-column: rail-start / main-end;
  margin-top: clamp(1.75rem, 4vw, 3rem);
  margin-left: -0.04em;
  font-size: clamp(4.25rem, 21vw, 10.5rem);
  line-height: 0.88;
  letter-spacing: -0.028em;
}
.name span { display: block; }

.role {
  margin-top: 1.6rem;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  column-gap: 1rem;
  row-gap: 0.1rem;
}
.role-a {
  font-size: clamp(1.375rem, 2.3vw, 1.875rem);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.01em;
}
/* Always its own line, so the role line wraps the same way in the fallback
   font and in Schibsted Grotesk (no shift when the web font swaps in). */
.role-b {
  flex-basis: 100%;
  font-size: clamp(1rem, 1.4vw, 1.125rem);
  color: var(--ink-2);
}

.positioning {
  margin-top: 0.85rem;
  font-family: var(--serif);
  font-size: clamp(1.25rem, 2.1vw, 1.625rem);
  line-height: 1.34;
  max-width: 36rem;
}

.cta {
  margin-top: 1.6rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1.75rem;
}
.cta-primary {
  display: inline-block;
  padding: 0.8rem 1.35rem;
  background: var(--ink);
  color: var(--paper);
  font-weight: 600;
  text-decoration: none;
}
.cta-primary:hover { background: var(--accent); color: var(--paper); }
.cta-secondary { font-weight: 600; padding-block: 0.8rem; }

/* Quick facts: the two figures carry the level, set as lining tabular serif numerals. */
.quick-facts {
  margin-top: 2.25rem;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}
.qf {
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  padding: 0.75rem 1rem 0.8rem 0;
}
.qf + .qf { padding-left: 1rem; border-left: 1px solid var(--rule); }
.qf-fig {
  order: -1;
  font-family: var(--serif);
  font-size: clamp(2.25rem, 4vw, 3rem);
  line-height: 1.05;
  letter-spacing: -0.01em;
  font-variant-numeric: lining-nums tabular-nums;
}
.qf-cap {
  margin-top: 0.15rem;
  font-size: 0.9375rem;
  line-height: 1.35;
  color: var(--ink-2);
}
.qf--wide { grid-column: 1 / -1; }
.star {
  font-size: 0.6em;
  vertical-align: 0.42em;
  margin-left: 0.06em;
}
.qf--wide.qf { padding-left: 0; border-left: 0; border-top: 1px solid var(--rule); }
.qf--wide .qf-fig { font-size: clamp(1.5rem, 3vw, 2.25rem); }

/* Contents */
.toc { margin-top: 2.75rem; }
.toc-label {
  padding-bottom: 0.45rem;
  border-bottom: 1px solid var(--ink);
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.125rem;
  color: var(--ink-2);
}
.toc > ol { margin-top: 0.5rem; }
.toc a {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  padding-block: 0.28rem;
  text-decoration: none;
  font-family: var(--serif);
  font-size: 1.1875rem;
  line-height: 1.35;
}
.toc a:hover .toc-t { text-decoration: underline; text-decoration-thickness: 1px; text-decoration-color: var(--accent); }
.toc-n {
  flex: none;
  min-width: 2.4rem;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}
.toc-sub {
  padding-left: 2.9rem;
  margin-bottom: 0.25rem;
}
.toc-sub a {
  gap: 0.6rem;
  padding-block: 0.2rem;
  font-family: var(--mono);
  font-size: 0.875rem;
  color: var(--ink-2);
}
.toc-sub a:hover { color: var(--accent); }
.toc-sub .toc-n {
  min-width: 1.75rem;
  font-family: var(--sans);
  color: var(--ink-2);
}

@media (min-width: 30rem) {
  .quick-facts { grid-template-columns: auto auto minmax(0, 1fr); }
  .qf { padding-right: 1.5rem; }
  .qf + .qf { padding-left: 1.5rem; }
  .qf--wide { grid-column: auto; }
  .qf--wide.qf { padding-left: 1.5rem; border-left: 1px solid var(--rule); border-top: 0; }
}

@media (min-width: 48rem) {
  .masthead { padding-top: 1.25rem; }
  .quick-facts { grid-column: rail-start / aside-end; margin-top: 3rem; }
  .qf { padding: 0.8rem 2.25rem 0.85rem 0; }
  .qf + .qf { padding-left: 2.25rem; }
  .qf--wide.qf { padding-left: 2.25rem; }
  .qf--wide .qf-fig { font-size: clamp(1.75rem, 3.2vw, 3rem); }
}

@media (min-width: 70rem) {
  .masthead > .name { grid-row: 2; }
  .masthead > .role { grid-row: 3; }
  .masthead > .positioning { grid-row: 4; }
  .masthead > .cta { grid-row: 5; }
  .masthead > .quick-facts { grid-row: 6; margin-top: 2.5rem; }
  .toc {
    grid-column: aside;
    grid-row: 2 / span 4;
    align-self: start;
    margin-top: clamp(1.75rem, 4vw, 3rem);
    padding-top: 0.4rem;
  }
}

/* ---------- Running head ----------
   In flow under the masthead, then sticks to the top while reading. */

.runhead {
  position: sticky;
  top: 0;
  z-index: 10;
  margin-top: 3.5rem;
  background: var(--paper);
  border-bottom: 1px solid var(--rule);
}
.runhead-in {
  grid-column: rail-start / aside-end;
  display: flex;
  align-items: center;
  gap: 1rem;
  min-height: var(--rh-h);
  font-size: 0.875rem;
  line-height: 1.3;
}
.rh-name {
  flex: none;
  font-family: var(--serif);
  font-size: 1.125rem;
  text-decoration: none;
  padding-block: 0.4rem;
}
.rh-links { display: none; }
.rh-here {
  flex: 1 1 auto;
  min-width: 0;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  color: var(--ink-2);
}
.rh-here .rh-n { color: var(--accent); margin-right: 0.4rem; font-variant-numeric: tabular-nums; }
.rh-toc {
  flex: none;
  margin-left: auto;
  padding-block: 0.4rem;
  font-weight: 500;
}

@media (min-width: 64rem) {
  .rh-links {
    display: flex;
    flex-wrap: nowrap;
    gap: 0.25rem 1.25rem;
    margin-left: 0.75rem;
  }
  .rh-links a {
    display: inline-block;
    padding-block: 0.45rem;
    text-decoration: none;
    white-space: nowrap;
  }
  .rh-links a:hover { text-decoration: underline; text-decoration-color: var(--accent); }
  .rh-links a[aria-current] {
    text-decoration: underline;
    text-decoration-thickness: 2px;
    text-decoration-color: var(--accent);
    text-underline-offset: 0.4em;
  }
  /* A plain space follows the number, so one underline runs under "1 About". */
  .rh-links .rh-n { color: var(--accent); font-variant-numeric: tabular-nums; }
  .rh-here { flex: 0 1 auto; margin-left: auto; text-align: right; }
  .rh-here:not([data-depth="2"]) { visibility: hidden; }
  .rh-toc { margin-left: 0; }
  .rh-here[hidden] + .rh-toc,
  .rh-here:not([data-depth="2"]) + .rh-toc { margin-left: auto; }
}
/* 64-70rem: the six links fill the 46.5rem head, so the project label waits for 70rem. */
@media (min-width: 64rem) and (max-width: 69.99rem) {
  .rh-links { gap: 0.25rem 0.9rem; margin-left: 0.5rem; }
  .rh-here { display: none; }
  .rh-here + .rh-toc { margin-left: auto; }
}
/* Below 360px there is no room for a readable label beside the name. */
@media (max-width: 22.49rem) {
  .rh-here { display: none; }
}

/* ---------- Sections ---------- */

.sec { padding-top: var(--sec-space); }
.sec > * { grid-column: main; }

.sec-h {
  grid-column: rail-start / aside-end;
  padding-top: 1.1rem;
  border-top: 1px solid var(--ink);
  font-size: clamp(2.25rem, 5.5vw, 3.5rem);
  line-height: 1.05;
  letter-spacing: -0.012em;
}
.sec-h .num {
  margin-right: 0.22em; /* plus the space before the title */
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

.sec-intro {
  margin-top: 1.5rem;
  font-family: var(--serif);
  font-size: clamp(1.25rem, 2.4vw, 1.625rem);
  line-height: 1.35;
  max-width: 40ch;
  text-wrap: balance;
}

.prose p + p,
.prose p + ul,
.prose ul + p { margin-top: 1rem; }

@media (min-width: 48rem) {
  .sec-h {
    display: grid;
    grid-template-columns: subgrid;
    align-items: baseline;
  }
  .sec-h .num { grid-column: rail; margin: 0; }
  .sec-h .t { grid-column: main / aside-end; }
}

/* About */

.runhead + main > #about { padding-top: calc(var(--sec-space) * 0.6); }

.about-text { margin-top: 2.25rem; }
.about-text p:first-child {
  font-size: 1.1875rem;
  line-height: 1.6;
}
.about-notes {
  margin-top: 2.5rem;
  padding-top: 0.9rem;
  border-top: 1px solid var(--rule);
  font-size: 0.9375rem;
  line-height: 1.55;
}
.note-h {
  font-size: 1.125rem;
  font-style: italic;
  color: var(--ink-2);
}
.note-list { margin-top: 0.4rem; }
.note-list li + li { margin-top: 0.6rem; }
.note { margin-top: 1rem; }

@media (min-width: 70rem) {
  .about-text { grid-row: 2; }
  .about-notes {
    grid-column: aside;
    grid-row: 2;
    align-self: start;
    margin-top: 2.25rem;
  }
}

/* Key to the listings */
.key {
  margin-top: 1.25rem;
  font-size: 0.9375rem;
  color: var(--ink-2);
}
.key mark.api { font-family: var(--mono); font-size: 0.9em; }

/* ---------- Projects (articles) ---------- */

.project, .archive {
  grid-column: rail-start / aside-end;
  display: grid;
  grid-template-columns: subgrid;
  align-content: start;
  margin-top: 3rem;
  padding-top: 2.75rem;
  border-top: 1px solid var(--rule);
}
@media (min-width: 48rem) {
  .project, .archive { margin-top: 4rem; padding-top: 3.5rem; }
}
.key + .project {
  margin-top: 2.5rem;
  padding-top: 0;
  border-top: 0;
}
.project > *, .archive > * { grid-column: main; }

.kicker {
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  color: var(--accent);
  text-wrap: balance;
}

.proj-h {
  margin-top: 0.4rem;
  font-size: clamp(2.125rem, 5vw, 3rem);
  line-height: 1.04;
  letter-spacing: -0.012em;
}
.flagship .proj-h { font-size: clamp(2.375rem, 6vw, 3.625rem); }
.proj-h .num {
  margin-right: 0; /* the space before the title is the gap */
  font-size: 1.25rem;
  letter-spacing: 0;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}
.archive .proj-h { margin-top: 0; }

.tagline {
  margin-top: 0.9rem;
  font-family: var(--serif);
  font-style: italic;
  font-size: clamp(1.25rem, 2.3vw, 1.5rem);
  line-height: 1.35;
  max-width: 36ch;
  text-wrap: balance;
}

@media (min-width: 48rem) {
  .proj-h {
    grid-column: rail-start / main-end;
    display: grid;
    grid-template-columns: subgrid;
    align-items: baseline;
  }
  .proj-h .num { grid-column: rail; margin: 0; }
  .proj-h .t { grid-column: main; }
}

/* Status: shape carries the state as well as the words.
   ● released   ○ on master   ◐ pre-release   ◇ proof of concept */

.status { margin-top: 1.4rem; }
.status-k {
  font-size: 0.8125rem;
  color: var(--ink-2);
  margin-bottom: 0.35rem;
}
.stamps {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.stamp,
.flag {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  border: 1px solid var(--accent);
  color: var(--accent);
  font-weight: 500;
}
.stamp {
  padding: 0.28rem 0.6rem 0.3rem 0.55rem;
  font-size: 0.875rem;
  line-height: 1.35;
}
.stamp::before,
.flag::before {
  content: "";
  flex: none;
  width: 0.62em;
  height: 0.62em;
  border: 1.5px solid currentColor;
  border-radius: 50%;
}
.stamp--released::before { background: currentColor; }
.stamp--master,
.flag { border-style: dashed; }
.stamp--pre { border-style: dashed; }
.stamp--pre::before,
.flag--pre::before { background: linear-gradient(90deg, currentColor 50%, transparent 50%); }
.stamp--poc { border-style: dotted; border-width: 1.5px; }
.stamp--poc::before { border-radius: 1px; transform: rotate(45deg) scale(0.86); }

/* Forced colours drop author backgrounds; paint the fills in system colours. */
@media (forced-colors: active) {
  .stamp--released::before { forced-color-adjust: none; color: CanvasText; background: CanvasText; }
  .stamp--pre::before,
  .flag--pre::before {
    forced-color-adjust: none;
    color: CanvasText;
    background: linear-gradient(90deg, CanvasText 50%, Canvas 50%);
  }
}

.flag {
  padding: 0 0.45em 0 0.4em;
  font-size: 0.84em;
  line-height: 1.5;
  white-space: nowrap;
  vertical-align: 0.06em;
}

@media (min-width: 70rem) {
  .project > .kicker { grid-row: 1; }
  .project > .proj-h { grid-row: 2; }
  .project > .tagline { grid-row: 3; }
  .project > .proj-body { grid-row: 4; }
  .project > .figures { grid-row: 5; }
  /* The margin carries status and facts together; the copy under the title is for narrow screens. */
  .project > .status { display: none; }
  .project > .meta {
    grid-column: aside;
    grid-row: 1 / span 4;
    align-self: start;
  }
}

/* Marginal facts */

.meta {
  margin-top: 2.5rem;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  column-gap: 1.5rem;
  border-top: 1px solid var(--ink);
  font-size: 0.9375rem;
  line-height: 1.5;
}
.meta > div {
  padding-block: 0.65rem 0.75rem;
  border-bottom: 1px solid var(--rule);
}
.meta .meta-links, .meta .meta-tags { grid-column: 1 / -1; }
.meta .meta-status { display: none; }
.meta .stamps { margin-top: 0.15rem; }
.meta dt {
  font-size: 0.8125rem;
  color: var(--ink-2);
  margin-bottom: 0.2rem;
}
.meta .years {
  font-family: var(--serif);
  font-size: 1.375rem;
  line-height: 1.2;
  font-variant-numeric: lining-nums tabular-nums;
}
.meta .years-note {
  display: block;
  margin-top: 0.15rem;
  font-family: var(--sans);
  font-size: 0.875rem;
  color: var(--ink-2);
  font-variant-numeric: normal;
}
.tags li { display: inline; }
.tags li + li::before { content: ", "; }
.links li + li { margin-top: 0.3rem; }

@media (min-width: 30rem) {
  .meta { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .meta .meta-tags { grid-column: auto; }
}
/* Below 70rem the facts close the article and the next project's top rule
   follows; the last row drops its own rules so the two don't double up. */
@media (max-width: 69.99rem) {
  .meta > div:last-child { border-bottom: 0; }
}
@media (min-width: 30rem) and (max-width: 69.99rem) {
  .meta > div:has(~ .meta-tags:last-child) { border-bottom: 0; }
}
@media (min-width: 70rem) {
  .meta {
    display: block;
    margin-top: 0.3rem;
  }
  .meta .meta-status { display: block; padding-bottom: 0.9rem; }
}

/* Article body */

.proj-body { margin-top: 1.75rem; }
@media (min-width: 70rem) { .proj-body { margin-top: 2.25rem; } }

.highlights {
  margin-top: 1.5rem;
  border-top: 1px solid var(--rule);
}
.highlights li,
.entry-list li {
  position: relative;
  padding: 0.7rem 0 0.75rem 1.5rem;
  border-bottom: 1px solid var(--rule);
}
.highlights li::before,
.entry-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1.55rem;
  width: 0.6rem;
  height: 1px;
  background: var(--accent);
}
.install-line { margin-top: 1.25rem; }
.nowrap { white-space: nowrap; }
code.wrap { white-space: normal; overflow-wrap: anywhere; }

/* ---------- Listings ----------
   Head (number, honesty label, language, copy) sits above the code,
   so the caveat is read before the snippet. */

.figures {
  grid-column: main-start / aside-end;
  margin-top: 2.5rem;
  display: grid;
  row-gap: 2.5rem;
}
.listing { min-width: 0; }
.lst-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  column-gap: 0.6rem;
  row-gap: 0.2rem;
  padding-block: 0.55rem 0.6rem;
  border-top: 1px solid var(--ink);
  font-size: 0.875rem;
  line-height: 1.4;
}
.lst-n { font-weight: 600; color: var(--accent); white-space: nowrap; }
.lst-label { font-weight: 500; color: var(--ink); }
.lst-tools {
  margin-left: auto;
  display: inline-flex;
  align-items: baseline;
  gap: 0.85rem;
  padding-left: 0.5rem;
}
.lst-lang {
  font-family: var(--mono);
  font-size: 0.8125rem;
  color: var(--ink-2);
}
.listing pre {
  margin: 0;
  padding: 1.15rem 1.5rem 1.25rem;
  overflow-x: auto;
  background:
    linear-gradient(to right, var(--plate) 40%, transparent) left / 2.5rem 100% no-repeat local,
    linear-gradient(to left, var(--plate) 40%, transparent) right / 2.5rem 100% no-repeat local,
    linear-gradient(to right, var(--edge), transparent) left / 0.9rem 100% no-repeat scroll,
    linear-gradient(to left, var(--edge), transparent) right / 0.9rem 100% no-repeat scroll,
    var(--plate);
  box-shadow: inset 0 0 0 1px var(--rule);
  font-family: var(--mono);
  font-size: 0.875rem;
  line-height: 1.62;
  tab-size: 4;
  color: var(--ink);
  font-variant-ligatures: none;
}
.listing pre code { font-size: inherit; }
.lst-cap {
  margin-top: 0.65rem;
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--ink-2);
  max-width: 44rem;
}

.copy {
  align-self: center;
  padding: 0.3rem 0.7rem;
  min-height: 1.9rem;
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--rule);
  font: 500 0.8125rem/1.3 var(--sans);
  cursor: pointer;
}
.copy:hover { border-color: var(--ink); }

/* Static syntax tokens */
.tk { color: var(--t-kw); font-weight: 600; }
.ts { color: var(--t-lit); }
.tc { color: var(--t-com); }
.tn { font-style: italic; }
.ta { color: var(--t-kw); }

/* The project's own API: a highlighter pass in light, a tint in dark, and an
   amber underscore in both, so the cue doesn't rest on hue alone. */
mark.api {
  color: var(--mark-ink);
  background: var(--mark-bg);
  border-radius: 2px;
  box-shadow: 0 0 0 1px var(--mark-bg);
  text-decoration-line: underline;
  text-decoration-color: var(--mark-line);
  text-decoration-thickness: 0.14em;
  text-underline-offset: 0.28em;
  text-decoration-skip-ink: none;
}
mark.api .ta, mark.api .tn { color: inherit; }
@media (forced-colors: active) {
  /* Forced colours keep the translucent dark tint behind MarkText; use solid Mark. */
  mark.api {
    forced-color-adjust: none;
    background: Mark;
    color: MarkText;
    box-shadow: none;
    text-decoration-color: MarkText;
  }
}

/* Tablet: listings take the rail as well, so long lines scroll less. */
@media (min-width: 48rem) and (max-width: 69.99rem) {
  .figures { grid-column: rail-start / aside-end; }
}

@media (min-width: 70rem) {
  .figures {
    grid-column: rail-start / aside-end;
    grid-template-columns: subgrid;
  }
  .figures > .listing { grid-column: main-start / aside-end; }
  .figures > .listing.wide { grid-column: rail-start / aside-end; }
  .listing.wide pre { font-size: 0.8125rem; padding-inline: 1.25rem; }

  /* Install block: code in the text column, its note in the margin beside it. */
  .figures > .listing.install {
    display: grid;
    grid-template-columns: subgrid;
    align-items: start;
  }
  .listing.install > .lst-head,
  .listing.install > pre { grid-column: main; }
  .listing.install > .lst-cap {
    grid-column: aside;
    grid-row: 2;
    margin-top: 0;
    padding-top: 0.15rem;
  }
}

@media (max-width: 47.99rem) {
  .lst-label { order: 3; flex-basis: 100%; }
}
/* Phones: listings run edge to edge, and their text lines up with the column.
   The article is a subgrid of the text column, so the bleed is a negative margin. */
@media screen and (max-width: 47.99rem) {
  .figures { margin-inline: calc(-1 * var(--pad)); }
  .lst-head, .lst-cap { padding-inline: var(--pad); }
  .listing pre {
    padding-inline: var(--pad);
    font-size: 0.8125rem;
    box-shadow: inset 0 1px 0 var(--rule), inset 0 -1px 0 var(--rule);
  }
}

/* Older work */

.archive-list { margin-top: 1.75rem; }
.archive-list li {
  padding-block: 0.85rem;
  border-top: 1px solid var(--rule);
}
.archive-list li:last-child { border-bottom: 1px solid var(--rule); }
.archive-list a {
  font-family: var(--serif);
  font-size: 1.3125rem;
}
.archive-list .yr { color: var(--ink-2); font-variant-numeric: tabular-nums; }

/* ---------- Experience ---------- */

.timeline {
  grid-column: rail-start / aside-end;
  display: grid;
  grid-template-columns: subgrid;
  margin-top: 2.5rem;
}
.entry {
  grid-column: rail-start / aside-end;
  display: grid;
  grid-template-columns: subgrid;
  align-content: start;
  padding-block: 1.4rem 1.6rem;
  border-top: 1px solid var(--rule);
}
.entry > * { grid-column: main; }
.entry-h {
  font-size: clamp(1.5rem, 3vw, 1.875rem);
  line-height: 1.2;
}
.entry-h .when {
  display: block;
  margin-bottom: 0.3rem;
  font-family: var(--sans);
  font-size: 0.9375rem;
  line-height: 1.4;
  color: var(--ink-2);
  font-variant-numeric: tabular-nums;
}
.entry-body { margin-top: 0.75rem; }
.entry-role { color: var(--ink-2); font-size: 0.9375rem; }
.entry-list { border-top: 1px solid var(--rule); margin-top: 0.75rem; }
.entry-list li:last-child { border-bottom: 0; }
.entry-link { font-weight: 500; }

@media (min-width: 48rem) {
  .entry-h {
    grid-column: rail-start / main-end;
    display: grid;
    grid-template-columns: subgrid;
    align-items: baseline;
  }
  .entry-h .when { grid-column: rail; margin: 0; }
  .entry-h .what { grid-column: main; }
}

/* ---------- Writing ---------- */

.writing {
  grid-column: rail-start / aside-end;
  display: grid;
  grid-template-columns: subgrid;
  margin-top: 2.5rem;
}
.piece {
  grid-column: rail-start / aside-end;
  display: grid;
  grid-template-columns: subgrid;
  padding-block: 1.2rem 1.35rem;
  border-top: 1px solid var(--rule);
}
.piece > * { grid-column: main; }
.piece-meta {
  font-size: 0.875rem;
  line-height: 1.45;
  color: var(--ink-2);
  font-variant-numeric: tabular-nums;
}
.piece-meta .pub { margin-left: 0.75rem; }
.piece-title {
  margin-top: 0.25rem;
  font-family: var(--serif);
  font-size: clamp(1.25rem, 2.2vw, 1.4375rem);
  line-height: 1.25;
}
.piece-sum {
  margin-top: 0.4rem;
  font-size: 0.96875rem;
  line-height: 1.55;
  color: var(--ink-2);
}
.more { margin-top: 1.75rem; font-weight: 600; }

@media (min-width: 48rem) {
  .piece-meta { grid-column: rail; padding-top: 0.3rem; }
  .piece-meta .pub { display: block; margin-left: 0; }
  .piece-title { margin-top: 0; }
}

/* ---------- Community ---------- */

.community {
  grid-column: main-start / aside-end;
  margin-top: 2.25rem;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 19rem), 1fr));
  column-gap: 3rem;
}
.community li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  padding-block: 0.8rem;
  border-top: 1px solid var(--rule);
}
.community .what { text-wrap: balance; }
.community .when {
  flex: none;
  color: var(--ink-2);
  font-size: 0.9375rem;
  font-variant-numeric: tabular-nums;
}

/* ---------- Contact ---------- */

.contact {
  grid-column: rail-start / aside-end;
  display: grid;
  grid-template-columns: subgrid;
  margin-top: 2.5rem;
}
.contact li {
  grid-column: rail-start / aside-end;
  display: grid;
  grid-template-columns: subgrid;
  align-items: baseline;
  padding-block: 0.85rem 0.95rem;
  border-top: 1px solid var(--rule);
}
.contact li:last-child { border-bottom: 1px solid var(--rule); }
.contact-k {
  grid-column: main;
  font-size: 0.875rem;
  color: var(--ink-2);
}
.contact li a {
  grid-column: main / aside-end;
  font-family: var(--serif);
  font-size: clamp(1.25rem, 3vw, 1.625rem);
  line-height: 1.25;
  overflow-wrap: break-word;
}
/* One line from about 310px wide. Narrower, or with a large default font,
   it breaks at the <wbr> before "@gmail.com" rather than mid-domain. */
.contact .contact-email a { font-size: clamp(1.3125rem, 6.2vw, 3rem); line-height: 1.1; }

@media (min-width: 48rem) {
  .contact-k { grid-column: rail; }
}

/* ---------- Footer ---------- */

.colophon {
  margin-top: var(--sec-space);
  padding-bottom: 3rem;
}
.colophon-inner {
  grid-column: rail-start / aside-end;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 2.5rem;
  padding-top: 1.1rem;
  border-top: 1px solid var(--ink);
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--ink-2);
}
.colophon .about-page { flex-basis: 100%; max-width: 46rem; text-wrap: balance; }
@media (min-width: 70rem) {
  .colophon .about-page { flex-basis: auto; margin-left: auto; max-width: 30rem; text-align: right; }
}

/* ---------- Theme switch (added by site.js) ---------- */

.theme-switch {
  display: inline-flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  align-items: center;
  gap: 0.35rem 0.6rem;
  font: 500 0.8125rem/1.3 var(--sans);
}
.theme-k { color: var(--ink-2); }
.theme-opts {
  display: inline-flex;
  border: 1px solid var(--rule);
}
.theme-opts button {
  min-height: 2.25rem;
  padding: 0.4rem 0.7rem;
  background: transparent;
  color: var(--ink);
  border: 0;
  font: inherit;
  cursor: pointer;
}
.theme-opts button + button { border-left: 1px solid var(--rule); }
.theme-opts button:hover { color: var(--accent); }
.theme-opts button[aria-checked="true"] {
  background: var(--ink);
  color: var(--paper);
}
.theme-opts button:focus-visible { outline-offset: 2px; position: relative; }
@media (forced-colors: active) {
  /* Forced colours reset the inverted fill; mark the choice with Highlight. */
  .theme-opts button[aria-checked="true"] {
    forced-color-adjust: none;
    background: Highlight;
    color: HighlightText;
  }
}

/* ---------- 404 ---------- */

.lost { padding-bottom: 4rem; }
.lost > * { grid-column: main; }
.lost .name { grid-column: rail-start / main-end; }
.lost-text {
  margin-top: 1.75rem;
  font-family: var(--serif);
  font-size: clamp(1.25rem, 2.4vw, 1.625rem);
  line-height: 1.35;
}
.lost .cta { margin-top: 2rem; }
/* Home link and theme switch share a row; on narrow phones the switch wraps under. */
.lost-bar {
  grid-column: rail-start / aside-end;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem 1rem;
}
.lost-bar .theme-slot { margin-left: auto; }
.lost-home {
  font-family: var(--serif);
  font-size: 1.125rem;
  text-decoration: none;
}

/* ---------- Very narrow: under 20em ----------
   Below 320px, or a phone with a large default font size (rem queries scale
   with it). Let the few fixed-width pieces wrap instead of overflowing. */

@media screen and (max-width: 19.99rem) {
  :not(pre) > code { white-space: normal; overflow-wrap: anywhere; }
  .nowrap { white-space: normal; }
  .toc-sub { padding-left: 1rem; }
  .toc-t { min-width: 0; overflow-wrap: anywhere; }
  .meta { grid-template-columns: minmax(0, 1fr); }
  .qf-cap { overflow-wrap: anywhere; }
  .name { font-size: clamp(2.5rem, 20vw, 4.25rem); }
  .theme-slot { justify-self: start; }
  .theme-switch { justify-content: flex-start; }
  /* The head may wrap to two rows here. Without site.js to measure it,
     allow for both rows. */
  html { scroll-padding-top: calc(2 * var(--rh-h) + 0.75rem); }
  .runhead-in { flex-wrap: wrap; gap: 0 0.75rem; }
  .community li { flex-wrap: wrap; }
  .flag { white-space: normal; }
}

/* ---------- Print ---------- */

@media print {
  /* Paper is light whatever the screen theme: restate the light tokens over both dark rules. */
  :root,
  :root:not([data-theme="light"]),
  :root[data-theme="dark"] {
    color-scheme: light;
    --paper: #fff;
    --plate: #fff;
    --ink: #1b2230;
    --ink-2: #4f5661;
    --rule: #d3cec4;
    --accent: #1d5c6e;
    --sel: #cfe0e3;
    --edge: transparent;
    --t-kw: #1d5c6e;
    --t-lit: #8a3b20;
    --t-com: #5f6670;
    --mark-bg: transparent;
    --mark-ink: #1b2230;
    --mark-line: currentColor;
    --sec-space: 3rem;
  }
  body { background: #fff; color: var(--ink); }

  /* One column in plain block flow: grid rows split badly across pages. */
  .grid, .project, .archive, .figures, .timeline, .entry, .writing, .piece,
  .contact, .contact li, .sec-h, .proj-h, .entry-h, .listing.install { display: block; }
  .contact-k { display: block; }
  /* After the line above: .runhead is also a .grid. */
  .theme-slot, .copy, .skip, .cta, .runhead { display: none; }
  .figures > .listing + .listing { margin-top: 2rem; }
  .listing.install > .lst-cap { margin-top: 0.65rem; padding-top: 0; }
  .listing pre {
    white-space: pre-wrap;
    overflow-wrap: anywhere;
    background: none;
    box-shadow: none;
    border: 1px solid var(--rule);
  }
  mark.api { background: none; box-shadow: none; text-decoration-color: currentColor; }

  /* Keep things whole, and headings with what follows them. The heading lines
     are break-inside: avoid too: otherwise Chrome prefers splitting a tagline
     to breaking cleanly before the article. */
  .listing, .meta > div, .entry, .piece, .community li, .contact li, .highlights li,
  .entry-list li, .archive-list li, .quick-facts, .toc, .status, .install-line, .colophon,
  .kicker, .proj-h, .sec-h, .tagline, .sec-intro {
    break-inside: avoid;
  }
  h1, h2, h3, .kicker, .tagline, .sec-intro, .lst-head, .status-k, .piece-meta { break-after: avoid; }
  .tagline + .status { break-before: avoid; }

  /* On paper a link has to show where it goes. */
  .proj-body a[href^="http"]::after,
  .meta .links a::after,
  .archive-list a::after,
  .piece-title a::after,
  .more a::after,
  .about-notes a::after {
    content: " (" attr(href) ")";
    font-family: var(--sans);
    font-size: 0.8em;
    color: var(--ink-2);
    overflow-wrap: anywhere;
  }

  /* Status shapes and list dashes are drawn with backgrounds. */
  .stamp::before, .flag::before, .highlights li::before, .entry-list li::before {
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }

  .colophon { margin-top: 2rem; padding-bottom: 0; }
}