/* leopinero.com — site.css
   Uses only the custom properties in tokens.css. Load tokens.css first.
   Breakpoints (keep in sync with --bp-* in tokens.css): 40em desktop, 60em wide. */

/* ==== 1. Base ==== */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-text);
  font-size: var(--size-body);
  line-height: var(--leading-body);
  font-variant-numeric: oldstyle-nums proportional-nums;
  font-kerning: normal;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  counter-reset: sidenote;
}
::selection { background: var(--color-selection); }
img, svg, video { max-width: 100%; height: auto; display: block; }
:focus-visible { outline: 2px solid var(--color-focus); outline-offset: 2px; border-radius: var(--radius-1); }

.skip-link { position: absolute; left: var(--page-pad); top: -10rem; padding: var(--space-2) var(--space-3);
  background: var(--color-bg); color: var(--color-text); font: var(--size-meta)/1 var(--font-mono);
  letter-spacing: var(--tracking-meta); text-transform: uppercase; z-index: 10; }
.skip-link:focus { top: var(--space-2); }

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

/* ==== 2. Page frame ==== */
.page {
  max-width: calc(var(--measure) + 2 * var(--page-pad));
  margin: 0 auto;
  padding: 0 var(--page-pad);
}
@media (min-width: 60em) {
  .page { max-width: calc(var(--measure) + var(--margin-gap) + var(--margin-col) + 2 * var(--page-pad)); }
}
main { display: block; padding-bottom: var(--space-8); }
/* Text blocks keep the measure; wide blocks opt out with .wide */
main > *, .prose > * { max-width: var(--measure); }
main > .wide, .prose > .wide { max-width: none; }

/* ==== 3. Header + footer ==== */
.site-header {
  display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between;
  gap: var(--space-2) var(--space-5);
  padding: var(--space-5) 0 var(--space-3);
  margin-bottom: var(--space-7);
  border-bottom: var(--rule-width) solid var(--color-rule);
}
.site-name { font-weight: var(--weight-strong); text-decoration: none; color: var(--color-text); }
.site-nav { display: flex; flex-wrap: wrap; align-items: baseline; gap: var(--space-2) var(--space-5);
  margin: 0; padding: 0; list-style: none; }
.site-nav a, .theme-toggle {
  font-family: var(--font-mono); font-size: var(--size-meta); letter-spacing: var(--tracking-meta);
  text-transform: uppercase; color: var(--color-text-muted); text-decoration: none;
}
.site-nav a:hover { color: var(--color-text); }
.site-nav a[aria-current="page"] { color: var(--color-text); text-decoration: underline;
  text-decoration-color: var(--color-accent); text-underline-offset: 0.35em; text-decoration-thickness: 1px; }
.theme-toggle { background: none; border: 0; padding: 0; cursor: pointer; }
.theme-toggle:hover { color: var(--color-text); }
.theme-toggle[hidden] { display: none; }

.site-footer {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: var(--space-2) var(--space-5);
  padding: var(--space-4) 0 var(--space-6);
  border-top: var(--rule-width) solid var(--color-rule);
  font-family: var(--font-mono); font-size: var(--size-meta); letter-spacing: var(--tracking-meta);
  text-transform: uppercase; color: var(--color-text-faint);
}
.site-footer a { color: inherit; }

/* ==== 4. Text ==== */
h1, h2, h3, h4 { font-weight: var(--weight-strong); line-height: var(--leading-tight); margin: 0;
  text-wrap: balance; font-variant-numeric: lining-nums; }
h1 { font-size: var(--size-h1); margin-bottom: var(--space-3); letter-spacing: -0.01em; }
h2 { font-size: var(--size-h2); margin: var(--space-7) 0 var(--space-3); }
h3 { font-size: var(--size-h3); margin: var(--space-6) 0 var(--space-2); }
h4 { font-size: var(--size-body); font-style: italic; font-weight: var(--weight-regular); margin: var(--space-5) 0 var(--space-1); }
p, ul, ol, dl, pre, blockquote, figure, .table-wrap { margin: 0 0 var(--space-4); }
ul, ol { padding-left: 1.4em; }
li + li { margin-top: var(--space-1); }
hr { border: 0; border-top: var(--rule-width) solid var(--color-rule); margin: var(--space-7) 0; }
strong, b { font-weight: var(--weight-strong); }
small { font-size: var(--size-small); }
abbr[title] { text-decoration: none; font-variant: all-small-caps; letter-spacing: 0.03em; }

.lede { font-size: var(--size-h3); line-height: 1.5; color: var(--color-text-muted); }

/* Mono label: dates, kinds, file sizes, small UI text. Always caps. */
.meta {
  font-family: var(--font-mono); font-size: var(--size-meta); line-height: var(--leading-small);
  letter-spacing: var(--tracking-meta); text-transform: uppercase; color: var(--color-text-faint);
  font-variant-numeric: tabular-nums;
}
.meta > * + *::before { content: "·"; margin: 0 0.6em; }
.meta-list { display: flex; flex-wrap: wrap; margin: 0; padding: 0; list-style: none; }
.meta-list li + li { margin-top: 0; }

/* ==== 5. Links ==== */
a {
  color: inherit;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
  text-decoration-color: var(--color-link-line);
  transition: text-decoration-color 120ms ease;
}
a:hover { text-decoration-color: var(--color-accent); }
@media (prefers-reduced-motion: reduce) { a { transition: none; } }

/* External: a small arrow. Any absolute http(s) link not on leopinero.com, except PDFs and DOIs. */
a[href^="http"]:not([href^="https://leopinero.com"]):not([href$=".pdf"]):not([href^="https://doi.org/"]):not(.no-marker)::after {
  content: ""; display: inline-block; width: 0.55em; height: 0.55em; margin-left: 0.18em;
  vertical-align: 0.3em; background-color: currentColor; opacity: 0.6;
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 10 10'%3E%3Cpath d='M2 1h7v7M9 1 1 9' fill='none' stroke='%23000' stroke-width='1.4'/%3E%3C/svg%3E") center / contain no-repeat;
          mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 10 10'%3E%3Cpath d='M2 1h7v7M9 1 1 9' fill='none' stroke='%23000' stroke-width='1.4'/%3E%3C/svg%3E") center / contain no-repeat;
}
/* PDF and DOI: a mono tag after the link text */
a[href$=".pdf"]:not(.no-marker)::after,
a[href^="https://doi.org/"]:not(.no-marker)::after {
  font-family: var(--font-mono); font-size: 0.62em; letter-spacing: var(--tracking-meta);
  margin-left: 0.35em; color: var(--color-text-faint); vertical-align: 0.15em; text-decoration: none;
  display: inline-block;
}
a[href$=".pdf"]:not(.no-marker)::after { content: "PDF"; }
a[href^="https://doi.org/"]:not(.no-marker)::after { content: "DOI"; }

/* ==== 6. Code ==== */
code, kbd, samp, pre { font-family: var(--font-mono); font-size: var(--size-code); font-variant-numeric: tabular-nums; }
:not(pre) > code { background: var(--color-bg-alt); padding: 0.1em 0.3em; border-radius: var(--radius-1); }
pre {
  background: var(--color-bg-alt); padding: var(--space-4); border-radius: var(--radius-1);
  overflow-x: auto; line-height: 1.55; tab-size: 4;
}
pre code { background: none; padding: 0; font-size: inherit; }
/* Optional syntax colours (Zola's class-based highlighting): kept to greys + accent */
pre .z-comment, pre .comment { color: var(--color-text-faint); font-style: normal; }
pre .z-keyword, pre .keyword { color: var(--color-text); font-weight: var(--weight-regular); }
pre .z-string, pre .string { color: var(--color-text-muted); }

/* ==== 7. Quote ==== */
blockquote {
  margin-left: 0; padding-left: var(--space-4);
  border-left: var(--rule-width) solid var(--color-text-faint);
  color: var(--color-text-muted);
}
blockquote p:last-child { margin-bottom: 0; }
blockquote footer { display: block; margin-top: var(--space-2); font-style: normal;
  font-family: var(--font-mono); font-size: var(--size-meta); letter-spacing: var(--tracking-meta);
  text-transform: uppercase; color: var(--color-text-faint); }

blockquote cite { font-style: normal; }

/* ==== 8. Table ==== */
.table-wrap { overflow-x: auto; }           /* the table scrolls, never the page */
table { border-collapse: collapse; width: 100%; font-size: var(--size-small);
  font-variant-numeric: lining-nums tabular-nums; }
caption { caption-side: top; text-align: left; padding-bottom: var(--space-2);
  font-family: var(--font-mono); font-size: var(--size-meta); letter-spacing: var(--tracking-meta);
  text-transform: uppercase; color: var(--color-text-faint); }
th, td { text-align: left; padding: var(--space-2) var(--space-4) var(--space-2) 0; vertical-align: baseline;
  border-bottom: var(--rule-width) solid var(--color-rule); }
th { font-weight: var(--weight-strong); border-bottom-color: var(--color-text); }
th:last-child, td:last-child { padding-right: 0; }
.num { text-align: right; }

/* ==== 9. Figure ==== */
.fig { margin: var(--space-6) 0; }
.fig img, .fig svg { width: 100%; }
/* Drawings too detailed to shrink: scroll sideways on phones instead of becoming unreadable */
.fig-scroll { overflow-x: auto; }
.fig-scroll > svg { min-width: var(--figure-min); }
.fig figcaption { margin-top: var(--space-2); font-size: var(--size-small); line-height: var(--leading-small);
  color: var(--color-text-muted); }
.fig-label { font-family: var(--font-mono); font-size: var(--size-meta); letter-spacing: var(--tracking-meta);
  text-transform: uppercase; color: var(--color-text-faint); margin-right: 0.5em; }
/* Line drawings: stroke/fill take the theme colours */
.drawing { color: var(--color-text); }
.drawing .ink { stroke: currentColor; fill: none; }
.drawing .ink-faint { stroke: var(--color-text-faint); fill: none; }
.drawing .ink-accent { stroke: var(--color-accent); fill: none; }
.drawing .dot { fill: currentColor; }
.drawing text { fill: var(--color-text-faint); font-family: var(--font-mono); letter-spacing: 0.04em; }
@media (min-width: 60em) {
  .fig.wide { width: calc(var(--measure) + var(--margin-gap) + var(--margin-col)); }
}

/* ==== 10. Sidenotes ====
   Markup: <span class="sn"><label for="sn-1" class="sn-ref"></label><input type="checkbox" id="sn-1" class="sn-toggle"><span class="sn-body">…</span></span>
   Wide screens: the note floats into the margin column. Narrow: tap the number to open it inline. No JavaScript. */
.sn-ref { counter-increment: sidenote; cursor: pointer; }
.sn-ref::after {
  content: counter(sidenote);
  font-family: var(--font-mono); font-size: 0.62em; vertical-align: 0.55em; line-height: 0;
  margin-left: 0.1em; padding: 0 0.1em; color: var(--color-accent);
}
.sn-toggle { position: absolute; opacity: 0; width: 1px; height: 1px; pointer-events: none; }
.sn:has(.sn-toggle:focus-visible) .sn-ref::after { outline: 2px solid var(--color-focus); outline-offset: 2px; }
.sn-body {
  display: none;
  font-size: var(--size-small); line-height: var(--leading-small); color: var(--color-text-muted);
  font-variant-numeric: oldstyle-nums;
}
.sn-body::before {
  content: counter(sidenote) " ";
  font-family: var(--font-mono); font-size: 0.8em; color: var(--color-text-faint);
}
.sn-toggle:checked + .sn-body {
  display: block; margin: var(--space-2) 0 var(--space-3) var(--space-4);
  padding-left: var(--space-3); border-left: var(--rule-width) solid var(--color-rule);
}
@media (min-width: 60em) {
  .sn-ref { cursor: default; }
  .sn-body, .sn-toggle:checked + .sn-body {
    display: block; float: right; clear: right;
    width: var(--margin-col);
    margin: 0.3em calc(-1 * (var(--margin-col) + var(--margin-gap))) var(--space-4) 0;
    padding: 0; border: 0;
  }
}

/* ==== 11. Article ==== */
.article-head { margin-bottom: var(--space-6); }
.article-head .meta { margin-top: var(--space-2); }

/* ==== 12. Home ==== */
.home { display: grid; gap: var(--space-5); }
.home-name { font-size: var(--size-name); margin: 0; }
.home-bio p:last-child { margin-bottom: 0; }
.home-photo { margin: 0; }
.home-photo img { width: 100%; max-width: var(--photo-max); aspect-ratio: 3 / 4; object-fit: cover; }
.home-photo figcaption { margin-top: var(--space-2); }
.link-list { list-style: none; padding: 0; margin: 0; border-top: var(--rule-width) solid var(--color-rule); }
.link-list li { display: grid; grid-template-columns: 1fr; align-items: baseline;
  margin: 0; padding: var(--space-2) 0; border-bottom: var(--rule-width) solid var(--color-rule); }
@media (min-width: 40em) { .link-list li { grid-template-columns: var(--col-label) 1fr; gap: var(--space-4); } }
.link-list .meta { margin: 0; }
.link-list a { overflow-wrap: anywhere; }
@media (min-width: 60em) {
  .home { grid-template-columns: var(--measure) var(--margin-col); column-gap: var(--margin-gap);
    max-width: none; align-items: start; }
  .home > :not(.home-photo) { grid-column: 1; }
  .home-photo { grid-column: 2; grid-row: 1 / span 4; }
  .home-photo img { max-width: none; }
}

/* ==== 13. Documents directory ==== */
.doc-index { display: flex; flex-wrap: wrap; gap: var(--space-1) var(--space-5); margin: 0 0 var(--space-6);
  padding: 0; list-style: none; }
.doc-index li { margin: 0; }
.doc-index a { font-family: var(--font-mono); font-size: var(--size-meta); letter-spacing: var(--tracking-meta);
  text-transform: uppercase; color: var(--color-text-muted); }
.doc-index .count, .doc-group .count { color: var(--color-text-faint); margin-left: 0.4em; font-family: var(--font-mono);
  font-size: var(--size-meta); font-weight: var(--weight-regular); letter-spacing: var(--tracking-meta); }
.doc-group { scroll-margin-top: var(--space-5); }
.doc-group h2 { margin-top: var(--space-6); padding-bottom: var(--space-2);
  border-bottom: var(--rule-width) solid var(--color-text); }
main > .doc-group { max-width: none; }
.doc-list { list-style: none; margin: 0; padding: 0; }
.doc { margin: 0; padding: var(--space-3) 0; border-bottom: var(--rule-width) solid var(--color-rule);
  display: grid; grid-template-columns: 1fr; gap: var(--space-1); }
.doc-title { font-weight: var(--weight-strong); line-height: 1.35; margin: 0; font-size: var(--size-body); }
.doc-desc { color: var(--color-text-muted); margin: 0; line-height: 1.45; }
.doc-date, .doc-meta { margin: 0; }
@media (min-width: 40em) {
  .doc { grid-template-columns: var(--col-date) 1fr; column-gap: var(--space-5); }
  .doc-date { grid-row: 1 / span 3; padding-top: 0.32em; }
}
@media (min-width: 60em) {
  .doc { grid-template-columns: var(--col-date) minmax(0, 1fr) var(--col-doc-meta); }
  .doc-date { grid-row: 1 / span 2; }
  .doc-meta { grid-column: 3; grid-row: 1 / span 2; text-align: right; padding-top: 0.32em; }
  .doc-meta.meta-list { display: block; }
  .doc-meta.meta-list > li { display: block; }
  .doc-meta.meta-list > li::before { content: none; }
}

/* ==== 14b. Provenance: who wrote this ====
   Every article and list entry says who wrote it. Three kinds:
   human (Leonardo), human edited with an LLM, and LLM-generated. */

/* Notice at the top of every LLM-generated page, and atop the Generated index */
.provenance {
  margin: 0 0 var(--space-5); padding: var(--space-3) var(--space-4);
  border: var(--rule-width) solid var(--color-text); background: var(--color-bg-alt);
}
.provenance-label {
  margin: 0 0 var(--space-1);
  font-family: var(--font-mono); font-size: var(--size-meta); letter-spacing: var(--tracking-meta);
  text-transform: uppercase; color: var(--color-text); line-height: var(--leading-small);
}
.provenance p:not(.provenance-label) { margin: 0; font-size: var(--size-small); line-height: var(--leading-small); }

/* Key/value facts under every article title: written, updated, author, review */
.article-facts {
  display: grid; grid-template-columns: max-content minmax(0, 1fr); gap: var(--space-1) var(--space-4);
  margin: 0 0 var(--space-6); padding: var(--space-3) 0;
  border-top: var(--rule-width) solid var(--color-rule); border-bottom: var(--rule-width) solid var(--color-rule);
  font-size: var(--size-small); line-height: var(--leading-small);
}
.article-facts dt {
  font-family: var(--font-mono); font-size: var(--size-meta); letter-spacing: var(--tracking-meta);
  text-transform: uppercase; color: var(--color-text-faint); padding-top: 0.15em;
}
.article-facts dd { margin: 0; }

/* Small boxed tag in lists: LLM, LLM-edited, Reviewed */
.tag {
  display: inline-block; padding: 0.2em 0.45em 0.15em; line-height: 1.2;
  border: var(--rule-width) solid currentColor;
  font-family: var(--font-mono); font-size: var(--size-meta); letter-spacing: var(--tracking-meta);
  text-transform: uppercase; color: var(--color-text-muted); white-space: nowrap;
}
.tag--llm { color: var(--color-text); }

/* End of article: corrections and comments go by email */
.reply {
  margin-top: var(--space-7); padding-top: var(--space-3);
  border-top: var(--rule-width) solid var(--color-rule);
  font-size: var(--size-small); color: var(--color-text-muted);
}

/* Obfuscated email: a plain-text fallback until site.js builds the link */
a.email:not([href]) { text-decoration: none; }

/* ==== 14. 404 ==== */
.notfound-code { font-family: var(--font-mono); font-size: var(--size-meta); letter-spacing: var(--tracking-meta);
  text-transform: uppercase; color: var(--color-text-faint); margin-bottom: var(--space-2); }

/* ==== 15. Print ==== */
@media print {
  .site-nav, .theme-toggle, .skip-link { display: none; }
  body { background: #fff; color: #000; }
  .sn-body { display: block; float: none; width: auto; margin: var(--space-2) 0; }
  a[href^="http"]::after { content: " (" attr(href) ")"; -webkit-mask: none; mask: none; background: none;
    width: auto; height: auto; font-size: 0.8em; opacity: 1; }
}