/* ============================================================================ sunilbhatia.ai — Option B, "Engineering Log" White ground, mono for chrome, sans for prose, one amber accent. Syntax highlighting lives in syntax.css. ========================================================================= */ /* ── Theme ─────────────────────────────────────────────────────────────── Three states, not two. An explicit choice stamps data-theme on ; the default ("system") stamps nothing, and only prefers-color-scheme separates light from dark. So: bare :root carries the complete light palette, the media query overrides tokens unless light was explicitly chosen, and [data-theme="dark"] overrides them again so the toggle wins in both directions. Every colour in this file comes from a token. Nothing is styled inside a media block — a colour defined only behind prefers-color-scheme never applies in the un-stamped state, which is how you get dark text on a dark ground for the majority of visitors who never touch the toggle. ──────────────────────────────────────────────────────────────────────── */ :root { color-scheme: light dark; --bg: #FFFFFF; --surface: #FAFAF8; /* raised panels: table headers, code */ --ink: #111417; /* headings, emphasis */ --body: #363C43; /* running prose */ --muted: #626A72; /* excerpts, secondary prose */ --soft: #737B84; /* labels, nav */ --faint: #6E767E; /* mono metadata — 4.6:1, AA at 10px */ --mono-v: #2A2F35; /* rail values — a touch darker than body */ --rule: #E6E9EC; --rule-soft: #F0F2F4; --accent: #8C4A0F; /* the single accent — amber-brown */ --accent-wash: #FBEBD8; /* highlight behind emphasised text */ --accent-line: #E7C79E; /* underlines on accent links */ --marker: #C9A47A; /* the § before article section headings */ --inline-bg: #F4F5F3; /* `code` inside a sentence */ --inline-fg: #7A4110; --inline-border: #EAEBE7; /* Typography. These are system stacks so the site renders instantly with no webfont request and no layout shift. To self-host a real pair later, drop the .woff2 files in /public/fonts, add @font-face rules here, and put the family names at the front of --sans and --mono. Nothing else changes. */ --sans: "Avenir Next", "Helvetica Neue", Helvetica, Arial, system-ui, sans-serif; --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace; --measure: 66ch; --page: 1000px; --gutter: 40px; } /* Dark. Not an inversion — a warm-neutral ground chosen so the amber accent still reads as the same accent, body text is a warm off-white rather than pure #FFF (which glares at long-form sizes), and the accent is lifted from #8C4A0F to #E0A56A because the original is unreadable on a dark ground. */ @media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) { --bg: #15161A; --surface: #1B1D22; --ink: #F0EEEA; --body: #D2CFC9; --muted: #A29D96; --soft: #8E8983; --faint: #8C877F; --mono-v: #C6C3BD; --rule: #2A2D33; --rule-soft: #212429; --accent: #E0A56A; --accent-wash: rgba(224, 165, 106, 0.16); --accent-line: rgba(224, 165, 106, 0.45); --marker: #A8845A; --inline-bg: #21242A; --inline-fg: #E3B183; --inline-border: #2E323A; } } :root[data-theme="dark"] { --bg: #15161A; --surface: #1B1D22; --ink: #F0EEEA; --body: #D2CFC9; --muted: #A29D96; --soft: #8E8983; --faint: #8C877F; --mono-v: #C6C3BD; --rule: #2A2D33; --rule-soft: #212429; --accent: #E0A56A; --accent-wash: rgba(224, 165, 106, 0.16); --accent-line: rgba(224, 165, 106, 0.45); --marker: #A8845A; --inline-bg: #21242A; --inline-fg: #E3B183; --inline-border: #2E323A; } *, *::before, *::after { box-sizing: border-box; } html { -webkit-text-size-adjust: 100%; } body { margin: 0; background: var(--bg); color: var(--ink); font-family: var(--sans); font-size: 16px; line-height: 1.6; -webkit-font-smoothing: antialiased; display: flex; flex-direction: column; min-height: 100vh; } a { color: inherit; } img { max-width: 100%; height: auto; } :focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 2px; } .skip { position: absolute; left: -9999px; top: 0; background: var(--bg); color: var(--ink); padding: 10px 16px; border: 1px solid var(--rule); font-family: var(--mono); font-size: 12px; z-index: 10; } .skip:focus { left: 8px; top: 8px; } /* ── header ──────────────────────────────────────────────────────────── */ .top { display: flex; align-items: baseline; justify-content: space-between; gap: 24px; flex-wrap: wrap; padding: 18px var(--gutter); border-bottom: 1px solid var(--rule); max-width: var(--page); width: 100%; margin: 0 auto; } .mark { font-family: var(--mono); font-size: 13px; font-weight: 600; letter-spacing: -0.01em; text-decoration: none; color: var(--ink); } .topright { display: flex; align-items: baseline; gap: 20px; } .nav { display: flex; gap: 20px; } .nav a { font-size: 13px; color: var(--soft); text-decoration: none; } .nav a:hover { color: var(--ink); } .nav a.on { color: var(--accent); box-shadow: inset 0 -1px 0 var(--accent-line); } /* Hidden unless theme.js ran — a control that cannot work should not be shown. */ .themetoggle { display: none; } .js .themetoggle { display: inline-block; font-family: var(--mono); font-size: 14px; line-height: 1; color: var(--soft); background: none; border: 0; padding: 2px 4px; cursor: pointer; } .js .themetoggle:hover { color: var(--accent); } /* ── layout: metadata rail + content ─────────────────────────────────── */ .grid { display: grid; grid-template-columns: 172px minmax(0, 1fr); gap: 44px; align-items: start; padding: 34px var(--gutter) 40px; max-width: var(--page); width: 100%; margin: 0 auto; flex: 1 0 auto; } .grid.narrow { grid-template-columns: minmax(0, 1fr); } /* The rail is a
. On a phone it collapses so the article starts at the top of the screen; on a wide screen it is never collapsed and the summary is hidden. Native
means it works with JavaScript off and gets keyboard support and the right ARIA state for free. */ .rail { border-right: 1px solid var(--rule); padding-right: 22px; position: sticky; top: 24px; } .railbody { display: flex; flex-direction: column; gap: 19px; } .rail > summary { display: flex; align-items: center; justify-content: space-between; gap: 10px; cursor: pointer; list-style: none; font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--faint); padding: 2px 0 10px; } .rail > summary::-webkit-details-marker { display: none; } .rail > summary::after { content: "\25BE"; font-size: 11px; transition: transform 0.15s ease; } .rail[open] > summary::after { transform: rotate(180deg); } .rail > summary:hover { color: var(--accent); } @media (prefers-reduced-motion: reduce) { .rail > summary::after { transition: none; } } /* Wide screens: no toggle, and the content shows whether or not the element carries [open]. Chrome hides it via ::details-content, other engines via a display rule on the child — override both. */ @media (min-width: 821px) { .rail > summary { display: none; } .rail > .railbody { display: flex; } .rail::details-content { content-visibility: visible; block-size: auto; } } .meta { display: flex; flex-direction: column; gap: 4px; } .k { font-family: var(--mono); font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--faint); } .v { font-family: var(--mono); font-size: 12.5px; line-height: 1.5; color: var(--mono-v); } .v.live { color: var(--accent); } .v a { color: var(--mono-v); text-decoration: none; border-bottom: 1px solid var(--rule); } .v a:hover { color: var(--accent); border-bottom-color: var(--accent-line); } .railnav { display: flex; flex-direction: column; gap: 7px; font-family: var(--mono); font-size: 12.5px; } .railnav a { color: var(--soft); text-decoration: none; } .railnav a:hover { color: var(--ink); } .railnav a.on { color: var(--accent); } .toc { display: flex; flex-direction: column; gap: 8px; font-size: 12px; } .toc a { color: var(--soft); text-decoration: none; line-height: 1.45; } .toc a:hover { color: var(--accent); } .toc a.sub { padding-left: 10px; font-size: 11.5px; } .main { display: flex; flex-direction: column; gap: 26px; min-width: 0; } /* ── identity block ──────────────────────────────────────────────────── */ .id { display: flex; align-items: center; gap: 18px; } .portrait { width: 84px; height: 84px; border-radius: 50%; flex: none; object-fit: cover; box-shadow: 0 0 0 1px var(--rule); } .id h1 { font-family: var(--mono); font-size: 26px; margin: 0 0 5px; font-weight: 600; letter-spacing: -0.02em; color: var(--ink); } .id .sub { font-size: 13px; color: var(--soft); margin: 0; line-height: 1.55; } .lede { font-size: 16.5px; line-height: 1.8; color: var(--body); margin: 0; max-width: 64ch; } .lede b { font-weight: 600; color: var(--ink); box-shadow: inset 0 -7px 0 var(--accent-wash); } .pagetitle { font-size: 26px; margin: 0; font-weight: 600; letter-spacing: -0.02em; } .pagetitle .filter { color: var(--accent); font-weight: 400; } .sechead { font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--faint); font-weight: 400; margin: 0; display: flex; align-items: center; gap: 12px; } .sechead::after { content: ""; flex: 1; height: 1px; background: var(--rule); } .more { font-family: var(--mono); font-size: 12.5px; color: var(--accent); text-decoration: none; align-self: flex-start; } .more span { border-bottom: 1px solid var(--accent-line); padding-bottom: 2px; } /* ── post list ───────────────────────────────────────────────────────── */ .posts { display: flex; flex-direction: column; } .post { padding: 18px 0; border-bottom: 1px solid var(--rule-soft); display: flex; flex-direction: column; gap: 7px; } .post:first-child { padding-top: 4px; } .pmeta { font-family: var(--mono); font-size: 11px; color: var(--faint); display: flex; gap: 12px; flex-wrap: wrap; } .pmeta .tg { color: var(--accent); } .post h3 { font-size: 18.5px; margin: 0; font-weight: 600; letter-spacing: -0.012em; line-height: 1.35; } .post h3 a { text-decoration: none; color: var(--ink); } .post h3 a:hover { color: var(--accent); } .post p { margin: 0; font-size: 14.5px; line-height: 1.7; color: var(--muted); max-width: var(--measure); } /* ── article ─────────────────────────────────────────────────────────── */ .art { gap: 22px; } .crumb { font-family: var(--mono); font-size: 11.5px; color: var(--faint); margin: 0; } .crumb a { color: var(--soft); text-decoration: none; } .crumb a:hover { color: var(--accent); } .art h1 { font-size: 30px; line-height: 1.25; margin: 0; max-width: 24ch; font-weight: 600; letter-spacing: -0.022em; color: var(--ink); text-wrap: balance; } .amet { font-family: var(--mono); font-size: 11.5px; color: var(--faint); display: flex; gap: 14px; flex-wrap: wrap; } .amet .tg { color: var(--accent); } .body { display: flex; flex-direction: column; gap: 20px; min-width: 0; } .body > p { font-size: 17px; line-height: 1.8; color: var(--body); margin: 0; max-width: var(--measure); } .body h2 { font-size: 16px; margin: 14px 0 0; font-weight: 600; color: var(--ink); letter-spacing: -0.005em; scroll-margin-top: 20px; display: flex; align-items: baseline; gap: 10px; } .body h2::before { content: "§"; color: var(--marker); font-family: var(--mono); font-size: 13px; } .body h3 { font-size: 14.5px; margin: 8px 0 0; font-weight: 600; color: var(--ink); scroll-margin-top: 20px; } .body ul, .body ol { margin: 0; padding-left: 20px; display: flex; flex-direction: column; gap: 8px; max-width: var(--measure); } .body li { font-size: 17px; line-height: 1.75; color: var(--body); } .body a { color: var(--accent); text-decoration: none; border-bottom: 1px solid var(--accent-line); } .body a:hover { border-bottom-width: 2px; } .body blockquote { margin: 4px 0; padding: 2px 0 2px 18px; border-left: 2px solid var(--accent-line); font-size: 17px; line-height: 1.75; color: var(--muted); max-width: 64ch; } .body blockquote p { margin: 0; } .body hr { border: 0; border-top: 1px solid var(--rule); margin: 8px 0; } .body img { border-radius: 4px; box-shadow: 0 0 0 1px var(--rule); } .body table { border-collapse: collapse; font-size: 14.5px; display: block; overflow-x: auto; max-width: 100%; } .body th, .body td { border: 1px solid var(--rule); padding: 8px 12px; text-align: left; } .body th { background: var(--surface); font-weight: 600; } /* Markdown's other code block: four-space indentation. It bypasses the fence renderer, so it arrives as a bare 
 with no language and no caption.
   Give it the same surface as a fenced block rather than leaving it naked. */
.body > pre {
  margin: 0;
  padding: 14px 16px;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--code-fg);
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  border-radius: 5px;
  max-width: 100%;
}
.body > pre code {
  font-family: inherit;
  font-size: inherit;
  background: none;
  border: 0;
  padding: 0;
  color: inherit;
}

/* Inline code, distinct from block code. */
.body p code, .body li code, .body td code, .body h2 code, .body h3 code {
  font-family: var(--mono);
  font-size: 0.84em;
  background: var(--inline-bg);
  color: var(--inline-fg);
  padding: 2px 5px;
  border-radius: 3px;
  border: 1px solid var(--inline-border);
}

.artnav {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  border-top: 1px solid var(--rule);
  padding-top: 18px;
  margin-top: 8px;
}
.artnav a {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--soft);
  text-decoration: none;
  max-width: 30ch;
  line-height: 1.5;
}
.artnav a:hover { color: var(--ink); }
.artnav a.next { text-align: right; margin-left: auto; }
.artnav a b {
  display: block;
  color: var(--accent);
  font-weight: 400;
  margin-bottom: 4px;
  font-size: 10.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

/* ── archive ─────────────────────────────────────────────────────────── */
.arch { display: flex; flex-direction: column; gap: 26px; }
.year { display: flex; flex-direction: column; gap: 2px; }
.yr {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--faint);
  padding-bottom: 8px;
  margin: 0;
  font-weight: 400;
}
.arow {
  display: grid;
  grid-template-columns: 88px minmax(0, 1fr) auto;
  gap: 16px;
  padding: 8px 0;
  border-top: 1px solid var(--rule-soft);
  align-items: baseline;
}
.arow .d { font-family: var(--mono); font-size: 11.5px; color: var(--faint); }
.arow .t { font-size: 15px; color: var(--ink); text-decoration: none; line-height: 1.45; }
.arow .t:hover { color: var(--accent); }
.arow .g { font-family: var(--mono); font-size: 10.5px; color: var(--accent); }

/* ── books ───────────────────────────────────────────────────────────── */
.books { display: flex; flex-direction: column; }
.book { padding: 16px 0; border-bottom: 1px solid var(--rule-soft); display: flex; gap: 18px; align-items: baseline; }
.book .st {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--faint);
  width: 88px;
  flex: none;
  padding-top: 3px;
}
.book .st.now { color: var(--accent); }
.book .bi { display: flex; flex-direction: column; gap: 5px; min-width: 0; }
.book .bt { font-size: 16px; font-weight: 600; color: var(--ink); letter-spacing: -0.01em; }
.book .ba { font-family: var(--mono); font-size: 11.5px; color: var(--faint); }
.book .bn { font-size: 14.5px; line-height: 1.7; color: var(--muted); max-width: 60ch; margin-top: 2px; }
.book .bn a { color: var(--accent); text-decoration: none; border-bottom: 1px solid var(--accent-line); }

/* ── legal / about prose ─────────────────────────────────────────────── */
.legal { display: flex; flex-direction: column; gap: 18px; max-width: var(--measure); }
.legal h1 { font-size: 27px; margin: 0; font-weight: 600; letter-spacing: -0.02em; }
.legal .dt {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--soft);
  border-left: 2px solid var(--accent-line);
  padding-left: 12px;
  margin: 0;
}
.legal h2 {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 12px 0 0;
  font-weight: 600;
}
.legal p { font-size: 16.5px; line-height: 1.8; color: var(--body); margin: 0; }
.legal ul { margin: 0; padding-left: 20px; display: flex; flex-direction: column; gap: 8px; }
.legal li { font-size: 16.5px; line-height: 1.75; color: var(--body); }
.legal b, .legal strong { color: var(--ink); font-weight: 600; }
.legal a { color: var(--accent); text-decoration: none; border-bottom: 1px solid var(--accent-line); }

/* ── footer ──────────────────────────────────────────────────────────── */
.foot {
  border-top: 1px solid var(--rule);
  padding: 16px var(--gutter) 28px;
  max-width: var(--page);
  width: 100%;
  margin: 0 auto;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--faint);
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
}
.foot a { color: var(--soft); text-decoration: none; }
.foot a:hover { color: var(--accent); }

/* ── responsive ──────────────────────────────────────────────────────── */
@media (max-width: 820px) {
  :root { --gutter: 22px; }

  .grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
    padding-top: 26px;
  }

  /* Collapsed by default: the article is what you came for. Tapping the
     summary opens the metadata as a wrapped row rather than a tall column. */
  .rail {
    position: static;
    border-right: 0;
    border-bottom: 1px solid var(--rule);
    padding: 0 0 4px;
  }
  .rail[open] { padding-bottom: 16px; }
  .railbody {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 16px 26px;
  }
  .railnav, .toc { flex-direction: row; flex-wrap: wrap; gap: 6px 14px; }

  .art h1 { font-size: 26px; }
  .id { gap: 14px; }
  .portrait { width: 68px; height: 68px; }
  .id h1 { font-size: 22px; }
  .arow { grid-template-columns: 72px minmax(0, 1fr); }
  .arow .g { display: none; }
  .book { flex-direction: column; gap: 8px; }
  .book .st { width: auto; padding-top: 0; }
}

@media print {
  .top, .rail, .foot, .artnav, .skip { display: none; }
  .grid { gap: 0; }
  .grid { grid-template-columns: 1fr; padding: 0; }
  body { font-size: 12pt; }
}