@charset "utf-8";

/* ==========================================================================
   Oliver's Lab — single stylesheet
   A work record, not a magazine. Four patterns only:
   record (a item of work in a numbered column), spec (data table),
   fig (plate + numbered caption), list (one-line rows).
   Two supporting rows — caps (label + paragraph) and faq (question + answer)
   — use the same grid and rules as spec. No framework, no build step.
   ========================================================================== */

/* Self-hosted typeface. Latin subset, variable weight 200–600.
   Newsreader by Production Type — SIL Open Font License 1.1. */
@font-face {
  font-family: "Newsreader";
  src: url("/assets/fonts/newsreader-roman.woff2") format("woff2");
  font-weight: 200 600;
  font-style: normal;
  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: "Newsreader";
  src: url("/assets/fonts/newsreader-italic.woff2") format("woff2");
  font-weight: 200 600;
  font-style: italic;
  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;
}

:root {
  color-scheme: light;

  /* Paper, ink, and one annotation colour. Nothing else. */
  --paper: #f2f0e9;
  --paper-2: #e8e4d7;
  --ink: #17181a;
  --ink-2: #4e5154;
  --ink-3: #63666a;
  --rule: #d5d1c3;
  --rule-2: #b2ad9c;
  --mark: #9b3a25;

  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --serif: "Newsreader", "Iowan Old Style", "Palatino Linotype", Palatino,
    Georgia, "Songti SC", serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
    "Liberation Mono", monospace;

  --page: 1064px;
  --gutter: clamp(20px, 5vw, 60px);
  --num: 56px;
  --measure: 66ch;
}

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

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection {
  background: #ddd8c6;
  color: var(--ink);
}

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

a {
  color: inherit;
  text-decoration: none;
}

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

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

h1,
h2,
h3 {
  font-family: var(--serif);
  font-weight: 400;
  font-variation-settings: "opsz" 40;
  letter-spacing: -0.018em;
  text-wrap: balance;
  margin: 0;
}

p {
  margin: 0 0 1.2em;
  text-wrap: pretty;
}

p:last-child {
  margin-bottom: 0;
}

strong {
  font-weight: 600;
}

em {
  font-style: italic;
}

.small {
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--ink-2);
  max-width: 58ch;
}

.mono {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.02em;
  color: var(--ink-3);
}

.prose {
  max-width: var(--measure);
}

code {
  font-family: var(--mono);
  font-size: 0.86em;
  background: var(--paper-2);
  border: 1px solid var(--rule);
  padding: 1px 5px;
  white-space: nowrap;
}

/* ---------- links ---------- */

.link,
.prose a,
.article-body a {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--mark);
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
  transition: color 120ms ease;
}

.link:hover,
.prose a:hover,
.article-body a:hover {
  color: var(--mark);
}

.ext::after {
  content: " ↗";
  font-size: 0.82em;
  color: var(--ink-3);
}

/* ---------- layout ---------- */

.wrap {
  width: 100%;
  max-width: var(--page);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.sec {
  padding-top: clamp(40px, 5.6vw, 72px);
}

.sec--work {
  padding-top: clamp(44px, 5.4vw, 72px);
  padding-bottom: clamp(20px, 3vw, 34px);
}

/* The first section after a page title does not need a second opening. */
.page-head + .sec {
  padding-top: clamp(22px, 2.8vw, 34px);
}

.sec--notes {
  padding-top: clamp(36px, 4.4vw, 56px);
}

.sec-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px 28px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--rule-2);
  margin-bottom: 4px;
}

.sec-head h2 {
  font-size: clamp(1.35rem, 2.2vw, 1.6rem);
  line-height: 1.1;
}

.sec-note {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--ink-3);
  margin: 0;
  white-space: nowrap;
}

/* ---------- skip link ---------- */

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--ink);
  color: var(--paper);
  padding: 12px 18px;
  font-family: var(--mono);
  font-size: 12px;
  z-index: 20;
}

.skip:focus {
  left: 12px;
  top: 12px;
}

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

.site-head {
  padding-top: clamp(20px, 3vw, 30px);
}

.masthead {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 18px 32px;
  padding-bottom: 13px;
  border-bottom: 1px solid var(--rule-2);
}

.brand {
  font-family: var(--serif);
  font-size: clamp(1.08rem, 1.7vw, 1.22rem);
  line-height: 1.1;
  letter-spacing: -0.014em;
  white-space: nowrap;
}

.brand:hover {
  color: var(--mark);
}

.nav {
  display: flex;
  align-items: baseline;
  gap: clamp(14px, 2.2vw, 24px);
  font-size: 0.9rem;
  color: var(--ink-2);
}

.nav a {
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  white-space: nowrap;
  transition: color 120ms ease, border-color 120ms ease;
}

.nav a:hover {
  color: var(--ink);
  border-bottom-color: var(--rule-2);
}

.nav a[aria-current="page"] {
  color: var(--ink);
  border-bottom-color: var(--mark);
}

/* ---------- opening ---------- */

.intro {
  padding-top: clamp(38px, 6vw, 68px);
  padding-bottom: clamp(6px, 1.4vw, 14px);
}

.intro h1 {
  max-width: 27ch;
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  line-height: 1.14;
  letter-spacing: -0.024em;
}

.bio {
  margin-top: clamp(18px, 2.4vw, 26px);
  max-width: 62ch;
  color: var(--ink-2);
  font-size: 1.02rem;
  line-height: 1.66;
}

.statusline {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 26px;
  margin-top: clamp(24px, 3.4vw, 36px);
  padding-top: 11px;
  border-top: 1px solid var(--rule);
  font-family: var(--mono);
  font-size: 0.7rem;
  line-height: 1.7;
  color: var(--ink-3);
  max-width: none;
}

.statusline b {
  font-weight: 400;
  color: var(--mark);
}

/* ---------- work record ---------- */

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

.work-item {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  padding-block: clamp(30px, 4.2vw, 46px);
  border-bottom: 1px solid var(--rule);
}

.work-item:last-child {
  border-bottom: 0;
}

.work-num {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--ink-3);
  padding-top: 0.55em;
  transition: color 120ms ease;
}

.work-item:hover .work-num {
  color: var(--mark);
}

.work-main {
  min-width: 0;
}

.work-top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px 24px;
}

.work-name {
  font-size: clamp(1.75rem, 3.9vw, 2.7rem);
  line-height: 1.02;
  letter-spacing: -0.028em;
}

.work-name a {
  transition: color 120ms ease;
}

.work-name a:hover {
  color: var(--mark);
}

.work-facts {
  margin: 10px 0 0;
  font-family: var(--mono);
  font-size: 0.7rem;
  line-height: 1.7;
  color: var(--ink-3);
}

.work-copy {
  margin-top: clamp(16px, 2vw, 22px);
  max-width: 58ch;
  color: var(--ink-2);
}

.work-copy p {
  margin-bottom: 0.9em;
}

.work-links {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 22px;
  margin: 20px 0 0;
  font-size: 0.92rem;
}

.work-links a {
  text-decoration: underline;
  text-decoration-color: var(--mark);
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

.work-links a:hover {
  color: var(--mark);
}

.work-links a.is-muted {
  color: var(--ink-2);
  text-decoration-color: var(--rule-2);
}

.work-links a.is-muted:hover {
  color: var(--mark);
  text-decoration-color: var(--mark);
}

.work-main--split {
  display: grid;
  gap: 26px;
}

/* A project that should not compete with the one above it. */
.work-item--compact {
  padding-block: clamp(22px, 2.8vw, 30px);
}

.work-item--compact .work-name {
  font-size: 1.34rem;
  letter-spacing: -0.016em;
}

.work-item--compact .work-copy {
  margin-top: 8px;
  font-size: 0.97rem;
}

.work-item--compact .work-links {
  margin-top: 12px;
  font-size: 0.88rem;
}

/* Monospaced evidence line — stack, versions, dates. */
.stack {
  margin-top: 12px;
  line-height: 1.9;
}

/* ---------- list of one-line rows ---------- */

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

.notes li {
  border-bottom: 1px solid var(--rule);
}

.notes a {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 8px 24px;
  padding: 14px 0 15px;
}

.note-title {
  font-family: var(--serif);
  font-size: 1.08rem;
  line-height: 1.28;
  letter-spacing: -0.012em;
  transition: color 120ms ease;
}

.notes a:hover .note-title {
  color: var(--mark);
}

.note-date {
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--ink-3);
  white-space: nowrap;
}

.note-dek {
  display: block;
  grid-column: 1 / 2;
  margin-top: 4px;
  font-size: 0.94rem;
  line-height: 1.6;
  color: var(--ink-2);
  max-width: 62ch;
}

.notes--roomy a {
  padding-block: 20px 21px;
}

.notes--roomy .note-title {
  font-size: clamp(1.12rem, 1.9vw, 1.3rem);
}

.notes-foot {
  margin-top: 16px;
}

/* ---------- spec ---------- */

.spec {
  margin: 0 0 clamp(26px, 3.4vw, 38px);
  border-top: 1px solid var(--rule-2);
  max-width: var(--measure);
}

.spec > div {
  display: grid;
  grid-template-columns: 118px minmax(0, 1fr);
  gap: 14px;
  padding: 9px 0;
  border-bottom: 1px solid var(--rule);
}

.spec dt {
  font-family: var(--mono);
  font-size: 0.66rem;
  color: var(--ink-3);
  padding-top: 3px;
}

.spec dd {
  margin: 0;
  font-family: var(--mono);
  font-size: 0.78rem;
  line-height: 1.6;
  color: var(--ink);
  overflow-wrap: break-word;
}

.spec dd a {
  text-decoration: underline;
  text-decoration-color: var(--rule-2);
  text-underline-offset: 3px;
}

.spec dd a:hover {
  color: var(--mark);
  text-decoration-color: var(--mark);
}

.spec--spaced {
  margin-top: 26px;
}

/* ---------- capability rows: label + one paragraph ---------- */

.caps {
  margin: 0;
  border-top: 1px solid var(--rule-2);
  max-width: var(--measure);
}

.caps > div {
  display: grid;
  grid-template-columns: minmax(0, 172px) minmax(0, 1fr);
  gap: 6px 28px;
  padding: 15px 0 16px;
  border-bottom: 1px solid var(--rule);
}

.caps dt {
  font-family: var(--serif);
  font-size: 1.02rem;
  line-height: 1.32;
  letter-spacing: -0.01em;
}

.caps dd {
  margin: 0;
  color: var(--ink-2);
  font-size: 0.96rem;
  line-height: 1.62;
}

/* ---------- question + answer ---------- */

.faq {
  margin: 0;
  max-width: var(--measure);
}

.faq > div {
  padding: 15px 0 16px;
  border-bottom: 1px solid var(--rule);
}

.faq > div:first-child {
  border-top: 1px solid var(--rule-2);
}

.faq dt {
  font-family: var(--serif);
  font-size: 1.04rem;
  line-height: 1.34;
  letter-spacing: -0.01em;
  margin-bottom: 6px;
}

.faq dd {
  margin: 0;
  color: var(--ink-2);
  font-size: 0.97rem;
  line-height: 1.62;
}

.faq dd p + p {
  margin-top: 0.7em;
}

/* ---------- figures ---------- */

.fig {
  margin: 0;
}

.fig img {
  width: 100%;
  border: 1px solid var(--rule-2);
  background: var(--paper-2);
}

.fig figcaption {
  margin-top: 9px;
  font-size: 0.76rem;
  line-height: 1.5;
  color: var(--ink-2);
  max-width: 48ch;
}

.fig-n {
  font-family: var(--mono);
  font-size: 0.62rem;
  color: var(--mark);
  margin-right: 7px;
}

.figpair {
  display: grid;
  gap: clamp(18px, 2.4vw, 26px);
  align-items: start;
  margin-bottom: clamp(26px, 3.4vw, 38px);
}

/* Two screenshots of the same window, so the pair is shown in one plate
   size: a common 5:4 box with the image letterboxed onto the mount. Without
   it the captions land at different heights and the row reads as a hole. */
.figpair .fig img {
  aspect-ratio: 5 / 4;
  object-fit: contain;
}

/* ---------- page head (inner pages) ---------- */

.page-head {
  padding-top: clamp(34px, 5.4vw, 62px);
  padding-bottom: clamp(14px, 2vw, 22px);
}

.page-head h1 {
  font-size: clamp(1.95rem, 4.4vw, 3rem);
  line-height: 1.04;
  letter-spacing: -0.026em;
  max-width: 24ch;
}

.page-head .mono {
  margin-bottom: 12px;
}

.page-head .lede {
  margin-top: 16px;
}

.lede {
  font-size: clamp(1.02rem, 1.4vw, 1.1rem);
  line-height: 1.62;
  max-width: 58ch;
  color: var(--ink-2);
}

/* ---------- long-form body ---------- */

.case {
  max-width: var(--measure);
}

.case h2 {
  font-size: clamp(1.32rem, 2.3vw, 1.58rem);
  margin: 2.2em 0 0.55em;
}

.case h2:first-child {
  margin-top: 0;
}

.case h3 {
  font-size: 1.12rem;
  margin: 1.9em 0 0.45em;
  letter-spacing: -0.012em;
}

.case h3:first-child {
  margin-top: 0;
}

.case p {
  line-height: 1.7;
}

.case ul {
  margin: 0 0 1.4em;
  padding-left: 1.05em;
}

.case li {
  margin-bottom: 0.55em;
  color: var(--ink-2);
  line-height: 1.65;
}

.case li::marker {
  color: var(--rule-2);
}

.case li strong {
  color: var(--ink);
  font-weight: 600;
}

/* ---------- article ---------- */

.article-head {
  padding-top: clamp(34px, 5.4vw, 62px);
  padding-bottom: clamp(20px, 2.6vw, 30px);
}

.kicker {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--ink-3);
  margin: 0 0 14px;
}

.kicker a {
  text-decoration: underline;
  text-decoration-color: var(--rule-2);
  text-underline-offset: 3px;
}

.kicker a:hover {
  color: var(--mark);
}

.article-head h1 {
  font-size: clamp(1.7rem, 3.6vw, 2.5rem);
  line-height: 1.07;
  letter-spacing: -0.026em;
  max-width: 28ch;
}

.article-meta {
  margin-top: 18px;
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--ink-3);
}

.article-meta span + span::before {
  content: " · ";
  color: var(--rule-2);
  white-space: pre;
}

.article-body {
  max-width: var(--measure);
  font-size: 1.0625rem;
  line-height: 1.7;
}

.article-body > p:first-child {
  font-size: 1.14rem;
  line-height: 1.6;
  color: var(--ink);
}

.article-body h2 {
  font-size: clamp(1.32rem, 2.3vw, 1.58rem);
  margin: 2.2em 0 0.55em;
}

.article-body h3 {
  font-size: 1.08rem;
  margin: 1.9em 0 0.5em;
}

.article-body ul,
.article-body ol {
  margin: 0 0 1.3em;
  padding-left: 1.15em;
}

.article-body li {
  margin-bottom: 0.5em;
}

.article-body li::marker {
  color: var(--rule-2);
}

.article-body blockquote {
  margin: 1.9em 0;
  padding: 2px 0 2px 20px;
  border-left: 2px solid var(--mark);
  color: var(--ink-2);
  font-family: var(--serif);
  font-size: 1.16rem;
  line-height: 1.5;
}

.article-body blockquote p {
  margin-bottom: 0.55em;
}

.article-body pre {
  margin: 0 0 1.4em;
  padding: 15px 17px;
  overflow-x: auto;
  background: var(--paper-2);
  border: 1px solid var(--rule);
}

.article-body pre code {
  background: none;
  border: 0;
  padding: 0;
  font-size: 0.8rem;
  line-height: 1.65;
}

.article-body hr {
  border: 0;
  border-top: 1px solid var(--rule);
  margin: 2.3em 0;
}

.article-body small {
  font-size: 0.86rem;
  line-height: 1.6;
  color: var(--ink-3);
}

.article-next {
  max-width: var(--measure);
  margin-top: clamp(28px, 3.6vw, 40px);
  padding-top: 14px;
  border-top: 1px solid var(--rule-2);
}

.article-next .mono {
  display: block;
  margin-bottom: 7px;
}

.article-next a {
  font-family: var(--serif);
  font-size: clamp(1.1rem, 1.8vw, 1.3rem);
  line-height: 1.25;
  letter-spacing: -0.012em;
  text-decoration: underline;
  text-decoration-color: var(--rule-2);
  text-underline-offset: 5px;
}

.article-next a:hover {
  color: var(--mark);
  text-decoration-color: var(--mark);
}

.article-foot {
  margin-top: clamp(30px, 3.8vw, 44px);
  padding-top: 14px;
  border-top: 1px solid var(--rule);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px 24px;
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--ink-2);
  max-width: var(--measure);
}

.article-foot a:hover {
  color: var(--mark);
}

/* ---------- actions ---------- */

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  margin-top: 26px;
  font-size: 0.92rem;
}

.actions a {
  text-decoration: underline;
  text-decoration-color: var(--mark);
  text-underline-offset: 4px;
}

.actions a:hover {
  color: var(--mark);
}

.actions a.is-muted {
  color: var(--ink-2);
  text-decoration-color: var(--rule-2);
}

.actions a.is-muted:hover {
  color: var(--mark);
  text-decoration-color: var(--mark);
}

/* ---------- footer: drawing title block ---------- */

.site-foot {
  margin-top: clamp(48px, 7vw, 88px);
  border-top: 1px solid var(--rule-2);
  padding-bottom: clamp(42px, 6vw, 64px);
}

.foot-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px 28px;
  padding: 16px 0 14px;
  border-bottom: 1px solid var(--rule);
  font-size: 0.88rem;
  color: var(--ink-2);
}

.foot-nav a:hover {
  color: var(--mark);
}

.foot-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
}

.tblock {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  margin: 0;
  border-bottom: 1px solid var(--rule);
}

.tblock > div {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 12px;
  padding: 7px 0;
  border-top: 1px solid var(--rule);
}

.tblock > div:first-child {
  border-top: 0;
}

.tblock dt {
  font-family: var(--mono);
  font-size: 0.64rem;
  color: var(--ink-3);
  padding-top: 3px;
}

.tblock dd {
  margin: 0;
  font-family: var(--mono);
  font-size: 0.7rem;
  line-height: 1.6;
  color: var(--ink-2);
}

.colophon {
  margin-top: 14px;
  font-family: var(--mono);
  font-size: 0.64rem;
  line-height: 1.8;
  color: var(--ink-3);
}

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

.notfound {
  padding-block: clamp(64px, 11vw, 130px);
  max-width: 46ch;
}

.notfound .kicker {
  color: var(--mark);
}

.notfound h1 {
  font-size: clamp(1.9rem, 4.4vw, 2.8rem);
  line-height: 1.06;
  margin-bottom: 16px;
}

.notfound p {
  color: var(--ink-2);
  max-width: 44ch;
  margin-bottom: 22px;
}

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

@media (min-width: 760px) {
  .work-item {
    grid-template-columns: var(--num) minmax(0, 1fr);
  }

  .work-main--split {
    grid-template-columns: minmax(0, 1fr) 286px;
    gap: 44px;
    align-items: start;
  }

  /* Equal columns, so two letterboxed plates in the same ratio also land on
     the same baseline and their captions line up. */
  .figpair {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .tblock {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 44px;
  }

  .tblock > div:nth-child(2) {
    border-top: 0;
  }
}

@media (max-width: 620px) {
  .masthead {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .nav {
    flex-wrap: wrap;
  }

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

  .sec-head {
    flex-direction: column;
    gap: 6px;
  }

  .sec-note {
    white-space: normal;
  }

  .work-top {
    display: block;
  }

  .spec > div {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 10px;
  }

  .foot-nav {
    flex-direction: column;
  }
}

/* ---------- preferences ---------- */

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}

@media print {
  .site-head,
  .site-foot,
  .article-foot,
  .skip,
  .statusline {
    display: none;
  }

  body {
    background: #fff;
    font-size: 11pt;
  }

  .article-body,
  .case {
    max-width: none;
  }
}