/* ============================================================
   Variant 2 — earendil-inspired minimal mono.
   One pixel-flavoured monospace (Departure Mono, MIT), small
   type, hairline rules, generous whitespace, no panels.
   Light = pastel white; dark = dark blue. Follows OS setting.
   ============================================================ */

@font-face {
  font-family: 'Departure Mono';
  src: url('../fonts/DepartureMono-Regular.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

:root {
  --mono: 'Departure Mono', 'SFMono-Regular', ui-monospace, Menlo, monospace;
  --serif: 'Source Serif 4', 'Iowan Old Style', 'Palatino Linotype', Palatino, Georgia, serif;

  /* pastel white */
  --bg:        #f6f4ee;
  --ink:       #2e2c28;
  --ink-soft:  rgba(46, 44, 40, 0.58);
  --ink-faint: rgba(46, 44, 40, 0.35);
  --rule:      rgba(46, 44, 40, 0.16);
  --code-bg:   rgba(46, 44, 40, 0.06);
  --pre-bg:    #17202f;
  --pre-ink:   rgba(238, 240, 245, 0.92);
}

@media (prefers-color-scheme: dark) {
  :root {
    /* dark blue */
    --bg:        #0e1626;
    --ink:       rgba(232, 236, 244, 0.88);
    --ink-soft:  rgba(232, 236, 244, 0.55);
    --ink-faint: rgba(232, 236, 244, 0.32);
    --rule:      rgba(232, 236, 244, 0.14);
    --code-bg:   rgba(232, 236, 244, 0.08);
    --pre-bg:    #17202f;
    --pre-ink:   rgba(232, 236, 244, 0.9);
  }
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { font-size: 100%; }

body {
  font-family: var(--serif);
  font-size: 1.1875rem;
  line-height: 1.7;
  color: var(--ink);
  background: var(--bg);
  transition: background-color 0.4s ease, color 0.4s ease;
}

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

.wrap { max-width: 44rem; margin: 0 auto; padding: 0 1.5rem; }

a { color: var(--ink); text-underline-offset: 0.18em; }
a:hover { color: var(--ink-soft); }

/* ---------- header ---------- */

h1, h2, h3, h4, h5, h6 { font-family: var(--mono); }

.top-nav, .post-meta, .post-list time, .index-heading, .site-footer {
  font-family: var(--mono);
}

.site-header { padding: 1.5rem 0 0; }

.top-nav {
  display: flex; justify-content: space-between; align-items: baseline;
  flex-wrap: wrap; gap: 0.5rem 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--rule);
  font-size: 0.8125rem;
}

.brand { text-decoration: none; }

.nav-links a {
  color: var(--ink-soft);
  text-decoration: none;
  margin-left: 1.25rem;
}
.nav-links a:hover { color: var(--ink); text-decoration: underline; }

/* ---------- home ---------- */

/* Visually hidden but available to screen readers and crawlers */
/* Visually hidden but available to screen readers and crawlers */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.intro h1 {
  font-size: 1.375rem;
  font-weight: 400;
  letter-spacing: 0.01em;
}

.intro .lede {
  margin-top: 1rem;
  color: var(--ink-soft);
  max-width: 34em;
}

.post-list { list-style: none; padding: 0; margin-top: 1.5rem; }

.post-list li {
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--rule);
}

.post-list time {
  display: block;
  font-size: 0.8125rem;
  color: var(--ink-faint);
}

.post-list li > a {
  display: inline-block;
  margin-top: 0.25rem;
  font-family: var(--mono);
  text-decoration: none;
  font-size: 1.0625rem;
}
.post-list li > a:hover { text-decoration: underline; }

.post-list .excerpt {
  margin-top: 0.4rem;
  font-size: 1.0rem;
  color: var(--ink-soft);
}

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

.post-header { padding: 2.5rem 0 2rem; }

.post-header h1 {
  font-size: 1.625rem;
  font-weight: 400;
  line-height: 1.35;
}

.post-meta {
  margin-top: 0.9rem;
  font-size: 0.8125rem;
  color: var(--ink-faint);
}

.prose { font-size: 1.0rem; }

.prose p { margin: 1.25em 0; }

.prose h2, .prose h3, .prose h4 {
  font-weight: 400;
  line-height: 1.4;
  margin: 2.2em 0 0.8em;
}
.prose h2 { font-size: 1.25rem; }
.prose h3 { font-size: 1.0625rem; }
.prose h4 { font-size: 1rem; }

.prose ul, .prose ol { margin: 1.25em 0; padding-left: 1.5em; }
.prose li + li { margin-top: 0.35em; }
.prose li::marker { color: var(--ink-faint); }

.prose a { text-decoration: underline; }

.prose strong { font-weight: 400; background: var(--code-bg); padding: 0 0.2em; }

code, pre, kbd { font-family: var(--mono); }

.prose code {
  font-size: 0.82em;
  background: var(--code-bg);
  padding: 0.1em 0.35em;
  border-radius: 2px;
}

.prose pre {
  margin: 1.5em 0;
  background: var(--pre-bg);
  color: var(--pre-ink);
  padding: 1.1rem 1.25rem;
  overflow-x: auto;
  border-radius: 3px;
  font-size: 0.875rem;
  line-height: 1.6;
}
.prose pre code { background: none; padding: 0; }

.prose blockquote {
  margin: 1.5em 0;
  padding-left: 1.25em;
  border-left: 2px solid var(--rule);
  color: var(--ink-soft);
}

/* GitHub-style admonitions.
   Usage in a post (kramdown IAL on a blockquote):
     > **Warning** — something risky.
     {: .warning }
   Classes: .note (blue), .warning (yellow). */
.prose blockquote.note, .prose blockquote.warning {
  padding: 0.9rem 1.1rem;
  border-left-width: 4px;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 0.9rem;
}
.prose blockquote.note p, .prose blockquote.warning p { margin: 0.4em 0; }

.prose blockquote.note {
  border-left-color: #4c8dff;
  background: rgba(76, 141, 255, 0.10);
}
.prose blockquote.warning {
  border-left-color: #d4a017;
  background: rgba(212, 160, 23, 0.12);
}
.prose blockquote.note strong { background: none; padding: 0; color: #4c8dff; }
.prose blockquote.warning strong { background: none; padding: 0; color: #d4a017; }
@media (prefers-color-scheme: dark) {
  .prose blockquote.note { background: rgba(76, 141, 255, 0.14); }
  .prose blockquote.warning { background: rgba(212, 160, 23, 0.15); }
  .prose blockquote.note strong { color: #82aaff; }
  .prose blockquote.warning strong { color: #e0b53e; }
}

.prose img {
  display: block;
  max-width: 100%;
  margin: 1.75em auto;
  border: 1px solid var(--rule);
}

@media (prefers-color-scheme: dark) {
  /* White-background diagrams get inverted so they don't glare on the
     dark blue page. Add class="no-invert" to an <img> to opt out. */
  .prose img:not(.no-invert) {
    filter: invert(0.93) hue-rotate(180deg) brightness(0.95);
    border-color: transparent;
  }
}

.prose hr {
  border: 0;
  border-top: 1px solid var(--rule);
  margin: 2.5em 0;
}

.prose table { border-collapse: collapse; width: 100%; margin: 1.5em 0; font-size: 0.9rem; }
.prose th, .prose td { border: 1px solid var(--rule); padding: 0.4rem 0.7rem; text-align: left; }

.post-footer {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--rule);
  font-size: 0.875rem;
}
.post-footer a { color: var(--ink-soft); text-decoration: none; }
.post-footer a:hover { color: var(--ink); text-decoration: underline; }

.comments { margin-top: 3rem; padding-top: 1.5rem; border-top: 1px solid var(--rule); }

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

.site-footer {
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 0.5rem 1.5rem;
  margin-top: 6rem;
  padding-top: 1.5rem; padding-bottom: 2.5rem;
  border-top: 1px solid var(--rule);
  font-size: 0.8125rem;
  color: var(--ink-faint);
}
.site-footer a { color: var(--ink-soft); }

@media (max-width: 40rem) {
  body { font-size: 0.875rem; }
  .post-header { padding-top: 2rem; }
}

/* ============================================================
   Rouge syntax theme — "night harbor".
   Colors sampled to sit naturally on the site's dark blue:
   soft periwinkle keywords, pale cyan strings, amber types.
   Same block is used in both modes (like earendil's dark pre).
   ============================================================ */

:root { --pre-bg: #17202f; }

.highlight .hll { background-color: #22304a; }
.highlight .c, .highlight .cm, .highlight .c1, .highlight .cs, .highlight .cp { color: #667199; font-style: italic; }
.highlight .k, .highlight .kc, .highlight .kd, .highlight .kn, .highlight .kp, .highlight .kr, .highlight .kv { color: #82aaff; }
.highlight .kt { color: #ffcb6b; }
.highlight .s, .highlight .sb, .highlight .sc, .highlight .sd, .highlight .s1, .highlight .s2, .highlight .se, .highlight .sh, .highlight .si, .highlight .sr, .highlight .ss, .highlight .sx, .highlight .dl { color: #9ecea2; }
.highlight .m, .highlight .mb, .highlight .mf, .highlight .mh, .highlight .mi, .highlight .mo, .highlight .mx { color: #f78c6c; }
.highlight .n, .highlight .na, .highlight .nb, .highlight .ni, .highlight .nl, .highlight .nn, .highlight .no, .highlight .nv, .highlight .vc, .highlight .vg, .highlight .vi, .highlight .vm, .highlight .nx, .highlight .py, .highlight .bp { color: #d6deeb; }
.highlight .nc, .highlight .ne, .highlight .nd { color: #ffcb6b; }
.highlight .nf, .highlight .fm { color: #82aaff; }
.highlight .nt { color: #f07178; }
.highlight .o, .highlight .ow, .highlight .p { color: #89ddff; }
.highlight .gh, .highlight .gu { color: #82aaff; font-weight: bold; }
.highlight .gd { color: #f07178; }
.highlight .gi { color: #9ecea2; }
.highlight .ge { font-style: italic; }
.highlight .gs { font-weight: bold; }
.highlight .err { color: #f07178; }
.highlight .w { color: #d6deeb; }

/* Light-mode code blocks: same palette family, inverted value.
   Background is a slightly deeper pastel than the page so the
   block reads as a panel, not a hole. */
@media (prefers-color-scheme: light) {
  :root { --pre-bg: #eae7de; --pre-ink: #2e2c28; }

  .highlight .hll { background-color: #ddd9cc; }
  .highlight .c, .highlight .cm, .highlight .c1, .highlight .cs, .highlight .cp { color: #8a8574; font-style: italic; }
  .highlight .k, .highlight .kc, .highlight .kd, .highlight .kn, .highlight .kp, .highlight .kr, .highlight .kv { color: #0451a5; }
  .highlight .kt { color: #9a5b00; }
  .highlight .s, .highlight .sb, .highlight .sc, .highlight .sd, .highlight .s1, .highlight .s2, .highlight .se, .highlight .sh, .highlight .si, .highlight .sr, .highlight .ss, .highlight .sx, .highlight .dl { color: #267035; }
  .highlight .m, .highlight .mb, .highlight .mf, .highlight .mh, .highlight .mi, .highlight .mo, .highlight .mx { color: #b4530a; }
  .highlight .n, .highlight .na, .highlight .nb, .highlight .ni, .highlight .nl, .highlight .nn, .highlight .no, .highlight .nv, .highlight .vc, .highlight .vg, .highlight .vi, .highlight .vm, .highlight .nx, .highlight .py, .highlight .bp { color: #2e2c28; }
  .highlight .nc, .highlight .ne, .highlight .nd { color: #9a5b00; }
  .highlight .nf, .highlight .fm { color: #0451a5; }
  .highlight .nt { color: #a31515; }
  .highlight .o, .highlight .ow, .highlight .p { color: #586069; }
  .highlight .gh, .highlight .gu { color: #0451a5; font-weight: bold; }
  .highlight .gd { color: #a31515; }
  .highlight .gi { color: #267035; }
  .highlight .err { color: #a31515; }
  .highlight .w { color: #2e2c28; }
}