/* ==========================================================================
   Rohit's Blog — style adapted from Cassidy Williams' "blahg"
   (https://github.com/cassidoo/blahg), itself based on Bear Blog's default CSS
   (MIT). Monospace, minimal, sticky centred nav, randomised link underlines.
   All the site's feature hooks (TOC, alerts, line numbers, etc.) are preserved.
   ========================================================================== */

:root {
  --font-mono: "iA Writer Mono", ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  /* Warm system serif for prose (Iowan Old Style on Apple, Palatino/Georgia elsewhere). */
  --font-serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, "Times New Roman", serif;
  --measure: 70ch;

  /* blahg palette */
  --white: #efefef;
  --black: #252525;
  --gray: #6b6b6b;
  --highlight: #e5ffc3;
  --green: #24d05a;
  --pink: #eb4888;
  --blue: #10a2f5;
  --yellow: #e9bc3f;

  /* semantic (light) */
  --bg: var(--white);
  --fg: var(--black);
  --fg-muted: var(--gray);
  --accent: var(--blue);
  --border: #cfcfcf;
  --nav-bg: rgba(239, 239, 239, 0.7);
  --code-bg: rgba(37, 37, 37, 0.06);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: var(--black);
    --fg: var(--white);
    --fg-muted: #a4a4a4;
    --border: #444444;
    --nav-bg: rgba(37, 37, 37, 0.7);
    --code-bg: rgba(239, 239, 239, 0.10);
  }
}

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

html, body {
  margin: auto;
  max-width: var(--measure);
  padding: 20px;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-serif);
  font-size: 1.05rem;
  line-height: 1.65;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

::selection { background: var(--highlight); color: var(--black); }
@media (prefers-color-scheme: dark) {
  ::selection { background: #0f0f0f; color: var(--white); }
}

/* Links: text is the body colour; the underline colour is randomised by
   colors.js (default underline = text colour when JS is off). */
a {
  color: var(--fg);
  text-decoration-thickness: 0.3ex;
  text-underline-offset: 0.3ex;
}
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.skip-link { position: absolute; left: -9999px; }
.skip-link:focus {
  left: 20px; top: 8px; z-index: 10;
  background: var(--bg); padding: 0.4rem 0.6rem; border: 1px solid var(--border);
}

/* --- Header + sticky nav ---------------------------------------------- */
.site-header { text-align: center; margin-bottom: 0; }
.site-title {
  display: inline-block;
  font-size: 1.9rem;
  font-weight: 700;
  text-decoration: none;
  margin: 0.3em 0 0.1em;
}
.site-subtitle { color: var(--fg-muted); margin: 0 0 0.5em; }

.site-nav {
  position: sticky;
  top: 0;
  z-index: 5;
  text-align: center;
  padding: 20px 0;
  margin-bottom: 24px;
  background: var(--nav-bg);
  -webkit-backdrop-filter: blur(2px);
  backdrop-filter: blur(2px);
}
.site-nav a { text-decoration: none; }
.site-nav a:not(:last-child) { padding-right: 12px; }
.site-nav a.active { font-weight: 700; text-decoration: underline; }
@media (max-width: 600px) {
  .site-nav a:not(:last-child) { padding-right: 8px; }
}

main { line-height: 1.6; }

/* --- Headings --------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 { line-height: 1.15; position: relative; }
h1 { color: var(--fg); font-weight: 700; font-size: 1.8rem; margin: 0.6em 0 0.3em; }
h2, h3, h4, h5, h6 { color: var(--fg-muted); font-weight: 400; }
h2 { font-size: 1.4rem; margin: 1.8em 0 0.4em; }
h3 { font-size: 1.15rem; margin: 1.5em 0 0.4em; }
h4 { font-size: 1rem; margin: 1.3em 0 0.3em; }

/* Anchor sits in the left gutter, out of flow, so heading text aligns with body. */
.zola-anchor {
  position: absolute;
  left: 0;
  transform: translateX(-100%);
  padding-right: 0.3em;
  font-size: 0.85em;
  opacity: 0;
  text-decoration: none;
}
h1:hover .zola-anchor, h2:hover .zola-anchor, h3:hover .zola-anchor,
h4:hover .zola-anchor, h5:hover .zola-anchor, h6:hover .zola-anchor { opacity: 0.4; }

p, ul, ol, blockquote, table, figure, pre, dl { margin: 0 0 1rem; }
ul, ol { padding-left: 1.3rem; }
li { margin: 0.2rem 0; }
img { max-width: 100%; height: auto; }
hr { border: none; border-top: 1px solid var(--gray); margin: 1.5rem 0; }

blockquote {
  /* Bar hangs in the left gutter; quote text lines up with body text. */
  margin: 0 0 1rem -1rem;
  padding-left: calc(1rem - 3px);
  border-left: 3px solid var(--gray);
  font-style: italic;
  color: var(--fg);
}
blockquote > :first-child { margin-top: 0; }
blockquote > :last-child { margin-bottom: 0; }

table { width: 100%; border-collapse: collapse; }
th, td { padding: 0.4rem 0.6rem; border-bottom: 1px solid var(--border); text-align: left; }
th { font-weight: 700; }

/* --- Code ------------------------------------------------------------- */
:not(pre) > code {
  font-family: var(--font-mono);
  background: var(--code-bg);
  padding: 2px 5px;
  font-size: 0.86em;
  font-weight: 700;
}
pre {
  font-family: var(--font-mono);
  padding: 1rem;
  overflow-x: auto;
  border: 1px solid var(--border);
  font-size: 0.88rem;
  line-height: 1.5;
  -webkit-overflow-scrolling: touch;
}
pre code { font-family: var(--font-mono); background: none; padding: 0; font-weight: 400; }

/* Line numbers (```lang,linenos): right-aligned, non-selectable gutter. */
.giallo-ln {
  display: inline-block;
  min-width: 2.2em;
  margin-right: 1rem;
  text-align: right;
  user-select: none;
  opacity: 0.5;
}
/* Highlighted lines (```lang,hl_lines=…): full-width row + left marker. */
.z-hl { display: inline-block; width: 100%; box-shadow: inset 3px 0 0 0 var(--accent); }

/* Filename caption from ```lang,name=file.ext (rendered as <code data-name>). */
pre:has(code[data-name]) { position: relative; padding-top: 2.6rem; }
pre > code[data-name]::before {
  content: attr(data-name);
  position: absolute; inset: 0 0 auto 0;
  padding: 0.4rem 1rem;
  font-family: var(--font-mono);
  font-size: 0.78rem; color: var(--fg-muted);
  background: var(--code-bg); border-bottom: 1px solid var(--border);
}

/* Included source files (code_file shortcode). */
figure.code-file { margin: 0 0 1rem; }
figure.code-file figcaption {
  font-family: var(--font-mono);
  font-size: 0.78rem; color: var(--fg-muted);
  padding: 0.35rem 0.6rem;
  border: 1px solid var(--border); border-bottom: none;
  background: var(--code-bg);
}
figure.code-file figcaption + pre { margin: 0; }

/* --- Post lists / archive --------------------------------------------- */
.posts { list-style: none; padding: 0; }
.posts li { margin: 0 0 1.4rem; }
.post-link { font-size: 1.2rem; font-weight: 700; }
.excerpt { display: block; color: var(--fg-muted); }
time { font-style: italic; color: var(--fg-muted); }
.posts time { white-space: nowrap; }

/* --- Tags (#tag) ------------------------------------------------------ */
.tags { display: flex; flex-wrap: wrap; gap: 0.4rem 1rem; }
.tag { font-family: var(--font-mono); color: var(--fg-muted); font-size: 0.8rem; text-decoration: none; }
.tag::before { content: "#"; }
.tag:hover { font-weight: 700; }
.tag-cloud { list-style: none; padding: 0; display: flex; flex-wrap: wrap; gap: 1rem; }
.tag-cloud .count { color: var(--fg-muted); font-size: 0.8rem; }
.tag-cloud .count::before { content: "×"; margin-right: 0.15rem; }

/* --- Post page -------------------------------------------------------- */
.post-head { margin-bottom: 1rem; }
.post-head h1 { margin-bottom: 0.15em; }
.post-meta { color: var(--fg-muted); font-style: italic; margin: 0.2rem 0 0.6rem; }

.toc {
  border: 1px solid var(--border);
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
  margin-bottom: 2rem;
}
.toc summary { cursor: pointer; font-weight: 700; }
.toc ul { list-style: none; padding-left: 0.6rem; margin: 0.5rem 0 0.2rem; }
.toc ul ul { padding-left: 1rem; }
.toc a { text-decoration: none; }

.post-nav {
  display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
  margin-top: 2.5rem; padding-top: 1.5rem; border-top: 1px solid var(--gray);
  font-size: 0.9rem;
}
.post-nav .next { margin-left: auto; text-align: right; }

/* --- GitHub-style alerts (> [!NOTE] etc.) ----------------------------- */
[class^="markdown-alert-"] {
  margin: 0 0 1rem;
  padding: 0.6rem 1rem;
  border-left: 4px solid var(--alert-color, var(--accent));
  background: color-mix(in srgb, var(--alert-color, var(--accent)) 10%, transparent);
}
[class^="markdown-alert-"] > :first-child { margin-top: 0; }
[class^="markdown-alert-"] > :last-child { margin-bottom: 0; }
[class^="markdown-alert-"]::before {
  content: attr(data-label);
  display: block;
  font-weight: 700; font-size: 0.82rem; letter-spacing: 0.02em; text-transform: uppercase;
  color: var(--alert-color, var(--accent));
  margin-bottom: 0.3rem;
}
.markdown-alert-note      { --alert-color: var(--blue); }
.markdown-alert-tip       { --alert-color: var(--green); }
.markdown-alert-important { --alert-color: #8250df; }
.markdown-alert-warning   { --alert-color: var(--yellow); }
.markdown-alert-caution   { --alert-color: var(--pink); }
.markdown-alert-note::before      { content: "Note"; }
.markdown-alert-tip::before       { content: "Tip"; }
.markdown-alert-important::before { content: "Important"; }
.markdown-alert-warning::before   { content: "Warning"; }
.markdown-alert-caution::before   { content: "Caution"; }

/* --- Definition lists ------------------------------------------------- */
dt { font-weight: 700; margin-top: 0.6rem; }
dd { margin: 0.15rem 0 0.15rem 1.2rem; color: var(--fg-muted); }

/* --- Misc inline HTML ------------------------------------------------- */
kbd {
  font-family: var(--font-mono);
  font-size: 0.8em; padding: 0.1em 0.4em;
  border: 1px solid var(--border); border-bottom-width: 2px; border-radius: 4px;
  background: var(--code-bg);
}
mark { background: var(--highlight); color: var(--black); padding: 0 0.15em; }
details { border: 1px solid var(--border); padding: 0.6rem 1rem; margin: 0 0 1rem; }
details summary { cursor: pointer; font-weight: 700; }

/* --- Section / page heads, footer, 404 -------------------------------- */
.page-head { margin-bottom: 1.5rem; }
.intro { color: var(--fg); }
.notfound { text-align: center; padding: 3rem 0; }

.site-footer {
  margin-top: 2.5rem;
  padding: 25px 0;
  text-align: center;
  font-size: 0.8rem;
  color: var(--fg-muted);
}