/* ---------------------------------------------------------------
   Austere long-form. No frameworks, no webfonts, no build step.
   One column, generous measure, high contrast, theme-aware.

   The palette is warm on purpose. Paper, not screen: an ivory
   ground and a warm near-black, because maximum contrast (#000 on
   #fff) causes halation and fatigue on bright displays. Every
   foreground/background pair here is measured at WCAG AA or better
   in both themes -- including the faint tones, which is the pair
   most often left failing.
   --------------------------------------------------------------- */

:root {
  color-scheme: light;

  --paper:      #f4f1e8;   /* the page itself */
  --raised:     #e9e4d6;   /* code, table zebra, marks */
  --ink:        #1f1d18;   /* 14.9:1 on paper  AAA */
  --ink-soft:   #575347;   /*  6.8:1 on paper  AA  */
  --ink-faint:  #6b6555;   /*  5.1:1 on paper, 4.6:1 on raised  AA */
  --rule:       #dcd6c6;
  --rule-soft:  #e6e0d0;
  --accent:     #9c4320;   /*  5.1:1 on raised  AA */
  --mark:       #ece5d0;

  --serif: Charter, "Bitstream Charter", "Iowan Old Style", "Palatino Linotype",
           Palatino, Georgia, "Times New Roman", serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
          "Liberation Mono", monospace;

  --measure: 40rem;
}

/* Dark is not an inversion -- it is a warm charcoal with the same
   temperature as the light theme, so the site reads as one place. */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --paper:     #191814;
    --raised:    #232119;
    --ink:       #ebe7da;   /* 14.4:1  AAA */
    --ink-soft:  #a9a294;   /*  7.0:1  AAA */
    --ink-faint: #948d7d;   /*  5.4:1 on paper, 4.9:1 on raised  AA */
    --rule:      #333027;
    --rule-soft: #2a2820;
    --accent:    #e2966a;   /*  7.5:1  AAA */
    --mark:      #2c281c;
  }
}

/* Explicit override, so a future toggle wins in both directions. */
:root[data-theme="dark"] {
  color-scheme: dark;
  --paper:     #191814;
  --raised:    #232119;
  --ink:       #ebe7da;
  --ink-soft:  #a9a294;
  --ink-faint: #948d7d;
  --rule:      #333027;
  --rule-soft: #2a2820;
  --accent:    #e2966a;
  --mark:      #2c281c;
}

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

html {
  -webkit-text-size-adjust: 100%;
  background: var(--paper);   /* no white flash behind a short page */
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.125rem;
  line-height: 1.7;
  font-kerning: normal;
  font-variant-numeric: oldstyle-num;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--mark); color: var(--ink); }

.wrap {
  max-width: var(--measure);
  margin: 0 auto;
  padding-block: 5rem 7rem;
  padding-inline: 1.5rem;
}

/* Keyboard users get a real focus ring. Never remove this without
   putting something equally visible in its place. */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}

/* --- links ---------------------------------------------------- */

a {
  color: inherit;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
  text-decoration-color: var(--rule);
  transition: text-decoration-color 140ms ease, color 140ms ease;
}
a:hover { color: var(--accent); text-decoration-color: currentColor; }

/* --- masthead ------------------------------------------------- */

.masthead { margin-bottom: 3.75rem; }

.masthead h1 {
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0 0 0.4rem;
}
.masthead h1 a { text-decoration: none; }
.masthead h1 a:hover { color: var(--accent); }

.masthead .tagline {
  margin: 0;
  color: var(--ink-soft);
  font-style: italic;
  font-size: 1.0625rem;
}

.bio { color: var(--ink-soft); font-size: 1.0625rem; line-height: 1.68; }
.bio p { margin: 0 0 0.9rem; }
.bio p:last-child { margin-bottom: 0; }

/* --- index listing -------------------------------------------- */

.section { margin-top: 3.75rem; }

.section > h2 {
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.11em;
  font-variant-numeric: normal;
  color: var(--ink-faint);
  margin: 0 0 1.5rem;
  padding-bottom: 0.55rem;
  border-bottom: 1px solid var(--rule);
}

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

.entries li {
  margin-bottom: 2.25rem;
  /* A quiet hit area, so the whole entry feels like one object
     rather than three separate scraps of text. */
  padding: 0.15rem 0;
}
.entries li:last-child { margin-bottom: 0; }

.entry-title {
  display: block;
  font-size: 1.25rem;
  font-weight: 600;
  text-decoration: none;
  line-height: 1.32;
  letter-spacing: -0.008em;
}
.entry-title:hover { color: var(--accent); }

.entry-meta {
  display: block;
  margin-top: 0.3rem;
  font-size: 0.9375rem;
  color: var(--ink-faint);
  line-height: 1.5;
}

.entry-summary {
  margin: 0.55rem 0 0;
  font-size: 1.0625rem;
  color: var(--ink-soft);
  line-height: 1.62;
}

.empty { color: var(--ink-faint); font-style: italic; }

/* --- post ----------------------------------------------------- */

.post-header {
  margin-bottom: 3.25rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--rule-soft);
}

.post-header h1 {
  font-size: 2.125rem;
  font-weight: 600;
  line-height: 1.16;
  letter-spacing: -0.018em;
  margin: 0 0 0.7rem;
  text-wrap: balance;
}

.post-header .subtitle {
  margin: 0 0 1rem;
  font-size: 1.1875rem;
  font-style: italic;
  color: var(--ink-soft);
  line-height: 1.5;
  text-wrap: pretty;
}

.post-header .dateline {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--ink-faint);
}

.prose > :first-child { margin-top: 0; }

.prose h2 {
  font-size: 1.4375rem;
  font-weight: 600;
  line-height: 1.28;
  margin: 3.5rem 0 1.1rem;
  letter-spacing: -0.012em;
  text-wrap: balance;
}
.prose h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin: 2.5rem 0 0.8rem;
  text-wrap: balance;
}
.prose h4 {
  font-size: 1rem;
  font-weight: 600;
  font-style: italic;
  margin: 2rem 0 0.55rem;
}

.prose p { margin: 0 0 1.35rem; text-wrap: pretty; }

.prose ul, .prose ol { margin: 0 0 1.45rem; padding-left: 1.45rem; }
.prose li { margin-bottom: 0.6rem; }
.prose li > ul, .prose li > ol { margin-top: 0.6rem; margin-bottom: 0.25rem; }
.prose li::marker { color: var(--ink-faint); }

.prose strong { font-weight: 650; }

.prose hr {
  border: 0;
  border-top: 1px solid var(--rule);
  margin: 3.5rem 0;
}

.prose blockquote {
  margin: 2rem 0;
  padding: 0.15rem 0 0.15rem 1.4rem;
  border-left: 2px solid var(--accent);
  color: var(--ink);
  font-style: italic;
}
.prose blockquote p:last-child { margin-bottom: 0; }
.prose blockquote strong { font-style: normal; }
.prose blockquote h2,
.prose blockquote h3,
.prose blockquote h4 {
  font-style: normal;
  margin: 0 0 0.5rem;
  font-size: 1.125rem;
}

/* code */
.prose code {
  font-family: var(--mono);
  font-size: 0.875em;
  font-variant-numeric: normal;
  background: var(--mark);
  padding: 0.12em 0.34em;
  border-radius: 4px;
}
.prose .highlighter-rouge,
.prose .highlight { margin: 2rem 0; }
.prose .highlighter-rouge pre,
.prose .highlight pre { margin: 0; }

.prose pre {
  background: var(--raised);
  border: 1px solid var(--rule-soft);
  border-radius: 8px;
  padding: 1.15rem 1.3rem;
  margin: 2rem 0;
  overflow-x: auto;
  line-height: 1.55;
}
.prose pre code {
  background: none;
  padding: 0;
  font-size: 0.8125rem;
  white-space: pre;
}

/* tables — the one thing allowed to be wider than the measure */
.prose .table-scroll {
  overflow-x: auto;
  margin: 2rem 0;
  /* Tables are the one place the page can scroll sideways; make the
     edge legible so it reads as scrollable rather than as cut off. */
  border-bottom: 1px solid var(--rule-soft);
}
.prose table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.9375rem;
  line-height: 1.5;
}
.prose th, .prose td {
  text-align: left;
  vertical-align: top;
  padding: 0.7rem 1rem 0.7rem 0;
  border-bottom: 1px solid var(--rule-soft);
}
.prose tbody tr:last-child td { border-bottom: 0; }
.prose th {
  font-weight: 600;
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  font-variant-numeric: normal;
  color: var(--ink-faint);
  border-bottom-color: var(--rule);
  padding-top: 0;
}
.prose td:last-child, .prose th:last-child { padding-right: 0; }

/* --- footer --------------------------------------------------- */

.foot {
  margin-top: 6rem;
  padding-top: 1.4rem;
  border-top: 1px solid var(--rule);
  font-size: 0.9375rem;
  color: var(--ink-faint);
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
  justify-content: space-between;
}
.foot a { color: var(--ink-soft); }

/* --- narrow --------------------------------------------------- */

@media (max-width: 34rem) {
  body { font-size: 1.0625rem; }
  .wrap { padding-block: 3rem 4.5rem; padding-inline: 1.25rem; }
  .masthead { margin-bottom: 2.75rem; }
  .post-header h1 { font-size: 1.6875rem; }
  .post-header { margin-bottom: 2.5rem; padding-bottom: 1.5rem; }
  .prose h2 { font-size: 1.3125rem; margin-top: 2.75rem; }
  .entries li { margin-bottom: 1.85rem; }
  .prose pre { border-radius: 6px; padding: 1rem; }
}

/* --- motion --------------------------------------------------- */

/* The reader has already told the browser how they want to read. */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* --- print ---------------------------------------------------- */

@media print {
  :root {
    --paper: #fff; --raised: #f6f6f6; --ink: #000;
    --ink-soft: #333; --ink-faint: #444;
    --rule: #bbb; --rule-soft: #ddd; --mark: #f4f4f4;
  }
  .foot, .masthead .tagline { display: none; }
  .wrap { max-width: none; padding-block: 0; }
  a { text-decoration: none; }
  .prose pre, .prose .table-scroll { break-inside: avoid; }
  .prose h2, .prose h3 { break-after: avoid; }
}

/* --- colophon -------------------------------------------------- */

/* Provenance, on every post. A reader arriving from a direct link never
   sees the index, so the disclosure has to travel with the piece. */
.colophon {
  margin-top: 4rem;
  padding-top: 1.4rem;
  border-top: 1px solid var(--rule-soft);
}
.colophon p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--ink-faint);
  font-style: italic;
}
.colophon a { color: inherit; }
.colophon a:hover { color: var(--accent); }

@media print { .colophon { font-style: normal; } }

/* --- contents -------------------------------------------------- */

/* Inline, above the piece. Deliberately NOT a sticky sidebar: the
   one-column rule holds, and a rail that tracks your scroll position
   is a reading-progress bar wearing a different hat. */
.toc {
  margin: 0 0 3rem;
  padding: 1.25rem 1.5rem;
  background: var(--raised);
  border-radius: 8px;
}
.toc h4 {
  margin: 0 0 0.75rem;
  font-size: 0.75rem;
  font-weight: 600;
  font-style: normal;
  text-transform: uppercase;
  letter-spacing: 0.11em;
  color: var(--ink-faint);
}
.toc ul {
  margin: 0;
  padding: 0;
  list-style: none;
  /* Two columns where there is room; one on a phone. */
  columns: 2;
  column-gap: 2rem;
}
.toc li {
  margin: 0 0 0.4rem;
  font-size: 0.9375rem;
  line-height: 1.4;
  break-inside: avoid;
}
.toc a {
  text-decoration: none;
  color: var(--ink-soft);
}
.toc a:hover { color: var(--accent); text-decoration: underline; }

@media (max-width: 34rem) {
  .toc { columns: 1; padding: 1.1rem 1.2rem; margin-bottom: 2.25rem; }
  .toc ul { columns: 1; }
}

/* --- footnotes ------------------------------------------------- */

/* Superscript markers that do not disturb the line's rhythm. */
.prose sup[role="doc-noteref"],
.prose a.footnote {
  font-variant-numeric: normal;
}
.prose a.footnote {
  text-decoration: none;
  color: var(--accent);
  font-size: 0.75em;
  font-weight: 600;
  padding: 0 0.1em;
}
.prose a.footnote:hover { text-decoration: underline; }

/* Anchored jumps land below the viewport edge rather than flush to it. */
.prose li[role="doc-endnote"],
.prose h2, .prose h3 { scroll-margin-top: 1.5rem; }

.prose .footnotes {
  margin-top: 3.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--rule);
  font-size: 0.9375rem;
  line-height: 1.55;
  color: var(--ink-soft);
}
.prose .footnotes ol { padding-left: 1.35rem; }
.prose .footnotes li { margin-bottom: 0.7rem; }
.prose .footnotes li::marker { color: var(--ink-faint); }
.prose .footnotes p { margin: 0; }
.prose .footnotes a[role="doc-backlink"] {
  text-decoration: none;
  color: var(--ink-faint);
  padding-left: 0.2em;
}
.prose .footnotes a[role="doc-backlink"]:hover { color: var(--accent); }

/* A footnote you have jumped to is briefly marked, so you can find it. */
.prose .footnotes li:target {
  background: var(--mark);
  border-radius: 4px;
  padding: 0.35rem 0.6rem;
  margin-left: -0.6rem;
}

@media print {
  .toc { background: none; border: 1px solid #bbb; }
  .prose a.footnote { color: #000; }
}

/* --- footnote popover ------------------------------------------ */

/* Shown on hover/focus/tap by the script in the post layout. Without
   JavaScript it never appears and the markers behave as plain anchors. */
.fn-pop {
  position: absolute;
  z-index: 20;
  max-width: 30rem;
  width: max-content;
  padding: 0.85rem 1rem;
  background: var(--raised);
  border: 1px solid var(--rule);
  border-radius: 8px;
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.10), 0 1px 2px rgba(0, 0, 0, 0.06);
  font-size: 0.9375rem;
  line-height: 1.55;
  color: var(--ink);
}
.fn-pop p { margin: 0; }
.fn-pop a { color: var(--accent); }

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .fn-pop {
    box-shadow: 0 6px 24px rgba(0, 0, 0, 0.5), 0 1px 2px rgba(0, 0, 0, 0.4);
  }
}

/* The jump is the fallback, so make it land gently rather than teleport. */
@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

@media print { .fn-pop { display: none; } }

/* --- signature ------------------------------------------------- */

/* A personal mark, set like a pencil note beside the name rather than a
   second title. Faded to ~3.5:1 -- below body-text contrast on purpose,
   but above the 3:1 floor so it stays legible on a bright screen.
   aria-hidden: read aloud it is "dash k underscore k dash", which is noise
   after the name has already been announced. */
.sig {
  margin-left: 0.6rem;
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 400;
  font-variant-numeric: normal;
  letter-spacing: 0.08em;
  color: var(--ink-faint);
  opacity: 0.8;
  vertical-align: 0.22em;
  white-space: nowrap;
  user-select: none;
  transition: opacity 160ms ease, color 160ms ease;
}

/* Inks in when you visit the name it belongs to. */
.masthead h1:hover .sig { opacity: 1; color: var(--accent); }

@media (max-width: 34rem) {
  .sig { margin-left: 0.45rem; font-size: 0.6875rem; }
}

@media print { .sig { opacity: 1; color: #555; } }