/* Callout — site stylesheet
   No external fonts, no frameworks, no build step.
   Design notes: /log/decisions.jsonl (category "design"). */

:root {
  /* Ink and paper */
  --paper: #fbfaf6;
  --paper-2: #f3f1ea;
  --ink: #1c1b18;
  --ink-2: #4a4740;
  --ink-3: #6f6b61;
  --rule: #d9d5ca;

  /* Accent: "callout" ochre, used sparingly */
  --accent: #b4540a;
  --accent-ink: #8a3f05;
  --accent-wash: #fbeedd;

  /* Admonition colours */
  --note-bar: #2f5d8a;
  --note-wash: #e9f0f7;
  --ai-bar: #b4540a;
  --ai-wash: #fbeedd;
  --warn-bar: #9a2a2a;
  --warn-wash: #f8e8e6;
  --tip-bar: #3c6e47;
  --tip-wash: #e8f1ea;
  --sponsor-bar: #6b5a8e;
  --sponsor-wash: #efebf6;

  --link: #1f4f7a;
  --link-hover: #8a3f05;
  --focus: #b4540a;

  /* Type */
  --serif: "Iowan Old Style", "Charter", "Bitstream Charter", "Sitka Text", Cambria, Georgia, serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;

  --measure: 68ch;
  --wide: 72rem;
  --gutter: clamp(1rem, 4vw, 2rem);
  --radius: 4px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #16150f;
    --paper-2: #1f1d17;
    --ink: #ece8dd;
    --ink-2: #c9c4b7;
    --ink-3: #a19c8f;
    --rule: #3a372e;
    --accent: #e08a3c;
    --accent-ink: #f0a765;
    --accent-wash: #2e2114;
    --note-bar: #7fa7cf;
    --note-wash: #18222c;
    --ai-bar: #e08a3c;
    --ai-wash: #2e2114;
    --warn-bar: #e08080;
    --warn-wash: #2d1919;
    --tip-bar: #86b891;
    --tip-wash: #172319;
    --sponsor-bar: #b3a3d6;
    --sponsor-wash: #221d2c;
    --link: #9cc3e8;
    --link-hover: #f0a765;
    --focus: #f0a765;
  }
}

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

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: clamp(1.0625rem, 0.98rem + 0.35vw, 1.1875rem);
  line-height: 1.6;
  font-kerning: normal;
  text-rendering: optimizeLegibility;
}

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

a { color: var(--link); text-decoration-thickness: 1px; text-underline-offset: 0.18em; }
a:hover { color: var(--link-hover); }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; border-radius: 2px; }

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

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

/* ---------- Layout ---------- */

.wrap { max-width: var(--wide); margin: 0 auto; padding: 0 var(--gutter); }
.measure { max-width: var(--measure); }

/* ---------- Disclosure bar (every page) ---------- */

.disclosure-bar {
  background: var(--ai-wash);
  border-bottom: 1px solid var(--rule);
  font-family: var(--sans);
  font-size: 0.875rem;
  line-height: 1.45;
}
.disclosure-bar .wrap { display: flex; gap: 0.6rem; align-items: baseline; padding-top: 0.55rem; padding-bottom: 0.55rem; }
.disclosure-bar .tag {
  flex: none;
  font-weight: 700; letter-spacing: 0.04em; text-transform: uppercase; font-size: 0.72rem;
  color: var(--paper); background: var(--ai-bar); padding: 0.1rem 0.4rem; border-radius: 2px;
}
.disclosure-bar p { margin: 0; color: var(--ink); }

/* ---------- Masthead ---------- */

.masthead { border-bottom: 1px solid var(--ink); }
.masthead .wrap {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: 0.75rem 1.5rem; padding-top: 1.1rem; padding-bottom: 1.1rem;
}
.wordmark {
  display: inline-flex; align-items: center; gap: 0.55rem;
  font-family: var(--serif); font-weight: 700; font-size: 1.75rem; letter-spacing: -0.01em;
  color: var(--ink); text-decoration: none; line-height: 1;
}
.wordmark::before {
  content: ""; width: 6px; height: 1.9rem; background: var(--accent); border-radius: 1px;
}
.wordmark:hover { color: var(--ink); }
.site-nav ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 0.25rem 1.25rem; }
.site-nav li + li, .site-footer li + li { margin-top: 0; }
.site-footer li { padding: 0.15rem 0; }
.site-nav a {
  font-family: var(--sans); font-size: 0.9375rem; color: var(--ink-2); text-decoration: none;
  padding: 0.25rem 0; border-bottom: 2px solid transparent;
}
.site-nav a:hover { color: var(--ink); border-bottom-color: var(--rule); }
.site-nav a[aria-current="page"] { color: var(--ink); border-bottom-color: var(--accent); }

/* ---------- Type ---------- */

h1, h2, h3, h4 { font-family: var(--serif); line-height: 1.2; letter-spacing: -0.01em; margin: 2rem 0 0.75rem; text-wrap: balance; }
h1 { font-size: clamp(2rem, 1.5rem + 2.4vw, 3.25rem); margin-top: 0; }
h2 { font-size: clamp(1.4rem, 1.2rem + 0.9vw, 1.9rem); }
h3 { font-size: 1.2rem; }
p { margin: 0 0 1.1rem; }
ul, ol { padding-left: 1.3rem; margin: 0 0 1.1rem; }
li + li { margin-top: 0.3rem; }
hr { border: 0; border-top: 1px solid var(--rule); margin: 2.5rem 0; }
strong { font-weight: 700; }
small, .small { font-size: 0.875rem; }

.kicker {
  font-family: var(--sans); font-size: 0.78rem; font-weight: 700; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--accent-ink); margin: 0 0 0.6rem;
}
.dek { font-size: 1.25rem; line-height: 1.45; color: var(--ink-2); margin: 0 0 1.5rem; max-width: 40ch; }
.lede { font-size: 1.2rem; color: var(--ink-2); }
.meta { font-family: var(--sans); font-size: 0.875rem; color: var(--ink-3); }

code, kbd, pre { font-family: var(--mono); font-size: 0.88em; }
:not(pre) > code { background: var(--paper-2); padding: 0.08em 0.3em; border-radius: 3px; border: 1px solid var(--rule); }
pre {
  background: var(--paper-2); border: 1px solid var(--rule); border-radius: var(--radius);
  padding: 1rem 1.1rem; overflow-x: auto; line-height: 1.5; margin: 0 0 1.4rem;
}

/* ---------- Callouts (admonitions) ---------- */

.callout {
  border-left: 5px solid var(--note-bar); background: var(--note-wash);
  padding: 0.95rem 1.1rem 0.95rem 1.1rem; margin: 1.5rem 0; border-radius: 0 var(--radius) var(--radius) 0;
  font-family: var(--sans); font-size: 0.97rem; line-height: 1.55;
}
.callout > :last-child { margin-bottom: 0; }
.callout-title {
  display: block; font-weight: 700; font-size: 0.75rem; letter-spacing: 0.08em; text-transform: uppercase;
  margin-bottom: 0.35rem; color: var(--note-bar);
}
.callout.ai { border-left-color: var(--ai-bar); background: var(--ai-wash); }
.callout.ai .callout-title { color: var(--ai-bar); }
.callout.warning { border-left-color: var(--warn-bar); background: var(--warn-wash); }
.callout.warning .callout-title { color: var(--warn-bar); }
.callout.tip { border-left-color: var(--tip-bar); background: var(--tip-wash); }
.callout.tip .callout-title { color: var(--tip-bar); }
.callout.sponsor { border-left-color: var(--sponsor-bar); background: var(--sponsor-wash); }
.callout.sponsor .callout-title { color: var(--sponsor-bar); }
.callout.placeholder {
  border: 2px dashed var(--warn-bar); border-left-width: 5px; border-left-style: solid;
  background: var(--warn-wash);
}
.callout.placeholder .callout-title { color: var(--warn-bar); }
.callout.big { font-size: 1.05rem; padding: 1.25rem 1.4rem; }
.callout.big .callout-title { font-size: 0.8rem; }

/* ---------- Home ---------- */

.hero { padding: clamp(2.5rem, 6vw, 4.5rem) 0 2rem; border-bottom: 1px solid var(--rule); }
.hero-grid { display: grid; gap: 2rem; grid-template-columns: 1fr; align-items: end; }
@media (min-width: 60rem) { .hero-grid { grid-template-columns: 1.4fr 1fr; gap: 3rem; } }
.hero h1 { max-width: 16ch; }

.issue-banner {
  border: 1px solid var(--ink); padding: 1.25rem 1.3rem; background: var(--paper);
  font-family: var(--sans);
}
.issue-banner .label { font-size: 0.75rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-3); }
.issue-banner .title { font-family: var(--serif); font-size: 1.6rem; font-weight: 700; margin: 0.35rem 0 0.4rem; line-height: 1.2; }
.issue-banner p { font-size: 0.95rem; color: var(--ink-2); margin-bottom: 0.6rem; }

.section { padding: 2.75rem 0; border-bottom: 1px solid var(--rule); }
.section:last-of-type { border-bottom: 0; }
.section-head { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: baseline; gap: 0.5rem 1rem; margin-bottom: 1.25rem; }
.section-head h2 { margin: 0; }

.cards { display: grid; gap: 1.25rem; grid-template-columns: 1fr; }
@media (min-width: 40rem) { .cards { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 64rem) { .cards { grid-template-columns: repeat(3, 1fr); } }
.card {
  border-top: 3px solid var(--ink); padding-top: 0.9rem;
  display: flex; flex-direction: column; gap: 0.4rem;
}
.card h3 { margin: 0; font-size: 1.2rem; }
.card h3 a { color: var(--ink); text-decoration: none; }
.card h3 a:hover { text-decoration: underline; }
.card p { margin: 0; color: var(--ink-2); font-size: 0.98rem; }
.card .format { font-family: var(--sans); font-size: 0.72rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent-ink); }
.card.placeholder-card { border-top-style: dashed; border-top-color: var(--warn-bar); }
.pill-placeholder {
  display: inline-block; font-family: var(--sans); font-size: 0.7rem; font-weight: 700; letter-spacing: 0.06em;
  text-transform: uppercase; color: var(--warn-bar); border: 1px solid var(--warn-bar); border-radius: 2px;
  padding: 0.05rem 0.35rem; align-self: flex-start;
}

.format-list { display: grid; gap: 0; grid-template-columns: 1fr; border-top: 1px solid var(--rule); }
@media (min-width: 48rem) { .format-list { grid-template-columns: repeat(2, 1fr); column-gap: 2.5rem; } }
.format-list div { border-bottom: 1px solid var(--rule); padding: 0.9rem 0; }
.format-list dt { font-weight: 700; }
.format-list dt span { font-family: var(--sans); font-weight: 400; font-size: 0.85rem; color: var(--ink-3); margin-left: 0.35rem; }
.format-list dd { margin: 0.2rem 0 0; color: var(--ink-2); font-size: 0.98rem; }

.two-col { display: grid; gap: 2rem; grid-template-columns: 1fr; }
@media (min-width: 56rem) { .two-col { grid-template-columns: 1fr 1fr; gap: 3rem; } }

/* ---------- Signup ---------- */

.signup {
  background: var(--paper-2); border: 1px solid var(--rule); border-radius: var(--radius);
  padding: clamp(1.25rem, 3vw, 2rem);
}
.signup h2, .signup h3 { margin-top: 0; }
.signup form { display: flex; flex-wrap: wrap; gap: 0.6rem; margin: 0.75rem 0 0.5rem; font-family: var(--sans); }
.signup label { flex: 1 1 100%; font-size: 0.9rem; font-weight: 600; }
.signup input[type="email"] {
  flex: 1 1 16rem; min-width: 0; font: inherit; font-size: 1rem; padding: 0.65rem 0.75rem;
  border: 1px solid var(--ink-3); border-radius: var(--radius); background: var(--paper); color: var(--ink);
}
.button {
  font-family: var(--sans); font-size: 1rem; font-weight: 600; cursor: pointer;
  background: var(--ink); color: var(--paper); border: 1px solid var(--ink); border-radius: var(--radius);
  padding: 0.65rem 1.1rem; text-decoration: none; display: inline-block;
}
.button:hover { background: var(--accent-ink); border-color: var(--accent-ink); color: #fff; }
.button.secondary { background: transparent; color: var(--ink); }
.button.secondary:hover { background: var(--paper-2); color: var(--ink); border-color: var(--ink); }
.form-note { font-family: var(--sans); font-size: 0.85rem; color: var(--ink-3); margin: 0.25rem 0 0; }
.form-status { font-family: var(--sans); font-size: 0.9rem; margin-top: 0.5rem; min-height: 1.3em; color: var(--warn-bar); }

/* Brevo signup form (their script needs these ids and classes; styling is ours) */
.sib-form { text-align: left; }
.sib-form form { display: block; margin: 0.75rem 0 0.25rem; }
.sib-form .form__label-row { display: flex; flex-wrap: wrap; gap: 0.6rem; }
.sib-form .entry__label { flex: 1 1 100%; font-family: var(--sans); font-size: 0.9rem; font-weight: 600; }
.sib-form .entry__field { flex: 1 1 16rem; min-width: 0; }
.sib-form input.input { width: 100%; font: inherit; font-size: 1rem; padding: 0.65rem 0.75rem; border: 1px solid var(--ink-3); border-radius: var(--radius); background: var(--paper); color: var(--ink); }
.sib-form .sib-form-block { margin-top: 0.6rem; }
.sib-form .entry__error { display: block; font-family: var(--sans); font-size: 0.85rem; color: var(--warn-bar); margin-top: 0.35rem; }
.sib-form .entry__error:empty { display: none; }
.sib-form .input--hidden { position: absolute !important; left: -9999px; width: 1px; height: 1px; opacity: 0; }
.sib-form .sib-hide-loader-icon { display: none; }
.sib-form .progress-indicator__icon { width: 1em; height: 1em; margin-right: 0.4rem; vertical-align: -0.1em; fill: currentColor; animation: sib-spin 1s linear infinite; }
@keyframes sib-spin { to { transform: rotate(360deg); } }
.sib-form-message-panel { display: none; font-family: var(--sans); font-size: 0.95rem; padding: 0.75rem 0.9rem; border-radius: var(--radius); border-left: 4px solid; margin: 0.5rem 0; }
.sib-form-message-panel--active { display: block; }
.form-panel--ok { background: var(--tip-wash); border-color: var(--tip-bar); }
.form-panel--error { background: var(--warn-wash); border-color: var(--warn-bar); }

/* ---------- Pages ---------- */

.page-head { padding: clamp(2rem, 5vw, 3.5rem) 0 1.5rem; border-bottom: 1px solid var(--rule); margin-bottom: 2rem; }
.page-body { padding-bottom: 3rem; }
.page-body h2 { border-top: 1px solid var(--rule); padding-top: 1.6rem; }
.page-body h2:first-child { border-top: 0; padding-top: 0; margin-top: 0; }

table { border-collapse: collapse; width: 100%; font-family: var(--sans); font-size: 0.93rem; margin: 0 0 1.5rem; }
th, td { text-align: left; vertical-align: top; padding: 0.55rem 0.6rem; border-bottom: 1px solid var(--rule); }
th { font-size: 0.78rem; letter-spacing: 0.05em; text-transform: uppercase; color: var(--ink-3); border-bottom: 2px solid var(--ink); }
.table-scroll { overflow-x: auto; }

.checklist { list-style: none; padding-left: 0; }
.checklist li { padding-left: 1.6rem; position: relative; }
.checklist li::before { content: "✓"; position: absolute; left: 0; color: var(--tip-bar); font-weight: 700; font-family: var(--sans); }
.crosslist { list-style: none; padding-left: 0; }
.crosslist li { padding-left: 1.6rem; position: relative; }
.crosslist li::before { content: "✕"; position: absolute; left: 0.1rem; color: var(--warn-bar); font-weight: 700; font-family: var(--sans); }

/* ---------- Article ---------- */

.article-head { padding: clamp(2rem, 5vw, 3.5rem) 0 1.75rem; border-bottom: 1px solid var(--rule); }
.article-head h1 { max-width: 22ch; }
.byline { font-family: var(--sans); font-size: 0.95rem; color: var(--ink-2); display: flex; flex-wrap: wrap; gap: 0.25rem 1rem; }
.byline strong { color: var(--ink); }

.article-layout { display: grid; grid-template-columns: 1fr; gap: 2rem; padding: 2rem 0 3rem; }
@media (min-width: 64rem) { .article-layout { grid-template-columns: 14rem minmax(0, var(--measure)); gap: 3.5rem; } }
.toc { font-family: var(--sans); font-size: 0.9rem; }
@media (min-width: 64rem) { .toc { position: sticky; top: 1.5rem; align-self: start; } }
.toc h2 { font-family: var(--sans); font-size: 0.75rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-3); margin: 0 0 0.5rem; }
.toc ol { padding-left: 1.1rem; margin: 0; }
.toc a { color: var(--ink-2); text-decoration: none; }
.toc a:hover { color: var(--ink); text-decoration: underline; }

.article-body h2 { scroll-margin-top: 1rem; }
.article-body h2 .anchor { font-family: var(--sans); font-size: 0.8em; color: var(--ink-3); text-decoration: none; margin-left: 0.35rem; opacity: 0; }
.article-body h2:hover .anchor, .article-body h2 .anchor:focus { opacity: 1; }
.article-body > p:first-of-type::first-letter { font-weight: 700; }

.pullquote {
  font-size: 1.45rem; line-height: 1.35; font-style: italic; color: var(--ink);
  border-top: 2px solid var(--ink); border-bottom: 1px solid var(--rule);
  padding: 1rem 0; margin: 2rem 0;
}
.pullquote p { margin: 0; }

figure { margin: 1.75rem 0; }
figcaption { font-family: var(--sans); font-size: 0.85rem; color: var(--ink-3); margin-top: 0.5rem; }
.figure-box {
  border: 1px dashed var(--ink-3); background: var(--paper-2); aspect-ratio: 16 / 9;
  display: grid; place-items: center; font-family: var(--sans); font-size: 0.9rem; color: var(--ink-3); text-align: center; padding: 1rem;
}

.author-box {
  display: grid; grid-template-columns: 1fr; gap: 0.5rem;
  border-top: 2px solid var(--ink); padding-top: 1rem; margin-top: 2.5rem; font-family: var(--sans); font-size: 0.95rem;
}
.author-box h2 { font-family: var(--sans); font-size: 0.75rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-3); margin: 0; border: 0; padding: 0; }
.author-box p { margin: 0; }

.corrections { font-family: var(--sans); font-size: 0.9rem; color: var(--ink-2); border-top: 1px solid var(--rule); margin-top: 2rem; padding-top: 1rem; }
.corrections h2 { font-family: var(--sans); font-size: 0.75rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-3); margin: 0 0 0.4rem; border: 0; padding: 0; }

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

.site-footer { border-top: 1px solid var(--ink); margin-top: 1rem; padding: 2rem 0 2.5rem; font-family: var(--sans); font-size: 0.9rem; color: var(--ink-2); }
.footer-grid { display: grid; gap: 1.5rem; grid-template-columns: 1fr; }
@media (min-width: 48rem) { .footer-grid { grid-template-columns: 2fr 1fr 1fr; } }
.site-footer h2 { font-family: var(--sans); font-size: 0.75rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-3); margin: 0 0 0.5rem; }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer a { color: var(--ink-2); }
.site-footer p { margin: 0 0 0.6rem; }

@media (prefers-reduced-motion: no-preference) {
  a, .button, .site-nav a { transition: color 120ms ease, background-color 120ms ease, border-color 120ms ease; }
}

@media print {
  .disclosure-bar, .site-nav, .signup, .toc, .site-footer { display: none; }
  body { background: #fff; color: #000; }
  .callout.ai { display: block; }
}