/* Layout: a terminal-flavoured blog on a light page. Powerline prompt bar on top,
   posts first, everything else below as compact "~/about" panels.
   Sharp corners, ANSI-style colours darkened for a light background.
   Single light look on purpose; colours set once on :root. */
:root {
  --bg: #f4f5f7;         /* page */
  --bg2: #ffffff;        /* panels, cards */
  --bg3: #eceef2;        /* code, raised */
  --fg: #15181d;
  --soft: #434b57;
  --dim: #6b7380;
  --line: #d9dde3;
  --ink-on-color: #ffffff;   /* text on coloured powerline segments */

  /* ANSI palette, darkened to read on light grey */
  --red: #c4232f;
  --green: #18794a;
  --yellow: #946200;
  --blue: #0b5fcb;
  --magenta: #7c3fd1;
  --cyan: #0b7484;
  --orange: #b9500a;

  --figure-bg: #ffffff;

  --display: "Martian Mono", "JetBrains Mono", ui-monospace, Consolas, monospace;
  --body: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "Cascadia Mono", Consolas, monospace;
  color-scheme: light;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; background: var(--bg); }
body {
  margin: 0;
  background:
    radial-gradient(1200px 500px at 85% -10%, rgba(11, 95, 203, 0.06), transparent 60%),
    radial-gradient(900px 420px at -10% 10%, rgba(24, 121, 74, 0.05), transparent 60%),
    var(--bg);
  color: var(--fg);
  font: 16px/1.7 var(--body);
}

.wrap {
  max-width: 1040px;
  margin: 0 auto;
  padding-block: 0 72px;
  padding-left: max(18px, env(safe-area-inset-left, 0px));
  padding-right: max(18px, env(safe-area-inset-right, 0px));
}

a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
:focus-visible { outline: 2px solid var(--yellow); outline-offset: 2px; }

/* ---------- powerline prompt bar ---------- */
.pl {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  gap: 0;
  margin: 20px 0 0;
  font: 500 13px/1 var(--mono);
}
.pl span, .pl a {
  display: inline-flex;
  align-items: center;
  padding: 7px 18px 7px 12px;
  color: var(--ink-on-color);
  clip-path: polygon(0 0, calc(100% - 9px) 0, 100% 50%, calc(100% - 9px) 100%, 0 100%);
  margin-right: -4px;
  text-decoration: none;
}
.pl span + span, .pl span + a, .pl a + span, .pl a + a {
  clip-path: polygon(0 0, calc(100% - 9px) 0, 100% 50%, calc(100% - 9px) 100%, 0 100%, 9px 50%);
  padding-left: 18px;
}
.pl .s1 { background: var(--green); font-weight: 700; }
.pl .s2 { background: var(--blue); }
.pl .s3 { background: var(--magenta); }
.pl .s4 { background: var(--bg3); color: var(--soft); }
.pl a.s2:hover { background: var(--cyan); }

/* ---------- hero ---------- */
.hero { padding: 56px 0 18px; }
.hero h1 {
  font: 700 clamp(34px, 6vw, 60px)/1.02 var(--display);
  letter-spacing: -0.04em;
  margin: 0;
  text-wrap: balance;
}
.hero h1 .dot { color: var(--green); }
.hero .lead {
  font: 400 clamp(17px, 2.1vw, 20px)/1.55 var(--body);
  color: var(--soft);
  margin: 18px 0 0;
  max-width: 60ch;
}
.typed { font: 500 14px/1.5 var(--mono); color: var(--dim); margin-top: 26px; }
.typed .u { color: var(--green); }
.typed .p { color: var(--blue); }
.typed .c { color: var(--fg); }
.cursor {
  display: inline-block; width: 0.6em; height: 1.1em; background: var(--green);
  vertical-align: text-bottom; animation: blink 1.1s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }
@media (prefers-reduced-motion: reduce) { .cursor { animation: none; } }

/* ---------- topic chips (sharp, colour per topic) ---------- */
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0 0; }
.chip {
  font: 500 12px/1 var(--mono);
  padding: 6px 9px;
  border: 1px solid currentColor;
  border-radius: 2px;
  background: color-mix(in srgb, currentColor 10%, transparent);
  white-space: nowrap;
}
.chip::before { content: "#"; opacity: 0.6; margin-right: 1px; }
.t-green { color: var(--green); }
.t-yellow { color: var(--yellow); }
.t-blue { color: var(--blue); }
.t-magenta { color: var(--magenta); }
.t-cyan { color: var(--cyan); }
.t-red { color: var(--red); }
.t-orange { color: var(--orange); }

/* ---------- section label ---------- */
.label {
  display: flex; align-items: baseline; gap: 12px;
  margin: 64px 0 18px;
  font: 600 13px/1 var(--mono);
  color: var(--dim);
}
.label b { color: var(--yellow); font-weight: 600; }
.label::after { content: ""; flex: 1; height: 1px; background: var(--line); transform: translateY(-3px); }

/* ---------- featured post ---------- */
.feature {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  border: 1px solid var(--line);
  background: var(--bg2);
  border-radius: 2px;
  color: inherit;
  text-decoration: none;
  transition: border-color .15s ease, transform .15s ease;
}
.feature:hover { border-color: var(--blue); text-decoration: none; transform: translateY(-2px); }
.feature .body { padding: 28px 30px; min-width: 0; display: flex; flex-direction: column; gap: 14px; }
.feature .meta, .plist .meta { font: 12px/1.4 var(--mono); color: var(--dim); font-variant-numeric: tabular-nums; }
.feature h2 {
  font: 700 clamp(22px, 2.8vw, 30px)/1.18 var(--display);
  letter-spacing: -0.03em;
  margin: 0;
  color: var(--fg);
  text-wrap: balance;
}
.feature p { margin: 0; color: var(--soft); }
.feature .go { font: 600 13px/1 var(--mono); color: var(--green); margin-top: auto; }
.feature .cover {
  background: var(--figure-bg);
  border-left: 1px solid var(--line);
  display: flex; align-items: center; justify-content: center;
  padding: 14px; min-width: 0;
}
.feature .cover img { width: 100%; height: auto; display: block; }

.plist { display: grid; gap: 0; margin-top: 10px; }
.plist a.item {
  display: grid; grid-template-columns: 14ch 1fr; gap: 18px;
  padding: 14px 0; border-bottom: 1px solid var(--line); color: inherit;
}
.plist a.item:hover { text-decoration: none; }
.plist a.item:hover .t { color: var(--blue); }
.plist .t { font: 600 17px/1.35 var(--display); letter-spacing: -0.02em; }

/* ---------- about grid ---------- */
.grid2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.panel {
  border: 1px solid var(--line);
  background: var(--bg2);
  border-radius: 2px;
  padding: 22px 24px;
  min-width: 0;
}
.panel h3 {
  margin: 0 0 14px;
  font: 600 13px/1 var(--mono);
  color: var(--dim);
}
.panel h3 .u { color: var(--green); }
.panel h3 .c { color: var(--fg); }
.panel p { margin: 0 0 12px; color: var(--soft); }
.panel p:last-child { margin-bottom: 0; }
.panel.span2 { grid-column: 1 / -1; }

.entry + .entry { margin-top: 18px; }
.entry .h { font: 600 15px/1.4 var(--display); letter-spacing: -0.02em; color: var(--fg); }
.entry .h a { color: var(--blue); }
.entry .m { font: 12px/1.5 var(--mono); color: var(--dim); margin-top: 3px; }
.entry .d { color: var(--soft); margin-top: 6px; font-size: 15px; }
.entry .authors { font-size: 15px; color: var(--soft); margin-top: 4px; }
.entry .authors b { color: var(--green); font-weight: 600; }
.entry ul { margin: 8px 0 0; padding-left: 18px; color: var(--soft); font-size: 15px; }
.entry li { margin-bottom: 4px; }
.entry .chips { margin-top: 10px; }
.entry .link { display: inline-block; margin-top: 8px; font: 600 13px/1 var(--mono); }

.kv { display: grid; grid-template-columns: 8ch 1fr; column-gap: 2ch; row-gap: 6px; font: 14px/1.5 var(--mono); }
.kv .k { color: var(--dim); }
.kv .v { min-width: 0; overflow-wrap: anywhere; }

/* ---------- post page ---------- */
.post-head { padding: 48px 0 8px; max-width: 760px; }
.post-head h1 {
  font: 700 clamp(30px, 4.6vw, 48px)/1.08 var(--display);
  letter-spacing: -0.04em;
  margin: 14px 0 0;
  text-wrap: balance;
}
.post-head .meta { font: 13px/1.5 var(--mono); color: var(--dim); margin-top: 16px; }
.post-head .meta b { color: var(--soft); font-weight: 500; }
.post-head .lead { font-size: 19px; color: var(--soft); margin: 18px 0 0; }

article { max-width: 760px; font-size: 17.5px; line-height: 1.75; margin-top: 28px; }
article p { margin: 0 0 18px; }
article strong { color: var(--fg); }
article h2 {
  font: 700 22px/1.25 var(--display);
  letter-spacing: -0.03em;
  margin: 52px 0 16px;
  text-wrap: balance;
}
article h2::before { content: "## "; color: var(--green); }
article h3 { font: 600 18px/1.3 var(--display); margin: 34px 0 10px; }
article h3::before { content: "### "; color: var(--cyan); }
article ul, article ol { padding-left: 22px; margin: 0 0 18px; }
article li { margin-bottom: 6px; }
article li::marker { color: var(--green); }
article a { color: var(--blue); text-decoration: underline; text-decoration-color: color-mix(in srgb, var(--blue) 40%, transparent); text-underline-offset: 3px; }
article code {
  font: 0.86em var(--mono);
  color: var(--yellow);
  background: var(--bg3);
  padding: 1px 5px;
  border-radius: 2px;
}
article pre { background: var(--bg3); border: 1px solid var(--line); border-radius: 2px; padding: 14px 16px; overflow-x: auto; font: 14px/1.55 var(--mono); }
article pre code { background: none; padding: 0; color: var(--fg); }
article blockquote {
  margin: 26px 0;
  padding: 16px 20px;
  background: color-mix(in srgb, var(--orange) 8%, var(--bg2));
  border: 1px solid color-mix(in srgb, var(--orange) 35%, var(--line));
  border-radius: 2px;
  color: var(--soft);
  font-size: 16px;
}
article blockquote p { margin: 0; }
article blockquote strong { color: var(--orange); }

article figure { margin: 34px 0; }
article figure.wide { width: min(1000px, calc(100vw - 36px)); max-width: none; }
article figure img {
  display: block; width: 100%; height: auto;
  background: var(--figure-bg);
  border: 1px solid var(--line);
  border-radius: 2px;
  padding: 10px;
}
article figcaption {
  font: 13px/1.55 var(--mono);
  color: var(--dim);
  margin-top: 10px;
  max-width: 760px;
}
article figcaption::before { content: "↳ "; color: var(--magenta); }

.post-foot { margin-top: 56px; padding-top: 22px; border-top: 1px solid var(--line); display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; font: 13px/1.5 var(--mono); }

footer.site { margin-top: 72px; padding-top: 18px; border-top: 1px solid var(--line); font: 12px/1.5 var(--mono); color: var(--dim); display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }

@media (max-width: 760px) {
  .feature { grid-template-columns: 1fr; }
  .feature .cover { border-left: 0; border-top: 1px solid var(--line); order: -1; }
  .feature .body { padding: 22px 20px; }
  .grid2 { grid-template-columns: 1fr; }
  .plist a.item { grid-template-columns: 1fr; gap: 4px; }
  article { font-size: 16.5px; }
  article figure.wide { width: 100%; }
  article figure img { padding: 4px; }
}

/* entries laid out in a grid get their spacing from the grid gap, not margins */
.grid2 { row-gap: 26px; }
.grid2 > .entry + .entry { margin-top: 0; }
.panel .gap { height: 22px; }

/* ---------- tables inside posts ---------- */
article .table-wrap {
  overflow-x: auto;
  margin: 26px 0 8px;
  border: 1px solid var(--line);
  background: var(--bg2);
  border-radius: 2px;
}
article table { border-collapse: collapse; width: 100%; font: 14px/1.45 var(--mono); font-variant-numeric: tabular-nums; }
article th, article td { padding: 8px 14px; border-bottom: 1px solid var(--line); text-align: right; white-space: nowrap; }
article th:first-child, article td:first-child { text-align: left; }
article thead th { background: var(--bg3); color: var(--soft); font-weight: 600; }
article tbody tr:last-child td { border-bottom: 0; }
article tr.hl td { background: color-mix(in srgb, var(--orange) 12%, var(--bg2)); color: var(--fg); font-weight: 600; }
article .table-note { font: 13px/1.55 var(--mono); color: var(--dim); margin: 0 0 26px; }
article .table-note::before { content: "↳ "; color: var(--magenta); }

/* figures whose image already has a dark background: no white frame */
article figure.dark img { padding: 0; background: none; }
article figcaption code { font-size: 0.95em; padding: 0 3px; }

/* featured label */
.feature .meta .pin { color: var(--magenta); }