/* ------------------------------------------------------------------
   Dark typographic theme — "chalk on slate".

   Adapted from the stylesheet of Erich Grunewald's blog
   (https://github.com/erwald/blog, MIT), with an inverted palette, a
   muted cyan accent and assorted additions. See LICENSE.

   Fonts are declared in fonts.css.
   ------------------------------------------------------------------ */

/* --- tokens ------------------------------------------------------ */
:root {
  color-scheme: dark;

  /* Cool near-blacks rather than pure #000: pure black + a serif at
       high contrast causes halation (glowing/smeared strokes). Each of
       these carries a little cyan so the neutrals agree with the accent
       instead of fighting it. */
  --bg: #0b1012;
  --surface: #151d20; /* cards, code blocks, link highlights */
  --surface-hi: #243236; /* hover, rules, borders */

  /* Cool off-white, deliberately NOT #fff — holding it back keeps
       contrast comfortable (still 15:1 on --bg, way past WCAG AAA). */
  --fg: #dbe6e6;
  --fg-muted: #93a3a4; /* 7.3:1 on --bg  */
  --fg-dim: #7f9092; /* 5.8:1 on --bg, 5.1:1 on --surface — the
                          faintest thing here still clears WCAG AA */

  --accent: #a1cac8; /* muted pastel cyan, ~28% sat */
  --accent-dim: #85b1af;

  --title-font: "Junicode", Georgia, serif;
  --body-font: "Junicode", Georgia, serif;
  --mono-font: "Iosevka Fixed", ui-monospace, SFMono-Regular, monospace;

  --measure: 660px;
}

/* --- base -------------------------------------------------------- */
html {
  font-family: var(--body-font);
  font-size: 20px; /* the whole scale hangs off this */
  color: var(--fg);
  background: var(--bg);
  scrollbar-color: var(--surface-hi) var(--bg);
}
/* NB: no `-webkit-font-smoothing: antialiased` on purpose — on dark
   backgrounds it thins the strokes and a serif this delicate gets frail. */

body {
  margin: 0;
  padding: 20px 0;
}

header,
main,
footer {
  margin: 0 auto;
  padding: 0 20px;
  max-width: var(--measure);
}
footer {
  margin-top: 20px;
  max-width: 480px;
  color: var(--fg-muted);
}
footer p {
  font-size: 17px;
  text-align: center;
}

::selection {
  background: var(--accent);
  color: var(--bg);
}

/* Links are highlight blocks. Inverted, the hover state becomes a solid
   cyan chip — much more emphatic than the light-theme grey. */
a {
  color: var(--fg);
  background-color: var(--surface);
  text-decoration-color: var(--accent-dim);
  text-underline-offset: 2px;
}
a:hover {
  color: var(--bg);
  background-color: var(--accent);
}
a:visited {
  color: var(--fg-muted);
}
a:focus-visible,
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

b,
strong {
  font-weight: 700;
  color: #eef5f5; /* bold needs a nudge brighter to read as bold on dark */
}

hr {
  border: none;
  border-top: 2px solid var(--surface-hi);
}

/* --- nav --------------------------------------------------------- */
#top-menu {
  display: flex;
  align-items: center;
  margin-bottom: 1ch;
}
#logo {
  display: inline-flex;
  color: var(--fg);
  background: transparent;
  line-height: 0;
}
#logo:hover {
  color: var(--accent);
  background: transparent;
}

#breadcrumbs {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  margin: 0;
  padding: 0;
  font-weight: 600;
  font-size: 23px;
  text-transform: uppercase;
  letter-spacing: 0.02em; /* uppercase needs air, more so on dark */
}
#breadcrumbs li {
  display: inline-block;
  line-height: 1.5ch;
  margin-left: 1.5ch;
}
#breadcrumbs a,
#breadcrumbs a:visited {
  color: var(--fg);
  background: transparent;
  text-decoration: none;
}
#breadcrumbs a:hover {
  background: var(--accent);
  color: var(--bg);
}
/* current page is italic + cyan */
#breadcrumbs [aria-current]:not([aria-current="false"]) {
  font-style: italic;
  color: var(--accent);
}

/* --- typography -------------------------------------------------- */
h1 {
  font-family: var(--title-font);
  font-size: 36px;
  font-weight: 700;
  line-height: 2ch;
  margin: 0;
  color: #f0f7f7;
}
h2 {
  font-family: var(--title-font);
  font-size: 28px;
  font-weight: 400;
  color: var(--accent);
}
h3 {
  font-family: var(--title-font);
  font-size: 22px;
  font-weight: 400;
  font-style: italic;
  color: var(--accent-dim);
  padding-top: 0.5ch;
}

/* `ch`-based rhythm is the trick that makes it feel typeset */
p,
li,
label {
  line-height: 2.8ch;
  hyphens: auto;
}

#date {
  padding-top: 1ch;
  color: var(--fg-muted);
}
.nowrap {
  white-space: nowrap;
}

blockquote {
  margin-left: 0;
  padding-left: 20px;
  border-left: 2px solid var(--surface-hi);
  color: var(--fg-muted);
}
blockquote p,
blockquote ul,
blockquote li {
  font-size: 18px;
  line-height: 2.8ch;
}

sup {
  line-height: 0;
}

/* --- images ------------------------------------------------------ */
#content img {
  width: 100%;
}

/* 1-bit dithered art is black-on-white; invert it and it becomes
   white-on-black, which sits on a dark page perfectly. Either add this
   class in your markdown, or bake the inversion into the convert script
   (see dither.sh) and drop the filter. */
.dither {
  filter: invert(1);
}

/* Photographs shouldn't sit at full brightness against a dark page. */
.photo {
  filter: brightness(0.88) contrast(1.03);
}

figure {
  margin: 20px 0;
}
figcaption {
  font-size: 17px;
  font-style: italic;
  color: var(--fg-muted);
  padding-top: 0.5ch;
}

/* --- post list --------------------------------------------------- */
.post-abbrev-body {
  margin-bottom: 20px;
  padding: 1ch;
  background-color: var(--surface);
  border-left: 2px solid transparent;
  transition:
    border-color 0.12s ease,
    background-color 0.12s ease;
}
.post-abbrev-body:hover {
  border-left-color: var(--accent);
  background-color: #1a2427;
}
.post-abbrev-date {
  padding-bottom: 0.5ch;
  color: var(--fg-muted);
}
.post-abbrev-link {
  font-size: 26px;
  padding-bottom: 0.5ch;
}
/* inside a card the link highlight is redundant — strip it back */
.post-abbrev-link a {
  background: transparent;
  color: var(--fg);
  text-decoration: none;
}
.post-abbrev-link a:hover {
  background: transparent;
  color: var(--accent);
}
.post-abbrev-read-time {
  font-style: italic;
  color: var(--fg-dim);
}

/* two-up featured grid */
.post-abbrev-featured-container {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 20px;
}
.post-abbrev-featured-body {
  width: calc(50% - 10px);
  box-sizing: border-box;
  margin: 0;
  padding: 10px;
  background-color: var(--surface);
}
.post-abbrev-featured-img {
  padding-top: 68%;
  position: relative;
  overflow: hidden;
  margin-bottom: 1ch;
}
.post-abbrev-featured-img a {
  background: transparent;
}
.post-abbrev-featured-img img {
  position: absolute;
  object-fit: cover;
  height: auto;
  width: 100%;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

/* --- pagination -------------------------------------------------- */
.pagination {
  display: flex;
  flex-wrap: wrap;
  gap: 1ch;
  align-items: baseline;
  margin-top: 2ch;
}
.pagination-current {
  color: var(--accent);
  font-style: italic;
}

/* --- code -------------------------------------------------------- */
code {
  font-family: var(--mono-font);
  font-size: 16px;
  padding: 2px;
  margin: -2px;
  hyphens: none;
}
:not(a) > code {
  color: var(--accent-dim);
  background-color: var(--surface);
}

/* full-bleed out of the text column, with a cyan spine */
pre {
  padding: 10px 20px;
  margin: 20px -20px;
  background-color: var(--surface);
  border-left: 2px solid var(--accent-dim);
  color: var(--fg);
  overflow-x: auto;
  overflow-y: clip;
  white-space: pre-wrap;
  word-wrap: break-word;
}
pre code {
  color: var(--fg);
  background: transparent;
}

/* Prism token classes (eleventy-plugin-syntaxhighlight) */
.token.keyword,
.token.tag,
.token.selector {
  color: var(--accent);
  font-weight: 800;
}
.token.string,
.token.attr-value {
  color: #aecdc0;
}
.token.function,
.token.class-name {
  color: #bcd7ea;
}
.token.number,
.token.boolean {
  color: #d8b4c8;
}
.token.punctuation,
.token.operator {
  color: var(--fg-muted);
  font-weight: 400;
}
.token.comment {
  color: var(--fg-dim);
  font-style: italic;
}

/* the armoured GPG block: never wrap, it's meant to be copied whole */
.key-block {
  white-space: pre;
  overflow-x: auto;
  word-wrap: normal;
}
.key-block code {
  font-size: 13px;
  line-height: 1.5;
}

table {
  border-collapse: collapse;
  width: 100%;
}
th,
td {
  padding: 0.3ch 1ch 0.3ch 0;
  border-bottom: 1px solid var(--surface-hi);
  text-align: left;
  vertical-align: top;
}
th {
  color: var(--accent-dim);
  font-weight: 600;
}
.key-details th {
  width: 9em;
  white-space: nowrap;
}
.key-details code {
  word-break: break-all;
}

/* --- callout box ------------------------------------------------- */
.edit {
  font-size: 18px;
  color: var(--fg);
  background: var(--surface);
  padding: 0 20px;
  margin: 20px -20px;
  border: none;
  border-left: 2px solid var(--accent);
}

/* --- misc bits --------------------------------------------------- */
.bottom-nav {
  display: flex;
  justify-content: space-between;
  margin-top: 2ch;
}

.empty-state {
  padding: 1ch 20px;
  background: var(--surface);
  border-left: 2px solid var(--surface-hi);
  color: var(--fg-muted);
}
.empty-state p:first-child {
  color: var(--fg);
}

.link-list {
  list-style: none;
  padding-left: 0;
}
.link-list li {
  padding-bottom: 0.5ch;
}

#series {
  font-size: 18px;
  font-style: italic;
  color: var(--fg-muted);
}
#series p {
  margin: 0;
}
#series ul {
  list-style-type: none;
  padding-left: 1.5ch;
}
#series .series-unpublished {
  color: var(--fg-dim);
}

#subscribe-form {
  background: var(--surface);
  padding: 0 1ch;
  margin: 2ch 0;
  font-size: 18px;
}

.footnotes-sep {
  margin: 2ch 0;
}
.footnotes-list {
  font-size: 18px;
  color: var(--fg-muted);
}
.direct-link {
  background: transparent;
  color: var(--fg-dim);
  text-decoration: none;
  opacity: 0;
  transition: opacity 0.12s ease;
}
h1:hover .direct-link,
h2:hover .direct-link,
h3:hover .direct-link {
  opacity: 1;
}

input,
textarea {
  font-family: var(--body-font);
  font-size: 17px;
  color: var(--fg);
  background: var(--bg);
  border: 1px solid var(--surface-hi);
  padding: 0.4ch 0.6ch;
}
input:focus,
textarea:focus {
  border-color: var(--accent);
}

/* --- responsive -------------------------------------------------- */
@media only screen and (max-width: 800px) {
  pre code {
    font-size: 14px;
  }
}
@media only screen and (max-width: 700px) {
  pre code {
    font-size: 12px;
  }
}
@media only screen and (max-width: 640px) {
  h1 {
    line-height: 1.5ch;
  }
  #content {
    width: 100%;
    padding: 0;
  }
  .post-abbrev-featured-body {
    width: 100%;
  }
  .bottom-nav {
    font-size: 17px;
  }
  .edit,
  pre {
    margin: 20px 0;
  }
  pre {
    white-space: pre;
    word-wrap: normal;
  }
  .key-details th {
    width: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
  }
}