/* Low-Carbon edition. System fonts only, one stylesheet, dark by default.
   Images are pre-dithered 4-tone PNGs; the SVG filters #duo-dark / #duo-light tint them per theme. */

:root {
  /* primitives */
  --black: #000000;
  --char: #0e0e0d;
  --char-2: #171715;
  --ash: #34322e;
  --bone: #e6e1d6;
  --stone: #aaa498;
  --slate-lit: #a3bfe0;
  --amber-lit: #e6b54f;
  --moss-lit: #9ccf9a;
  --paper: #f2eee5;
  --paper-2: #e8e3d7;
  --flax: #cdc5b3;
  --soot: #1b1d20;
  --clay: #55524b;
  --slate: #2f4a66;
  --amber-deep: #7f5200;
  --moss-deep: #2f6431;

  /* semantic (dark = default) */
  --ground: var(--black);
  --surface: var(--char);
  --surface-2: var(--char-2);
  --rule: var(--ash);
  --ink: var(--bone);
  --muted: var(--stone);
  --accent: var(--slate-lit);
  --signal: var(--amber-lit);
  --ok: var(--moss-lit);
  --duo: url(#duo-dark);
  --on-accent: var(--black);

  --serif: Charter, "Bitstream Charter", "Sitka Text", Cambria, Georgia, serif;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  --measure: 44rem;
  --gutter: 1rem;
  color-scheme: dark;
}

:root[data-theme="light"] {
  --ground: var(--paper);
  --surface: var(--paper-2);
  --surface-2: #ded8ca;
  --rule: var(--flax);
  --ink: var(--soot);
  --muted: var(--clay);
  --accent: var(--slate);
  --signal: var(--amber-deep);
  --ok: var(--moss-deep);
  --duo: url(#duo-light);
  --on-accent: var(--paper);
  color-scheme: light;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--ground);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.0625rem;
  line-height: 1.6;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 0.2em; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--signal); outline-offset: 3px; border-radius: 2px; }
h1, h2, h3, h4 { font-weight: 400; line-height: 1.15; margin: 0 0 0.5em; letter-spacing: -0.01em; text-wrap: balance; }
h1 { font-size: clamp(2.25rem, 5.5vw, 4.25rem); }
h2 { font-size: clamp(1.625rem, 3vw, 2.25rem); }
h3 { font-size: 1.375rem; line-height: 1.25; }
p { margin: 0 0 1em; }
code, kbd, pre, .mono { font-family: var(--mono); }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: -999px; top: 0; background: var(--signal); color: var(--black); padding: 0.75rem 1rem; z-index: 10; font-family: var(--mono); }
.skip:focus { left: 1rem; }
svg.fx { position: absolute; width: 0; height: 0; }

.frame { max-width: 76rem; margin: 0 auto; padding: 0 var(--gutter); }
@media (min-width: 40rem) { :root { --gutter: 2rem; } }

/* ---------- labels ---------- */
.label {
  font-family: var(--mono);
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}
.label strong { color: var(--ink); font-weight: 400; }
.dim { color: var(--muted); }
.signal { color: var(--signal); }

/* ---------- header ---------- */
.site-head { border-bottom: 1px solid var(--rule); }
.head-row { display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem 1.5rem; padding-top: 1rem; padding-bottom: 0.75rem; }
.wordmark { display: inline-flex; align-items: center; gap: 0.6rem; color: var(--ink); text-decoration: none; font-size: 1.375rem; min-height: 44px; }
.wordmark svg { width: 28px; height: 28px; color: var(--accent); }
.wordmark small { font-family: var(--mono); font-size: 0.8125rem; color: var(--muted); letter-spacing: 0.04em; }
.site-nav { order: 3; width: 100%; }
.site-nav ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 0 0.25rem; }
.site-nav a {
  display: inline-flex; align-items: center; min-height: 44px; padding: 0 0.6rem;
  font-family: var(--mono); font-size: 0.9375rem; color: var(--ink); text-decoration: none;
}
.site-nav a:first-child { padding-left: 0; }
.site-nav li:first-child a { padding-left: 0; }
.site-nav a:hover { color: var(--accent); text-decoration: underline; }
.site-nav a[aria-current="page"] { color: var(--signal); }
.site-nav a[aria-current="page"]::before { content: "▸"; margin-right: 0.35em; }
.lights {
  margin-left: auto; min-height: 44px; padding: 0 0.9rem;
  font-family: var(--mono); font-size: 0.875rem; color: var(--ink);
  background: transparent; border: 1px solid var(--rule); border-radius: 999px; cursor: pointer;
  display: inline-flex; align-items: center; gap: 0.5rem;
}
.lights:hover { border-color: var(--muted); }
.lights .bulb { width: 0.75rem; height: 0.75rem; border-radius: 50%; border: 1px solid var(--muted); background: transparent; }
:root[data-theme="light"] .lights .bulb { background: var(--signal); border-color: var(--signal); }
@media (min-width: 62rem) {
  .site-nav { order: 0; width: auto; }
}

/* page-weight meter */
.meter { display: flex; flex-wrap: wrap; align-items: center; gap: 0.25rem 1rem; padding-top: 0.5rem; padding-bottom: 0.6rem; border-top: 1px dashed var(--rule); }
.meter-bar { flex: 0 0 9rem; height: 0.5rem; border: 1px solid var(--muted); position: relative; }
.meter-bar i { position: absolute; inset: 1px auto 1px 1px; background: repeating-linear-gradient(90deg, var(--signal) 0 2px, transparent 2px 4px); }
.meter .label { font-size: 0.8125rem; }

/* ---------- ledger layout: margin notes + text column ---------- */
.ledger { display: grid; grid-template-columns: minmax(0, 1fr); gap: 0 3rem; }
.ledger > .margin { padding-top: 0.35rem; }
@media (min-width: 60rem) {
  .ledger { grid-template-columns: 12rem minmax(0, 1fr); }
  .ledger > .margin { position: sticky; top: 1rem; align-self: start; }
}
.measure { max-width: var(--measure); }

.section { padding: 3.5rem 0; border-top: 1px solid var(--rule); }
.section:first-of-type { border-top: 0; }
.sec-no { font-family: var(--mono); font-size: 0.875rem; color: var(--signal); display: block; margin-bottom: 0.25rem; }
.sec-sub { color: var(--muted); font-size: 1.125rem; margin-top: -0.25rem; }

.page-intro { padding: 3rem 0 2.5rem; }
.page-intro .lede { font-size: clamp(1.1875rem, 2vw, 1.4375rem); line-height: 1.5; color: var(--ink); max-width: 40rem; }
.eyebrow { font-family: var(--mono); font-size: 0.875rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--signal); margin-bottom: 0.75rem; display: block; }

/* ---------- dithered figures ---------- */
figure { margin: 0; }
.dither { position: relative; background: var(--surface); }
.dither img { width: 100%; height: auto; image-rendering: pixelated; filter: var(--duo); }
.dither.is-original img { image-rendering: auto; filter: none; }
.dither figcaption, .fig-note {
  display: flex; flex-wrap: wrap; gap: 0.25rem 0.9rem; align-items: baseline;
  font-family: var(--mono); font-size: 0.8125rem; color: var(--muted); padding: 0.6rem 0 0;
  background: var(--ground);
}
.load-orig {
  font: inherit; color: var(--accent); background: none; border: 0; padding: 0.35rem 0; min-height: 32px;
  text-decoration: underline; text-underline-offset: 0.2em; cursor: pointer;
}
.load-orig[aria-pressed="true"] { color: var(--muted); }

/* ---------- buttons ---------- */
.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 0.75rem 1.5rem; margin-top: 1.75rem; }
.btn {
  display: inline-flex; align-items: center; min-height: 48px; padding: 0 1.25rem;
  font-family: var(--mono); font-size: 0.9375rem; text-decoration: none;
  background: var(--accent); color: var(--on-accent); border: 1px solid var(--accent); cursor: pointer;
}
.btn:hover { background: var(--ink); border-color: var(--ink); color: var(--ground); }
.btn-line { font-family: var(--mono); font-size: 0.9375rem; color: var(--ink); text-decoration: underline; text-decoration-color: var(--accent); text-decoration-thickness: 2px; min-height: 44px; display: inline-flex; align-items: center; }
.btn-quiet { font-family: var(--mono); font-size: 0.9375rem; color: var(--muted); text-decoration: none; min-height: 44px; display: inline-flex; align-items: center; }
.btn-quiet:hover { color: var(--accent); text-decoration: underline; }
.btn-ghost {
  font-family: var(--mono); font-size: 0.875rem; min-height: 40px; padding: 0 0.9rem;
  background: transparent; color: var(--ink); border: 1px solid var(--rule); cursor: pointer;
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

/* ---------- home hero ---------- */
.hero { display: grid; gap: 2rem; padding: 3rem 0 3.5rem; align-items: end; }
.hero h1 { font-size: clamp(2.5rem, 6.4vw, 5.25rem); line-height: 1.02; letter-spacing: -0.02em; margin-bottom: 1.5rem; }
.hero .sub { font-size: clamp(1.125rem, 1.8vw, 1.3125rem); max-width: 36rem; color: var(--ink); }
.hero figure { max-width: 30rem; }
@media (min-width: 60rem) {
  .hero { grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr); gap: 3.5rem; }
}
.stats { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); margin: 2rem 0 0; }
.stats > div { padding: 0.9rem 0.75rem 0.9rem 0; }
.stats > div + div { padding-left: 0.9rem; border-left: 1px solid var(--rule); }
.stats dt { font-family: var(--mono); font-size: 0.8125rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); }
.stats dd { margin: 0; font-size: clamp(1.75rem, 3.5vw, 2.5rem); line-height: 1.1; font-variant-numeric: tabular-nums; }

/* ---------- entry lists (the main content unit) ---------- */
.entries { list-style: none; margin: 0; padding: 0; }
.entry { display: grid; grid-template-columns: minmax(0, 1fr); gap: 0.15rem 1.5rem; padding: 1.1rem 0; border-top: 1px solid var(--rule); }
.entry:last-child { border-bottom: 1px solid var(--rule); }
.entry .meta { font-family: var(--mono); font-size: 0.8125rem; color: var(--muted); letter-spacing: 0.02em; }
.entry h3 { font-size: 1.3125rem; margin: 0 0 0.25rem; }
.entry h3 a { color: var(--ink); text-decoration: none; }
.entry h3 a:hover { color: var(--accent); text-decoration: underline; }
.entry p { margin: 0; color: var(--muted); font-size: 1.0625rem; }
@media (min-width: 44rem) {
  .entry { grid-template-columns: 8.5rem minmax(0, 1fr); }
  .entry .meta { padding-top: 0.3rem; }
}
.entry.has-thumb { grid-template-columns: minmax(0, 1fr); }
@media (min-width: 44rem) {
  .entry.has-thumb { grid-template-columns: 8.5rem minmax(0, 1fr) 11rem; }
  .entry.has-thumb .dither { grid-column: 3; grid-row: 1 / span 2; }
}
.tag { font-family: var(--mono); font-size: 0.8125rem; color: var(--muted); }
.tag::before { content: "#"; color: var(--rule); }
.tags { display: flex; flex-wrap: wrap; gap: 0.25rem 0.9rem; margin-top: 0.4rem; }
.badge { font-family: var(--mono); font-size: 0.8125rem; text-transform: uppercase; letter-spacing: 0.06em; border: 1px solid currentColor; padding: 0 0.4rem; color: var(--signal); white-space: nowrap; }
.badge.ok { color: var(--ok); }

/* shelves / grids */
.shelf { display: grid; gap: 2rem; grid-template-columns: minmax(0, 1fr); }
@media (min-width: 48rem) { .shelf { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
.shelf article h3 a { color: var(--ink); text-decoration: none; }
.shelf article h3 a:hover { color: var(--accent); text-decoration: underline; }
.shelf article p { color: var(--muted); }
.shelf .num { font-family: var(--mono); font-size: 0.875rem; color: var(--signal); }
.shelf .dither { margin: 0.75rem 0 1rem; }
.cols-2 { display: grid; gap: 2.5rem; grid-template-columns: minmax(0, 1fr); }
@media (min-width: 48rem) { .cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.cols-3 { display: grid; gap: 2rem; grid-template-columns: minmax(0, 1fr); }
@media (min-width: 52rem) { .cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); } }

.boxed { border: 1px solid var(--rule); padding: 1.5rem; }
.boxed.lit { border-color: var(--accent); }
.plain { list-style: none; padding: 0; margin: 0; }
.plain li { padding: 0.55rem 0; border-top: 1px dashed var(--rule); display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }
.plain li:first-child { border-top: 0; }

/* edition note */
.edition { border: 1px dashed var(--signal); padding: 1.5rem; }
.edition h2 { font-size: 1.5rem; }
.edition ol { margin: 0; padding-left: 1.25rem; }
.edition li { margin-bottom: 0.5rem; }

/* experiments grid */
.xp { display: grid; grid-template-columns: minmax(0, 1fr); border-top: 1px solid var(--rule); border-left: 1px solid var(--rule); }
@media (min-width: 44rem) { .xp { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.xp > * { border-right: 1px solid var(--rule); border-bottom: 1px solid var(--rule); padding: 1.25rem 1.25rem 1.4rem; }
.xp h3 { margin: 0.35rem 0; font-size: 1.25rem; }
.xp h3 a { color: var(--ink); }
.xp p { color: var(--muted); margin: 0 0 0.5rem; }

/* tables */
.table-wrap { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; font-size: 1rem; }
th, td { text-align: left; padding: 0.7rem 0.75rem 0.7rem 0; border-bottom: 1px solid var(--rule); vertical-align: top; }
th { font-family: var(--mono); font-size: 0.8125rem; font-weight: 400; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); }
td.num { font-family: var(--mono); font-variant-numeric: tabular-nums; white-space: nowrap; }

/* opt-in recordings */
.recording { border: 1px dashed var(--rule); padding: 1rem; display: grid; gap: 0.5rem; align-content: start; min-height: 8rem; background: repeating-linear-gradient(135deg, transparent 0 6px, var(--surface) 6px 7px); }
.recording img { width: 100%; height: auto; }
.recording .label { color: var(--muted); }

/* project rows */
.proj { display: grid; grid-template-columns: minmax(0, 1fr); gap: 1.25rem 2rem; padding: 2rem 0; border-top: 1px solid var(--rule); }
@media (min-width: 52rem) { .proj { grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); } }
.proj h3 { font-size: 1.625rem; margin-bottom: 0.4rem; }
.proj h3 a { color: var(--ink); }
.proj p { color: var(--ink); }
.chips { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-top: 0.5rem; }
.chip { font-family: var(--mono); font-size: 0.8125rem; border: 1px solid var(--rule); padding: 0.15rem 0.5rem; color: var(--muted); }

.jump { position: sticky; top: 0; z-index: 3; background: var(--ground); border-bottom: 1px solid var(--rule); }
.jump ul { list-style: none; margin: 0; padding: 0; display: flex; gap: 0 1.25rem; overflow-x: auto; }
.jump a { display: inline-flex; align-items: center; min-height: 44px; font-family: var(--mono); font-size: 0.875rem; white-space: nowrap; color: var(--ink); text-decoration: none; }
.jump a:hover { color: var(--accent); }
.jump .label { display: inline-flex; align-items: center; min-height: 44px; white-space: nowrap; }

/* filter pills (CSS-only via radios) */
.filters { display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 1rem 0 1.5rem; border: 0; padding: 0; }
.filters legend { margin-bottom: 0.5rem; }
.filters input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.filters label { font-family: var(--mono); font-size: 0.875rem; min-height: 40px; display: inline-flex; align-items: center; padding: 0 0.85rem; border: 1px solid var(--rule); cursor: pointer; color: var(--ink); }
.filters label:hover { border-color: var(--accent); }
.filters input:checked + label { background: var(--ink); color: var(--ground); border-color: var(--ink); }
.filters input:focus-visible + label { outline: 3px solid var(--signal); outline-offset: 3px; }
.archive:has(#f-dg:checked) .row:not([data-c="dg"]),
.archive:has(#f-dt:checked) .row:not([data-c="dt"]),
.archive:has(#f-ai:checked) .row:not([data-c="ai"]),
.archive:has(#f-st:checked) .row:not([data-c="st"]) { display: none; }
.archive:has(#f-dg:checked) .year:not(:has(.row[data-c="dg"])),
.archive:has(#f-dt:checked) .year:not(:has(.row[data-c="dt"])),
.archive:has(#f-ai:checked) .year:not(:has(.row[data-c="ai"])),
.archive:has(#f-st:checked) .year:not(:has(.row[data-c="st"])) { display: none; }
.year { display: grid; grid-template-columns: minmax(0, 1fr); gap: 0 2rem; padding: 1.5rem 0 0.5rem; border-top: 1px solid var(--rule); }
.year > h3 { font-family: var(--mono); font-size: 1.5rem; color: var(--signal); }
@media (min-width: 52rem) { .year { grid-template-columns: 6rem minmax(0, 1fr); } }
.row { display: grid; grid-template-columns: minmax(0, 1fr); gap: 0 1.25rem; padding: 0.75rem 0; border-bottom: 1px dashed var(--rule); }
.row:last-child { border-bottom: 0; }
.row a { color: var(--ink); text-decoration: none; font-size: 1.1875rem; }
.row a:hover { color: var(--accent); text-decoration: underline; }
.row .d { font-family: var(--mono); font-size: 0.8125rem; color: var(--muted); }
.row .c { font-family: var(--mono); font-size: 0.8125rem; color: var(--muted); }
.row p { margin: 0.15rem 0 0; color: var(--muted); font-size: 1rem; }
@media (min-width: 44rem) {
  .row { grid-template-columns: 4.5rem minmax(0, 1fr) 9rem; }
  .row .d, .row .c { padding-top: 0.25rem; }
  .row .c { text-align: right; }
}

/* ---------- article ---------- */
.art-head { padding: 3rem 0 2rem; }
.art-head h1 { max-width: 20ch; }
.art-head .lede { font-size: 1.3125rem; color: var(--muted); max-width: 40rem; }
.art-meta { display: flex; flex-wrap: wrap; gap: 0.4rem 1.25rem; font-family: var(--mono); font-size: 0.875rem; color: var(--muted); margin-top: 1rem; }
.prose { font-size: 1.1875rem; line-height: 1.7; max-width: var(--measure); }
.prose h2 { font-size: 2rem; margin: 2.75rem 0 1rem; padding-top: 1rem; border-top: 1px solid var(--rule); scroll-margin-top: 1rem; }
.prose h2 .hn { font-family: var(--mono); font-size: 0.875rem; color: var(--signal); display: block; margin-bottom: 0.4rem; letter-spacing: 0; }
.prose ol, .prose ul { padding-left: 1.4rem; }
.prose li { margin-bottom: 0.35rem; }
.prose code { font-size: 0.875em; background: var(--surface-2); padding: 0.1em 0.35em; border-radius: 2px; }
.prose em { font-style: italic; }
.codeblock { margin: 1.75rem 0; border: 1px solid var(--rule); background: var(--surface); }
.codeblock-bar { display: flex; justify-content: space-between; align-items: center; padding: 0 0 0 0.9rem; border-bottom: 1px solid var(--rule); font-family: var(--mono); font-size: 0.8125rem; color: var(--muted); }
.copy { font-family: var(--mono); font-size: 0.8125rem; min-height: 40px; padding: 0 0.9rem; background: transparent; border: 0; border-left: 1px solid var(--rule); color: var(--ink); cursor: pointer; }
.copy:hover { color: var(--accent); }
pre { margin: 0; padding: 1rem 1.1rem; overflow-x: auto; font-size: 0.9375rem; line-height: 1.55; tab-size: 2; }
.prose pre code { background: none; padding: 0; font-size: inherit; }
.tok-k { color: var(--accent); }
.tok-s { color: var(--ok); }
.tok-c { color: var(--muted); font-style: italic; }
.callout { margin: 1.75rem 0; padding: 0.9rem 1.1rem 0.9rem 1.1rem; border-left: 3px solid var(--rule); background: var(--surface); font-size: 1.0625rem; }
.callout p { margin: 0; }
.callout .kind { display: block; font-family: var(--mono); font-size: 0.8125rem; letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 0.3rem; }
.callout.why { border-left-color: var(--accent); }
.callout.why .kind { color: var(--accent); }
.callout.ask { border-left-color: var(--signal); background: transparent; border: 1px dashed var(--signal); border-left: 3px solid var(--signal); }
.callout.ask .kind { color: var(--signal); }
.callout.note .kind { color: var(--ok); }
.callout.note { border-left-color: var(--ok); }
.toc ol { list-style: none; margin: 0.5rem 0 0; padding: 0; counter-reset: toc; }
.toc li { counter-increment: toc; }
.toc a { display: flex; gap: 0.5rem; padding: 0.35rem 0; font-family: var(--mono); font-size: 0.875rem; color: var(--ink); text-decoration: none; line-height: 1.35; }
.toc a::before { content: counter(toc, decimal-leading-zero); color: var(--signal); }
.toc a:hover { color: var(--accent); }
.toc details summary { font-family: var(--mono); font-size: 0.875rem; min-height: 44px; display: flex; align-items: center; cursor: pointer; color: var(--ink); }
@media (min-width: 60rem) { .toc details summary { pointer-events: none; list-style: none; } .toc details summary::-webkit-details-marker { display: none; } }
.margin-block + .margin-block { margin-top: 1.75rem; }
.after { padding: 2.5rem 0; border-top: 1px solid var(--rule); }
.share { display: flex; flex-wrap: wrap; gap: 0.5rem 1.25rem; }
.share a, .share button { font-family: var(--mono); font-size: 0.9375rem; }

/* newsletter */
.news { border: 1px solid var(--rule); padding: 1.5rem; background: var(--surface); }
.news h3 { font-size: 1.5rem; }
.news form { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 1rem; }
.news input[type="email"] { flex: 1 1 14rem; min-height: 48px; padding: 0 0.9rem; font: inherit; font-family: var(--mono); font-size: 1rem; color: var(--ink); background: var(--ground); border: 1px solid var(--muted); }
.news .done { display: none; margin-top: 1rem; }
.news.is-success form { display: none; }
.news.is-success .done { display: block; }
.news .consent { display: flex; gap: 0.5rem; align-items: flex-start; flex-basis: 100%; font-size: 0.9375rem; color: var(--muted); }
.news .consent input { width: 1.1rem; height: 1.1rem; margin-top: 0.25rem; accent-color: var(--accent); }

/* ---------- patterns ---------- */
.three-ways { display: grid; grid-template-columns: minmax(0, 1fr); border: 1px solid var(--rule); }
.three-ways > div { padding: 1.25rem; border-bottom: 1px solid var(--rule); }
@media (min-width: 52rem) { .three-ways { grid-template-columns: repeat(3, minmax(0, 1fr)); } .three-ways > div { border-bottom: 0; } .three-ways > div + div { border-left: 1px solid var(--rule); } }
.three-ways h3 { font-size: 1.25rem; margin-bottom: 0.3rem; }
.three-ways p { margin: 0; color: var(--muted); }
.search-row { display: flex; flex-wrap: wrap; gap: 0.75rem 1.5rem; align-items: center; justify-content: space-between; margin-top: 2rem; }
.search-row input[type="search"] { flex: 1 1 22rem; min-height: 52px; padding: 0 1rem; font-family: var(--mono); font-size: 1rem; background: var(--surface); color: var(--ink); border: 1px solid var(--muted); }
.search-row select { min-height: 44px; font-family: var(--mono); font-size: 0.9375rem; background: var(--ground); color: var(--ink); border: 1px solid var(--rule); padding: 0 0.5rem; }
.pgrid { display: grid; grid-template-columns: minmax(0, 1fr); gap: 0; border-top: 1px solid var(--rule); border-left: 1px solid var(--rule); }
@media (min-width: 44rem) { .pgrid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (min-width: 72rem) { .pgrid { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
.pcard { border-right: 1px solid var(--rule); border-bottom: 1px solid var(--rule); padding: 1.25rem; display: flex; flex-direction: column; gap: 0.4rem; }
.pcard[hidden] { display: none; }
.pcard .top { display: flex; justify-content: space-between; gap: 0.5rem; flex-wrap: wrap; }
.pcard h2 { font-size: 1.3125rem; margin: 0.2rem 0; }
.pcard h2 a { color: var(--ink); text-decoration: none; }
.pcard h2 a:hover { color: var(--accent); text-decoration: underline; }
.pcard p { margin: 0; color: var(--muted); font-size: 1rem; }
.pglyph { height: 4.5rem; border: 1px dashed var(--rule); margin-bottom: 0.5rem; display: grid; place-items: center; color: var(--accent); }
.pglyph svg { width: 60%; height: 70%; }
.empty { border: 1px dashed var(--signal); padding: 2rem; margin-top: 1rem; }
.empty[hidden] { display: none; }

/* pattern detail */
.panes { border: 1px solid var(--rule); margin-top: 2rem; }
.pane-bar { display: flex; flex-wrap: wrap; justify-content: space-between; border-bottom: 1px solid var(--rule); }
.tabs { display: flex; flex-wrap: wrap; }
.tabs button { font-family: var(--mono); font-size: 0.9375rem; min-height: 48px; padding: 0 1rem; background: transparent; color: var(--ink); border: 0; border-right: 1px solid var(--rule); cursor: pointer; }
.tabs button[aria-selected="true"] { background: var(--ink); color: var(--ground); }
.pane-tools { display: flex; }
.pane-tools button { font-family: var(--mono); font-size: 0.875rem; min-height: 48px; padding: 0 1rem; background: transparent; color: var(--ink); border: 0; border-left: 1px solid var(--rule); cursor: pointer; }
.pane-tools button:hover, .tabs button:hover:not([aria-selected="true"]) { color: var(--accent); }
.pane { padding: 1.5rem; }
.pane[hidden] { display: none; }
.pane pre { padding: 0; font-size: 0.875rem; }
.pane .note { font-size: 1rem; color: var(--muted); border-left: 3px solid var(--accent); padding-left: 0.9rem; margin-bottom: 1.25rem; }
.prompt-text { font-size: 1.0625rem; max-width: 44rem; }
.usecases { columns: 2 16rem; padding-left: 1.2rem; }

/* the demo pattern itself */
.hss-cap { font-size: 1rem; color: var(--muted); margin: 0 0 0.75rem; }
.hss-strip { display: grid; gap: 1px; background: var(--rule); border: 1px solid var(--rule); grid-template-columns: minmax(0, 1fr); margin-bottom: 2rem; }
@media (min-width: 21rem) { .hss-strip { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (min-width: 46rem) { .hss-strip { grid-template-columns: repeat(4, minmax(0, 1fr)); } .hss-strip.five { grid-template-columns: repeat(5, minmax(0, 1fr)); } }
@media (min-width: 46rem) and (max-width: 60rem) { .hss-strip.five { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
.hss-tile { background: var(--ground); padding: 0.9rem 1rem; display: flex; flex-direction: column; gap: 0.15rem; min-width: 0; text-align: left; font: inherit; color: var(--ink); border: 0; }
button.hss-tile { cursor: pointer; }
button.hss-tile:hover { background: var(--surface); }
button.hss-tile[aria-pressed="true"] { background: color-mix(in srgb, var(--accent) 18%, var(--ground)); box-shadow: inset 0 -3px 0 var(--accent); }
.hss-l { font-family: var(--mono); font-size: 0.8125rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); overflow-wrap: anywhere; }
.hss-v { font-size: 1.75rem; line-height: 1.15; font-variant-numeric: tabular-nums; }
.hss-v.none { color: var(--muted); }
.hss-u { font-size: 0.9375rem; color: var(--muted); }
.dl-list { list-style: none; padding: 0; margin: 0 0 0.75rem; }
.dl-list li { display: flex; justify-content: space-between; gap: 1rem; padding: 0.55rem 0; border-bottom: 1px dashed var(--rule); }
.dl-list li[hidden] { display: none; }
.pager { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; padding: 2rem 0; border-top: 1px solid var(--rule); margin-top: 3rem; }
.pager a { font-family: var(--mono); font-size: 0.9375rem; min-height: 44px; display: inline-flex; align-items: center; }

/* about */
.timeline { list-style: none; padding: 0; margin: 0; }
.timeline > li { display: grid; grid-template-columns: minmax(0, 1fr); gap: 0.25rem 2rem; padding: 1.5rem 0; border-top: 1px solid var(--rule); }
@media (min-width: 48rem) { .timeline > li { grid-template-columns: 10rem minmax(0, 1fr); } }
.timeline h3 { font-size: 1.5rem; margin-bottom: 0.3rem; }
.timeline .roles { list-style: none; padding: 0; margin: 0.75rem 0 0; }
.timeline .roles li { padding: 0.3rem 0; color: var(--muted); }
.timeline .roles li strong { color: var(--ink); font-weight: 400; }
.careerbar { display: flex; flex-wrap: wrap; gap: 0; border: 1px solid var(--rule); margin: 1.5rem 0; }
.careerbar span { flex: 1 1 8rem; padding: 0.6rem 0.75rem; font-family: var(--mono); font-size: 0.8125rem; color: var(--muted); border-right: 1px solid var(--rule); border-bottom: 1px solid var(--rule); margin: 0 -1px -1px 0; }
.careerbar span b { display: block; color: var(--ink); font-weight: 400; font-size: 0.9375rem; }
.principles { list-style: none; padding: 0; margin: 0; counter-reset: pr; }
.principles li { counter-increment: pr; font-size: clamp(1.375rem, 2.6vw, 1.875rem); line-height: 1.3; font-style: italic; padding: 1rem 0; border-top: 1px solid var(--rule); display: grid; grid-template-columns: 3rem minmax(0, 1fr); }
.principles li::before { content: counter(pr, decimal-leading-zero); font-family: var(--mono); font-style: normal; font-size: 0.875rem; color: var(--signal); padding-top: 0.6rem; }
.skills { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-top: 0.75rem; }

/* footer */
.site-foot { border-top: 1px solid var(--rule); margin-top: 3rem; padding: 3rem 0 2rem; }
.foot-grid { display: grid; gap: 2rem; grid-template-columns: minmax(0, 1fr); }
@media (min-width: 44rem) { .foot-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (min-width: 64rem) { .foot-grid { grid-template-columns: 1.4fr 1fr 1fr 1.4fr; } }
.foot-grid h2 { font-family: var(--mono); font-size: 0.875rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); margin-bottom: 0.75rem; }
.foot-grid ul { list-style: none; padding: 0; margin: 0; }
.foot-grid li a { display: inline-flex; min-height: 36px; align-items: center; color: var(--ink); }
.foot-grid li a:hover { color: var(--accent); }
.foot-grid form { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.foot-grid input { flex: 1 1 10rem; min-height: 44px; padding: 0 0.75rem; font-family: var(--mono); font-size: 0.9375rem; color: var(--ink); background: var(--surface); border: 1px solid var(--muted); }
.receipt { margin-top: 2.5rem; padding-top: 1.25rem; border-top: 1px dashed var(--rule); display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0.75rem 2rem; font-family: var(--mono); font-size: 0.8125rem; color: var(--muted); }
.receipt p { margin: 0; max-width: 52rem; }

@media (prefers-reduced-motion: no-preference) {
  a, button, .btn { transition: color 150ms, background-color 150ms, border-color 150ms; }
}
@media print {
  .site-head .meter, .lights, .site-foot form, .news { display: none; }
  body { background: #fff; color: #000; }
}

.h3 { font-size: 1.375rem; }
h2.label { font-size: 0.875rem; }
@media (max-width: 40rem) { .wordmark small { display: none; } .head-row { flex-wrap: wrap; } }

/* gallery article */
.prose blockquote.callout p + p { margin-top: .75rem; }
.prose figure.dither { margin: 1.75rem 0; }
.prose code { overflow-wrap: anywhere; }