/* ==========================================================================
   Site styles: landing page, articles, archive and other pages that use the
   `default` layout. The About page has its own layout (assets/css/style.css).

   Type:   Archivo (titles, UI), Literata (prose), JetBrains Mono (code)
   Colour: cool paper, slate ink, one teal accent; light and dark
   ========================================================================== */

@font-face { font-family: "Archivo"; src: url("../fonts/archivo-var.woff2") format("woff2"); font-weight: 100 900; font-stretch: 62% 125%; font-display: swap; }
@font-face { font-family: "Literata"; src: url("../fonts/literata-var.woff2") format("woff2"); font-weight: 200 900; font-style: normal; font-display: swap; }
@font-face { font-family: "Literata"; src: url("../fonts/literata-var-italic.woff2") format("woff2"); font-weight: 200 900; font-style: italic; font-display: swap; }
@font-face { font-family: "JetBrains Mono"; src: url("../fonts/jetbrains-mono-var.woff2") format("woff2"); font-weight: 100 800; font-display: swap; }

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

:root {
  color-scheme: light;
  --paper: #f5f7f8;
  --surface: #ffffff;
  --ink: #16202a;
  --ink-soft: #35424e;
  --graphite: #566472;
  --rule: #d8e0e5;
  --signal: #0f6e87;
  --signal-strong: #0a5468;
  --code-bg: #ebf0f3;
  --plate: #111b24;
  --img-filter: none;

  --font-display: "Archivo", "Helvetica Neue", Arial, system-ui, sans-serif;
  --font-text: "Literata", Georgia, "Times New Roman", serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;

  --page: 70rem;
  --gutter: clamp(1rem, 4vw, 2rem);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --paper: #0e151c;
    --surface: #151f29;
    --ink: #e6edf2;
    --ink-soft: #c3cfd8;
    --graphite: #9aabb8;
    --rule: #263543;
    --signal: #5cbbd1;
    --signal-strong: #8ad3e4;
    --code-bg: #17222d;
    --plate: #0b1117;
    --img-filter: brightness(0.9);
  }
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --paper: #0e151c;
  --surface: #151f29;
  --ink: #e6edf2;
  --ink-soft: #c3cfd8;
  --graphite: #9aabb8;
  --rule: #263543;
  --signal: #5cbbd1;
  --signal-strong: #8ad3e4;
  --code-bg: #17222d;
  --plate: #0b1117;
  --img-filter: brightness(0.9);
}

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

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

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

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-text);
  font-size: 1.0625rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.site-main { flex: 1 0 auto; }

img, video { max-width: 100%; height: auto; }

a { color: var(--signal); text-underline-offset: 0.18em; text-decoration-thickness: 0.06em; }
a:hover { color: var(--signal-strong); }

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

.skip-link { position: absolute; left: -999px; top: 0; }
.skip-link:focus {
  left: 1rem; top: 1rem; z-index: 10;
  padding: 0.5rem 0.75rem;
  background: var(--ink); color: var(--paper);
  font: 500 0.9375rem var(--font-display);
}

/* ---- Header ------------------------------------------------------------ */

.site-header-inner,
.site-footer-inner {
  max-width: var(--page);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.site-header-inner {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem 1.75rem;
  padding-block: 1.25rem;
}

.site-name {
  margin-right: auto;
  font: 700 1.125rem/1.2 var(--font-display);
  font-stretch: 90%;
  letter-spacing: -0.01em;
  color: var(--ink);
  text-decoration: none;
}
.site-name:hover { color: var(--ink); }

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.25rem;
  font: 500 0.9375rem var(--font-display);
}
.site-nav a {
  padding-block: 0.25rem;
  border-bottom: 2px solid transparent;
  color: var(--graphite);
  text-decoration: none;
}
.site-nav a:hover { color: var(--ink); }
.site-nav a[aria-current="page"] { color: var(--ink); border-bottom-color: var(--signal); }

.theme-toggle {
  display: inline-grid;
  place-items: center;
  width: 2.25rem; height: 2.25rem;
  padding: 0;
  border: 0; border-radius: 50%;
  background: transparent;
  color: var(--graphite);
  cursor: pointer;
}
.theme-toggle:hover { color: var(--ink); background: var(--code-bg); }

@media (max-width: 40rem) {
  .site-name { order: 1; }
  .theme-toggle { order: 2; margin-right: -0.5rem; }
  .site-nav { order: 3; flex-basis: 100%; }
}

/* ---- Landing page ------------------------------------------------------ */

.masthead,
.timeline {
  max-width: var(--page);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.masthead { padding-block: clamp(1.75rem, 6vw, 4rem) clamp(1.25rem, 4vw, 2.5rem); }

.masthead-title {
  max-width: 20ch;
  margin: 0;
  font: 750 clamp(2.25rem, 6vw, 4rem)/1.02 var(--font-display);
  font-stretch: 84%;
  letter-spacing: -0.025em;
  text-wrap: balance;
}

.masthead-intro { max-width: 40rem; margin-top: 1.25rem; color: var(--ink-soft); }

.timeline { padding-bottom: 4rem; }

.year-group {
  display: grid;
  grid-template-columns: 6.5rem minmax(0, 1fr);
  column-gap: 2rem;
}
/* A rule between years marks the gap in the timeline. */
.year-group + .year-group { margin-top: 1.5rem; padding-top: 1.5rem; border-top: 1px solid var(--rule); }

.year-label {
  position: sticky;
  top: 1.5rem;
  align-self: start;
  margin: 0;
  padding-top: 1.75rem;
  font: 700 1.75rem/1 var(--font-display);
  font-stretch: 90%;
  font-variant-numeric: tabular-nums;
  color: var(--graphite);
}

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

.entry {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
  gap: 1.25rem 2rem;
  align-items: start;
  padding-block: 1.75rem;
}

.entry-media {
  aspect-ratio: 8 / 5;
  overflow: hidden;
  border: 1px solid var(--rule);
  border-radius: 6px;
  background: var(--plate);
}
.entry-media > img,
.entry-media > video {
  display: block;
  width: 100%; height: 100%;
  object-fit: cover;
  filter: var(--img-filter);
}
/* No preview: an empty plot area. */
.entry-media--empty {
  background-color: var(--plate);
  background-image:
    linear-gradient(var(--rule) 1px, transparent 1px),
    linear-gradient(90deg, var(--rule) 1px, transparent 1px);
  background-size: 2.5rem 2.5rem;
  opacity: 0.6;
}

.entry-body { min-width: 0; }

.entry-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0 1rem;
  margin: 0 0 0.5rem;
  font: 500 0.875rem/1.4 var(--font-display);
  color: var(--graphite);
}

.entry-title {
  margin: 0 0 0.6rem;
  font: 700 clamp(1.4rem, 2.4vw, 1.75rem)/1.14 var(--font-display);
  font-stretch: 90%;
  letter-spacing: -0.015em;
  text-wrap: balance;
}
.entry-title a { color: var(--ink); text-decoration: none; }
/* The whole row is the click target. */
.entry-title a::after { content: ""; position: absolute; inset: 0; }
.entry-title a:hover { text-decoration: underline; text-decoration-color: var(--signal); text-decoration-thickness: 0.1em; text-underline-offset: 0.2em; }
.entry-title a:focus-visible { outline: none; }
.entry:has(.entry-title a:focus-visible) { outline: 2px solid var(--signal); outline-offset: 2px; border-radius: 8px; }

.entry-summary { max-width: 46ch; margin: 0; color: var(--ink-soft); }

@media (max-width: 60rem) {
  .year-group { grid-template-columns: 4.5rem minmax(0, 1fr); column-gap: 1.25rem; }
  .entry { gap: 1.25rem; }
}

@media (max-width: 45rem) {
  .year-group { grid-template-columns: minmax(0, 1fr); }
  .year-label { position: static; padding-top: 0.5rem; }
  .entry { grid-template-columns: minmax(0, 1fr); gap: 0.9rem; padding-block: 1.25rem; }
}

/* ---- Articles ---------------------------------------------------------- */

.article {
  display: grid;
  grid-template-columns:
    [full-start] minmax(var(--gutter), 1fr)
    [wide-start] minmax(0, 8rem)
    [text-start] min(41rem, calc(100vw - 2 * var(--gutter)))
    [text-end] minmax(0, 8rem)
    [wide-end] minmax(var(--gutter), 1fr)
    [full-end];
  padding-bottom: 4rem;
}

.article-header { grid-column: text-start / wide-end; padding-block: clamp(1.5rem, 5vw, 3.5rem) 1.5rem; }

.article-title {
  margin: 0;
  font: 750 clamp(2rem, 4.6vw, 3rem)/1.08 var(--font-display);
  font-stretch: 86%;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0 1.25rem;
  margin: 1rem 0 0;
  font: 500 0.9375rem/1.4 var(--font-display);
  color: var(--graphite);
}

.article-body {
  display: grid;
  grid-column: full-start / full-end;
  grid-template-columns: subgrid;
  font-size: 1.1875rem;
  line-height: 1.7;
}
.article-body > * { grid-column: text; min-width: 0; }
.article-body > figure,
.article-body > pre,
.article-body > table,
.article-body > .embed-container { grid-column: wide; }

.article-body p { margin: 0 0 1.2em; }

.article-body h2, .article-body h3, .article-body h4 {
  font-family: var(--font-display);
  font-stretch: 90%;
  line-height: 1.2;
  letter-spacing: -0.012em;
  text-wrap: balance;
}
.article-body h2 { margin: 2.6em 0 0.6em; font-size: 1.85rem; font-weight: 700; }
.article-body h3 { margin: 2.1em 0 0.5em; font-size: 1.4rem; font-weight: 700; }
.article-body h4 { margin: 1.8em 0 0.4em; font-size: 1.15rem; font-weight: 650; }

.anchor-link {
  margin-left: 0.4em;
  font-size: 0.8em;
  font-weight: 400;
  color: var(--graphite);
  text-decoration: none;
  opacity: 0;
}
:is(h2, h3, h4):hover > .anchor-link,
.anchor-link:focus-visible { opacity: 1; }
@media (hover: none) { .anchor-link { opacity: 0.4; } }

.article-body ul, .article-body ol { margin: 0 0 1.2em; padding-left: 1.5em; }
.article-body li { margin-block: 0.3em; }
.article-body li > ul, .article-body li > ol { margin-bottom: 0; }

.article-body strong { font-weight: 650; }

.article-body blockquote {
  margin: 1.5em 0;
  padding-left: 1.1em;
  border-left: 3px solid var(--signal);
  color: var(--ink-soft);
}

.article-body hr { margin: 2.5em 0; border: 0; border-top: 1px solid var(--rule); }

/* Code */
.article-body code,
.article-body pre { font-family: var(--font-mono); font-feature-settings: "liga" 0, "calt" 0; }
.article-body :not(pre) > code {
  padding: 0.12em 0.35em;
  border-radius: 4px;
  background: var(--code-bg);
  font-size: 0.82em;
  overflow-wrap: anywhere;
}
.article-body pre {
  margin: 0 0 1.4em;
  padding: 1rem 1.25rem;
  overflow-x: auto;
  border: 1px solid var(--rule);
  border-radius: 6px;
  background: var(--code-bg);
  font-size: 0.84rem;
  line-height: 1.6;
  tab-size: 2;
}

/* Tables */
.article-body table {
  display: block;
  width: max-content;
  max-width: 100%;
  margin: 0 0 1.5em;
  overflow-x: auto;
  border-collapse: collapse;
  font: 0.9375rem/1.45 var(--font-display);
  font-variant-numeric: tabular-nums;
}
.article-body th, .article-body td { padding: 0.5em 0.9em; border-bottom: 1px solid var(--rule); text-align: left; }
.article-body th { border-bottom-width: 2px; font-weight: 650; }

/* Figures: sized to the image, caption aligned to its left edge */
.article-body figure { justify-self: center; width: fit-content; max-width: 100%; margin: 2em 0; }
.article-body figure img { display: block; border: 1px solid var(--rule); border-radius: 4px; }
.article-body > p > img { display: block; margin: 1.5em auto; border: 1px solid var(--rule); border-radius: 4px; }
.article-body img { filter: var(--img-filter); }
.article-body figcaption {
  margin-top: 0.6rem;
  font: 0.875rem/1.4 var(--font-display);
  color: var(--graphite);
  overflow-wrap: anywhere;
}
.article-body figcaption:empty { display: none; }

.embed-container { position: relative; height: 0; max-width: 100%; margin-bottom: 1rem; padding-bottom: 56.25%; overflow: hidden; }
.embed-container iframe, .embed-container object, .embed-container embed { position: absolute; inset: 0; width: 100%; height: 100%; }

.message { margin-bottom: 1.5rem; padding: 0.9rem 1.1rem; border-left: 3px solid var(--signal); background: var(--code-bg); font: 0.9375rem var(--font-display); color: var(--ink-soft); }

/* Share and pager */
.share {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.25rem 1.1rem;
  margin: 3rem 0 0;
  font: 500 0.9375rem var(--font-display);
  color: var(--graphite);
}

.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; margin-top: 2.5rem; font-family: var(--font-display); }
.pager-link { display: block; padding-top: 1rem; border-top: 1px solid var(--rule); color: var(--ink); text-decoration: none; }
.pager-next { text-align: right; }
.pager-label { display: block; margin-bottom: 0.25rem; font-size: 0.8125rem; font-weight: 500; color: var(--graphite); }
.pager-title { font-size: 1.0625rem; font-weight: 650; line-height: 1.25; }
.pager-link:hover { color: var(--signal-strong); }
.pager-link:hover .pager-title { text-decoration: underline; text-underline-offset: 0.2em; }
@media (max-width: 35rem) { .pager { grid-template-columns: 1fr; } .pager-next { text-align: left; } }

.comments { grid-column: text-start / text-end; margin-top: 3rem; }

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

.site-footer { flex-shrink: 0; margin-top: 2rem; border-top: 1px solid var(--rule); font: 0.9375rem/1.55 var(--font-display); color: var(--graphite); }
.site-footer-inner { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 1rem 3rem; padding-block: 2rem 2.5rem; }
.site-footer p { margin: 0; }
.footer-author { margin-bottom: 0.25rem !important; font-weight: 650; color: var(--ink); }
.footer-about { max-width: 38rem; }
.footer-links { display: flex; gap: 1.25rem; margin: 0; padding: 0; list-style: none; }
.footer-credit { grid-column: 1 / -1; font-size: 0.8125rem; }
.site-footer a { color: inherit; }
.site-footer a:hover { color: var(--ink); }
@media (max-width: 40rem) { .site-footer-inner { grid-template-columns: 1fr; } }

/* ---- Print and motion -------------------------------------------------- */

@media print {
  .site-header, .site-footer, .share, .pager, .comments, .skip-link { display: none; }
  body { background: #fff; color: #000; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; scroll-behavior: auto !important; }
}