/* Fonts: Big Shoulders Display, Atkinson Hyperlegible Next and Mono (SIL OFL) */
@font-face { font-family: "Display"; src: url("/fonts/display.woff2") format("woff2"); font-weight: 100 900; font-display: swap; }
@font-face { font-family: "Text"; src: url("/fonts/text.woff2") format("woff2"); font-weight: 200 800; font-display: swap; }
@font-face { font-family: "Text"; src: url("/fonts/text-italic.woff2") format("woff2"); font-weight: 200 800; font-style: italic; font-display: swap; }
@font-face { font-family: "Mono"; src: url("/fonts/mono.woff2") format("woff2"); font-weight: 200 800; font-display: swap; }

:root {
  color-scheme: light dark;
  --bg: light-dark(#fbfcfc, #12171d);
  --raised: light-dark(#f0f3f5, #1b222a);
  --ink: light-dark(#14202b, #e8ecf0);
  --muted: light-dark(#56626e, #9eabb7);
  --line: light-dark(#dbe0e5, #2b343e);
  --accent: light-dark(#0f5fa8, #7fbaf0);
  --code: #0d1319;
  --code-ink: #dfe5ea;
  --gutter: clamp(1rem, 4vw, 2.5rem);
}
:root[data-theme="light"] { color-scheme: light; }
:root[data-theme="dark"] { color-scheme: dark; }

*, *::before, *::after { box-sizing: border-box; }
html { background: var(--bg); -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 400 1.125rem/1.65 "Text", system-ui, sans-serif; overflow-wrap: break-word; }
img { max-width: 100%; height: auto; }
a { color: var(--accent); text-underline-offset: .2em; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.skip { position: absolute; left: -999px; z-index: 2; padding: .5rem 1rem; background: var(--ink); color: var(--bg); }
.skip:focus { left: 1rem; top: 1rem; }

.page { display: flex; flex-direction: column; max-width: 68rem; min-height: 100vh; margin: 0 auto; padding-inline: var(--gutter); }
main { flex: 1; }

/* Header */
.top { display: flex; flex-wrap: wrap; align-items: center; gap: .25rem 2rem; padding-block: 1rem; border-bottom: 1px solid var(--line); }
.brand { display: inline-flex; align-items: center; gap: .6rem; color: var(--ink); text-decoration: none; font: 700 1.375rem/1 "Display", sans-serif; letter-spacing: .01em; }
.brand img { border-radius: 50%; }
.links { display: flex; gap: 1.5rem; margin-right: auto; font-size: 1rem; }
.links a { padding-block: .35rem; color: var(--muted); text-decoration: none; border-bottom: 2px solid transparent; }
.links a:hover { color: var(--ink); }
.links a[aria-current] { color: var(--ink); border-bottom-color: var(--accent); }
.tools { display: flex; align-items: center; gap: .25rem; }
.switch, .theme { display: grid; place-items: center; min-width: 2.25rem; height: 2.25rem; padding: 0; border: 0; border-radius: 3px; background: none; color: var(--muted); cursor: pointer; text-decoration: none; font: 600 .8125rem/1 "Mono", monospace; }
.switch:hover, .theme:hover { color: var(--ink); background: var(--raised); }
.theme svg { width: 1rem; height: 1rem; fill: currentColor; }

/* Home */
.intro { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr); gap: 2rem clamp(2rem, 6vw, 5rem); padding-block: clamp(2.5rem, 7vw, 4.5rem); }
h1 { margin: 0; font: 800 clamp(2.75rem, 6vw, 4.25rem)/1 "Display", sans-serif; text-wrap: balance; }
.intro h1 { font-size: clamp(2.25rem, 4.5vw, 3.25rem); }
.lede { margin: 1rem 0 0; font-size: 1.3125rem; line-height: 1.45; }
.intro p:not(.lede) { margin: 1rem 0 0; color: var(--muted); }
.facts { align-self: end; margin: 0; border-top: 2px solid var(--ink); }
.facts div { display: grid; grid-template-columns: 6rem minmax(0, 1fr); gap: 1rem; padding-block: .55rem; border-bottom: 1px solid var(--line); }
.facts dt { color: var(--muted); font: 500 .8125rem/1.7 "Mono", monospace; }
.facts dd { margin: 0; font-size: 1rem; line-height: 1.45; }

/* Post index, set like a report table */
.index { padding-bottom: 3rem; }
.index ol { margin: 0; padding: 0; list-style: none; }
.row-head, .index li a { display: grid; grid-template-columns: 8rem minmax(0, 1fr) 7rem; gap: 0 1.5rem; }
.row-head { padding-block: .5rem; border-top: 2px solid var(--ink); border-bottom: 1px solid var(--ink); color: var(--muted); font: 500 .8125rem/1.4 "Mono", monospace; }
.index li a { align-items: baseline; padding-block: 1rem; border-bottom: 1px solid var(--line); color: inherit; text-decoration: none; }
.index time { color: var(--muted); font: 500 .8125rem/1.5 "Mono", monospace; }
.row-title { display: block; font: 700 1.625rem/1.15 "Display", sans-serif; }
.row-desc { display: block; margin-top: .2rem; color: var(--muted); font-size: 1rem; line-height: 1.4; }
.index li a:hover .row-title { color: var(--accent); text-decoration: underline; text-decoration-thickness: 2px; text-underline-offset: .15em; }
.topic { color: var(--muted); font: 500 .8125rem/1.5 "Mono", monospace; }

/* Article */
.post { display: grid; grid-template-columns: 8rem minmax(0, 42rem); gap: 0 1.5rem; padding-block: clamp(2rem, 6vw, 4rem); }
.post-meta { display: flex; flex-direction: column; gap: .25rem; padding-top: .75rem; color: var(--muted); font: 500 .8125rem/1.5 "Mono", monospace; }
.post-body { grid-column: 2; min-width: 0; }
.post-body > h1 { font-size: clamp(2.5rem, 5.5vw, 3.75rem); margin-bottom: 1rem; }
.post-body > .lede { margin: 0 0 2rem; color: var(--muted); }
.hero { display: block; width: 100%; margin-bottom: 2.5rem; border: 1px solid var(--line); }

.prose > :first-child { margin-top: 0; }
.prose p, .prose ul, .prose ol { margin-block: 0 1.15em; }
.prose h2 { margin: 2em 0 .5em; font: 700 2rem/1.1 "Display", sans-serif; }
.prose hr { display: none; }
.prose li { margin-bottom: .3em; }
.prose li::marker { color: var(--muted); }
.prose strong { font-weight: 700; }
.prose code { padding: .1em .35em; background: var(--raised); font: .875em "Mono", monospace; }
.prose pre { margin: 0 0 1.5em; padding: 1rem 1.25rem; overflow-x: auto; background: var(--code); color: var(--code-ink); font: .875rem/1.6 "Mono", monospace; }
.prose pre code { padding: 0; background: none; font: inherit; }
.prose p:has(> img:only-child) { margin-block: 1.75em; }
.prose img { display: block; border: 1px solid var(--line); }
.prose p:has(> img.aside) { margin: 0; }
.prose img.aside { float: right; width: min(42%, 260px); margin: .4em 0 .75em 1.75rem; }

.prose table { width: 100%; margin: 0 0 1.5em; border-collapse: collapse; border-top: 2px solid var(--ink); font-size: 1rem; line-height: 1.4; }
.prose th, .prose td { padding: .5rem .75rem .5rem 0; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.prose th { color: var(--muted); font: 500 .8125rem/1.4 "Mono", monospace; }
.prose th[style*="right"], .prose td[style*="right"] { padding-right: 0; font-variant-numeric: tabular-nums; }

.task { display: flex; align-items: baseline; gap: .7rem; }
.prose ul:has(> .task) { padding: 0; list-style: none; }
.check { flex: none; width: .75rem; height: .75rem; translate: 0 .05em; border: 1.5px solid var(--muted); border-radius: 2px; }
.check.on { background: var(--accent); border-color: var(--accent); }

.neighbours { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; padding-block: 1.25rem; border-top: 1px solid var(--line); }
.neighbour { display: block; color: inherit; text-decoration: none; font: 700 1.375rem/1.15 "Display", sans-serif; }
.neighbour:hover { color: var(--accent); }
.neighbour.next { grid-column: 2; text-align: right; }
.neighbour small { display: block; margin-bottom: .4rem; color: var(--muted); font: 500 .8125rem/1 "Mono", monospace; }

.bottom { display: flex; flex-wrap: wrap; justify-content: space-between; gap: .5rem 2rem; padding-block: 1.25rem; border-top: 1px solid var(--line); color: var(--muted); font-size: .9375rem; }
.bottom nav { display: flex; flex-wrap: wrap; gap: .25rem 1.25rem; }
.bottom a { color: inherit; }
.bottom a:hover { color: var(--accent); }

@media (max-width: 48rem) {
  .intro { grid-template-columns: minmax(0, 1fr); }
  .post { grid-template-columns: minmax(0, 1fr); }
  .post-meta { flex-direction: row; gap: 1rem; padding: 0 0 .75rem; }
  .post-body { grid-column: 1; }
  .row-head { display: none; }
  .index ol { border-top: 2px solid var(--ink); }
  .index li a { grid-template-columns: minmax(0, 1fr) auto; gap: .25rem 1rem; }
  .row-text { grid-column: 1 / -1; grid-row: 2; }
  .prose img.aside { float: none; width: 100%; margin: 0 0 1.25em; }
}
@media (max-width: 30rem) {
  .links { order: 3; width: 100%; }
  .tools { margin-left: auto; }
  .brand { font-size: 1.25rem; }
}