/* Blog posts (pandoc/blog_template.html). Colors, type and the night/day
   toggle come from theme.css. UIkit's stylesheet loads first (some posts
   use its accordions), so a few rules here undo its defaults. Code blocks
   use Vim's classic "blue" colors in both night and day. */

:root {
  --bar-h: 52px;
  --toc-w: 240px;
  --measure: 70ch;

  /* code: Vim "blue" highlight groups */
  --code-bg: #00005f;
  --code-fg: #ffd700; /* Normal */
  --code-comment: #878787; /* Comment */
  --code-string: #5fffff; /* String, Constant */
  --code-keyword: #ffffff; /* Statement */
  --code-type: #ffa500; /* Type */
  --code-special: #d787d7; /* Special */
  --code-preproc: #00ff00; /* PreProc */
  --code-ident: #bcbcbc; /* Identifier, Function */
}

html {
  scroll-padding-top: calc(var(--bar-h) + 16px);
}
body {
  font-size: 18px;
  line-height: 1.7;
}

/* ---------- top bar ---------- */

.post-bar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 12px;
  height: var(--bar-h);
  padding: 0 24px;
  background: var(--bg-glass);
  border-bottom: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 0.85rem;
}
.bar-home {
  color: var(--text) !important;
  text-decoration: none !important;
  white-space: nowrap;
}
.bar-name {
  color: var(--heading);
  font-weight: 700;
}
.bar-back {
  margin-left: 10px;
  color: var(--muted);
}
.bar-home:hover .bar-back {
  color: var(--accent);
}
.bar-fill {
  flex: 1;
}
.toc-toggle {
  display: none; /* the contents are a sidebar on wide screens */
  padding: 2px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.82rem;
  cursor: pointer;
}
.toc-toggle:hover,
.toc-toggle[aria-expanded='true'] {
  border-color: var(--accent);
  color: var(--text);
}

/* ---------- layout ---------- */

.post-layout {
  display: grid;
  grid-template-columns: var(--toc-w) minmax(0, 1fr);
  gap: 56px;
  max-width: 1160px;
  margin: 0 auto;
  padding: 40px 28px 80px;
}
.no-toc .post-layout {
  grid-template-columns: minmax(0, 1fr);
}

.post {
  min-width: 0;
  max-width: var(--measure);
}
.no-toc .post {
  margin: 0 auto;
}

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

.toc {
  position: sticky;
  top: calc(var(--bar-h) + 24px);
  align-self: start;
  max-height: calc(100vh - var(--bar-h) - 48px);
  overflow-y: auto;
  font-family: var(--mono);
  font-size: 0.8rem;
  line-height: 1.45;
}
.toc[hidden] {
  display: none;
}
.toc-title {
  margin: 0 0 10px;
  color: var(--heading);
  font-weight: 700;
}
.toc ul {
  margin: 0;
  padding: 0;
  list-style: none;
}
.toc ul ul {
  padding-left: 12px;
  border-left: 1px solid var(--line);
}
.toc li {
  margin: 0;
}
.toc a {
  display: block;
  padding: 3px 0 3px 8px;
  border-left: 2px solid transparent;
  color: var(--muted);
}
.toc a:hover {
  color: var(--text);
  text-decoration: none;
}
.toc a[aria-current='true'] {
  border-left-color: var(--heading);
  color: var(--heading);
}
/* code in headings, e.g. floor(): plain text here (UIkit styles it pink) */
.toc code {
  padding: 0;
  background: none;
  color: inherit;
  font: inherit;
}

/* ---------- heading ---------- */

.post-cover {
  display: block;
  width: 100%;
  max-height: 440px;
  margin: 0 0 28px;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--img-bg);
}
.post-cover[hidden] {
  display: none;
}
.post-meta {
  margin: 0 0 8px;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.82rem;
}
h1.post-title {
  margin: 0 0 10px;
  color: var(--text);
  font-family: var(--sans);
  font-weight: 600;
  font-size: 2.2rem;
  line-height: 1.2;
}
.post-tags {
  margin: 0 0 32px;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.82rem;
}
.post-tags:empty {
  display: none;
}
.post-head {
  padding-bottom: 8px;
  margin-bottom: 32px;
  border-bottom: 1px solid var(--line);
}

/* ---------- article body ---------- */

.post-body {
  color: var(--text);
  font-size: 1rem;
}
.post-body > :first-child {
  margin-top: 0;
}
.post-body p,
.post-body ul,
.post-body ol,
.post-body dl,
.post-body table,
.post-body blockquote,
.post-body figure,
.post-body pre {
  margin: 0 0 1.2em;
}
.post-body li {
  margin: 0.25em 0;
}
.post-body li > p {
  margin: 0;
}

.post-body h1,
.post-body h2,
.post-body h3,
.post-body h4,
.post-body h5,
.post-body h6 {
  margin: 2em 0 0.6em;
  color: var(--heading);
  font-family: var(--mono);
  font-weight: 600;
  line-height: 1.3;
}
.post-body h1 {
  font-size: 1.5rem;
}
.post-body h2 {
  font-size: 1.25rem;
}
.post-body h3 {
  font-size: 1.08rem;
}
.post-body h4,
.post-body h5,
.post-body h6 {
  color: var(--text);
  font-size: 1rem;
}

.post-body a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}
.post-body strong {
  color: var(--text);
  font-weight: 600;
}
.post-body em {
  color: inherit; /* UIkit colors <em> pink */
}

.post-body img,
.post-body video,
.post-body iframe {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 1.4em auto 0.6em;
  border-radius: 6px;
}
.post-body iframe {
  width: 100%;
  aspect-ratio: 16 / 9;
  border: 0;
}
.post-body figure {
  text-align: center;
}
.post-body .caption,
.post-body figcaption {
  display: block;
  margin: 0 0 1.6em;
  color: var(--muted);
  font-size: 0.85rem;
  text-align: center;
}

.post-body blockquote {
  padding: 2px 0 2px 18px;
  border-left: 3px solid var(--heading);
  color: var(--muted);
  font-size: 1rem;
  font-style: normal;
}

.post-body hr {
  height: 1px;
  margin: 2.4em 0;
  border: none;
  background: var(--line);
}

.post-body table {
  display: block;
  max-width: 100%;
  overflow-x: auto;
  border-collapse: collapse;
  font-size: 0.92rem;
}
.post-body th,
.post-body td {
  padding: 6px 12px;
  border: 1px solid var(--line);
  color: var(--text);
  text-align: left;
}
.post-body th {
  background: var(--panel);
  font-family: var(--mono);
  font-weight: 600;
}

/* footnotes */
.post-body .footnotes,
.post-body #footnotes {
  color: var(--muted);
  font-size: 0.85rem;
}

/* ---------- code ---------- */

.post-body code {
  padding: 0.1em 0.35em;
  border-radius: 4px;
  background: var(--panel);
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.88em;
  white-space: break-spaces;
}
:root[data-theme='day'] .post-body code {
  background: #eceaf7;
  color: #000087;
}

.post-body pre {
  position: relative;
  padding: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--code-bg);
}
.post-body pre code,
:root[data-theme='day'] .post-body pre code,
.post-body pre code.hljs {
  display: block;
  padding: 16px 18px;
  overflow-x: auto;
  border-radius: 0;
  background: var(--code-bg);
  color: var(--code-fg);
  font-size: 0.85rem;
  line-height: 1.6;
  white-space: pre;
}
.post-body div.sourceCode {
  margin: 0 0 1.2em;
  background: none;
}
/* pandoc's line anchors */
.post-body pre code a {
  text-decoration: none;
}

.hljs-comment,
.hljs-quote {
  color: var(--code-comment);
  font-style: italic;
}
.hljs-keyword,
.hljs-selector-tag,
.hljs-literal,
.hljs-section,
.hljs-name {
  color: var(--code-keyword);
  font-weight: 600;
}
.hljs-string,
.hljs-number,
.hljs-regexp,
.hljs-symbol,
.hljs-bullet,
.hljs-link,
.hljs-addition {
  color: var(--code-string);
}
.hljs-type,
.hljs-class .hljs-title,
.hljs-built_in,
.hljs-builtin-name {
  color: var(--code-type);
}
.hljs-meta,
.hljs-meta-keyword {
  color: var(--code-preproc);
}
.hljs-attr,
.hljs-attribute,
.hljs-variable,
.hljs-template-variable,
.hljs-params,
.hljs-title,
.hljs-function {
  color: var(--code-ident);
}
.hljs-tag,
.hljs-selector-id,
.hljs-selector-class,
.hljs-subst,
.hljs-deletion {
  color: var(--code-special);
}
.hljs-emphasis {
  font-style: italic;
}
.hljs-strong {
  font-weight: 700;
}

/* copy button (js/highlightjs-badge.js injects its own styles after these,
   hence the extra specificity) */
.post-body .code-badge-pre .code-badge {
  border-radius: 0 7px 0 7px;
  background: rgba(0, 0, 0, 0.35);
  color: #fff;
  font-family: var(--mono);
  font-size: 0.75rem;
}
.post-body .code-badge .code-badge-language {
  color: var(--code-fg);
}
.post-body .code-badge .code-badge-copy-icon {
  font-size: 1em;
}

/* ---------- things inside particular posts ---------- */

/* UIkit accordions (Daisy Seed, More About This Blog) */
.post-body .uk-accordion > li {
  margin: 0 0 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
}
.post-body .uk-accordion-title {
  display: block;
  padding: 10px 16px;
  color: var(--heading);
  font-family: var(--mono);
  font-size: 1rem;
  text-decoration: none;
}
/* UIkit's +/- icon is dark; lighten it at night */
:root[data-theme='night'] .post-body .uk-accordion-title::before {
  filter: invert(1);
}
.post-body .uk-accordion-content {
  margin: 0;
  padding: 0 16px 12px;
}

/* RNBO patches (Daisy Seed) */
.post-body #rnbo-root {
  max-width: 420px;
  margin: 1.4em auto;
  padding: 20px 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  font-family: var(--mono);
  font-size: 0.85rem;
}
.post-body .ezdac-button {
  width: 60px;
  height: 60px;
  margin-bottom: 16px;
  border: none;
  background: transparent url('../resources/ezdac_off.svg') no-repeat center / contain;
  cursor: pointer;
}
.post-body .param-label {
  display: block;
  padding-top: 10px;
  color: var(--text);
  font-weight: 600;
}
.post-body #rnbo-root input {
  width: 100%;
  accent-color: var(--heading);
}
.post-body #rnbo-root input[type='text'],
.post-body #rnbo-root input:not([type]) {
  margin-top: 4px;
  padding: 2px 6px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--bg);
  color: var(--text);
  font: inherit;
}

/* KnowledgeBase guides (KnowledgeBase/web.lua turns the PDF-only parts
   of the markdown into these) */

/* text that flows into two columns, like the PDF */
.post-body .columns {
  columns: 2 240px;
  column-gap: 32px;
  margin: 0 0 1.2em;
}
.post-body .columns > * {
  break-inside: avoid;
}
.post-body .columns img {
  margin-top: 0;
}
/* the PDF ends image lines with "\" (a line break); the web doesn't need it */
.post-body img + br {
  display: none;
}
.post-body p:has(> img:only-child),
.post-body p:has(> img + br:last-child) {
  margin-bottom: 0.4em;
}
/* several images in one paragraph sit side by side, one per column (in the
   PDF, LaTeX splits them across the columns; e.g. the two color palettes) */
.post-body p:has(> img ~ img) {
  display: grid;
  grid-auto-columns: minmax(0, 1fr);
  grid-auto-flow: column;
  align-items: center;
  justify-items: center;
  gap: 16px;
  column-span: all;
}
.post-body p:has(> img ~ img) img {
  max-width: 100%;
  margin: 0;
}

/* note and tip boxes */
.post-body .info,
.post-body .box,
.post-body .warning,
.post-body .error {
  margin: 0 0 1.4em;
  padding: 14px 18px 2px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: 6px;
  background: var(--panel);
}
.post-body .box {
  border-left-color: var(--heading);
}
.post-body .warning,
.post-body .error {
  border-left-color: #ff004d;
}
.post-body .info > p:first-child,
.post-body .box > p:first-child {
  font-family: var(--mono);
  font-size: 0.85rem;
}

/* \commandline: a line typed at the PICO-8 prompt */
.post-body .cmdline {
  margin: 0 0 1.2em;
  padding: 8px 14px;
  border-radius: 4px;
  background: #000;
  color: #fff;
  font-family: var(--mono);
  font-size: 0.9rem;
  white-space: pre-wrap;
}
.post-body .info .cmdline,
.post-body .blank .cmdline {
  margin-bottom: 0.6em;
}
.post-body .cmdline .tc-gray {
  color: #9a9a9a;
}
.post-body .cmdline .tc-pico-cyan {
  color: #29adff;
}
.post-body .cmdline .tc-pico-magenta {
  color: #ff77a8;
}

/* colors from the PDF, mapped to the site's palette */
.post-body .tc-accent {
  color: var(--accent);
}
.post-body .tc-muted {
  color: var(--muted);
}
.post-body .tc-pico-pink {
  color: #ff77a8;
}
.post-body .tc-pico-red {
  color: #ff004d;
}
:root[data-theme='day'] .post-body .tc-pico-pink {
  color: #d6336c;
}
:root[data-theme='day'] .post-body .tc-pico-red {
  color: #d1003f;
}

/* download button in the heading */
.post-download {
  display: inline-block;
  margin: 0 0 28px;
  padding: 6px 14px;
  border-radius: 6px;
  background: var(--highlight);
  color: var(--on-highlight) !important;
  font-family: var(--mono);
  font-weight: 700;
  font-size: 0.88rem;
  text-decoration: none !important;
}
.post-download:hover {
  filter: brightness(1.08);
}
.post-download small {
  font-weight: 400;
  opacity: 0.75;
}

/* "in progress" note at the end of unfinished notes (status in the JSON) */
.post-status {
  margin: 48px 0 0;
  padding: 14px 18px;
  border: 1px dashed var(--heading);
  border-radius: 8px;
  color: var(--muted);
}
.post-status p {
  margin: 0;
}
.post-status-label {
  margin-bottom: 4px !important;
  color: var(--heading);
  font-family: var(--mono);
  font-weight: 700;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.post-status-label::before {
  content: '▍';
  animation: post-status-blink 1.1s steps(1) infinite;
}
@keyframes post-status-blink {
  50% {
    opacity: 0;
  }
}
@media (prefers-reduced-motion: reduce) {
  .post-status-label::before {
    animation: none;
  }
}

/* math (KaTeX) */
.post-body .katex-display {
  margin: 1.2em 0;
  overflow-x: auto;
  overflow-y: hidden;
}
.post-body .katex {
  color: var(--text);
  font-size: 1.08em;
}

/* ---------- previous / next ---------- */

.post-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 56px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}
.post-nav a {
  display: block;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  color: var(--text);
  text-decoration: none !important;
}
.post-nav a:hover {
  border-color: var(--heading);
}
.post-nav-next {
  text-align: right;
}
.post-nav-label {
  display: block;
  margin-bottom: 4px;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.78rem;
}
.post-nav-title {
  font-weight: 600;
  line-height: 1.35;
}
.post-nav .post-nav-all {
  grid-column: 1 / -1;
  padding: 0;
  border: none;
  background: none;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.85rem;
  text-align: center;
}

/* ---------- small screens ---------- */

@media (max-width: 960px) {
  .post-layout {
    display: block;
    padding: 24px 18px 64px;
  }
  .post {
    margin: 0 auto;
  }
  .toc-toggle {
    display: inline-block;
  }
  .toc-toggle[hidden] {
    display: none;
  }
  /* contents drop down under the top bar */
  .toc {
    position: fixed;
    top: var(--bar-h);
    right: 0;
    left: 0;
    z-index: 9;
    display: none;
    max-height: 70vh;
    padding: 16px 20px 20px;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.25);
    font-size: 0.9rem;
  }
  .toc-open .toc {
    display: block;
  }
  h1.post-title {
    font-size: 1.7rem;
  }
}

@media (max-width: 560px) {
  .post-bar {
    padding: 0 14px;
  }
  .bar-back {
    display: none;
  }
  .post-nav {
    grid-template-columns: 1fr;
  }
  .post-nav-next {
    text-align: left;
  }
}